JP3031211B2 - Vibration resistant optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device having a vibration-proof structure which has improved vibration-proof characteristics of an optical disk device for recording and reproducing data on and from a disk-shaped recording medium housed in a cabinet with built-in speakers.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of preventing tracing errors of an optical pickup due to disturbance vibration such as loud sound, the optical disk device is required to have vibration resistance as an important technology as basic performance. Hereinafter, a conventional optical disk device will be described. FIG. 8 shows an optical disk device housed in a conventional cabinet with a built-in speaker. In FIG. 8, 101 is a cabinet. An optical disk device 102 is provided in the center of the cabinet and plays back an optical disk. An amplifier 103 having a large output amplifies a signal from the optical disk device 102. Reference numeral 104 denotes a speaker fixed to the cabinet, which emits a reproduction signal as sound. FIG.
Reference numeral 101 denotes an anti-vibration structure optical disk device. Reference numeral 101a denotes a shelf plate which is a part of a cabinet, and is a mounting base of the optical disk device. Reference numeral 105 denotes an anti-vibration member, which is fixed to the shelf board 101a and blocks vibration transmitted directly from the cabinet 101. The anti-vibration member 105 includes a housing 105a fixed to the shelf board 101a, a spring 105b disposed substantially concentrically with the housing 105a, and a rubber molded product 10a.
5c. Reference numeral 106 denotes an outer cover that is an outer shell on the left, right, and upper surfaces, and 107 denotes a chassis that is an outer shell component on the lower surface, on which core components and electronic circuit components (not shown) are mounted. Reference numeral 108 denotes a rear plate, which is a rear shell component.
The outer cover 106, chassis 107, and rear plate 108 are fixed by screws. FIG. 11 shows an assembled state of the vibration isolating member 105. FIG. 10 is a view showing basic components of the optical disk device. Reference numeral 109 denotes an optical disk on which information is recorded. Reference numeral 110 denotes a spindle motor unit that rotates the optical disk 109 at a controlled rotation speed. Reference numeral 111 denotes a clamper for holding the optical disc 109, which is disposed substantially concentrically with the spindle motor 110. Reference numeral 112 denotes an optical pickup for reading a signal recorded on the optical disk 109, which is movable in a radial direction of the optical disk 109.

The operation of the optical disk device configured as described above will be described below. As you know,
2. Description of the Related Art An optical disc apparatus reproduces an optical disc and outputs loud sound from a speaker through an amplifier through an amplifier, so that music, karaoke, and the like can be enjoyed.

[0004]

However, in the above-described conventional configuration, vibration directly transmitted from the installation surface of the optical disk device is attenuated by the vibration isolator, but the back pressure of the speaker from around the optical disk device is reduced. As a result, the outer parts of the optical disk device resonate, so that the vibration of the outer parts is propagated to the disk, and there is a problem that a trace mistake of the optical pickup occurs.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an anti-vibration structure optical disk apparatus which eliminates influence on cabinet resonance and sound pressure due to back pressure from a speaker and prevents erroneous tracing of an optical pickup. Aim.

[0006]

In order to achieve this object, an anti-vibration optical disk apparatus according to the present invention comprises a cabinet having a speaker, and information stored or stored in the cabinet and recorded on a disk-shaped recording medium. A reproducible optical disk device, the left and right sides of the optical disk device
And a plurality of open holes in an outer part on the upper surface , and is configured on an anti-vibration member for attenuating vibration from the optical disk device installation surface of the cabinet, particularly between outer parts. Has a hole around the fixed part, and a plurality of open holes opened in the outer part, with respect to one surface,
It has a configuration characterized by being entirely opened.

[0007]

According to this configuration, the sound pressure applied to the outer parts of the optical disk device from the cabinet by the back pressure of the speaker is released by opening the outer parts of the optical part to release the sound pressure, thereby reducing the sound pressure that resonates the outer parts. By alleviating this, it is possible to prevent the transmission of vibrations from the outer components to the core components of the optical disk device, and to eliminate trace errors of the optical pickup.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an optical disk apparatus having a vibration-proof structure according to the first embodiment. FIG. 2 shows an optical disk device housed in a cabinet with built-in speakers according to the first embodiment. In FIG. 2A, reference numeral 1 denotes a cabinet. Reference numeral 2 denotes an optical disk device disposed in the center of the cabinet, which reproduces an optical disk. Reference numeral 3 denotes an amplifier having a large output, and amplifies a signal from the optical disk device 2. Reference numeral 4 denotes a speaker fixed to the cabinet, which emits a reproduced signal as sound. In FIG. 2B, reference numeral 1a denotes a shelf plate which is a part of a cabinet, and is a table on which the optical disk device 2 is provided. Reference numeral 5 denotes an anti-vibration member that is fixed to the shelf 1a and blocks vibration transmitted directly from the cabinet 1. The anti-vibration member 5 includes a housing 5a fixed to the shelf 1a and a spring 5 disposed substantially concentrically with the housing 5a.
b and a rubber molded product 5c. In FIG. 1, reference numeral 6 denotes an outer cover which is an outer component, which is an outer cover on the left, right, and upper surfaces of an optical disk device main body (not shown) including a main component of the optical disk device described later, and is enlarged to a portion A in FIG. A chassis 7 having an open hole 6a as shown in FIG. Reference numeral 8 denotes a rear plate, which is a rear shell component. The exterior cover 6, the chassis 7, and the rear plate 8 are fixed to each other with screws. FIG. 3 is a diagram showing the main components of the optical disk device, 9 is an optical disk on which information is recorded, 1
Reference numeral 0 denotes a spindle motor unit that rotates the optical disk 9 at a controlled rotation speed, and is fixed to the chassis 7. Reference numeral 11 denotes a clamper for holding the optical disk 9, which is disposed substantially concentrically with the spindle motor 10. Reference numeral 12 denotes an optical pickup for reading a signal recorded on the optical disk 9, which is movable in the radial direction of the optical disk 9. FIG. 4 shows the cabinet 1, the optical disk device 2, and the amplifier 3 described above in the side sectional view of FIG.

The operation of the optical disk apparatus having the vibration-proof structure configured as described above will be described with reference to FIGS. First, the cabinet 1 resonates due to the back pressure of the speaker 4 fixed to the cabinet 1 and is transmitted to the shelf 1a. However, the vibration is attenuated by the vibration isolator 5 and the optical disk 9 is transmitted through the chassis 7 and the spindle motor unit 10. In addition, the vibration transmitted to the optical pickup unit 12 is reduced to a minute amount. In addition, the sound pressure from the periphery of the optical disk device 2 is applied only to the portion where the opening 6a is not opened, and the sound pressure is not applied to the opening 6a provided in the outer cover 6; The resonance of the device 2 is reduced.

FIG. 5 shows the vibration characteristics of the vibration-resistant optical disk device according to this embodiment and the vibration characteristics of the conventional optical disk device.
This is shown in comparison with FIG. FIG. 5 shows the exterior covers 6 and 13.
The vibration of the upper surface is measured and compared. The horizontal axis indicates frequency, and the vertical axis indicates the amount of vibration. A shows the characteristics of the conventional optical disk device, and B shows the characteristics of the vibration-proof optical disk device of the present embodiment. The P portion is an improved portion, and the Q portion is a deteriorated portion.

FIG. 6 shows the results of measurement and comparison of the vibration on the optical disk 9. As shown in FIG. 5, the horizontal axis shows the frequency, the vertical axis shows the vibration amount, A shows the characteristics of the conventional optical disk device, and B shows the present embodiment. The characteristics of the example are shown. Part P is an improved part. Comparing the above characteristics, the vibration transmitted to the disk 9 is also reduced because the vibration on the outer cover 6 is reduced.

As apparent from FIGS. 5 and 6, the vibration-resistant optical disk device according to the present embodiment has an excellent effect in terms of vibration transmission attenuation. In our experiments, it is more effective for the open pores to be uniformly dispersed on one surface without being partially concentrated, and the effect is effective if the open porosity is at least 10% of the surface area of the surface. It turned out to be.

As described above, according to the first embodiment of the present invention, the outer member of the optical disk device has a plurality of open holes, and the vibration isolator for attenuating the vibration from the installation surface of the optical disk device is provided. By providing, the sound pressure from the periphery of the optical disc device, sound pressure is applied only to the portion where the open hole is not opened, because the sound pressure is not applied to the open holes provided in the left , right, and upper exterior covers, resonance of the optical disk apparatus is alleviated transmitted and cabinet resonance by back pressure of the speaker, and by shelf plate resonator is also the vibration damping by the vibration isolator, the optical disk and the optical pickup unit via the chassis spin de Rumota unit The resulting vibration is reduced to a very small amount, and a trace error of the optical pickup can be prevented.

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a perspective view of an outer part of an optical disk apparatus having a vibration-proof structure according to a second embodiment of the present invention. In FIG. 7, reference numeral 7 denotes a chassis which is an outer part on the lower surface, on which a spindle motor unit is fixed and an optical pickup unit is mounted. Reference numeral 13 denotes an outer cover which is an outer part on the left, right, and upper surfaces, and a plurality of holes 13b are provided around a fixing portion 13c with the chassis 7. Numeral 8 denotes a rear plate, which is a shell component on the rear surface, and is fixed by screws. The difference from the configuration of the first embodiment shown in FIG.
The point is that a plurality of holes 13b are opened around the fixing portion 13c of the exterior cover 13 with the chassis 7 to cut off the transmission of vibration.

The operation of the anti-vibration optical disk device configured as described above will be described. Similarly to the first embodiment, the sound pressure from the periphery of the optical disk device is applied to the outer parts of the optical disk device, and the outer cover 13 resonates, but is provided around the fixing portion 13c of the outer cover 13 with the chassis. Vibration is attenuated by the hole 13b, and vibration is transmitted only between the fixed portions, so that the resonance of the optical disk device can be reduced.

As described above, according to the second embodiment of the present invention, the outer component of the optical disk device has a plurality of holes, and the vibration isolating member for attenuating the vibration from the installation surface of the optical disk device is provided. In addition, by providing a hole around the fixed part between the outer parts, the resonance of the outer part is attenuated by the hole around the fixed part, so that the resonance is transmitted to the optical disk and the optical pickup unit via the chassis spindle motor unit. Vibration is further reduced, and tracing errors of the optical pickup can be more effectively prevented.

[0017]

As described above, the present invention relates to a cabinet having a speaker and an optical disk device housed in the cabinet and capable of recording information on a disk-shaped recording medium or reproducing the recorded information. Left and right
And a plurality of open holes in an outer part on the upper surface , and is configured on an anti-vibration member for attenuating vibration from the optical disk device installation surface of the cabinet, particularly between outer parts. Has a hole around the fixed part, and a plurality of open holes opened in the outer part, with respect to one surface,
By being opened as a whole, it is possible to realize an excellent anti-vibration structure optical disk device capable of preventing a trace error of the optical pickup even with a back pressure at the time of a large output from a speaker.

[Brief description of the drawings]

FIG. 1 is a diagram showing an optical disk apparatus having a vibration-proof structure according to a first embodiment of the present invention.

FIG. 2 (a) is a view showing an optical disc device housed in a cabinet with a built-in speaker; FIG. 2 (b) is a cross-sectional view of an anti-vibration member;

FIG. 3 is a diagram showing essential parts of the optical disc apparatus.

FIG. 4 is an explanatory view of an action of the vibration-proof structure.

FIG. 5 is a characteristic evaluation diagram obtained by measuring vibration on the outer cover.

FIG. 6 is a characteristic evaluation diagram obtained by measuring the vibration on the optical disk.

FIG. 7 is a diagram showing an optical disk apparatus having a vibration-proof structure according to a second embodiment of the present invention.

FIG. 8 is a diagram showing an optical disk device housed in a conventional cabinet with a built-in speaker.

FIG. 9 is a diagram showing a conventional optical disk device.

FIG. 10 is a view showing a main component of the same.

FIG. 11 is a view showing a state where the vibration isolating member is assembled.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabinet 2 Optical disk drive 4 Speaker 5 Vibration isolation member 5a Housing 5b spring 5c Rubber molded product 6 Exterior cover 6a Open hole 13 Exterior cover 13a Open hole 13b hole 13c Fixed part

Continuation of the front page (56) References JP-A-9-17174 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 33/08 G11B 33/12 309

Claims (4)

(57) [Claims] 1. A cabinet having a speaker, and an optical disk device housed in the cabinet and capable of recording information on a disk-shaped recording medium or reproducing information recorded on the disk-shaped recording medium, wherein outer right and left and upper surface parts of the optical disk device are provided. A plurality of open holes on a vibration-absorbing member for attenuating vibration from an optical disk device installation surface of the cabinet. 2. The vibration-resistant optical disk device according to claim 1, wherein a hole is provided around a fixing portion between the outer components. 3. The anti-vibration optical disk device according to claim 1, wherein the plurality of open holes formed in the outer component are entirely formed on one surface. 4. The optical disk apparatus according to claim 1, wherein the total open hole area of at least one surface has an aperture ratio of at least 10% of the surface area of the surface.