JP3406102B2 - Mode switching device for disc player - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle compact disc (CD) player, a mini disc (MD) player, and the like. The present invention relates to a mode switching device that is installed or uninstalled at highly accurate timing.

[0002]

2. Description of the Related Art In a vehicle-mounted disc player, a mechanical chassis in which a disc is installed is elastically supported in a housing by an elastic body such as a damper. And
In the state before the disk is installed in the rotation drive unit on the mechanism chassis, the mechanism chassis is locked by the housing and locked. Also, when the disk is installed in the rotation drive,
The lock of the mechanism chassis is released, and the mechanism chassis is elastically supported with respect to the housing.

10 and 11 are side views showing a schematic structure of a vehicle-mounted CD player as an example of a conventional disc player of this type. In this CD player, the housing 1
A slit-shaped insertion opening 2 is opened in a nose portion provided on the front surface of the disc, and the disc D is inserted into the housing 1 through the insertion opening 2. Inside the insertion slot 2, a feed roller 4
A roller support member 3 that supports the feed roller 4 is provided, and a guide member 5 is provided above the feed roller 4. The disc D inserted from the insertion slot 2 is sandwiched between the feed roller 4 and the guide member 5, and is fed into the housing 1 by the rotational force of the feed roller 4.

A mechanism chassis 6 elastically levitated and supported by a damper or the like is provided in the housing 1, and the mechanism chassis 6 includes a spindle motor 7, a turntable 8 rotatably driven by the spindle motor 7, and It is equipped with an optical head. On the mechanism chassis 6,
A clamp arm 10 is rotatably supported via a support shaft 9, and a clamper 11 that mounts and clamps a disk D on a turntable 8 is rotatably supported at the tip of the clamp arm 10.

The casing 1 is provided with a shaft 1 for driving the clamp arm 10 in a clamping or non-clamping direction.
A rotation lever 13 is provided which rotates about 2 as a fulcrum, and the rotation lever 13 is biased counterclockwise by a spring 14. The pin 15 provided on the rotating lever 13 is provided with a cam hole 10a formed at the base of the clamper 10.
Has been inserted inside.

In the disk insertion standby state shown in FIG.
The switching member 16 is moving in the (a) direction, and is pushed by the switching member 16 to drive the rotating lever 13 in the clockwise direction. Then, the clamp arm 10 is rotated counterclockwise by the pin 15, and the clamper 11 is rotated by the rotation drive unit 8.
Away from. A lock mechanism is provided in the housing 1, and the mechanism chassis 6 is locked by the lock mechanism in the standby state of FIG.

When the disc D is inserted through the insertion slot 2,
The disc sandwiched by the feed roller 4 and the guide member 5 is fed inward of the housing 1, but when the disc D is conveyed to a predetermined position on the mechanism chassis 6 and detected, the switching member 16 is driven by the motor. It can be moved in the (b) direction.
When the switching member 16 moves in the (B) direction, the switching member 16 first separates from the rotating lever 13, the rotating lever 13 rotates counterclockwise by the urging force of the spring 14, and the clamp arm 10 rotates clockwise. By rotating, as shown in FIG. 11, the central portion of the disk D is set on the rotary drive unit 8 by the clamper 11 and clamped. Subsequent switching member 1
By the moving force of 6 in the (b) direction, the lock mechanism is released, the mechanism chassis 6 is unlocked, and the mechanism chassis 6 is elastically levitated and supported in the housing 1 by a damper or the like. Become.

When a disk is installed in the rotary drive unit 8 and is rotationally driven to perform a reproducing operation or the like, the mechanism chassis 6 is elastically levitated in the housing 1, so that external vibration causes an operation such as reproducing. Will not be adversely affected.

[0009]

In this type of disc player, as described above, when the disc D is inserted, the disc D is first installed and clamped by the clamper 11, and then the mechanical chassis 6 is mounted. The lock is released. On the contrary, in the ejecting operation of the disc D, the mechanism chassis 6 is locked in the housing 1, and thereafter the clamp by the clamper 11 is released, and the disc D is ejected from the insertion port 2 by the rotational force of the feed roller 4.

As described above, the clamp operation or the clamp release operation of the disk by the clamper 11 and the lock and unlock operation of the mechanism chassis 6 by the lock mechanism are performed at different timings. The operation relating to this clamp and the mechanism chassis 6 are performed. The operation related to locking is
It is done by a separate mechanism. That is, the operation related to the clamp is performed by the rotation lever 13, and the locking operation of the mechanism chassis 6 is performed by the lock mechanism separate from the rotation lever 13.

As described above, if the mechanisms for both operations are provided separately, the mechanism inside the housing becomes complicated, and the space occupied by the mechanisms for both operations becomes large, and the device is miniaturized. Will be hindered. Further, due to increase in backlash due to wear of mechanism components performing the respective operations, there is a possibility that the mutual timings of the lock and unlock operations of the mechanism chassis and the clamp and unclamp operations of the clamp arm 10 may be misaligned. is there.

Further, in the conventional example shown in FIG. 10, the rotating lever 13 is driven by the pushing force of the mechanism chassis 16 in the direction (a).
Is rotated, the turning force of the rotating lever 13 is transmitted from the pin 15 to the cam hole 10a, and the clamp arm 10 is driven in the clamp releasing direction. As described above, since the clamp arm 10 is operated by intervening the turning force of the rotating lever 13, the efficiency of transmitting the force for operating the clamp arm 10 is poor, and the cam hole 10a is supported by the base of the clamp arm 10. Since it is provided close to the shaft 9, when the clamp arm 10 is rotated with a predetermined moment, the load acting on the pin 15 is large, and the driving load of the switching member 16 is also large. . Therefore, the output of the motor for operating the switching member 16 in the (a) direction must be increased.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art by consolidating a mechanism serving as a drive unit for installing and releasing a disk on a rotary drive unit and for locking and unlocking a mechanism chassis. The present invention provides a mode switching device for a disc player in which the device chassis can be downsized, the mechanism chassis can be locked and unlocked, and the timings of disc installation and release can be set with high precision. I am trying.

Another object of the present invention is to enable a clamping operation and a unclamping operation for installing a disk on a rotary drive unit to be performed with a low load.

[0015]

Mode switching device of the disc player according to the present invention SUMMARY OF THE INVENTION comprises a mechanism chassis, which is resiliently supported in the housing, a rotary drive unit provided on the mechanism chassis, said rotary drive unit Clamp mechanism that installs the disc, control cam that is rotated by a motor , and movement
Lock member for locking the mechanism chassis by operation
Has the door, lock the control cam includes a locking portion which abuts on the clamping drive to operate the more the clamping mechanism in rotation, and the mechanism chassis, the locking member
A driving unit for moving the click direction is provided, said system
When the control cam rotates to a specified angle, the clamp
The clamp mechanism is released by the drive unit.
While being set, the lock portion and the lock member
The mechanical chassis is locked to the housing by both
It is characterized by being done.

In the above description, when the control cam rotates in the predetermined direction, the clamp drive section first operates the clamp mechanism to set the disk, and then the lock section unlocks the mechanism chassis. The clamp drive section and the lock section are provided in different rotation phases.

[0017]

Further, the clamp mechanism has a clamper for pressing the disk against the rotary drive unit and a clamp arm for supporting the clamper and biased in the disk pressing direction, and the control cam is rotated by a predetermined angle. At this time, it is preferable that the clamp drive unit lifts the clamp arm in the disc pressing release direction.

[0019]

In the above means, the control cam is rotationally driven by the power of the motor. The control cam is provided with a switching member that transmits the power of the motor via a gear or the like, or is reciprocally driven by the power of the motor, and the moving force of the switching member causes the control cam to rotate. When the disc is introduced, the control cam rotates, the clamp mechanism provided in the control cam operates the clamp mechanism to place the disc in the rotary drive unit, and the lock unit provided in the control cam The lock of the mechanism chassis is directly released, and the mechanism chassis is elastically levitated and supported in the housing. When the disc is ejected, the control cam rotates in the opposite direction, the mechanism chassis is first directly locked and restrained by the lock portion, and then the clamp mechanism is operated by the clamp drive portion to release the clamp of the disc.

The above timing is determined by the arrangement phase of the clamp drive section and the lock section on the control cam. With this arrangement phase, when the disc is inserted, the clamp mechanism is first operated by the clamp drive unit to set the disc on the rotary drive unit, and then the lock of the mechanism chassis is unlocked by the movement of the lock unit. When the disc is ejected, the mechanism chassis is locked by the lock part first, and then the clamp mechanism is operated by the clamp drive part to release the clamp of the disc. Therefore, the disc clamping and unclamping operations are always performed with the mechanism chassis locked, and the clamping and unclamping operations are reliably performed.

Further, if the control cam is provided with a drive unit and the lock member is operated by this drive unit, and both the lock unit provided on the control cam and the lock member perform the locking and unlocking operations of the mechanism chassis, The mechanism chassis can be locked securely at multiple points.

In the case of a CD player or the like, the above-mentioned clamp mechanism is composed of a clamper and a clamp arm that supports this clamper, and the disc is held and clamped by the clamper and the rotation drive section (turntable).
The clamp mechanism in the case of an MD player or the like serves as a mechanism for allowing the rotation drive unit (clamp table) to enter the cartridge, and the central portion of the disc is magnetically attracted and clamped by the clamp arm.

When the clamp mechanism is composed of the clamper and the clamp arm, the clamp arm is structured so as to be biased in the disc pressing direction, and the clamp arm is directly lifted by the clamp drive portion provided in the control cam. With the structure for performing the installation / removal, the load for lifting the clamp arm is reduced, and the installation / deinstallation operation of the disk is performed under a low load.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. The following embodiment shows an on-vehicle CD player. FIG. 1 is an exploded perspective view of the CD player, FIG. 2 is a side view in the direction of arrow II in FIG. 1, and FIG. III arrow plan view of FIG. 4, FIG. 4 is a side view showing the structure of the power transmission mechanism and the intermittent mechanism, FIG. 5 (A) (B) (C)
(D) is a side view showing the operation of the power transmission mechanism and the intermittent mechanism,
6 and 7 are side views showing a clamping operation and an unclamping operation of the clamp mechanism, and FIGS. 8 and 9 are side views showing a locking operation and an unlocking operation of the mechanism chassis.

Reference numeral 20 shown in FIG. 1 is a housing. The case 20 is formed by bending a sheet metal, and is shown in FIG.
The bottom plate 21 and the side plate 22 of the housing 20 are shown in FIG.
A nose portion made of a synthetic resin material is fixed to the right side of the casing 20 in the figure, and the disc D is attached to this nose portion.
The insertion port (introduction part) 23 of is opened in a slit shape (see FIG. 6).

A mechanism chassis 24 is provided inside the housing 20. The mechanism chassis 24 is formed by bending a sheet metal material, and a plurality of places of the mechanism chassis 24 are supported on the bottom plate 21 by dampers 25. The damper 25 is a flexible bag in which silicone oil or the like is enclosed. When the mechanism chassis 24 is not locked, the damper 25 causes the mechanism chassis 24 to move on the bottom plate 21 of the housing 20. It is supported in an elastically levitated state.

A rotary drive unit (turntable) 26 is rotatably supported on the upper surface of the mechanism chassis 24.
At the bottom of the mechanism chassis 24, a spindle motor 27 that rotationally drives the rotary drive unit 26 is mounted. The mechanism chassis 24 is equipped with an optical head and a mechanism for moving the optical head.

On the side of the mechanism chassis 24, bent side pieces 24b and 24c are provided. One side piece 2
4b includes a lock pressure piece 2 protruding vertically to the side.
4d is formed by bending. Also, the side pieces 24b and 24c
Lock grooves 24e and 24f cut in the direction (a) are formed on both sides.

A support piece 24a is formed by bending on both sides of the rear end of the mechanism chassis 24, and a support shaft 28 is provided on the support piece 24a. A clamp arm 31 is provided on the mechanism chassis 24, and support holes 31 b are formed in bent pieces 31 a on both left and right sides of the clamp arm 31. The support hole 31b is supported by the support shaft 28, and the clamp arm 31 is rotatable with respect to the mechanism chassis 24. A clamper 32 is rotatably supported on the tip of the clamp arm 31. The clamp arm 31 is urged clockwise by a spring 33 in FIG.
It is urged in the direction of pressing against 6. In this example,
The clamp arm 31 and the clamper 32 constitute a clamp mechanism 30 for installing the disk D on the rotation drive unit 26.

As shown in FIG. 6, inside the insertion opening 23 of the housing 20, a guide member 34 and a feed roller 35 that constitute a transport mechanism are provided. The guide member 34 is formed of a material having a small friction coefficient such as a synthetic resin, and the guide member 34 is provided on the side plate 22 of the housing 20.
It has been fixed to. The feed roller 35 is formed of a material having a large friction coefficient such as synthetic rubber, and the feed roller 35 is fixed to the roller shaft 36.

The roller support member 37 is formed by bending a sheet metal material, and has support pieces 37a on both sides thereof.
Is bent and formed. The roller shaft 36 is rotatably supported by the support piece 37a. A roller gear 38 is fixed to one end of the roller shaft 36 shown in FIG. A support hole 3 is provided at the upper end of the arm of the support piece 37a.
7b is bored, the support hole 37b is inserted into the support shaft 22a provided on the side plate 22 of the housing 20, and the roller support member 37 is rotatably supported with respect to the support shaft 22a. As shown in FIG. 6, the roller support member 37 is urged by a spring 39, and the urging force presses the feed roller 35 against the guide member 34.

A switching member 40 is provided on the bottom plate 21 of the housing 20 and inside the side plate 22. This switching member 4
0 is slidably supported in the (a)-(b) directions by a guide mechanism provided on the bottom plate 21 or the side plate 22 of the housing 20. As shown in FIG. 6, while waiting for the introduction of the disc D, the switching member 40 is moving in the (a) direction, and as shown in FIG.
When installed on the rotary drive unit 26 of No. 4, the switching member 40 is moving in the (B) direction.

By the reciprocating movement of the switching member 40,
The clamp mechanism 30 is controlled, the position of the roller support member 37 is controlled, and the mechanism chassis 24 is locked and unlocked. The clamp mechanism 30
And lock control of the mechanism chassis 24,
A control cam 50 is used. The control cam 50 rotates about the center hole 51 as a fulcrum. A bracket is cut and raised at the bottom of the housing 20, and a support shaft is provided in the bracket. The center hole 51 is rotatably supported by the support shaft. The position of the central hole 51, which is the center of rotation of the control cam 50, is shown in FIGS.

Pins 52a and 52b are integrally formed on the control cam 50 so as to project therefrom. The pins 52a and 52b are arranged on an arc locus centered on the central hole 51.
On the other hand, a pair of drive grooves 41a and 41b are formed in a concave shape in a portion of the switching member 40 facing inward of the housing 20.
As shown in FIG. 6, when the switching member 40 is moving in the (a) direction, the pin 52a is fitted in the drive groove 41a, and the control cam 50 is in a state of being rotated clockwise. When the switching member 40 moves in the (B) direction from the position of FIG. 6, the control cam 50 is rotated counterclockwise by the moving force acting on the pin 52a from the drive groove 41a. When the switching member 40 moves for a predetermined distance, the pin 52a comes out of the drive groove 41a, and at the same time, the pin 52b fits into the drive groove 41b. This time, the pin 52a moves from the drive groove 41b to the pin 52b.
The control cam 50 continues to rotate in the counterclockwise direction due to the moving force acting on. As shown in FIG. 7, the switching member 40 is
The control cam 50 rotates counterclockwise by an angle of approximately 150 to 160 degrees until it moves to the final position in the direction.

The control cam 50 is provided with a clamp drive section 53. The clamp driving unit 53 is used for the control cam 5
It is formed by protruding in a cam shape in the radial direction of 0. Clamp arm 3 constituting the clamp mechanism 30
A contact piece 31c is provided at the tip of the first bent piece 31a, and the contact piece 31c is pressed against the clamp drive portion 53 of the control cam 50 by the force of the spring 33. Therefore, as shown in FIG. 6, when the control cam 50 is rotated most clockwise, the abutment piece 31c is pushed up by the clamp driving portion 53, and the clamp arm 31 is pushed up.
Is rotated counterclockwise, the clamper 32 is separated from the rotation drive unit 26, and the disc D is in the unclamped state. When the control cam 50 slightly rotates counterclockwise from the state of FIG. 6, the clamp drive portion 53 is disengaged from the contact piece 31c, and the clamp arm 31 is rotated clockwise by the urging force of the spring 33, so that the clamper The disk D is mounted on the rotary drive unit 26 by 32.

A lock member 60 is provided on the bottom plate 21 of the housing 20 at a position apart from the side plate 22. The lock member 60 is slidably supported on the bottom plate 21 in the (a)-(b) directions. A fitting groove 61 is formed on the bottom of the lock member 60, and an arcuate surface 62 continuous with the fitting groove 61 is formed on the surface of the lock member 60 facing the side plate 22. As shown in FIG. 8, when the lock member 60 moves most in the (a) direction, the circular arc surface 62 is
Center hole 51 of control cam 50 (center of rotation of control cam 50)
With respect to the arc locus surface with a constant radius. Further, the stopper groove 6 is provided at a position where the locking member 60 is lined up with the fitting groove 61.
3 is formed.

Further, the mechanism chassis 24 of the lock member 60
The pair of wedge-shaped lock protrusions 64a and 6
4b is formed. On the surface of the control cam 50 facing the lock member 60, a drive protrusion 54 that serves as a drive portion for driving the lock member 60 and a stopper protrusion 55 are integrally formed. A lock portion 56 is formed on the outer periphery of the control cam 50. The lock portion 56 is an arcuate cam surface having a constant radius from the central hole 51.

As shown in FIG. 8, when the control cam 50 is rotated most clockwise, the drive projection 54 provided on the control cam 50 is separated from the fitting groove 61 formed on the lock member 60. Abutting the circular arc surface 62, and the stopper projection 55 is fitted in the stopper groove 63 of the lock member 60. Then, the lock member 60 is in the position driven in the (a) direction, the lock protrusions 64a and 64b are fitted into the lock grooves 24e and 24f of the mechanism chassis 24, and the lock portion 56 provided on the control cam 50 is fixed. The lock pressing piece 24d of the mechanism chassis 24 is pressed to move the mechanism chassis 2
4 is locked in the housing 20.

That is, the lock portion 56 provided on the control cam 50 presses the lock pressing piece 24d, and the lock portion 56
Thus, the mechanism chassis 24 is directly locked. That is, the drive projection 54 provided on the control cam 50 is pressed against the circular arc surface 62 of the lock member 60, and the lock portion 56 provided on the control cam 50 presses the lock pressing piece 24d. 24 is locked in the housing 20 without moving. Further, in this embodiment, since the mechanism chassis 24 is locked by using the lock member 60, the mechanism chassis 24 is locked by the lock pressing piece 2.
4d and the lock grooves 24e and 24f are locked at a plurality of positions, so that the mechanism chassis 24 is securely locked.

When the control cam 50 rotates counterclockwise from the state shown in FIG.
It deviates from 3. Next, the drive protrusion 54 slides on the circular arc surface 62, but at this time, the lock member 60 does not move. Control cam 5
When 0 rotates counterclockwise and the lock portion 56 is disengaged from the lock pressing piece 24d, the drive projection 54 fits into the fitting groove 61, and the control cam 50 moves counterclockwise thereafter. Is transmitted from the drive protrusion 54 to the fitting groove 61,
The lock member 60 moves in the (B) direction. Then, the lock protrusions 64a and 64b are separated from the lock grooves 24e and 24f, and the lock of the mechanism chassis 24 is released. In addition,
The lock member 60 may be biased in the direction (a) by a spring in FIGS. 8 and 9 so that the rotational force of the drive protrusion 54 is reliably transmitted to the fitting groove 61.

A roller control groove 42 is formed at the right end of the switching member 40 in the figure, and a restraint shaft 43 fixed to the inside of the support piece 37a of the roller support member 37 can be fitted into the roller control groove 42. It is like this. As shown in FIG. 6, when the switching member 40 is moving in the (a) direction,
The restraint shaft 43 is released from the restraint from the roller control groove 42, and the feed roller 35 is guided by the force of the spring 39.
4, the disc D is sandwiched by the feed roller 35 and the guide member 34, and the feed force can be applied to the disc D. As shown in FIG. 7, when the switching member 40 moves in the (B) direction, the restraint shaft 43 causes the roller control groove 4 to move.
2, the roller support member 37 is rotated counterclockwise, and the feed roller 35 is retracted to a position away from the guide member 34.

Next, the switching member 40 is set to (a)-(b).
The structures of the driving gear 71, the power transmission mechanism 80, and the interrupting mechanism 90 that drive and control in the direction will be described. Side plate 2 of housing 20
A large-diameter gear 70 is provided on the inner side of 2. The central hole 70a of the large-diameter gear 70 is rotatably supported by a gear shaft 22b fixed inside the side plate 22. Further, the large-diameter gear 70 is integrally provided with a drive gear 71 having a small pitch diameter.

As shown in FIG. 2, a motor 72 is fixed on the bottom plate 21 of the housing 20. A worm gear 73 is fixed to the output shaft of the motor 72. The rotational force of the worm gear 73 is transmitted to the gear fixed to the transmission shaft 74, and the transmission shaft 74 is rotationally driven. Transmission shaft 74
A pinion gear 75 is fixed to the pinion gear 7
5 is meshed with the large-diameter gear 70, and the large-diameter gear 70 and the drive gear 71 are decelerated by the power of the motor 72 to be driven in both forward and reverse directions. Further, the roller gear 38 fixed to the roller shaft 36 meshes with the large diameter gear 70 at least in the state shown in FIG. In the state of FIG. 6, the power of the motor 72 is transmitted to the roller gear 38 via the large diameter gear 70, and the feed roller 35 is driven in both forward and reverse directions.

A power transmission mechanism 80 is combined with the large diameter gear 70. The power transmission mechanism 80 includes a transmission member (transmission lever) 81 and a planetary gear 82. The power transmission member 81 is formed of a thin plate material, and the fulcrum hole 81a is swingably supported by the gear shaft 22b. That is, the transmission member 81 is provided so as to swing coaxially with the large diameter gear 70 and the drive gear 71. A pressure piece 81b is integrally formed at one end of the transmission member 81, and the pressure piece 81b is elastically pressed against the surface of the large diameter gear 70, whereby the transmission member 81, the large diameter gear 70, and the drive gear 71. Rotational frictional forces act on each other. Alternatively, the transmission member 81 is formed of a plate material having rigidity, and the large diameter gear 70 is elastically pressed from the inside of the device toward the transmission member 81 by a leaf spring or the like, and the elastic force of the leaf spring or the like causes the large diameter gear 70 and the drive member to drive. The structure may be such that a rotational frictional force acts on the gear 71.

The planetary gear 82 is rotatably supported by the transmission member 81 by a shaft 83. In addition, the planetary gear 82
Always meshes with the drive gear 71. The transmission member 81 has a pair of bent stopper pieces 81c, 81c.
Is provided, and the stopper pieces 81c, 81c are
It is inserted into the stopper hole 22c formed in the side plate 22 of No. 0. The stopper pieces 81c and 81c are attached to the stopper hole 2
The swing range of the transmission member 81 is regulated within the range of hitting both ends of 2c.

On the other hand, a rack 45 is formed on the switching member 40, and in the operating range shown in FIGS. 5A to 5C, the planet gear 82 meshes with the rack 45 and the drive gear 71 moves. Rotational power is transmitted to the switching member 40 via the planetary gear 82. The connection and disconnection of power between the planetary gear 82 and the rack 45 is performed by the connection and disconnection member 9 that constitutes the connection and disconnection mechanism 90.
Controlled by 1. The support hole 91a formed at the lower end of the interrupting member 91 is inserted into the support shaft 22d fixed to the side plate 22 of the housing 20, and the interrupting member 91 is rotatably (swingably) supported by the support shaft 22d. Has been done.

The interrupting member 91 has a guide groove 9 as a guide portion.
2 is formed, and the guide pin 84 fixed to the transmission member 81 is inserted into the guide groove 92. Figure 4
As shown in FIG. 6, the guide groove 92 is formed by continuously forming a lock portion 92a, a swing guide portion 92b, and a holding guide portion 92c, and a release guide whose groove is opened from the holding guide portion 92c. It is a portion 92d.

The attitude of the connecting / disconnecting member 91 is determined by the detection lever 9
3 and the switching member 40. Support shafts 93a, 93a are integrally formed at the upper and lower ends of the base of the detection lever 93. The support shafts 93a, 93a are connected to the housing 20.
The detection lever 93 is supported by the bottom plate 21 and a bracket (not shown) provided on the bottom plate 21 with a predetermined distance therebetween, and is rotatably supported in the horizontal direction. A detection portion 93b is integrally formed at the tip of the detection lever 93. As shown in FIG. 3, the detection lever 93 extends into the disc loading path between the mechanism chassis 24 and the clamp arm 31, and when the disc D is transported to a position just before the final position, D is a detection unit 93b
It is supposed to hit.

A connecting pin 93c is provided at the base of the detection lever 93.
Are integrally formed, and the connecting pin 93c is inserted into the elongated hole 91b formed in the interrupting member 91. By this connection, when the detection lever 93 rotates in the (c) direction (see FIG. 3), the interrupting member 91 is rotated in the (two) direction (see FIG. 2). Further, as shown in FIG. 3, the detection lever 93 is always biased in the (e) direction by the spring 94, and as a result, the interrupting member 91 is also biased in the (e) direction.

A control pin 95 is integrally provided on the connecting / disconnecting member 91, and the control pin 95 is inserted into a control groove 44 formed in the left end portion of the switching member 40 in the drawing.
As shown in FIG. 4, the control groove 44 includes a free portion 44a extending substantially vertically, a restraining portion 44b extending substantially horizontally, and a releasing portion 44c extending substantially horizontally above the restraining portion 44b in the drawing. It is formed continuously.

Next, a series of operations of the vehicle-mounted CD player will be described. FIG. 4, FIG. 6 and FIG. 8 show the standby state waiting for the insertion of the disc D. In this standby state, the switching member 40 is moving in the (a) direction, and the pin 52a of the control cam 50 is fitted into the drive groove 41a formed in the switching member 40 as shown in FIG. The control cam 50 is rotating clockwise. Therefore, the clamp driving portion 53 of the control cam 50 lifts the contact piece 31c, the clamp arm 31 rotates counterclockwise, and the clamper 32 is separated from the rotation driving portion 26.

Further, since the control cam 50 is rotated clockwise, as shown in FIG.
Is located on the arc surface 62 of the lock member 60, and the lock member 6
0 is moved in the (a) direction. Therefore, the lock protrusions 64 a and 64 b provided on the lock member 60 are fitted into the lock grooves 24 e and 24 f of the mechanism chassis 24. Further, the lock portion 56 formed on the control cam 50 is pressed against the lock pressing piece 24 d of the mechanism chassis 24, and the mechanism chassis 24 is locked to the housing 20.

Since the lock portion 56 is pressed by the lock pressing piece 24d and the drive projection 54 contacts the circular arc surface 62, the control cam 50, the lock member 60, and the mechanism chassis 24 are all locked without movement. It is in a state. Further, since the control cam 50 is in the locked state of rotating clockwise, the switching member 40 is also held in the state of moving in the (a) direction. When the switching member 40 is moving in the (a) direction, as shown in FIG. 6, the restraint shaft 43 provided on the roller support member 37 is pulled out from the roller control groove 42, and the feed roller 35 is moved by the spring 39. It is pressed against the guide member 34 by the urging force.

Further, as shown by the solid line in FIG. 3, the detection lever 93 is rotated in the (e) direction by the urging force of the spring 94 and is in the (i) position, so that the interrupting member 91 is (e). Is rotating in the direction. At this time, as shown in FIG. 4, the control pin 95 provided on the interrupting member 91 is located in the free portion 44 a of the control groove 44 of the switching member 40. Further, the guide pin 84 provided on the transmission member 81 is located in the lock portion 92 a of the guide groove 92 formed in the interrupting member 91. Therefore, the transmission member 81 swings counterclockwise, and the planetary gear 82 is separated from the rack 45.

FIG. 4 shows the power transmission mechanism 80 in which the power from the drive gear 71 to the rack 45, that is, the switching member 40 is cut off. In the standby state described above, the insertion slot 2
When the disc D is inserted from 3, and the insertion is detected by a detection mechanism (not shown), the motor 72 shown in FIG. 2 is started, and the large diameter gear 70 and the drive gear 71 are rotationally driven in the clockwise direction. As shown in FIG. 6, the rotational force of the large-diameter gear 70 is transmitted to the roller gear 38, and the feed roller 35 is driven counterclockwise. The tip of the disc D is the guide member 3
4 and the feed roller 35, the disk D is conveyed toward the upper surface of the mechanism chassis 24 by the rotational force of the feed roller 35. However, as shown in FIG. 4, in the power transmission mechanism 80, since the rotational force of the drive gear 71 is not transmitted to the rack 45, the switching member 40 does not move at this point.

When the disk D carried by the carrying mechanism moves to almost the end of the carrying path, the detecting portion 93b of the detecting lever 93 located at the position shown in FIG. 3 (i).
The outer peripheral portion of the disk D hits against and the detection lever 93 is pushed. The detection lever 93 is rotated in the (c) direction by the pushing force of the disk D, and the interrupting member 91 connected to the detection lever 93 is rotated in the (two) direction with the support shaft 22d as a fulcrum. That is, in the state shown in FIG. 4, since the control pin 95 provided on the interrupting member 91 is located in the free portion 44a of the control groove 44 of the switching member 40, the interrupting member 91 rotates in the (two) direction. It is possible to move.

When the interrupting member 91 rotates in the (two) direction,
As shown in FIG. 5A, the guide pin 84 provided on the transmission member 81 causes the lock portion 9 of the guide groove 92 of the interrupting member 91 to move.
2a is disengaged and the guide pin 84 reaches the inside of the swing guide portion 92b. When the guide pin 84 reaches the inside of the swing guide portion 92b, the transmission member 81 can swing. At this time, since the large diameter gear 70 and the driving gear 71 are continuously driven in the clockwise direction, the transmission member 81 is rotated clockwise by the frictional force between the large diameter gear 70 and the transmission member 81. Then, as shown in FIG. 5A, the planetary gear 82 meshes with the rack 45. When the planetary gear 82 meshes with the rack 45, in the power transmission mechanism 80, the rotational force of the drive gear 71 is changed to the planetary gear 82.
Is transmitted to the rack 45 via the
Driven in the direction.

Immediately after the switching member 40 is driven in the (B) direction, as shown in FIG. 5B, the control pin 95 provided on the interrupting member 91 causes the restraint portion of the control groove 44 of the switching member 40 to be restrained. Enter 44b. Therefore, after that, the switching member 40 is
While moving from the position of (B) to the position of (C) in the figure, the attitude of the interrupting member 91 remains fixed. Intermittent member 91
During this period when is fixed, the guide pin 84 provided on the transmission member 81 is located in the holding guide portion 92c of the guide groove 92 of the interrupting member 91. Therefore, the guide pin 84 remains held by the holding guide portion 92c, the transmission member 81 cannot swing, and the planetary gear 82 is held while meshed with the rack 45.

Therefore, in the section shown in FIGS. 5B to 5C, even if the large diameter gear 70 and the drive gear 71 rotate counterclockwise, the transmission member 81 swings counterclockwise. Therefore, the rotational force of the drive gear 71 in both forward and reverse directions is always transmitted to the rack 45. Therefore, when the disc D is ejected by a series of operations in the opposite direction to the above, the rotational force of the drive gear 71 in the counterclockwise direction is transmitted to the switching member 40 via the planetary gear 82, and the switching member 40 (i. ) Will be driven in the direction. When the disk D is being sent, for example, a load is applied to the disk D and it is necessary to send the disk D back toward the insertion port 23 and then send the disk D back onto the mechanism chassis 24. The rotational force in both the forward and reverse directions is always transmitted to the switching member 40, and the switching member 40 follows the feeding direction of the disk D and moves in the (a)-(b) direction.

Returning to the explanation, the switching member 40 is set to (b).
While moving in the direction and moving from the position shown in FIG. 5 (B) to the position shown in FIG. 5 (C), first, the restraint provided on the roller support member 37 by the roller control groove 42 formed in the switching member 40. The shaft 43 is restrained, the roller support member 37 rotates counterclockwise as shown in FIG.
The feed roller 35 is separated from the disc D fed to the final end position on the No. 4, and the feeding force from the transport mechanism to the disc D is cut off.

When the switching member 40 moves in the (B) direction, as shown in FIGS. 6 to 7, the pins 52a and 52b of the control cam 50 are driven by the drive grooves 41a and 41b of the switching member 40.
And the control cam 50 is rotated counterclockwise. At the initial stage of this rotating operation, the clamp driving portion 53 formed on the control cam 50 separates from the contact piece 31c, and the elastic force of the spring 33 immediately rotates the clamp arm 31 in the clockwise direction, so that the center of the disc D is rotated. The part is pressed against the rotary drive part 26 by the clamper 32, and the disk D is clamped. The clamping operation of the disk D and the retracting operation of lowering the feed roller 35 are set at substantially the same time, or the lowering and retracting operation of the feed roller 35 is set slightly earlier.

As shown in FIG. 8, in the initial state of the control cam 50 starting to rotate counterclockwise, the drive projection 54 provided on the control cam 50 causes the arcuate surface 62 of the lock member 60 to move.
Since it moves along the lock member 60, no moving force acts on the lock member 60. That is, the lock member 60 does not move while the above-described clamping operation of the disk D is being performed. Then, when the disc clamping operation is completed and the drive projection 54 has finished moving within the arcuate surface 62 and is fitted into the fitting groove 61, a moving force in the (b) direction acts on the lock member 60,
Almost at the same time, the lock portion 56 formed on the control cam 50 is disengaged from the lock pressing piece 24d of the mechanism chassis 24.

Further, the counterclockwise turning force of the drive projection 54 acts on the lock member 60 via the fitting groove 61, and the lock member 60 is driven in the (B) direction. Therefore, the lock protrusions 64a and 64b formed on the lock member 60 are disengaged from the lock grooves 24e and 24f of the mechanism chassis 24. Therefore, the mechanism chassis 24 is elastically levitated and supported by the damper 25. Since the mechanism chassis 24 is elastically levitated and supported, the vibration of the vehicle body does not adversely affect the disc reproducing operation while the disc D is driven by the disc driving member.

When the switching member 40 reaches the end in the (b) direction, as shown in FIG. 5D, the control pin 95 of the interrupting member 91 causes the release portion 44c of the control groove 44 of the switching member 40.
Moving inward, the interrupting member 91 is further rotated in the (two) direction from the state of FIG. 5 (C). Therefore, the transmission member 81
The guide pin 84 provided on the guide groove 9 of the interrupting member 91.
The second holding guide portion 92c exits and moves to the release guide portion 92d. In the release guide portion 92d, the clockwise rotation restriction of the transmission member 81 is released. At this time, since the large diameter gear 70 and the drive gear 71 are rotated clockwise, the frictional transmission member 81 is rotated clockwise, the planetary gear 82 is separated from the rack 45, and the switching member is moved. Transmission of the moving force in the (b) direction to 40 is cut off.

When the connecting / disconnecting member 91 is rotated to the position shown in FIG. 5 (D), the detection lever 93 is moved to (ii) in FIG.
The detection unit 93b is largely separated from the disk D which is rotated to the position indicated by and is rotationally driven by the rotational drive unit 26. That is, in the state of FIG. 5D, all the operations for loading the disc are completed, and the transmission of power to the switching member 40 is cut off.
Moreover, the detection lever 93 is separated from the disc D.

When the state of FIG. 5D is reached, the planetary gear 82 is separated from the rack 45 and the drive gear 71 is removed.
Is not transmitted to any place, and the clockwise swing of the transmission member 81 is restricted by the stopper hole 22c formed in the side plate 22. Therefore, the accuracy of the stop timing of the motor 72 is not required. For example, after detecting that the switching member 40 is located at the end in the (b) direction, or after detecting that the feed roller 35 has descended to the retracted position. The predetermined time may be measured and the motor 72 may be stopped. In addition, the motor 72
Is not runaway, power is not transmitted to the switching member 40,
There is no inconvenience such as mechanism locking or excessive current flowing to the motor.

The discharging operation of the disk D is the reverse of the above, and when the motor 72 is started and the large diameter gear 70 and the drive gear 71 are rotated counterclockwise in the state of FIG. The member 81 swings counterclockwise, the planetary gear 82 meshes with the rack 45, and the switching member 40 is driven in the (a) direction. In the process from FIG. 5 (C) to FIG. 5 (B), the mechanism chassis 24 is locked first, then the clamp of the disk D is released, and the feed roller 35 is raised to the position shown in FIG. Then, the power is transmitted from the large diameter gear 70 to the roller gear 38, the feed roller 35 is driven in the clockwise direction, and the disc D is ejected from the insertion port 23. Further, when the switching member 40 moves to the position shown in FIG. 4, the planetary gear 82 separates from the rack 45, and the transmission of power to the switching member 40 is cut off.

In the above embodiment, the interrupting member 91 rotates about the support shaft 22d as a fulcrum, but the interrupting member 91 moves horizontally in synchronization with the rotation of the detection lever 93. May be. Further, in the power transmission mechanism 80, a plurality of gears may be provided from the drive gear 71 to the rack, and any one of these gears may be moved by the transmission member 81.

[0069]

As described above, according to the present invention, the control cam which is rotated is provided, and the clamp mechanism is operated by the clamp drive portion provided in the control cam, and the control cam is also provided in the control cam. The mechanism chassis is locked by the lock part. That is, both the clamp and lock operations are performed by the rotation of the control cam, so that the mechanism is integrated. Further, since both of the above operations are performed by the rotation operation of the control cam, it is only necessary to provide the rotation operation area of the control cam.
The device can be downsized.

When the lock member is operated by the control cam and both the lock portion and the lock member lock and unlock the mechanical chassis, the mechanical chassis is locked securely.

If the clamper of the clamp mechanism is urged in the disc pressing direction and the clamp drive unit provided on the control cam lifts the clamper to release the clamp, the load for operating the clamp mechanism is increased. Get smaller.

[Brief description of drawings]

FIG. 1 is an exploded perspective view partially showing a structure of a vehicle-mounted CD player as one embodiment of the present invention,

2 is a partial side view in the direction of arrow II shown in FIG. 1,

FIG. 3 is a partial plan view showing a relationship between a detection lever and a disc, which is viewed in the direction of arrow III in FIG. 1;

FIG. 4 is a side view showing the structures of a drive gear, a power transmission mechanism, and an interrupting mechanism,

5 (A), (B), (C), and (D) are side views similar to FIG. 4, which sequentially show the power transmission operation to the switching member when the disc is inserted and fed.

FIG. 6 is a side view showing an unclamped state of the disc,

FIG. 7 is a side view showing a state where the disc is clamped,

FIG. 8 is a side view showing a state in which the mechanism chassis is locked,

FIG. 9 is a side view showing a state where the mechanism chassis is unlocked,

FIG. 10 is a side view showing a state where the disc clamp is released in the conventional vehicle-mounted CD player;

11 is a side view showing a state where the disc is clamped in the conventional example of FIG.

[Explanation of symbols]

20 housing 21 Bottom plate 22 Side plate 24 mechanical chassis, 24d lock pressure piece 24e, 24f Lock groove 25 damper 26 Rotation drive 31 Clamp arm 32 clamper 33 Spring for urging clamp arm 35 feed roller 37 Roller support member 38 roller gears 40 Switching member 45 racks 50 control cam 53 Clamp drive 54 Drive Protrusion (Drive Unit) 56 Lock part 60 Lock member 61 Mating groove 62 arc surface 64a, 64b Lock protrusion 70 Large diameter gear 71 drive gear 72 motor 80 Power transmission mechanism 81 Transmission member 82 planetary gears 84 Guide pin 90 Intermittent mechanism 91 Intermittent member 93 Detection lever D disk

Claims (4)

(57) [Claims] And 1. A mechanism chassis is elastically supported to the housing, a rotary drive unit provided on the mechanism chassis, a clamp mechanism for installing the disk on the <br/> rotary drive unit, rotated by a motor Driven by control cam and movement
And a locking member for locking the mechanism chassis, said control cam, clamping drive for operating the more the clamping mechanism in its rotation, and the mechanism chassis
Move the abutting lock part and the lock member in the lock direction.
A drive unit for moving are provided, when the control cam is rotated to a predetermined angle, the click
The clamp mechanism releases the clamp by the lamp driver.
The lock part and the lock
Both the member and the mechanism chassis
A mode switching device for a disc player, which is locked . 2. The control cam rotates to the predetermined angle.
When the lock is locked by the drive of the control cam
The member is moved in the first direction, and the locking portion
Mechanism chassis in a second direction opposite to the first direction
When pushed, the control cam, the lock member, and the mechanical system
2. The mode switching device for a disc player according to claim 1, wherein the chassis and the chassis are all locked so that they do not move . When wherein said control cam is rotated in a predetermined direction, and allowed to clamping mechanism operating in the first clamping drive disk is installed, so that then the lock unit unlocks the mechanism chassis to claim 1 or a clamping drive and the lock portions are provided at different rotational phase
Or, the mode switching device for the disc player described in 2 . 4. The clamp mechanism has a clamper that presses the disk against the rotary drive unit, and a clamp arm that supports the clamper and is biased in the disk pressing direction, and the control cam rotates at a predetermined angle. 4. The mode switching device for a disc player according to claim 1, wherein the clamp drive section sometimes raises the clamp arm in the disc pressing release direction.