KR19980030745A - Pickup Cover Measuring Jig of Actuator - Google Patents

Abstract

The present invention is to accurately measure the manufacturing state of the pickup cover 130 by providing a reference point (C) at the same time while fixing the pickup cover 130 not to flow.

According to the present invention, a plurality of fixed arms 120 having insertion grooves 122 into which the top surface 132 of the pickup cover 130 is fitted and fixed, and the fixed arms 120 are formed on the front side and formed on the upper surface 111 are formed. A first reference hole 112 is formed and a second reference hole 114 is formed on the side surface 113 on the same Y axis as the first reference hole 112 and the same X axis as the second reference hole 114. The body 110 includes a third reference hole 116 formed at a predetermined distance.

According to the present invention, the pickup cover 130 can be easily fixed by measuring the manufacturing state, and the pickup cover 130 is provided by providing a reference point C even when the manufacturing state of the side surface 134 of the pickup cover 130 is inspected. The overall manufacturing state of the can be inspected to accurately select the poorly manufactured pickup cover 130 has the effect of improving the quality of the actuator.

Description

Pickup Cover Measuring Jig of Actuator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for measuring a manufacturing state of an actuator pickup cover, and more particularly, to fix a poorly manufactured pickup cover by accurately fixing the manufacturing state of the pickup cover by providing a reference point while fixing the pickup cover without flow. A pickup cover measuring jig of an actuator for sorting.

In general, the optical pickup device is installed in the radial direction of the disc, which is installed below the disc, which is an optical recording medium of various optical disc players such as a mini disc player (MDP), a compact disc player (CDP), or a laser disc player (LDP). While detecting the desired track position on the disc while moving in a straight line, the laser light is incident on the pit recorded on the disc surface at the detected track position, and the reflected light is detected through the optical system, and the detected reflected light is converted into an electrical signal. An apparatus for reproducing the recorded contents on the disk surface.

On the other hand, when the tracking and focusing errors occur in the optical system of the optical pickup device, the actuator moves the objective lens for focusing the laser light on the disk surface in a radial direction and an optical axis direction to precisely move the optical lens onto the disk surface. It is a device for forming a focus.

As shown in FIG. 1, the actuator includes an objective lens holder 30 for fixing the objective lens 34 and a plate 10 for supporting the objective lens holder 30 from the bottom. Is as follows.

A laser through hole 32 is formed in the center of the objective lens holder 30, and an objective lens 34 for focusing the focus on the disk reflection surface is attached above the laser through hole 32. At the periphery of 30, a focusing coil 40 for moving the objective lens 34 in the optical axis direction is wound. A pair of tracking coils 42 moving the objective lens 34 in the radial direction are bonded to both sides of the focusing coil 40, respectively.

In addition, a coil PC 50 to which the tracking coil 42 and the focusing coil 40 are attached to both sides of the objective lens holder 30 is provided, and the coil PC 50 has a focusing coil 40 and a tracking coil. A suspension wire 54 is attached to the input / output signal of the servo system to support 42 the swing of the objective lens holder 30 and attenuate the vibration in the event of an impact from the outside.

On the upper side of the plate 10, a pair of inner yokes 12 are formed to be fluidly fitted to the focusing coil 40 wound on the objective lens holder 30 to form a magnetic closure circuit. A pair of outer yokes 14 are provided to the outside of the magnet 13, the second yoke 16 to which the suspension PCB 58 is bonded is formed on the outer side of the one outer yoke 14. have.

The second yoke 16 is provided with a holder gel 56 in which a viscous damping gel 57 is injected, and the suspension wire 54 of the objective lens holder 30 passes through the holder gel 56. It is adhered to the suspension PC 58.

Thus, when the objective lens 34 attached to the bobbin 20 is moved by the focusing coil 40 and the tracking coil 42 to focus on the recording pit on the disc, the suspension supporting the bobbin 20 is supported. Since the vibration of the wire 54 is rapidly reduced by the damping gel 57, the objective lens 34 can stably form the focus on the disk.

On the other hand, the actuator as described above pick-up cover 60 to protect the objective lens 34, the focusing and tracking coils (40, 42) and the damping gel (57) from external contact or impact and to prevent foreign matter from sticking Is enclosed, and the structure is as shown in FIG.

On the upper surface 64 of the pickup cover 60, a long hole 65 through which a laser focused on the objective lens 32 passes is formed, and a hole for setting a reference point on the long hole 65 and one side on the X-axis ( 66 is formed, and a plurality of hooks 62 are fitted to the plate 10 at the bottom of the side plate 61 to fit into the groove 18 formed in the bottom of the plate 10 of the actuator.

By the way, since the pickup cover 60 is manufactured by press working to bend the flat plate, the partial size of the pickup cover 60 may be out of tolerance, in which case the pickup cover 60 ) Is not accurately fitted in the groove 18 of the plate 10, the assembly is difficult. In addition, when bending occurs in the pickup cover 60, the objective lens holder 30 comes into contact with the bent pickup cover 60 when the objective lens holder 30 moves in the tracking direction or the focusing direction, thereby limiting the operation of the objective lens holder 30. The objective lens 34 fails to focus the laser at the correct position on the disc, resulting in poor picture or sound reproduction.

Therefore, before the pickup cover 60 is assembled to the actuator, the pickup cover 60 is measured by taking an enlarged image of the pickup cover 60 to measure dimensions of the pickup cover 60, and the pickup cover manufactured to a size out of tolerance. (60) shall be screened. However, the pick-up cover 60 has a hook ring 62 formed at the bottom thereof, so that it is difficult to fix it on a flat surface, so that it is difficult to measure by a projector, and a reference point cannot be set on the side 61 of the pick-up cover 60. There is a problem that the state of manufacture of (61) cannot be measured.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a pick-up cover measuring jig of the actuator for accurately measuring the manufacturing state of the pick-up cover with a projector by fixing the pick-up cover so as not to flow will be.

The present invention for achieving the above object, a plurality of fixed arms having an insertion groove that is fixed to the upper surface of the pickup cover, the fixed arm is formed on the front side and the first reference hole is formed on the upper surface and the first reference A second reference hole is formed on the side of the same Y axis as the hole, and the third reference hole is formed at a predetermined distance on the same X axis as the second reference hole.

1 is a perspective view showing a general actuator.

Figure 2 is a perspective view showing the separation of the pickup cover of a typical actuator.

3 is a perspective view of a measuring jig according to the present invention;

4 is a perspective view showing a state of use of the measuring jig according to the present invention.

5 is a perspective view showing a state in which the measuring jig according to the present invention is installed in the projector.

Fig. 6A is a schematic diagram showing a measuring method of a measuring jig according to the present invention.

Explanation of symbols on the main parts of the drawings

100: measuring jig 110: body

111: upper surface 112: first reference hole

113: side 114: second reference hole

116: third reference hole 120: fixed arm

122: insertion groove

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

The structure of this embodiment is demonstrated.

As shown in FIG. 3, the pickup cover measuring jig according to the present embodiment includes a plurality of fixing arms 120 having insertion grooves 122 into which the top surface 132 of the pickup cover 130 is fitted and fixed to the front side of the body 110. ) Is formed, and the first reference hole 112 is formed on the upper surface 111 of the body 110, and the second reference hole 114 is formed on the side surface 113 on the same Y axis as the first reference hole 112. ) Is formed, and the third reference hole 116 is formed at a predetermined distance on the same X axis as the second reference hole 114.

The width of the insertion groove 122 of the fixed arm 120 is good enough that the upper surface 132 of the pickup cover 130 is inserted and does not flow.

An operation according to the use of the pickup cover 130 measuring jig 100 having the above configuration will be described.

4 illustrates that the pickup cover 130 is inserted and fixed to the measuring jig 100. When the pickup cover 130 is inserted into the measuring jig 100, one side of the pickup cover 130 is fixed to the fixing arm 120. Insertion and insertion into the insertion groove 122 of the () so that the pickup cover 130 is fixed by the friction of the insertion groove (122).

When the pickup cover 130 is fixed to the measurement jig 100, the measurement jig 100 is placed on the stage 142 of the projector 140 as shown in FIG. 5, and the image is captured by the objective lens 146 to display the screen ( 148 to measure the manufacturing state of the pickup cover 130.

This operation is performed by first drawing a line connecting the center of the hole 136 and the hole 138 with a reference point C at the center of the long hole 136 of the pickup cover 130 as shown in FIG. An axis is used, and a line orthogonal to the center of the long hole 136 is used as the Y axis to measure a manufacturing state such as the size of the upper surface 132 of the pickup cover 130.

After measuring the manufacturing state of the upper surface 132 of the pickup cover 130, the reference point (C) and the first reference hole 112 formed in the upper surface 111 of the body 110 of the measuring jig 100 The distance is measured and the value L is input to the data processor installed in the projector 140.

Next, as shown in (b) of FIG. 6, the pickup cover 130 is formed on the side surface 113 of the body 110 by holding the body 110 of the fixed measuring jig 100 and rotating it to one side. The second reference hole 114 and the third reference hole 116 are directed upward. In this state, the image is captured by the objective lens 146 of the projector 140 to determine the reference point C in the second reference hole 114 of the body 110 of the measuring jig 100, and then the second reference hole 114 and the third reference hole. A line connecting the reference hole 116 is determined as the X axis.

Then, the horizontal movement micrometer 144 installed in the stage 142 is rotated so that the reference line moves to the side surface 134 of the pickup cover 130 by the distance L. Then, the reference point C is moved on the side surface 134 of the pickup cover 130. In this state, the manufacturing state is determined by measuring the size of the side surface 134 of the pickup cover 130 around the reference point (C).

In addition, the manufacturing state inspection of the other side 134 of the pickup cover 130 is the same as above.

The defective manufacturing pickup cover 130 is removed through the manufacturing state inspection.

After the inspection of one pick-up cover 130, the pick-up cover 130 is removed from the insertion groove 122 formed in the fixed arm 120 of the measuring jig 100 and replaced with a new pick-up cover 130 to continue the test. do.

As described above, the present invention is a jig for fixing the pickup cover 130 to measure the manufacturing state of the pickup cover 130 by the projector 140, the pickup cover 130 by fixing the pickup cover 130 It is possible to accurately measure the manufacturing state of the, and even when inspecting the manufacturing state of the side 134 of the pickup cover 130 by providing a reference point (C) can inspect the overall manufacturing state of the pickup cover 130 By accurately selecting the manufactured pickup cover 130 has the effect of improving the quality of the actuator.

Claims (1)

In the jig for fixing the pickup cover 130 in order to measure the manufacturing state of the pickup cover 130 assembled to the actuator plate by the projector 140, A plurality of fixing arms 120 having insertion grooves 122 into which the top surface 132 of the pickup cover 130 is fitted and fixed; The fixed arm 120 is formed on the front side, the first reference hole 112 is formed on the upper surface 111, the second reference hole on the side surface 113 on the same Y axis as the first reference hole 112 The pick-up cover measuring jig of the actuator, comprising: a body (110) formed, and a body (110) formed with a third reference hole (116) at a predetermined distance on the same X axis as the second reference hole (114).