• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Provided is a temperature probe (1) comprising a thermistor having a thermosensitive element connected to two electrically conductive output wires, two electrically conductive metal blades having proximal end portions welded to the respective output leads. and supporting said thermosensitive element at a distance from said proximal end portions, and a plunger (5) made of a plastic material molded by injection at least around the proximal end portions of the blades, lead wires and the element heat-sensitive, said plunger having an end portion (50) overmolded directly around the thermosensitive member, said thermosensitive member being wrapped only by said plunger. The present invention finds application in the field of measuring the temperature of a circulating fluid within a combustion engine.
    公开号:FR3035212A1
    申请号:FR1553224
    申请日:2015-04-14
    公开日:2016-10-21
    发明作者:Hammouda Chokri Ben
    申请人:MGI Coutier SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a temperature probe, as well as to a method of manufacturing such a temperature probe. The invention finds a preferred, but not exclusive, application in the field of measuring the temperature of a circulating fluid within a combustion engine, in particular in a fuel supply circuit, a fuel system cooling or an air intake circuit. In a conventional manner, a temperature probe comprises a thermistor provided with a thermosensitive element connected to two electrically conductive output wires; this thermosensitive element being of the type 10 electrical resistance sensitive to temperature, generally surrounded by a coating layer often epoxy or glass according to the technology of the electrical resistance which is either of the type CTN (Negative Temperature Coefficient) or of the type CTP (Positive Temperature Coefficient). To protect the thermosensitive element against the aggression of the fluid, it is known not to put the thermosensitive element directly in contact with the fluid, but to cover it with a protective sheath, sometimes called a plunger; this sheath being filled with a thermal coating paste in order to immobilize the thermistor and fill the voids between the heat-sensitive element and the wall of the sheath. However, the operation of laying or casting the thermal paste proves tedious and expensive. In addition, with such a solution, the reduction of the response time is not optimal because of the extra thicknesses around and above the thermosensitive element induced by the presence of thermal paste combined with the thickness of the sheath, and more specifically, response times of between 10 and 11 seconds are generally observed which are judged unsatisfactory by the Applicant. The present invention aims to solve all or part of the aforementioned drawbacks, and in particular to provide a temperature sensor with reduced response times, less than 10 seconds. For this purpose, it proposes a temperature probe comprising a thermistor provided with a thermosensitive element connected to two electrically conductive output wires, said probe being remarkable in that it comprises two electrically conductive metal blades having end portions. proximal portions welded to the respective lead wires and supporting the thermosensitive member at a distance from the proximal end portions, and further comprising a plunger body made of plastic material molded by injection at least around proximal end portions of the blades, lead wires and thermosensitive member, said plunger having an end portion overmolded directly around the thermosensitive member, said thermosensitive member being wrapped only by said plunger. Thus, by keeping the thermosensitive element away from the blades, this thermosensitive element is released from any external element all around it, with the exception of the only two output wires, and the plunger body encapsulates this heat-sensitive element by overmolding. all around it (at its end, on its periphery and between the output wires coming out of the thermosensitive element). Finally, in the probe, only the overmolded plunger protects the thermosensitive element, without the use of a thermal paste and an additional sheath. In addition, the solder connection between the lead wires and the metal blades is provided to provide resistant connections, both in temperature and pressure, to the injection conditions within a mold to form the body. diver. Thanks to the invention, it is therefore easy to reduce the response time by optimizing the thickness of the end portion of the plunger body. Advantageously, the end portion of the plunger body has a maximum thickness of overmoulding of between 0.2 and 1.5 millimeters, and especially between 0.4 and 1.0 millimeters. In other words, the thickness of overmolding around the thermosensitive element will not exceed this maximum thickness, thus offering a particularly short response time compared to the response times conventionally observed, and in particular a response time of less than 10 seconds, in particular. particular of the order of 5 to 7 seconds. According to one feature, the plunger body has two wrapping portions extending the end portion and overmolded at least partially around the respective output wires, said plunger body having a through central slot extending between said wrapping portions. In this way, by virtue of this conformation of the plunger body with a central slot, the fluid fills the central slot and thus passes over the thermosensitive element, thus further increasing the sensitivity of the measurement of the fluid temperature by the thermosensitive element and thus reducing the response time again. According to another feature, the two blades have distal end portions adapted to be connected to a meter and intermediate portions extending between the proximal and distal end portions, and the probe further comprises a binding body made of a plastic material overmolded by injection at least partially around the intermediate portions of the blades, the distal end portions not being overmolded by said connecting body and left free to allow connection with the apparatus of measured. Thus, a second body, namely the connecting body, provides protection of the probe at the top, also with the function of fixing on a support and wiring the measuring device on the portions of the body. distal ends of the blades. In addition, this connecting body allows to keep in place the two blades before overmolding by the plunger. In a first embodiment, the plunger body and the connecting body are two separate bodies made by bi-injection, and the plunger body has a covering portion which partially overmoulds the connecting body, the overmolding of said plunger body being performed after overmolding said connecting body. Thus, the connecting body is made first, then the plunger body is made second, preferably by a method of biinjection of two plastics within an injection mold. Advantageously, the cover portion is located at least partly above at least one seal groove on the plunger body, wherein the or each seal groove is adapted to receive an O-ring seal. In this way, the overlap portion between the two bodies is made so as to avoid any leakage problem; the O-ring being located upstream of the cover portion so as to avoid any risk of penetration of the circulating fluid at the junction between the two injected materials. For functional constraints, it may sometimes be justified to use two seals, so two seal grooves, to ensure the tightness and durability of the connection of the probe with its receptacle. In a particular embodiment, the plastic material of the plunger is different from the plastic material of the connecting body. Indeed, the requirements are not the same for the two bodies, the plunger body and the connecting body, because the plunger principally has the function of protecting the thermosensitive element while offering a high thermal conductivity for an optimal measurement. , while the main purpose of the connecting body is to anchor the probe on a support. According to a possibility of the invention, the plastic material of the plunger body has a higher thermal conductivity than the plastic material of the connecting body. In a second embodiment, the plunger and the connecting body are made in one piece in the same plastic material by mono-injection. Thus, the connecting body and the plunger are made together by a method of mono-injection of the same plastic material within an injection mold. According to another possibility of the invention, the output wires of the thermistor are connected by electrical or ultrasonic welding directly to the blades. Electrical or ultrasonic welding is particularly advantageous for withstanding temperature and pressure conditions when injecting plastics material (s) into a mold. The invention also relates to a method of manufacturing a probe 20 according to the invention, comprising the following steps: - supply of a thermistor provided with a thermosensitive element connected to two electrically conductive output wires, - supply two electrically conductive metal blades having proximal end portions; Welding the thermistor output leads to the proximal end portions of the respective blades; - Realizing a plunger body by injection molding in a mold, in a first plastic material, at least around the proximal end portions of the blades, the output wires and the heat-sensitive element, so that said plunger body has an end portion overmolded directly around the thermosensitive member, and said thermosensitive member is wrapped only by said plunger body. Thus, in a situation, the thermosensitive element is nowhere in contact with the conveyed fluid whose probe measures the temperature. In a first embodiment with bi-injection, the two blades are initially joined by a transverse connecting element, and the method comprises the following steps: welding connection of the thermistor output wires to the proximal end portions respective blades which extend under the transverse element, said transverse element connecting the two blades during this connection of the output wires; before the overmoulding of the plunger body, the production of a connecting body by the overmolding by injection into the mold, in a plastic material, around the parts of the blades which extend above the transverse element, said blades having portions of distal ends not overmolded by said connecting body and left free to allow connection with a measuring apparatus, the transverse element not being overmoulded and connecting the two blades during overmolding by the body of Linkage; - Realization of the plunger body by partial overmolding of the connecting body, parts of the blades not overmolded by the connecting body, the son of output and the thermistor. Thus, the transverse element will keep the two blades apart during the connection of the output wires and during the production of the connecting body. According to one possibility, before the step of producing the plunger body and after the step of producing the connecting body, the method comprises a step of removing the transverse element between the two blades. If this transverse element is made of electrically conductive material, and if more specifically this transverse element is a metallic element coming from material with the two blades to form a single metal part, then this transverse element will be removed (to avoid a short circuit). in use) before the embodiment of the plunger body, since the connecting body has taken over to keep apart the two blades. In a second embodiment, the two blades are initially joined by a support piece made of electrically insulating material, said support piece now spaced apart and in place the two blades inside the mold. This support piece thus forms a connecting piece attached between the two blades and made of electrically insulating material. In the case of a bi-injection, it may be envisaged for this support piece, in particular, to use a material that melts all or part during the injection. Thus, in the case of a bi-injection, during the molding step of the plunger body, the support part enters, all or part, in fusion. In the case of a mono-injection, it is necessary that this support part ensures a permanent support during the injection and then it will be envisaged for this support piece to use a material sufficiently strong to withstand the conditions of injection in the mold, and the support piece can be left in place. Thus, in the case of a mono-injection, the method comprises the following steps: welding connection of the thermistor output wires to the proximal end portions of the respective blades which extend under the support piece; 15 - embodiment by overmoulding of the plunger body and a connecting body according to a method of mono-injection of a plastic material inside an injection mold, said connecting body being overmolded around the piece of support and portions of the blades which extend above the leads, said blades having portions of distal ends not overmolded by said connecting body and left free to allow connection with a measuring device, so that the plunger body and the connecting body are made in one piece in the same plastic material. Other features and advantages of the present invention will appear on reading the following detailed description of two nonlimiting exemplary embodiments, with reference to the appended figures in which: FIGS. schematic views in perspective of the temperature probe at different stages of its manufacture according to a first manufacturing method; and FIGS. 2a to 2c are schematic perspective views of the temperature probe at different stages of its manufacture according to a second manufacturing method. With reference to FIGS. 1a-1e, according to a first method of manufacturing a probe 1 according to the invention implementing an overmolding according to a bi-injection method, the following steps are described below; the final probe 1 being visible in Figure 1 e. In a first step visible in FIG. 1a, a conductive part 2 made of electrically conductive material, and in particular made of metal, made in one piece and having two blades 21 connected transversely by a transverse element 22 forming a bridge is provided. between the two blades 21. Thus, the conductive part 2 has a general shape in "H". Each blade 21 has a proximal end portion 210 and a distal end portion 211 opposite, and an intermediate portion 212 extending between the proximal end portions 210 and distal 211. Optionally, each blade 21 has a 90 ° curvature, so that the distal end portions 211 are 90 ° inclined relative to the proximal end portions 210. The transverse member 22 is located on the intermediate portions 212 of the blades 21, plus close to the proximal end portions 210 as distal end portions 211. The transverse member 22 keeps the two blades 21 at a distance from one another. In a second step visible in FIG. 1b, the conductive part is placed in an injection mold (not shown), and a linking body 3 is made by overmoulding, in a plastic material called a second plastic material, around portions of the blades 21 which extend above the transverse member 22, ie around the portions of the intermediate portions 212 of the blades 21 which are between the transverse member 22 and the distal end portions 211. This first overmolding takes place in the injection mold.
    [0002] In this second step, the distal end portions 211 are not overmolded by the connecting body 3 and are left free to allow connection with a measuring device (not shown). The connecting body 3 has an upper interface 30 provided with a bottom 300 from which protrudes the distal end portions 211 and a peripheral wall 301 surrounding these distal end portions 211. Thus, this upper interface 30 and the portions of distal ends 211 to bare form a male connection socket adapted to cooperate a female connection socket of complementary shape, for connection with an external measuring device.
    [0003] The connecting body 3 has a lower sleeve 31 which partially encloses the intermediate portions 212 of the blades 21, above the transverse element 22. In this second step, the transverse element 22 is not either overmolded by the connecting body 3 and remains exposed in place to connect the two blades 21 during this overmolding by the connecting body 3.
    [0004] The connecting body 3 has an anchoring portion 32, located between the upper interface 30 and the lower sleeve 31, and which serves to fix or anchor the probe 1 on a support (not shown). For this purpose, this anchoring portion 32 has fastening elements, in particular by snapping or screwing, designed to cooperate with complementary fastening elements 10 carried by the support. In a third step visible in FIG. 1c, the transverse element 22 is removed, in particular by cutting, sawing, or cutting it, and the two output wires 41 of a thermistor 4 are connected to the proximal end portions. 210 respective blades 21.
    [0005] The thermistor 4 is provided with a thermosensitive element 40 connected to two electrically conductive output wires 41. This thermosensitive element 40 is of the temperature-sensitive electrical resistance type, of the CTN (Negative Temperature Coefficient) type or of the CTP (Positive Temperature Coefficient) type, and this electrical resistance is surrounded by a coating layer, for example epoxy or glass. The output leads 41 of the thermistor 4 are connected by electrical or ultrasonic welding directly to the blades 21, by means of two electric or ultrasonic welding points, with an output wire weld point 41.
    [0006] Thus, the blades 21 support the output wires 41 and therefore the thermosensitive element 40 which is remotely borne, cantilevered, proximal end portions 210. In a fourth step visible in Figure 1d , a plunger 5 is formed by overmolding, in a plastic material called the first plastic material, around the proximal end portions 21 of the blades 2, the output wires 41 and the heat-sensitive element 40. At the end of this fourth step, the blades 21 are completely overmolded by the plunger 5 and the connecting body 3, with the exception of the distal end portions 211 of the blades 21 which remain exposed for electrical connection with the external measuring device. This second molding advantageously takes place in the same injection mold as that used in the first overmolding with the connecting body 3. The plunger body 5 has an end portion 50 overmolded directly around the thermosensitive element. 40, which surrounds the thermosensitive element 40 on the underside, on its periphery or periphery and on the top. Only the plunger 5 envelops the thermosensitive element 40. This end portion 50 has a maximum overmolding thickness of between 0.2 and 1.5 millimeters, and preferably between 0.4 and 1.0 millimeters. By way of example, this end portion 50 has a maximum thickness between 0.5 and 0.8 millimeters. This end portion 50 has a substantially hemispherical general shape, in order to fit closely the thermosensitive element 40. The plunger 5 also has two wrapping portions 51 extending the end portion 50 and overmolded at least partially around the two respective output wires 41; a central slot 52 extending between these two wrapping parts 51, above the end portion 50. The plunger body 5 also has a sleeve-shaped covering portion 53, which partially overmoulds the body 3, and more specifically that overmolding the lower sleeve 31 of the connecting body 3. This covering portion 53 is located above a peripheral groove 54, called joint groove. In a fifth step visible in FIG. 1 e, an O-ring 6 is placed inside the peripheral groove 54.
    [0007] The following description relates to a variant of the first method described above, also implementing an overmolding according to a bi-injection method; only the order of the steps being different. The first step is identical to the first step of the first method described with reference to Figure 1a, and therefore consists in providing the conductive part 2 already described. In a second step, the two output wires 41 of the thermistor 4 are connected to the respective proximal end portions 210 of the blades 21. This connection step has been described above, recalling that the output wires 41 of The thermistor 4 is connected by electrical or ultrasonic welding directly to the blades 21. Thus, the blades 21 support the output wires 41 and therefore the thermosensitive element 40 which is remotely located, worn as a door-to-door. false, portions of proximal ends 210. The third step is identical to the second step of the first method described with reference to Figure 1b, and therefore consists in making by overmolding the connecting body 3 already described. In a fourth step, the transverse element 22 is removed, as already described above. The fifth step is identical to the fourth step of the first method described with reference to FIG. 1 d, and thus consists of molding the plunger 5 already described. The sixth step is identical to the fifth step of the first method described with reference to FIG. 1 e, and thus consists in arranging the O-ring 6. The probe 1 obtained with the first method is identical to that obtained with its variant. With reference to FIGS. 2a to 2c, according to a second method of manufacturing a probe 1 according to the invention implementing overmolding according to a mono-injection method, the following steps are described below; the final probe 1 being visible in Figures 2b and 2c. Figure 2a illustrates the probe during injection (the mold not being visible), and Figures 2b and 2c illustrate the probe at the end of the injection. In FIG. 2c, the overmoulding is shown in transparency in order to visualize the inside of the probe, and in particular the thermistor 4 and the blades 21. The second method essentially differs from the first method in that the plunger 5 and the connecting body 3 are made in one piece in the same plastic material according to a mono-injection method in a mold. The same numerical references will be used to describe this second method and the constituent elements of the probe 1 obtained by this second method.
    [0008] In a first step, two blades 21 of electrically conductive material, and in particular metal, are provided. These blades 21 are identical to those described above for the first method. The blades 21 are not here connected by a transverse element 22 metal. In a second step, the two output wires 41 of a thermistor 4 are connected to the respective proximal end portions 210 of the blades 21. This step is identical to that described above for the first method, recalling that the output leads 41 of the thermistor 4 are connected by electric or ultrasonic welding directly to the blades 21. In a third optional step, the two blades 21 are mounted on a support piece 7 (visible by transparency on the Figure 2c) made of electrically insulating material, in particular plastic. As such, the support piece 7 may have two slots for receiving the blades 21. This support piece 7 has the purpose of keeping apart and in place the two blades 21 inside the injection mold. The support piece 7 is preferably placed on the intermediate portions 212 of the blades 21, above the welding points. The second and third steps can be reversed. In a fourth step, the two blades 21 supported by the support piece 7 and welded to the output wires 41 of the thermistor 4 are placed inside an injection mold. In a fifth step, retractable pins 8 (visible in Figure 2a) which come to hold the proximal end portions 210 of the blades 21 to protect them during overmolding by injection into the mold, and in particular to prevent a break of the weld points.
    [0009] Optionally, these pins 8 can also be used to hold the thermistor 4 and / or its output leads 41. The pins 8 contribute to keeping the assembly in place so as to control the thickness of the plastic covering the thermistor 4, the output son 41 and blades 21, which should be neither too important not to penalize the response time of the probe, 25 nor too low to ensure its robustness over time. These pins 8 are retractable to the extent that they are movable between an extended position in which the pins 8 hold the proximal end portions 210 of the blades 21, and a retracted position in which the pins 8 are moved away from the blades 21 to leave the Place 30 in the plastic material which molds the blades 21. In a sixth step, a plunger 5 and the connecting body 3 are formed by overmoulding, in a plastic material, intermediate portions 212 of the blades 21, portions of proximal ends 21 of the blades 2, the output son 41 and the thermosensitive element 40. The plunger body 5 and the connecting body 3 are identical to those of the probe 1 obtained according to the first method, and already described, to the difference that this time the plunger body 5 and the connecting body 3 are made in one piece in the same plastic material, and advantageously in a single injection sequence. ection. In this sixth step, the pins 8 are retracted at a convenient time chosen so that the plastic material does not congeal around the pins 8, the injection of the plastic preferably starting at the connecting body 3 for terminate at the end portion 50 of the plunger body 5. The probe 1 obtained according to the first method or the second method has several advantages. No thermal paste is used to protect the thermosensitive element 40, only the plunger 5 providing this protective function, with a reduced thickness which guarantees a reduced response time of less than 10 seconds.
    [0010] An electrical or ultrasonic weld is particularly advantageous because it makes it possible to have soldering points which withstand the temperatures and the injection pressures of the plastic material during the production of the plunger body 5 by overmolding. On the other hand, it is advantageous to employ a thermally sensitive element whose electrical resistance is surrounded by a layer of glass coating, rather than epoxy. Indeed, the glass has a temperature resistance greater than the epoxy, which is advantageous for withstanding the injection temperatures of the plastic material. The other materials of the thermistor will also be selected to withstand the temperatures and injection pressures. For example, for the internal welds to the thermistor, it may be advantageous to use lead solder with a melting point of 327.5 ° C. In the particular case of the first method, thanks to the transverse element 22, the two blades 21 are held in place in the mold, during the production of the connecting body 3 by overmolding with the second plastic material, then this transverse element 22 is broken directly in the mold before the embodiment of the plunger 5 by overmolding with the first plastic material. It is preferable that the plastic material used for the plunger body 3 has a good thermal conductivity, typically greater than or equal to 1 W / m.sup.-2 K, and in particular between 1 and 3 W / m.sup.-K. to offer a reduced response time. In the particular case of the first method, it is conceivable, on the other hand, that the second plastic material has a low thermal conductivity, typically less than 1 W / m. It is also important that the first and second plastic materials have a low electrical conductivity, or even be electrically insulating materials, to avoid short-circuiting the two blades 21, such as for example having a volume resistivity greater than 106 10 ohm.cm . Indeed, the first and second plastic materials will, during overmolding steps, insert and fill the voids between the blades 21. Concerning the plastic materials used, the latter may be of the thermoplastic type, such as for example a polyamide material or polybutylene terephthalate, or elastomeric or silicone type.
    [0011] These plastic materials may or may not be loaded with thermally conductive fillers, in particular glass or ceramic. It is also possible to envisage a post-molding treatment applied on the surface of the plunger body 5, such as for example a NiCu or ceramic coating, to increase the thermal conductivity and thus to reduce the response time of the probe 1. the invention, the number of components of the probe 1 is reduced to three, with an electrically conductive assembly formed of the two blades 21, a thermistor 4 and a protective assembly formed of the two bodies 3, 5 overmolded in two stages from the same mold. In addition, the manufacturing process does not require a thermal paste removal step sometimes used to fill a thermowell in which the thermistor is housed to reduce the response time of the probe, thereby reducing the duration. , the complexity of the manufacturing process and the risks of pollution. 30
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. Temperature probe (1), in particular for measuring the temperature of a fluid circulating in a combustion engine, said probe (1) comprising a thermistor (4) provided with a thermosensitive element (40) connected with two electrically conductive output wires (41), said probe (1) being characterized in that it comprises two electrically conductive metal blades (21) having proximal end portions (210) connected by welding to the output leads ( 41) and supporting said heat-sensitive element (40) away from said proximal end portions (210), and further comprising a plunger (5) made of a plastic material molded by injection at least around the portions of proximal ends (210) of the blades (21), the output wires (41) and the thermosensitive element (40), said plunger (5) having an end portion (50) overmolded directly on all r of the thermosensitive element (40), said thermosensitive element (40) being enveloped only by said plunger (5).
    [0002]
    2. Probe (1) according to claim 1, wherein the end portion (50) of the plunger (5) has a maximum overmolding thickness of between 0.2 and 1.5 millimeters, and especially between 0.4 and 1.0 millimeter.
    [0003]
    3. Probe (1) according to claims 1 or 2, wherein the plastic material of the plunger (5) has a thermal conductivity greater than or equal to 1 W / m ° K, and in particular between 1 and 3 W / m. . ° K.
    [0004]
    4. Probe (1) according to any preceding claim, wherein the plunger (5) has two wrapping portions (51) extending the end portion (50) and overmolded at least partially around the son of respective outlet (41), said plunger (5) having a central slot (52) therethrough extending between said wrapping portions (51). 3035212 15
    [0005]
    5. Probe (1) according to any one of the preceding claims, wherein the two blades (21) have distal end portions (211) adapted to be connected to a measuring apparatus and intermediate portions (212) s extending between the proximal (210) and distal (211) end portions, and the probe (1) further comprises a connecting body (3) made of a plastic material molded by injection at least partially around the intermediate portions (212) blades (21), the distal end portions (211) not overmolded by said connecting body (3) and left free to allow connection with the meter.
    [0006]
    6. Probe (1) according to claim 5, wherein the plunger body (5) and the connecting body (3) are two separate bodies made by biinjection, and the plunger body (5) has a covering portion (53). 15 which partially molds the connecting body (3), overmolding by said plunger (5) being performed after overmolding by said connecting body (3).
    [0007]
    The probe (1) according to claim 6, wherein the cover portion (53) is located at least partly above at least one seal groove (54) on the plunger (5), the or each seal groove (54) being provided to receive an O-ring seal (6).
    [0008]
    The probe (1) according to claim 6 or 7, wherein the plastic material of the plunger (5) is different from the plastic material of the connecting body (3).
    [0009]
    9. Probe (1) according to claim 8, wherein the plastic material of the plunger (5) has a higher thermal conductivity than the plastic material of the connecting body (3). 30
    [0010]
    10. Probe (1) according to claim 5, wherein the plunger body (5) and the connecting body (3) are made in one piece in the same plastic material by mono-injection. 3035212 16
    [0011]
    11. Probe (1) according to any one of the preceding claims, wherein the output son (41) of the thermistor (4) are connected by electrical or ultrasonic welding directly on the blades (21). 5
    [0012]
    12. A method of manufacturing a probe (1) according to any one of the preceding claims, comprising the following steps: - providing a thermistor (4) provided with a thermosensitive element (40) connected to two son of electrically conductive outlet (41); - providing two electrically conductive metal blades (21) having proximal end portions (210); - solder connection of the output leads (41) of the thermistor (4) to the proximal end portions (210) of the respective blades (21); - Realization of a plunger body (5) by overmolding by injection into a mold, in a plastic material, at least around the proximal end portions (210) of the blades (21), the output leads (41) and the thermosensitive element (40), so that said plunger (5) has an end portion (50) overmolded directly around the thermosensitive element (40), and said thermosensitive element (40) is wrapped only by said plunger (5). 20
    [0013]
    13. Manufacturing method according to claim 12, wherein the two blades (21) are initially joined by a transverse element (22) connecting, and the method comprises the following steps: - solder connection of the leads (41) from the thermistor (4) to the proximal end portions (210) of the respective blades (21) which extend under the transverse member (22), said transverse member (22) connecting the two blades (21) during this connecting the output leads (41); before the overmoulding of the plunger body (5), the production of a connecting body (3) by the overmolding by injection into the mold, in a plastic material, around the parts of the blades (21) which extend above the transverse element (22), said blades (21) having distal end portions (211) not overmolded by said connecting body (3) and left free to allow connection with a measuring apparatus, the transverse element (22) not being overmolded and connecting the two blades (21) during this overmolding by the connecting body (3); - embodiment of the plunger body (5) by partial overmoulding of the connecting body (3), portions of the blades (21) not overmolded by the connecting body (3), output wires ( 41) and the thermistor (4). 5
    [0014]
    14. The method of claim 13, wherein, before the step of producing the plunger body (5) and after the step of producing the connecting body (3), the method comprises a step of withdrawal, the element transverse (22) between the two blades (21). 10
    [0015]
    15. The method of claim 12, wherein the two blades (21) are initially supported by a support piece (7) made of electrically insulating material, said support piece (7) now spaced apart and in place the two blades (21). ) inside the mold. 15
    [0016]
    16. The method of claim 15, wherein during the step of molding the plunger (5), the support part (7) between, all or part, melt.
    [0017]
    17. The manufacturing method according to claim 15, wherein the method comprises the following steps: - solder connection of the output leads (41) of the thermistor (4) to the proximal end portions (210) of the blades (21). ) which extend under the support piece (7); - embodiment by overmolding the plunger (5) and a connecting body (3) according to a method of mono-injection of a plastic material inside an injection mold, said connecting body ( 3) being overmoulded around the support piece (7) and portions of the blades (21) which extend above the output leads (41), said blades (21) having distal end portions (211) ) not overmolded by said connecting body (3) and left free to allow connection with a measuring apparatus, so that the plunger (5) and the connecting body (3) are made in one piece in the same plastic material. 35
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    FR3078400A1|2019-08-30|SYSTEM FOR MEASURING THE TEMPERATURE OF A FLUID CIRCULATING IN A CONDUIT
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    FR2941512A1|2010-07-30|DEVICE FOR CONNECTING PLASTIC CONDUITS.
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    FR2984494A1|2013-06-21|TEMPERATURE SENSOR
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    EP0822049A1|1998-02-04|Method for coating a silicone part on an elongated element and high voltage connecting device obtained by this method
    BE876509A|1979-11-23|MANUFACTURED PRODUCTS SUBJECT TO THERMAL DIMENSIONAL RECOVERY
    同族专利:
    公开号 | 公开日
    FR3035212B1|2017-04-28|
    US20160305825A1|2016-10-20|
    US10481011B2|2019-11-19|
    CN106052896A|2016-10-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2660431A1|1990-03-27|1991-10-04|Jaeger|Temperature sensor with thermistor|
    EP0508891A1|1991-04-08|1992-10-14|Jaeger|Method of making a device for controlling the intake air of motor vehicles comprising a thermistor for measuring the temperature of the intake air and device made according to this method|
    FR2699673A1|1992-12-18|1994-06-24|Jaeger|Temp. detector, e.g. for vehicle motor cooling liquid|
    FR2714462A1|1993-12-23|1995-06-30|Jaeger|Method of fabricating thermistance type temperature detector for detecting temp. of air in motor vehicle fuel injection system|
    FR2582398B1|1985-05-24|1987-08-21|Jaeger|TEMPERATURE MEASURING DEVICE WITH ALARM CONTACT, PARTICULARLY FOR MOTOR VEHICLES|
    FR2793020B1|1999-04-27|2001-12-28|Sc2N Sa|TEMPERATURE SENSOR, IN PARTICULAR FOR MEASURING FLUID IN A MOTOR VEHICLE ENGINE|
    US7812705B1|2003-12-17|2010-10-12|Adsem, Inc.|High temperature thermistor probe|
    DE102004062908B4|2004-12-22|2012-01-19|Behr Thermot-Tronik Gmbh|Sensor and method for manufacturing a sensor|
    US7600914B2|2005-12-02|2009-10-13|Bronnert Herve X|RTD sensor connector seal|
    US20110019714A1|2009-07-24|2011-01-27|Perry Loren R|Overmolded temperature sensor and method for fabricating a temperature sensor|
    CN102322965B|2011-06-01|2013-04-10|成都欧文博科技有限公司|Temperature sensor and packaging equipment and packaging method thereof|
    CN102393260A|2011-11-10|2012-03-28|青岛旭瑞电子有限公司|Integrated injection molding temperature sensor and manufacturing method thereof|
    CN103207032A|2012-01-13|2013-07-17|热敏碟公司|Low-profile temperature sensor probe|
    CN202485824U|2012-04-27|2012-10-10|肇庆市金龙宝电子有限公司|Laterally-clamped special-appearance Negative Temperature Coefficient thermistor temperature sensor|
    JP5896160B2|2012-09-28|2016-03-30|三菱マテリアル株式会社|Temperature sensor|
    AU2013356788C1|2012-12-04|2021-09-23|Fisher & Paykel Healthcare Limited|Medical tubes and methods of manufacture|JP2019219200A|2018-06-18|2019-12-26|矢崎総業株式会社|Oil temperature sensor|
    JP2019219201A|2018-06-18|2019-12-26|矢崎総業株式会社|Sensor body and manufacturing method for sensor body|
    FR3108719A1|2020-03-24|2021-10-01|A. Raymond Et Cie|A method of manufacturing a temperature measuring device intended to be connected to a fluidic connection fitting, and associated intermediate assembly|
    法律状态:
    2016-03-04| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-21| PLSC| Publication of the preliminary search report|Effective date: 20161021 |
    2017-03-22| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-22| PLFP| Fee payment|Year of fee payment: 4 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 6 |
    2020-05-01| CD| Change of name or company name|Owner name: AKWEL, FR Effective date: 20191127 |
    2021-03-18| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1553224A|FR3035212B1|2015-04-14|2015-04-14|TEMPERATURE SENSOR|FR1553224A| FR3035212B1|2015-04-14|2015-04-14|TEMPERATURE SENSOR|
    CN201610230381.1A| CN106052896A|2015-04-14|2016-04-14|Temperature probe|
    US15/099,350| US10481011B2|2015-04-14|2016-04-14|Temperature probe|
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