• 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:
    A magnetic-tape apparatus comprises a deck (1) carrying the cylindrical drum assembly (3), which is provided with at least one rotatable magnetic head (7). A supporting member (31) is mounted on the deck (1) for rectilinear movement towards and away from the drum assembly (3). The supporting member (31) carries at least two mutually spaced tape guides (73 to 76). By a movement of the supporting member (31) towards the drum assembly (3) a part of the magnetic tape (84) in the cassette is led to the drum assembly and is wrapped around a part of the circumference of the drum assembly. There is provided at least one positioning element (77) which is located on a non-rotatable drum section (4) which positions the tape guides (73 to 76) relative to the drum assembly (3) in the end position of the supporting member (31). The tape guides (73 to 76) are rigidly connected to the supporting member (31) and the supporting member further carries positioning means (31d) which in the end position of the supporting member cooperate with the positioning element (77) for positioning the tape guides relative to the drum assembly. FIG.7
    公开号:SU1521295A3
    申请号:SU864027260
    申请日:1986-04-07
    公开日:1989-11-07
    发明作者:Корнелиус Антониус Мюллер Йоханнес
    申请人:Н.В.Филипс Глоэлампенфабрикен (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a technique for storing information and can be used in a tape recorder.
    The purpose of the invention is to increase the reliability of the device.
    FIG. 1 shows the device in the stop state, axonometric; FIG. 2 - the same, top view; in fig. 3 is the same, bottom view in FIG. 4- device in the state of rapid rewind, top view; in fig. 5 - the same, bottom view; in fig. 6 —instructor in working condition, axo-nometri; in fig. 7 - the same, top view; in fig. 8 - the same, bottom view; in fig. 9 shows section A-A in FIG. 7; in fig. 10 is a device schematic top view; in fig. 11 is a view B in FIG. ten; in fig. 12 is a view of B in FIG. ten.
    The device comprises a base 1 in the form of a rigid plate of a tape-forming mechanism 2, a unit of rotating magnetic heads, comprising a guide drum 3, which consists of the lower 4 and top 5 parts, as well as magnetic heads 6 mounted on the disk 7 or on the upper part 5 drum 3. In this case, in the case of installation of magnetic heads on the disc. 7 - the lower 4 and upper 5 parts of the guide drum are stationary, and in the case of installation of magnetic heads on the upper part 5 of the guide drum 3-- only the lower part 4 is stationary. The disk 7 is driven by the engine 8, the shaft 9 of which is connected to 1 O under the base 1. The axis of the shaft 9 runs parallel to the axis of rotation of the guide drum 3. The belt 11 passes around the pulley 10 and
    O1
    to
    Nba
    1C
    coke

    cm
    pulley 12, disk 7 of magnetic heads 6 rigidly connected to the shaft; Tape mechanism 2 includes rewinding shafts 13 and 14 of the side assemblies, high-speed gear 15, 16, operating mode gear 17, drive shaft 18 mounted in the bearing bush 19 and rigidly connected to the flywheel 20 and the gear wheel 21 (FIG. 3), the engine 22 of the drive shaft 18 with the shaft 23, the pulley 24 and the gear wheel 25, the drive shaft 26 of the drive shaft 18. The belt 27 is connected to the pulleys 24 and 28. Pulley 28 rigidly connected to the gear wheel 29 and they are mounted on the axle 30, which attached to the connecting plate 31 with the gear wheel 32, the plate 31 is set axis 33..
    The filling station includes a movable plate 34 in the direction perpendicular to the line between the axes of rotation of the stirring shafts 13 and 14, and the linear guide in the form of a groove 35. The pin 36, rigidly connected to the connecting plate 31, passes. through the groove 35 and is guided by a groove 37, which is provided on the underside, of the movable plate 34. The groove 37 has a special shape and is intended for controlling the connecting plate 31 when the movable plate 34 of the refueling unit is moved.
    The pin 36 provides such a position of the connecting plate 31, in which the gear wheel 29 engages with the fast rewind wheel 15, or the gear wheel 32 with the fast rewind wheel 16, or disengages them. The lever 38 with the pinch roller 39. rotates around the hinge 40. The drive of the lever 38 includes a pin 41 with a gear wheel 42 and a bracket 43, which has a pin 44 with a gear wheel 45
    A movable plate 34 near its front side facing the guide drum 3 is attached to a first spring connection 46 including a spring, for example a plate spring that is attached at one end to the movable plate 34 and mounted on a servo servo 47 on the pin 48. The Servo 47 is located above the movable plate 34. Through the first spring connection 46, which is attached eccentrically to the servo
    five
    0
    five
    0
    five
    0
    five
    0
    five
    the wheel, the latter operates as a crank n-a of the movable plate 34 for moving it from the initial position shown in fig. 1 and 2, to one or the other of the two fast forward positions (of which one fast forward position is shown in FIG. 4), as well as to the final position shown in FIG. 6, 7 and 9-12. The servo wheel 47 has a circular hole 48 through which the remixing shaft 13 passes. This design allows a larger part of the servo wheel 47, which has a relatively large diameter, to be positioned between the remaking shafts 13 and 14.
    The servo wheel 47 engages a cog wheel 49, which has a switching pin 50 acting on the reset switch 51 at the stop position shown in FIG. 2. In the working position shown in FIG. 7, the switching pin 50 actuates the resetting switch 52. The switches 51. And 52 are electrically connected by an electronic circuit (not shown) j which also drives an electromagnet 53 (FIG. 3). The armature of the electromagnet 53 is connected to a switching rod 54, the end of which is connected to the trunnion 55, on which the wheel 56 rotates. To the trunnion 55 is also connected a tension spring 57.
    : In the stop state, the circumference of the wheel 56 is guided to the resistant wall 58, and when the device is turned on it connects the pulley 12 shaft to the wheel 59,
    having a gear wheel 60, an input
    .c meshing with gear wheel 61.
    The latter, in turn, engages with a gear wheel 62, which is fixedly connected with the gear wheel 49. Thus,
     when the electromagnet 53 is turned on, a transmission is established between the shaft 9 of the engine 8 and the servo wheel 47. As a result of this transfer, the movable plate 34 can be shifted from the initial position to the corresponding fast forward position and the final position, and as a result of the reversal of the rotation direction of the engine 8 is retracted. In the final position, the switching pin 50 rests on the switch515
    tel 52 reset. The position of the wheel 59 is determined by means of a positioning means including a counter
    63 and photocell or element of the Hall. This makes it possible to determine the distance traveled by the movable plate 34.
    towards the drum unit from the position shown in FIG. 2. This is important for the fast forward position, of which one position is shown in FIG. 4. By completing the electronic circuit on the microprocessor, it is possible to accurately determine the initial position and the final position of the movable plate 34 by means of the switches 51 and 52 of the return.
    Above the movable plate 34 pin
    64 supports the double-arm corner arm 65 (FIG. 2), having a first end 66, which is pressed in the initial position of the sliding plate
    to the second spring connection of the device, including the wire spring 67. The lever 65 rotates with the servo wheel 47 and, as a result of its rotation, the second end 68 of the double-arm corner lever 65 acts on the wire spring 67, so that the wire spring exerts a force on the lever 38 with a pressure roller 39 to press against the drive shaft 18 by means of a spring force; the strings into the position shown in FIG. T,
    On the upper side of the plate 34, a V-shaped groove 69 is formed, the walls of which form the control means for the pin 70 located on the lever 38 with the pressure roller. When the plate 34 is moved from the initial position to the final position, i.e. from the position shown in FIG. 2 to the position shown in FIG. 7, the lever 38 with the pinch roller passes through the position shown in FIG. 4, in which the pin 70 is located at the apex of the V-shaped groove 69. Thus, the groove 69. provides automatic control of the lever 38 with the pressure roller 39 and when moving towards the drive shaft 18. As a result of the connection between the lever and the pressure roller 39 and the bracket 43 using the control pin 4J, provided by the groove 69 during the movement of the plate 34, also vyzgoaet alternate2956
    The position of the gear wheel 42 to the position shown in FIG. eight.
    The plate of the tape drive mechanism 2 additionally has two levers 71 and 72 mounted for rotational movement relative to the plate of the tape drive mechanism, with the left lever 71 per ftk. 2 rotates around the hinge 73, and the first lever 72, together with the lever 38 with the pressure roller, rotates around the hinge 40. The two levers 71 and 72 are mirror symmetrical with respect to
    5 poor symmetry bone a, which is located midway between the axes of the rewinding shafts 13 and 14 and parallel to them (Fig. 7) and which includes the parental axis of the groove 35. On opposite sides of their axes of rotation, each arm has two arms 74, 75 and 76, 77. At the free ends of the arms 75 and 77, respectively, the levers have belt guides 78 and 79, respectively, which are provided with cylindrical guide surfaces. At the free ends, the shoulders 74 and 76 of the levers have pins BO and 81, respectively.
    0 The plate 34 is provided with control means including guide surfaces 82 and 83, respectively, which are located on the side walls of the plate 34 and are mirror-symmetrical about the plane of symmetry a. As shown in FIG. 2, the guide surfaces 82 and 83 have cylindrically concave portions 84 and 85, respectively, at their ends which are closer
    Q to the drum assembly 3. At the positions of the levers 71 and 72 shown in FIG. 2 (stopping state of the device), the pins 80 and 81, respectively, abut against the surfaces of the parts 84 and 85 cc responsibly and thus occupy stable positions. The guide surfaces 82 and 83 have parts 86 and 87, respectively, on which the pins 80 and 81 rest in the position of the scientific research institute, as shown in FIG. 4, which corresponds to the fast rewind state of the device. The surface portions 86 and 87 include straight guide portions, and adjacent to the straight portion, the guide surfaces 82 and 83 have a concavely curved ridge (its portions 88 and 89, respectively. These end portions, together with the adjacent portions of the straight guides 5 hours
    five
    They are located on the protruding portions of the plate 34, and these protruding portions are of such dimensions that the curved end portions 88 and 89 are elastically bent to a small extent. As shown in FIG. 7, the end portions 88 and 89 of the guide surfaces 82 and 83 ensure a stable arrangement of the guides 78 and 79, respectively, in the working position of the device.
    In the position shown in FIG. 2, the rear part of the slide plate 34 is disposed in the area between the two shuffle shafts 13 and 14. On the front side facing the drum unit 3, the plate 34 additionally has a concave wall 90, the center of curvature of which in the final position of the plate 34 (Fig.7) lies mainly on the axis of the drum unit. This wall encloses an arc approximately 90 and on it near its ends there is a part of the installation means in the form of two positioning protrusions 91 arranged mirror-symmetrically relative to the plane of symmetry a. At their ends, the wall 90 is adjacent to the two frontal parts 92 of the sliding plate, which are mirrored relative to the plane of symmetry a. As shown in Fig. 1, these portions 92 have two tape guides 93, 94 and 95, 96, which are rigidly connected by a plate 34 by means of bases. Each guide belt has a cylindrical circular surface, with the axes of the belt guides 93 and 96 extending perpendicular to the plate of the tape mechanism 2, and the axes of the belt guides 94 and 95 running parallel to the axis of rotation of the disk 7 of the heads.
    At the bottom of the drum 3, the other part of the mounting means is extended, consisting of a recess. In the present embodiment, the recess is an annular groove 97 on the outer wall, with the groove located in the plane of the perpendicular axis of the drum assembly. As an alternative option, separate local recesses can be formed on the outer wall of the lower section.
    ,
    Part 4 of the drum. The advantage of the groove is that it can be easily and accurately performed on the outer wall of the bottom 4 of the drum. AT
    ten
    15
    20
    25 |
    thirty
    35
    40
    45
    50
    55
    the normal operating mode of the device, in which the plate 34 is in the final position (Fig. 7), the protrusions 91 are engaged with the wall of the groove 97 (Fig. 9), so that the correct guides of the tape ensure that the drum assembly 3 is correctly positioned connections between the protrusions 91 and the tape guides 93-96. The wire spring 46 ensures that the protrusions 91 are pressed tightly against the groove 97. In the embodiment shown in FIG. 1-9, the protrusions 91 are located at different levels relative to the plate 1 of the tape drive mechanism 2 as a result of the location of the groove 97 in a plane perpendicular to the axis of the drum assembly 3 (Fig. 9). If, in the case of an alternative mounting means, two local recesses are formed on the outer wall of the lower part 4 of the drum 3 at the same level, the protrusions 91 can also be formed at the same level.
    On the back side, remote from the drum unit 3, the plate 34 may have an adjusting screw, the axis of which is preferably located in the plane of symmetry a (FIG. 9). The installation of the adjusting screw 98 influences the position of the various guide belts, since the protrusions 91 can be tilted in the groove 97 around the connecting line b between the two projections 91 by tightening or releasing the specified screw. The protrusions 91 and the groove 97 in cross section are conical in shape, the cross section being taken in a plane containing the axis of the drum unit for smooth engagement between the walls of the protrusions and the groove (Fig. 9). Accordingly, the plate 34 is formed as a unit in one piece with protrusions 91 and tape guides 93-96, and this block is preferably made of plastic. The advantage is that the linear shape used to make this block accurately defines the different sizes. In this way, the tolerances of the various parts of the slide plate are minimized.
    The back of the plate 34 contains a locking wall 99, which acts on the locking element 100, record 5 1
    A cassette holder 101, located above the plate 1 of the tape mechanism 2, Only part of this cassette holder 101 is shown in FIG. 1. The locking element 100 is rotatably connected to the plate of the Tape Mechanism and rests against the locking wall 99 by means of a tension spring 102 in the stop state of the device. In this position of the locking member 100, the cassette holder 101 is not locked. Then a cassette with a magnetic tape (not shown) can be inserted into the holder 101, after which the holder moves downward by moving the cassette with the coils 103 and 104 with the tape towards the plate 1 of the tape mechanism 2 until the tape rolls engage with rotary shafts 13 and 14 respectively. The holder 101 can be made in the form of a holder rotatably coupled with the traction mechanism 2. As the plate 34 is moved to its final position, the locking element 100 is rotated by the action of the spring 102, thereby locking the holder of the cassette. Thus, the plate also facilitates locking and unlocking of the cassette holder.
    As shown in FIG. 3, the bottom surface of the plate 34 has brake means 105 containing an element passing through the groove 35 and with two pointed end portions 106 which engage with parasitic collar teeth with 15 and 16 fast forwards in the stop position, plate 34 Thus, the winding shafts 13 and 14 are locked in the stop position. As a result of the movement of the plate 34 towards the drum unit 3, the braking device 105 disengages from the parasitic fast-forward wheels so that these wheels can be freely rotated.
    Together with the inclination of the axis of the drum unit 3 and the axis of rotation of the head disk 7, they can be perpendicular to the plate of the tape drive mechanism 2. This embodiment is shown in FIG. 10-12, the ribbons 78 and 79 also occupy perpendicular positions, and the ribbons 93 and 96 will be inclined. With the corresponding article
    Q 5 0 5 About
    Q with Q
    five
    five
    9510
    By these inclined positions of the tape guides 78 and 79 and the tape cassette, the path of movement of the magnetic tape 106 around the drum assembly 3 will then be similar to that shown in FIG. 1-9. The advantage of this design is that the protrusions 91 of the plate 34 can be located at the same level relative to the plate-1 of the tape drive mechanism 2.
    Before activating the device for working with magnetic tape -, with coils J 03 and 104, it must be engaged with the rewinding shafts 13 and 14 by means of a cassette holder. The cassette is lowered into position on the spring-loaded locating pins 107, two of which are shown in FIG. 1. A magnetic tape wound around the coils passes around the tape guides 108 in the cassette, which are shown schematically in FIG. 1 and 2. When the tape cassette is in a predetermined position, the guides 78 and 79 of the tape, the pressure roller 39 and the guides 93-96 of the tape are separated from the drum assembly 3 by the front of the magnetic tape. This is possible because the cassette case is so designed that there is space in the case for mounting these elements. In this regard, it is important that, as a result of the operation of the first control means 82, 83, the tape guides 78 and 79 are set in the correct position, and also due to the action of the second control means 69, the lever with the pressure roller engages the stopper 108 (Fig.) And the most, holding the pressure roller 39 in the correct position. In this stopping position, the magnetic tape does not interact with the pressure roller 39, the tape guides 78 and 79, and the tape guides 93-96.
    When the device is turned on, the engine S is started, causing the disk 7 of the heads to rotate in the direction indicated by arrow A. If the electromagnet 53 is now turned on, this causes the servo wheel 47 to begin to rotate in the direction indicated by arrow C in FIG. I, withdrawing the brake means 105 from engaging with parasitic wheels 15 and 16 accelerated rewinding, locking the cassette holder 101, directing the pin 36 on the connecting plate 31 to the section 109 of the groove 37 in the plate 34 and leaving it in this area for some time and turning the levers 71 and 72 using guide surfaces 82 and 83, respectively, so that the magnetic tape is removed from the tape guides 78 and 79 of the tape guides, but still not in contact with the drum unit 3, and when the pin 70 is on the lever 38 with pinch roller crosses first the branch of the V-shaped groove 69, the lever with the pressure roller remains in its initial position at the stopper 108. Depending on the selected key, the plate-operated device 34 now moves to the position in which the pin 36 is still. in the groove section 109, or the plate 34 moves somewhat further to the position shown in FIG. 4 and 5, in which the pin 36 is located on the groove section 110. In the first 3y6iiaToe fast-forward position, the wheel 29 on the connecting plate 31 engages with a rotary accelerated rewinding wheel 16, as shown in FIG. 3, while in the second fast-forward position, the gear 32 on the joint; The extension plate is engaged with the parasitic fast-rewind wheel 15. Thus, in the first position of rapid rewinding, the magnetic tape quickly places on the reel 104 with the tape on the winding shaft 14, and in the second half; Fast forwarding shown in FIG. 4 and 5, the tape is wound on a reel 103 with a tape on the rewinding shaft 13. Fast rewind is achieved by the fact that at the end of the movement of the plate 34, when the electromagnet 53 is turned off and therefore the rotation of the servo wheel 47 stops, the drive motor 22 starts the direction indicated by the arrow D. This rotation spins the rotation of the drive shaft 18 in the direction indicated by the arrow B, but in this position, the tape does not touch the pressure roller 39 and the drive shaft 18. For fast rewinding As a result, the hull shape
    5 O d 0 5
    five
    0
    The tape cassettes between coils 103 and 104 were not in contact with any parts of the cassette case (such as guides 108). During fast-forwarding, only the tape guides 78 and 79 affect the trajectory of the tape. The correct position of the plate 34 for fast forwarding in both directions is determined. a position determination means 63 that interacts with the wheel 59. However, this position can also be determined by other methods, for example, by using sliding contacts that directly determine the position on the plate 34.
    If, as a result of switching on the electromagnet 53, the plate 34 is moved from the initial position to the final position, as shown in FIG. 6-12, the V-shaped groove 69 causes the lever 38 to rotate with the pressure roller 39 to its final position and, under the action of the spring 67, the pressure roller 39 is pressed against the drive shaft 18 (Fig. 7). During this rotational movement of the lever 38, the bracket 43 rotates 41, so that the gear wheel 42 engages with the parasitic wheel I7 of the usual mode, and the tape is swung onto the reel 104 on the stirring shaft 14 by means of a friction rewind (not shown). When the plate 34 has moved to its final position, it is important that the magnetic tape, which was originally threaded out of the cassette body by the guides 78 and 79, now be guided by the tape guides 93 and 96 and tucked around the drum 3 node with an angle of yo 90 °. This operation is referred to as a magnetic tape refill. At the end of the movement, the guides 94 and 95 of the tape play an important role in this operation. As a result of tilting the axis of rotation of the disk 7 of the heads and the axis of the drum assembly, the tape now wraps around the wall of the drum assembly along a spiral path. This allows writing to tape or reading from. it is inclined with the help of magnetic heads 6. If the tape is filled this way around the drum 3 assembly, then it is important that the 93-96 tape guides are exactly aligned with the drum assembly. This is achieved by
    15
    20
    25
    the protrusions 9 together with the groove 97 on the lower part 4 of the drum. This provides a very accurate, at the same time easily obtained arrangement of the projections. In this regard, it is important that the protrusions 91 and the groove 97 have a conical shape, so that during the engagement of these parts with the wall of the groove they are automatically correctly aligned relative to each other (Fig. 9).
    In addition, the trajectory of the tape can be adjusted using the adjusting screw 98, but if the parts are made exactly, for example using the injection method, this adjustment can be eliminated. The final servo wheel 47 is determined by the switching pin 50 on the gear 49, acting on the reset switch 52. In this final position, servo 47 tightly presses the protrusions 91 to the groove 97 by means of a spring 46 and spring 67 exerts pressure on the lever 38 with the pressure roller 39, so that the pressure roller 39 presses against the drive shaft i8 with a predetermined force. At this point, the device enters a normal operating state, and the signals can be recorded or matched. tapes.
    The plate 34 may also have an elastic bracket 111 (Fig. 7), which is provided with friction means containing two mutually spaced felt elements 112 and 113, each of which can be pressed against the rewinding shaft 13 to apply an oppositely directed torque to the rewinding shaft 14 to hold the tape taut when the magnetic tape is stretched. In the first accelerated rewind position, the fluted element 112 is pressed against the grinding shaft 3, and in the usual position with which the felt element 113 is pressed.
    pressed against this shaft. The position of the felt element 112 relative to the plate 34 is such that in the second
    Lozenin fast-forwarding when the tape is wound on the remix shaft 13, this felt element 112 is not in contact with the rotary shaft. In the second fast-forward position only the felt element 114, located on the elastic bracket I15 on the plate
    thirty
    50
    55
    0
    five
    Oh with
    0
    0
    five
    34, is pressed against the rewinding room 14 to apply an oppositely directed torque to this rewinding shaft. This selective use of the felt elements is possible as a result of the movement of the plate 34 to different positions.
    In addition to properly positioning the tape guides 93-96 relative to the drum unit 3, the proposed magnetic tape device has the advantage that the plate 34 can be made in one piece with the various parts necessary to control the various functions of the device. . The plate 37 is made in one piece with the means for controlling the drive of the spindle shafts, the means for controlling the lever and the pressure roller, the means for controlling the swivel arms, the guide belts, the means for controlling the brake means, the means for controlling I with the lock means for holding - sets and means for automatic positioning of tape guides. In addition, the plate 34 may have an Iffraction means for applying an oppositely directed steep n (of its moment to the corresponding rewinding shaft. The advantage of this

    This means that the control logic of the device is synchronized directly with the position of the movable plate 34. Thus, in each position of the plate 34, the guide belts occupy positions that exactly correspond to the selected functions of the device.
    It should be noted that, as a variant, the servo wheel 47 can be driven into rotation from a separate engine, in this case, the electromagnet 53 and the wheel 56 can be excluded, the other wheels driven by them into rotation. This individual motor is turned on and off and, if necessary, its direction of rotation is changed by means of an electronic circuit.
    Ula Invention Form
    权利要求:
    Claims (5)
    [1]
    1. A device for filling the information carrier in a tape recorder, containing a base with a rotating magnetic unit located on it .1515
    Devices with a guide drum, consisting of lower and upper parts, a refueling unit, BJ key Il |; a movable plate connected to a linear movement guide, guide elements for the information carrier, as well as positioning projections located at a distance of each from each other, characterized in that, in order to increase the reliability of the device, the lower part of the guide drum is stationary and contains, together with a movable plate, mounting means, including positioning projections and at least at least one recess, and the guide elements for the information carrier are fixed on the movable plate.
    [2]
    2. The device according to claim 1, characterized in that the protrusions of 516
    positioning and at least one recess are made conical.
    [3]
    3. A device according to claim 1, characterized in that the recess is made in the fixed part of the guide drum in the form of an annular groove.
    [4]
    - A device according to claim 1, characterized in that it is mobile. the plate contains an adjusting screw with a supporting surface opposite the mounting means, and the base is provided with a guide groove for the supporting surface of the adjusting screw.
    [5]
    5. The device according to claim I, characterized in that it is movable
    the plate, the guide elements for the information carrier and the positioning protrusions are made of plastic.
    78 Ю5
    shz.
    52
    3
    . / 3 Yu
    65 67
    t
    3579
    02 101 figl
    39 7 B985 g
    57 7 58
     Fig.Z
    H
    51 61 5v
    Fig.c
     J
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1521295A3|1989-11-07|Device for fitting information carrier in tape recorder
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    US4388658A|1983-06-14|Magnetic tape recording and/or reproducing apparatus
    US4370682A|1983-01-25|Tape loading apparatus in a recording and/or reproducing apparatus
    KR940006388B1|1994-07-20|Apparatus for controlling an anto-reverse tape recorder having a mode-changing mechanism
    US3753566A|1973-08-21|Cassette adapter
    US5006941A|1991-04-09|Reversible drive mechanism for a tape recording apparatus
    US4055288A|1977-10-25|Front drive cartridge-tape player system with fast forward and reverse modes
    CA1334770C|1995-03-14|Magnetic tape recording and playback apparatus with single drive source
    US4933787A|1990-06-12|Tape loading device for high-speed search of a VCR
    US4034925A|1977-07-12|Front drive cartridge-tape player system with fast forward and reverse modes
    US4688120A|1987-08-18|Magnetic tape apparatus with integrated control mechanism
    KR850000106B1|1985-02-22|Magnetic tape recorder
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    KR870000119B1|1987-02-11|Mode arrangement apparatus with a video tape recorder
    KR100296589B1|2001-10-26|Tape tension adjusting device of magnetic record player
    JP3984711B2|2007-10-03|Reel base unit
    KR900002505Y1|1990-03-30|Disc loading and injection apparatus for the optical disc player
    同族专利:
    公开号 | 公开日
    NL8501027A|1986-11-03|
    US4706140A|1987-11-10|
    KR860008541A|1986-11-15|
    CS243886A2|1990-04-11|
    SG56491G|1991-08-23|
    AU5570886A|1986-10-16|
    HK19292A|1992-03-20|
    CS272217B2|1991-01-15|
    JPS61233456A|1986-10-17|
    EP0197602A1|1986-10-15|
    DE3675802D1|1991-01-10|
    EP0197602B1|1990-11-28|
    AU582330B2|1989-03-16|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL8501027A|NL8501027A|1985-04-09|1985-04-09|MAGNETIC TAPE DEVICE.|
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