JPH04364264A - Disk positioning mechanism - Google Patents

Abstract

PURPOSE:To set a disk inserted from a disk insert hole to have a prescribed positional relationship to a turntable in accordance with a shape of the disk. CONSTITUTION:The mechanism is provided with a stopping means 5 for abutting the disk to stop moving the disk and a guide plate 6 for freely rotatably supporting the stopping means 5 and capable of freely sliding in the disk inserting direction, and moreover, the stopping means 5 is provided with circular arcuate parts 51 to be abutted against the side surface of the disk and lock pins 52 for restraining the stopping means 5 to prevent the guide plate from sliding in accordance with a vibration of the circular arcuate parts. Since the disk is inserted to reach the deepest part of the circular arcuate parts, the center of the disk is positioned on a prescribed center line in its final position, and the stopping means is rotated in accordance with the circular arc of the side surface of the disk, whereas its rotating amt. is different between a large disk and a small disk, and according to this rotating amt., the guide plate for supporting the stopping means is slid, so that a moving amt. of inserting a disk is naturally decided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc position setting mechanism for setting a disc inserted through a disc insertion slot into a predetermined positional relationship with respect to a turntable depending on the shape of the disc.

0002

[Prior Art] Conventionally, in the disc position setting mechanism of a compact disc player, etc., there are multiple standards for the size of the disc, so the disc inserted from the disc insertion slot is placed in a predetermined position on the turntable according to its shape. The positional relationship is set to be as shown in, for example, Japanese Unexamined Patent Publication No. 2-96973. Such a disk position setting mechanism includes, for example, a guide pin that slides perpendicularly to the insertion direction of the disk, and the guide pin positions the disk at a predetermined center position.
The amount of disk insertion movement was determined by the movement of the guide pin. More specifically, the guide pins pinch the sides of the disc with forces that act symmetrically across a predetermined center line, thereby guiding the disc so that it is inserted on a straight line that includes the center of the turntable. The size of the disk was determined based on the amount of movement of the guide pin, and the amount of insertion and movement of the disk was determined, thereby setting the center of the disk at a predetermined position above the turntable.

0003

[Problem to be Solved by the Invention] Using a guide pin that slides in a direction perpendicular to the insertion direction is effective in regulating movement along the center line, but it is difficult to determine the amount of insertion movement. The mechanism of the means for this (for example, a link mechanism with the end point position regulating plate that regulates the final position of movement, means for controlling the motor of the roller that moves the disk, etc.) becomes complicated and the control accuracy becomes high, making adjustment complicated. This caused problems such as difficulty in assembly and misalignment during use.

0004

[Means for Solving the Problems] The present invention has been made in consideration of the above-mentioned points, focusing on the fact that the difference in the size of the disk means that the angle formed by the circular arc on the side surface of the disk at a predetermined position is different. It has a stop means that comes into contact with the disk so as to stop the movement of the disk, and a guide plate that rotatably supports the stop means and is slidable in the insertion direction of the disk, and the stop means is attached to the side surface of the disk. A locking pin that locks a stop means to prevent sliding of the guide plate according to the deflection of the guide plate is provided. A pair is prepared so as to be arranged in symmetrical positions, and the circular arc portion is biased inward so as to surround a small area.

[0005]

[Operation] As a result, the disk is inserted so as to reach the deepest part of the arc, so at the final position, the center of the disk is located on the predetermined center line, and at that time, the stopping means rotates according to the arc on the side of the disk. The amount of rotation differs between a disk and a small disk, and the guide plate that supports the stop means slides according to the amount of rotation, so the amount of insertion and movement of the disk is also determined in accordance with the size of the disk.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a plan view of essential parts of a disc player equipped with a disc position setting mechanism according to an embodiment of the present invention, and FIG. 2 is a side sectional view thereof. In these figures, the disk insertion slot A is located near the edge of the top surface of the chassis 1, and both are located above the figures. A disk (not shown) inserted through the insertion slot A is sent toward the bottom of the figure by a roller 2 along the back side of the top surface of the chassis 1, and is moved toward the turntable 3 according to the shape of the disk. The positions are set to have a predetermined positional relationship. Here, when a disc is inserted, it is inserted in a straight line so as to correspond to the center of the turntable, and in terms of structure, it is a linear disc insertion that connects the center of the insertion slot and the upper center of the turntable. The course will be referred to as the insertion center line B from now on.

Reference numeral 4 denotes a clamp plate rotatably fixed to the chassis 1, which has a clamp member 40 at its tip corresponding to the position of the turntable 3, and a clamp plate 4 provided substantially parallel to each other in the center. Sliding grooves 41 and 42 made of book holes and a locking groove 43 are provided, and a locking plate 44 is arranged at the rear.

Reference numeral 5 denotes a stopping means that comes into contact with the disk so as to stop the movement of the disk. Reference numeral 6 denotes a guide plate that rotatably supports the stopping means 5 and is slidably attached to the clamp plate 4.

The stopping means 5 includes a circular arc portion 51 that comes into contact with the side surface of the disk, and a lock pin 52 that locks the stopping means 5 to prevent sliding of the guide plate 6 according to the deflection (amount of rotation) of the circular arc portion 51. The lock pin 52 is located on the back side of the arc portion 51 and inserted into the lock groove 43 of the guide plate 4. Further, this stopping means 5 has a circular arc portion 51 that is aligned with the insertion center line B.
A pair of circular arc parts 51 are arranged in a line symmetrical position to form a wide-mouthed string on the insertion port side, and the circular arc parts 51 surround a small area, that is, the two circular arc parts By hanging the spring 55 between the claws 54 provided near the rotating shaft 53 so as to narrow the longer string on the side of the disc insertion port A of the two strings formed by the edges of the section 51, both strings are narrowed. The stop means 5 is energized inward. The above-mentioned lock groove 43 has a hook shape in which the insertion port A side is slightly bent toward the outside of the insertion center line B, so when the stop means 5 is located closest to the insertion port A side, this bias , the lock pin 52 is located at a hook-shaped bent portion of the lock groove 43.

The guide plate 6 also has rotating shafts 5 near both ends thereof.
3 to rotatably support the stop means 5, and has a sliding pin 61 inserted into the sliding groove 41 of the clamp plate 4 in the center. The sliding groove 41 is provided along the insertion center line B, so that the guide plate 6 can freely slide in the disk insertion direction. The guide plate 6 is urged toward the insertion port A by a spring 62 hooked between a claw protruding from one sliding groove 42 and a claw provided on the clamp plate 4. As a result, the stop plate 5 is normally located closest to the insertion port A, but if the stop plate 5 moves farthest from the insertion port A due to force, it is necessary to move the stop plate 5 away from the other sliding groove 42 in order to maintain that state. The claws of the protruding guide plate 6 may be locked with the lock plate 44.

In such a configuration, when a disk is inserted into the insertion slot A, a detector (not shown) detects this, and the roller 2 rotates to convey the disk to the back.

[0012] The roller 2 is located on the back side of the top surface of the chassis 1 when the disc is being transported, and is separated from the top surface of the chassis 1 when the disc is clamped to the turntable 3. Crimping can be easily attached to chassis 1 with screws, but roller 2 may
is often tilted and the conveying forces on the left and right sides of the disk become unbalanced. For this purpose, it is preferable that the left and right axes of the roller 2 are supported by independent springs 22 and rotating members 23 and 24. Further, when the roller 2 is not provided, the operator may push the disk by hand.

In such transportation, the center of the disk often does not pass through the insertion center line B. For example, when inserting a disk with a large diameter, as the disk is transported, the edge of the disk passes over the turntable 3 and approaches the stop means 5. If the disk deviates from the insertion center line B, it will first touch the edge of the arcuate portion 51 of one of the stop means 5, and as shown in FIG. Rotate only. However, the two stop plates 5 are connected by a guide plate 6, and the lock pin 52 of the non-rotating stop means 5 is located in the hook-shaped bent portion C of the lock groove 43, so the stop means 5 does not slide backward. , the position in the direction along the insertion center line B remains unchanged. Since the disk 7 is further transported in this state,
The disk 7 moves toward the center along the arc portion 51 of the rotated stop plate 5 and moves a little further toward the back, and finally comes into contact with both stop plates 5. As a result, the position of the disk 7 is corrected in the direction perpendicular to the insertion direction, and the center of the disk is positioned approximately on the insertion center line B. This effect makes no difference whether the diameter of the disk is large or small.

Next, if the disk 7 is large, it will also push the edge of the arcuate portion 51 of the other stop means 5, trying to push both stop means 5 apart against the biasing force of the spring 55. . In other words, if the disk is large, any stop means 5 will first turn to the right from the edge located on the outside of the circular arc portion 51. Therefore, as the disk 7 is transported, both stop means 5 rotate, whereby the lock pin 52 is positioned in the straight portion of the lock groove 43. In this state, sliding of the guide plate 6 cannot be prevented, so the stop means 5 slides backward (in a direction away from the insertion port A) by the guide plate 6. When the sliding pin 61 is located at the edge of the sliding groove 41, the stopping means 5 and the guide plate 6
The sliding of the disk 7 stops, and as the disk 7 is further conveyed, the disk is slid to the innermost position by both arcuate portions 51, resulting in the state shown in FIG. As a result, the center position of the disk is finally corrected both in the insertion direction and in a direction perpendicular to the insertion direction, and as a result, the disk is positioned at a predetermined position above the turntable 3. Thereafter, if necessary, the guide plate 6 may be locked with the lock plate 44, and the clamp plate 4 may be rotated to clamp the disk.

When the disk 7 is small, one of the stop means 5 rotates after passing through a state corresponding to FIG. After correcting the position toward the center along , and coming into contact with the other stop means 5, the disk moves differently from the large disk described above. Because the diameter of the disk is small, the other stop means 5 cannot be rotated, and as the disk moves toward the center, the rotated moving means 5 returns to its original position. Therefore, as shown in FIG. 5, the lock pins 52 of both moving means 5 are located at the hook-shaped bent portions of the lock grooves 43 and prevent the guide plate 6 from sliding. is stopping means 5
is pushed toward the back of the center along the circular arc portion 51 while remaining closest to the insertion port A, and in this state, the disk position setting is completed. In this state, the center position of the disk is finally corrected both in the insertion direction and in the direction perpendicular to the insertion direction, and as a result, the disk is positioned at a predetermined position above the turntable 3. Thereafter, the disk may be clamped by rotating the clamp plate 4 as necessary.

In this way, the disk is inserted so as to reach the deepest part of the arc, so at the final position, the center of the disk is located on the predetermined center line, and at that time, the stopping means rotates according to the arc of the side surface of the disk. The amount of rotation differs between a large disk and a small disk, and since the guide plate supporting the stop means slides according to the amount of rotation, the amount of insertion and movement of the disk is also determined automatically. The above-mentioned operation can be performed reliably if the curvature of the circular arc portion is equal to or larger than the curvature of the largest disk.

[0017]

Effects of the Invention As described above, the stopping means rotates due to the side surface of the disk, but the amount of rotation is different for large disks and small disks, and the guide plate supporting the stopping means slides according to the amount of rotation, so the insertion movement of the disk is reduced. The amount is determined,
Also, since the disk is inserted so as to reach the deepest part of the arc, the center of the disk will be located on the predetermined center line at the final position, so the center position of the disk will be set at the predetermined position regardless of the size of the disk. Ru. And such position setting supports the rotating stop means and the stop means,
It consists of a guide plate that slides according to the amount of rotation.
There is no need for a complicated structure such as a special link mechanism that regulates the position in the direction perpendicular to the insertion direction and determines the amount of insertion movement, and there is no need for a complicated mechanism such as a motor control means for the roller that moves the disk. Since the control accuracy does not increase, assembly is easy, and problems such as misalignment during use do not occur.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts of a disc player equipped with a disc position setting mechanism according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the disc player of FIG. 1;

FIG. 3 is a plan view of essential parts for explaining the operation of the disk position setting mechanism of the present invention.

FIG. 4 is a bottom view of essential parts for explaining the operation of the disk position setting mechanism of the present invention.

FIG. 5 is a bottom view of essential parts for explaining the operation of the disk position setting mechanism of the present invention.

[Explanation of symbols]

1 Chassis 2 Roller 3 Turntable 4 Clamp plate 5 Stopping means 51 Arc part 52 Lock pin 6 Guide plate

Claims (1)

[Claims] Claim 1: In a disc position setting mechanism that sets a disc inserted through a disc insertion slot so that it has a predetermined positional relationship with respect to a turntable according to its shape, the mechanism contacts the disc so as to stop the disc from moving. It has a stopping means, and a guide plate that rotatably supports the stopping means and is slidable in the disk insertion direction, and the stopping means has a circular arc portion that abuts the side surface of the disk, and a guide plate that rotates according to the deflection of the circular arc portion. A disk position setting mechanism characterized by comprising a lock pin that locks a stop means to prevent sliding of a plate.