CN2401966Y - Pressure difference balance tray for compact disc driver - Google Patents

Abstract

The utility model relates to a differential pressure balancing tray for an optical disk driver, which is arranged in the optical disk driver. The utility model comprises a driving device, a rotating seat and a sliding read-write head, wherein a tray is arranged on the rotating seat; a circular groove is arranged on the tray for installing optical discs; the tray is provided with a rectangular slot, and the sliding read-write head can slide along the rectangular slot. At least one air slot is positioned at the circumference edge of the circular groove on the tray, and thus the upper margin surface and the bottom margin surface of the circular groove are in an intercommunicating state. The utility model can eliminate differential pressure caused by air flow and reduce shock when the optical discs rotate to improve read-write accuracy.

Description

The pressure balance pallet of CD drive

The pressure balance pallet of the utility model relevant a kind of CD drive, particularly a kind of CD drive.

CD drive is one of outfit important on the computer, can read (CD-ROM and DVD), reads (CD-R), reads to smear and write (CD-RW) various picture and text, audio and video data in CD, for traditional disk drive hardly matches.

Information industry is fast-developing, CD-ROM driver from early stage low speed reading rate, to full-fledged and commercial 40 times even now up to the high-speed light disk drive of 50 times of reading rates, and, existing cd-rewritable driver up to the octuple writing rate etc., just replace old commodity with surprising renewal speed, especially, under the high data transmission speed and high frequency range requirement condition of multimedia computer, the standard that the two-forty CD drive has become on PC, household PC and the network workstation is equipped with.

The accuracy of data reading-writing also is the important indicator of high-speed light disk drive quality.The modal puzzlement of two-forty CD drive, the for example vibrations that when motor drives the CD rotation, generated, and, because of pressure reduction that high speed rotary motion generated vibrations or the like, stable equilibrium's property reduction when CD is rotatablely moved, significantly influence the precision that reads of read/write head, can therefore cause write error can writing on the formula CD drive also, it is all that this is all because of the puzzlement that caused of vibrations, the particularly optical disk high-speed pressure reduction vibrations that rotatablely move and produced, all fail so far effectively to solve, become the two-forty CD drive and manufacture the bottleneck that is difficult to break through, also therefore-and vibrations and uneven problem of rotating, slowed down the more sustainable development of all kinds of CD drive of high power speed.

In view of this problem is demanded urgently improving, and the purpose of this utility model is to provide a kind of can significantly reduce vibrations, promotes the pressure balance pallet of the CD drive of read-write degree of accuracy.

The technical solution of the utility model is to provide a kind of pressure balance pallet of CD drive, be arranged on the inside of CD drive, this CD drive comprises the swivel base of drive unit, driven device driven in rotation, the read/write head of slippage, pallet is set on swivel base, be provided with a circular groove for installing CD in pallet, be provided with a rectangular channel in this pallet, the read/write head that supplies slip is characterized in that along this rectangular channel sliding motion:

Be positioned at the circumferential edge of circular groove on this pallet, be provided with at least one air drain, making the upper limb face of this circular groove and root edge face is the intercommunication state.

The pressure balance pallet of CD drive of the present utility model, utilize most the air drains that are arranged at respectively on the pallet, between conducting pallet upper limb face and the root edge face, form the pressure balance device on this pallet, when optical disk high-speed rotatablely moves, this pressure balance device of mat can be eliminated the pressure differential that space, pallet upper and lower part air-flow difference causes, and makes CD in the rotation reach the effect of self-poise rotational gravity, makes the CD drive read head can the more stable action of accurately doing read-write.And this CD drive pressure balance pallet is positioned at the air drain amorphism specification on the pallet and the restriction of quantity, does not change support holder structure in the manufacturing, does not increase part and cost, but has a function of damping and balance rotating gravity, meets industrial requirement.

Following conjunction with figs. describes architectural feature of the present utility model and purpose in detail.

Description of drawings:

Fig. 1 is the stereographic map of the utility model CD drive;

Fig. 2 is the utility model pressure balance pallet stereographic map;

Fig. 3 is the utility model pressure balance pallet top view.

As shown in Figure 1, the pressure balance pallet 20 of CD drive of the present utility model is arranged at CD drive 10 inside, is used to lift the CD of inserting in the CD drive.

As shown in FIG., aforementioned lights disk drive 10 comprises by drive unit 12, transposase 11 3, and read/write head 14 basic components such as grade of slip, common combination is in body 11.Wherein, but these transposase 11 3 driven devices 12 driven in rotation use driving the CD be positioned on the pallet 20, read while write data by read/write head 14 sliding motions again.

And for example Fig. 2 and Fig. 3, this pallet 20, be included in card and be provided with a circular groove 21, for installing CD, be provided with a rectangular channel 22 in this pallet 20 in addition, can be for the read/write head 14 of body slip, along these rectangular channel 22 sliding motions, to make read-write motion corresponding to optical disc surface, be positioned at the circumferential edge of this circular groove 21 on the pallet 20, be provided with most air drains 23,24,25, mat respectively this air drain 23,24,25 to make the upper limb face of circular groove 21 and root edge face be the intercommunication state, and the pressure balance device on the formation pallet 20.

Aforesaid the utility model, control CD drive 10 is opened pallet 20, inserts CD in circular groove 21, and this CD can drive through transposase 11 3 by driven device 12, and makes high speed rotary motion in circular groove 21; At this moment, the read/write head 14 of slip can be along rectangular channel 22 sliding motions of pallet 20, optical disc surface is done the action of read-write.

When CD under the high speed rotating state, because of the pressure balance device on the aforementioned pallet 20 makes circular groove 21 upper and lower ends is the intercommunication state, the pressure differential that can eliminate pallet 20 upper and lower space air-flows differences and generate, make the CD vibrations in the rotation be reduced to minimum level, significantly promote the read-write degree of accuracy.

The utility model shown in Fig. 2,3, each air drain 23,24,25 on its pressure balance pallet 20 is one of enforceable illustration of the utility model; In the practical application, the air drain on the utility model pressure balance pallet 20 can not limit its shape specification and quantity, all can reach identical function.

On reality was made, the utility model pressure balance pallet 20 did not change one-piece construction, does not increase part and manufacturing cost, but has the effect of damping and balance rotating gravity, meets industrial requirement.

Therefore, as implied above the utlity model has on most air drain conducting circular grooves, the optical disc tray of lower end, form CD drive pressure balance pallet, can significantly reduce the amplitude of vibration of the generation of uneven air pressure, especially with wherein, utilize easy structure and simple and easy processing, CD is installed in the pallet with pressure balance device, high speed rotating can cause unusual vibrations under also, particularly for the amplitude of vibration that is generated because of the high speed rotating draught head, the utility model has the significant effect of improving especially, makes CD drive more stably rotate driving, and makes the signal read-write more accurate.

Claims (1)

1, a kind of pressure balance pallet of CD drive, be arranged on the inside of CD drive, this CD drive comprises the swivel base of drive unit, driven device driven in rotation, the read/write head of slippage, pallet is set on swivel base, be provided with a circular groove for installing CD in pallet, be provided with a rectangular channel in this pallet, the read/write head that supplies slip is characterized in that along this rectangular channel sliding motion:

Be positioned at the circumferential edge of circular groove on this pallet, be provided with at least one air drain, making the upper limb face of this circular groove and root edge face is the intercommunication state.

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