KR20000013733U - Jig for Suspension Wire Assembly of Optical Pickup Actuator - Google Patents

Abstract

The present invention aims to reduce the tilt generated in the lens holder by preventing the suspension wire from sagging near the coil PC, thereby increasing the assembly precision of the suspension wire.

The present invention for this purpose is the first wire fixing portion 80 in which the plurality of first wire holes 82 into which the suspension wires 130 are inserted are drilled, and the suspension wires at positions corresponding to the first wire holes 82. As a jig for assembling a suspension wire of an optical pickup actuator having a second wire fixing part 90 having a trocar 80 having a second wire hole 92 through which 130 is passed, the trocar 94 is a coil PC ( Since the suspension wire 130 is supported in the vicinity of 148, the position of the suspension wire 130 soldered to the coil PC 148 is kept constant, and the suspension wire 130 is prevented from vibrating due to external impact. Since the distance between the respective suspension wires 130 can be soldered, the tilt of the lens holder 140 can be reduced, and the generation of negative resonance can be reduced even when the lens holder 140 is driven.

Description

Jig for Suspension Wire Assembly of Optical Pickup Actuator

The present invention relates to a jig for assembling a suspension wire of an optical pickup actuator, and in particular, by forming a trocar having a wire hole through which a suspension wire passes through a wire fixing part on one side, an optical pickup that prevents the suspension wire from sagging near the coil PC ratio. It relates to a jig for assembling a suspension wire of an actuator.

In general, the optical pickup actuator moves the objective lens in the radial direction to shift the track of the disk when an error in the optical axis direction or a radial direction error occurs in the focus of the laser light formed on the recording pit of the disc through the objective lens in the hologram element. It is used as a driving means for finding and correcting an error of laser light focus by moving in the focus direction and adjusting the size of the focus.

A wire driving actuator generally used among these optical pickup actuators is shown in FIG. 1.

The actuator has a shape in which the lens holder 140 fixing the objective lens 142 is installed to the yoke 110 with a suspension wire 130 so as to be movable. The objective lens 142 is located at the center of the lens holder 140. ) Is wound, and the focusing coil 144 is wound around the lens holder 140, and then the tracking coil 146, which is wound in a rectangular shape in advance, is attached thereto. The coil PC 148 is fixed to both sides of the lens holder 140 to connect the tracking coil 146 and the focusing coil 144.

In addition, the yoke 110 forms a pair of symmetrical outer bent pieces 114 and attaches and fixes the magnet 118 for generating an electromagnetic force by applying magnetic flux to the tracking coil 146 and the focusing coil 144. A pair of inner bent pieces 112, which are symmetrical to the inside of the outer bent piece 114, is bent upwardly at the yoke 110 to induce the flow of magnetic flux in the magnet 118, whereby the magnetic flux of the magnet 118 A magnetic closure circuit is formed to strongly pass the tracking coil 146 and the focusing coil 144 horizontally, pass through the planes of the inner bent piece 112 and the yoke 110, and enter the magnet 118.

In addition, a second bent piece 116 is formed at one edge of the yoke 110 to fix the gel holder 120 and the suspension PCB 122 with screws 124, and one end of the suspension wire 130 is fixed to the lens holder. By connecting the coil PC 148 bonded to the 140 and the other end to the suspension PCB 122, the lens holder 140 is lifted and installed by the suspension wire 130, and the suspension PCB from the signal processing unit Current applied to the 122 is transmitted through the suspension wire 130 to the tracking coil 146 and the focusing coil 144. In addition, the suspension wire 130 passes through the inside of the gel holder 120, and the viscous damping gel 121 is injected into the inside of the gel holder 120 so that the negative resonance of the suspension wire 130 is damped gel ( 121).

In the optical pickup actuator having such a structure, the lens holder 140 to which the objective lens 142 is fixed is lifted depending on the suspension wire 130, and the suspension wire 130 is connected to the coil PC 148. In the process of assembling the suspension PCB 122 by soldering, the lens holder 140 may be soldered in an inclined state.

When the tilt is issued to the lens holder 140 as described above, refraction occurs in the optical axis of the laser beam passing through the objective lens 142 fixed to the lens holder 140, thereby providing accurate focus to the recording pit formed on the disk vertically upward. Since it is impossible to form, driving of the focusing direction of the lens holder 140 also does not coincide with the optical axis, making it difficult to track the recording feet of optical focus.

In this case, there is a separate adjustment process of adjusting the tilt of the lens holder 140 by adjusting the height balance installed in the pickup base, but the process of assembling the suspension wire 140 to the lens holder 140. In this case, when the tilt of the lens holder 140 becomes larger than a predetermined value, there is a problem in that the tilt of the lens holder 140 cannot be completely adjusted in a separate tilt adjustment process.

Accordingly, after fixing the suspension wire 140 using the jig 160 shown in FIG. 2, both ends of the suspension wire 140 are soldered and fixed to the coil PC 148 and the suspension PC 122.

The jig 160 includes a yoke fixing part 162 for fixing the yoke 110 with a fixing pin 164, a holder fixing part 170 for fixing the lens holder 140, and a suspension wire 130. A second wire fixing part having a first wire fixing part 180 having a perforated first wire hole 182 for supporting one end and a second wire hole 192 for supporting the other end of the suspension wire 130 190). Here, the first wire hole 182 is completely penetrated so that the suspension wire 130 is completely passed, and the second wire hole 192 is blocked at the outer end thereof so that the suspension wire 130 does not exit.

When using the jig 160, the hole 119 formed in the yoke 110 is inserted into the fixing pin 164 to be seated on the yoke fixing part 162, and then the shape formed on the bottom surface of the lens holder 140 is used. The lens holder 140 is seated on the holder fixing part 170. In this state, the lens holder 140 is fixed higher than the yoke 110 to have the same height as the assembled state.

In this state, by pressing and fixing the upper surface of the lens holder 140 with a separate fixing member, the four suspension wires 130 are inserted into the first wire hole 182 to hold the suspension PCB 122 and the gel holder 120. When inserted into the second wire hole 192, the suspension wire 130 is in the position where it is actually assembled. Subsequently, when the suspension wire 130 solders and fixes the part contacting the suspension PCB 122 and the part contacting the coil PCB 148, respectively, the power applied to the suspension PCB 122 from the outside is applied to the tracking coil 146. And the focusing coil 144.

As such, when the conventional jig 160 is used, the suspension wire 130 may be adhered while reducing the tilt of the lens holder 140.

However, the conventional jig 160 has the coil PC 148 because the suspension wire 130 spanning the first and second wire holes 182 and 192 sags downward near the coil PC 148 and vibrates even with a small impact. It is difficult to solder correctly at the point to be soldered.

For this reason, even when using the conventional jig 160, the interval between the upper and lower suspension wires 130 is not constant, there was a problem that the tilt occurs in the lens holder 140.

The present invention is devised to improve the conventional problems, and an object of the present invention is to reduce the tilt generated in the lens holder by preventing the suspension wire from sagging near the coil PC ratio, thereby increasing the assembly precision of the suspension wire. .

1 is a perspective view showing a general optical pickup actuator.

Figure 2 is a perspective view of a jig for assembling a conventional suspension wire.

3 is an exploded perspective view and a partially enlarged view of a jig for assembling the suspension wire according to the present invention.

Figure 4 is a perspective view of the use of the suspension wire assembly jig shown in FIG.

<Explanation of symbols for main parts of drawing>

60: jig 62: yoke fixing part

64: fixing pin 70: holder fixing

72: screw shaft 80: first wire fixing portion

82: first wire hole 90: second wire fixing portion

92: second wire hole 94: trocar

96: expansion unit 110: yoke

120: gel holder 122: suspension PCB

130: suspension wire 140: lens holder

144: focusing coil 146: tracking coil

148: coil PC

The present invention for achieving the above object, the yoke fixing portion having a fixing pin coupled to the yoke, a holder fixing portion formed on the yoke fixing portion to secure the lens holder, and one side of the yoke fixing portion A jig for assembling a suspension wire of an optical pickup actuator, comprising: a first wire fixing part formed with a plurality of first wire holes into which a plurality of first wire holes are inserted, and a second wire fixing part formed on the other side of the yoke fixing part; The second wire fixing part may include a trocar having a second wire hole through which the suspension wire passes at a position corresponding to the first wire hole.

With such a suspension wire assembly jig, the suspension wire is passed through the first wire hole and inserted through the suspension PC and the gel holder into the second wire hole near the coil PC, so that the suspension wire is to be bonded by trocar. It is accurately positioned at the position and is prevented from vibrating.

Therefore, since the position and spacing of the suspension wire are constant, the tilt generated in the lens holder can be reduced.

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

3 is a perspective view of the jig according to the present embodiment.

As shown in the figure, a yoke fixing portion 62 having a fixing pin 64 fixed to the yoke 110 and a holder height formed on the yoke fixing portion 62 to fix the lens holder 140. The first wire fixing part 80 formed on one side of the fixing part 70, the yoke fixing part 62, and the plurality of first wire holes 82 into which the suspension wire 130 is inserted, and the yoke fixing part It is applied to the suspension wire assembly jig of the optical pickup actuator which consists of the 2nd wire fixing part 90 formed in the other side of 62. As shown in FIG.

Here, the trocar 80 having the second wire hole 92 through which the suspension wire 130 passes is formed at the position corresponding to the first wire hole 82 in the second wire fixing part 90. The trocar 80 is set to a length located near the coil PC 148.

On the other hand, the first wire hole 82 is formed so as to pass through the suspension wire 130, and extends the inlet to facilitate the insertion of the suspension wire (130). In addition, the second wire hole 92 at the tip of the trocar 80 forms an extension 96 to facilitate the insertion of the suspension wire 130, and the outer end is blocked to allow the suspension wire 130 to escape. Do not

Hereinafter, the operation of the suspension wire assembly jig having the above configuration will be described.

4 shows a state in which the optical pickup actuator is seated on the jig according to the present embodiment.

As shown in this figure, the hole 119 formed in the yoke 110 is inserted into the fixing pin 64 to be seated on the yoke fixing part 62, and then the shape formed on the bottom surface of the lens holder 140 is used. The lens holder 140 is mounted on the holder fixing part 70. In this state, the lens holder 140 is fixed higher than the yoke 110 to have the same height as the assembled state.

In this state, by pressing and fixing the upper surface of the lens holder 140 with a separate fixing member, and then pass the four suspension wires 130 through the first wire hole 86, the suspension PCB 122 and the gel holder 120 Passing through the vicinity of the coil PC 148 is inserted into the second wire hole (96). At this time, the extension portion 96 of the trocar 94 facilitates the insertion of the suspension wire 130.

In this figure, the fixing member is omitted to show the main part of the present invention. As the fixing member, one side is fixed to the first or second wire fixing part 80 or 90 so that the other side of the lens holder 140 is fixed. A leaf spring, etc., which is held on the upper surface can be used. In addition, in the process of soldering the suspension wire 130 first without fixing the objective lens 142 to the lens holder 140, a screw shaft 72 is formed in advance in the holder fixing part 70 as shown in FIG. The lens holder 140 may be fixed by having a clamp coupled to the screw shaft 72.

On the other hand, when the suspension wire 130 is located at the actual installation height as described above, the suspension wire 130 by soldering and fixing the parts in contact with the suspension PCB 122 and the parts in contact with the coil PCB 148, respectively, Power from the suspension PCB 122 to the tracking coil 146 and the focusing coil 144.

When the jig 60 of this embodiment is used as described above, since the trocar 94 supports the suspension wire 130 near the coil PC 148, the position of the suspension wire 130 soldered to the coil PC 148. Is constant and vibration of the suspension wire 130 does not occur even by an external impact.

Therefore, by soldering in a state where the intervals between the respective suspension wires 130 become constant, tilt generation of the lens holder 140 can be reduced. Accordingly, the occurrence of negative resonance is also reduced even when the lens holder 140 is driven.

As described in the above embodiment, the present invention is to the first wire fixing portion 80 and the first wire hole 82, the plurality of first wire hole 82 is inserted into the suspension wire 130 is inserted As a jig for assembling a suspension wire of an optical pickup actuator having a second wire fixing part 90 having a trocar 80 having a second wire hole 92 through which a suspension wire 130 passes at a corresponding position, a trocar ( 94 supports the suspension wire 130 in the vicinity of the coil PC 148 so that the position of the suspension wire 130 soldered to the coil PC 148 is fixed, and the suspension wire 130 is caused by external impact. Since it can be soldered so that the space | interval between each suspension wire 130 becomes constant as it prevents from vibrating, the generation | occurrence | production of negative resonance also occurs in the drive of the lens holder 140 while reducing the tilt generation of the lens holder 140. Reduce There is an effect.

Claims (1)

A yoke fixing part 62 having a fixing pin 64 fixed to the yoke 110, a holder fixing part 70 formed on the yoke fixing part 62 to fix the lens holder 140, and A first wire fixing part 80 formed at one side of the yoke fixing part 62 and having a plurality of first wire holes 82 into which the suspension wire 130 is inserted, and the other side of the yoke fixing part 62. In the jig for assembling the suspension wire of the optical pickup actuator consisting of a second wire fixing portion 90 formed in the; The second wire fixing part 90 may include a trocar 80 having a second wire hole 92 through which the suspension wire 130 passes, at a position corresponding to the first wire hole 82. Suspension wire assembly jig for optical pickup actuators.