JP3674001B2 - Disc clamp device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk clamping device, and more specifically, a disk provided with a turn table for rotating a disk in an apparatus for recording / reproducing various information, and a clamper for clamping the disk from above with the turn table. The present invention relates to a clamping device.
[0002]
[Prior art]
Conventionally, when recording / reproducing a disc such as a CD and a DVD, for example, a disc clamping device in which a turntable and a clamper are installed on a chassis is provided in the main body of a recording / reproducing device for housing the disc. Recording / reproduction was performed by securely holding the disc conveyed in the main body. This conventional disk clamp device has a structure in which a rotary arm having a clamper mounted on a chassis in a main body is pivotally supported, and by rotating the rotary arm, the clamper moves up and down on the turntable to hold the disk. It has. FIG. 8 is a block diagram showing a conventional disc clamping device employed in such a CD recording / reproducing apparatus. FIG. 9 is a diagram showing details of the shaft 52 shown in FIG. FIG. 10 is an operation explanatory view showing the operation of clamping the disc 1 by the disc clamping device shown in FIG. 8. FIG. 10 (a) shows the state before the disc 1 is clamped, and FIG. Indicates the state in which the disc 1 is sandwiched.
[0003]
As shown in FIG. 8, a conventional disc clamping device adopted in a CD recording / reproducing apparatus is housed in a main body 10 of a device for recording / reproducing a disc 1 such as a CD, and the main body 10 is elastic. The chassis 50 is provided with a turntable 56 that is supported in a floating state by an elastic body (not shown) and that rotates the disk 1 placed thereon, and one end of the chassis 50 can be rotated. A rotary arm 30 is provided which is supported and has a clamper 36 attached to the other end and lifts and lowers on the turntable 56 to clamp the disk 1.
[0004]
Here, the chassis 50 is supported in a floating state in the main body 10 via an elastic member (not shown), and is formed so that a predetermined impact can be absorbed by disposing the turntable 56 on the surface. . In addition, a plurality of optical components (not shown) such as an optical pickup for recording / reproducing the disk 1 are mounted on the chassis 50 in the vicinity of the turntable 56. The chassis 50 includes a pair of shafts 52 that rotatably support the rotary arm 30 and an engaging portion 58 that extends to one side of the shaft 52 and engages one end side of the pressure spring 18. ing.
[0005]
Further, the rotary arm 30 is provided with a rotation hole 32 that rotatably supports the clamper 36 at one end and is rotatably inserted into the shaft 52 of the chassis 50 on both side surfaces of the other end. The rotation hole 32 of the rotary arm 30 is rotationally engaged by being simultaneously inserted into the left and right shafts 52 installed in the chassis 50. The rotary arm 30 has a structure that rotates around the shaft 52 of the chassis 50 as a fulcrum and moves the clamper 36 up and down above the turntable 56. The rotary arm 30 is provided with an engagement portion 38 that engages the other end of the pressure spring 18 that is engaged with the chassis 50, and the pressure spring 18 is attached to the engagement portion 38 so that the turntable 56 Energized in the direction. Therefore, the clamper 36 presses the upper part of the disk 1 placed on the turntable 56 with a predetermined force by urging the rotary arm 30 in the direction of the turntable 56 by the pressure spring 18. And press to fix. The clamper 36 is designed to accurately transmit the force of the pressure spring 18 to the upper portion of the disk 1 while being supported by the rotary arm 30.
Further, as shown in FIG. 9, the shaft 52 of the chassis 50 is provided with an insertion guide portion F having a thin tip portion. Thereby, when the rotation hole 32 of the rotation arm 30 is inserted into the shaft 52, the hole position is easily determined by the insertion guide portion F, and the rotation arm 30 can be easily attached to the chassis 50.
[0006]
When the disc 1 is clamped by the conventional disc clamping device adopted in the CD recording / reproducing apparatus having such a configuration, the disc 1 is grasped and inserted into the main body 10 as shown in FIG. A conveying means (not shown) in the main body 10 conveys the disk 1 to a predetermined position of the turntable 56. At this time, as shown in FIG. 10A, the rotary arm 30 rotates the clamper 36 side with the shaft 52 of the chassis 50 as a fulcrum, and the clamper 36 is inclined so as to be separated from the turntable 56 at a predetermined interval. It is fixed in the state of letting. Accordingly, the disk 1 is transported between the clamper 36 and the turntable 56 by the transport means, and is placed on the top of the turntable 56. Thereafter, the rotary arm 30 is rotated by a rotation transmission means (not shown), and the clamper 36 is lowered onto the surface of the disk 1 as shown in FIG. At this time, the rotating arm 30 pressurizes the disc 1 with a predetermined force via the clamper 36 by the urging force of the pressurizing spring 18, and pressurizes and fixes the disc 1 on the turntable 56. As a result, the disc 1 is rotated by the turntable 56 and an optical component (not shown) such as an optical pickup provided on the chassis 50 is driven, whereby predetermined information is recorded / reproduced.
[0007]
As described above, the conventional disk clamp device pivotally supports the rotary arm 30 with the clamper 36 mounted on the chassis 50 including the turntable 56, and transports the disk 1 onto the turntable 56 to move the clamper 36. By lowering from the upper part, the disk 1 is securely sandwiched between the clamper 36 and the turntable 56 so that predetermined information is recorded and reproduced.
[0008]
[Problems to be solved by the invention]
However, in the conventional disk clamp device, as shown in FIG. 8, when the rotation holes 32 provided on both side surfaces of the rotary arm 30 are inserted into the pair of shafts 52 provided in the chassis 50, the rotation holes 32 are formed. There is a problem that it is necessary to insert the pair of shafts 52 simultaneously at the same timing, which makes it difficult to insert in the assembly process.
Further, in the conventional disc clamping device, when the rotation holes 32 of the rotary arm 30 are separately inserted into the pair of shafts 52 to facilitate the insertion work in the assembly process, the pair of left and right shafts 52 provided in the chassis 50 It is necessary to change the length of each, and there is a design limitation. When the shaft 52 is separately press-fitted into the chassis 50, it is necessary to prepare and insert two types of shafts, resulting in high manufacturing costs. was there.
Furthermore, in the conventional disc clamp apparatus, as shown in FIG. 9, the insertion guide portion F is formed on the shaft 52 of the chassis 50 so that the rotation hole of the rotary arm can be easily inserted. The length of the shaft 52 becomes longer due to F, so that there is a problem that the shaft 52 is broken or is difficult to obtain accuracy.
It is an object of the present invention to solve such problems, and to provide a disc clamping device that can improve the accuracy by minimizing the length of the shaft provided in the chassis and can easily insert the rotating hole of the rotating arm. To do.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a disc clamp device comprising a turntable for rotating a disc in a device for recording / reproducing various information, and a clamper for clamping the disc from above with the turntable. By providing a rotation hole that rotatably supports the clamper at one end and pivotally supported on both side surfaces of the other end, the clamper is rotated on the turntable using the rotation hole as a fulcrum. A rotary arm that moves up and down, and a pair of shafts that pivotally support the rotation hole of the rotation arm, and the rotation hole is positioned and slid to an insertion position where the rotation hole is inserted into the shaft. easily providing the chassis with the insertion auxiliary unit for insertion, the rotation arm forms a lower end of both side surfaces forming the pivot hole in a circular shape, the insertion assisting section a circular lower end of the rotary arm Rights Ru provided to position regulation by supporting the top or V-shaped slope either in the form of ribs extending.
[0010]
Here, insert the auxiliary unit is configured to support by placing the upper end of the rib which extends parallel circular lower end of the rotating arm, it is preferable to form the upper curved surface of the semi-circular shape. In addition, it is preferable that the chassis be formed so that the insertion operation of the rotation hole to be inserted into the shaft can be performed more effectively by disposing the shaft that pivotally supports the rotating arm so as to slightly protrude into the insertion assisting portion. . The disc is preferably an optical disc such as a DVD or a CD.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of a disk clamp device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a disc clamping device according to the present invention. 2 is a cross-sectional view showing a cross section taken along line AA shown in FIG. 3 is a cross-sectional view showing a cross section taken along line BB shown in FIG. 4 is a cross-sectional view showing a state in which the tip of the shaft 22 shown in FIG. Here, the disc clamping device shown in FIG. 1 is the same as the conventional disc clamping device shown in FIG. 8 except for the chassis, and the same components are denoted by the same reference numerals.
[0012]
As shown in FIG. 1, the embodiment of the disc clamping apparatus according to the present invention is employed in a CD recording / reproducing apparatus as in the prior art shown in FIG. 8, and the disc 1 (CD) is recorded / reproduced. The disc 1 is placed in the upper part of the recording / reproducing apparatus 10 to be reproduced and supported in a floating state by an elastic body (not shown) having elasticity in the main body 10. And a rotating arm that is supported on one end of the chassis 20 so as to be rotatable and a clamper 36 is attached to the other end of the chassis 20 to be moved up and down on the turntable 26 so as to sandwich the disk 1. 30.
[0013]
Here, the chassis 20 is supported in a floating state in the main body 10 via an elastic member (not shown), and the turntable 26 is disposed on this surface so as to absorb a predetermined impact. . In addition, a plurality of optical components (not shown) such as an optical pickup for recording / reproducing the disk 1 are mounted on the chassis 20 in the vicinity of the turntable 26. The chassis 20 includes a pair of shafts 22 that rotatably support both sides of the rotary arm 30, and an engagement portion 28 that is close to one side of the shaft 22 and engages one end side of the pressure spring 18. I have. Further, unlike the prior art shown in FIG. 8, the chassis 20 is provided with an insertion assisting portion 24 provided with a V-shaped inclined surface on the free end side where the shaft 22 extends.
[0014]
Further, as in the prior art shown in FIG. 8, the rotary arm 30 supports the clamper 36 rotatably at one end, and is inserted into the shaft 22 of the chassis 20 on both sides of the other end so as to be pivotally supported. A rotating hole 32 is provided. The rotation hole 32 of the rotary arm 30 is rotationally engaged by being simultaneously inserted into the left and right shafts 22 installed on the chassis 20 side. The rotary arm 30 has a structure that rotates around the shaft 22 of the chassis 20 as a fulcrum and moves the clamper 36 up and down above the turntable 26. The rotating arm 30 is provided with an engaging portion 38 that engages the pressure spring 18 engaged with the chassis 29. The pressure spring 18 is attached to the engaging portion 38 and biased in the direction of the turntable 26. doing. Accordingly, the clamper 36 urges the rotary arm 30 in the direction of the turntable 26 by the pressurizing spring 18 to pressurize the upper part of the disk 1 placed on the turntable 26 with a predetermined force. And press to fix. The clamper 36 is designed to accurately transmit the force of the pressure spring 18 to the upper portion of the disk 1 while being supported by the rotary arm 30.
[0015]
When mounting the rotating arm 30 formed in this way on the chassis 20, first, the rotation hole 32 formed on the side surface of the rotating arm 30 is mounted in accordance with the insertion assisting portion 24 of the chassis 20 as shown in FIG. 1. (Temporary placement). The rotary arm 30 has a semicircular lower end on the side surface on which the rotation hole 32 is formed, and the semicircular lower end is a V-shaped inclined surface of the insertion assisting portion 24 as shown in FIG. Is supported by contact. At this time, as shown in FIG. 3, the rotation hole 32 of the rotary arm 30 is positioned at the center position where the shaft 22 of the chassis 20 (see FIG. 1) extends by the insertion assisting portion 24. By sliding in the direction indicated by the arrow C, the shaft 22 can be easily inserted. Here, as shown in FIG. 4, the shaft 22 of the chassis 20 preferably protrudes from the insertion assisting portion 24 of the chassis 20 by a width D. As a result, the rotation arm 30 is inserted into the shaft 22 at the position of the width D shown in FIG. Therefore, the insertion work can be performed more effectively. When the disc 1 is clamped by using the embodiment of the disc clamp device according to the present invention, the disc 1 is clamped by the same operation as the conventional disc clamp device shown in FIG. The overlapping operation description is omitted.
[0016]
As described above, according to the embodiment of the disc clamp device according to the present invention, the insertion assisting portion 24 of the chassis 20 inserts the rotation hole 32 of the rotary arm 30 with the position being previously regulated at the center position of the shaft 22. The insertion operation of inserting the rotation hole 32 of the rotary arm 30 into the shaft 22 of the chassis 20 in the process becomes easy.
Further, according to the embodiment of the disk clamp device according to the present invention, as described above, the position of the rotation hole 32 of the rotary arm 30 is regulated by the insertion assisting portion 24 and inserted into the shaft 22. A pair of shafts 22 having the same shape can be used, the design is facilitated, and the cost can be reduced.
Furthermore, according to the embodiment of the disk clamp device according to the present invention, the shaft 22 of the chassis 20 is shown in FIG. Therefore, it is not necessary to form the insertion guide portion F of the prior art, and the length of the shaft 22 can be minimized, and breakage such as breakage can be prevented.
[0017]
Next, in the present embodiment, the purpose of restricting the position of the rotation hole 32 of the rotary arm 30 on the same rotation axis with respect to the shaft 22 installed in the chassis 20 is described above. Even if it is not substantially V-shaped like the shape of the portion 24, an edge guide that extends the rib and supports it at the end is also possible. FIG. 5 is a view showing another embodiment of the insertion assisting portion shown in FIG. 1 that is supported by the edge guide by the ribs as described above. 6 is a cross-sectional view showing a cross section taken along line EE shown in FIG. FIG. 7 is a view showing a state in which the tip of the rib 44a shown in FIG. 6 is formed into a semicircular curved surface.
[0018]
As shown in FIG. 5, another embodiment of the insertion assisting portion includes a chassis 40 that includes a shaft 42 that is inserted into the rotation hole 32 of the rotating arm 30 and pivotally supported. Two ribs 44a that are formed on the free end side and extend in parallel in the vertical direction and a connecting rib 44b that extends so as to connect one side of the parallel ribs 44a are integrally formed. This insertion assisting part 44 is placed (temporarily placed) on the lower end of a semicircular side surface in which the rotation hole 32 of the rotary arm 30 is formed, at the tip of two ribs 44a extending in parallel as shown in FIG. ) And the position of the rotation hole 32 of the rotary arm 30 is restricted to the center position of the shaft 42. Here, the tip of the rib 44a is preferably formed in a semicircular curved surface 45a as shown in FIG. The curved surface 45a is formed in a semicircular shape at the tip, so that burrs in resin molding can be suppressed, and errors can be prevented from occurring during position regulation.
[0019]
As described above, according to another embodiment of the insertion assisting portion, the rotation hole 32 of the rotary arm 30 is positioned at the center position of the shaft 22 in advance by the insertion assisting portion 24 composed of two ribs 44a extending in parallel. Since the insertion is restricted, the same effect as the insertion assisting portion shown in FIG. 1 can be obtained.
Further, according to another embodiment of the insertion assisting portion, since the structure of the insertion assisting portion 24 is a simple rib structure extending in parallel, the V-shaped insertion assisting portion shown in FIG. In comparison, the center position of the rotation hole 32 can be easily adjusted.
[0020]
As mentioned above, although the embodiment of the disk clamp device according to the present invention has been described in detail, the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist thereof.
For example, the embodiment in which the disc clamping device according to the present invention is employed in a CD recording / reproducing device has been described. However, the present invention is not limited to this, and the present invention can also be applied to a DVD optical disc recording / reproducing device.
[0021]
【The invention's effect】
As described above, according to the embodiment of the disk clamp device according to the present invention, the rotation hole of the rotary arm is preliminarily positioned at the center position of the shaft by the chassis insertion auxiliary portion, and thus the rotary arm is assembled in the assembly process. The insertion operation of inserting the rotation hole into the shaft of the chassis is facilitated.
Further, according to the embodiment of the disk clamp device of the present invention, the pair of left and right shafts provided in the chassis have the same shape in order to insert the shaft into the shaft by restricting the position of the rotation hole of the rotary arm by the insertion assisting portion. Can be used, and the design becomes easy and the cost can be reduced.
Furthermore, according to the embodiment of the disk clamp device according to the present invention, the position of the rotation hole of the rotary arm is regulated by the insertion assisting portion and inserted into the shaft, so there is no need to form the insertion guide portion on the chassis shaft. The length of the shaft can be minimized, and breakage such as breakage can be prevented.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a disk clamp device according to the present invention.
2 is a cross-sectional view showing a cross section taken along line AA shown in FIG. 1;
FIG. 3 is a cross-sectional view showing a cross section taken along line BB shown in FIG. 1;
4 is a cross-sectional view showing a state in which the tip of the shaft shown in FIG. 3 is slightly protruded into the insertion assisting portion.
FIG. 5 is a view showing another embodiment of the insertion assisting portion shown in FIG. 1;
6 is a cross-sectional view showing a cross section taken along line EE shown in FIG. 5;
7 is a view showing a state in which the tip of the rib shown in FIG. 6 is formed into a semicircular curved surface.
FIG. 8 is a configuration diagram illustrating a conventional disk clamp device.
FIG. 9 is a diagram showing details of the shaft shown in FIG. 8;
10 is an operation explanatory view showing an operation of clamping a disc by the disc clamp device shown in FIG. 8;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disc 10 Main body 18 Pressure spring 20 Chassis 22 Shaft 24 Insertion auxiliary part 26 Turntable 28 Engagement part 30 Rotation arm 32 Rotation hole 36 Clamper 38 Engagement part

Claims (4)

In a disc clamp device comprising a turntable for rotating a disc in a device for recording / reproducing various information, and a clamper for clamping the disc from above with this turntable,
The clamper is rotatably supported at one end, and is provided with a rotation hole rotatably supported on both side surfaces of the other end, and the clamper is rotated on the turntable with the rotation hole as a fulcrum. A rotating arm that moves up and down;
A pair of shafts that pivotally support the rotation hole of the rotation arm is provided, and the rotation hole is positioned and slid to an insertion position where the rotation hole is inserted into the shaft, and the rotation about the shaft Provide a chassis with an insertion auxiliary part that allows easy insertion of holes ,
The rotating arm has a circular lower end on both sides where the rotation hole is formed, and the insertion assisting portion is an upper end of a rib extending in parallel with the circular lower end of the rotating arm or a V-shaped slope. A disk clamp device characterized in that the position is regulated by supporting it in any shape . The disk clamp device according to claim 1 , wherein
The insertion assisting part is placed on and supported by the upper end of a rib extending in parallel with the circular lower end of the rotary arm, and the upper end is formed in a semicircular curved surface. Clamping device. The disk clamp device according to claim 1,
In the chassis, the shaft for supporting the rotating arm is arranged so as to slightly protrude in the insertion assisting portion so that the insertion operation of the rotating hole to be inserted into the shaft can be performed more effectively. A disc clamping device characterized by that. The disk clamp device according to claim 1,
The disc clamping apparatus, wherein the disc is an optical disc such as a DVD or a CD.

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