Edge searching mechanism for liquid crystal square sheet detection equipment

Abstract

The utility model discloses an edge searching mechanism for liquid crystal square sheet detection equipment, and relates to the technical field of semiconductor processing equipment, the edge searching mechanism comprises a bottom plate, a support, a detection unit, an X-axis moving mechanism, a Y-axis moving mechanism, a driving part and a rotary table, the support is fixedly arranged on the bottom plate, the detection unit is fixedly arranged on the support, the X-axis moving mechanism is arranged on the bottom plate, and the Y-axis moving mechanism is arranged on the rotary table. The Y-axis moving mechanism is arranged on the X-axis moving mechanism, the driving component is arranged on the Y-axis moving mechanism, the rotary table is arranged on the driving component, and a plurality of adsorption grooves are formed in the rotary table. The rotary table drives the liquid crystal square sheet to rotate, and in the rotating process of the liquid crystal square sheet, the X-axis moving mechanism and the Y-axis moving mechanism can drive the rotary table to slowly and freely move on the horizontal plane, so that the edge of the liquid crystal square sheet is always located below the detection unit in the rotating process, and edge searching detection on the liquid crystal square sheet is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of semiconductor processing equipment, in particular to an edge finding mechanism for a liquid crystal square wafer detection device. BACKGROUND

[0002] Liquid crystal square wafers are LED chip finished products for liquid crystal display technology after strict screening and classification, and the materials involved mainly include glass substrates, liquid crystals, polarizing sheets, etc.

[0003] The existing edge finding mechanism includes a detection unit and a suction cup. The wafer is adsorbed on the suction cup and rotates. Since the wafer is circular, the outer edge of the wafer is always located below the detection unit, so that edge finding detection can be performed. However, when detecting liquid crystal square wafers, the edges of the liquid crystal square wafers cannot always be located below the detection unit because the shape of the liquid crystal square wafers is quadrilateral, so that the edge finding mechanism cannot complete the edge finding work, affecting the detection effect of the liquid crystal square wafers. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the problem that the edge finding mechanism cannot find the edges of the liquid crystal square wafers, the present application provides an edge finding mechanism for a liquid crystal square wafer detection device.

[0005] The edge finding mechanism for a liquid crystal square wafer detection device provided by the present application adopts the following technical solution:

[0006] An edge finding mechanism for a liquid crystal square wafer detection device, comprising a bottom plate, a support, a detection unit, an X-axis moving mechanism, a Y-axis moving mechanism, a driving component and a rotary table, the support is fixedly arranged on the bottom plate, the detection unit is fixedly arranged on the support, the X-axis moving mechanism is arranged on the bottom plate, the Y-axis moving mechanism is arranged on the moving end of the X-axis moving mechanism, the driving component is arranged on the moving end of the Y-axis moving mechanism, the rotary table is arranged on the driving end on the top of the driving component, the X-axis moving mechanism and the Y-axis moving mechanism are used to drive the rotary table to move on the horizontal plane, and a plurality of adsorption grooves are arranged on the rotary table and used to adsorb and fix the liquid crystal square wafers.

[0007] By adopting the above technical solution, the liquid crystal square wafers are placed on the rotary table, the liquid crystal square wafers are fixed by the adsorption grooves, the rotary table is driven to rotate by the driving component, the rotary table drives the liquid crystal square wafers to rotate, the X-axis moving mechanism and the Y-axis moving mechanism can drive the rotary table to move slowly and freely on the horizontal plane during the rotation of the liquid crystal square wafers, so that the edges of the liquid crystal square wafers are always located below the detection unit during the rotation, and the edge finding detection of the liquid crystal square wafers is facilitated.

[0008] Preferably, the X-axis moving mechanism comprises a first driving member, a first screw rod, a first sliding block, a first sliding seat, a first moving seat and a first mounting seat, the first mounting seat is fixedly arranged on the bottom plate, the first driving member is fixedly arranged on the first mounting seat, the first sliding seat is arranged on the first mounting seat, the first screw rod is rotatably arranged on the first sliding seat, the first sliding block is slidably arranged on the first sliding seat, the first screw rod is threaded through the first sliding block, the first moving seat is fixedly arranged on the first sliding block, the first moving seat is connected with the Y-axis moving mechanism, and the driving end of the first driving member is in transmission connection with the first screw rod.

[0009] By adopting the above technical scheme, the first driving member drives the first screw rod to rotate, the first screw rod drives the first sliding block to slide, the first sliding block drives the first sliding seat to slide, the first sliding seat drives the Y-axis moving mechanism to move through the first moving seat, so that the Y-axis moving mechanism can reciprocate along the X-axis on the horizontal plane, which facilitates the movement of the turntable driven by the Y-axis moving mechanism, and further facilitates the movement of the liquid crystal square wafer, thereby ensuring the completion of the edge searching operation of the detection equipment.

[0010] Preferably, the Y-axis moving mechanism comprises a second driving member, a second screw rod, a second sliding block, a second sliding seat, a second moving seat and a second mounting seat, the second sliding seat is fixedly arranged on the first moving seat, the second mounting seat is fixedly arranged on the second sliding seat, the second driving member is arranged on the second mounting seat, the second screw rod is rotatably arranged on the second sliding seat, the second sliding block is slidably arranged on the second sliding seat, the second screw rod is threaded through the second sliding block, the second driving member is in transmission connection with the second screw rod, and the second moving seat is arranged on the second sliding block.

[0011] By adopting the above technical scheme, the second driving member drives the second screw rod to rotate, the second screw rod drives the second sliding block to slide, the second sliding block drives the second sliding seat to slide, the second sliding seat drives the driving part to move through the second moving seat, so that the driving part can reciprocate along the Y-axis on the horizontal plane, which facilitates the movement of the turntable driven by the driving part, and further facilitates the movement of the liquid crystal square wafer, thereby ensuring the completion of the edge searching operation of the detection equipment.

[0012] Preferably, two reinforcing plates are arranged on the side wall of the second moving seat, and the two reinforcing plates are symmetrically arranged on the opposite side walls of the second moving seat in the horizontal direction.

[0013] By adopting the above technical scheme, the second moving seat is supported by the two reinforcing plates, so that the structure is more stable, and the movement operation of the Y-axis moving mechanism can be facilitated.

[0014] Preferably, a plurality of lifting pieces are arranged on the bottom plate, lifting ends of the plurality of lifting pieces are fixedly provided with lifting discs, the lifting discs are rotationally provided with rotating discs, four sliding grooves are equidistantly and circumferentially arranged on the lifting disc, a sliding rod is slidingly arranged in each sliding groove along the diameter direction of the lifting disc, a push block is fixedly arranged at the top end of each sliding rod, and the four push blocks are located at the four circumferential sides of the liquid crystal wafer respectively, four push grooves are equidistantly and circumferentially arranged on the rotating disc, the push grooves are obliquely arranged, the four sliding rods are slidingly arranged in the four push grooves respectively, and the four sliding rods correspond to the four push grooves one by one, and the lifting disc is provided with a third driving piece, a driving gear is arranged at the driving end of the third driving piece, and the driving gear is engaged with the outer side wall of the rotating disc.

[0015] By adopting the above technical scheme, when the third driving piece rotates forward, the third driving piece drives the driving gear to rotate, the driving gear drives the rotating disc to rotate, the rotating disc drives the four sliding rods to slide in the four sliding grooves through the four push grooves, and at the same time, the sliding rods also drive the push blocks to move towards the direction close to the center of the rotating disc. At this time, the four push blocks simultaneously abut against the circumferential side walls of the liquid crystal wafer and clamp the liquid crystal wafer, so that the placement position of the liquid crystal wafer can be calibrated. After calibration, the third driving piece reversely rotates, the push blocks move away from the liquid crystal wafer and reset, and the rotating disc is driven downward by the lifting piece, so that the push blocks do not affect the rotation of the liquid crystal wafer on the rotating table, and the stable completion of the edge searching operation is ensured.

[0016] Preferably, a limiting ring is coaxially and fixedly arranged on the top wall of the lifting disc, and the outer side wall of the limiting ring abuts against the inner side wall of the rotating disc.

[0017] By adopting the above technical scheme, the rotation of the rotating disc is limited by the limiting ring, so that the rotating disc is more stable during rotation.

[0018] Preferably, a guide block is fixedly arranged on the side wall of the sliding rod, a guide groove is arranged in the lifting disc, the guide groove and the sliding groove are in communication, and the guide block is slidingly arranged in the guide groove along the diameter direction of the lifting disc.

[0019] By adopting the above technical scheme, when the sliding rod slides in the sliding groove, the guide block moves in the guide groove, so that the sliding route of the sliding rod does not deviate when the sliding rod slides in the sliding groove, and the sliding rod can always move horizontally.

[0020] Preferably, the push block is a flexible block.

[0021] By adopting the above technical scheme, the push block clamps the liquid crystal wafer when calibrating the liquid crystal wafer, and the push block is arranged as a flexible block, so that the liquid crystal wafer can be prevented from being damaged due to extrusion.

[0022] To sum up, the present application includes at least one of the following beneficial technical effects:

[0023] 1. With the X-axis moving mechanism and the Y-axis moving mechanism, the rotary table drives the liquid crystal wafer to rotate, and in the process of rotating the liquid crystal wafer, the X-axis moving mechanism and the Y-axis moving mechanism can drive the rotary table to move slowly and freely on the horizontal plane, so that the edge of the liquid crystal wafer is always located below the detection unit during rotation, facilitating edge detection of the liquid crystal wafer;

[0024] 2. With the help of the reinforcing plates, the two reinforcing plates support the second moving seat, making the structure more stable and facilitating the movement of the Y-axis moving mechanism;

[0025] 3. By the four push blocks, when the third driving part rotates forward, the third driving part drives the driving gear to rotate, the driving gear drives the rotating disc to rotate, the rotating disc drives the four sliding rods to slide in the four sliding grooves through the four push grooves, and at the same time, the sliding rods also drive the push blocks to move towards the center of the rotating disc. At this time, the four push blocks simultaneously abut against the peripheral side wall of the liquid crystal wafer and clamp it, so as to calibrate the placement position of the liquid crystal wafer. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the edge searching mechanism in Embodiment 1 of the present application;

[0027] Figure 2 It is an exploded view of part of the edge searching mechanism in Embodiment 1 of the present application;

[0028] Figure 3 It is an exploded view of part of the edge searching mechanism in Embodiment 1 of the present application, which highlights the reinforcing plates;

[0029] Figure 4 It is a schematic diagram of the overall structure of the edge searching mechanism in Embodiment 2 of the present application;

[0030] Figure 5 It is an exploded view of part of the edge searching mechanism in Embodiment 2 of the present application;

[0031] Figure 6 It is a sectional view of part of the edge searching mechanism in Embodiment 2 of the present application.

[0032] Label: 1, bottom plate; 2, support; 3, detection unit; 4, X-axis moving mechanism; 41, first driving piece; 42, first screw rod; 43, first sliding block; 44, first sliding seat; 45, first moving seat; 46, first mounting seat; 5, Y-axis moving mechanism; 51, second driving piece; 52, second screw rod; 53, second sliding block; 54, second sliding seat; 55, second moving seat; 56, second mounting seat; 6, driving part; 7, rotary table; 8, adsorption groove; 9, reinforcing plate; 11, lifting piece; 12, lifting disc; 13, rotary disc; 14, sliding rod; 15, sliding groove; 16, push groove; 17, push block; 18, third driving piece; 19, driving gear; 20, limiting ring; 21, guide block; 22, guide groove. DETAILED DESCRIPTION

[0033] The following will be described in detail in combination with the accompanying Figures 1-6 The application is further described in detail.

[0034] The application discloses a side searching mechanism for a liquid crystal square wafer detection device.

[0035] Embodiment 1:

[0036] Referring to Figure 1 , Figure 2 and Figure 3 , a side searching mechanism for a liquid crystal square wafer detection device comprises a bottom plate 1, a support 2, a detection unit 3, an X-axis moving mechanism 4, a Y-axis moving mechanism 5, a driving part 6 and a rotary table 7. The support 2 is fixedly installed on the top wall of the bottom plate 1 and is located at one end of the bottom plate 1 in the length direction. The detection unit 3 is fixedly installed on the top end of the support 2. In the application, the detection unit 3 can be a side searching camera.

[0037] The X-axis moving mechanism 4 is installed on the top wall of the bottom plate 1. The Y-axis moving mechanism 5 is installed on the translation end of the X-axis moving mechanism 4. The driving part 6 is installed on the translation end of the Y-axis moving mechanism 5. The rotary table 7 is fixedly installed on the driving end of the top of the driving part 6. In the application, the driving part 6 can be a servo motor. The top wall of the rotary table 7 is provided with an adsorption groove 8. The adsorption groove 8 is connected with an external air suction device.

[0038] The liquid crystal square wafer is placed on the rotary table 7. The adsorption groove 8 adsorbs and fixes the liquid crystal square wafer. The driving part 6 drives the rotary table 7 to rotate. The rotary table 7 drives the liquid crystal square wafer to rotate. In the process of rotating the liquid crystal square wafer, the X-axis moving mechanism 4 and the Y-axis moving mechanism 5 can drive the rotary table 7 to slowly and freely move on the horizontal plane, so that the edge of the liquid crystal square wafer is always located below the detection unit 3 in the process of rotating the liquid crystal square wafer, thereby enabling the side searching detection of the liquid crystal square wafer.

[0039] In the edge finding process, the X-axis moving mechanism 4 and the Y-axis moving mechanism 5 drive the rotary table 7 to move along the preset trajectory, and the detection unit 3 can detect the movement range of the liquid crystal wafer. If the movement trajectory of the liquid crystal wafer during the detection rotation exceeds the normal range, it indicates that the position of the liquid crystal wafer on the rotary table 7 has deviated. After the edge finding detection is completed, the X-axis moving mechanism 4 and the Y-axis moving mechanism 5 drive the liquid crystal wafer to correct the position through the rotary table 7.

[0040] An ID reader is installed in the detection unit 3, and each liquid crystal wafer has a different ID code. After the edge finding detection and position correction of the liquid crystal wafer are completed, the ID reader can read the ID code of the liquid crystal wafer, thereby facilitating production traceability.

[0041] Specifically, the X-axis moving mechanism 4 includes a first driving member 41, a first lead screw 42, a first sliding block 43, a first sliding seat 44, a first moving seat 45, and a first mounting seat 46. The first mounting seat 46 is fixedly installed on the bottom plate 1, and the first sliding seat 44 and the first driving member 41 are both fixedly installed on a side wall of the first mounting seat 46. The first sliding block 43 is slidingly installed on a top wall of the first sliding seat 44 along the length direction of the first sliding seat 44, and the first lead screw 42 is rotatably installed on the first sliding seat 44 and threadedly penetrates through the first sliding block 43. The first lead screw 42 is in synchronous belt transmission connection with the driving end of the first driving member 41. The first moving seat 45 is fixedly installed on a top wall of the first sliding block 43, and the Y-axis moving mechanism 5 is installed on the first moving seat 45.

[0042] The first driving member 41 can drive the first lead screw 42 to rotate through the synchronous belt, the first lead screw 42 drives the first sliding block 43 to slide on the first sliding seat 44, the first sliding block 43 drives the first moving seat 45 to slide, the first moving seat 45 drives the Y-axis moving mechanism 5 to slide, and then the rotary table 7 is driven to move through the driving component 6. Thus, the liquid crystal wafer can reciprocate along the X-axis direction on the horizontal plane.

[0043] The Y-axis moving mechanism 5 includes a second driving member 51, a second lead screw 52, a second sliding block 53, a second sliding seat 54, a second moving seat 55, and a second mounting seat 56. The second sliding seat 54 is fixedly installed on the first moving seat 45, and the second mounting seat 56 is fixedly installed on one end of the second sliding seat 54 in the horizontal direction. The second driving member 51 is fixedly installed on a side wall of the second mounting seat 56, and the second lead screw 52 is rotatably installed on a side wall of the second sliding seat 54. The second lead screw 52 is in synchronous belt transmission connection with the driving end of the second driving member 51. In the present application, the first driving member 41 and the second driving member 51 can both be selected as a servo motor.

[0044] The second sliding block 53 is slidingly installed on the side wall of the second sliding seat 54, the second lead screw 52 is threaded through the second sliding block 53, the second moving seat 55 is fixedly installed on the side wall of the second sliding block 53, and the driving component 6 is fixedly installed on the second moving seat 55. The second moving seat 55 is fixedly installed with the reinforcing plates 9 on the opposite sides in the horizontal direction, and the second moving seat 55 is supported by the two reinforcing plates 9, so that the structure is more stable.

[0045] The second driving component 51 can drive the second lead screw 52 to rotate through the synchronous belt, the second lead screw 52 drives the second sliding block 53 to slide on the second sliding seat 54, the second sliding block 53 drives the second moving seat 55 to slide, the second moving seat 55 drives the driving component 6 to slide, and then drives the turntable 7 to move, so that the liquid crystal wafer can reciprocate in the Y-axis direction on the horizontal plane.

[0046] The X-axis moving mechanism 4 and the Y-axis moving mechanism 5 are used in cooperation, so that the liquid crystal wafer can freely move on the horizontal plane, and then the driving component 6 drives the liquid crystal wafer to rotate, so that the edge of the liquid crystal wafer is always located below the detection unit 3 during the rotation.

[0047] The implementation principle of the edge searching mechanism of the liquid crystal wafer detection device is as follows: the liquid crystal wafer is placed on the turntable 7, the adsorption groove 8 adsorbs and fixes the liquid crystal wafer, the driving component 6 drives the turntable 7 to rotate, and the turntable 7 drives the liquid crystal wafer to rotate. During the rotation of the liquid crystal wafer, the first driving component 41 can drive the first lead screw 42 to rotate through the synchronous belt, the first lead screw 42 drives the first sliding block 43 to slide on the first sliding seat 44, the first sliding block 43 drives the first moving seat 45 to slide, the first moving seat 45 drives the Y-axis moving mechanism 5 to slide, and then the driving component 6 drives the turntable 7 to move, so that the liquid crystal wafer can reciprocate in the X-axis direction on the horizontal plane. The second driving component 51 can drive the second lead screw 52 to rotate through the synchronous belt, the second lead screw 52 drives the second sliding block 53 to slide on the second sliding seat 54, the second sliding block 53 drives the second moving seat 55 to slide, the second moving seat 55 drives the driving component 6 to slide, and then drives the turntable 7 to move, so that the liquid crystal wafer can reciprocate in the Y-axis direction on the horizontal plane. The X-axis moving mechanism 4 and the Y-axis moving mechanism 5 are used in cooperation, so that the liquid crystal wafer can freely move on the horizontal plane, and then the driving component 6 drives the liquid crystal wafer to rotate, so that the edge of the liquid crystal wafer is always located below the detection unit 3 during the rotation, so that the liquid crystal wafer can be edge searched and detected.

[0048] Embodiment 2:

[0049] With reference to Figure 4 , Figure 5 and Figure 6The difference between the embodiment 2 and the embodiment 1 of the application lies in that four lifting pieces 11 are fixedly installed on the top wall of the base plate 1, lifting discs 12 are fixedly installed on the lifting ends of the top portions of the four lifting pieces 11, limit rings 20 are coaxially fixedly installed on the top walls of the lifting discs 12, rotating discs 13 are coaxially rotatably installed on the top walls of the lifting discs 12, and the inner side walls of the rotating discs 13 abut against the outer side walls of the limit rings 20. The lifting discs 12 and the rotating discs 13 are both hollow, the diameter of the lifting disc 12 is greater than that of the rotating disc 13, and the lifting disc 12 and the rotating disc 13 are located outside the rotating table 7. In the application, the lifting piece 11 can be a pneumatic cylinder, and the lifting piece 11 can drive the lifting disc 12 and the rotating disc 13 to move up and down.

[0050] A third driving piece 18 is fixedly installed on the top wall of the lifting disc 12 through a mounting frame, a driving gear 19 is fixedly installed on the driving end of the bottom portion of the third driving piece 18, and in the application, the third driving piece 18 can be a servo motor. The outer periphery of the rotating disc 13 is formed with a gear body, and the driving gear 19 is engaged with the outer side wall of the rotating disc 13. The third driving piece 18 can drive the rotating disc 13 to rotate on the lifting disc 12 through the driving gear 19.

[0051] Four sliding grooves 15 are equidistantly formed on the lifting disc 12 along the circumferential direction of the lifting disc 12, each sliding groove 15 is formed along the diameter direction of the lifting disc 12, guide grooves 22 are formed on the two side walls of the lifting disc 12 in the width direction of each sliding groove 15, a sliding rod 14 is slidingly installed in each sliding groove 15 of the lifting disc 12, and a push block 17 is fixedly installed at the top end of each sliding rod 14. In the application, the push block 17 can be made of a flexible block of rubber material.

[0052] Each sliding rod 14 is symmetrically fixedly installed with a guide block 21, the two guide blocks 21 are slidingly installed in the two guide grooves 22 along the diameter direction of the lifting disc 12, the guide block 21 slides in the guide groove 22, thereby guiding the sliding of the sliding rod 14, so that the sliding of the sliding rod 14 in the sliding groove 15 is more stable. Four push grooves 16 are equidistantly formed on the rotating disc 13 along the circumferential direction of the rotating disc 13, each push groove 16 is obliquely formed, the four push grooves 16 correspond to the four sliding grooves 15 one by one, and the four sliding rods 14 are slidingly installed in the four push grooves 16.

[0053] The implementation principle of the embodiment 2 of the application is as follows: after the liquid crystal wafer is placed on the turntable 7, the third driving member 18 rotates forward, the third driving member 18 drives the rotating disc 13 to rotate through the driving gear 19, the rotating disc 13 drives the four sliding rods 14 to slide in the four sliding grooves 15 through the four push grooves 16, the four sliding rods 14 drive the four push blocks 17 to move towards the liquid crystal wafer, the four push blocks 17 simultaneously abut against the circumferential side wall of the liquid crystal wafer and clamp the liquid crystal wafer, so that the placement position of the liquid crystal wafer can be calibrated. After the calibration is completed, the adsorption groove 8 adsorbs and fixes the liquid crystal wafer, the third driving member 18 reversely rotates, the push block 17 moves away from the liquid crystal wafer and resets, the lifting disc 12 and the rotating disc 13 are driven to move downwards through the lifting member 11, so that the push block 17 does not affect the rotation of the liquid crystal wafer on the turntable 7, and the stable completion of the edge searching operation is ensured.

[0054] The above is only an optional embodiment of the present disclosure and is not used to limit the present disclosure. The present disclosure can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An edge finding mechanism for a liquid crystal wafer inspection apparatus, characterized by: It includes base plate (1), support (2), detection unit (3), X-axis moving mechanism (4), Y-axis moving mechanism (5), drive component (6) and rotary table (7), the support (2) is fixedly arranged on the base plate (1), the detection unit (3) is fixedly arranged on the support (2), the X-axis moving mechanism (4) is arranged on the base plate (1), the Y-axis moving mechanism (5) is arranged on the moving end of X-axis moving mechanism (4), the drive component (6) is arranged on the moving end of Y-axis moving mechanism (5), the rotary table (7) is arranged on the drive end on the top of drive component (6), the X-axis moving mechanism (4) and Y-axis moving mechanism (5) are used to drive the rotary table (7) to move on the horizontal plane, a plurality of adsorption grooves (8) are formed in the rotary table (7), and the adsorption grooves (8) are used to adsorb and fix liquid crystal tablets.

2. An edge finding mechanism for a liquid crystal wafer inspection apparatus as claimed in claim 1, characterized in that: The X-axis moving mechanism (4) includes first driving part (41), first screw rod (42), first sliding block (43), first sliding seat (44), first moving seat (45) and first mounting base (46), the first mounting base (46) is fixedly arranged on the base plate (1), the first driving part (41) is fixedly arranged on the first mounting base (46), the first sliding seat (44) is arranged on the first mounting base (46), the first screw rod (42) is rotatably arranged on the first sliding seat (44), the first sliding block (43) is slidably arranged on the first sliding seat (44), the first screw rod (42) is screwed through the first sliding block (43), the first moving seat (45) is fixedly arranged on the first sliding block (43), the first moving seat (45) is connected with Y-axis moving mechanism (5), and the driving end of the first driving part (41) is in transmission connection with the first screw rod (42).

3. An edge finding mechanism for a liquid crystal wafer inspection apparatus as claimed in claim 2, wherein: The Y-axis moving mechanism (5) includes second driving part (51), second screw rod (52), second sliding block (53), second sliding seat (54), second moving seat (55) and second mounting base (56), the second sliding seat (54) is fixedly arranged on the first moving seat (45), the second mounting base (56) is fixedly arranged on the second sliding seat (54), the second driving part (51) is arranged on the second mounting base (56), the second screw rod (52) is rotatably arranged on the second sliding seat (54), the second sliding block (53) is slidably mounted on the second sliding seat (54), the second screw rod (52) is screwed through the second sliding block (53), the second driving part (51) is in transmission connection with the second screw rod (52), and the second moving seat (55) is arranged on the second sliding block (53).

4. An edge finding mechanism for a liquid crystal wafer inspection apparatus as claimed in claim 3, wherein: Two reinforcing plates (9) are arranged on the side wall of the second moving seat (55), and the two reinforcing plates (9) are symmetrically arranged on the opposite side walls of the second moving seat (55) along the horizontal direction.

5. An edge finding mechanism for a liquid crystal wafer inspection apparatus as claimed in claim 1, wherein: The bottom plate (1) is provided with a plurality of lifting pieces (11), the lifting ends of the plurality of lifting pieces (11) are fixedly provided with lifting discs (12), the lifting discs (12) are rotationally provided with rotating discs (13), four sliding grooves (15) are circumferentially and equidistantly formed on the lifting discs (12), a sliding rod (14) is slidingly arranged in each sliding groove (15) along the diameter direction of the lifting disc (12), the top end of each sliding rod (14) is fixedly provided with a push block (17), and the four push blocks (17) are located at the four sides of the liquid crystal wafer, respectively, four push grooves (16) are circumferentially and equidistantly formed on the rotating disc (13), the push grooves (16) are obliquely formed, the four sliding rods (14) are slidingly arranged in the four push grooves (16), respectively, and the four sliding rods (14) correspond to the four push grooves (16) in a one-to-one manner, a third driving piece (18) is arranged on the lifting disc (12), a driving gear (19) is arranged at the driving end of the third driving piece (18), and the driving gear (19) is in mesh with the outer side wall of the rotating disc (13).

6. An edge finding mechanism for a liquid crystal wafer inspection apparatus as claimed in claim 5, wherein: A limiting ring (20) is coaxially and fixedly arranged on the top wall of the lifting disc (12), and the outer side wall of the limiting ring (20) abuts against the inner side wall of the rotating disc (13).

7. An edge finding mechanism for a liquid crystal wafer inspection apparatus as claimed in claim 5, wherein: A guide block (21) is fixedly arranged on the side wall of the sliding rod (14), a guide groove (22) is formed in the lifting disc (12), the guide groove (22) and the sliding groove (15) are in communication with each other, and the guide block (21) is slidingly arranged in the guide groove (22) along the diameter direction of the lifting disc (12).

8. An edge finding mechanism for a liquid crystal wafer inspection apparatus as claimed in claim 5, wherein: The push block (17) is a flexible block.

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