JPH08180537A - Mode switcher of disk player - Google Patents

Abstract

PURPOSE: To set the timing of clamp operation by mechanically detecting the carry-in of a disk in a disk player. CONSTITUTION: A roller 35 is driven by the rotary force of a large-diameter gear 70 and a disk if fed onto a mechanism chassis 24. When the disk presses a detection lever 93, the press force operates an intermittent member 91, a transfer member 81 is driven by a guide groove 92 of the intermittent member 91, a planetary gear 82 provided at the transfer member 81 is engaged to a rack 45, and a switching member 40 is driven in a direction to the right in the figure. Drive grooves 41a and 41b provided at the switching member 40 cause a control cam 50 to be rotated. A clamper 32 is lowered in the direction of a rotary drive part 26 due to the rotary force of the control cam 50 and a disk is installed, also a lock member 60 moves in a direction to the right in the figure and the lock of the mechanism chassis 24 is canceled, and the mechanism chassis 24 is elastically supported by a damper 25.

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 home-use CD player, an on-vehicle or home-use mini disc (MD) player, and the like. The present invention relates to a mode switching device for a disc player, which switches between clamping operation and non-clamping operation.

[0002]

2. Description of the Related Art In a disc player, a central portion of an exposed disc such as a compact disc (CD) is clamped or a disc such as a mini disc (MD) which is introduced in a cartridge is inserted. An operation of clamping the central portion is required, and this clamping operation is usually performed by the power of the motor.

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.

A switching member 16 for moving the rotating lever 13 is provided so as to move in the directions (a)-(b). As shown in FIG. 10, when the switching member 16 is driven in the (a) direction, the switching lever 16 pushes the rotary lever 13 to rotate clockwise, and the clamp arm 10 rotates counterclockwise. The clamper 11 is moved to the unclamped state in which it is separated from the turntable 8. When the switching member 16 is driven in the (b) direction, the rotating lever 13 rotates counterclockwise by the urging force of the spring 14, and the clamp arm 10 rotates clockwise as shown in FIG. Then, the central portion of the disk D guided onto the turntable 8 is clamped by the clamper 11.

Further, as the switching member 16 moves in the (b) direction, the roller supporting member 3 is driven counterclockwise as shown in FIG. 11, and the feed roller 4 retracts downward in the drawing. Further, in the state shown in FIG. 10, when the mechanism chassis 6 supported by a damper or the like is in a locked state with respect to the housing 1, and the switching member 16 is driven in the (b) direction and the disc D is clamped, The lock is released, and the mechanism chassis 6 is supported on the housing 1 in an elastically levitated state by a damper or the like.

As described above, in this type of disc player, the switching member 16 is driven in the (a)-(b) direction by the motor, and the switching between the clamping and the non-clamping is performed as the switching member 16 moves. The withdrawal of the feed roller 4 and the lock and unlock operations of the mechanism chassis 6 are performed. Therefore, it is necessary to move the switching member 16 in time with the introduction and ejection of the disc D.

Conventionally, as shown in FIG. 10, the clamper 1
When the insertion of the disc D from the insertion slot 2 is detected in the standby state in which 1 is separated from the turntable 8,
The solenoid operates to connect the power transmission path from the motor to the switching member 16, the switching member 16 is driven in the (b) direction, and the disc D is completely clamped as shown in FIG.

[0010]

In the structure in which the power of the motor is transmitted to the switching member 16 by using the solenoid described above, it is possible to accurately control the timing of the detection output of insertion of the disk D and the excitation of the solenoid. It is possible to perform a mode switching operation. However, the mode switching device using the solenoid has the drawback that not only the number of parts increases due to the provision of the solenoid, but the cost increases, and also the power consumption increases because the electromagnet of the solenoid is driven.

Further, as a system in which the solenoid is not used, a rack is provided on the switching member 16, and the switching member 16 is forcibly moved by utilizing the force of feeding the disk D, and is driven by a motor. The rack is engaged with the gear, and then the switching member 1 is rotated by the rotational power of the drive gear.
A structure for driving 6 is conceivable. However, in this case,
In order to control the moving distance of the switching member 16, it is necessary to control the drive time of the motor, which complicates the circuit configuration.

Further, for example, if the drive gear and the rack are continuously meshed when the motor is stopped at the time when the disk D is completely clamped, the motor may be operated at a predetermined timing due to a malfunction in the circuit. If you run away without stopping, the mechanism will be locked and it may cause a malfunction.
Furthermore, an excessive current flows through the motor, causing a circuit failure.

The present invention has been made to solve the above-mentioned conventional problems. The switching member is driven at the timing when the disc is introduced without the provision of an electric trigger means such as a solenoid, and the disc clamping operation is performed. It is an object of the present invention to provide a mode switching device for a disc player which can be performed.

Further, according to the present invention, when the power of the motor is being transmitted to the switching member, it is possible to continue the transmission of the power to the switching member during both forward rotation and reverse rotation of the motor. When the installation of the motor is completed, the power transmission path from the motor to the switching member is shut off so that the motor can be prepared for runaway or the like.

[0015]

A mode switching device for a disc player according to the present invention comprises a clamp mechanism for mounting a disc on a rotary drive unit and a switching member for reciprocating the clamp mechanism for operating the clamp mechanism. A drive gear that rotates in both forward and reverse directions by power from a motor; and a power transmission mechanism that can convert the rotational force of the drive gear into the moving force of the switching member and can intermittently transmit the power from the drive gear to the switching member. When the detection lever is pushed by the disc while the detection lever pushed by the introduced disc and the clamp mechanism does not clamp the disc,
An intermittent mechanism that sets the power transmission mechanism to a state in which power is transmitted from the drive gear to the switching member, and the clamping mechanism operates by the moving force of the switching member to which the power is transmitted, and the disc is installed in the rotary drive unit. It is characterized by being done.

In the above, the power transmission mechanism has a structure having a gear for transmitting the rotational force of the drive gear to the rack provided on the switching member and a transmission member for connecting / disconnecting the meshing of the gears. It is possible to have a structure having an interrupting member that moves when the detection lever is pushed by the disk, and a guide portion that is formed on the interrupting member and that guides the transmission member in the gear meshing direction. .

Further, in the guide portion, a holding guide portion for holding the state of transmission of power from the drive gear to the switching member immediately after the detection lever is pushed by the disc, and installation of the disc on the rotary drive portion are completed. In this case, it is preferable to have a release guide portion for cutting off the power from the drive gear to the switching member.

Further, the gears provided in the power transmission mechanism are
The transmission gear may be a planetary gear that always meshes with the drive gear, and the transmission member may be configured to planetarily move the gear to move in a meshing direction with the rack.

[0019]

In the above means, the disc is inserted with the clamp mechanism in the non-clamp state, the disc is fed by the transport mechanism, and when the disc moves to the final position of transport, the disc pushes the detection arm. When the detection arm is pushed, the interrupting mechanism operates to connect the power transmission path from the drive gear to the switching member. After that, the switching member is moved by the power of the motor, the clamp mechanism performs the clamp operation, and the disc is installed in the rotary drive unit and clamped. Alternatively, after this clamp, the mechanism chassis having the disc rotation drive unit is unlocked and elastically levitated by the moving force of the switching member, and further, the feed roller constituting the transport mechanism is separated from the disc. Retreat to the closed position.

In the case of a CD player or the like, the clamp mechanism is composed of a clamper and a clamp arm that supports the clamper, and the clamper and the rotary drive unit (turntable) clamp the disc.
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.

The power transmission mechanism includes, for example, a gear for transmitting the rotational force of the drive gear to a rack provided on the switching member,
The structure has a transmission member that connects and disconnects the meshing of the gears. By engaging or disengaging any gear in the transmission path from the drive gear to the rack,
Power is transmitted to or cut off from the switching member. Further, the gear may be a planetary gear that always meshes with the drive gear, and the transmission member may be a transmission lever that supports the planetary gear and rotates coaxially with the drive gear. Further, the interrupting mechanism guides the transmission member in the meshing direction of the gears with an interrupting member that rotates or slides when the detection lever is pushed by the disk and a member formed on the interrupting member. It is composed of a guide.

The guide portion is, for example, a guide groove, and a projection provided on the transmission member (transmission lever) is guided by the guide groove, and the engagement and disengagement of the gear are interlocked with the movement of the intermittent member. Can be structured to be done. Further, when the holding guide portion is provided in the guide portion, the power is continuously transmitted from the driving gear to the switching member while the transmission member is held by the holding guide portion. Therefore, it is possible to reverse the drive gear, and it is also possible to perform operations such as ejecting or re-introducing the disk by reverse rotation of the motor. Further, by providing the release guide portion in the guide portion, the power from the drive gear to the switching member is cut off when the disc is installed in the rotary drive portion. Therefore, there is no possibility that the mechanism will be locked or the circuit will fail due to the runaway of the motor after the disk is installed in the rotation drive unit.

[0023]

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 rotation 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 on both sides of the rear end of the mechanism chassis 24 by bending, 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 by 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.
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 are formed.

The mechanical chassis 24 of the lock member 60
The pair of wedge-shaped lock protrusions 64a and 6
4b is formed. A drive protrusion 54 and a stopper protrusion 55 are integrally formed on the surface of the control cam 50 facing the lock member 60. A lock portion 56 is formed on the outer periphery of the control cam 50. This lock part 5
Reference numeral 6 denotes 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, whereby the mechanism chassis 24 is locked in the housing 20.

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 drawing, and a restraining shaft 43 fixed inside the supporting piece 37a of the roller supporting member 37 can be fitted into the roller controlling 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. FIG.
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 interrupting 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.
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.
It is transmitted to the rack 45 via the and the switching member 40 starts to be driven in the (b) 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 restraining portion of the control groove 44 of the switching member 40 to be restrained. Enter 44b. Therefore, after that, the switching member 40 is changed to the one in FIG.
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 FIG. 5B to FIG. 5C, the transmission member 81 swings counterclockwise even if the large diameter gear 70 and the drive gear 71 rotate 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, the pins 52a and 52b of the control cam 50 are driven by the drive grooves 41a and 41b of the switching member 40 as shown in FIGS. 6 to 7.
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 protrusion 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, the control pin 95 of the interrupting member 91 causes the releasing portion 44c of the control groove 44 of the switching member 40 as shown in FIG. 5D.
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 disk loading operations 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 shown in FIG. 5D is reached, the planetary gear 82 separates from the rack 45 and the drive gear 71
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 discharge 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, the clamp of the disc D is released thereafter, and the feed roller 35 is raised to the position shown in FIG. Then, from the large diameter gear 70 to the roller gear 38
Is transmitted to drive the feed roller 35 in the clockwise direction, and the disc D is ejected from the insertion slot 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.

[0067]

As described above, according to the present invention, the detection lever detects that a disk has been introduced, and the rotational force of the drive gear is mechanically transmitted to the switching member in accordance with the detection timing. With this structure, the switching member can be always driven in time with the transfer state of the disk to perform the disk clamping operation.

Further, by providing a guide portion for moving the transmission member to the interrupting member provided in the interrupting mechanism, it is possible to always set the transmission and interruption of the power from the drive gear to the switching member at proper timing. Further, by providing the holding guide portion in the guide portion, when the switching member is moving, power can be continuously transmitted to the switching member regardless of the rotation direction of the drive gear, and the direction of introduction of the disc can be improved. The switching member can always be driven during the transfer and the discharge direction. Further, if a release guide portion is provided in the guide portion and the power from the drive gear to the switching member is cut off when the disc is completely installed, the control of the motor stop time can be rough and the motor Even if it runs out of control, it will not cause mechanical or circuit failure.

That is, according to the present invention, even if an electric trigger means such as a solenoid is not provided, the operation timing of the switching member is always set properly by using, for example, a planetary gear, and the disc clamping operation, Enables the locking operation of the mechanical chassis and the retracting operation of the feed roller.

[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 Mechanism Chassis, 24d Lock Pressing Piece 24e, 24f Lock Groove 25 Damper 26 Rotation Drive Unit 31 Clamp Arm 32 Clamper 35 Feed Roller 37 Roller Support Member 38 Roller Gear 40 Switching Member 42 Roller Control Groove 44 Control groove 45 Rack 50 Control cam 53 Clamp drive portion 54 Drive protrusion 56 Lock portion 60 Lock member 61 Fitting 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 Planet Gear 84 Guide pin 90 Intermittent mechanism 91 Intermittent member 92 Guide groove 92a Lock part 92b Swing guide part 92c Holding guide part 92d Release guide part 93 Detection lever D disk

Claims (4)

[Claims] 1. A clamp mechanism for installing a disk on a rotary drive unit, a switching member for reciprocating the clamp mechanism for operating the clamp mechanism, and a drive gear that rotates in both forward and reverse directions by power from a motor. A power transmission mechanism capable of converting the rotational force of the drive gear into the moving force of the switching member and intermittently transmitting the power from the drive gear to the switching member,
When the detection lever is pushed by the disc and the detection lever is pushed by the disc to be introduced and the detection lever is pushed by the disc, the power transmission mechanism transmits power from the drive gear to the switching member. A mode switching device for a disc player, characterized in that the clamping mechanism is operated by the moving force of the switching member to which the power is transmitted and the disc is installed in the rotary drive unit. 2. The power transmission mechanism includes a gear that transmits the rotational force of the drive gear to a rack provided on the switching member, and a transmission member that connects and disconnects the meshing of the gears. 2. The disc player according to claim 1, further comprising: an interrupting member that moves when is pushed by the disc, and a guide portion that is formed on the interrupting member and that guides the transmission member in the gear meshing direction. Mode switching device. 3. The guide part has a holding guide part for holding the power transmission state from the drive gear to the switching member immediately after the detection lever is pushed by the disk, and the installation of the disk on the rotary drive part is completed. 3. A mode switching device for a disc player according to claim 2, further comprising a release guide portion for cutting off power from the drive gear to the switching member. 4. The gear provided in the power transmission mechanism is a planetary gear that always meshes with the drive gear, and the transmission member is a planetary gear that moves the gear in a meshing direction with the rack. 2. A mode switching device for a disc player as described in 2 or 3.