• 专利附录
  • 专利说明
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    • 专利摘要:
    An electrical connector (20) includes a housing (21) to be mounted in a second electrical connector, and a cylindrical hollow terminal (23) engaging a protruding terminal disposed in the second electrical connector when the projecting terminal is inserted into the housing. cylindrical hollow terminal (23), the housing (21) and the cylindrical hollow terminal (23) being formed integrally with one another by an insertion molding process, the hollow cylindrical terminal (23) being formed with a structure (231a) for preventing molten resin from flowing into an area at which the cylindrical hollow terminal (23) and the projecting terminal come into contact with each other while the insertion molding process is performed.
    公开号:FR3028357A1
    申请号:FR1560754
    申请日:2015-11-10
    公开日:2016-05-13
    发明作者:Takayoshi Endo；Shuji Touno
    申请人:Dai Ichi Seiko Co Ltd；
    IPC主号:
    专利说明:

    [0001] The invention relates to an electrical connector comprising a housing to be mounted in a second electrical connector, and a cylindrical hollow terminal contacting a protruding terminal disposed in the second electrical connector when the projecting terminal is inserted into the hollow cylindrical terminal. . The invention further relates to a method of manufacturing the electrical connector.
    [0002] An electrical connector is known comprising a cylindrical connector. The electrical connector establishes an electrical connection with a second electrical connector including a protruding terminal when the protruding terminal is inserted into the cylindrical connector of the electrical connector. Even if the electrical connector and the second electrical connector are mounted one inside the other with the electrical connector or the second electrical connector which is rotated about an axis thereof, it is possible to bring a surface outer surface of the protruding terminal and an inner surface of the cylindrical terminal to come into contact with each other. Since the electrical connector and the second electrical connector can be mounted to each other even if they are rotated about an axis thereof in any direction, it is possible to cause them to be mounted manually one in the other in an invisible configuration. The aforementioned electrical connector is used in an incandescent spark plug acting as a spark plug or glow plug in an engine, or is used as a connector for connecting a combustion pressure sensor to a wiring harness.
    [0003] Fig. 18 is a sectional view of an incandescent candle connector suggested in Japanese Patent Application Publication No. 2005-207730. The incandescent plug connector illustrated includes a connector housing 1001 and a connector 1002. The connector housing 1001 includes sensor contact terminals 1011 through 1013 disposed on an inner wall of the connector housing 1001. The connector 1002 includes a tube Hollow 1003 extending coaxially and longitudinally centrally with respect to the connector 1002. Contact terminals 1014 to 1016 are disposed on an outer wall of the tube 1003. The contact terminals 1014 to 1016 come into contact with the contact terminals of FIG. 1011 to 1013, respectively, when the connector housing 1001 is mounted in the connector 1002. In the tube 1003 there is disposed a current contact 1006 which comes into contact with a current contact 1005 of the connector housing 1001 where the connector 1001 is mounted in connection 1002.
    [0004] A coaxial connector is known comprising a first electrical connector having a protruding terminal, and a second electrical connector having a cylindrical connector. The first and second connectors can be mounted to each other only in a predetermined direction. Fig. 19 is a sectional view of the coaxial connector suggested in Japanese Patent Application Publication No. 2012-129103. The coaxial connector illustrated comprises a female connector 1110 and a male connector 1120. The female connector 1110 comprises a female housing 1110H, a female external terminal 1110To housed in the female housing 1110H, a female inner terminal 1110Ti disposed in the female outer terminal 1110To, and a dielectric 1110D disposed between the female outer terminal 1110To and the inner female terminal 1110Ti. The male connector 1120 comprises a male housing 1120H, a male outer terminal 1120To housed in the male housing 1120H, and a male inner terminal 1120Ti disposed in the male outer terminal 1120To. In the coaxial connector illustrated in Fig. 19, the female housing 1110H and the dielectric 1110D are formed integrally with each other, and a full circumferential shield for a region at which the inner female terminal 1110Ti and the inner male terminal 1120Ti contacting each other is defined by a half-cylinder of the male outer terminal 1120To and a half-cylinder of the female outer terminal 1110To. In the coaxial connector shown in Fig. 19, the inner female terminal 1110Ti (a cylindrical terminal) is coaxially surrounded by the dielectric 1110D formed integrally with the female housing 1110H.
    [0005] Thus, the female inner terminal 1110Ti is firmly supported on an outer surface by the dielectric 1110D. In a one-piece forming process of a cylindrical terminal and a housing, a cylindrical terminal is placed in a cavity of a die, and then molten resin for forming a housing is poured into the cavity. Thus, the resulting housing has the same shape as that of the cavity. When the housing is formed, it is necessary to insert a protruding terminal in the cylindrical terminal to provide space in an interior space of the cylindrical terminal. The space means a space in which the projecting terminal comes into contact with an inner surface of the cylindrical terminal.
    [0006] The above-identified Japanese patent application publications are silent about the steps of forming a housing. For example, if steps of disposing a cylindrical terminal in a cavity of a die and pouring the molten resin into the cavity were simply performed, the molten resin would flow into an interior space of the cylindrical terminal, and thus, it would not be possible to provide a space in which the projecting terminal comes into contact with the cylindrical terminal. Due to the aforementioned problems in conventional electrical connectors, it is an object of the present invention to provide an electrical connector capable of providing, in a case forming process, a space in which a projecting terminal comes into contact with a cylindrical terminal to thereby make it possible to form a cylindrical terminal and a housing integrally with one another by means of an insertion molding process. It is also an object of the present invention to provide a method of manufacturing the above-mentioned electrical connector. In one aspect of the present invention, there is provided an electrical connector comprising a housing to be mounted in a second electrical connector, and a cylindrical hollow terminal contacting a protruding terminal disposed in the second electrical connector when the projecting terminal is inserted into a second electrical connector. the hollow cylindrical terminal, the housing and the cylindrical hollow terminal being formed integrally with each other by an insertion molding process, the cylindrical hollow terminal being formed with a structure for preventing molten resin to flow into an area where the cylindrical hollow terminal and the projecting terminal come into contact with each other while the insertion molding process is performed. The electrical connector according to the present invention is adapted to include a structure for preventing molten resin from flowing into an area where the cylindrical hollow terminal and the projecting terminal come into contact with each other then that the insertion molding process is performed. Thus, it is possible to provide a space in which the projecting terminal comes into contact with the cylindrical terminal while the housing is formed. It is preferable that the structure consists of a protrusion protruding from an inner wall to an interior space of the cylindrical hollow terminal. For example, the projection is annular. In an insertion molding process for forming the housing and the cylindrical terminal integrally with one another, a bar-shaped die is inserted into the cylindrical terminal in which the projecting terminal has already been inserted through a distal end of the cylindrical terminal to thereby make contact with the protrusion acting as a resin flow prevention structure. As a result, a clearance between the bar-shaped die and the projection is closed. Thus, an area where the cylindrical hollow terminal and the projecting terminal come into contact with each other while the insertion molding process is performed can be closed. It is preferred that the cylindrical hollow terminal is formed on an outer wall thereof with a recess in the same location as the projection. Molten resin from which a housing is formed can be introduced into the recess, ensuring that the resin in the recess prevents the cylindrical terminal from being removed. On the other hand, since the recess can be formed by pressing on an outer surface of the cylindrical terminal when the protrusion is formed in the cylindrical terminal, it is possible to form in one step at a time the projection on an inner wall and the recess. on an outer wall of the cylindrical terminal. It is preferred that a plurality of projections are formed in a longitudinal direction of the cylindrical hollow terminal. Since a rod-like matrix contacts the cylindrical terminal in a plurality of locations, even if molten resin passes through the first projection, the second projection may stop the molten resin. Therefore, it is surely possible to prevent molten resin from flowing into an area at which the cylindrical hollow terminal and the projecting terminal come into contact with each other while the process of insertion molding is performed, thereby to provide a space in which the projecting terminal is inserted into the cylindrical terminal. It is preferred that the cylindrical hollow terminal is formed at a circumferential wall with at least one hole opening between a proximal end of the cylindrical hollow terminal and the projection, in which case the through hole can be filled with resin. It is preferable that the structure consists of a closed section having a closed proximal end of the cylindrical hollow terminal, the closed section having a thickness smaller than a diameter of the hollow cylindrical terminal and a width greater than a diameter. of the cylindrical hollow terminal.
    [0007] Since the cylindrical terminal is closed at a distal end thereof by means of the closed section when the housing and the cylindrical terminal are formed integrally with one another by an insertion molding process, it is It is possible to close an area where the cylindrical hollow terminal and the projecting terminal come into contact with each other. It is preferable that the closed section is formed by a process of working with the press.
    [0008] The cylindrical terminal can easily be closed at a distal end by a press work process. It is preferable that the housing consists of an inner housing to be mounted in a first space formed in an outer housing of the second electrical connector, the inner housing being formed with a second space in which a first axis disposed in the first space is inserted, and a second axis disposed in the second space and guided in a guide hole formed in the first axis, the hollow cylindrical terminal being formed as a part of the second axis. A housing of the second electrical connector is comprised of an outer casing, and a casing of the electrical connector according to the present invention comprises an inner casing to be mounted in the first space formed in the outer casing. The inner case is formed with the second space and the second axis. Therefore, when the outer and inner housings are inserted into each other, the inner housing is inserted into the first space of the outer housing, and the second axis formed into the second space of the inner housing is inserted into the housing hole. guide. The cylindrical terminal as part of the second axis is inserted into the guide hole so as to come into contact with the projecting terminal disposed in the guide hole. It is preferred that at least a first contact terminal is formed on an outer surface of the first axis, and at least one second contact terminal contacting the first contact terminal is formed on an interior surface of the second space. When the outer and inner housings are inserted into each other, the first and second contact terminals come into contact with each other, while the cylindrical terminal comes into contact with the projecting terminal. In another aspect of the present invention there is provided a method of manufacturing an electrical connector, comprising inserting a bar into a cylindrical hollow terminal to thereby cause the bar to come into contact with a protrusion mentioned later. the cylindrical hollow terminal coming into contact with a projecting terminal disposed in a second electrical connector. when the protruding terminal is inserted into the cylindrical hollow terminal, and comprising an annular projection which protrudes from an inner wall to an interior space of the cylindrical hollow terminal, the hollow cylindrical terminal preventing molten resin for an insertion molding process to flow into an area where the cylindrical hollow terminal and the projecting terminal come into contact with each other while the insertion molding process is performed, and to perform an insertion molding process for forming a housing to be mounted in the second electrical connector and the hollow cylindrical terminal integrally with each other. The electrical connector mentioned above can be manufactured according to the method.
    [0009] In still another aspect of the present invention, there is provided a method of manufacturing an electrical connector, comprising preparing a cylindrical hollow terminal for contact with a protruding terminal disposed in a second electrical connector when the projecting terminal is inserted. in the hollow cylindrical terminal, and having a closed section having a proximal end closed away from a distal end into which the projecting terminal is inserted, and performing an insertion molding process to form a housing to be mounted in the second electrical connector and the hollow cylindrical terminal integrally with each other. The electrical connector mentioned above can be manufactured according to the method. The advantages obtained by the present invention mentioned above will be described below. The electrical connector according to the present invention can prevent molten resin for the insertion molding process from flowing into an area where the cylindrical hollow terminal and the projecting terminal come into contact with each other then that the insertion molding process is performed. Thus, it is possible to provide a space in which the projecting terminal is inserted into the cylindrical terminal while the housing is formed. Thus, the present invention makes it possible to form the cylindrical terminal and the housing in one piece with one another by means of an insertion molding process.
    [0010] Fig. 1 is a perspective view of a second electrical connector in which an electrical connector according to the first embodiment of the present invention is inserted.
    [0011] FIG. 2 is a front view of the second electrical connector illustrated in FIG. 1. FIG. 3 is a sectional view of the second electrical connector along line AA shown in FIG. 2. FIG. 4 is a perspective view of FIG. a protruding terminal as part of the second electrical connector shown in Fig. 1. Fig. 5 is a plan view of a metal sheet from which the protruding terminal shown in Fig. 4 is made. Fig. 6 is a perspective view of an electrical connector according to the first embodiment of the present invention. Fig. 7 is a front view of the electrical connector shown in Fig. 6. Fig. 8 is a sectional view of the electrical connector along the line BB shown in Fig. 7. Fig. 9 is a top perspective view of the connector. A cylindrical terminal as part of the electrical connector shown in Fig. 6. Fig. 10 is a plan view of a sheet from which the cylindrical terminal shown in Fig. 9 is made. Fig. 11 is a sectional view of the second electrical connector shown in Fig. 1 and the electrical connector according to the first embodiment of the present invention, showing a condition before they are mounted into each other. Fig. 12 is a sectional view of the second electrical connector shown in Fig. 1 and the electrical connector according to the first embodiment of the present invention, showing a condition in which they are inserted into each other. Fig. 13 is a sectional view of the second electrical connector shown in Fig. 1 and the electrical connector according to the first embodiment of the present invention, showing a condition after they have been inserted into each other; . Fig. 14 is a sectional view of the electrical connector according to the first embodiment of the present invention showing a step of the method of manufacturing the electrical connector. Fig. 15 is a bottom perspective view of a cylindrical terminal as part of the electrical connector according to the second embodiment of the present invention. Fig. 16 is a side view of the cylindrical terminal shown in Fig. 15. Fig. 17 is a rear view of the cylindrical terminal shown in Fig. 15. Fig. 18 is a sectional view of a candle connector. conventional incandescent. - Figure 19 is a sectional view of a conventional coaxial connector. [First Embodiment] An electrical connector according to a first embodiment of the present invention is explained below with reference to the drawings. In the description, the term "front" means a side through which the two electrical connectors are inserted into each other, and the term "back" means the opposite side. An electrical connector 20 according to the first embodiment of the present invention, illustrated in FIG. 6, is used with a second electrical connector 10 illustrated in FIG. 1 in order to connect different connectors to a wiring harness. The second electrical connector 10 is firstly explained below with reference to FIGS. 1 to 5. As illustrated in FIGS. 1 to 3, the second electrical connector 10 comprises an outer casing 11 in which the electrical connector 20 is mounted, a plurality of first contact terminals 12 through which the second electrical connector 10 is electrically connected to the electrical connector 20, and a projecting terminal 13. The outer housing 11 is cylindrical.
    [0012] The outer housing 11 consists of a first portion 111 and a second portion 112. The first portion 111 includes a cover portion 111a at a rear end of the outer case 111. The cover portion 111a protects a connector through which cables C are connected to the first contact terminals 12 and the projecting terminal 13. The first part 111 further comprises a first axis 114 defining inside a terminal space R1 in which the projecting terminal 13 is arranged. The first axis 114 extends coaxially with an axis of the outer housing 111. The first axis 114 is designed to have three stages each having a diameter that increases toward a proximal end from a distal end thereof. More specifically, the first axis 114 comprises a front end stage, a median stage, and a rear end stage, the front stage having a larger diameter than the middle stage, and the middle stage having a larger diameter than the rear end stage.
    [0013] The first axis 114 is formed with a guide hole 114a extending axially therefrom to lead to the terminal space. The first portion 111 includes a circumferential wall 111c defining a terminal space R2 between itself and the first axis 111 includes hooks 111d and 111e for preventing the first contact terminals 12 and the projecting terminal 13 housed in the terminal spaces R1 and R2, respectively The first portion 111 also includes a locking member 111f through which the first portion 111 is engaged with the second portion 112.
    [0014] The second portion 112 is cylindrical, and defines a first space 115 between the first axis 114 and itself when connected to the first portion 111. The electrical connector 20 illustrated in Figure 6 is inserted into the first space 115 as well. form.
    [0015] The first space 115 defined by the second portion 112 comprises at an inner surface a plurality of linear grooves 111g disposed circumferentially to the second electrical connector 10 and extending in a longitudinal direction Fi of the second electrical connector 10. The first and second portions 111 and 112 are connected to each other through an annular seal 113. Each of the first contact terminals 12 comprises a U-shaped flat spring 121, a terminal body Hollow 122 having a rectangular section and housed in the terminal space R2, and a connecting section 123 at which the cable C is fixed by being compressed.
    [0016] The first contact terminals 12 are disposed on an outer surface of the first axis 114. The first contact terminals 12 are circumferentially spaced and equal to each other about the first axis 114. More specifically, the first three contact terminals 12 are arranged in the three stages at 120 degrees of circumferential angle of the outer housing 11. The projecting terminal 13 is housed in the terminal space R1 formed at a distal end of the first axis 114, 10 and comes into contact with a later-mentioned cylindrical terminal of the electrical connector 20. As shown in FIG. 4, the projecting terminal 13 comprises a contact portion 131, a terminal body 132, and a connecting portion 133. The contact part 131 comprises a plurality of contact pieces 131e equally spaced from one another, an inner axis portion 131c (see Fig. 5) located in the contact pieces 131a, a pair of C-shaped link members 131b disposed at the distal and proximal ends of the contact pieces 131a, and a tapered portion 131d in the continuity of the link member 131b located at the distal ends of the pieces contact 131e. The terminal body 132 is hollow and has a rectangular cross-section. The terminal body 132 includes a ceiling 132a formed with an opening with which the hook 111e (see Fig. 3) is engaged. The connecting portion 133 compresses the cable C above in order to fix it. The connecting portion 133 includes an insulation passage 133a and a cable passage 133b. Insulation passage 133a includes a pair of protrusions 133t protruding upwardly on sides thereof, and a bottom 133s on which cable C is placed.
    [0017] By bending the protrusions 133t on the cable C placed on the bottom 133s, the cable C is fixed in the insulating passage 133a. The cable passage 133b includes a pair of protrusions 133w protruding upwardly on sides thereof, and a bottom 133v on which the core of the cable C is placed. By folding the projections 133w on the core of the cable C placed on the bottom 133v, the core of the cable C is fixed in the cable passage 133b with the beam which is electrically connected to the cable passage 133b. The projecting terminal 13 is formed from a single sheet. A sheet is first punched in a shape obtained when the projecting terminal 13 is developed in a plane. Figure 5 illustrates a sheet punched in the form. Then, portions of the sheet defining the contact pieces 131a are folded such that they protrude outwardly.
    [0018] Then, the inner axis portion 131c is bent at a proximal portion such that the inner axis portion 131c is above the inner surfaces of the contact pieces 131a. Then, the link members 131b are folded into a C shape such that they surround the inner axis portion 131c. A pair of trapezoidal projections 131f is then folded into a conical shape to thereby define the taper 131d.
    [0019] The contact portion 131 is thus completed. The terminal body 13 is manufactured as follows. First, rectangular projections 132m extending outwardly at distal and proximal ends of the bottom 132b are caused to stand to thereby define sidewalls 132c rising from side edges of the bottom 132b. Then, the projections 132m are bent at distal ends thereof so that they overlap each other. The ceiling 132a is thus formed. The terminal body 132 is thus completed. The link members 131 are bent C-shaped, and the projections 132m are caused to rise to thereby define the side walls 132c, with the result that a deformable portion 134 is formed between the contact portion 131 and the body of the body. The deformable portion 134 has a width that varies or increases from a width equal to a diameter of the connecting member 131b to a width equal to a space between the side walls 132c. The cable C is connected in the connection portion 133 as follows. First, an outer sheath of cable C is removed to expose a core. Then, the cable C is placed on the bottom 133s of the insulating passage 133a, and the exposed core is placed on the bottom 133v of the cable passage 133b. Then, the protrusions 133t of the insulation passage 133e are bent over the cable C, and the protrusions 133w of the cable passage 133b are bent over the core so that the projections 133 are in contact with the beam. The cable C is thus fixed in the connection portion 133 with the cable C which is electrically connected to the connection portion 133. The electrical connector 20 according to the first embodiment of the present invention is explained below, with reference to Figures 6 to 10.
    [0020] As illustrated in FIGS. 6 to 8, the electrical connector 20 comprises an inner housing 21 to be mounted in the second electrical connector 10 illustrated in FIG. 1, a plurality of second contact terminals 22 electrically connecting to the first terminals 12 of the second electrical connector 10 when the electrical connector 20 is mounted in the second electrical connector 10, and a cylindrical terminal 23 electrically connected to the terminal 10 protruding 13 of the second electrical connector when the electrical connector 20 is mounted in the second electrical connector 10. The inner housing 21 includes a circumferential wall 212 as a front half of the inner housing 21. The circumferential wall 212 defines inside a second space 211 in which the first axis 114 of the second electrical connector 10 (see FIG. 1) is mounted. The second space 211 is composed of a plurality of stages each having an inside diameter 20 which gradually decreases from an open end to the rear. The circumferential wall 212 has an outer surface 212a contacting an inner surface of the first space 115 when the electrical connector 20 is mounted in the first space 115 of the second electrical connector 10. The circumferential wall 212 defines at one half before it a cylindrical portion 212 on which no protrusion is formed, and defines at a rear half thereof a pinion portion 212d in which a plurality of linear projections 212c each extending in a longitudinal direction of the electrical connector 20 is circumferentially formed.
    [0021] A second axis 213 extends into the second space 211. The second axis 213 is cylindrical in shape, and comprises the cylindrical terminal 23 disposed therein. The three second contact terminals 22 are arranged on an inner surface of the inner housing 21. Each of the second contact terminals 22 comprises a cylindrical contact portion 221, and a linear contact portion 222. The contact portion 221 comes into contact with the flat spring portion 121 of the first contact terminal 12 illustrated in FIG. 3. Each of the contact portions 221 is housed in each of the three stages of the second space 211. Each of the three contact portions 221 is designed to have a diameter different from each other depending on a diameter of the three stages of the second space 211. The contact portion 222 extends rectilinearly from the contact portion 221 to a rear end of the inner housing 21, and has a distal end located beyond the inner case 21. The contact portion 222 is electrically connected to a printed circuit (not shown) via its distal end. The cylindrical terminal 23 is housed in the second axis 213. The cylindrical terminal 23 has a distal end through which the projecting terminal 13 is inserted therein. The cylindrical terminal 23 extends outwardly beyond the second axis 213, and is thus exposed at a distal end out of the second axis 213. The cylindrical terminal 23 is intended to come into close contact with and be in one piece with the second axis 213. As illustrated in FIG. 9, the cylindrical terminal 23 comprises a cylindrical portion 231, an L-shaped connection portion 233, and a deformable portion 232 via which the cylindrical portion 231 and the connecting portion 233 are connected to each other.
    [0022] The cylindrical portion 231 is formed inside with a plurality of annular projections 231a in a location beyond a location that reaches the inserted projection terminal 13. Each of the annular protrusions 231e projects from an inner wall to an interior space of the cylindrical portion 213. Each of the annular projections 231a acts as a structure to prevent molten resin from flowing into an area at which the cylindrical terminal 23 and the projecting terminal 13 come into contact with each other. the other while an insertion molding process is performed. The cylindrical portion 231 is adapted to be formed with two annular projections 231a disposed in a longitudinal direction thereof. The cylindrical portion 231 includes at an outer surface thereof annular recesses 231b in the same location as a location where the annular projections 231a are formed on an inner surface of the cylindrical portion 231.
    [0023] As illustrated in FIG. 9, the cylindrical portion 231 comprises at a proximal end a rectangular elongated cutout 231c. On the other hand, the cylindrical portion 231 is formed at a circumferential wall with three through holes 231d provided in a longitudinal direction of the cylindrical portion 231. The through holes 231d are exposed on the cutout 231c. The connecting portion 233 comprises a plate-shaped portion 233a bending perpendicular to the cylindrical portion 231, and further, bending perpendicularly to be parallel to the cylindrical portion 231, and a needle portion 233b extending to the outside from a distal end of the plate-shaped portion 233a. The cylindrical terminal 23 is formed from a single sheet. First, a sheet is punched into a shape obtained when the cylindrical terminal 23 is developed in a plane. Figure 10 illustrates the shape. A matrix used for a process of working with the press is then prepared. The die comprises point projections for compressing a first portion 231f defining a portion of the cylindrical portion 231, and a linear projection for compressing a second portion 231g defining the remainder of the cylindrical portion 231. The die is compressed on the sheet on a surface providing an outer surface of the cylindrical portion 231.
    [0024] A ribbing process is then performed by compressing the linear projection of the die on the sheet, with the result that the annular projection 231a is formed on one of the surfaces, and the annular recess 231b is formed on the other surface. The point projections of the die are compressed on the sheet to thereby form the through holes 231d. A bar-shaped die having a circular cross section is then placed on both the first portion 231f and the second portion 231g having a greater width than the first portion 231f. Then, the first and second portions 231f and 231g are rounded around the bar-shaped die. Lateral edges of the first and second portions 231f and 231g are then brought into contact with each other. The cylindrical portion 231 is thus completed. Part of the sheet defining the connecting portion 233 is folded perpendicular to the cylindrical portion 231, and further folded perpendicular to be parallel to the cylindrical portion 231. The connection portion 233 is thus completed. By rounding the first and second parts 231f and 231g, defining the deformable portion 232 between the cylindrical portion 231 and the connecting portion 233. The deformable portion 232 has a width that increases progressively from a curved portion of the cylindrical portion 231 to at a plate portion of the connecting portion 233.
    [0025] The manner in which the electrical connector 10 according to the first embodiment of the present invention having the structure as mentioned above is used is explained below with reference to Figs. 11-14.
    [0026] As illustrated in FIG. 11, the electrical connector 10 and the second electrical connector 20 are brought to be close to each other. Then, the circumferential wall 212 of the inner housing 21 is aligned at a distal end with the first space 115 of the outer housing 11, and the second axis 213 of the inner housing 21 is aligned at a distal end with the hole guide 114a of the first axis 114. The circumferential wall 212 of the inner housing 21 is then advanced in the longitudinal direction F1 of the first space 115, and the second axis 213 of the inner housing 21 is advanced in the longitudinal direction F1 of the guide hole 114a. .
    [0027] The circumferential wall 212 of the inner housing 21 defines at one half before the cylindrical portion 212b on which no protrusion is formed. Therefore, when the circumferential wall 212 is inserted only at a front half in the first space 115 of the outer housing 11, the linear projections 212c are not yet mounted in the linear grooves 111g of the outer housing 11. Thus, a The user can mount the outer housing 21 in the inner housing 11 with one of them rotated about its axis. A user can advance the inner housing 21 relative to the outer housing 11 without checking a direction in which one of the inner housing 21 and the outer housing 11 is rotating.
    [0028] Thus, the electrical connector 20 can be mounted in the second electrical connector 10 without limitation of a direction in which the electrical connector 20 is rotated about its axis with respect to the second electrical connector 10.
    [0029] When the circumferential wall 212 of the inner housing 21 is fully advanced into the first space 115 of the outer housing 11, the linear protrusions 212c of the circumferential wall 212 are mounted in the linear grooves 111g of the outer housing 11. The outer and inner housings 11 and 21 can not therefore rotate relative to each other. On the other hand, when the circumferential wall 212 is fully advanced into the first gap 115, each of the second contact terminals 22 disposed in the electrical connector 20 comes into contact with the flat spring portion 121 of each of the first contact terminals 12 disposed in the second electrical connector 10.
    [0030] Since the outer and inner housings 11 and 21 are prevented from rotating relative to each other with the projection 13 which comes into contact with the cylindrical terminal 23 and further with the second contact terminals which come into contact with the With flat spring portions 121, it is possible to prevent these terminals from rubbing against each other to the extent of being damaged or worn. If an axis of the cylindrical terminal 23 is deflected with respect to an axis of the projecting terminal 13 when the projecting terminal 13 is mounted in the cylindrical terminal 23, a position in which the contact portion 131 of the projecting terminal 13 is inserted into the cylindrical terminal 23 is corrected with the contact portion 131 which slides on an inner surface of the cylindrical terminal 23. However, the projecting terminal 13 is housed in the terminal space R1 with a spacing between the projecting terminal 13 and a surface inner axis of the first axis 114, and is further blocked by the hook 111e. Therefore, even if the position of the contact portion 131 is corrected by the cylindrical terminal 23, the terminal body 132 of the projecting terminal 13 is shifted in a direction in which the position of the contact portion 131 is corrected, and thus, the projecting terminal 13 can be made to move in an axial direction of the cylindrical terminal 23. The projection portion 13 comprises the deformable portion 134 between the contact portion 131 and the terminal body 132. Therefore, when the contact portion 131 is directed in another direction when mounted in the cylindrical terminal 23, the deformable portion 134 is elastically deformed. Therefore, even if the position of the contact portion 131 when the contact portion 131 of the projecting terminal 13 is inserted into the cylindrical terminal 23 is corrected by the cylindrical terminal 23, it is possible to reduce the influence on the terminal body 132 due to the correction. As shown in Fig. 13, when the electrical connector 20 is further inserted into the second electrical connector 10, the circumferential wall 212 of the inner housing 21 advances deep into the first gap 115 of the outer housing 11, the first axis 114 of the housing 11 extends deeply into the second space 211 of the inner housing 21, and the second axis 213 of the inner housing 21 advances deeply into the guide hole 114a of the first axis 114. Thus, each of the first contact terminals 12 disposed on an outer surface of the first axis 114 comes into contact with each of the contact portions 221 of the second contact terminals 22 disposed on an inner surface of the inner case 21. The contact portion 131 of the projecting terminal 13 is in a mounting condition in the cylindrical portion 231 of the cylindrical terminal 23 so as to thereby make contact with the cylindrical portion 231. P since the contact pieces 131a of the contact portion 131 have outwardly facing contact surfaces along the entire circumference of the contact portion 131, the contact portion 131 can make stable contact with an inner surface of the contact portion 131; the cylindrical portion 231. The electrical connector 20 and the second electrical connector 10 are mounted one inside the other as mentioned above. A method of manufacturing the electrical connector 20 is explained below with reference to FIG.
    [0031] First, the second contact terminals 22 and the cylindrical terminal 23 are placed in a matrix (not shown) formed with a cavity through which the inner housing 21 of the electrical connector 20 is to be formed. As a result of the placement of the second contact terminals 22 and the cylindrical terminal 23 in the matrix, the contact portions 222 of the second contact terminals 22 are supported by the matrix, and furthermore, the cylindrical portion 231 of the cylindrical terminal 23 is supported at a distal end by the die. Then, as shown in Fig. 14, a die 30 in the form of a round bar is inserted into the cylindrical terminal 23 through a distal end of the cylindrical terminal 23 in which the projecting terminal 13 (see Fig. 12 ) is inserted later. The die 30 has a diameter smaller than a diameter of an opening of the cylindrical portion 231, and equal to an inner diameter of the annular projections 231e. Upon insertion of the die 30 into the cylindrical portion 231 of the cylindrical terminal 23, since the die 30 has a diameter smaller than a diameter of a distal portion of the cylindrical portion 231, the die 30 can be advanced in the cylindrical portion 231 without any resistance. Since the die 30 is designed to have a diameter equal to an inside diameter of the annular projections 231a, when the die 30 arrives at the first annular projection 231e, the die 30 is subject to resistance caused by slip contact of the matrix 30 with the annular projection 231e. As a result, the die 30 is pushed by a user into the cylindrical portion 231 with a large force. The cylindrical portion 231 in the first embodiment is adapted to include the two annular projections 231a. Thus, the die 30 is inserted into the cylindrical portion 231 until the die 30 arrives at the second annular projection 231a, i.e., the annular projection 231a located deep in the cylindrical portion 231. the die 30 is now in a contact condition with the two annular projections 231a. Then, molten resin is poured into the die cavity with the die 30 which is supported in the aforementioned manner, thereby to form the inner case 21. The molten resin enters the cylindrical portion 23 through a hole. rear end opening (through which the cylindrical portion 231 and the contact portion 233 are connected to each other) of the cylindrical portion 231. The die 30 inserted in the cylindrical portion 231 comes into contact with the projections Thus, the molten resin is prevented from flowing into the cylindrical portion 231 beyond the annular protrusions 231a, thereby closing gaps between the cylindrical terminal 23 and the matrix 30. As a result, the molten resin is prevented from flowing into the cylindrical portion 231 beyond the annular projections 231a. Thus, the molten resin is prevented from flowing in an area at which the cylindrical terminal 23 and the projecting terminal 13 come into contact with each other, providing a space in the cylindrical terminal 23 in which the protruding terminal 13 is inserted while the inner housing 21 is formed. Thus, the inner housing 21 is integrally formed with the second contact terminals 22 and the cylindrical terminal 23 by an insertion molding process.
    [0032] Since the cylindrical portion 231 is formed with the two annular projections 231a, even if the molten resin passes through the first annular projection 231a, the molten resin is stopped by the second annular projection 231a. Thus, the molten resin is reliably prevented from flowing into an area where the cylindrical terminal 23 and the projecting terminal 13 come into contact with each other, providing a space in which the projecting terminal 13 is inserted.
    [0033] The cylindrical portion 231 is formed on an outer surface with the annular recesses 231b by ribbing in alignment with the annular projections 231a. Thus, a contact surface at which the inner housing 21 and the cylindrical terminal 23 come into contact with each other is increased, and the inner housing 21 can have protrusions which come from the molten resin entering the annular recesses 231b. Therefore, when the second electrical connector 10 is removed from the electrical connector 20, it is possible to prevent the cylindrical terminal 23 from being removed from the second axis 213 with the second electrical connector 10. Furthermore, the molten resin does not flow into the cylindrical terminal 23 beyond the annular projections 231a, but flows into the cylindrical terminal 23 in an area which is not beyond the annular projections 231a, i.e. a rear end of the cylindrical terminal 23. The cylindrical portion 231 is formed at a rear end with the through holes 231d. Therefore, since the molten resin enters the through holes 231d, the inner housing 21 can be engaged with the cylindrical terminal 23 through the resin in the through holes 231d. Thus, the cylindrical terminal 23 may have increased resistance to shrinkage, which ensures that it is possible to reliably prevent the cylindrical terminal 23 from being removed. Since the cylindrical portion 231 is formed with the through holes 231d, the molten resin flows into the cylindrical portion 231 not only through a proximal end thereof, but also through the through holes 231d. As a result, the through holes 231d facilitate the flow of the molten resin into the cylindrical portion 231 in an area between a proximal end of the cylindrical portion 231 and the annular protrusions 231a. [Second Embodiment] In the electrical connector 20 according to the first embodiment, the structure for preventing the molten resin from flowing into an area at which the cylindrical terminal 23 and the projecting terminal 13 come into contact. with each other while an insertion molding process is performed consists of the annular projections 231a. In the electrical connector according to the second embodiment, the structure consists of a closed section having a closed proximal end of the cylindrical terminal 23 instead of the annular projections mentioned above 231a. Parts or elements which correspond to those of the first embodiment have the same references, and function in the same manner as corresponding parts or elements in the first embodiment, unless explicitly indicated below. . As illustrated in FIGS. 15-17, a cylindrical terminal 23x is housed in the second axis 213 of the inner housing 21 in a manner similar to the cylindrical terminal 23 in the first embodiment.
    [0034] The cylindrical terminal 23x includes a cylindrical portion 231x formed with the single annular projection 231a beyond a location at which the projecting terminal 13 arrives. In a similar manner to the first embodiment, the annular projection 231a prevents molten resin from flowing into an area where the cylindrical terminal 23 and the projecting terminal 13 come into contact with each other. other while an insert molding process is performed. The cylindrical portion 231x is further formed on an outer surface with the annular recess 231b in alignment with the annular projection 231a. The cylindrical terminal 23x includes a reduced thickness portion 234 at the rear of the cylindrical portion 231x. The reduced thickness portion 234 is formed by progressively reducing a thickness of the cylindrical portion 231x in a longitudinal direction of the cylindrical portion 231x, i.e. progressively reducing a diameter of the cylindrical portion 231x in a horizontal direction A2 with a diameter of the cylindrical portion 231x in a vertical direction A1 perpendicular to the direction A2 which is maintained as it is. The reduced thickness portion 234 is flat as a whole.
    [0035] The cylindrical terminal 23x further comprises a closed section 235 at the rear of the reduced thickness portion 234 and at a proximal end of the cylindrical terminal 23x. The closed section 235 has a width (a length in the Al direction) larger than that of the reduced thickness portion 234. As shown in Fig. 17, the closed section 235 has a thickness smaller than a diameter. of the cylindrical portion 231x and a width greater than a diameter of the cylindrical portion 231x.
    [0036] The cylindrical terminal 23x further comprises an L-shaped connection portion 233x in the continuity of the closed section 235. The connecting portion 233x comprises a plate-shaped portion 233a folding perpendicular to the closed section 235, and folding further perpendicularly to be parallel to the cylindrical portion 231x, and a needle portion 233b extending outwardly from a distal end of the plate-shaped portion 233a.
    [0037] The cylindrical terminal 23x is formed from a single sheet. First, a sheet is punched into a shape obtained when the cylindrical terminal 23x is developed in a plane.
    [0038] Next, a matrix used for a press work process, and comprising a linear projection, is prepared. The die is compressed on a rectangular portion of the sheet defining an outer surface of the cylindrical portion 231x, the reduced thickness portion 234, and the closed section 235. Performing a ribbing process, i.e. compressing the linear protrusion of the die on the sheet, the annular projection 231a is formed on one of the surfaces of the sheet, and the annular recess 231b is formed on the other surface of the sheet. Next, a bar-shaped die having a circular cross-section is placed on the ribbed sheet. Then, the sheet is rounded around the bar, and the side edges of the rounded sheet are then brought into contact with each other. Thus, the sheet is transformed into a metal cylinder having a uniform diameter and defining in one piece the cylindrical portion 231x, and the reduced thickness portion 234 before crushing, and the closed section 235 prior to crushing. Then, a part of the sheet defining the closed section 235 is clamped vertically so as to be crushed. By being crushed, the closed section 235 is transformed from a cylindrical shape to a flat shape, with the result that the closed section 235 is enlarged in a direction perpendicular to a direction in which the closed section 235 is crushed, and therefore the closed section 235 has no interior space. The reduced thickness portion 234 is compressed with the closed section 235 in a direction in which the closed section 235 is compressed, when the closed section 235 is crushed into a flat shape.
    [0039] According to the steps mentioned above, the cylindrical portion 231x, the reduced thickness portion 234, and the closed section 235 of the cylindrical terminal 23x are formed from a single sheet. Part of the sheet defining the connecting portion 233 is folded perpendicularly to the cylindrical portion 231x, and further folded perpendicular to be parallel to the cylindrical portion 231x. The connection portion 233 is thus completed. In a similar manner to the first embodiment, the second contact terminals 22 and the cylindrical terminal 23x are placed in a matrix (not shown) formed with a cavity through which the inner housing 21 of the electrical connector 20 is to be formed by an insertion molding process.
    [0040] As a result of the placement of the second contact terminals 22 and the cylindrical terminal 23x in the matrix, the contact portions 222 of the second contact terminals 22 are supported with the matrix, and the cylindrical portion 231x of the cylindrical terminal 23x is further supported at a distal end with the matrix. Then, molten resin is poured into the cavity. The closed section 235 is formed at a proximal end opposite a distal end of the cylindrical terminal 23x through which the projecting terminal 13 (see Fig. 4) is inserted into the cylindrical terminal 23x, and thus the cylindrical terminal 23x is closed at a proximal end. The closed section 235 thus prevents molten resin from flowing into an interior space of the cylindrical terminal 23x through a proximal end of the cylindrical terminal 23x, and therefore, it is possible to prevent molten resin from forming. flow in an area at which the cylindrical terminal 23x and the projecting terminal 13 come into contact with each other while the insertion molding process is performed. Since the closed section 235 can be formed by a press work process, the cylindrical terminal 23x can easily be closed at a proximal end. In the first and second embodiments, the terminals 23 and 23x are designed to be cylindrical, i.e. to have a circular cross section. It should be noted that if only the contact pieces 131a of the projecting terminal 13 can come into contact with an inner surface of the terminals 23 and 23x, the terminals 23 and 23x may be designed to have a rectangular cross-section.
    [0041] The cylindrical terminal 23 (see Fig. 9) in the first embodiment is adapted to include the two annular projections 231a. It should be noted that the cylindrical terminal 23 may be designed to include three or more annular projections 231a.
    [0042] The cylindrical terminal 23x (see Fig. 15) in the second embodiment is adapted to include the single annular projection 231a. It should be noted that the 23x cylindrical terminal can be designed to include two or more annular projections 231a. INDUSTRIAL APPLICATION The electrical connector according to the present invention can be used as a connector provided in an incandescent candle, a connector for connecting a combustion pressure sensor and a wiring harness to each other, a connector for connect cables to each other, a connector provided in various electrical / electronic devices, and a connector provided in an automobile. The electrical connector according to the present invention can be widely used in fields such as the electrical / electronic industry and the automotive industry.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. An electrical connector (20), characterized by comprising: a housing (21) configured to be mounted in a second electrical connector (10); and a cylindrical hollow terminal (23, 23x) configured to engage a projecting terminal (13) disposed in the second electrical connector (10) when the projecting terminal (13) is inserted into the cylindrical hollow terminal (23, 23x) , the housing (21) and the cylindrical hollow terminal (23, 23x) being formed integrally with each other by an insertion molding process, the cylindrical hollow terminal (23, 23x) being formed with a structure (231a, 235) for preventing molten resin for the insertion molding process from flowing into an area where the cylindrical hollow terminal (23, 23x) and the projecting terminal (13) come into contact. contact with each other while the insertion molding process is performed.
    [0002]
    Electrical connector (20) according to claim 1, characterized in that the structure (231a) consists of a protrusion (231a) protruding from an inner wall 25 towards an interior space of the hollow cylindrical terminal (23, 23x).
    [0003]
    3. Electrical connector (20) according to claim 2, characterized in that the projection (231a) is annular. 30
    [0004]
    4. An electrical connector (20) according to claim 2 or 3, characterized in that the hollow cylindrical terminal (23, 23x) comprises on an outer wall a recess (231b) in the same location as the projection (231a).
    [0005]
    An electrical connector (20) according to any one of claims 2 to 4, characterized in that a plurality of projections (231a) is formed in a longitudinal direction of the cylindrical hollow terminal (23, 23x).
    [0006]
    6. Electrical connector (20) according to any one of claims 2 to 5, characterized in that the hollow cylindrical terminal (23, 23x) is formed at a circumferential wall with at least one through hole (231d) between a proximal end of the cylindrical hollow terminal (23, 23x) and the projection (231a).
    [0007]
    7. The electrical connector (20) according to claim 1, characterized in that the structure (235) consists of a closed section (235) having a closed proximal end of the cylindrical hollow terminal (23, 23x), the closed section (235) having a thickness smaller than a diameter of the cylindrical hollow terminal (23, 23x) and a width greater than a diameter of the cylindrical hollow terminal (23, 23x).
    [0008]
    8. Electrical connector (20) according to claim 7, characterized in that the closed section (235) is formed by a process of working with the press.
    [0009]
    9. A method of manufacturing an electrical connector (20), characterized in that it comprises the fact of: inserting a bar (30) in a hollow cylindrical terminal (23) to thereby cause the bar (30) to come encontact with a protrusion (231a), the cylindrical hollow terminal (23) coming into contact with a projecting terminal (13) disposed in a second electrical connector (10) when the projecting terminal (13) is inserted into the cylindrical hollow terminal (23) and having an annular projection (231a) protruding from an inner wall to an interior space of the hollow cylindrical terminal (23), the hollow cylindrical terminal (23) preventing molten resin for an insert molding process. flowing in an area where the cylindrical hollow terminal (23) and the projecting terminal (13) come into contact with each other while the insertion molding process is performed; and performing an insertion molding process to form a housing (21) to be mounted in the second electrical connector (10) and the cylindrical hollow terminal (23) integral with each other.
    [0010]
    10. A method of manufacturing an electrical connector 20 (20), characterized in that it comprises the fact of: preparing a cylindrical hollow terminal (23x) coming into contact with a projecting terminal (13) disposed in a second electrical connector (10) when the projecting terminal (13) is inserted into the hollow cylindrical terminal (23x), and having a closed section (235) having a proximal end closed opposite a distal end in which the projecting terminal ( 13) is inserted; and performing an insertion molding process 30 to form a housing (21) to be mounted in the second electrical connector (10) and the cylindrical hollow terminal (23x) integral with each other.
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    同族专利:
    公开号 | 公开日
    KR20160056796A|2016-05-20|
    CN105591229B|2018-01-16|
    DE102015221828A1|2016-05-12|
    FR3028357B1|2019-09-13|
    US20160134066A1|2016-05-12|
    CN105591229A|2016-05-18|
    US9762006B2|2017-09-12|
    KR101725378B1|2017-04-10|
    DE102015221828B4|2017-02-09|
    JP5861763B1|2016-02-16|
    JP2016095946A|2016-05-26|
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    法律状态:
    2016-10-13| PLFP| Fee payment|Year of fee payment: 2 |
    2017-10-11| PLFP| Fee payment|Year of fee payment: 3 |
    2018-02-09| PLSC| Search report ready|Effective date: 20180209 |
    2018-10-05| PLFP| Fee payment|Year of fee payment: 4 |
    2019-11-04| PLFP| Fee payment|Year of fee payment: 5 |
    2021-08-06| ST| Notification of lapse|Effective date: 20210705 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014230098A|JP5861763B1|2014-11-12|2014-11-12|Electrical connector and manufacturing method thereof|
    JP2014230098|2014-11-12|
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