CN1746987A - optical drive - Google Patents

Abstract

An optical drive comprises an optical module including a spindle motor base plate, a spindle motor, a main guide rod and an optical read-write head. The main shaft motor and the main guide rod are both arranged on the main shaft motor bottom plate. The optical read-write head is arranged on the main guide rod in a mode of moving along the axial direction of the main guide rod.

Description

optical drive

technical field

The invention relates to an optical drive, and in particular to an optical machine module of the optical drive.

Background technique

The hardware structure of the optical drive can be mainly divided into two parts: the optical-mechanical module (Mecha) and the electronic control module. The main function of the optical-mechanical module is to rotate the optical disc and generate light spots to access the data on the optical disc. The components of the optomechanical module include the spindle motor (Spindle Motor) used to drive the optical disc to rotate and the optical pickup head (Optical Pickup Head) used to generate light spots to access the data on the optical disc.

Please refer to Figure 1 and Figure 2 at the same time. FIG. 1 is an exploded schematic view showing a traditional optical-mechanical module in an optical drive, and FIG. 2 is a combined diagram showing the optical-mechanical module in FIG. 1 . A traditional optical-mechanical module 100 in an optical drive mainly includes a bracket 102 , a spindle motor bottom plate 104 , a spindle motor 106 , a main stem 108 and an optical read-write head 110 .

The first guiding rod base 112 a and the second guiding rod base 112 b are respectively locked on two sides of the bracket 102 by a first locking screw 114 a and a second locking screw 114 b. The leading rod 108 is disposed on the bracket 102 by accommodating and fixing the first rod end 116 a and the second rod end 116 b of the leading rod 108 by the first leading rod base 112 a and the second guiding rod base 112 b respectively.

The optical read-write head 110 is disposed on the main rod 108 in a manner that can move along the axial direction of the main rod 108 . For example, the main rod 108 is sleeved with the sleeve 118 fixedly connected with the optical read-write head 110 , so that the optical read-write head 110 can move along the axial direction of the main rod 108 through the sleeve 118 . In addition, a secondary guide rod 120 is disposed on the bracket 102 , and the secondary guide rod 120 is used to support the moving optical pick-up head 110 so that the optical pick-up head 110 can stably access the optical disc driven by the spindle motor 106 .

On the other hand, the spindle motor bottom plate 104 is locked on the bracket 102 through the first locking component set 122 a and the second locking component set 122 b. Furthermore, the spindle motor 106 is disposed on the spindle motor base plate 104 .

Generally speaking, the disc recognition ability of the optical drive module of the optical drive is usually an important indicator to measure the quality of an optical drive. As shown in FIG. 2 , the distance Y1 from the rotation center of the spindle motor 106 to the shaft center of the main rod 108 is a key factor affecting the ability of the optical-mechanical module 100 to access optical discs, especially the ability to identify eccentric optical discs.

In the above-mentioned conventional optomechanical module 100, due to the gap between the spindle motor base plate 104 and the bracket 102, between the spindle motor 106 and the spindle motor base plate 104, and the first leading rod base 112a, the second leading rod base 112b There are assembly tolerances between the bracket 102 and between the leading rod 108 and the first leading rod base 112a and the second leading rod base 112b. Moreover, the above-mentioned components themselves also have their own manufacturing tolerances.

Therefore, for the distance Y1 from the rotation center of the spindle motor 106 to the axis center of the capstan 108 , there will be a considerable tolerance accumulated. This will cause Y1 to deviate greatly from the design value, resulting in insufficient ability of the optical-mechanical module 100 to access the optical disc, and thus the quality of the optical drive cannot be improved.

Contents of the invention

Therefore, the object of the present invention is to provide an optical-mechanical module for an optical drive, in which the distance from the rotation center of the spindle motor in the optical-mechanical module to the axis of the main rod is more in line with the design value, so as to improve the optical-mechanical module’s storage of optical discs. The ability to extract, thereby greatly improving the quality of the optical drive.

According to the above purpose, the present invention proposes an optical-mechanical module (Mecha) of an optical drive, which includes a spindle motor base plate, a spindle motor, a main rod, and an optical read-write head. Both the spindle motor and the leading rod are arranged on the spindle motor bottom plate. The optical read-write head is arranged on the main rod in a manner that can move along the axial direction of the main rod. The optomechanical module of the present invention may further include a mounting plate, on which the spindle motor bottom plate is disposed.

Moreover, in the optical-mechanical module of the present invention, the main rod has a first rod end and a second rod end, and the spindle motor bottom plate may include a first bearing part and a second bearing part. The first bearing part and the second bearing part are opposite to the first rod end and the second rod end respectively, and the first bearing part has a first concave part, and the second bearing part has a second concave part. The first recessed portion and the second recessed portion are respectively used for accommodating and fixing the first rod end and the second rod end, so that the main rod is disposed on the main shaft motor base plate.

In the above-mentioned optical-mechanical module of the present invention, the first bearing part and the second bearing part can be a first pair of protrusions and a second pair of protrusions respectively, or can also be a first supporting pad and a second supporting pad respectively. Bearing cushions. The pair of first bumps and the pair of second bumps can be integrally formed on the spindle motor base plate respectively. In addition, the first backing pad and the second backing pad can be integrally formed respectively. Alternatively, the first support pad and the second support pad can be respectively formed on the bottom plate of the spindle motor by injection molding.

In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

FIG. 1 is an exploded view showing a conventional optical-mechanical module in an optical drive.

FIG. 2 is an assembly diagram showing the optical-mechanical module of FIG. 1 .

FIG. 3 is a schematic diagram showing an optical-mechanical module of an optical drive according to a preferred embodiment of the present invention.

FIG. 4A is an exploded schematic view showing a spindle motor and a main rod of the optomechanical module of FIG. 3 .

FIG. 4B is a composite view showing FIG. 4A.

FIG. 5 is a schematic view showing another supporting pad disposed on the bottom plate of the spindle motor for fixing the main rod.

Explanation of reference signs:

100, 300: Optical-mechanical module

102, 302: bracket

104, 304, 504: Spindle motor bottom plate

106, 306: Spindle motor

108, 308: leading rod

110, 310: optical read-write head

112a: The first main rod base

112b: second main rod base

114a: First locking screw

114b: Second locking screw

116a, 316a: first rod end

116b, 316b: second rod end

118, 318: shaft sleeve

120, 320: auxiliary guide rod

122a: the first locking component group

122b: the second locking component group

312a: first bump

312b: second bump

324, 524: extension

326a, 526a: first depression

326b, 526b: second depression

512a: the first support cushion

512b: Second supporting cushion

Detailed ways

The present invention is described in detail with a preferred embodiment. However, this embodiment does not limit the protection scope of the present invention. The embodiment herein is only an optical-mechanical module of an optical drive under the inventive spirit of the present invention. Hereinafter, the technical characteristics of the present invention will be described in detail.

Please refer to FIG. 3 , FIG. 4A and FIG. 4B at the same time. 3 is a schematic diagram showing an optical-mechanical module of an optical drive according to a preferred embodiment of the present invention, FIG. 4A is an exploded schematic diagram showing a spindle motor and a main rod of the optical-mechanical module in FIG. 3 , and FIG. 4B is a combined diagram showing FIG. 4A . The optical-mechanical module 300 of the optical drive of the present invention mainly includes a bracket 302 , a spindle motor bottom plate 304 , a spindle motor 306 , a main rod 308 and an optical read-write head 310 .

Please refer to FIG. 4A and FIG. 4B . The spindle motor 306 is disposed on the spindle motor bottom plate 304 , and the spindle motor bottom plate 304 coupled with the spindle motor 306 has an extension portion 324 . The spindle motor bottom plate 304 includes a first bearing portion and a second bearing portion, which may be, for example, a pair of first protrusions 312 a and a pair of second protrusions 312 b. The pair of first protrusions 312 a and second protrusions 312 b are respectively disposed on two sides of the extension portion 324 of the spindle motor bottom plate 304 . The pair of first bumps 312a has a first concave portion 326a, and the pair of second bumps 312b has a second concave portion 326b.

The leading rod 308 has a first rod end 316a and a second rod end 316b, and the pair of first protrusions 312a and second protrusions 312b are opposite to the first rod end 316a and the second rod end 316b respectively. The first recessed portion 326 a and the second recessed portion 326 b are respectively used for accommodating and fixing the first rod end 316 a and the second rod end 316 b so that the main rod 308 is disposed on the extension portion 324 of the spindle motor bottom plate 304 .

Moreover, the optical read-write head 310 is configured on the main rod 308 in a manner that can move along the axial direction of the main rod 308 . For example, the optical read-write head 310 is fixedly connected with a shaft sleeve 318, and the shaft sleeve 318 fixedly connected with the optical read-write head 310 is sleeved with the main rod 308, so that the optical read-write head 310 can pass through the shaft sleeve 318 and can move along the main rod 308. axial movement.

In addition, please refer to FIG. 3 at the same time. The bracket 302 is also equipped with a secondary guide rod 320. The secondary guide rod 320 is used to support the moving optical read-write head 310, so that the optical read-write head 310 can access the receiving spindle motor in a stable manner. 306 drives a rotating disc. Finally, the spindle motor base plate 304 on which the main rod 308 and the spindle motor 306 are disposed is disposed on the bracket 302 to form the optical-mechanical module 300 as shown in FIG. 3 . Furthermore, the optical-mechanical module 300 can be combined with the optical drive body through the bracket 302 to become an optical drive. That is, the bracket 302 is disposed on the body of the optical drive, and can become an optical drive.

Please refer to FIG. 5 . FIG. 5 is a schematic diagram showing another supporting pad disposed on the bottom plate of the spindle motor for fixing the main rod. Shown is an extension 524 of the spindle motor base plate 504 . Besides the paired first protrusion 312a and second protrusion 312b in the above-mentioned embodiment, the assembly disposed on the bottom plate of the spindle motor and used to fix the main rod can also be implemented by the following methods.

The spindle motor bottom plate 504 includes a first bearing portion and a second bearing portion which may be, for example, a first bearing pad 512a and a second bearing pad 512b. The first support pad 512 a and the second support pad 512 b are respectively disposed on two sides of the extension portion 524 of the spindle motor bottom plate 504 . The first supporting pad 512a has a first concave portion 526a, and the second supporting pad 512b has a second concave portion 526b.

The above-mentioned first support pad 512a and second support pad 512b are respectively opposite to the first rod end 316a and the second rod end 316b of the leading rod 308 as shown in FIG. 4A . The first recessed portion 526a and the second recessed portion 526b are respectively used to accommodate and fix the first rod end 316a and the second rod end 316b in FIG. superior.

Furthermore, in FIG. 4A , the pair of first protrusions 312 a and second protrusions 312 b can be integrally formed on the extension portion 324 of the spindle motor bottom plate 304 . In FIG. 5 , the first supporting pad 512a and the second supporting pad 512b can be integrally formed respectively. In addition, the first support pad 512a and the second support pad 512b can be respectively formed on the extension portion 524 of the spindle motor bottom plate 504 by injection molding.

It can be known from the above embodiments that in the optical-mechanical module 300 of the optical drive of the present invention, since the main rod 308 and the spindle motor 306 are both arranged on the spindle motor base plate 304, it is different from the traditional optical-mechanical module 100 of the main rod 108 and the spindle motor. 106 are respectively disposed on the bracket 102 and the spindle motor base plate 104 .

Therefore, for the distance Y2 from the rotation center of the spindle motor 306 to the axis center of the main rod 308, there will only be accumulated between the spindle motor 306 and the spindle motor bottom plate 304, and the pair of first protrusions 312a, second Between the bump 312b and the spindle motor base plate 304, or between the first bearing pad 512a, the second bearing pad 512b and the spindle motor base plate 504, the leading rod 308 and the paired first bump 312a, the second bump 312b, or the assembly tolerance between the first supporting pad 512a and the second supporting pad 512b. Moreover, only the manufacturing tolerances of the above-mentioned components will accumulate. However, there are less assembly tolerances between the spindle motor bottom plate 304 and the bracket 302 and manufacturing tolerances of the bracket 302 .

Moreover, since the pair of first protrusions 312a and second protrusions 312b are integrally formed on the extension portion 324 of the spindle motor bottom plate 304, or the first bearing pad 512a and the second bearing pad 512b are respectively It is formed on the extension portion 524 of the spindle motor bottom plate 504 by injection molding. Therefore, the assembly accuracy is high, and the assembly tolerance between the paired first protrusions 312a, the second protrusions 312b, or the first support pad 512a, the second support pad 512b and the spindle motor bottom plate 304 is greatly reduced.

Therefore, for the optical-mechanical module 300 of the optical drive of the present invention, for the distance Y2 from the rotation center of the spindle motor 306 to the shaft center of the main rod 308 , only a small tolerance will be accumulated. This will make Y2 less deviate from the design value, greatly improve the access capability of the optical-mechanical module 300 to the optical disc, and then effectively improve the quality of the optical drive.

In summary, although the present invention has been disclosed as above with embodiments, it is not intended to limit the present invention. Those of ordinary skill in the art can certainly make various modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined in the appended claims.

Claims (4)

1. CD-ROM drive comprises at least:

One carriage;

One Spindle Motor base plate is disposed on the described carriage;

One first supporting part is arranged on the described Spindle Motor base plate;

One second supporting part is arranged on the described Spindle Motor base plate;

One Spindle Motor is disposed on the described Spindle Motor base plate;

One leading rod has one first rod end and one second rod end, and wherein, described first supporting part and described second supporting part in order to carry fixing described first rod end and described second rod end, are disposed on the described Spindle Motor base plate described leading rod respectively; And

One optical read/write head is being arranged on the described leading rod along the axially movable mode of described leading rod.

2. CD-ROM drive as claimed in claim 1, wherein, described first supporting part is a pair of first projection, and described second supporting part is a pair of second projection, described this to first projection and described this to second projection is formed on the described Spindle Motor base plate in integrated mode respectively.

3. CD-ROM drive as claimed in claim 1, wherein, described first supporting part is one first breasting pad, and described second supporting part is one second breasting pad, and described first breasting pad and the described second breasting pad are respectively integrated structure.

4. CD-ROM drive as claimed in claim 1, wherein, described first breasting pad and the described second breasting pad are formed on the described Spindle Motor base plate in the mode of injection molded respectively.

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