KR20000012253U - Jig for Suspension Wire Assembly of Optical Pickup Actuator - Google Patents

Abstract

The present invention is for fixing the suspension wires inserted into the first and second wire holes respectively formed in the first and second wire fixing portions formed upright on both sides of the jig so as not to flow to the first and second magnet fixing pieces. will be.

The present invention forms the first cutout 82 and the second cutout 92 so that half of the cross-sections of the first wire hole 86 and the second wire hole 96 are opened in the longitudinal direction, respectively. The first magnet fixing piece 84 and the second magnet fixing piece 94 are attached to the first cutout 82 and the second cutout 92, respectively, and the first and second magnet fixing pieces 84 and 94 are attached. ) Presses and fixes the suspension wires 130 inserted into the first and second wire holes 86 and 96, respectively, so that the positions of the suspension wires 130 soldered to the coil PCs 148 are fixed, and By providing the lens holder 140 so that the spacing between the suspension wires 130 is constant, there is an effect of reducing the occurrence of tilt in the lens holder 140 and at the same time reducing the occurrence of negative resonance also when driving the lens holder 140. .

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, a suspension wire inserted into each of the first and second wire holes respectively formed in the first and second wire fixing portions formed upright on both sides of the jig. A fixing jig for assembling a suspension wire of an optical pickup actuator for securing a precise bonding effect by fixing the first and second magnets so as not to flow through the fixing piece.

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 first and second wire holes 182 and 192 of the jig 160 are larger than the diameter of the suspension wire 130 to facilitate the insertion of the suspension wire 130. In the process of soldering to 148 to some degree flow.

When the suspension wire 130 flows in this manner, the position of the suspension wire 130 soldered to the coil PC 148 becomes uneven, and the interval of each suspension wire 130 becomes uneven.

Therefore, even when the jig 160 is used, the tilt of the objective lens holder 140 may not be completely removed. Accordingly, there is a problem that negative resonance occurs even when the lens holder 140 is driven.

The present invention has been made in order to improve the conventional problems, the object of the present invention is a suspension wire inserted into the first and second wire holes respectively formed in the first and second wire fixing portion formed upright on both sides of the jig, respectively By fixing so as not to flow to the first and second magnet fixing piece, it is to obtain a precise adhesive effect.

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.

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

Figure 4 is a perspective view of the use state of the jig for assembling the suspension wire according to the present invention.

Figure 5 is a cross-sectional view of the use state of the jig for assembling the suspension wire according to the present invention.

<Explanation of symbols for main parts of drawing>

60: jig 62: yoke fixing part

64: fixing pin 70: holder fixing

80: first wire fixing portion 82: first cutting portion

84: first magnet fixing piece 86: first wire ball

88: first extension portion 90: second wire fixing portion

92: second incision 94: second magnet fixing piece

96: second wire ball 98: second extension portion

99: third magnet fixing piece 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 provides a yoke fixing part for fixing the yoke with a fixing pin, a holder fixing part for fixing the lens holder, a first wire fixing part having a plurality of first wire holes for supporting one end of the suspension wire, and the suspension. In the jig for assembling a suspension wire of an optical pickup actuator comprising a second wire fixing part in which a plurality of second wire holes for supporting the other end of the wire are perforated, each of the first wire hole and the second wire hole have a length of half of the cross section of the first wire hole. The first cutout and the second cutout are respectively formed to open in the direction, and the first magnet fixing piece and the second magnet fixing piece are attached to the first cutout and the second cutout, respectively.

With this suspension wire assembly jig, the suspension wire is passed through the first wire hole, inserted through the suspension PCB and the gel holder into the second wire hole, and then partially inserted into the opened first and second wire holes. When the wire is pressed and fixed with the first and second magnet fixing pieces, both ends of the suspension wire do not flow, so that the wire can be stably adhered to the coil PC and the suspension PCB.

Therefore, the position of the suspension wire fixed to the coil PC and the suspension PCB becomes constant, and the interval of each suspension wire becomes constant, eliminating the tilt generated in the lens holder, and reducing the negative resonance generated when driving the lens holder. Can be.

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

First, as shown in FIG. 3, the yoke fixing part 62 fixing the yoke 110 with the fixing pin 64, the holder fixing part 70 fixing the lens holder 140, and the structure of the present embodiment. In addition, the first wire fixing part 80 having a plurality of first wire holes 86 for supporting one end of the suspension wire 130 and a plurality of second wires for supporting the other end of the suspension wire 130 are provided. A hole 96 is applied to the suspension wire assembly jig of the optical pickup actuator consisting of the perforated second wire fixing portion 90.

In this embodiment, the first cutouts 82 and the second cutouts 92 are formed so that half of the cross sections of the first wire holes 86 and the second wire holes 96 are opened in the longitudinal direction, respectively. The first magnet fixing piece 84 and the second magnet fixing piece 94 are attached to the first cutout 82 and the second cutout 92, respectively. Since the first and second wire holes 86 and 96 are formed at two sides, respectively, two first and second magnet fixing pieces 84 and 94 are provided. In addition, the first and second wire fixing parts 80 and 90 may be formed of a metallic material so that the first and second magnet fixing pieces 84 and 94 may be bonded to each other.

In addition, the first wire hole 86 is formed to penetrate the suspension wire 130 to pass therethrough, and forms a first extension portion 88 to facilitate the insertion of the suspension wire 130 at the top thereof. The second wire hole 96 forms second and third extensions 98 and 99 in the second cutout 92 to facilitate insertion of the suspension wire 130, and blocks the outer end thereof. Suspension wire 130 does not escape.

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

When using the jig 60 of the present embodiment, the hole 119 formed in the yoke 110 is inserted into the fixing pin 64 and seated on the yoke fixing portion 62, and then the shape formed on the bottom surface of the lens holder 140. The lens holder 140 is seated on the holder fixing part 70 by using. 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 as shown in Figure 4, the suspension PCB 122 And into the second wire hole 96 through the gel holder 120. In this case, the first to third extension parts 88, 98 and 99 formed in the first and second wire holes 86 and 96 facilitate 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, if the objective lens 142 is not fixed to the lens holder 140, the screw shaft 72 is formed on the holder fixing part 70, and then passes through the groove to which the objective lens 142 is coupled. The lens holder 140 may be fixed by fastening with a clamp.

Meanwhile, the suspension wire 130 inserted into the first and second wire holes 86 and 96 as described above is partially opened. As shown in FIG. 5, the first and second magnet fixing pieces 84 and 94 are disposed. When coupled to the first and second cutouts 82 and 92, the first and second magnet fixing pieces 84 and 94 are attached to the first and second wire fixing parts 80 and 90 by magnetic force, respectively, and the suspension wires are respectively. Press 130. As a result, the suspension wire 130 is inserted into the first and second wire holes 86 and 96 larger than the diameter but does not flow due to the pressing action of the first and second magnet fixing pieces 84 and 94.

As described above, when the suspension wire 130 is located at the actual installation height, the suspension wire 130 is soldered and fixed to the part contacting the suspension PCB 122 and the part contacting the coil PCB 148, respectively, so that Power applied to the suspension PCB 122 is delivered to the tracking coil 146 and the focusing coil 144.

When the jig 60 of the present embodiment is used in this way, the position of the suspension wire 130 to be soldered to the coil PC 148 is made constant, and the lens holder is in a state in which the interval between the respective suspension wires 130 is constant. By floating the 140, the tilt 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 a yoke fixing portion 62 for fixing the yoke 110 with a fixing pin 64, the holder fixing portion 70 for fixing the lens holder 140, A plurality of first wire fixing holes 80 for supporting one end of the suspension wire 130 and a plurality of second wire holes for supporting the other end of the suspension wire 130 are formed. In the suspension wire assembly jig of the optical pickup actuator composed of the second wire fixing part 90 having a perforation of 96, half of the cross-sections of the first wire hole 86 and the second wire hole 96 are in the longitudinal direction. The first cutout 82 and the second cutout 92 are respectively formed to open to each other, and the first magnet fixing piece 84 and the second cutout 82 and the second cutout 92 are formed. Attaching the magnet fixing piece 94, the first and second magnet fixing pieces 84 and 94 are inserted into the first and second wire holes 86 and 96, respectively. Since the respective suspension wires 130 are pressed and fixed, the position of the suspension wires 130 soldered to the coil PC 148 is fixed, and the lens holder 140 is made to have a constant interval between the respective suspension wires 130. By reducing the number of tilts of the lens holder 140 and at the same time driving the lens holder 140, there is an effect of reducing the occurrence of negative resonance.

Claims (1)

A plurality of yokes for fixing the yoke 110 with the fixing pin 64, a holder fixing portion 70 for fixing the lens holder 140, and one end of the suspension wire 130 The first wire fixing part 80 in which the first wire hole 86 is drilled and the second wire fixing part 90 in which the plurality of second wire holes 96 are supported to support the other end of the suspension wire 130. In the jig for assembling the suspension wire of the optical pickup actuator consisting of The first cutout 82 and the second cutout 92 are respectively formed such that half of the cross sections of the first wire hole 86 and the second wire hole 96 are opened in the longitudinal direction, The first magnet fixing piece 84 and the second magnet fixing piece 94 are attached to the first cutout 82 and the second cutout 92, respectively. Jig.