JPH0644659A - Disk player - Google Patents

Abstract

PURPOSE:To clamp a disk in setting the rotational center of a turntable to the center of the disk without providing a complicated mechanism. CONSTITUTION:The disk 4 is inserted, and when its inserting tip-most part is restrained by a half punch 12c, the rotational center of the turntable is conformed with the center of the disk. Under this condition, when a clamp arm 15 is turned around a shaft in the middle of the arm as a center in the direction of a clamp, a bend 12b is moved in the direction opposite to the disk, and the half punch 12c is moved in the direction of separating from the inserting tip-most part of the disk, so that the restraining state is released. Under the state of conforming of the rotational center of the turntable with the center of the disk, the disk is clamped by a clamper 5a provided at the tip part of the clamp arm 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player provided with a clamp arm having a clamp member for holding a disc between a turntable and a disc, and more particularly to aligning the center of the disc with the center of the turntable. The present invention relates to a disc player having a mechanism capable of performing.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a schematic configuration of a conventional vehicle-mounted disc player. A disc player 1 shown in the figure includes a housing 2 having a front surface formed with an insertion hole 2a for a disk 4, and a pickup chassis 3 elastically supported by an elastic member such as a damper 9 in the housing 2. I have it. A pair of take-in rollers 7 and 8 for taking in the inserted disc 4 onto the pickup chassis 3 are provided on the inner side of the insertion hole 2a.

Further, standing pieces 3a, 3a are provided at the rear end of the pickup chassis 3. A clamp arm 5 is rotatably supported on shafts provided on the upright pieces 3a, 3a, and the clamp arm 5 is biased toward the pickup chassis 3 by a spring (not shown). A clamper 5a is rotatably supported on the tip of the clamp arm 5. Further, a drive member 6 slidably supported in the directions of the arrows A1 and A2 (the insertion and ejection direction of the disk 4) is attached to the inner wall of the housing 2 so that it can be appropriately slid by a motor or the like not shown. Has become.

The drive member 6 is driven by the power of the motor A1.
When driven in the direction, the pin member 6c provided on the drive member 6 abuts and slides on the inclined portion 5c of the locking portion 5b provided on the clamp arm 5, and the moment generated at this time causes the clamp arm 5 to move. Rotates upward to open, and the disk 4 becomes unclamped. At the same time, the pin member 3 provided on the side surface 3d of the pickup chassis 3 in the groove portion 6b of the cutout portion 6a formed in the driving member 6.
c is relatively moved and inserted, and the vertical movement of the pickup chassis 3 is restricted. In this manner, in the housing 2, the clamper 5a is separated from the turntable 3b while the movement of the pickup chassis 3 supported by the damper 9 is restricted and locked, and is fed by the take-in rollers 7 and 8. Wait for 4.

When the disk 4 is inserted into the housing 2, the driving member 6 is driven in the A2 direction and the pin member 6 is driven.
c is separated from the inclined portion 5c of the locking portion 5b, the clamp arm 5 is lowered by the urging force of a spring (not shown), and the disc 4 is clamped on the turntable 3b. At the same time, the restricting groove 6b is separated from the pin member 3c, and the restricting member that restricts the movement of the pickup chassis 3 in the A1 direction is separated, so that the pickup chassis 3 is elastically supported by the damper 9. Playback operation is performed.

[0006]

However, in the disc player 1 having the above structure, in order to prevent mis-clamping of the disc 4 and to accurately rotate the disc 4, the rotation center of the turntable 3b and the center of the disc 4 are set. A mechanism for aligning is required. As an example,
It is conceivable to provide the protrusion 3e as shown in FIG. 6 at the rear end of the pickup chassis 3. In this mechanism, when the tip end of the disk 4 comes into contact with the protrusion 3e, the position of the disk 4 is regulated and the position of the disk 4 is determined so that the rotation center P of the turntable 3b and the center of the disk 4 are aligned. Are overlapped in the vertical direction.
However, when the disk 4 is clamped in a state where the disk 4 is in contact with such a projection 3e and the disk 4 is driven to rotate, the outer circumference of the disk 4 is projected to the projection 3e.
It will slide and be damaged.

Therefore, an object of the present invention is to provide a disc player capable of aligning the center of rotation of a turntable with the center of a disc without providing a complicated mechanism.

[0008]

A structure of the present invention for achieving the above object is to provide a turntable on which a disc is installed, a clamp member for clamping the disc between the turntable, and the clamp member. A clamp arm that is rotatably provided at one end side and that is rotatably provided in a direction in which the clamp member comes into contact with and separates from the turntable with a rotation support portion provided at an intermediate portion as a fulcrum is provided. In the disc player, a positioning locking portion is provided on the other end side of the rotation support portion of the clamp arm with which the tip of the disc can come into contact when the clamp arm is in the unclamped state. The center of the disc and the center of rotation of the turntable almost overlap when the leading edge of the disc contacts the positioning locking part. It is characterized in that so.

[0009]

According to the above means, when the disc is unclamped, the leading edge of the disc is brought into contact with the positioning locking portion so that the center of the disc and the center of rotation of the turntable are substantially overlapped with each other. In this state, when the clamp arm is rotated in the clamp direction with the rotation support part in the middle part of the clamp arm as a fulcrum, the positioning locking part is moved in a direction away from the disc insertion leading end part, The disc is clamped on the turntable by a clamp member provided on the clamp arm.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the configuration of a vehicle-mounted disc player as one embodiment of the present invention, FIG. 2 is a partially enlarged view showing a positioning locking portion formed on a clamp arm, and FIGS. 3 and 4 (a). , (B) are operation explanatory views of a vehicle-mounted disc player as one embodiment of the present invention. In the disc player 11 shown in FIG. 1, reference numeral 15 is a clamp arm, which is a standing piece 3 of the pickup chassis 3.
It is rotatably supported by shafts (rotational support portions) 15d provided on a and 3a. This shaft 15d is the clamp arm 1
5 is provided in the middle part. Further, the clamp arm 15 is urged by a spring (not shown) so that the clamper 5a is directed toward the turntable 3b. The clamper 5a is the tip of the clamp arm 15, that is, the shaft 15.
It is rotatably supported on the front side of d. A disc insertion guide portion 12 is formed behind the clamper 5a by press molding or the like.

An inclined portion 12a inclined upward in the drawing is formed at the tip of the guide portion 12, and the disc 4
When the tip is inserted so as to be inclined upward, this inclined portion 1
It is configured to be guided in the direction of the pickup chassis 3 by 2a. At the rear end of the guide portion 12, a bent portion 12b bent downward is formed. The bent portion 12b is located rearward of the shaft 15d, and when the clamper 5a moves in the direction of the turntable 3b due to the pivotal movement of the clamp arm 15 around the shaft 15d, the bent portion 12b is bent in reverse. The curved portion 12b moves in a direction away from the tip of the disc 4.

Inside the bent portion 12b, the disk 4 is
The half punch 12c is provided as a positioning locking portion for locking the insertion leading edge portion of the. This half punch 1
As shown in FIG. 2, the gap D1 between 2c and the lower surface of the guide portion 12 is formed to be smaller than the thickness D0 of the disc 4 so that the inserted disc 4 does not enter the gap D1. ing. The disk 4 is positioned by bringing the tip of the disk 4 into contact with the half punch 12c. At this time, the respective dimensions such as the protrusion dimension of the half punch 12c are set so that the center of rotation of the turntable 3b and the center of the disk 4 coincide with each other in the vertical direction. Although the half punch 12c is integrally formed with the guide portion 12,
The positioning and locking portion is a separate body from the guide portion 12,
This may be fixed by attaching it to the bent portion 12b.

Next, the operation of the disc player having the above construction will be described with reference to FIGS. 3 and 4A and 4B. First, when the drive power is input or the disc 4 is ejected from the housing 2, the drive member 6 is driven in the A1 direction by the power of the motor, and the pin member 6c provided on the drive member 6 is clamped by the clamp arm 15. Locking part 5b provided on the
It contacts and slides on the inclined part 5c. The moment generated at this time causes the clamp arm 15 to rotate clockwise about the shaft 15d as a fulcrum to be in the open state, and the clamper 5a.
Is separated from the turntable 3b and is in an unclamped state. At the same time, the pin member 3c provided on the side surface 3d of the pickup chassis 3 is relatively moved and inserted into the groove 6b of the notch 6a formed in the drive member 6, and the vertical movement of the pickup chassis 3 is restricted. . In this way, in the housing 2, the clamper 5a is separated from the turntable 3b while the movement of the pickup chassis 3 supported by the damper 9 is regulated and locked, and the bent portion 12b is rotated clockwise. It waits for the disk 4 sent by the take-in rollers 7 and 8 in a rotated state.

When the disc 4 is inserted into the disc player in the standby state in a tilted state, the disc 4 comes into contact with the inclined portion 12a of the guide portion 12 and slides (see FIG. 3).
reference). As a result, the direction of the disc 4 is corrected and further inserted. After that, when the leading edge of the disk 4 comes into contact with the half punch 12c, the center of rotation of the turntable 3b and the center of the disk 4 overlap each other in the vertical direction. Then, the disk 4 descends and is placed on the turntable 3b (see FIG. 4A).

After the disc 4 is completely inserted and placed, the drive member 6 is driven in the A2 direction, the pin member 6c is separated from the inclined portion 5c of the engaging portion 5b, and the clamper 5a is urged by the spring (not shown). Is moved in the direction of the disk 4 about a shaft 15d in the middle of the clamp arm 15. At this time, the bent portion 12b rotates counterclockwise in FIG. 4A, and the half punch 12c moves the disc 4
The insertion is moved away from the tip. Then, the disk 4 is turned by the clamper 5a into the turntable 3
It is clamped on b (see FIG. 4 (b)).

As described above, according to the above-described embodiment, the leading edge of the disk 4 is brought into contact with the half punch 12c, whereby the center of rotation of the turntable 3b and the disk 4 are rotated.
The center of the half punch 12c can be aligned, and the half punch 12c can be separated from the tip end portion of the disk 4 to be inserted together with the rotation operation of the clamp arm 15.
Therefore, when the disc 4 is rotationally driven, the outer periphery of the disc is not damaged.

[0017]

According to the present invention described in detail above, the rotation fulcrum part of the clamp arm is provided in the middle part of the clamp arm, and the disc is locked by the positioning locking part provided at the rear end part. With such a simple configuration, the center of rotation of the turntable and the center of the disk can be aligned in a state of substantially overlapping each other. Further, the positioning locking portion can be separated from the disc by the pivotal movement of the clamp arm with the pivotal support portion as a fulcrum, and the disc is not damaged when being rotationally driven.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a vehicle-mounted disc player as one embodiment of the present invention.

FIG. 2 is a partially enlarged view for explaining a half punch that serves as a positioning locking portion.

FIG. 3 is an operation explanatory diagram of a vehicle-mounted disc player as one embodiment of the present invention.

4A and 4B are explanatory diagrams of a clamp operation of a vehicle-mounted disc player.

FIG. 5 is a perspective view showing a schematic configuration of a conventional disc player.

FIG. 6 is an explanatory diagram for explaining a conventional problem.

[Explanation of symbols]

 3 pickup chassis 3b turntable 3c pin member 4 disc 12 insertion guide member 12a inclined part 12b bent part 12c half punch (positioning locking part) 15 clamp arm 5a clamper 5b locking part 5c tilting part 15d shaft (rotating support member) )

Claims (1)

[Claims] 1. A turntable on which a disc is installed, a clamp member for clamping the disc between the turntable and the turntable, which is rotatably provided at one end and is provided at an intermediate portion. In a disc player provided with a clamp arm rotatably arranged in a direction in which the clamp member comes into contact with and separates from the turntable with a fulcrum as a fulcrum, a rotation support portion of the clamp arm is provided. On the other end side, there is provided a positioning locking portion with which the tip of the disk can come into contact when the clamp arm is in the unclamped state, and when the leading edge of the disk comes into contact with the positioning locking portion. A disc player, wherein the center of the disc and the center of rotation of the turntable substantially overlap with each other.