KR0145501B1 - An assembling device of optical pick up actuator - Google Patents

Abstract

The present invention relates to a device for assembling an optical pickup actuator, wherein the inner and outer yokes (91) and (92) are bent upwards to form a base plate (90) and an inner yoke (where the through hole (93) is formed in the center). 91 is installed between the mounting hole 81, the objective lens 78 is placed on the upper surface, the pressing surface 82 is formed on the bottom surface, the inclined groove 161 is formed to be inclined to one side on the upper surface And a plurality of lower fixing jigs 160 having a plurality of mounting flaws 162 formed on the sidewall surfaces of the inclined grooves 161 and side surfaces of the lower fixing jig 160 to be fixed to the inclined grooves 161 of the lower fixing jig 160. The fixing protrusion 170 is fitted to the mounting flaw 162 of the lower fixing jig 160 and the upper fixing jig having a recess 102 formed with the bottom edge 94 of the base plate 90 at the upper center thereof. 100 and the backing plate 150 which is fastened to the bottom surface of the center of the upper fixing jig 100 by the fixing screw 151. It is fixed by the up and down moving piece 140 to move up and down according to the pressing action, the spring 130 for pushing the up and down moving piece 140 to the bottom, and the shanghai east piece 140 A circular plate spring coupled to the pressing protrusion 141 and fitted into the fitting hole 81 of the objective lens holder 80 to be expanded by the upward movement of the up and down moving pieces 140 to fix the objective lens holder 80 ( 110 and the bottom surface of the upper fixing jig 100 is fixed by the fastening screw 121 is opened by the upward movement of the up and down moving piece 140, the pressing surface 82 of the objective lens holder 80 The assembly device of the optical pick-up actuator, characterized in that it consists of a plate spring 120 for crimping and fixing, to improve the assembly and workability of the optical pickup actuator by fast and precisely fixing the objective lens holder.

Description

Assembly device of optical pickup actuator

1 is an exploded perspective view of a conventional objective lens holder fixing device,

2 is a state diagram used in the conventional objective lens holder fixing device.

3 is a cross-sectional view of the assembly apparatus according to the present invention.

4 is a perspective view of a circular leaf spring according to the present invention.

5 is a plan view of the assembly apparatus according to the present invention.

6 is a main cross-sectional view of the main assembly of the present invention.

* Explanation of symbols for main parts of the drawings

100: upper fixing jig 110: round leaf spring

120: leaf spring 140: up and down moving

150: support plate 160: lower fixing jig

The present invention relates to an optical pickup actuator, and in particular, the objective lens holder of the optical pickup actuator is fixed by a circular plate spring and a plate spring protruding from the upper fixing jig, thereby quickly and accurately fixing the objective lens holder. The present invention relates to an assembly apparatus for an optical pickup actuator that prevents the lens holder from being detached from the top of the lens holder.

In general, the optical pickup actuator is installed in the vertical direction below the disc, which is an optical recording medium of various optical disc players such as a mini disc player (MDP), compact disc player (CDP), or laser disc player (LDP), and has a straight line in the radial direction of the disc. While moving, it detects the desired track position on the disc. At the detected track position, laser light is incident on the pit recorded on the disc surface, and then the reflected light is detected through an optical system. Is a device that allows you to play

As such, in order to assemble the optical pickup actuator, an assembly device for holding and pressing various members of the optical pickup actuator is used because the size of the component is small and delicate, and FIG. 1 is a conventional disassembly of the optical pickup actuator. FIG. 2 is a perspective view of the conventional assembly of the fixed assembly of the optical pickup actuator, and the conventional fixed assembly configuration is inserted from the bottom of the base plate 32 constituting the optical pickup actuator, the base plate 32 and the objective lens. An objective lens is elastically installed on an upper surface of the base plate clamping member 38 and the base plate clamping member 38 to determine the installation position of the suspension 36 while preventing the front and rear and left and right movements of the holder 34. While pressing the upper surface of the holder 34 elastically and vertically with the laser beam through-hole 40 in between. The objective lens holder pressing member 46 for preventing the objective lens holder 34, which is installed between the inner yoke 42, which is installed upright, from being lifted when soldering the end of the suspension 36, is separated up and down. Shown in the state shown.

Thus, the base plate holding member 38 has a constant height at a predetermined position on the upper surface, and positioning ribs 48 having the same length as the width of the coil mounting portion 34a on the objective lens holder 34 are protruded at both ends in the longitudinal direction. The objective lens holder mounting plate 50 is integrally formed, and is inserted from the bottom of the laser beam passing hole 40 formed on the base plate 32 from the center of the upper surface of the objective lens holder mounting plate 50. A main plate 54 protruding from the flow preventing boss 52 having a predetermined height to prevent the plate 32 and the objective lens holder 34 from flowing, and a constant upward direction from both ends of the main plate 54. It is bent by the height, and the front surface shows a structure consisting of a pair of suspension support plates 58, 58 'with a predetermined number of suspension fitting holes 56 formed in accordance with the installation position of the suspension 36.

On the other hand, the objective lens holder calling member 46 is bent downward by a predetermined portion of one end of the hexahedral plate 60 having a certain size fixed to the upper surface of the one side suspension support plate 58 by a screw 62 And branched by a predetermined length of the other end to both sides, and the end portion is bent downward so that the upper surface side of the objective lens holder 34 can be elastically pressed.

Looking at the assembly process of the conventional optical pickup actuator fixed assembly device configured as described above, the flow prevention boss on the objective lens holder mounting plate 50 formed on the upper surface of the main plate 54 constituting the base plate holding member 38 ( A pair of suspension support plates 58 (52) are inserted into the laser beam passing holes 40 on the base plate 32 from the bottom and bent upwards from both ends of the main plate 54 ( 58 '), both outer yokes 42' on the base plate 32 are sandwiched so that the front, rear and left and right flows of the entire base plate 32 including the inner and outer yokes 42 and 42 ' Is prevented.

In this state, when the objective lens holder 34 having the objective lens 78 mounted on the image is sandwiched between the respective inner yokes 42 on the base plate 32, the objective lens holder pressing member 46 is placed on the one side. The upper surface of the objective lens holder 34 is elastically pressed by fixing the screw 80 on the upper surface of the suspension support plate 58 to prevent the objective lens holder 34 and the base plate 32 from flowing. .

However, as described above, in order to fix the base plate and the objective lens holder on the base plate clamping member, the overall assembly is achieved by frequently fastening or disassembling the objective lens holder pressing member that presses the objective lens holder from the upper surface with two screws. And workability was deteriorated,

The present invention has been made in view of this point, and the circular plate spring and plate protruding in the upper fixing jig when the objective lens holder of the optical pickup actuator is placed in the upper fixing jig, and the upper fixing jig is fitted into the lower fixing jig. The objective is to fix the objective lens holder quickly and accurately by fixing the objective holder using a spring.

This objective is provided between a base plate having a through hole formed in the center of the inner and outer yokes, and an objective lens disposed between the inner yoke of the base plate and an objective lens placed on the upper side of the fitting hole and a pressing surface formed on the bottom surface thereof. In the optical pickup actuator provided with a holder, the inclined groove inclined to one side is formed on the upper surface, the lower fixing jig formed with a plurality of mounting grooves on the side wall surface of the inclined groove, and fixed to the inclined groove of the lower fixing jig The upper fixing jig formed with a plurality of fixing projections on the side portion is inserted into the mounting defect of the lower fixing jig, and the upper center jig is formed in the upper center of the bottom edge of the base plate, and the fixing screw is fastened to the bottom of the center of the upper fixing jig. Up and down moving pieces fixed by the support plate and moving up and down according to the pressing action, and the up and down A spring for pushing the east side to the bottom surface, a circular plate spring coupled to the pressing protrusion of the shanghai east side and fitted into the fitting hole of the objective lens holder to be enlarged by upward movement of the up and down moving pieces to fix the objective lens holder; It is achieved by providing an assembling apparatus of an optical pickup actuator which is fixed by a fastening screw inside the bottom surface of the upper fixing jig and is opened by an upward movement of the up and down moving pieces to constitute a plate spring for pressing and holding the pressing piece of the objective lens holder.

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

As shown in Figures 3 to 6, the configuration of the present invention is the inner and outer yoke (91, 92) is bent upward to the base plate 90, the through-hole 93 is formed in the center; The objective lens holder 80 is installed between the inner yoke 91 of the base plate 90 and the objective lens 78 is placed on the fitting hole 81 and the pressing surface 82 is formed on the bottom surface of the base plate 90. In the optical pickup actuator, the inclined groove 161 which is inclined to one side is formed on the upper surface, the lower fixing jig 160 formed with a plurality of mounting grooves 162 on the side wall surface of the inclined groove 161, A plurality of fixing protrusions 170 formed in the side portion to be fixed to the inclined groove 161 of the lower fixing jig 160 is fitted into the mounting groove 162 of the lower fixing jig 160 and the base plate 90 at the upper center. The upper fixing jig 100 and the center of the upper fixing jig 100 is formed with a recess 102 is formed in the bottom edge 94 of the The upper and lower movable pieces 140 and the upper and lower movable pieces 140 which are fixed by the supporting plate 150 fastened by the fixing screw 151 to the bottom and move up and down according to the pressing action, and push the upper and lower movable pieces 140 to the bottom surface. The main body is coupled to the spring 130 and the pressing protrusion 141 of the shanghai east piece 140, and is fitted into the fitting hole 81 of the objective lens holder 80, thereby moving up and down by the up and down moving pieces 140. The circular plate spring 110 which is extended to fix the objective lens holder 80 and the bottom of the upper fixing jig 100 is fixed by the fastening screw 121 to be moved upward and downward by the moving piece 140. It is composed of a leaf spring 120 which is opened to press-fix the pressing surface 82 of the objective lens holder 80.

In addition, the fixing protrusion 170 installed on the side of the upper fixing jig 100 is configured to exert an elastic force forward by the spring 171 installed in the fixing groove 105.

In addition, the circular plate spring 110 is coupled to the pressing protrusion 141 of the upper and lower moving pieces 140 by the rivets 112, when the upper and lower moving pieces 140 are pressed upwards, the circular part 111 ) Is configured to expand in a circle.

In addition, the leaf spring 120 has a curved surface 122 is formed at the end of the image. When the lower moving piece 140 is pressed to the left and right are configured to spread.

When the upper fixing jig 100 is separated from the inclined groove 161 of the lower fixing jig 160, the upper and lower moving pieces 140 are moved downward by the spring 130 to move up and down. The stepped portion 142 of the piece 140 is in a state of being caught by the catching groove 103 of the support plate 150, and the circular plate spring 110 is pulled downward as the upper and lower movable pieces 140 are moved downward. Since the circular portion 111 of the circular plate spring 110 is hung on the outside, it is in a closed state, and the plate spring 120 is also configured to be in the center by the elastic force.

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

First, if the base plate 90 and the objective lens holder 80 is to be fixed to the upper fixing jig 100, the bottom edge 94 of the base plate 90 is recessed 102 of the upper fixing jig 100. When placed in the base plate 90, the fixing holes 95 of the base plate 90 are fitted into the circular projections 101 of the upper fixing jig 100, respectively, and the base plate 90 is prevented from rotating on the upper fixing jig 100. It is enshrined in the state that it was.

Then, the fitting hole 81 of the objective lens holder 80 is moved through the circular plate spring 100 which is moved by moving the objective lens holder 80 between the two inner yokes 91 of the base plate 90. The plate spring 120, which is inserted and pinched, is also located between the pressing surfaces 82 of the objective lens holder 80.

In this state, the inclined groove of the upper fixing jig 100, the lower fixing jig 160

When the pressure is gradually pushed from the upper portion 161 into the lower portion 161, the fixing protrusions 170 formed on both sides of the upper fixing jig 150 are compressed when the spring 171 is compressed.

As the upper fixing jig 100 is completely fitted into the inclined groove 161 of the lower fixing jig 160, the fixing protrusion 170 that is compressed as shown in FIG. 5 is elastic by the spring 171. The upper fixing jig 100 is firmly coupled to the lower fixing jig 160 while being fitted into the mounting groove 162 formed on the sidewall surface of the inclined groove 161.

At this time, as the upper fixing jig 100 is fixed to the lower fixing jig 160, the upper and lower moving pieces 140 protruding a predetermined distance to the bottom of the upper fixing jig 100 while forcibly compressing the spring 130. It is moved to the same height as the support plate 150, and the circular portion 111 of the circular plate spring 110 coupled to the rivet 112 on the shanghai east side (1 40) is enlarged in a circle, to the center The leaf spring 120 that has been retracted is also opened in the left and right directions by the pressing action of the up and down moving pieces 140.

As the circular plate spring 110 and the plate spring 120 are thus opened, the circular portion 111 of the circular plate spring 110 is tightly fitted to the fitting hole 81 of the objective lens holder 80, and the plate Since the curved surface 122 of the spring 120 is also in a state of firmly pressing the pressing surface 82 of the objective lens holder 80, the objective lens holder 80 is firmly fixed on the upper adjustment jig 100. .

On the other hand, as the objective lens holder 80 is fixed, the base plate 90 located on the bottom surface is also firmly fixed in a state where the flow is prevented, and the objective lens on the fitting hole 81 of the objective lens holder 80 The 78 is molded into a bond bond, and in addition to assembling various components such as wire, in this case, the reason for installing the upper fixing jig 100 inclined to the lower fixing jig 160 is the upper fixing jig 100 This is because assembling is easy when the wire coupled to the objective lens holder 80 fixed to the plate is inclined.

And, if you want to separate the objective lens holder 80, through the above reverse process, that is, if the upper fixing jig 100 is forcibly disengaged from the lower fixing jig 160, the pressed up and down moving piece ( The circular plate spring 110 and the plate spring 120 are in a closed state as the 140 is moved downward while restoring the elastic force by the spring 130.

Therefore, unlike the conventional objective lens holder fixing device that the assembly and productivity are significantly reduced by disassembling or combining a plurality of fastening screws frequently, the assembly apparatus according to the present invention is placed in the lower fixing jig inclined groove of the upper fixing jig. The upper and lower movable pieces move upward, and the circular plate springs and the plate springs, which are enclosed, are tightly coupled to the fitting hole and the pressing surface of the objective lens holder to fix the objective holder simply and accurately, and the objective lens holder is very It is a very useful invention that can be firmly fixed to significantly improve the assembly and workability of the optical pickup actuator.

Claims (2)

The inner and outer yokes 91 and 92 are bent upwards and are installed between the base plate 90 having the through hole 93 formed at the center thereof and the inner yoke 91 of the base plate 90. In the optical pickup actuator in which the objective lens 78 is placed on the ball 81 and the pressing surface 82 is formed on the bottom surface, an inclined groove 161 is formed on the top surface and is inclined to one side, and the inclined groove 161 is formed. A lower fixing jig 160 having a plurality of mounting grooves 162 formed at a side wall surface of the lower fixing jig 160, and a plurality of fixing protrusions 170 formed at the side surface thereof to be fixed to the inclined groove 161 of the lower fixing jig 160. An upper fixing jig 100 and an upper fixing jig, which are inserted into a mounting flaw 162 of the lower fixing jig 160, and having a recess 102 formed in the upper edge of the base plate 90. In accordance with the pressing action is fixed by the backing plate 150 is fastened by a fixing screw 151 to the bottom of the center of the (100) Up and down moving piece 140 to move up and down, the spring 130 for pushing the up and down moving piece 140 to the bottom, and coupled to the pressing stone 141 of the Shanghai East piece 140 The circular plate spring 110 and the upper fixing jig which are inserted into the fitting hole 81 of the objective lens holder 80 and expanded by the upward movement of the up and down moving pieces 140 to fix the objective lens holder 80. The leaf spring 120 which is fixed by the fastening screw 121 inside the bottom of the bottom surface 100 and is opened by the upward movement of the vertical moving piece 140 to press-fit the pressing surface 82 of the objective lens holder 80. Assembly apparatus for an optical pickup actuator, characterized in that consisting of. According to claim 1, wherein the fixing projections 170 which are installed on the side of the upper fixing jig 100 is characterized in that configured to exert an elastic force forward by the spring 171 installed in the fixing groove 105 Assembly device for pickup actuator.