JP4772073B2 - Disc player - Google Patents

Description

  The present invention relates to a disk reproducing apparatus that operates a disk reproduction assisting means such as a disk transport mechanism by a motor that reciprocates a pickup, and in particular, a simple mechanism for transmitting the power of the motor to the disk reproduction assisting means by inserting a disk. The present invention relates to a disc reproducing apparatus.

2. Description of the Related Art Disc playback devices that operate disc playback assisting means such as a disc transport mechanism by a pickup driving motor are widely known.
In other words, the power of the motor is alternatively transmitted to the pickup and the operating gear via the switching means. Then, the slide plate is driven to reciprocate by the rotational force of the operating gear, and the disc reproduction assisting means is operated by the movement of the slide plate. The disk reproduction assisting means includes a disk transport mechanism, a clamper mechanism, a chassis lock mechanism, and the like.

In Patent Document 1, the disc contact portion (20a) of the trigger member (20) is pushed on the outer periphery of the disc to rotate the trigger member (20) as shown in FIG. 7, and the pressing portion (20d) ( 3), the slider (22) is moved so that the rack gear (22a) provided on the slider (22) meshes with a drive gear (not shown), and the power of the motor is transmitted to the slider (22) to thereby move the slider (22). Is moved with the slide member (21), and the disc playback assisting means such as a disc transport mechanism is operated by the movement of the slide member (21).
JP 2006-302476 A

  In the disk reproducing device shown in Patent Document 1, a slider having a rack gear and a trigger member pushed by the disk are provided as components involved in transmitting the rotational force of a drive gear (not shown) to the slide member. Many parts were required and the configuration was complicated.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a disc reproducing apparatus in which a mechanism for appropriately transmitting the rotational force of an operating gear driven by a motor to a slide plate is simplified. To do.

According to the present invention, a motor, an operating gear, switching means for transmitting the power of the motor to the pickup or the operating gear, and a rotational force of the operating gear are appropriately moved in the disk insertion direction on the chassis on which the pickup is mounted. The present invention relates to a disk reproducing apparatus provided with a slide plate for operating disk reproducing auxiliary means involved in loading and unloading of a disk, and is characterized by comprising a trigger member and a meshing control means.
The trigger member is attached to the chassis with a pivotal fulcrum provided between the rack and the abutting portion so as to be rotatable and movable in the disk insertion direction.
The engagement control means urges the rotation fulcrum of the trigger member in the direction of ejecting the disk and the rotation of the rack in a direction away from the operating gear before the disk is inserted. When the trigger member engages with the gear and moves in the disc insertion direction, the engagement state is maintained. The slide plate follows the trigger member and moves in the same direction.

  The meshing control means may be composed of an urging means and a meshing holding means. In other words, the urging means urges the rotation fulcrum of the trigger member in the disk ejection direction and urges the rack in a direction away from the operating gear before inserting the disk. Further, the engagement holding means holds the engagement state when the rack is engaged with the operation gear by the insertion of the disk and the trigger member moves in the disk insertion direction.

  Further, the mesh holding means includes a sliding contact portion provided on the trigger member and a sliding contact portion provided on the chassis, and the sliding contact portion is covered when the trigger member moves in the disc insertion direction. It is preferable that the meshing state between the rack and the operating gear is maintained by sliding contact with the sliding contact portion.

  The slidable contact portion may be formed long in the disk insertion direction on the chassis, and the slidable contact portion may be a protrusion that appropriately slidably contacts the slidable contact portion.

  The biasing means may be a spring.

  The biasing means may be constituted by a leaf spring extending from a part of the trigger member and a spring receiver provided in the chassis. In this case, before the disc is inserted, the leaf spring presses the extended end portion against the spring receiver to urge the rotation fulcrum of the trigger member in the disc ejection direction and to move the rack away from the operating gear. It is preferable that the leaf spring is detached from the spring receiver by urging and moving the rotation fulcrum in the disk insertion direction accompanying the disk insertion.

  The engagement control means may be constituted by a single torsion spring type reversal spring. One end of the reversing spring is always positioned closer to the disc insertion direction than the rotation fulcrum of the trigger member so that the rotation fulcrum is biased toward the disc ejection direction, and the other end is closer to the disc insertion direction than the rotation fulcrum. And it shall be located in the disk discharge | emission direction side rather than the said one end, and shall be attached to a trigger member. In this case, when the trigger member is pressed against the disk by the abutting portion and rotated in the counter-biasing direction, the reversing spring reverses to switch the rotating biasing direction with respect to the trigger member, and the rack and the operation The meshing state with the gear is maintained.

  The trigger member has a shaft portion with a circular cross section, the center of the shaft portion serves as the rotation fulcrum, and the shaft portion has a retaining portion at the tip, and the chassis has the shaft portion inserted into the disk. It is preferable to have a guide groove that guides in the outward direction, and to have an attachment / detachment opening through which the retaining portion can be inserted at one end of the guide groove.

  According to the present invention, a trigger member having a rotation fulcrum is provided between the abutting portion pressed by the disk and the rack, and the rotation fulcrum of the trigger member is rotatable with respect to the chassis and in the disk insertion direction. Since the meshing control means controls the meshing state of the rack with respect to the operation gear, the single trigger member can serve as both the trigger member and the slider shown in Document 1. In addition, the mechanism for transmitting the rotational force of the operating gear to the slide plate is simplified, and the number of parts is reduced, resulting in a simple and inexpensive configuration.

  Further, when the meshing control means is composed of a biasing means having a function of biasing the trigger member and a meshing holding means having a function of maintaining the meshing state, the design of the meshing control means can be facilitated. it can.

  Furthermore, the structure of the mesh holding means can be simplified by configuring the mesh holding means with a sliding contact portion provided on the trigger member and a sliding contact portion provided on the chassis.

  In this case, the sliding contact portion is formed long in the disk insertion direction on the chassis, and the sliding contact portion is a protrusion that is appropriately slidably contacted with the sliding contact portion, so that the engagement holding means is further simplified. It becomes.

  By configuring the biasing means with a spring, the configuration of the biasing means is simplified.

  The urging means includes a leaf spring extending from a part of the trigger member and a spring receiver provided in the chassis, and the trigger member moves in the disc insertion direction when the disc is inserted. By making the leaf spring disengage from the spring receiver, the load of the leaf spring can be eliminated when the trigger member moves in the disc insertion direction. Therefore, smooth engagement between the rack and the operating gear is possible.

  If the meshing control means is constituted by a single torsion spring type reversal spring, the construction of the meshing control means is further simplified.

  The trigger member has a configuration in which a retaining portion is provided at the end of the shaft portion, and an attachment / detachment opening is provided at one end of the guide groove, so that the attachment of the trigger member to the chassis is inserted through the attachment / detachment opening. Then, it is completed simply by inserting the shaft portion into the guide groove. Therefore, the work for attaching the trigger member to the chassis is facilitated.

A first embodiment for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an in-vehicle disc reproducing apparatus. A disc insertion slot 2 for inserting a disc is provided on the front side of the disc reproducing apparatus 1. Arrow A indicates the disc insertion direction, and the opposite direction is the disc ejection direction. The disc insertion direction and the disc ejection direction are collectively referred to as a disc insertion direction.

  FIG. 2 is an exploded perspective view showing the disc reproducing apparatus divided into an upper unit 3, a floating mechanism 4, and a lower unit 5.

  As shown in FIGS. 1 and 2, the upper unit 3 is configured by attaching a disk detection mechanism 7 and the like to an upper frame 6. As shown in FIG. 2, the floating mechanism 4 is configured by attaching a pickup unit having a pickup 9 and the like to the floating chassis 8, a turntable 10, a clamper mechanism, a chassis lock mechanism, and the like. The clamper mechanism rotates the clamper support plate 13 that supports the clamper 11 up and down to bring the clamper 11 into and out of contact with the turntable 10. As shown in FIG. 2, the lower unit 5 is configured by attaching a transport roller mechanism or the like on the lower frame 12.

FIG. 3 is a plan view of the floating mechanism 4, and a part of the floating chassis 8 is indicated by a virtual line. The floating chassis 8 is made of a metal plate, and the pickup unit includes a pickup 9, a pickup guide 14, a motor 15, a feed screw 16 provided in parallel with the guide 14, and a pickup that is motively coupled to the feed screw 16. It is comprised from the side transmission gear 17 grade | etc.,.
An operating gear 18 is attached to the right end of the lower surface of the floating chassis 8. A worm gear 19 directly connected to the motor 15 is engaged with a first gear 20, and a second gear 22 is mounted on a switching plate 21 that is rotatable about the axis of the first gear 20. The gear 20, the second gear 22 and the switching plate 21 constitute switching means 23. The second gear 22 is always meshed with the first gear 20, and the second gear 22 is selectively meshed with either the pickup-side transmission gear 17 or the operating gear 18 by the rotation of the switching plate 21. Is selectively transmitted to the pickup-side transmission gear 17 or the operating gear 18 via the switching means 23.

  A slide plate 26 is attached to the right side surface of the floating chassis 8 so as to be able to advance and retract in the disk insertion direction. The slide plate 26 moves in the disk insertion direction to operate disk reproduction assisting means such as a transport roller mechanism, a clamper mechanism, and a chassis lock mechanism that are involved in loading and unloading the disk. A trigger member 27 made of synthetic resin is attached to the lower surface of the floating chassis 8 between the slide plate 26 and the operating gear 18. The trigger member 27 has a slightly bent shape at the intermediate portion, has a contact portion 28 at one end thereof, and has a rack 29 at the left edge portion on the other end side, and the intermediate portion, that is, the contact portion 28. A shaft portion 30 having a circular cross section is provided on the upper surface between the shaft 29 and the rack 29, and a retaining portion 31 wider than the shaft portion 30 is provided at the upper end of the shaft portion as shown in FIG. The abutting portion 28 protrudes to the upper surface side of the chassis 8 through an opening provided in the floating chassis 8.

Further, on the upper surface of the trigger member 27, a small columnar protrusion 33 is provided as a sliding contact portion at a position near the rack 29. The floating chassis 8 is provided with a rising piece 34 positioned to the right of the contact portion 28. The trigger member 27 is provided with a slit 35 for giving elasticity to the end of the rack 29 in the disk insertion direction. By providing the slit 35, the rack 29 can be smoothly engaged with the operating gear 18.

As shown in FIGS. 4 and 5, on the upper surface of the trigger member 27, an engagement portion 36 that protrudes rightward from the right edge portion on the opposite side to the rack 29 is provided. The engaging portion 36 has a low wall 37 on the disk insertion direction side and a high wall 38 on the disk ejection direction side, and the high wall 38 is located on the right side of the low wall 37. Further, as shown in FIGS. 8 and 9, a portion of the high wall 38 that is higher than the low wall 37 is an inclined portion 39 that is inclined toward the disc insertion direction. The upper end of the surface of the low wall 37 facing the high wall 38 is chamfered, and the slide plate 26 is provided with an engagement hole 40 for inserting the high wall 37 from the left side.

As shown in FIGS. 4 and 5, the floating chassis 8 is provided with a guide groove 41 that is long in the disk insertion direction, and the shaft portion 30 of the trigger member 27 is inserted into the guide groove 41 from below, The shaft portion 30 is guided so as to advance and retract in the disc insertion direction. The trigger member 27 is also rotatable about the center of the shaft portion 30 as a rotation fulcrum. An attachment / detachment opening 42 through which the retaining portion 31 can be inserted is provided at the end of the guide groove 41 on the disk insertion direction side. The trigger member 27 is attached to the floating chassis 8 by floating the retaining portion 31. After the chassis 8 is inserted into the attachment / detachment opening 42 from the lower surface side, the shaft portion 30 is slid in the disc ejection direction and the shaft portion 30 is inserted into the guide groove 41, so that it is easily completed.
The floating chassis 8 is provided with a long hole 45 that is long in the disk insertion direction. The right edge of the long hole 45 has a recess 46 as an end on the disc ejection direction side, and a sliding contact portion 47 at the other portion, and a portion in contact with the sliding contact portion 47 of the recess 46 is, for example, an inclined guide This is part 48. The sliding contact portion 47 and the protrusion 33 constitute a mesh holding means 49. Thus, by configuring the mesh holding means 49 with the sliding contact portion and the sliding contact portion 47, the configuration of the mesh holding means can be simplified. In particular, when the sliding contact portion is the protrusion 33 and the sliding contact portion 47 is formed long in the disk insertion direction on the chassis, the meshing holding means is further simplified. A distance between the sliding contact portion 47 and the left edge portion of the long hole 45 facing the sliding contact portion 47 is set to a dimension that allows the protrusion 33 to slide smoothly.

  Between the trigger member 27 and the slide plate 26, a torsion spring 50 as an urging unit is stretched, and the torsion spring 50 and the engagement holding unit 49 constitute an engagement control unit 51. In this way, by configuring the meshing control means 51 with the biasing means (torsion spring 50) and the meshing holding means 49, the design of the meshing control means can be facilitated. In particular, by configuring the biasing means with a spring (torsion spring 50), the configuration of the biasing means is further simplified. One end of the torsion spring 50 is attached to a part of the slide 26, and the other end is attached between the abutting portion 28 of the trigger member 27 and the rotation fulcrum 52. It is located on the disc insertion direction side from the end, and the other end is located on the left side of the straight line connecting the one end and the rotation support point.

  As schematically shown in FIG. 6, the operating gear 18 is a three-stage gear having a large gear with a small gear on the upper surface side and a medium-sized helical gear on the lower surface side, and the first gear 20 is The second gear 22 is a two-stage gear having a large gear on the top and a small gear on the bottom.

The first gear 20 has its large gear meshed with a worm gear 19 directly connected to the motor, and its small gear meshed with the large gear of the second gear 22. The second gear 22 has its large gear meshed with the transmission gear 17 as appropriate, and its small gear meshed with the large gear of the operating gear 18 as appropriate. The actuating gear 18 meshes the rack 29 of the trigger member 27 with the small gear as appropriate, and the helical gear is always meshed with the second worm gear 54 arranged in parallel with the lower surface of the floating chassis 8.

The second worm gear 54 is meshed with the helical gear of the first conveyance gear 55, and the second conveyance gear 56 is meshed with the gear portion of the first conveyance gear 55. The second transport gear 56 is located on the upper surface side of the floating chassis 8, and the third transport gear 57 is appropriately meshed with the gear 56.

As shown in FIG. 7, the third transport gear 57 is provided at one end of the transport roller 58, and a bracket 59 that supports the transport roller 58 is attached to the lower frame 12. The second worm gear 54, the first transport gear 55, the second transport gear 56, the third transport gear 57, the transport roller 58, and the bracket 59 constitute the transport roller mechanism.

As shown in FIG. 10, the slide plate 26 is provided with lock grooves 61 and 62 constituting a part of the chassis lock mechanism on the disk insertion direction side and the disk discharge direction side of the engagement hole 40, respectively. It has been. An attachment hole 63 is provided above the lock groove 62, and the shaft 65 of the rotating piece 64 is rotatably fitted in the attachment hole 63. The rotating piece 64 has a cylindrical engaging protrusion 66 protruding left and right from its rotating end, and as shown in FIG. 8, the engaging protrusion 66 is inserted into the engaging hole before the disc is inserted. 40 is positioned on the disc insertion direction side of the high wall 38.

As shown in FIGS. 8 to 10, the engaging hole 40 matches the edge of the disc ejection direction side with the shape of the high wall 38, and the edge of the disc insertion direction side is the height of the low wall 37. The upper portion is recessed, and the upper edge of the recess is a stepped portion 68.

  In the disc reproducing apparatus configured as described above, the slide plate is located at the lower position in FIG. 3 before the disc is inserted. At this time, the switching plate 23 is in a position rotated in the clockwise direction, and the second gear 22 is engaged with the operating gear 18. Further, as shown in FIG. 4, the torsion spring 50 urges the trigger member 27 in the disc ejecting direction and rotationally urges it counterclockwise to separate the rack 29 from the operating gear 18. Further, as shown in FIG. 8, the engaging protrusion 66 of the rotating piece 64 is at the upper end of the lower wall 37 of the engaging part 36, but the center of the shaft 65 is further than the center of the engaging protrusion 66. The engaging protrusion 66 is located on the disk insertion side of the inclined portion 39.

  When the disk D is inserted from the disk insertion slot 2, the disk detection mechanism 7 detects the insertion of the disk D, a switch (not shown) is turned on, the motor 15 (see FIG. 3) is activated, and the operating gear 18 is connected to the motor 15 To rotate counterclockwise.

  The inserted disc D pushes the contact portion 28 of the trigger member 27 as shown in FIG. 5 and rotates the trigger member 27 in the clockwise direction against the torsion spring 50. As a result, the rack 29 of the trigger member 27 meshes with the operating gear 18.

As a result, the trigger member 27 receives the rotational force of the operating gear 18 and moves in the disc insertion direction, and the protrusion 33 is brought into sliding contact with the sliding contact portion 47, whereby the meshing state of the rack 29 and the operating gear 18 is maintained. Is done. Further, when the trigger member 27 moves in the disc insertion direction, the upper end of the low wall 37 of the engaging portion 36 is disengaged from the engaging protrusion 66 and falls between the high wall 38 and the low wall 37 by its own weight. Even if it does not fall due to its own weight due to friction between the shaft 65 and the mounting hole 63, the inclined portion 39 of the engaging portion high wall 38 abuts against the engaging protrusion 66, and this engaging protrusion 66 is Guide between 38 and the low wall 37. At this time, since the stepped portion 68 of the engagement hole 40 is located above the engagement protrusion 67, there is no possibility that the engagement protrusion 67 may accidentally escape from between the high wall 38 and the low wall 37. After the trigger member 27 has moved about 4 mm as shown in FIG. 9, the high wall 38 of the trigger member 27 pushes the engagement protrusion 66 of the rotating piece 64, so that the slide plate 26 moves to the trigger member 27. Follow and move in the same direction. Note that the engagement protrusion 66 may push the disk insertion direction side edge of the engagement hole 40 of the slide plate 26 to cause the slide plate 26 to follow. Along with the movement of the slide plate 26, the disk reproduction assisting means such as a disk transport mechanism, a clamper mechanism, and a chassis lock mechanism are operated, and the switching plate 23 is rotated counterclockwise so that the second gear 22 is transmitted. The power of the motor 15 is transmitted to the pickup 9 by meshing with the gear 17 and the reproduction operation is started. Here, the trigger member 27 has a function of rotating by being pushed by the disk D and a function of moving the slide plate 26 in the same direction by receiving the rotational force of the operating gear 18 and moving in the disk insertion direction. Therefore, the function of a plurality of parts in the conventional apparatus can be achieved with one trigger member, the number of parts is reduced, the configuration is simplified, and an inexpensive apparatus can be obtained.

Next, when the reproducing operation is finished and the disk is taken out, the switching plate 23 is rotated clockwise, the second gear 22 is engaged with the operating gear 18, the motor 15 is reversed, and the power is The trigger member 27 is transmitted to the trigger member 27 via the operating gear 18, and the trigger member 27 moves in the disc ejection direction. At this time, since the low wall 37 of the engaging portion pushes the engaging protrusion 66 of the rotating piece 64 in the disc ejection direction, the slide plate 26 also follows the trigger member 27 and moves in the same direction (FIG. 9). By the movement of the slide plate 26, the chassis lock mechanism locks the floating chassis, the clamper 11 is raised, and the disc is carried out by the transport mechanism.

Thereafter, the trigger member 27 moves in the disc ejection direction, but the movement of the slide plate 26 is restricted after returning to the initial position. At this time, the straight line connecting the centers of the shaft 65 at the high position and the engaging protrusion 66 at the low position of the rotating piece 64 is in the disc insertion direction as shown in FIGS. Since it is inclined, when the engaging projection 66 is pushed by the low wall 37, the rotating piece 64 rotates about the shaft 65 as a fulcrum, and the engaging protrusion 66 rises along the low wall 37, and FIG. As shown in FIG.
At this time, the projecting portion 33 slides on the sliding contact portion 47 and moves in the disc ejection direction, and then comes off the sliding contact portion 47 and falls into the recess 46. Then, the trigger member 27 is rotated counterclockwise again by the torsion spring 50 as shown in FIG. 4, and the rack 29 is separated from the operating gear 18.

Incidentally, in the process from FIG. 4 to FIG. 5, when the trigger member 27 is pushed by the disk D and rotates clockwise, the protrusion 33 also rotates clockwise, but the rack 29 is still in the operating gear 18. When the trigger member 27 is pushed by the disc and moves in the disc insertion direction without being engaged, the projecting portion 33 abuts on the guiding portion 48 and then the sliding contact portion 47 along the guiding portion 48. Will move smoothly.
Further, when the disk D pushes the contact portion 28 of the trigger member 27, the protrusion 33 contacts the guide portion 48 even when the trigger member 27 first moves in the disk insertion direction prior to rotation. After that, it smoothly moves to the sliding contact portion 47 along the guide portion 48 and the rack 29 is engaged with the operation gear 18.
In addition, the guidance | induction part 48 is good also as not only a linear inclination but curved shape.

Next, a second embodiment for carrying out the present invention will be described with reference to FIGS.
This embodiment is different from the first embodiment in that the urging means 70 is configured by a plate spring 72 extending from a part of the trigger member 71 and a spring receiver 74 provided on the chassis 73. Other configurations are the same as those of the first embodiment, and the drawings and description are omitted. That is, as shown in FIG. 11, the trigger member 71 has a substantially L-shaped leaf spring 72 integrally formed of synthetic resin at an end portion having the contact portion 75. On the other hand, a spring receiver 74 is cut and formed on the chassis 73. The spring receiver 74 has a spring receiving surface that is long in the disk insertion direction. Before the disk is inserted, an extension end of the plate spring 72 extending in the disk insertion direction is formed on the spring receiving surface. It is made to contact elastically from the left.

Further, the elastic force of the leaf spring 72 urges the pivot fulcrum of the trigger member 71 in the disc ejecting direction and also urges the rack 77 in a direction to separate the operating gear 78 from the operating gear 78. Therefore, when the disc D is inserted, the trigger member 71 is pushed clockwise by the abutting portion 75 of the disc D and rotates clockwise, and the rack 77 is engaged with a transmission gear (not shown). When the trigger member 71 is moved in the disc insertion direction by the rotation of the operating gear 78, the leaf spring 72 comes off from the spring receiver 74 as shown in FIG.

According to this configuration, when the trigger member 71 moves in the disc insertion direction by moving the trigger member 71 in the disc insertion direction as the disc is inserted, the plate spring 72 is disengaged from the spring receiver 74. The load on the motor (not shown) due to 72 can be reduced. Therefore, smooth engagement between the rack 77 and the operating gear 78 is possible.

Next, a third embodiment for carrying out the present invention will be described with reference to FIG.
This embodiment is different from the first embodiment in that the meshing control means is composed of a single torsion spring type reversal spring 80, and the other configuration is the same as that of the first embodiment. Drawing and description are omitted. That is, the torsion spring type reversing spring 80 constituting the meshing control means has one end attached to the slide plate 81 and the other end attached to the trigger member 82. One end of the reversing spring 80 is always positioned on the disc insertion direction side with respect to the rotation fulcrum 83 of the trigger member 82, and the other end is on the left in the figure from a straight line L connecting one end and the rotation fulcrum 83 of the trigger member 82. On the other hand, it is positioned closer to the disc insertion direction than the pivot fulcrum 83 and closer to the disc ejection direction than the one end. Then, when the trigger member 82 is rotated by the contact portion 84 being pushed by the disk, the other end of the reversing spring 80 is positioned on the right side beyond the straight line L.

With this configuration, before the disk is inserted, the reversing spring 80 urges the rotation fulcrum 83 of the trigger member 82 in the disk discharge direction, and at the same time, the trigger member 82 is counterclockwise (the rack 85 is moved to the operating gear 86). Urged to rotate in a direction away from the head. When the abutting portion 84 is pushed by the disk, the trigger member 82 reverses, and the rotation biasing direction with respect to the trigger member 82 is switched to bias the rack 85 in a direction to mesh with the operating gear 86. The meshing state between the rack 85 and the operating gear 86 is maintained. Therefore, the engagement control means can be constituted by a single reversing spring 80, and the structure of the engagement control means is further simplified.

1 is a perspective view showing a disk reproducing device in a first embodiment of the present invention. FIG. The top view of a floating mechanism. The top view which shows the relationship between the trigger member before a disc insertion, an operating gear, and a torsion spring. The top view which shows the relationship between the trigger member at the time of disc insertion, an operating gear, and a torsion spring. The figure which shows a power transmission path typically. The perspective view which shows the conveyance roller periphery. The side view which shows the relationship between the trigger member and a slide board before disc insertion. The side view which shows the relationship with the trigger member and slide board after disk insertion. The perspective view which shows the relationship between a slide plate and a rotation piece. The top view which shows the relationship between the trigger member before the disk insertion in 2nd embodiment of this invention, an urging means, and an operating gear. The top view which shows the relationship between the trigger member after a disc insertion, an urging means, and an operating gear. The top view which shows the relationship between the trigger member in the 3rd embodiment of this invention, a reversal spring, and an operation | movement gear.

Explanation of symbols

8, 73 Chassis 9 Pickup 15 Motor 18, 78, 86 Actuation gear 23 Switching means 26, 81 Slide plates 27, 71, 82 Trigger members 28, 75, 84 Abutting portions 29, 77, 85 Rack 30 Shaft portion 31 Retaining Part 33 Sliding contact part 41 Guide groove 42 Removable opening 47 Sliding contact part 49 Engagement holding means 50, 70 Energizing means 51 Engagement control means 52, 76, 83 Rotating fulcrum 72 Leaf spring 74 Spring receiver 80 Reversing spring
D disc

Claims (6)

On the chassis (8, 73) on which the pickup (9) is mounted, the motor (15), the operating gear (18, 78, 86), and switching means (23 for transmitting the power of the motor to the pickup or the operating gear) And a slide plate (26, 81) that moves in the disc insertion direction as needed by the rotational force of the operating gear to operate the disc reproduction assisting means involved in loading and unloading the disc (D). In the disc reproducing apparatus, a pivot fulcrum (52, 76, 83) is provided between the rack (29, 77, 85) and the contact portion (28, 75, 84), and the pivot fulcrum is used as the chassis. Trigger members (27, 71, 82) mounted to be freely rotatable and movable in the disk insertion direction, and before rotation of the disk, the rotation fulcrum is urged in the disk ejection direction and the rack is operated. The disk is inserted in the direction of moving away from the gear, and the disk inserted by inserting the disk presses the contact portion of the trigger member, the trigger member rotates, and the rack meshes with the operation gear to operate the operation. When the trigger member moves in the disc insertion direction in response to the rotational force of the gear, there is provided an engagement control means (51) for maintaining the engagement state, and the trigger member receives the rotational force of the operating gear and in the disc insertion direction. A disc reproducing apparatus, wherein the slide plate is caused to follow the trigger member and move in the same direction when moving to.   The engagement control means urges the rotation fulcrum of the trigger member in the disk ejection direction and the rotation urging means (50, 70) in the direction of separating the rack from the operating gear before inserting the disk. And a mesh holding means (49) for holding the engagement state when the trigger member moves in the disk insertion direction when the rack is engaged with the operating gear by inserting the disk. The disc playback apparatus described in 1.   The engagement holding means includes a slidable contact portion (33) provided on the trigger member and a slidable contact portion (47) provided on the chassis, and is in slidable contact when the trigger member moves in the disc insertion direction. 3. The disk reproducing apparatus according to claim 2, wherein the portion is brought into sliding contact with the sliding contact portion to maintain the meshed state between the rack and the operating gear.   4. The disk reproducing apparatus according to claim 3, wherein the slidable contact portion is formed in the chassis so as to be long in the disk insertion direction, and the slidable contact portion is a protrusion that appropriately slidably contacts the slidable contact portion. .   3. The disk reproducing apparatus according to claim 2, wherein the biasing means is a spring.   The trigger member has a shaft portion (30) having a circular cross section with the center as the rotation fulcrum, and has a retaining portion (31) at the tip of the shaft portion, and the chassis uses the shaft portion as a disk. The disc reproduction according to claim 1, further comprising a guide groove (41) for guiding in the insertion direction, and an attachment / detachment opening (42) into which the retaining portion can be inserted at one end of the guide groove. apparatus.