JP2007323729A - Disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "disk player" surely transmitting power of a single drive motor to a disk conveying mechanism and a pickup transfer mechanism with an easy configuration. <P>SOLUTION: In the disk player wherein the power of the drive motor 16 is selectively transmitted to either a 1st gear train 18 on the disk conveying mechanism side or a 2nd gear train 19 of the pickup transfer mechanism via a power switching mechanism having a planetary gear train 24, the power switching mechanism 17 includes the relay member 18 arranged in the middle of movement of the planetary gear 23 of the planetary gear train 24, and a teeth part 28a constituting a part of internal gear centering around the axial center of a sun gear 22 on this relay member 18, and also the teeth part 28a of the relay member 28 is slanted so that the tooth height is gradually decreased in the tooth thickness direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disc player that records and / or reproduces information on a disc such as a CD or a DVD, and more particularly to a disc player that performs a disc loading operation and a pickup transport operation by a common drive motor. is there.

  In-vehicle disc players are equipped with a disc transport mechanism that automatically transports a disc between an eject position and a play position, a pickup transport mechanism that transports a pickup in the radial direction of the disc, and the like. A technique is known in which the disc transport mechanism and the pickup transport mechanism are operated by a common drive motor (see, for example, Patent Document 1).

  FIG. 11 is a plan view of the main part for explaining the prior art disclosed in the above-mentioned Patent Document 1. In the disc player shown in FIG. 11, the power output from the drive motor 100 is supplied via the power switching mechanism 101. It is selectively transmitted to one of the first gear train 102 and the second gear train 103. The power switching mechanism 101 includes a sun gear 104 connected to the output shaft of the drive motor 100 via a reduction gear train, a rotating arm 106 that pivotally supports a planetary gear 105 meshing with the sun gear 104, and a planetary gear 105. The planetary gear 105 can be engaged with and disengaged from the gear 102 a of the first gear train 102 and the gear 103 a of the second gear train 103. The rotating arm 106 can swing in the direction of the arrow AB about the axis of the sun gear 104, but is constrained to the end position in the swinging direction by first and second lock members (not shown). It has become. The relay member 107 is engraved with a tooth portion 107a that forms part of an internal gear centered on the axis of the sun gear 104. The relay member 107 is swung by a support member 108 made of an elastic material such as rubber. Supported as possible. The first gear train 102 is connected to rollers, sliders, and the like, which are constituent members of a disk transport mechanism (not shown), and the power of the drive motor 100 is changed from the planetary gear 105 of the power switching mechanism 101 to the first gear train 102. The first gear train 102 operates the disk transport mechanism to automatically transport the disk in the insertion direction or the ejection direction. A lead screw 109, which is a component of the pickup transfer mechanism, is connected to the final gear of the second gear train 103, and the power of the drive motor 100 is changed from the planetary gear 105 of the power switching mechanism 101 to the second gear. When transmitted to the first gear 103a of the row 103, the lead screw 109 is rotated by the second gear row 103 to transfer a pickup (not shown) in the radial direction of the disk.

  FIG. 11 shows a standby state in which no disc is inserted. In this standby state, the rotating arm 106 is restrained by the first lock member at the end position in the direction of arrow A, so that the planetary gear 105 is in the first state. Meshing with the first gear 102a of the gear train 102 is maintained. When the disk is inserted from this state and the drive motor 100 rotates in one direction, the power of the drive motor 100 is transmitted from the sun gear 104 of the power switching mechanism 101 to the gear 102a of the first gear train 102 via the planetary gear 105. Therefore, the roller is rotated by the first gear train 102 and the disk is automatically conveyed in the insertion direction. Then, when the disc is conveyed above the play position, the slider starts to move forward from the retracted position by the first gear train 102, and the disc is clamped by the slider, and the first locking member Is driven to release the restraint of the rotating arm 106. As a result, the rotating arm 106 swings in the direction of arrow B in response to the reaction force from the planetary gear 105 that attempts to rotate the gear 102a, and the planetary gear 105 pivotally supported on the rotating arm 106 is the sun gear. The movement starts in the direction of arrow B while meshing with 104.

  At this time, the planetary gear 105 is moved and supported by meshing with the tooth portion 107a of the relay member 107 immediately before leaving the gear 102a, and meshed with the first gear 103a of the second gear train 103 while maintaining this state. The power of the drive motor 100 is reliably switched from the first gear train 102 to the second gear train 103 side. Then, when the lead screw 109 starts to rotate in one direction by the second gear train 103 and the pickup (not shown) is moved outward in the radial direction of the disk by the lead screw 109, the pickup is moved to the second lock (not shown). The member is driven to restrain the rotating arm 106 at the end position in the direction of arrow B, and the meshing between the planetary gear 105 and the gear 103a is maintained and a play state is established. In this play state, the pickup is transferred to the outer side and the inner side in the radial direction of the disk by rotating the drive motor 100 in both forward and reverse directions, and information is recorded and / or reproduced on the disk.

  Further, when an unillustrated eject button is inserted in the play state, the drive motor 100 rotates in the other direction and the reverse operation is performed. That is, when the pickup is moved inward in the radial direction of the disk by the rotation of the lead screw 109, the second lock member is driven by the pickup, so that the restraint of the rotating arm 106 by the second lock member is released. Is done. As a result, the rotation arm 106 receives a reaction force from the planetary gear 105 that attempts to rotate the gear 103 a and swings in the direction of arrow A. The planetary gear 105 is engaged with the sun gear 104 together with the rotation arm 106. Start moving in the direction of arrow A. Also at this time, the planetary gear 105 is moved and supported by meshing with the tooth portion 107a of the relay member 107 immediately before leaving the gear 103a, and meshed with the gear 102a of the first gear train 102 while maintaining this state. The power is reliably switched from the second gear train 103 to the first gear train 102 side. When the first gear train 102 starts moving the slider from the forward position to the backward direction, the first lock member is first driven to constrain the rotary arm 106 to the end position in the direction of arrow A, and then the disk clamp After the operation is released, the roller is reversely rotated by the first gear train 102 and the disc is automatically conveyed in the ejection direction.

As another conventional technique, a shaft is attached to the rotating arm as a power switching mechanism that selectively transmits the power of the drive motor to the first gear train on the disk transport mechanism side and the second gear train on the pickup transfer mechanism side. The supported planetary gear can be engaged / disengaged only with respect to the first gear train, and another gear that is always meshed with the sun gear with the swinging motion of the rotating arm is provided with respect to the second gear train. A disc player that can be engaged and disengaged is also known (for example, see Patent Document 2). This power switching mechanism also includes a relay member disposed in the course of movement of the planetary gear, and the tooth portion of the relay member immediately before the planetary gear is separated from the first gear of the first gear train or just before meshing with the gear. The power of the drive motor is surely switched between the first gear train and the second gear train.
JP 2000-298903 A JP 2005-78682 A

  In the disk player disclosed in Patent Document 1 among the above-described prior arts, a relay member disposed during the movement of the planetary gear is supported on a chassis so as to be swingable by a support member made of an elastic material such as rubber. Therefore, even if the tooth tip of the planetary gear rotating at the time of switching the power of the drive motor jumps at a position that coincides with the tooth tip of the relay member, the relay member is bent in the swinging direction to Biting can be prevented. However, since it is necessary to integrate the relay member into a support member made of rubber or the like and support it on the chassis, the relay member and the support member become larger as a whole, and a large number of gears including sun gears and planetary gears. There is a problem that it becomes difficult to dispose the relay member and the support member in the limited space of the power switching mechanism having the above.

  On the other hand, in the disc player disclosed in Patent Document 2, since the relay member disposed in the middle of the movement of the planetary gear is directly fixed on the chassis, the structure is simplified by integrally forming the relay member on the chassis. However, if the tooth tip of the rotating planetary gear jumps in at a position that matches the tooth tip of the relay member, the tooth tips of both sides abut on the entire surface in the tooth width direction and ride on. As a result, there is a problem that the planetary gear in the middle of movement is stuck on the tooth portion of the relay member and stops, or both tooth tips are destroyed.

  The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to reliably transmit the power of a single drive motor to the disk transport mechanism and the pickup transport mechanism with a simple configuration. To provide a disc player.

  In the present invention, the power of the drive motor is selectively transmitted to the first gear train on the disk transport mechanism side and the second gear train on the pickup transfer mechanism side via a power switching mechanism having a planetary gear train. None, the tooth portion of the relay member disposed during the movement of the planetary gear, which is a component of the power switching mechanism, is inclined so that the tooth height dimension gradually decreases along the tooth width direction.

  In the disc player of the present invention, the power of the drive motor is selectively transmitted to the first gear train on the disc transport mechanism side and the second gear train on the pickup transfer mechanism side via a power switching mechanism having a planetary gear train. Since the tooth portion of the relay member disposed during the movement of the planetary gear that is a constituent member of the power switching mechanism is inclined so that the tooth height dimension gradually decreases along the tooth width direction, Even if the tip of the planetary gear rotating at the time of switching the power of the drive motor jumps in at the position that coincides with the tip of the relay member, the tips of the two are only point-contacted in the tooth width direction. The gear meshes normally without riding on the teeth of the relay member. Therefore, there is no problem such as collision noise between the planetary gear and the tooth tip of the relay member or destruction of the tooth tip, and the power of the single drive motor is reliably transmitted to the disk transport mechanism and the pickup transport mechanism with a simple configuration. be able to.

  The present invention includes a drive motor, a power switching mechanism having a planetary gear train operated by the rotation of the drive motor, and a disk transport mechanism connected to the output side of the planetary gear train via a first gear train. A pickup transfer mechanism connected to the output side of the planetary gear train via a second gear train, and the power of the drive motor is connected to the first gear train and the second gear via the planetary gear train. In the disc player configured to be selectively transmitted to any one of the gear trains, the power switching mechanism includes a relay member disposed during the movement of the planetary gears of the planetary gear train, The relay member is engraved with a tooth portion constituting a part of the internal gear centered on the axis of the sun gear of the planetary gear train, and the tooth height of the relay member is determined by the tooth width dimension. Gradually smaller along the direction And configured to be inclined so that.

  According to the disc player configured as described above, even if the tooth tip of the planetary gear rotating at the time of switching the power of the drive motor jumps in a position where it coincides with the tooth tip of the relay member, the tooth tips of both the gear teeth Since only the point contact is made in the width direction, the planetary gear meshes normally without riding on the teeth of the relay member. Therefore, there is no problem such as collision noise between the planetary gear and the tooth tip of the relay member or destruction of the tooth tip, and the power of the single drive motor is reliably transmitted to the disk transport mechanism and the pickup transport mechanism with a simple configuration. be able to.

  In the above configuration, the planetary gear may be detachable from the first gear train and the second gear train, but the pick-up transport mechanism transports the pick-up along the guide shaft in the radial direction of the disk. A second gear train is formed by a rack engraved on the transfer member and a pinion that always meshes with the sun gear of the planetary gear train, and the output of the planetary gear train is transmitted to the first gear train. The planetary gear meshes with the first gear train and the mesh between the pinion and the rack is released, and when the output of the planetary gear train is transmitted to the second gear train, the pinion meshes with the rack. When the meshing between the planetary gear and the first gear train is released, the power switching mechanism according to the present invention is preferably applicable to a pickup transfer mechanism using a pinion and a rack. .

  In the above configuration, the relay member and the chassis may be integrated with separate members. However, if the relay member is integrally formed with a synthetic resin chassis on which the drive motor is mounted, the relay member needs to be added to the chassis. Is preferred. In this case, if the tooth tip surface of the relay member is inclined at an acute angle with respect to a virtual line extending perpendicularly from the plate surface of the chassis, the relay member does not become an undercut shape, thus simplifying the mold structure for chassis molding. This is preferable.

  The embodiment will be described with reference to the drawings. FIG. 1 is a plan view of an in-vehicle disc player according to an embodiment of the present invention, and FIG. 2 is a perspective view of the disc player as viewed from the back side with the frame of FIG. 3 and FIG. 3 are diagrams for explaining the operation of the disc transport mechanism provided in the disc player, FIG. 4 is a rear view of a guide member provided in the disc transport mechanism, FIG. 5 is an exploded perspective view of the disc transport mechanism, and FIG. FIG. 7 is an explanatory view of the power switching mechanism provided in the disc player, and FIG. 8 is a diagram of the planetary gear and relay member provided in the power switching mechanism. FIG. 9 is a perspective view of the planetary gear and the relay member.

  The present embodiment is applied to an in-vehicle CD player as an example of a disc player. As shown in FIGS. 1 and 2, the CD player includes a base member 1 made of a synthetic resin, which is a structural member of a chassis. ing. Although not shown in FIG. 2, the base member 1 is elastically supported by a plurality of dampers 3 on a box-like frame 2 that forms the outer shell of the main body device. A lock pin (not shown) is projected.

  A metal support plate 4 is fixed to the front upper surface of the base member 1 with screws. As shown in FIG. 3, a synthetic resin guide top 5 is fixed to the lower surface of the support plate 4 such as a snap joint. It is integrated using means. A guide member 6 is constituted by the support plate 4 and the guide top 5, and a pair of auxiliary rollers 7 are rotatably supported on the left and right sides of the guide member 6. These auxiliary rollers 7 are cylindrical bodies formed of synthetic resin. As shown in FIG. 4, a straight line P connecting the rotation axes of both auxiliary rollers 7 is with respect to the conveying direction (arrow X1-X2 direction) of the disk D. Are orthogonal. The rotating shaft of the auxiliary roller 7 is sandwiched between the support plate 4 and the guide top 5, and the rotating portion of the auxiliary roller 7 is exposed from a rectangular opening 5 a provided in the guide top 5.

  A disc transport space S is defined between the guide member 6 and the inner bottom surface of the base member 1, and the disc transport space S is formed in a horizontally long shape formed on the front plate of the frame body 2 as shown in FIG. 3. It faces the disc insertion slot 2a. In addition, a rubber roller 8 is disposed inside the disk transport space S, and the roller 8 is driven to rotate in both forward and reverse directions by the power of a drive motor described later. The roller 8 is formed in a tapered shape that decreases in diameter as it approaches the central portion, and is rotatably supported at the rear end portion of the metal roller bracket 9. Pins 9 a and 9 b are planted at the front and rear ends of both side walls of the roller bracket 9, and the roller bracket is formed by sandwiching the front end side pins 9 a between the left and right side walls of the base member 1 and the support plate 4. 9 is rotatably supported by the base member 1. The rear end side pin 9b is inserted into a cam hole of a slider, which will be described later, and the roller bracket 9 is rotated (swinged) about the pin 9a as the slider moves forward and backward. Yes. Further, a bent portion 9c is formed on the front side of the central portion of the roller bracket 9, and the roller bracket 9 is formed by stretching a spring 10 between the bent portion 9c and the bottom surface of the base member 1. The rear end of the spring 10 is urged by the elastic force of the spring 10 in the direction approaching the lower surface of the guide top 5. FIG. 3A shows a standby state in which the disk D is not inserted. In this standby state, the outer peripheral surface of the roller 8 is pressed against the outer peripheral surface of the auxiliary roller 7 due to the elastic force of the spring 10. In the play state shown in FIG. 3B, the roller 8 descends with the rotation of the roller bracket 9 and separates from the auxiliary roller 7. The guide member 6, the roller 8 and the roller bracket 9 constitute a disk transport mechanism.

  As shown in FIGS. 5 and 6, a shaft hole portion 9d is formed on the front side of both side portions of the roller bracket 9, and the shaft portion 11a of the erroneous insertion preventing member 11 is inserted into the shaft hole portion 9d. Thus, the pair of erroneous insertion preventing members 11 are rotatably supported on both side portions of the roller bracket 9. These erroneous insertion prevention members 11 are molded products of synthetic resin, and a cam groove 11b is formed on one side surface thereof, and the cam groove 11b is inserted into a protrusion 1a provided on the front side of the inner bottom surface of the base member 1. Has been. Further, a clearance groove 11 c is formed at the center of the erroneous insertion preventing member 11, and the clearance groove 11 c is inserted into a guide wall 1 b erected on the base member 1. Further, a thin elastic piece 11d that extends rearward in a cantilevered manner is integrally formed on the rear end side of the erroneous insertion preventing member 11, and this elastic piece 11d is a roller bracket located behind the shaft hole 9d. It faces the lower surface of 9. Thus, by rotatably supporting the pair of erroneous insertion preventing members 11 on both sides of the roller bracket 9 and engaging the cam groove 11c of the erroneous insertion preventing member 11 and the protrusion 1a of the base member 1, The erroneous insertion preventing member 11 enters and exits the disk transport space S according to the swing angle of the roller bracket 9, and the tip of the elastic piece 11 d of the erroneous insertion preventing member 11 comes in contact with and separates from the lower surface of the roller bracket 9. ing.

  Specifically, in the standby state shown in FIGS. 3 (A) and 6 (A), the roller bracket 9 is in a forward inclined posture in which the rear end side supporting the roller 8 is raised, and the front end side of the roller bracket 9 The mis-insertion preventing member 11 supported by the base member 1 is maintained in a substantially horizontal posture by shifting the projection 1a of the base member 1 to one end of the cam groove 11b. As a result, a disk transport space S that allows insertion of the disk D is secured above the erroneous insertion prevention member 11, and the tip of the elastic piece 11 d of the erroneous insertion prevention member 11 is in elastic contact with the lower surface of the roller bracket 9. On the other hand, in the play state shown in FIG. 3 (B) and FIG. 6 (B), as the roller bracket 9 is swung so as to be in a substantially horizontal posture, the protrusion 1a starts from one end of the cam groove 11b. Shifting to the other end, the erroneous insertion preventing member 11 is in an upright state. As a result, the pair of erroneous insertion preventing members 11 protrudes into the left and right side portions of the disc transport space S, and the distal ends of the elastic pieces 11 d of the erroneous insertion preventing member 11 are separated from the lower surface of the roller bracket 9.

  1 and 2, the left and right rear ends of the clamp arm 12 are pivotally supported on the rear wall of the base member 1, and the clamper 13 rotates on the front side of the central portion of the clamp arm 12. Supported as possible. A spindle motor 14 and a pickup 15 constituting the drive mechanism and the drive motor 16 described above are mounted on the back side of the base member 1, and the rotation shaft of the spindle motor 14 faces the lower surface of the clamper 13. A turntable (not shown) is fixed. Further, the power switching mechanism 17 and the first and second gear trains 18 and 19 are mounted on the back side of the base member 1, and the power output from the drive motor 16 is the power as described later. It is selectively transmitted to one of the first gear train 18 and the second gear train 19 via the switching mechanism 17.

  Synthetic resin sliders 20 are disposed outside the left and right side walls of the base member 1, and both the sliders 20 are supported so as to be movable in the front-rear direction (X1-X2 direction) of the base member 1. One slider 20 is operated by the first gear train 18, and the movement of the slider 20 is transmitted to the other slider 20 via the link member 21. That is, one slider 20 shown on the right side in FIG. 2 is a drive side slider operated by using the drive motor 16 as a drive source, and the other slider 20 shown on the left side in FIG. 2 is synchronized with the drive side slider 20. The driven slider is operated. Both sliders 20 are formed with cam holes 20a, lock grooves 20b, protrusions 20c, and the like, and as described above, the pins 5b of the roller bracket 9 move relative to each other within the cam holes 20a as the sliders 20 move forward and backward. By doing so, the roller bracket 9 is rotated to move the roller 8 up and down. In addition, the lock groove 20b is engaged with and disengaged from the lock pin (not shown) of the frame body 2 as the sliders 20 move back and forth, so that the base member 1 is locked / unlocked with respect to the frame body 2. When the switching mechanism is operated, the protrusions 20c are engaged with and disengaged from the cams 12a formed on both side walls of the clamp arm 12 as the sliders 20 move back and forth, whereby the clamp arm 12 is rotated and the clamper 13 is moved. It is designed to move up and down.

  As shown in FIG. 7, the power switching mechanism 17 includes a planetary gear train 24 having a sun gear 22 and a planetary gear 23, and an arrow AB direction centering on the axis of the sun gear 22 around the planetary gear 23. A pivot arm 25 that can swing to the right, first and second lock levers 26 and 27 that can restrain the pivot arm 25 at the end position in the swing direction, and the planetary gear 23 being moved. The sun gear 22 is provided on a gear 41 that is always meshed with a worm 40 fixed to the output shaft of the drive motor 16.

  The planetary gear 23 can be engaged with and disengaged from the first gear 18a of the first gear train 18 and is not shown, but the final gear of the first gear train 18 is a component of the disk transport mechanism. Is meshed with a gear fixed to the rotating shaft of the roller 8. The gear 18 b in the middle of the first gear train 18 can be engaged with and disengaged from the rack 29 a of the slider drive member 29, and the drive-side slider 20 is moved forward and backward through the slider drive member 29. ing. The slider drive member 29 includes a holding member 30 that moves back and forth on the back surface of the base member 1 and a meshing member 31 that is movably mounted on the holding member 30. The meshing member 31 is a spring. It is urged in the X1 direction by 32 elastic forces. Cam holes 30a and 31a are formed in the holding member 30 and the engagement member 31, respectively. When the pin 26a of the first lock lever 26 is engaged with the cam holes 30a and 31a, the first lock lever is formed. 26 rotates as the slider drive member 29 moves. A trigger pin 33 is disposed at the end of the meshing member 31 in the X1 direction. The trigger pin 33 is a detection member (not shown) that is rotated by the edge of the disk D inserted in the apparatus. It is planted in. When the engagement member 31 is pressed in the X2 direction by the trigger pin 33, the gear 18b of the first gear train 18 is engaged with the rack 29a of the slider drive member 29 to transmit power.

  Another gear 34 is always meshed with the gear 41 of the planetary gear train 24, and a pinion 35 that is the first gear of the second gear train 19 is provided on the gear 34. The pinion 35 can be engaged with and disengaged from the rack 36 that is the final gear of the second gear train 19, and this rack 36 is engraved on a transfer member 37 that is a component of the pickup transfer mechanism. The transfer member 37 is provided with a drive projection 37 a that can be engaged with and disengaged from one end of the second lock lever 27, and the other end of the second lock lever 27 is a cam hole 25 a formed in the rotating arm 25. Is engaged. As shown in FIG. 2, a guide shaft 38 extending in the radial direction (arrow α1-α2 direction) of the disk D is fixed to the back surface of the base member 1, and the pickup 15 and the transfer member 37 are inserted into the guide shaft 38. Thus, the transfer member 3 is urged toward the outer peripheral side (in the direction of the arrow α1) by the elastic force of the spring 39 and is brought into close contact with the pickup 15.

  The relay member 28 is a resin molded product integrally formed with the base member 1, and the power output from the drive motor 16 is either the first gear train 18 or the second gear train 19 via the power switching mechanism 17. When switched to one side, the planetary gear 23 meshes with the relay member 28 and is supported for movement. As shown in FIGS. 8 and 9, the relay member 28 is provided with two tooth portions 28a forming a part of the internal gear centered on the axis of the sun gear 22, and these tooth portions 28a. Is inclined at a predetermined angle θ so that the tooth height dimension gradually decreases along the tooth width direction, in other words, the tooth height dimension of the tooth portion 28a decreases as the distance from the plate surface of the base member 1 increases. . For this reason, the relay member 28 integrally formed with the base member 1 made of synthetic resin does not have an undercut shape, and the mold structure of the chassis 1 can be simplified. In the case of the present embodiment, the tooth tip surface of the tooth portion 28a is inclined at an acute angle with respect to the virtual line O extending perpendicularly from the plate surface of the base member 1 so that the angle θ is about 13 degrees. Therefore, as shown in FIG. 9, even if the tooth tip 23a of the planetary gear 23 jumps at a position that coincides with the tooth portion 28a of the relay member 28 when the power of the drive motor 16 is switched, the tooth tips of both planets 23 are in the tooth width direction. Therefore, as shown in FIG. 8, the planetary gear 23 is normally meshed without riding on the tooth portion 28 a of the relay member 28.

  Next, the operation of the CD player configured as described above will be described.

  At the time of ejection (standby state) when the disk D is not inserted into the main unit, the planetary gear 23 of the planetary gear train 24 is the first gear 18a of the first gear train 18 as shown in FIG. This state is maintained by the first lock member 26 that restrains the rotating arm 25. Further, since the drive protrusion 37a of the transfer member 37 is engaged with the second lock lever 27, the transfer member 37 resists the elastic force of the spring 39 and is located on the innermost end side of the guide shaft 38 (in the direction of the arrow α2). ) And the meshing between the pinion 35 and the rack 36 is released. Therefore, the power of the drive motor 16 can be transmitted from the sun gear 22 of the power switching mechanism 17 to the first gear train 18 via the planetary gear 23, and the power transmission from the drive motor 16 to the second gear train 19 is It is in a blocked state.

  In such a standby state, both sliders 20 are in the forward position on the front side of the base member 1, and the lock grooves 20 b of these sliders 20 are engaged with the lock pins of the frame body 2. The base member 1 on which the entire mechanism is mounted is in a locked state in which it is fixedly supported with respect to the frame 2. Further, since the protrusions 20c of both sliders 20 are in contact with the cam 12a of the clamp arm 12, the clamp arm 12 is rotated upward and the clamper 13 is separated from the turntable. Further, the pin 9b of the roller bracket 9 is in the upper position of the cam hole 20a of both sliders 20, and the outer peripheral surface of the roller 8 receives the elastic force of the spring 10 as shown in FIG. Since it is pressed against the outer peripheral surface of the auxiliary roller 7 exposed from the lower surface, rattling of the auxiliary roller 7 with respect to the guide member 6 is suppressed by the roller 8 so that rattle noise due to rattling of the auxiliary roller 7 does not occur. It has become. Further, in this standby state, the roller bracket 9 is in a forward inclined posture in which the rear end side supporting the roller 8 is raised, and as shown in FIGS. 3 (A) and 6 (A), the front end side of the roller bracket 9 is provided. Since the pair of erroneous insertion preventing members 11 supported by the two are maintained in a substantially horizontal posture, a disc transport space S that allows insertion of the disc D is secured above both erroneous insertion preventing members 11. In addition, since the tip of the elastic piece 11d integrally formed with the erroneous insertion preventing member 11 is elastically contacted with the lower surface of the roller bracket 9, the backlash of the roller bracket 9 in the standby state is suppressed, and the backlash of the roller bracket 9 is reduced. The rattle noise caused by the sticking is not generated.

  In this state, when the disc D is inserted into the main body of the apparatus from the disc insertion port 2a of the frame 2, the disc D reaches the roller 8 through the disc transport space S above the erroneous insertion preventing members 11, during this time. Since the disk detection means (not shown) is operated by inserting the disk D, the drive motor 16 starts to rotate in one direction based on the signal from the disk detection means. In this case, since the power of the drive motor 16 is maintained to be transmitted from the sun gear 22 of the power switching mechanism 17 to the first gear train 18 via the planetary gear 23, the final gear of the first gear train 18 is maintained. The roller 8 begins to rotate in one direction by the driving force from the stepped gear, and the disk D sandwiched between the roller 8 and the auxiliary roller 7 is automatically conveyed in the insertion direction (arrow X1 direction) by the rotational force of the roller 8. . Thus, when the disk D is transported to above the play position (a position where the center hole of the disk D is between the turntable and the clamper), a detection member (not shown) is rotated by the edge of the disk D. Since the trigger pin 33 provided on the detection member presses the meshing member 31 of the slider driving member 29 toward the front side of the base member 1, the meshing member 31 compresses the spring 32 against the holding member 30. Moving in the direction of the arrow X2, the gear 18b of the first gear train 18 meshes with the rack 29a. As a result, the holding member 30 and the meshing member 31 move integrally in the direction of the arrow X2, and accordingly, the drive-side slider 20 starts to move in the direction of the arrow X1 from the forward movement position toward the backward movement position. In this case, since the movement of the drive-side slider 20 is transmitted to the driven-side slider 20 via the link member 21, the drive-side and the driven-side slider 20 move synchronously from the forward movement position to the backward movement position.

  While the slider 20 moves to the end position in the backward direction in this way, the lock groove 20b of both sliders 20 is separated from the lock pin of the frame body 2, so that the base member 1 is elastically attached to the frame body 2 by the plurality of dampers 3. It will be in the unlocked state that was supported. Further, since the pin 9b of the roller bracket 9 moves from the upper position to the lower position of the cam hole 20a of both sliders 20, the roller bracket 9 resists the elastic force of the spring 10 as shown in FIG. The roller 8 is rotated downward, and the roller 8 supported on the rear end side of the roller bracket 9 is separated from the lower surface of the disk D. Further, at this timing, the protrusions 20c of both sliders 20 are separated from the cam 12a of the clamp arm 12, so that the clamp arm 12 supporting the clamper 13 rotates downward, and the center of the disk D is between the clamper 13 and the turntable. Clamped.

  Further, the slider driving member 29 for driving the slider 20 moves to the end position in the X2 direction when the clamping operation of the disk D is completed, and accordingly, the power switching mechanism 17 is moved from FIG. 7 (A) to FIG. 7 (B). It will be in the state shown in That is, when the pin 26a of the first lock lever 26 moves to the end of the cam hole 30a of the holding member 30, the first lock lever 26 rotates in the clockwise direction in FIG. Is released. As a result, the rotating arm 25 swings in the direction of arrow A in response to the reaction force from the planetary gear 23 that attempts to rotate the gear 18a, and the planetary gear 23 pivotally supported on the rotating arm 25 is the sun gear. 22 starts to move in the direction of arrow A while being engaged. Further, as the pivot arm 25 swings in the direction of arrow A, the second lock lever 27 engaged with the cam hole 25 a rotates clockwise, and the second lock lever 27 drives the transfer member 37. In order to press the protrusion 37a in the direction of the arrow α1, the rack 36 of the transfer member 37 is engaged with the pinion 35 of the gear 34 under the elastic force of the spring 39. Accordingly, at this time, the power of the drive motor 16 is transmitted from the sun gear 22 of the power switching mechanism 17 to the second gear train 19 having the pinion 35 and the rack 36 and from the drive motor 16 to the first gear train 18. The power transmission of is cut off and a play state is entered.

  At the time of such power switching, the planetary gear 23 meshes with and supports the tooth portion 28a of the relay member 28 immediately before leaving the gear 18a, and the pinion 35 meshes with the rack 36 while maintaining this state. The first gear train 18 is reliably switched to the second gear train 19 side. At this time, as shown in FIG. 9, even if the tooth tip 23 a of the rotating planetary gear 23 jumps in at a position coincident with the tooth portion 28 a of the relay member 28, both tooth tips are pointed in the tooth width direction. As shown in FIG. 8, the planetary gear 23 normally meshes without riding on the teeth 28a of the relay member 28, as shown in FIG. Problems such as tooth tip destruction will not occur.

  In this play state, the spindle motor 14 is driven to rotate the disk D, and the drive motor 16 is rotated in both forward and reverse directions to move the transfer member 37 in the directions of arrows α1-α2, thereby picking up the pickup 15. The disk D is transferred to the outer side and the inner side in the radial direction, and the reproducing operation is performed. Further, as shown in FIG. 3B, the pair of erroneous insertion preventing members 11 rotatably supported on the front end side of the roller bracket 9 is in a standing state in the play state, and these erroneous insertion preventing members 11 are in the disc transport space. Since it protrudes into the left and right sides of S and faces the back side of the disc insertion slot 2a, double insertion of the disc in the play state is prevented by the erroneous insertion preventing member 11. The elastic piece 11d of the erroneous insertion preventing member 11 is separated from the lower surface of the roller bracket 9 in the play state. However, as described above, the base member 1 on which the entire mechanism such as the disk transport mechanism is mounted is framed in the play state. Since the unlocked state is elastically supported by the body 2, rattle noise due to the backlash of the erroneous insertion preventing member 11 does not occur even in the play state. Similarly, the pair of auxiliary rollers 7 rotatably supported on both side portions of the guide member 6 are separated from the roller 8 in the play state, but external vibration does not directly act on the auxiliary roller 7 in the play state. The rattle noise caused by the backlash is not generated.

  Further, when a disc that has been completely reproduced is ejected, the reverse operation is performed, and the power of the drive motor 16 is switched from the second gear train 19 to the first gear train 18. That is, when an unillustrated eject button is inserted in the play state shown in FIG. 7B, the drive motor 16 starts to rotate in the other direction, and the power of the drive motor 16 is transferred via the pinion 35 and the rack 36. It is transmitted to the member 37. As a result, the transfer member 37 moves in the direction of the arrow α2 to transfer the pickup 15 inward in the radial direction of the disk D. When the pickup 15 comes into contact with the spindle motor 14 and stops, only the transfer member 37 compresses the spring 39. Move to the end position in the direction of arrow α2. As a result, the rack 36 of the transfer member 37 moves away from the pinion 35 of the gear 34, and the drive protrusion 37a of the transfer member 37 engages with the second lock lever 27 to rotate it counterclockwise, and FIG. As shown in (A), the rotation arm 25 starts to move in the direction of the arrow B from the end position in the direction of the arrow A as the second lock lever 27 rotates. Also at this time, the planetary gear 23 is engaged with the tooth portion 28a of the relay member 28 while being moved in the direction of the arrow B, and is engaged with the gear 18a of the first gear train 18 while maintaining this state. At this time, the power of the drive motor 16 is transmitted from the planetary gear 23 of the power switching mechanism 17 to the first gear train 18 and the power transmission from the drive motor 16 to the second gear train 19 is interrupted. When the slider drive member 29 is moved in the X1 direction from the end position in the X2 direction by the first gear train 18, the first lock lever 26 is rotated counterclockwise to move the rotary arm 25 to the end in the arrow B direction. By restraining the position and moving the slider 20 from the retracted position to the advanced position, after the clamping operation of the disk D is released, the roller 8 rotates reversely and the disk is automatically conveyed from the play position to the ejection direction. .

  In the above-described embodiment, the tooth portion 28a of the relay member 28 is inclined so that the tooth tip surface thereof is an acute angle with respect to the virtual line O extending perpendicularly from the plate surface of the base member 1. FIG. As shown, the tooth portion 28a of the relay member 28 can be inclined so that the tooth height dimension increases as the distance from the plate surface of the base member 1 increases. In this case, the base member 1 corresponds to the tooth portion 28a. What is necessary is just to form the punching hole 1e to perform.

It is a top view of the vehicle-mounted disc player which concerns on the Example of this invention. FIG. 2 is a perspective view of the disc player as viewed from the back side with the frame of FIG. 1 removed. FIG. 6 is an operation explanatory diagram of a disc transport mechanism provided in the disc player. It is a reverse view of the guide member with which this disc conveyance mechanism is equipped. It is a disassembled perspective view of this disk conveyance mechanism. It is a perspective view which shows operation | movement of the erroneous insertion prevention member with which this disc conveyance mechanism is equipped. It is explanatory drawing of the power switching mechanism with which this disc player is equipped. It is a top view which shows the meshing state of the planetary gear with which this power switching mechanism is equipped, and a relay member. It is a perspective view of this planetary gear and a relay member. It is sectional drawing which shows the modification of this relay member. It is explanatory drawing of the power switching mechanism with which the conventional disc player is equipped.

Explanation of symbols

1 Base member (chassis)
DESCRIPTION OF SYMBOLS 1a Protrusion 2 Frame 3 Damper 4 Support plate 5 Guide top 5a Opening 6 Guide member 7 Auxiliary roller 8 Roller 9 Roller bracket 10 Spring 11 Misinsertion preventing member 11a Shaft 11b Cam groove 11c Escape groove 11d Elastic piece 12 Clamp arm 13 Clamper DESCRIPTION OF SYMBOLS 14 Spindle motor 15 Pickup 16 Drive motor 17 Power switching mechanism 18 1st gear train 19 2nd gear train 20 Slider 22 Sun gear 23 Planetary gear 23a Tooth tip 24 Planetary gear train 25 Rotating arm 26 1st lock lever 27 Second lock lever 28 Relay member 28a Tooth part 29 Slider drive member 30 Holding member 31 Engagement member 33 Trigger pin 34 Gear 35 Pinion 36 Rack 37 Transfer member 37a Drive protrusion 38 Guide shaft 39 Spring D Disk S Disk transport space

Claims (4)

A drive motor, a power switching mechanism having a planetary gear train operated by rotation of the drive motor, a disk transport mechanism connected to the output side of the planetary gear train via a first gear train, and the planetary gear A pickup transfer mechanism connected to the output side of the train via a second gear train, and the power of the drive motor is connected to the first gear train and the second gear train via the planetary gear train. In a disc player that is selectively transmitted to either one,
The power switching mechanism includes a relay member disposed in the middle of movement of the planetary gear of the planetary gear train, and a part of the internal gear centering on the axis of the sun gear of the planetary gear train is connected to the relay member. The disc player is characterized in that the tooth portion of the relay member is engraved and the tooth portion of the relay member is inclined so that the tooth height dimension gradually decreases along the tooth width direction.   2. The pickup transfer mechanism according to claim 1, wherein the pickup transfer mechanism has a transfer member for driving the pickup in the radial direction of the disk along the guide shaft, and the rack engraved on the transfer member and the sun gear of the planetary gear train. The second gear train is constituted by a pinion that is always meshed, and when the output of the planetary gear train is transmitted to the first gear train, the planetary gear is meshed with the first gear train. When the meshing between the pinion and the rack is released and the output of the planetary gear train is transmitted to the second gear train, the pinion is meshed with the rack and the planetary gear and the first gear are engaged. A disc player characterized by releasing the meshing of rows.   3. The disc player according to claim 1, wherein the relay member is integrally formed with a synthetic resin chassis on which the drive motor is mounted.   4. The disc player according to claim 3, wherein the tooth tip surface of the relay member is inclined at an acute angle with respect to an imaginary line extending perpendicularly from the plate surface of the chassis.

Images