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Pick-up device

A pick-up device and communication hole technology, applied in the direction of protecting the transducing head, optical recording head, reducing the physical parameters of the carrier, etc., can solve the problem of insufficient heat dissipation, etc.

Inactive Publication Date: 2007-04-25
PIONEER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For such a laser light source that generates a lot of heat, it is not enough to rely solely on the heat dissipation plate to dissipate heat.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment

[0023] Fig. 1 is an exploded perspective view of a disc device having a pickup device according to a first embodiment of the present invention, and reproducing information recorded on or recording information on an optical disc such as a DVD or a CD.

[0024] This disc device 1 is constituted by: having an outer case 21, an inner case 25 provided inside the outer case 21, a disc holder 29 for placing an optical disc 41 as an optical recording medium, which can advance and retreat on the inner case 25, The main body 32 for reproducing or recording information on the optical disc 41 and the circuit board 40 having electronic components for controlling the operation of the main body 32 are provided in the inner case 25 .

[0025] The outer casing 21 is constituted as follows: an upper casing 22 with openings on the lower side and the front side in FIG. It is a flat cuboid shape.

[0026] The inner case 25 has a bottom surface 26 having a hole 261 in the approximate center and a ...

no. 2 Embodiment

[0070] A second embodiment of the present invention is shown in FIG. 4 . Although the basic configuration of the second embodiment is the same as that of the first embodiment, the difference between the second embodiment and the first embodiment lies in that the heat radiation passage 81 as a heat radiation mechanism is provided coaxially with the communicating hole 55 interposed therebetween. two.

[0071] That is, as the heat dissipation passage 81 , a first heat dissipation passage 811 provided through the upper wall surface of the communication hole 55 and a second heat dissipation passage 812 provided through the lower wall surface of the communication hole 55 are provided. The mutual central axes of the first heat dissipation passage 811 and the second heat dissipation passage 812 are substantially on the same straight line.

[0072] According to this constitution, in addition to the effects (1) to (7) of the first embodiment described above, the following effects can b...

no. 3 Embodiment

[0077] A third embodiment of the present invention is shown in FIG. 5 . Although the basic structure of the third embodiment is the same as that of the first embodiment, the difference between the third embodiment and the first embodiment is that an air flow receiving member 84 is provided on the heat radiation passage 81 as a heat radiation mechanism.

[0078] That is, an airflow receiving member 84 having a wall surface facing the airflow generated by the rotation of the optical disc 41 is provided on the edge of the outer opening 82 of the heat dissipation path 81 .

[0079] The wall surface facing the air flow is a plane, and is parallel to the axis of the heat dissipation path 81 .

[0080] The airflow receiving member 84 is integrally formed upright from the pick-up base 51 .

[0081] According to this constitution, in addition to the effects (1) to (7) of the foregoing embodiments, the following effects can be obtained.

[0082] (9) An air flow receiving member 84 hav...

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PUM

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Abstract

A communication hole 55 is provided at a pickup base 51. A laser light source body 61 is disposed on one side of the communication hole 55. A grating 71 is disposed on the other side of the communication hole 55. A radiation path 81 through which the inner part of the communication hole 55 communicates with the outer part of the pickup base 51 is provided at the communication hole 55. Heat emitted from the laser light source body 61 is radiated through the radiation path 81.

Description

technical field [0001] The present invention relates to pick-up devices. For example, it is related with the pickup apparatus which writes or reads information to an optical recording medium. Background technique [0002] A pickup device for writing or picking up information to or from an optical recording medium such as a DVD (Digital Versatile Disc) or a CD (Compact Disc) is known. [0003] This pick-up device is constituted as: have the laser light source body that irradiates the light beam on the optical disk as the light source, the grating as the optical element that is arranged in the middle of the optical path from the laser light source body to the optical disc, and the laser light source body and the grating. The pick-up seat of the configured shell. [0004] On the pick-up seat, a communication hole is provided. One side of the communication hole has a light source body installation part for installing a laser light source body, and the other side has an optical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/12G11B33/14G11B7/121
CPCG11B7/121G11B7/12
Inventor 村田将也水内雄一小山雅之林武彦岩野毅
Owner PIONEER CORP
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