JPH0741796U - Disk device - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a disk device, and an object thereof is to improve the dustproof property of the head. [Structure] The chassis 40 of the mechanism assembly 21 includes rising walls 40b, 40c, 40d around a chassis body 40a.
And has a substantially container shape. Top plate portion 24a of the case 24
Abuts the rising wall portions 40b, 40c, 40d and covers the upper portion of the chassis body 40a. The space 60 is a closed space, and the optical head 42 is provided therein. The main circuit board assembly 22 includes a chassis 40
It is attached to the underside of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk device, and more particularly to a dustproof structure.

A CD-ROM device preferably has a dustproof structure.

It is desirable that the dustproof structure be a structure that takes into consideration the radiation of heat generated from the main circuit board assembly.

[0004]

[Prior art]

 FIG. 5 shows a conventional disk device 10.

In this optical disk device 10, a circuit board assembly 12 and a reproducing unit 13 are mounted on a chassis 11, and a disk tray 14 is provided so as to be slidable in the A ₁ and A ₂ directions. The case 15 having the top plate portion 15a and the side plate portion 15b covers the optical head 13 and the circuit board assembly 12 and is fixed to the chassis 11 by screws.

That is, the optical disk device 10 has a structure in which both the optical head 13 and the circuit board assembly 12 are hermetically sealed inside the device.

The optical head 13 is dustproof.

[0008]

[Problems to be solved by the device]

 In the above optical disk device 10, the circuit board assembly 12 is also hermetically sealed inside the device. Therefore, when the device 10 is used for a long time, the temperature inside the device is reduced by the heat generated by the circuit board assembly 12. It rises significantly.

Due to the heat generated inside the apparatus, an airflow is generated inside the apparatus, and the dust is drawn from the outside of the apparatus, so that the dust may adhere to the optical head.

Therefore, an object of the present invention is to provide a disk device that solves the above problems.

[0011]

[Means for Solving the Problems]

 According to a first aspect of the present invention, a chassis for supporting a head for reproducing a disk has a substantially container shape including a chassis main body and a rising wall portion along a peripheral edge of the chassis main body, and the case has the rising wall. And a circuit board assembly provided on the outside of the chassis while substantially abutting on the upper end of the chassis to cover the upper part of the chassis body.

[0012]

[Action]

 According to the structure of the first aspect of the present invention, the chassis has a substantially container shape, and the case covers the upper portion of the chassis main body.

The configuration in which the circuit board assembly is provided on the outside of the chassis acts so as not to prevent the heat generated in the circuit board assembly from being dissipated.

[0014]

【Example】

 FIG. 1 is an exploded view of a CD-ROM device 20 according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG. 1 of the assembled CD-ROM device 20, and FIG. 3 is a sectional view taken along line III-III in FIG.

In the CD-ROM device 20, generally, the mechanism assembly 21 is in the upper positional relationship and the main circuit board assembly 22 is in the lower positional relationship, and is screwed by the screw 23, and the case 24 is located above the mechanism assembly solid 21. It has a structure in which it is covered and screwed with a screw 25, and a bottom plate 26 covers a lower side of the main circuit board assembly 22 and is screwed with a screw 27.

Reference numeral 28 is a disc tray, and 29 is a front bezel.

Next, a main part of the present invention will be described.

Reference numeral 40 denotes a chassis, which has a substantially container shape.

The chassis 40 is a substantially rectangular plate-shaped chassis body 40, and when viewed from the front bezel 29 side of the CD-ROM device 20, the chassis 40 rises along the left side of the chassis body 40a and rises to the left side. Left rising wall 40b, right rising wall 40c rising along the right side of chassis body 40a, and rear rising wall rising along the inner side of chassis body 40a. And a portion 40d. The rising wall portions 40b, 40d, 40c are connected to each other and have a U-shape in a plan view. The upper end surfaces 40b-1, 40c-1, 40d-1 of the respective rising wall portions 40b, 40c, 40d are located on the same plane.

A rising wall portion is not formed on the side of the chassis main body 40 a on the front bezel side, and an opening 41 is formed.

Further, end faces 40a-2, 40b-2, 40c-2 are provided on the front bezel side of the chassis body 40a and the rising wall portions 40b, 40c.

Reference numeral 42 is an optical head, 43 is an optical head moving mechanism, 44 is a turntable, 45 is a turntable motor, and 46 is a tray moving mechanism, which is provided on the chassis body 40a. As shown together, it is housed in a container-shaped chassis 40.

The case 24 has a top plate portion 24a, left and right side plate portions 24b and 24c, a back plate portion 24d, and a front plate portion 24e. The front plate portion 24e is formed with an opening 24e-1 through which the tray passes.

On the lower surface of the top plate portion 24a, a sponge tape 47 is attached in a U-shape corresponding to the rising wall portions 40b, 40c and 40d of the chassis 40.

A frame 49 made of sponge is attached to the inner surface of the front plate 24e so as to surround the opening 24e-1.

As shown in FIGS. 2 and 3, the chassis 40 and the case 24 include the upper end surfaces 40b-1, 40c-1, 40d-1 of the rising wall portions 40b, 40c, 40d and the top plate portion 24a. And the end faces 40a-2, 40b-2, 40c-2 of the chassis body 40a and the rising wall portions 40b, 40c, and the front plate portion 24e between the front surface portion 24e. The frame 48 made of sponge is sandwiched between and fixed in a pressed state.

The top plate portion 24a covers an upper portion of the chassis body portion 40a.

The opening 29 a of the front bezel 29 is closed by the front decorative plate portion 28 a of the tray 28.

As a result, the space 60 inside the container-shaped chassis 40 is hermetically sealed and has a dust-proof structure, and the optical head 42 and the like in the chassis 40 are dust-proof.

Here, the sponge tape 47 and the frame 48 made of sponge function as a seal member, and the dustproof property with respect to the inside of the chassis 40 is high.

Further, when the tray 28 is pulled into the CD-ROM device 20, as shown in FIG. 2, the front decorative plate 28 a of the tray 28 has a sponge frame 49 between which the front plate portion is sandwiched. It hits 24e.

As a result, the portion of the opening 24e-1 is also reliably sealed, and the dustproof property inside the container-shaped chassis 40 is further enhanced.

Further, the electrical connection between the mechanism assembly 21 and the main circuit board assembly 22 is made by a connector 50 which is attached to the chassis 40 so as to project below the chassis body 40a.

A portion of the chassis main body 40 a of the chassis 40 to which the connector 50 is attached is closed by a mounting substrate of the connector 50 or the like.

From this point as well, the space 60 inside the mechanism assembly 21 is sealed.

The inventor left the CD-ROM device 20 of the present embodiment and the conventional optical disk device 10 shown in FIG. 5 in the same ring in which dust is floating, and lowers the reproduction level. When the degree of dust adhering to the optical head was observed, it was found that the CD-ROM device 20 of the present embodiment is about 4 to 5 times more dust-proof than the conventional optical disc device 10. .

Reference numeral 51 denotes a disk, which is mounted on the turntable 44 in the sealed space 60, is rotated by the motor 45, and is reproduced by the optical head 42.

Next, the heat dissipation of the main circuit board assembly 22 will be described with reference to FIGS. 1 to 3.

The main circuit board assembly 22 is provided on the lower side of the chassis 40, slightly apart from the chassis 40, and is housed in a space 70 formed by the case 24 and the bottom plate 26.

Here, the case 24 has a plurality of small openings 24f in the portion between the top plate portion 24a and the side plate portions 24b and 24c, and near the lower ends of the side plate portions 24b and 24c. Also has a plurality of openings 24g.

Therefore, the space 70 has a large number of ventilation holes.

Therefore, the heat generated in the main circuit board assembly 22 is released to the outside of the CD-ROM device 20 through the openings 24f and 24g and is radiated.

As a result, even when the CD-ROM device 20 is continuously used for a long time and the main circuit board assembly 22 generates a large amount of heat, the mechanism assembly 21 is affected by the heat. Continue to operate normally without.

FIG. 4 shows a modification of the CD-ROM device of the present invention.

The CD-ROM device 20A has a case 24A.

The top plate portion 24Aa of the case 24A has two protrusions 80, 81 and two protrusions 80, 81 protruding inside the case 24A at the location of the sponge tape 47 in FIG. It has a groove 82 therebetween.

The sponge tape 47 in FIG. 1 is not attached.

The upper ends of the rising wall portions 40b, 40c, 40d are fitted into the groove 81, and the space between the rising wall portions 40b, 40c, 40d and the top plate portion 24Aa is sealed.

The present invention can be applied not only to the CD-ROM device but also to a CD device, an optical disk device, a magneto-optical disk device, or a magnetic disk device, or a device for mounting a cartridge containing a disk.

[0051]

[Effect of device]

 As described above, the present invention has the following features.

The inside of the chassis may be hermetically sealed, and the head that supports the head for reproducing the disc may be protected from dust. As a result, it is possible to effectively prevent dust from adhering to the head and deteriorating the performance.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a disk device of the present invention.

FIG. 2 is a cross-sectional view of the assembled disc device taken along the line II-II in FIG.

FIG. 3 is a sectional view of the assembled disk device shown in FIG.
FIG. 3 is a sectional view taken along the line III.

FIG. 4 is a view showing a modified example of the present invention.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

20 CD-ROM device 21 Mechanism assembly 22 Main circuit board assembly 24 Case 24a Top plate part 24b, 24c Side plate part 24d Back plate part 24e Front plate part 24f, 24g Opening 26 Bottom plate 28 Disc tray 29 Front bezel 40 Chassis 40a Chassis body 40b, 40c, 40d Standing wall portion 40b-1, 40c-1, 40d-1 Upper end surface 40a-2, 40b-2, 40c-2 Front bezel side end surface 41 Opening 42 Optical head 43 Optical head moving mechanism 44 turntable 45 turntable motor 46 tray moving mechanism 47 sponge tape 48, 49 sponge frame 50 connector 51 disk 60 space inside chassis 70 space formed by case and bottom plate 80, 81 ridge 82 groove

Claims (1)

[Scope of utility model registration request] 1. A chassis for supporting a head for reproducing a disc is formed into a substantially container shape including a chassis body and a rising wall portion along the peripheral edge of the chassis body, and the case has the rising wall portion. A disk device characterized in that the circuit board assembly is provided on the outside of the chassis by substantially abutting on the upper end of the chassis body to cover the chassis body.