KR100595514B1 - Clamp of optical diskdrive and a method thereof - Google Patents

Abstract

The present invention relates to an integrated clamp of an optical disc drive and a method for manufacturing the same, comprising: a clamp plate formed of a material attached to a magnet to prevent separation of an optical disc seated in the optical disc drive; A clamp body to which the clamp plate is fixed and having a contact surface in close contact with the turntable; A hook protruding from the clamp body through the clamp plate to fix the clamp plate to the clamp body, the end shape having a screw head shape; Provided is an integrated clamp of an optical disk drive and a method of manufacturing the same, which are manufactured by press-processing the clamp plate to a clamp body molding die and integrally molded with the clamp body, thereby reducing the manufacturing process and cost.

Optical disc drive, clamp, clamp plate, forming fixture

Description

Integrated clamp of optical disk drive and manufacturing method thereof {CLAMP OF OPTICAL DISKDRIVE AND A METHOD THEREOF}

1 is a plan view showing the configuration of an optical disc drive

Figure 2 is a side view of Figure 1

3 to 5 are related to the clamp of the conventional optical disk drive,

3 is a plan view

FIG. 4 is a side cross-sectional view of the clamp with permanent magnets along cut line IV-IV of FIG.

FIG. 5 is a side cross-sectional view of the clamp without permanent magnets along cut line IV-IV of FIG.

6 to 10 are related to the integrated clamp of the optical disk drive according to an embodiment of the present invention,

6 is a plan view

FIG. 7 is a side cross-sectional view taken along the line VII-VII of FIG. 6

8 is a plan view of the clamp plate

9 is a schematic cross-sectional view of a mold assembly shape for manufacturing the integrated clamp of the optical disk drive of FIG.

Fig. 10 relates to the lower mold of Fig. 9, in which Fig. 10 (a) is a plan view and Fig. 10 (b) is a front sectional view along the cutting line Ⅹ-Ⅹ of Fig. 10 (a).

** Description of symbols for the main parts of the drawing **

1: optical disk drive 100: clamp

110: clamp body 111: body body

112: hook 113: clamping plate fixed shaft

120: clamp plate 122: center through hole

123: position fixing hole 124: hook through hole

200: mold for forming the clamp body 210: upper mold

212: hook portion 220: lower mold

223: fixing protrusion

The present invention relates to an integrated clamp of an optical disk drive and a method for manufacturing the same, and more particularly, to an optical disk for reducing the manufacturing process and cost by integrally molding a clamp body manufactured by press working and a clamp body manufactured by casting by a mold. An integrated clamp of a drive and a method of manufacturing the same.

As shown in Fig. 1 and Fig. 2, the optical disc drive 1 mounts and rotates a pickup device 20 for reproducing and recording data of the inserted optical disc 10, and the optical disc 10 on the turntable 31. As shown in Figs. A case 60 forming the outer shape of the optical disk drive 1 and the front rubber 40 and the rear rubber 50 for supporting the spindle motor 30, the support 32 for supporting the spindle motor 30. And a tray 70 which is drawn out to insert the optical disk 10 into the optical disk drive 1 and is inserted from the outside, and the optical disk 10 is not separated from the turntable 31 when the optical disk 10 is rotated. And a clamp 80 for bringing the optical disc 10 into close contact with the turntable 31.

Therefore, when the user places the optical disk 10 in the tray 70 and inserts it into the optical disk drive 1, the spindle motor 30 and the turntable 31 under the inserted tray 70 are elevated by the lifting means. The optical disk 10 coupled to the clamp 80 by a magnet on the spindle motor 30 side or the clamp 80 side, and the optical disk 10 seated on the turntable 31 is in close contact with the turntable 31 by the clamp 80 Even if 10 rotates at a high speed, it is not separated from the turntable 31.

As shown in FIGS. 3-5, the clamp 80 includes a permanent magnet 84 as shown in FIG. 4, and does not include a permanent magnet 84 as shown in FIG. The permanent magnet 84 may be included in the form of the permanent magnet 84. Only one of the spindle motor 30 and the clamp 80 is permanent magnet 84 depending on whether the permanent magnet 84 is included on the spindle motor 30 side. ). Hereinafter, the configuration of the clamp 80 including the permanent magnet 84 will be described in detail.

The clamp 80 generates a contact force between the clamp main body 81 in contact with the optical disk 10 and the turntable 31 and the spindle motor 30 side and the clamp 80 so as to prevent the optical disk 10 from being separated. And a clamp plate 83 formed of a material that adheres to the permanent magnets, and a permanent magnet 84 mounted to the magnet seating groove 81d of the clamp body 81.

The clamp body 81 is injection molded from plastic, and includes a protrusion 81a inserted into a groove (not shown) in the center of the turntable 31 fixed to the rotating shaft of the spindle motor 30, and a protrusion of the turntable 31. And the contact surface 81c which is recessed to be in contact with the optical disk 10 and the contact surface 81c for contacting the optical disk 10 with a contact force, thereby allowing the optical disk 10 to rotate even when the spindle motor 30 rotates the optical disk 10. It is to prevent the departure from the turntable (31).

The clamp plate 83 is formed of a material attached to the magnet by press working, and serves as a medium for mutual attraction by the magnetic force to the clamp 80 and the spindle motor 30 side by the permanent magnet 84. .

In order to assemble the clamp 80, the circular clamp plate 83 is processed by pressing, the clamp main body 81 is formed by a plastic injection mold, and then the magnet seating groove 81d of the clamp main body 81 is formed. ), The clamp 80 is assembled by inserting the clamp plate 83 into the hook 82 of the clamp main body 81. However, the process of fitting the clamp plate 83 into the clamp body 81 is difficult and takes a long time to assemble, and the hook 82 is required to be formed on the clamp body 81 to fix the clamp plate 83. Because of the hassle, there is a need to reduce material costs and shorten assembly time.

The present invention has been made to solve the problems of the prior art as described above, an integral type of the optical disk drive to reduce the manufacturing process and cost by integrally molding the clamp body produced by the press working and the clamp body made of the casting by the mold. It is an object of the present invention to provide a clamp and a method of manufacturing the same.

The present invention provides an optical disc drive having a spindle motor, a turntable fixed to a rotating shaft of the spindle motor, and a clamp in close contact with the turntable to prevent the optical disc from being mounted on the turntable. A clamp plate comprising: a clamp plate formed of a material attached to a magnet; A clamp body to which the clamp plate is fixed and having a contact surface in close contact with the turntable; A hook protruding from the clamp body through the clamp plate to fix the clamp plate to the clamp body, the end shape having a screw head shape; It provides a clamp of the optical disk drive, characterized in that configured to include.

This is because the upper and lower surfaces of the clamp plate are fixed by the upper surface of the clamp body and the bottom surface of the hook, thereby effectively fixing the clamp plate to the clamp body.

Here, the hook is effective in that the integrally formed with the clamp body to more securely fix the clamp plate.

And, it may be configured to further include a permanent magnet seated on the clamp body. This means that the present invention can be applied even when there is no magnet on the spindle motor side.

In addition, it is preferable that the clamp main body is integrally molded in a state in which the clamp plate is installed in a mold for forming a clamp main body, in terms of reducing manufacturing time and cost.

On the other hand, according to another field of the invention, the present invention, in the manufacturing method of the clamp of the optical disk drive to prevent the separation of the optical disk inserted into the optical disk drive, the step of forming a clamp plate formed with a molding fixing portion made of a material that is attached to the magnet Wow; A clamp body molding step of integrally molding the clamp body in a state in which the clamp plate is fixed to the mold for molding a clamp body by the molding fixing part; It provides a clamp manufacturing method of an optical disk drive, characterized in that configured to include.

Here, it is effective that the molding fixing part is formed of a position fixing hole formed through the clamp plate, and the clamping body forming mold has a fixing protrusion to be formed to fix the position fixing hole.

In addition, two or more position fixing holes are preferably formed in terms of fixing the clamp plate to the mold for forming the clamp body without shaking.

On the other hand, according to another field of the invention, the present invention is a molding die for manufacturing the clamp of the optical disk drive of claim 1, comprising a molding fixing portion for fixing the position of the clamp plate formed of a material that is attached to the magnet, A clamp molding die for an optical disc drive is provided, wherein the clamp body having a contact surface in close contact with a turntable is integrally manufactured with the clamp plate.

Here, the molding fixing portion, the position fixing hole formed through the clamp plate; A fixing protrusion formed to engage with the position fixing hole; It is preferable to comprise.

In addition, the clamp molding die is formed of an upper mold and a lower mold, respectively, which form upper and lower portions of the clamp body, and the fixing protrusion is formed on the lower mold so that the clamp plate can be easily fixed to the mold. effective.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in describing the present invention, a detailed description of known functions or configurations will be omitted to clarify the gist of the present invention.

6 to 10 are related to the integrated clamp of the optical disk drive according to an embodiment of the present invention, Figure 6 is a plan view, Figure 7 is a side cross-sectional view along the cutting line VII-Ⅶ of Figure 6, Figure 8 is a clamp plate 9 is a cross-sectional schematic view of a mold assembly shape for manufacturing the integrated clamp of the optical disc drive of FIG. 6, FIG. 10 relates to the lower mold of FIG. 9, FIG. 10 (a) is a plan view, and FIG. It is a sectional front view according to the cutting line VII-V of 10 (a).

The clamp body 110 is injection molded from plastic and forms the outer body and the clamp plate 120 from the clamp body 110 to fix the clamp plate 120 to the clamp body 110. A central shaft protruding in a cross shape on the back surface of the clamp main body 110 so that the hook 112 having a screw head shape and the end of which penetrates through it and the central through hole 122 of the clamp plate 120 is inserted. 113 is provided.

Here, the main body 111 has a protrusion 111a protruding to fit into a groove formed in the center of the upper surface of the turntable 31 and a recessed portion 111b formed so as to fit the protrusion around the groove of the upper surface of the turntable 31. ) And a flat portion 111c for pressing the optical disk 10 seated on the turntable 31 with a predetermined force.

The clamp plate 120 is integrally assembled with the clamp main body 110 and is a circular plate-shaped body press-processed with an iron plate made of a material attached to the magnet to fix the optical disk 10 by the magnetic force of the magnet on the spindle motor 30 side. In order to integrally form with the clamp body 110 and the central through-hole 122 is inserted into the portion 121, the central axis 113 of the clamp body 110 to fix the central position of the clamp plate 120 Three position fixing holes 123 formed to be inserted into the fixing protrusion 223 of the molding die 200 of the clamp body, and the clamp body 120 to fix the clamp plate 120 integrally when the clamp body 120 is molded. The hook 112 of) is provided with three hook through holes 124 formed therethrough.

Here, the clamp plate 120 is fixed to the clamp body 110 by the bottom surface 112a of the hook 112 formed through the hook through hole 124 from the clamp body 110.

Hereinafter, the manufacturing method of an embodiment of the present invention will be described in detail.

In order to manufacture the clamp 100 of the optical disk drive according to an embodiment of the present invention, a mold 200 for forming the clamp body shown in FIGS. 9 and 10 is manufactured.

The clamp body molding die 200 is for forming the clamp body 110 to be integral with the clamp plate 120 by injection molding in a state in which the clamp plate 120 is mounted on the mold 200. An upper mold 210 for forming the upper portion of the 110, and a lower mold 220 for forming the lower portion of the clamp body 110.

Here, the upper mold 210, the hook 112 is formed to protrude through the hook through hole 124 from the clamp body 110 and the hook portion 212 formed in the shape of a screw head on the clamp plate 120 and And a central shaft portion 213 recessed in the shape of the central shaft 113 for fixing the central position of the clamp plate 120.

In addition, the lower mold 220 may be formed in the shape of the protrusion 111a, the recess 111b, and the flat portion 111c so that the clamp body 110 fixes the turntable 31 and the optical disk 10. It is formed to have 221b, 221c, it is provided with a fixing projection 223 is inserted into the position fixing hole 123 of the clamp plate 120 to seat the clamp plate 120 in the mold 200.

Using the clamp body forming mold 200 configured as described above, the position fixing hole 123 of the clamp plate 120 manufactured by press working or the like is fixed to the fixing protrusion 223 of the lower mold 220. In, by pressing the material such as plastic to be molded into the space 230 between the upper mold 210 and the lower mold 220 in the liquid state to harden to form the clamp body 110 integrally with the clamp plate 120. do. At this time, the clamp plate 120 is integrally formed with the clamp main body 110 by the hook 112 of the clamp main body 110.

Therefore, according to an embodiment of the present invention, as the clamp plate 120 is integrally molded to the clamp body 110 without a separate assembly process, the assembly process is simplified, the manufacturing time is shortened, and the formation of the hook is easy. As a result, material costs and manufacturing costs can be reduced.

Meanwhile, in an embodiment of the present invention, in order to fix the clamp plate 120 to the clamp body molding die 200, a position fixing hole is formed in the clamp plate 120, and the fixing protrusion 223 is formed on the mold 200. ), But the present invention is not limited to this fixing method, and includes molding the clamp plate 120 to the mold 200 to form a single body in various forms. In addition, in one embodiment of the present invention has been illustrated that the permanent magnet is not included in the clamp body 110, it may be configured to include a permanent magnet.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

As described above, according to the present invention, a clamp plate formed of a material attached to the magnet to prevent the separation of the optical disk seated in the optical disk drive; A clamp body to which the clamp plate is fixed and having a contact surface in close contact with the turntable; A hook protruding from the clamp body through the clamp plate to fix the clamp plate to the clamp body, the end shape being a screw head shape; Provided is an integrated clamp of an optical disk drive and a method of manufacturing the same, which are manufactured by press-processing the clamp plate to a clamp body molding die and integrally molded with the clamp body, thereby reducing the manufacturing process and cost.

Claims (8)

An optical disc drive having a spindle motor, a turntable fixed to a rotating shaft of the spindle motor, and a clamp in close contact with the turntable to prevent separation of the optical disc seated on the turntable. A clamp plate formed of a material attached to the magnet; A clamp body to which the clamp plate is fixed and having a contact surface in close contact with the turntable; A hook protruding from the clamp body through the clamp plate to fix the clamp plate to the clamp body, the end shape having a screw head shape; Clamp of the optical disk drive, characterized in that it comprises a. The method of claim 1, And the hook is integrally formed with the clamp body. The method according to claim 1 or 2, The clamp of the optical disc drive, characterized in that it further comprises a permanent magnet seated on the clamp body. The method according to claim 1 or 2, And the clamp body is integrally molded in a state in which the clamp plate is installed in a mold for forming a clamp body. In the manufacturing method of the clamp of the optical disk drive to prevent the separation of the optical disk inserted into the optical disk drive, Molding a clamp plate on which a molding fixing part is formed of a material attached to the magnet; A clamp body molding step of integrally molding the clamp body in a state in which the clamp plate is fixed to the mold for molding a clamp body by the molding fixing part; And the molding fixing part is formed of a position fixing hole penetrated through the clamp plate, and the clamp body forming mold has a fixing protrusion formed to fix the position fixing hole. The method of claim 5, The clamp main body forming step includes the step of molding the clamp main body by injection molding so as to be integral with the clamp plate in a state where the clamp plate is fixed to the mold for clamping the main body molding. delete The method of claim 5, Clamp manufacturing method of the optical disk drive, characterized in that two or more position fixing holes are formed.

Images