KR0158847B1 - A pressing and inserting device for wobble correction of turntable assembly for optical disk driving - Google Patents

Abstract

The present invention relates to a precision error-correction press-fit device of a turntable for an optical device, and a body 70 having various devices built therein, a support member 80 for supporting the body 70, and a bottom of the support member 80. In the press-fitting device consisting of a support member 90 which is supported by the surface, the mounting portion 131 is formed on the bottom surface of the main body 70 and one side is opened so that the spindle motor 150 is detachable, the settlement portion A fixing member 130 having a precision jig groove 132 on which the front jig 151 of the spindle motor 150 is mounted is disposed on the bottom surface of the spindle motor 150, and placed on the settled portion 131 of the fixing member 130. A moving member 140 in which the first step motor 120 for pressing and rotating the spindle motor 150 is fixed by the fastening screw 122, and the moving member 140 in which the first step motor 120 is placed. The first hydraulic cylinder 100 for moving the lower and the second hydraulic cylinder 110 for moving the fixing member 130 up and down and A plurality of first light sensor 170 is installed on the bottom surface of the fixing member 130 to detect the inclination angle of the spindle motor 150, and is installed on the support member 90 and has a circular cross section at the center thereof. A pedestal 190 having a hollow portion 191 formed thereon, a turntable fixing member 230 installed at the hollow portion 191 of the pedestal 190 and having the turntable assembly A disposed on an upper surface thereof, and fixing the turntable. A second step motor 220 installed in the space 234 of the member 230 and fitted into the press-fit hole 10a of the turntable assembly A fixing member 10 to rotate the turntable assembly A; In order to measure the inclination angle of the turntable assembly A, the second optical sensor 200 installed in the bottom pedestal 190 of the support member 30 and the contact sensor for controlling the downward movement of the fixing member 130 ( 181 is a turntable for an optical device, characterized in that consisting of the support 180 is installed on the upper surface Precision Error Correction indentation device, which minimizes the coupling error between the assembly of the spindle motor and the turntable.

Description

Precision Error Correction Press-fit Device for Turntables for Optical Instruments

1 is a perspective view of a typical turntable assembly.

2 is a cross-sectional view of a typical turntable assembly.

3 is a block diagram of a precision error correction indentation apparatus according to the present invention.

Figure 4 is a cross-sectional view of the main part of the precision error correction indentation apparatus according to the present invention.

5 is a perspective view of a fixing member according to the present invention.

* Explanation of symbols for main parts of the drawings

A: turntable assembly 20: fixing member

20: pressing member 30: supporting member

40: drive motor 50: disk

60: spring 70: body

80: support member 90: support member

100: first hydraulic cylinder 110: second hydraulic cylinder

120: first step motor 130: fixing member

140: moving member 150: spindle motor

160: hydraulic spring 170: the first light sensor

180: support 190: support

200: second optical sensor 210: guide pin

220: second step motor 230: turntable fixing member

240: compression spring 250: fixed plate

270: operation button

The present invention relates to a device for press-fitting a turntable used in an optical device, in particular, in press-fitting a rotating shaft of a spindle motor to a holding member of a turntable assembly, by measuring the bending state of the turntable assembly and the installation state of the spindle motor with an optical sensor. The present invention relates to a precision error compensating indentation apparatus for turntables for optical devices, which minimizes the shaking of the turntable by injecting the rotating shaft of the spindle motor into the turntable assembly at the position where the step motor is driven to minimize the coupling error.

In general, optical devices (for example, CD, CDEG, LDP) and the like mounted disc (DISC) in which various audio signals or video signals are input in the optical device, and rotates the disk using a turntable, By reproducing the signal through the optical pickup device is a playback device that allows the user to listen to the audio signal or to watch the video signal.

Looking at the configuration of the turntable assembly (A) in which the disk 50 is placed, Figure 1 is an exploded perspective view of a general turntable assembly (A), Figure 2 is a cross-sectional view of the combined state of the turntable assembly (A), the bottom of the circular cross section The indentation hole 10a is formed, the upper surface of the circular body 10c is formed with a recess 10d in the center and the fixing member formed with a plurality of inserting holes 10e around the outer lower end of the circular body 10c ( 10) and a plurality of hook hooks 20a fitted to the insertion hole 10e of the fixing member 10 are formed at the bottom thereof, and are inserted into the outer circumferential surface of the circular body 10c to move up and down. 20 and a support member 30 on which the disc 50 is seated by forming a bent portion 30a, which is attached to the outer circumferential lower end of the fixing member 10 and bent upwards, to which the disk 50 is placed, and the fixing member ( 10) is installed in the bottom of the settlement groove (10b) and the pressing member 20 of the bottom of the outer bottom. The turntable assembly (A) having a spring (60) for providing an elastic force to the air pressing member (20) and a rotating shaft (40a) press-fitted into the pressing hole (10a) of the fixing member (10). It consists of a spindle motor 40 to rotate.

In addition, an inserting groove 20b and a settling groove 10b are formed on the bottom surface of the pressing member 20 and the upper surface of the fixing member 10 so that the spring 60 is accurately coupled without flow.

In addition, the support member 30 is a metal material manufactured by press working, and the fixing member 10 is a plastic material produced by injection molding, and the support member 30 is out-molded on the outer circumferential surface of the fixing member 10. It is composed by (OUTSERT MOLDING).

As described above, the rotary shaft 40a of the driving motor 40 is forcibly pressed into the press-in hole 10a of the turntable assembly A fixing member 10, and the press-fit device of the conventional turntable assembly A is assembled. Jig (jig) is set to hold the outer peripheral surface of the drive motor 40, a magnetic chuck (electrical chuck) for holding the support member 30 of the turntable assembly (A) is mounted on the top.

In this state, the jig and the magnetic chuck are moved up and down with each other, and the rotary shaft 40a of the driving motor 40 fixed thereto is forcibly pressed into the indentation hole 10a of the turntable A to be assembled.

However, in the related art, since the jig of the drive motor 40 is fixed to the outer part of the drive motor 40 instead of the precision jig part, the center is not properly held, and there is a possibility of error, and the turntable assembly A is located on the upper side. ) Is fixed using a magnetic chuck, so that the press-fit hole 10a of the fixing member 10, which is the reference of the vibration of the turntable assembly A, cannot be squeezed, so that the vibration of the turntable assembly A after assembly is There has been a problem such that the sound quality reproduction power of the disk is reduced.

On the other hand, in order to solve the above problems, a device has been proposed in which the turntable assembly is placed on the pedestal to correct the center with guide pins, and the spindle motor is mounted on the precision jig device to press the rotary shaft of the spindle motor into the turntable assembly to reduce the error. However, since the minimum error position of the turntable assembly and the spindle motor could not be accurately determined, the coupling error could not be precisely compensated.

The present invention has been made in view of this point, the spindle motor and the turntable assembly mounted in the holding member by measuring the inclination angle by the first and second optical sensor to rotate the first and second step motor to rotate the spindle motor The objective is to reduce the coupling error to a minimum by measuring and indenting the optimum error position of the and turntable assemblies.

This purpose is to provide a press-fitting device comprising a main body having various devices embedded therein, a supporting member for supporting the main body, and a supporting member for supporting the supporting member on the bottom surface, so that the spindle motor is attached to and detached from the bottom of the main body. One side is formed with a settled portion is formed, the bottom surface of the settled fixing member is formed with a true jig groove is mounted on the front jig of the spindle motor, the first step of pressing and rotating the spindle motor placed on the settled portion of the fixing member A moving member to which the motor is fixed by a fastening screw, a first hydraulic cylinder for moving the moving member on which the first step motor is placed downward, a second hydraulic cylinder for moving the fixing member up and down, and the fixing member A plurality of first optical sensors installed on the bottom surface and detecting the inclination angle of the spindle motor; A pedestal having a hollow section with a cross section, a turntable fixing member installed in the hollow portion of the pedestal, the turntable assembly being placed on an upper surface, and installed in a space of the turntable fixing member and fitted into a press-fit hole of the turntable assembly fixing member, A second step motor for rotating the turntable assembly, a second light sensing sensor installed in the bottom support of the base member for measuring the inclination angle of the turntable assembly, and a contact sensor for controlling the downward movement of the fixing member are provided on the upper surface. It is achieved by providing a precision error correction indentation device for a turntable for optics composed of installed supports.

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

As shown in Figures 3 to 5, the configuration of the present invention, the main body 70 is built in a variety of devices, the support member 80 for supporting the body 70, and the support member 80 In the press-fitting device consisting of a support member 90 supporting the bottom from the bottom, is installed on the bottom surface of the main body 70 is formed with a settled portion 131, one side is opened so that the spindle motor 150 is detachable, A fixing member 130 having a precision jig groove 132 on which the front jig 151 of the spindle motor 150 is mounted is formed on the bottom of the mounting part 131, and the mounting part 131 of the fixing member 130. A moving member 140 in which the first step motor 120 is rotated by pressing the spindle motor 150 placed therein and is fixed by the fastening screw 122, and a moving member in which the first step motor 120 is placed. The first hydraulic cylinder 100 for moving the lower portion 140, the second hydraulic cylinder 110 for moving the fixing member 130 up and down, and the fixing member 130 A plurality of first light sensor 170 is installed on the bottom surface to detect the inclination angle of the spindle motor 150, and the hollow portion 191 of the circular cross section is formed on the support member 90 and the center is formed The turntable fixing member 230 is installed on the pedestal 190, the hollow portion 191 of the pedestal 190 and the turntable assembly A is placed on the upper surface, and the space portion of the turntable fixing member 230 ( 234 is installed in the turntable assembly A and the second step motor 220 is inserted into the press-fit hole (10a) of the fixing member 10 to rotate the turntable assembly (A), and the inclination angle of the turntable assembly (A) The second light detection sensor 200 is installed in the bottom support 190 to support the member 30 and the contact sensor 181 for controlling the downward movement of the fixing member 130 is installed on the upper surface to measure the It is composed of 180.

The turntable fixing member 230 has an annular protrusion 233 into which the fixing member 10 of the turntable assembly A is fitted, and a guide slot 232 penetrating up and down in the center thereof. In the bottom of the guide slot 232, a large diameter portion 234 is formed, and a guide bearing 231 is formed on the wall surface of the guide slot 232 and the space portion 234.

The flexible chuck 123 which is pressed against the rear jig 152 of the spindle motor 150 is attached to the end of the rotation shaft 121 of the first step motor 120.

The back surface of the first step motor 120 measures the pressure of the first hydraulic cylinder 100 by applying a friction force enough to rotate the spindle motor 150 by the flexible chuck 124 of the first step motor 120. It is configured by installing a load cell 101 on the bottom of the moving member 140.

In addition, a hydraulic spring 160 is installed at the bottom edge of the fixing member 131 to return the moving member 140 moved downward by the first hydraulic cylinder 100.

A guide pin 210 that is splined to the rotation shaft 221 of the second step motor 220 and is moved up and down by a bearing 231 and fitted into a press-fit hole 10a of the turntable assembly A; Pedestal for supporting the bottom surface of the second step motor 220 and the pressing plate 260 which moves up and down by the compression spring 240 and the compression spring 240 and the turntable fixing member 230 from the bottom surface. It is configured to be coupled to the 190 and the fixing screw 252.

In addition, the first light sensor 170 and the second light sensor 200 are installed in two symmetrical directions, respectively, and store the maximum tilt angle Q 'min measured while the spindle motor 150 rotates once. Also, the maximum inclination angle (Q max) and the minimum inclination angle (Q min) measured while rotating the turntable assembly A are stored, and then the absolute value of Q'max + Q min and Q 'min + Q max The absolute values are compared to determine the rotation angles of the spindle motor 150 and the turntable assembly A at the position where the coupling error is minimum.

Thus, the operation and effects of the present invention configured will be described.

First, when the fixing member 10 of the turntable assembly A is inserted into the annular protrusion 233 of the turntable fixing member 230, the end of the guide pin 210 receiving the elasticity of the compression spring 240 is fixed to the fixing member ( When the state enters the indentation hole 10a of 10), the second step motor 220 is rotated to rotate the guide pin 210 and the two second light detecting sensors 200 of the turntable assembly A The maximum inclination angle (Q max) and the minimum inclination angle (Q min) are measured and stored.

Then, the spindle motor 150 enters into the settled portion 131 through the open one side of the fixing member 130, and the front jig 151 is mounted in the state of being fitted into the precision jig groove 132, and then the first The hydraulic cylinder 100 is lowered to allow the flexible chuck 123 of the first step motor 120 to press-fit the back fixture 152 of the spindle motor 150, and the friction force through the load cell 101. Adjust the pressure until it is appropriate.

In this state, when the first step motor 120 is rotated one time, the first inclination angle Q 'min and the minimum inclination angle of the spindle motor 150 are measured and stored by the two first light sensing sensors 170. .

As described above, when the absolute value of the input Q'max + Qmin and the absolute value of Q 'min + Q max are compared with each other, the coupling error of the turntable assembly A and the spindle motor 150 becomes the minimum position. The first and second step motors 120 and 220 are rotated until the turntable assembly A and the spindle motor 150 are stopped.

In addition, when the operation button 270 is pressed, the second hydraulic cylinder 110 is lowered downward so that the rotation shaft 153 of the spindle motor 150 is press-fitted into the press-in hole 10a of the turntable assembly A. As the pin 210 pushes the compression spring 240 downward, the coupling is completed.

At this time, the spindle motor 150 is completely coupled to the turntable assembly A while the bottom surface of the fixing member 130 touches the contact sensor 181 of the support 180, and the second hydraulic cylinder 110 is fixed. The member 130 is moved upward.

As such, after the assembly is completed, the spindle motor 150 coupled with the turntable assembly A may be removed from the settled portion 131 of the fixing member 130.

On the other hand, if you want to press the rotary shaft 153 of the other spindle motor 150 to the turntable assembly (A) is to repeat the above operation.

Therefore, unlike the conventional indentation apparatus, while rotating the spindle motor to the first step motor, the optimal tilt angle is measured by the first light sensor, and the turntable assembly is rotated to the second step motor while the second light sensor is optimal. It is a very useful invention to reduce the coupling error to the minimum by measuring the angle of inclination and comparing and analyzing the inclination values with each other to couple the rotating shaft of the spindle motor to the indentation hole of the turntable assembly.

Claims (6)

In the press-fitting device composed of a main body 70, which is equipped with various devices, a support member 80 for supporting the main body 70, and a support member 90 for supporting the support member 80 from the bottom surface, The settled portion 131 is installed at the bottom of the main body 70 and is open at one side thereof so that the spindle motor 150 is detachable. The front fixture portion of the spindle motor 150 is formed at the bottom of the settled portion 131. The first step motor for pressing and rotating the fixed member 130 is formed with a precision jig groove 132 to be mounted 151, and the spindle motor 150 placed in the settled portion 131 of the fixing member 130 ( 120 is moved member 140 is fixed to the fastening screw 122, the first hydraulic cylinder 100 for moving the moving member 140, the first step motor 120 is settled downward, and the fixed A plurality of second hydraulic cylinder 110 for moving the member 130 up and down, and a plurality of installed on the bottom surface of the fixing member 130 is inclined of the spindle motor 150 A first light sensor 170 for detecting an angle, a pedestal 190 installed on the support member 90 and having a hollow portion 191 having a circular cross section at a central portion thereof, and a hollow portion of the pedestal 190. The turntable fixing member 230 installed on the first surface of the turntable assembly A and the turntable assembly A is installed in the space 234 of the turntable fixing member 230, and the turntable assembly A fixing member 10. The second step motor 220 is inserted into the indentation hole (10a) of the) to rotate the turntable assembly (A), and the base pedestal (190) of the support member (30) to measure the inclination angle of the turntable assembly (A) The second optical sensor 200 is installed in the inside, and the contact sensor 181 for controlling the downward movement of the fixing member 130 of the turntable for the optical device, characterized in that composed of the support 180 is installed on the upper surface Precision error correction indentation device. According to claim 1, The turntable fixing member 230 has an annular protrusion 233 is formed in the upper portion is inserted into the fixing member 10 of the turntable assembly (A), the guide slot 232 penetrated up and down in the center Is formed, and a space portion 234 having a large diameter is formed at the bottom of the guide slot 232, and a guide bearing 231 is formed on the wall of the guide slot 232 and the space portion 234. Precision error correction press-fit device for turntables for optical instruments. The optical chuck 123 of claim 1, wherein a flexible chuck 123 is pressed to the rear jig 152 of the spindle motor 150 at an end of the rotation shaft 121 of the first step motor 120. Precision error correction indentation device for turntable for equipment. According to claim 1 or 3, wherein the flexible chuck 124 of the first step motor 120 to apply a friction force to rotate the spindle motor 150 to measure the pressure of the first hydraulic cylinder (100) Precision error correction press-fit device of the turntable for an optical device, characterized in that the load cell 101 is installed on the bottom of the moving member 140 on the back of the first step motor (120). The method of claim 1, wherein the hydraulic spring 160 is installed on the bottom edge of the fixing member 131 to return the moving member 140 moved downward by the first hydraulic cylinder (100). Precision error correction press-fit device for turntables for optical instruments. The guide pin of claim 1, wherein the guide pin is splined to the rotation shaft 221 of the second step motor 220 and moved up and down by the bearing 231 and fitted into the press-fit hole 10a of the turntable assembly A. And a pressing plate 260 supporting the bottom of the second step motor 220 and moving up and down by the compression spring 240, and the compression spring 240 and the turntable fixing member 230. Precision error correction press-fit device of the turntable for optical apparatus, characterized in that consisting of a fixing plate 250 is coupled to the pedestal 190 and the fixing screw 252 for fixing at the bottom.