JPH10112102A - Disk positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a disk with high accuracy with a simple mechanism by rocking first and second disk guides, and providing a third disk guide to center the disks of large and small diameters by utilizing variations in rocking angles. SOLUTION: A small diameter disk 30 is held between first and second disk guides 23, 26, and is pulled into a device by a torque of a rotary roller 21, initially guided by the guides 23, 26. When the disk 30 is pulled in to some extent, it comes off front tapered parts 23c, 23d of the guide 23, and is rocked by a counterclockwise moment 27a generated by a spring 27. Therefore, a top of the disk is pulled into along the third, disk guide while being pressed against it, and is abutted to a positioning step 28 for the disk to be centered. A large diameter disk 32 is likewise pulled into the device, however, since the disk does not come off the tapered part 23c, 23d, it is abutted to a shaft 28d and centering position is determined. Thus, it is possible to obtain a high positioning accuracy for the disk with a simple mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk positioning device used for a car-mounted CD player or the like.

[0002]

2. Description of the Related Art FIGS. 4A and 4B show the structure of a conventional disk positioning apparatus of this type, wherein FIG. 4A is a schematic front view and FIG. 4B is a schematic side view. In FIG. 4, reference numeral 1 denotes a disk guide for guiding two types of disks 11 having a large diameter and a small diameter, and is fixed to the main chassis 2. Reference numeral 3 denotes a rotating roller, which is rotatably held by a feeder arm 4. The feeder arm 4 is rotatably held by rotating fulcrums 12 a and 12 b provided on the front chassis 12. Feeder arm springs 6a and 6b are hung between the front chassis 12 and the feeder arm 4,
The rotating roller 3 is urged in a direction to press the disk 11. Reference numeral 7 denotes a left centering lever, and 8 denotes a right centering lever, which determines the centering position of the disk 11. The left centering lever 7 and the right centering lever 8 are held by the clamp arm 17 so as to be rotatable around the support shafts 7a, 8a.
The sector gears formed on the respective partial peripheral surfaces mesh with each other and rotate synchronously. Disc detection shafts 7b and 8b are implanted at the distal ends of the centering levers 7 and 8, respectively. A centering stopper 9 is rotatably engaged with the shaft 8b. A shaft 9 a for detecting a large-diameter disc is implanted at the tip of the centering stopper 9. Reference numeral 10 denotes a centering cam plate, which is rotatably held by a clamp arm 17 about a support shaft 17a. In the centering cam plate 10, a cam hole 10c corresponding to a large-diameter disk and a cam hole 10B corresponding to a small-diameter disk are formed continuously, and a right alignment lever 8 is provided in each of the cam holes 10c and 10b. Shaft 8b and the shaft 9a of the centering stopper 9 are inserted. The centering cam plate 10 has an elongated hole 10a for transmitting an operation to the load clamp switching mechanism 16, through which the shaft 16a of the load clamp switching mechanism 16 passes.

Next, the operation of the above conventional example will be described.
2, when the disk 11 is inserted between the disk guide 1 and the rotating roller 3, the disk 11 is drawn into the apparatus along the disk guide 1 by the driving force of the rotating roller 3, and the right and left centering levers 7, 8 shafts 7b, 8b
Hit. At this time, in the large-diameter disk 11, the centering stopper 9 rotates around the shaft 8b at the same time as the shaft 9a of the centering stopper 9, and the centering cam plate 1
0 rotates around the support shaft 17a, and the cam hole position changes. On the other hand, in the case of the small-diameter disk 11, the centering levers 9 and 8 only hit the shafts 7a and 8a of the centering levers 9 and 8 and do not hit the shaft 9a of the centering stopper 9;
Does not change, and the position of the cam hole of the centering cam plate 10 does not change. The centering cam plate 10 has different cam holes 10 b and 10 c depending on the difference in the diameter of the disk 11, and the cam hole to be used is selected based on the difference in the position of the centering stopper 9. When the disk 11 is further pulled in, the left and right centering levers 7 and 8 rotate about the support shafts 7a and 8a, and the shaft 8b of the centering lever 8 moves along the cam hole of the centering cam plate 10. When the disk 11 comes to the centering position, the centering cam plate 10 rotates due to the cam hole shape of the centering cam plate 10, and the disk 11 comes to the centering position via the elongated hole 10a and the shaft 16a. Is transmitted to the load clamp switching mechanism 16, the shaft 8b of the centering lever 8 is fixed by the cam hole of the centering cam plate 10, and the position of the centering lever 7 is determined at the same time, so that the disk position is also determined.

As described above, in the above-described conventional disk positioning device, it is possible to position the disks 11 having different diameters at positions where they can be clamped, and to inform the load clamp switching mechanism 16 that the disks 11 have been positioned.

[0005]

However, in the above-mentioned conventional disk positioning apparatus, the positioning of the disk is performed using a pair of centering levers connected to each other by gears and a cam plate connected to one of the centering levers. Therefore, there is a problem that the positional accuracy is low and the mechanism is complicated.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide an excellent disk positioning device having a simple mechanism and high positioning accuracy.

[0007]

According to the present invention, in order to achieve the above object, a disk is inserted between a first disk guide and a second disk guide, and the disk is inserted between a second disk guide and a rotating roller. And draws it into the apparatus, and utilizes the difference in the diameter of the disk during the drawing to make the first and second
The disk guide is provided with a third disk guide which oscillates the disk guide and determines a centering position between the large-diameter disk and the small-diameter disk by utilizing the change in the angle. Since the change is performed by using the angle change of the first and second disk guides, it is possible to realize a highly accurate disk positioning device having a simple mechanism and few moving parts.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a first disk guide and a second disk guide which guide an inserted disk and swing by a difference in diameter of the inserted disk are provided. And a third disk guide having two centering positions according to a change in the angle of the disk caused by the swing of the first and second disk guides. Since the positioning is performed using the angle change of the first and second disk guides, it is possible to realize a highly accurate disk positioning device having a simple mechanism and few moving parts.

According to a second aspect of the present invention, there is provided a rotating roller for moving a disk, a first disk guide for guiding insertion of the disk and swinging only when a small-diameter disk passes, A second disk guide, which is arranged to be swingable opposite to the one disk guide and has a spring for pressing the inserted disk against the rotating roller and the first disk guide; and a second disk guide formed by swinging the first and second disk guides. A disk positioning device comprising: a third disk guide having two centering positions according to a change in the angle of the disk; and means for detecting that the disk is centered and shifting to a disk clamping operation. First and second positioning of disk and large diameter disk
Since the change is performed by using the change in the angle of the disk guide, a highly accurate disk positioning device having a simple mechanism and few movable parts can be realized.

Embodiments of the present invention will be described below with reference to the drawings. 1A is a schematic front view of a disk positioning device according to an embodiment of the present invention, FIG. 1B is a side view of the disk positioning device as viewed from the front, and FIG. FIG. 2 (b) is a side view of the same apparatus as viewed from the left side, and FIG. 2 (c) is a side view of the same apparatus as viewed from the right side. It is. In these figures, reference numeral 21 denotes a rotating roller for applying a driving force to the discs 30 and 32.
2 rotatably held. The rotating roller shaft 24 is
The roller drive unit 39 is connected via a gear train. 2
Reference numeral 3 denotes a first disk guide having tapered portions 23c and 23d on a front surface thereof for facilitating insertion of the disk. The rocker is supported so as to be able to swing. Reference numeral 26 denotes a second disk guide, which also has a tapered portion facing the first disk guide 23 for facilitating insertion of a disk, and guide holes 22 provided on both sides of the clamp chassis 22.
The guide shafts 26a and 26b are guided by the guide shafts a and 22d and are held swingably. Reference numeral 27 denotes a plate-shaped disc guide spring provided between the clamp chassis 22 and the second disc guide 26, and urges the second disc guide 26 in a direction of pressing against the rotating roller 21 and the first disc guide 23. . The disc guide spring 27 is disposed between the rotary roller 21 and the front tapered portions 23c and 23d of the first disc guide 23. 28
Is a step 2 for determining the centering position of the small-diameter disc 30.
8a and a third disc guide having shafts 28d and 28e for determining the centering position of the large-diameter disc 32, and a guide hole 22 provided in the clamp chassis 22.
b, 22c, 22e and 22f have the third disc guide 28
Guide shafts 28b, 28c, 28g and 28f are guided and held so as to be movable only in the vertical direction. This third
The disc guide 28 is urged away from the clamp chassis 22 by a plate-shaped disc guide spring 31 provided between the disc guide 28 and the clamp chassis 22. 2
9 detects that the small-diameter disk 30 and the large-diameter disk 32 have come to the centering position,
8, and is held rotatably about a rotation fulcrum 29c provided on the third disk guide 28. The switching lever 29 is provided with a protrusion 2 for detecting that the small-diameter disk 30 has come to the centering position.
9a, a shaft 29b for detecting that the large-diameter disk 32 has reached the centering position, and a load clamp switching mechanism 3
8 has a shaft 29d for transmitting the motion.

FIG. 3 shows a simplified configuration of the disk positioning apparatus in the above embodiment, and FIG.
3 shows a state in which the large-diameter disk 32 is located at the centering position, and FIG. 3B shows a state in which the small-diameter disk 30 is located at the centering position. An arrow 27a in FIG. 3B is centered on the rotating roller 21 generated by the disc guide spring 27 when the small-diameter disc 30 comes off the front tapered portions 23d of the first disc guide 23 when the small-diameter disc 30 is pulled in. Shows the moments that occur.

Next, with respect to the positioning operation in the above embodiment, the operation of the small-diameter disk 30 will be described first. When the small-diameter disk 30 is inserted between the first guide disk guide 23 and the second disk guide 26 from the opening of the main chassis 33, the leading end thereof is located between the rotating roller 21 and the second disk guide 26. It is pinched and drawn into the apparatus by the rotational force of the rotating roller 21. At the beginning of insertion, the small-diameter disk 30 is
And the second disk guide 26 guides and retracts the disk. However, when it is retracted to some extent, as shown in FIG.
3d, it is pulled along the third disk guide 28 while being pressed against the third disk guide 28 by a counterclockwise moment 27a about the rotating roller 21 generated by the disk guide spring 27. Thereafter, the small-diameter disk 30 hits the positioning step 28a of the third disk guide 28 for the small-diameter disk 30, and the centering position is determined. At the same time, as shown in FIG. 1A, the projection 29a of the switching lever 29 is pushed, and the switching lever 29 rotates clockwise around the rotation fulcrum 29c. By operating the section 38, the load clamp switching mechanism 3
By 8, the drawing operation of the small-diameter disk 30 shifts to the disk clamping operation. In other words, the small-diameter disc 30 is placed on the turntable 35 of the spindle motor 34, clamped by the clamper 36 and the clamper pressing spring 37, and becomes in a playable state.

Next, the positioning operation of the large-diameter disk 32 will be described. The operation of inserting the large-diameter disk 32 between the first disk guide 23 and the second disk guide 26 and being drawn into the apparatus by the rotating roller 21 is the same as that of the small-diameter disk 30. The difference is that the large-diameter disk 32 has a large diameter and does not come off from the tapered portions 23c and 23d of the first disk guide 23 as shown in FIG. For this reason,
The large-diameter disk 32 moves while being guided by the second disk guide 26 while being supported by the rotating roller 21 and the front tapered portions 23 c and 23 d of the first disk guide 23,
Positioning step 28 for small diameter disk of disk guide 28
It does not hit a, but passes under it and hits the large-diameter disk centering shafts 28d and 28e, and the centering position is determined. At the same time, as shown in FIG.
Of the rotation lever 29 is pushed.
The load clamp switching mechanism 38 rotates clockwise around the axis c, and is operated by the shaft 29d. Subsequent operations are the same as in the case of the small-diameter disk 30.

As described above, according to the present embodiment, the first disk guide 23 and the second disk guide 26, which guide the inserted disk and oscillate due to the difference in the diameter of the inserted disk, Third disk guide 2 having two centering positions according to angle change due to movement
8, the centering position of the disk is determined, so that the small-diameter disk 30 and the large-diameter disk 32 can be accurately positioned with a simple structure. In particular, since the third disk guide 28 for directly positioning the disk does not move, high positioning accuracy can be obtained.

[0015]

According to the present invention, as is apparent from the above embodiment, the disk positioning is constituted by a simple mechanism with a minimum number of movable parts. Disc positioning accuracy can be obtained.

[Brief description of the drawings]

FIG. 1A is a schematic front view of a disk positioning device according to an embodiment of the present invention. FIG. 1B is a schematic side view of the disk positioning device as viewed from the front.

FIG. 2A is a schematic side view of a centering state of a small-diameter disk of the apparatus viewed from the left side. FIG. 2B is a schematic side view of a centering state of a large-diameter disk of the apparatus viewed from the left side. Schematic side view of the right side

FIG. 3A is a schematic diagram of the same device at a centering position of a large-diameter disk. FIG. 3B is a schematic diagram of the same device at a centering position of a small-diameter disk.

FIG. 4A is a schematic front view of a conventional disk positioning device. FIG. 4B is a schematic side view of the disk positioning device as viewed from the front.

[Explanation of symbols]

 Reference Signs List 21 rotating roller 22 clamp chassis 23 first disk guide 24 rotating roller shaft 25 suspension chassis 26 second disk guide 27 disk guide spring 28 third disk guide 29 switching lever 30 small diameter disk 31 disk guide spring 32 large diameter disk 33 main chassis 34 Spindle motor 35 Turntable 36 Clamper 37 Clamper holding spring 38 Load clamp switching mechanism 39 Roller drive

Claims (2)

[Claims] A first disk that guides an inserted disk and swings due to a difference in diameter of the inserted disk;
A disk positioning device comprising: a disk guide; a second disk guide; and a third disk guide having two centering positions according to a change in the angle of the disk due to swinging of the first and second disk guides. 2. A rotating roller for moving a disk, a first disk guide that guides insertion of the disk and swings only when a small-diameter disk passes, and is swingable in opposition to the first disk guide. And a second disk guide having a spring for pressing the inserted disk against the rotating roller and the first disk guide, and two cores corresponding to a change in the angle of the disk due to the swinging of the first and second disk guides. A disk positioning device comprising: a third disk guide having a centering position; and means for detecting that the disk is centered and shifting to a disk clamping operation.