JP4265090B2 - Disk device support and fixing mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support / fixing mechanism for a disk device that supports and fixes a disk device that performs recording and / or reproduction with respect to an optical disk using laser light to a mechanical deck chassis.
[0002]
[Prior art]
A disk device that performs recording and / or reproduction with respect to an optical disk using a laser beam needs to prevent transmission of vibrations from the outside in order to reliably perform recording and / or reproduction. Is fixed to the mechanical deck chassis through a rubber insulator as a damper.
[0003]
[Problems to be solved by the invention]
However, the conventional disk device is fixed to the mechanical deck chassis by pressing the rubber insulator against the surface of the mechanical deck chassis to support the disk device. In this method, the insulator is restrained more than necessary. Cannot be fully exhibited, and the vibration-proof characteristics are not sufficient.
[0004]
The present invention has been made in consideration of the above points, and an object thereof is increased vibration characteristics due to insulator disk device.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention relates to a support and fixing mechanism for a disk device that supports and fixes a disk device that performs recording and / or reproduction with respect to an optical disk using a laser beam to a mechanical deck chassis via an insulator . A required number of insulators are attached to the base chassis of the disk device, and a positioning receiving portion for positioning and supporting the insulator is provided on the mechanical deck chassis. The insulator includes a first recess and a first recess provided at the center of the first surface. A second recess provided in the center of the second surface opposite to the surface, and the positioning receiving portion is fitted in the center shaft and the second recess fitted in the first recess of the insulator. And a receiving portion that supports the insulator, is provided radially from the central shaft portion, and the insulator placed on the receiving portion is sandwiched between the central shaft portion and the pressing portion .
[0006]
The said structure WHEREIN: It can be set as the structure which formed the receiving part which supports the insulator of the positioning receiving part provided in a mechanical deck chassis with the radial rib.
[0007]
In the above configuration, it is preferable that the receiving portion for supporting the insulator of the positioning receiving portion provided in the mechanical deck chassis is formed by a substantially cross-shaped rib.
[0008]
Furthermore, in the said structure, the receiving part which supports an insulator can be set as the structure formed by casting integrally with the mechanical deck chassis.
[0009]
Therefore, in the support and fixing mechanism of the disk device according to the present invention, the insulator supporting the disk device is not directly pressed against the surface of the mechanical deck chassis but is received by the radial receiving portion of the positioning receiving portion, so that the restraint is moderately The damper effect is pulled out and the vibration resistance characteristics by the insulator of the disk device are improved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
In this embodiment, the present invention is applied to a mounting portion of a disk device in a DVD player. FIG. 1 shows an example DVD player to which the present invention is applied, FIG. 2 shows an exploded perspective view of a mounting portion on the cabinet chassis side of the disk device in the DVD player shown in FIG. 1, and FIG. 4 shows a perspective view of the disk device supporting portion with the insulator removed, FIG. 4 shows a perspective view of the disk device supporting portion with the insulator attached, and FIG. 5 shows the cabinet chassis side mounting portion. An example perspective view is shown, and FIG. 6 shows a cross-sectional view of a state in which the support part of the disk device is attached to the attachment part on the cabinet chassis side.
[0011]
The DVD player shown in FIG. 1 is a portable portable DVD player. The DVD player 1 is a shaft that can be raised and lowered so that a lid 4 having a liquid crystal display 3 disposed in a main body cabinet 2 can be opened at a required angle. The lid 5 has a built-in speaker 5.
[0012]
The main body cabinet 2 is composed of a lower half 2a as a cabinet chassis (mechanical deck chassis) and an upper half 2b joined to the upper side of the lower half 2a. A disk receiving recess 6 is formed on the upper surface side of the upper half 2b. A lid 7 that is formed and opens and closes the upper surface side of the disc housing recess 6 is attached. By closing the lid 7 on the upper surface side of the disc housing recess 6, the upper surface side of the upper half 2 b is flat. become.
[0013]
An operation key 8 and a lid opening button 9 are arranged on the upper surface side of the upper half 2b of the main body cabinet 2, and the front surface side is extended to the front edge portion on the bottom surface side of the lower half 2a, and each operation button 10, power button 11 and the display unit 12 are arranged, and the input / output jacks 13 are arranged across the side surfaces of the main body cabinet 2, that is, the side surfaces of the lower half 2a and the upper half 2b.
[0014]
In the main body cabinet 2, a circuit board 14 on which circuit components are mounted is arranged as shown in FIG. 2, and a disk device 15 for recording and / or reproducing an optical disk is built in.
[0015]
The disk device 15 includes a base chassis 16 formed in a substantially rectangular frame shape, and a turntable 17 that is driven to rotate by a spindle motor on one end side of the base chassis 16. The optical pickup device 18 is configured to be movable. This optical pickup device 18 records and / or reproduces an optical disk using a laser beam, and is orthogonal to the optical disk by a biaxial actuator with respect to the optical disk chucked on the turntable 17 and rotated. The laser beam emitted from the semiconductor laser is irradiated through an objective lens that is driven in a focusing direction that is parallel to the optical disk and in a tracking direction that is parallel to the optical disk. Driven in a radial direction with respect to the disk.
[0016]
The disk device 15 is attached to the inner surface side of the lower half 2a as a cabinet chassis and faces an opening 6b formed in the bottom surface portion 6a of the disk housing portion 6 of the upper half 2b.
[0017]
In order to incorporate and fix the disk device 15 in the main body cabinet 2, a damper effect is obtained by interposing a plurality (three in this example) of insulators 20 between the base chassis 16 and the lower half 2a as the cabinet chassis. Is given. Therefore, in order to attach the insulator 20 to the base chassis 16, as shown in FIGS. 2 to 4, as shown in FIGS. 2 to 4, mounting pieces 21 are projected horizontally at at least three locations on the peripheral surface. And it fits and attaches as shown in FIG.
[0018]
The insulator 20 is formed of rubber or a resin material having elasticity. As shown in FIG. 3, the insulator 20 is formed in a disk shape having a required thickness, and a fitting groove 20a is formed on the peripheral surface. Circular recesses 20b and 20c are formed, and arc-shaped deep grooves 20d and 20e are formed around the circular recesses 20b and 20c (see FIG. 6). On the other hand, the mounting piece 21 forms a fitting hole 21a having a diameter substantially the same as the diameter of the fitting groove 20a of the insulator 20, and forms an opening 21b having a required width from the front edge to the fitting hole 21a. The insulator 20 described above is attached to the attachment piece 21 by being press-fitted from the opening 21b in the fitting groove 20a and fitted into the fitting hole 21a.
[0019]
As shown in FIGS. 2 and 5, a positioning receiving portion 22 is provided on the lower half 2a as a cabinet chassis to which the insulator 20 attached to the base chassis 16 of the disk device 15 corresponds. The positioning receiving portion 22 is configured by forming ribs 22b that receive the insulator 20 radially at the base portion of the central shaft portion 22a that is inserted into the first circular recess 20c provided on the first surface of the insulator 20. . The rib 22b is, in this example, is formed four in four directions in a cross shape. On the other hand, on the inner surface side of the upper half 2b, as shown in FIG. 6, a pressing portion 23 is formed in a circular protrusion corresponding to the second circular recess 20b provided on the second surface opposite to the first surface of the insulator 20 . It is formed in a part shape.
[0020]
In order to incorporate and fix the disk device 15 in the main body cabinet 2 constructed in this way, as shown in FIG. 6, the lower half 2a as a cabinet chassis is provided with the insulator 20 attached to the base chassis 16 of the disk device 15. The first circular recess 20c is inserted into the center receiving portion 22a of the positioning receiving portion 22 provided on the lower end 2a in contact with the lower surface 2a on the cross-shaped rib 22b. The lower half 2a and the upper half 2b are united by fitting the presser portion 23 on the inner surface side to the second circular concave portion 20b of the insulator 20 in correspondence with the upper half 2b.
[0021]
As a result, the disk device 15 is fixed in the main body cabinet 2 with the insulator 20 held between the lower half 2a and the upper half 2b. That is, the disk device 15 is fixed via the insulator 20. In this state, the insulator 20 is received by being placed on the cross-shaped rib 22b of the positioning receiving portion 22 without the lower surface side front surface being in close contact with the lower half 2a side. The area becomes smaller.
[0022]
Accordingly, the insulator 20 is in a semi-fixed state with respect to the main body cabinet 2 and its restraint is moderately loosened, and the damper effect possessed by the insulator 20 itself is efficiently extracted, and the vibration resistance characteristics of the disk device 15 are improved.
[0023]
For the purpose of comparison, a vibration test is performed for comparison between a support fixing mechanism that supports and fixes the disk device 15 via the insulator 20 to the main body cabinet 2 in this embodiment configured as described above. Went.
[0024]
As shown in FIGS. 7 and 8, as a first test sample support and fixing mechanism, an insulator positioning receiving portion 32 provided in the cabinet chassis 31 has a central shaft portion 32 a erected on the cabinet chassis 31. A ring-shaped rubber spacer 32b is formed by adhering a rubber sheet to the cabinet chassis 31 in a ring shape surrounding the base portion of 32a through an adhesive paper 32c, and this is called a rubber spacer product.
[0025]
As shown in FIG. 9 and FIG. 10 as the second test sample support and fixing mechanism, the positioning receiving portion 42 of the insulator provided in the cabinet chassis 41 is integrated with the base portion of the central shaft portion 42 a erected on the cabinet chassis 41. A mounting portion 42b that is raised in a disk shape is formed, and this is referred to as a “cavity disk shape modified product”.
[0026]
The first and second test samples, the rubber spacer product and the cavity disk-shaped modified product, are prepared, and the disk device is supported and fixed to each through an insulator as in the case of this example shown in FIG. .
Then, while applying the tracking direction vibration and the focusing direction vibration to the disc, the rubber disc product that supports and fixes the disc device in this manner, the cavity disk modified product, and the present example product, respectively, reproduce the DVD disc and make it unreadable. Plot the resulting points.
[0027]
As a result of this vibration resistance test, the result shown in FIG. 11 was obtained for the vibration in the tracking direction, and the result shown in FIG. 12 was obtained for the vibration in the focus direction.
[0028]
From the above results, the positioning receiving portion of the insulator attached to the disk device is most ideal when the positioning receiving portion 22 of this example, that is, the rib 22b for receiving the insulator 20 is formed in a cross shape at the root of the central shaft portion 22a. It was confirmed that
[0029]
This is because, if the rubber spacer product shown in FIG. 7, that is, the insulator receiving portion of the positioning receiving portion 32 of the insulator is formed by the ring-shaped rubber spacer 32b, elastic deformation occurs more than necessary, and vibration is greatly increased. Thus, it is considered that the vibration resistance is lowered. In addition, when the cavity disk-shaped modified product shown in FIG. 8, that is, the insulator receiving portion of the positioning receiving portion 42 of the insulator is formed as a disk-shaped mounting portion 42b integrated with the central shaft portion 42a, the contact area with the insulator However, since the insulator is restrained more than necessary and the damper effect cannot be sufficiently exhibited, it is considered that the vibration resistance characteristic is lowered.
[0030]
The positioning receiving portion 22 of the insulator 20 attached to the disk device according to the embodiment of the present invention configured as described above has the ribs 22b formed radially at the base portion of the central shaft portion 22a in the form of four crosses. Without limitation, even if four or less three, four or more five, six, etc. are formed, the support effect of the insulator 20 substantially equivalent to the above-described cross-shaped rib 22b can be obtained. As shown in FIG. 13, in the positioning receiving portion 23 of the insulator, when three ribs 23b are formed radially on the central shaft portion 23a, one rib 23b is formed by casting or the like integrally with the cabinet chassis. If the ribs become chipped, the insulators cannot be received.
[0031]
Further, as shown in FIG. 14, in the positioning receiving portion 24 of the insulator, the number of ribs 22b formed radially on the central shaft portion 24a is five or six. The mold making costs are higher and the product is more expensive. Further, when a large number of ribs 22b are formed radially from the central shaft portion 22a, the receiving portion approaches a disk shape, and the contact area with the insulator becomes large, and the vibration resistance characteristics deteriorate.
[0032]
Further, in order to reduce the contact area with the insulator, as shown in FIG. 15, a positioning receiving portion 25 for the insulator in which a ring-shaped rib 25b that surrounds the base portion of the central shaft portion 25a and receives the insulator is also considered. In the case of this positioning receiving portion 25, the contact area with the insulator is reduced, and the vibration resistance is improved. However, the rib 25b is a continuous portion in the radial direction only by contacting the insulator in a circumferential shape. Therefore, the height may become unstable, and the stability of the support and fixing of the insulator is lacking.
[0033]
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, In the range which does not deviate from the meaning of this invention, it can change variously.
[0034]
That is, the specific shapes and structures of the respective parts shown in the above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention is thereby limited. Should not be interpreted in a limited way.
[0035]
The present invention is not limited to a DVD player. For example, in the above-described embodiment, an example of a recording and / or reproducing apparatus using an optical disk as an information recording medium has been described. It can be applied to one using a magnetic disk such as a hard disk or one using a magnetic tape.
[0036]
Furthermore, in the above embodiment, an example applied to a DVD player has been described. However, various electronic devices such as a portable device such as a video camera and a information device such as a handheld computer incorporating such a recording / reproducing device are described. Of course, it can be applied to equipment.
[0037]
【The invention's effect】
As described above, according to the disk device supporting and fixing mechanism of the present invention, the insulator that supports the disk device with respect to the mechanical deck chassis is not directly pressed against the surface of the mechanical deck chassis but is received by the radial receiving portion of the positioning receiving portion. The restraint is loosened moderately and the damper effect is pulled out, and the vibration resistance characteristics by the insulator of the disk device are improved.
[0038]
Accordingly, it is possible to record and / or reproduce an optical disk while receiving vibration, and a disk device for recording and / or reproducing an optical disk in a portable optical disk player or a vehicle such as an automobile subjected to vibration. It is advantageous in designing.
[0039]
In particular, the vibration-proof characteristics are further improved by forming the positioning receiving portion of the insulator with a substantially cross-shaped rib.
[Brief description of the drawings]
FIG. 1 is a perspective view of an example DVD player to which the present invention is applied.
2 is an exploded perspective view of a mounting portion on the cabinet chassis side of the disk device in the DVD player shown in FIG. 1. FIG.
3 is a perspective view showing a state in which an insulator of a support portion of the disk device shown in FIG. 2 is removed. FIG.
4 is a perspective view showing a state in which an insulator is attached to a support portion of the disk device in FIG. 3. FIG.
FIG. 5 is a perspective view of a positioning receiving portion on the cabinet chassis side.
FIG. 6 is a cross-sectional view of the support fixing portion in a state where the disk device is supported and fixed in the main body cabinet.
FIG. 7 is a perspective view of an insulator positioning receiving portion of a first comparative example.
8 is a cross-sectional view of the insulator positioning receiving portion shown in FIG.
FIG. 9 is a perspective view of an insulator positioning receiving portion of a second comparative example.
10 is a cross-sectional view of the insulator positioning receiving portion shown in FIG. 9. FIG.
FIG. 11 is a graph showing vibration resistance characteristics in a tracking direction.
FIG. 12 is a graph showing vibration resistance characteristics in a focus direction.
FIG. 13 is a perspective view of a first modified example of an insulator positioning receiving portion.
FIG. 14 is a perspective view of a second modification of the insulator positioning receiving portion.
FIG. 15 is a perspective view of a third modification of the insulator positioning receiving portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... DVD player, 2 ... Main body cabinet, 2a ... Lower half (cabinet chassis), 2b ... Upper half, 15 ... Disk device, 16 ... Base chassis, 17 ... Turntable, 18 ... Optical Pickup device, 20 ... Insulator, 21 ... Mounting piece, 22 ... Positioning receiving part, 22a ... Center shaft part, 22b ... Rib

Claims (4)

A support and fixing mechanism for a disk device that supports and fixes a disk device that records and / or reproduces to / from an optical disk using a laser beam to a mechanical deck chassis via an insulator,
Attach the required number of insulators to the base chassis of the disk unit,
The mechanical deck chassis is provided with a positioning receiving portion for positioning and supporting the insulator,
The insulator has a first recess provided in the center of the first surface and a second recess provided in the center of the second surface opposite to the first surface,
The positioning receiving portion has a central shaft portion fitted in the first recess of the insulator and a presser portion fitted in the second recess,
The receiving portion the insulator is supported radially formed from the central shaft,
A support and fixing mechanism for a disk device, wherein the insulator placed on the receiving portion is sandwiched between the central shaft portion and the pressing portion . The support / fixing mechanism of the disk device according to claim 1,
A support and fixing mechanism for a disk device, wherein a receiving portion for supporting the insulator of the positioning receiving portion provided in the mechanical deck chassis is formed by a radial rib. The support / fixing mechanism of the disk device according to claim 1,
A support and fixing mechanism for a disk device, wherein a receiving portion for supporting the insulator of the positioning receiving portion provided in the mechanical deck chassis is formed by a substantially cross-shaped rib. In the support fixing mechanism of the disk apparatus according to claim 1, 2, or 3,
A receiving and supporting portion for supporting the insulator is a support and fixing mechanism for a disk device formed by casting integrally with the mechanical deck chassis.

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