CN114324404A

CN114324404A - AOI automatic optical detector relating to liquid crystal and microelectronic technology

Info

Publication number: CN114324404A
Application number: CN202111614774.XA
Authority: CN
Inventors: 李祥; 易中群
Original assignee: Shenzhen Ektion Technology Co ltd
Current assignee: Shenzhen Ektion Technology Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-12

Abstract

The invention belongs to the technical field of optical detectors, and discloses an AOI automatic optical detector relating to liquid crystal and microelectronic technologies. According to the invention, the top surface of the movable plate is provided with the third hole communicated with the side surface, the movable plate is controlled to rotate by the motor, the third hole on the movable plate is respectively communicated with the four groups of fixed tubes by controlling the movable plate to rotate by ninety degrees every time the motor controls the movable plate to rotate, the air pump is arranged on the top surface of the fixed seat and is communicated with the movable groove, air is supplied by the air pump to enter the first hole through the third hole and finally jack the loop bars upwards, the four groups of loop bars are jacked at intervals, the four-direction inclination of the PCB is realized, the detection of the side surface of a large-volume part on the existing PCB is facilitated, the detection integrity of the existing PCB is improved, and the detection effect is improved.

Description

AOI automatic optical detector relating to liquid crystal and microelectronic technology

Technical Field

The invention belongs to the technical field of optical detectors, and particularly relates to an AOI automatic optical detector relating to liquid crystal and microelectronic technologies.

Background

AOI (Automated Optical Inspection) is called automatic Optical Inspection in Chinese, and is a device for inspecting common defects encountered in welding production based on Optical principles. AOI is a new emerging testing technology, but the development is rapid, and AOI testing equipment is released by many manufacturers. During automatic detection, the machine automatically scans the PCB through the camera, acquires images, compares the tested welding spots with qualified parameters in the database, detects the defects on the PCB through image processing, displays/marks the defects through a display or an automatic mark for maintenance personnel to repair, and automatically detects various different mounting errors and welding defects on the PCB by using a high-speed high-precision vision processing technology. The PCB board can range from a fine pitch high density board to a low density large size board, and can provide an on-line inspection scheme to improve production efficiency, and soldering quality. By using AOI as a defect reduction tool, errors are located and eliminated early in the assembly process to achieve good process control. Early detection of defects will avoid sending a bad board to a subsequent assembly stage, AOI will reduce repair costs and will avoid scrapping an unrepairable circuit board.

Present AOI automatic optical detector that relates to liquid crystal and microelectronic technique, in the use, because the PCB board is placed and is examined behind the support plate, need reciprocating motion PCB board position, and through lateral shifting's camera, accomplish the positive comprehensive enlargies of PCB board and detect, nevertheless installation component has certain volume on the actual PCB board, shoot from directly over and examine time measuring, the condition on the part side that has certain volume can't effectively be shot, make the structure on the part side on the PCB board in the testing process normally can't in time detect, usually need manual slope and take extra equipment to observe the detection, this makes the actual detection effect of PCB board reduce, unable efficient carries out the complete detection of PCB board, the result of use is not good.

In addition, current AOI automatic optical inspection appearance that relates to liquid crystal and microelectronic technique, in the use, because the PCB board is placing on the support plate the back, usually only realize the reciprocal vertical movement of support plate through electronic slide rail mechanism, and the horizontal migration through the cooperation camera realizes the detection of everywhere on the PCB board is positive, however when dirty or the deformation appears in PCB board local position, only amplify the detection through the camera, can't effectively detect and clear away, usually need to improve PCB board actual height, accomplish the accurate inspection of local position, nevertheless because the support plate need remove, make to place to carry out high position control on the support plate difficultly, the special condition of actual PCB board is difficult to effectively realize detecting, the result of use is not good.

Disclosure of Invention

The invention aims to provide an AOI automatic optical detector relating to liquid crystal and microelectronic technologies, so as to solve the problems in the background technology.

In order to achieve the above purpose, the invention provides the following technical scheme: an AOI automatic optical detector relating to liquid crystal and microelectronic technology comprises a machine body, a mounting frame and a detection top seat, wherein an electric sliding mechanism is fixedly mounted on the inner surface of the mounting frame, a support plate is movably mounted on the inner side surface of the electric sliding mechanism, a fixed pipe is fixedly connected with the bottom surface of the support plate, a fixed seat is fixedly connected with the bottom surface of the fixed pipe, a first spring positioned in the fixed pipe is fixedly connected with the top surface of the fixed seat, a sleeve hole is formed in the top surface of the support plate, a sleeve rod is fixedly connected with the top surface of the first spring, the outer surface of the sleeve rod is movably sleeved with the sleeve hole, a first hole is formed in the top surface of the fixed seat, a movable groove is formed in the bottom surface of the fixed seat, a second hole is formed in the top surface of the fixed seat, a movable plate is movably sleeved with the inner surface of the movable groove, and a connecting mechanism is fixedly connected with the bottom surface of the movable plate, the bottom surface fixedly connected with motor cabinet of fixing base, the internal surface fixed mounting of motor cabinet has the motor, the output shaft and the coupling mechanism fixed connection of motor, No. three holes and No. four holes have been seted up respectively to the side and the top surface of fly leaf, the top surface fixed mounting of fixing base has the air pump, the fixed intercommunication in side of air pump has the intake pipe, the lower extreme and No. two fixed cup joints in hole of intake pipe, the middle section fixed mounting of intake pipe has a solenoid valve.

Preferably, the number of a hole and fixed pipe is four, the outer end in a hole is linked together with fixed pipe, realizes corresponding the promotion of fixed intraductal loop bar through the intercommunication in No. three holes and a hole, realizes the ascending slope of PCB board one side.

Preferably, the bottom surface fixedly connected with sealing ring of fixing base, the sealing ring cup joints in the outside of fly leaf, utilizes the sealed of sealing ring for when a hole and No. three holes do not communicate, when the air feed promoted the fly leaf downwards, No. three holes of keeping the fly leaf sealed all the time, guarantee that the air feed enters into fixed pipe through No. four holes.

Preferably, the third hole is communicated with the fourth hole, and the number of the third hole is one, so that air introduced into the air inlet pipe enters the third hole through the fourth hole after entering the movable groove and enters the first hole through the third hole.

Preferably, the top of the machine body is provided with an inner cavity, the motor and the motor base are located inside the inner cavity, and the length of the inner cavity is long enough to adapt to the movement of the motor in the inner cavity.

Preferably, coupling mechanism includes sleeve pipe, pivot, No. two springs, draw-in groove and cardboard, sleeve pipe fixed connection is in the bottom surface of fly leaf, the upper end and the fly leaf fixed connection of No. two springs just cup joint in sheathed tube inside, the lower extreme and the pivot fixed connection of No. two springs, the lower extreme of pivot and the output shaft fixed connection of motor make the fly leaf can move down through coupling mechanism, communicate when realizing four groups of a hole, utilize the elasticity of No. two springs to guarantee that the fly leaf can reset.

Preferably, the clamping groove is formed in the sleeve, the clamping plate is fixedly connected to the outer surface of the rotating shaft, the inner surface of the clamping groove is movably clamped with the clamping plate, the clamping groove and the clamping plate are movably clamped, the sleeve is made to rotate along with the rotating shaft, and accordingly rotation of the movable plate is achieved.

Preferably, the fixed surface of mounting bracket installs dust removal mechanism, dust removal mechanism includes the dust removal case, goes out tuber pipe, communicating pipe and No. two solenoid valves, go out the fixed intercommunication in side of tuber pipe and dust removal case, the upper end of communicating pipe and the fixed intercommunication in bottom surface of dust removal case, the right-hand member of communicating pipe and the fixed intercommunication of air pump, No. two solenoid valve fixed mounting utilize dust removal mechanism to accomplish the top surface dust clearance of PCB board on the middle section of communicating pipe, guarantee that the PCB board is clean, improve detection effect, realize the clearance of air that flows through the air pump air feed.

Preferably, the outer end slope of air-out pipe is downwards, dust removal mechanism is located electric sliding mechanism's top, through utilizing the air-out pipe of slope towards PCB board top, accomplishes high-efficient clearance.

Preferably, the top surfaces of the loop bars and the top surface of the carrier plate keep the same horizontal plane, the number of the loop bars is four, and the four loop bars are distributed in the carrier plate at equal intervals in an annular manner, so that the PCB is stably placed on the carrier plate in a static state, and the loop bars at different positions are lifted to enable the PCB to incline towards different directions, thereby completing the detection of local elements in different directions.

The invention has the following beneficial effects:

1. the invention fixedly connects fixed tubes on the bottom surface of a support plate, fixedly connects a fixed seat on the bottom surface of a sleeve, fixedly connects springs positioned in the fixed tubes on the top surface of the fixed seat, and defines a connecting loop bar at the upper end of a spring, so that the loop bar is sleeved in a loop hole formed on the top surface of the support plate, and forms a movable groove on the bottom surface of the fixed seat, so that a movable plate is movably sleeved in the movable groove, forms a first hole communicated with four groups of fixed tubes in the fixed seat, forms a third hole communicated with the side surface on the top surface of the movable plate, controls the movable plate to rotate by a motor, realizes that the third hole on the movable plate is respectively communicated with the four groups of fixed tubes by controlling the movable plate to rotate by ninety degrees every time by the motor, and installs an air pump on the top surface of the fixed seat, so that the air pump is communicated with the movable groove, and causes the air to enter the first hole through the third hole and finally jack up the loop bar by the air pump, through four group's loop bars interval jack-ups, realize the slope of four directions of PCB board, the convenience is to the detection of bulky part side on the present PCB board, improves the detection integrality of present PCB board, improves detection effect.

2. The invention fixedly connects the sleeve on the bottom surface of the movable plate, fixedly connects the second spring in the sleeve on the bottom surface of the movable plate, fixedly connects the second spring with the rotating shaft, fixedly connects the clamping plate on the side surface of the rotating shaft, enables the inner surface of the sleeve to be provided with the clamping groove, enables the inner surface of the clamping groove to be movably clamped with the clamping plate, and controls the motor to drive the movable plate to rotate by integral multiples of non-ninety degrees, so that the third hole is not communicated with any group of the first holes, at the moment, the air pump is started, air is supplied to the movable groove through the air pump, the movable plate is pushed downwards by the introduced air, the four groups of the first holes are simultaneously opened along with the downward movement of the movable plate, and then the four groups of the first holes simultaneously enter the air with the same amount, so that the four groups of loop bars are simultaneously lifted, and further the existing PCB on the support plate is lifted upwards, when the local observation of the existing PCB is unclear, the detection can be more carefully carried out through the lifting of the existing PCB, the detection of the existing PCB under various conditions is greatly improved, the detection effect is enlarged, and the using effect is good.

3. According to the invention, the dust removal box is fixedly installed on the inner surface of the installation frame, the air outlet pipes are fixedly sleeved on the side surfaces of the dust removal box, the lower ends of a plurality of groups of air outlet pipes are kept inclined downwards, so that air blown out from the air outlet pipes can be aligned to the existing PCB on the support plate, the bottom surface of the dust removal box is fixedly communicated with the communication pipe, the other end of the communication pipe is communicated with the air pump, the first electromagnetic valve and the second electromagnetic valve are respectively installed on the air inlet pipe and the communication pipe, after the existing PCB is placed in the air pump, the air pump is started, the second electromagnetic valve is simultaneously opened, the first electromagnetic valve is closed, air supplied by the air pump is led to the inside of the dust removal box, and then the air outlet pipes are used for blowing the wind to the existing PCB on the support plate, so that the front wind power dust removal of the PCB is realized, the top surface of the existing PCB is ensured to be clean, the detection effect of the existing PCB is reduced due to dirty surface, and the high-efficiency detection quality is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional schematic view of the mount of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

FIG. 4 is an enlarged view of the structure at B in FIG. 2;

FIG. 5 is an exploded view of the present invention between the anchor block and the mounting tube;

FIG. 6 is an exploded view of the movable plate and the fixed plate of the present invention;

FIG. 7 is a top view of the mounting base of the present invention;

FIG. 8 is an exploded view of the movable plate and the connecting mechanism of the present invention;

FIG. 9 is a schematic view of the dust removing mechanism of the present invention.

In the figure: 1. a body; 2. a mounting frame; 3. detecting the top seat; 4. an electric sliding mechanism; 5. a carrier plate; 6. trepanning; 7. a fixed tube; 8. a fixed seat; 9. a first spring; 10. a loop bar; 11. a first hole; 12. a movable groove; 13. a second hole; 14. a movable plate; 15. a third hole; 16. a fourth hole; 17. a connecting mechanism; 171. a sleeve; 172. a rotating shaft; 173. a second spring; 174. a card slot; 175. clamping a plate; 18. a motor base; 19. a motor; 20. an air pump; 21. an air inlet pipe; 22. a first electromagnetic valve; 23. a seal ring; 24. a dust removal mechanism; 241. a dust removal box; 242. an air outlet pipe; 243. a communicating pipe; 244. a second electromagnetic valve; 25. an inner cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 9, in the embodiment of the present invention, an AOI automatic optical inspection apparatus relating to liquid crystal and microelectronic technologies includes a machine body 1, a mounting frame 2 and an inspection top base 3, an electric sliding mechanism 4 is fixedly mounted on an inner surface of the mounting frame 2, the electric sliding mechanism 4 is an existing mechanism for driving a carrier plate 5 to move, a carrier plate 5 is movably mounted on an inner side surface of the electric sliding mechanism 4, the carrier plate 5 is used for placing a PCB, a fixing tube 7 is fixedly connected to a bottom surface of the carrier plate 5, a fixing base 8 is fixedly connected to a bottom surface of the fixing tube 7, a first spring 9 located inside the fixing tube 7 is fixedly connected to a top surface of the fixing base 8, a loop bar 10 is reset by elasticity of the first spring 9 when gas supply is stopped, a loop hole 6 is formed on the top surface of the carrier plate 5, a loop bar 10 is fixedly connected to a top surface of the first spring 9, an outer surface of the loop bar 10 is movably sleeved with the loop hole 6, the inclination of the PCB at different angles is realized by independently lifting four groups of loop bars 10, the detection effect is improved, the top surface of the fixed seat 8 is provided with a first hole 11, the bottom surface of the fixed seat 8 is provided with a movable groove 12, the top surface of the fixed seat 8 is provided with a second hole 13, the inner surface of the movable groove 12 is movably sleeved with a movable plate 14, the bottom surface of the movable plate 14 is fixedly connected with a connecting mechanism 17, the bottom surface of the fixed seat 8 is fixedly connected with a motor seat 18, the inner surface of the motor seat 18 is fixedly provided with a motor 19, the output shaft of the motor 19 is fixedly connected with the connecting mechanism 17, the rotation of the movable plate 14 is realized through the motor 19, the side surface and the top surface of the movable plate 14 are respectively provided with a third hole 15 and a fourth hole 16, the top surface of the fixed seat 8 is fixedly provided with an air pump 20, the air pump 20 is used for providing driving force, the side surface of the air pump 20 is fixedly communicated with an air inlet pipe 21, and the lower end of the air pump 21 is fixedly sleeved with the second hole 13, a first electromagnetic valve 22 is fixedly installed at the middle section of the air inlet pipe 21.

Wherein, the quantity of a hole 11 and fixed pipe 7 is four, and the outer end and the fixed pipe 7 of a hole 11 are linked together, realize corresponding the promotion of loop bar 10 in the fixed pipe 7 through the intercommunication of No. three holes 15 and a hole 11, realize the ascending slope of PCB board one side.

Wherein, the bottom surface fixedly connected with sealing ring 23 of fixing base 8, sealing ring 23 cup joints in the outside of fly leaf 14, utilizes the sealed of sealing ring 23 for when No. one hole 11 and No. three hole 15 do not communicate, when the air feed pushed fly leaf 14 downwards, No. three hole 15 of fly leaf 14 keeps sealed all the time, guarantees that the air feed enters into fixed pipe 7 through four No. one holes 11.

The third hole 15 is communicated with the fourth hole 16, the number of the third holes 15 is one, and the third holes 15 are communicated with the fourth holes 16 through the third holes 15, so that air introduced into the air inlet pipe 21 enters the third holes 15 through the fourth holes 16 after entering the movable groove 12 and enters the first holes 11 through the third holes 15.

Wherein, the top of organism 1 has seted up inner chamber 25, and motor 19 and motor cabinet 18 are located the inside of inner chamber 25, and the length of inner chamber 25 is enough long, adapts to the removal of motor 19 in inner chamber 25.

Wherein, coupling mechanism 17 includes sleeve pipe 171, pivot 172, No. two springs 173, draw-in groove 174 and cardboard 175, sleeve pipe 171 fixed connection is in the bottom surface of fly leaf 14, the upper end and the fly leaf 14 fixed connection of No. two springs 173 and cup joint in the inside of sleeve pipe 171, the lower extreme and the pivot 172 fixed connection of No. two springs 173, the lower extreme of pivot 172 and the output shaft fixed connection of motor 19, make fly leaf 14 can the downstream through coupling mechanism 17, communicate when realizing four groups of No. one hole 11, utilize the elasticity of No. two springs 173 to guarantee that fly leaf 14 can reset.

Wherein, the draw-in groove 174 is opened in the inside of sleeve 171, on the surface of cardboard 175 fixedly connected with pivot 172, the internal surface of draw-in groove 174 and cardboard 175 activity joint utilize draw-in groove 174 and cardboard 175 activity joint for sleeve 171 is rotatory along with pivot 172, and then realizes the rotation of fly leaf 14.

Wherein, the fixed surface of mounting bracket 2 installs dust removal mechanism 24, dust removal mechanism 24 includes dust removal case 241, go out tuber pipe 242, communicating pipe 243 and No. two solenoid valves 244, the fixed intercommunication in side of going out tuber pipe 242 and dust removal case 241, the upper end of communicating pipe 243 and the fixed intercommunication in bottom surface of dust removal case 241, the right-hand member and the fixed intercommunication of air pump 20 of communicating pipe 243, No. two solenoid valves 244 fixed mounting is on the middle section of communicating pipe 243, utilize dust removal mechanism 24 to accomplish the top surface dust clearance of PCB board, guarantee that the PCB board is clean, improve detection effect, realize the clearance of air that flows through the air pump 20 air feed.

Wherein, the outer end slope of play tuber pipe 242 is downward, and dust removal mechanism 24 is located the top of electric sliding mechanism 4, through utilizing the play tuber pipe 242 of slope towards the PCB board top, accomplishes high-efficient clearance.

The top surfaces of the loop bars 10 and the top surface of the carrier plate 5 are kept at the same horizontal plane, the number of the loop bars 10 is four, the four loop bars 10 are distributed in the carrier plate 5 at equal intervals in an annular manner, so that the PCB is stably placed on the carrier plate 5 in a static state, and the loop bars 10 at different positions are lifted to enable the PCB to incline towards different directions, so that the detection of local elements in different directions is completed.

The working principle and the using process are as follows: placing the PCB on the carrier 5, starting the air pump 20, opening the first electromagnetic valve 22, opening the second electromagnetic valve 244 to supply air to the communicating pipe 243 by the air pump 20, feeding the air into the dust removing box 241, spraying the air to the PCB on the carrier 5 through the inclined air outlet pipe 242, blowing off dust on the top surface of the PCB, closing the second electromagnetic valve 244 and the air pump 20, starting the electric sliding mechanism 4, enabling the carrier 5 to drive the PCB to vertically move for detection operation, when local detection needs to be carried out on the side surface of the top part of the PCB, starting the motor 19 to drive the rotating shaft 172 to rotate, enabling the third hole 15 on the side surface of the movable plate 14 to be communicated with the first hole 11 inside the fixed seat 8, starting the air pump 20, keeping the second electromagnetic valve 244 closed, opening the first electromagnetic valve 22, enabling the air pump 20 to supply air to the movable groove 12 through the air inlet pipe 21, and enabling the air to enter the third hole 15 through the fourth hole 16 on the top surface of the movable plate 14, the air enters the fixed tube 7 through the third hole 15 and the first hole 11, so that the entering air pushes one loop bar 10 to ascend, one side of the PCB is further ascended and inclined, and the local side detection is completed; when the local part of the PCB needs to be adjusted and detected again in a close range, the control motor 19 drives the rotating shaft 172 to rotate, the third hole 15 on the side surface of the movable plate 14 is not communicated with any first hole 11, the air pump 20 is started, the first electromagnetic valve 22 is opened, the air pushes the movable plate 14 to move downwards, the four groups of first holes 11 are opened simultaneously, the pumped air enters the fixed pipe 7 through the four groups of first holes 11, the four groups of loop bars 10 move upwards simultaneously, and therefore the PCB ascends.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a AOI automatic optical inspection appearance that relates to liquid crystal and microelectronic technique, includes organism (1), mounting bracket (2) and detects footstock (3), its characterized in that: the inner surface of the mounting frame (2) is fixedly provided with an electric sliding mechanism (4), the inner side surface of the electric sliding mechanism (4) is movably provided with a support plate (5), the bottom surface of the support plate (5) is fixedly connected with a fixed pipe (7), the bottom surface of the fixed pipe (7) is fixedly connected with a fixed seat (8), the top surface of the fixed seat (8) is fixedly connected with a spring (9) positioned in the fixed pipe (7), the top surface of the support plate (5) is provided with a loop hole (6), the top surface of the spring (9) is fixedly connected with a loop rod (10), the outer surface of the loop rod (10) is movably sleeved with a loop hole (16), the top surface of the fixed seat (8) is provided with a hole (11), the bottom surface of the fixed seat (8) is provided with a movable groove (12), the top surface of the fixed seat (8) is provided with a hole (13), the internal surface activity of activity groove (12) has cup jointed fly leaf (14), the bottom surface fixedly connected with coupling mechanism (17) of fly leaf (14), the bottom surface fixedly connected with motor cabinet (18) of fixing base (8), the internal surface fixed mounting of motor cabinet (18) has motor (19), the output shaft and coupling mechanism (17) fixed connection of motor (19), No. three holes (15) and No. four holes (16) have been seted up respectively to the side and the top surface of fly leaf (14), the top surface fixed mounting of fixing base (8) has air pump (20), the fixed intercommunication in side of air pump (20) has intake pipe (21), the lower extreme and No. two holes (13) fixed cup joint of intake pipe (21), the middle section fixed mounting of intake pipe (21) has solenoid valve (22) No. one.

2. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 1, wherein: the number of the first holes (11) and the number of the fixed pipes (7) are four, and the outer ends of the first holes (11) are communicated with the fixed pipes (7).

3. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 1, wherein: the bottom surface of the fixed seat (8) is fixedly connected with a sealing ring (23), and the sealing ring (23) is sleeved on the outer side of the movable plate (14).

4. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 1, wherein: the third hole (15) is communicated with the fourth hole (16), and the number of the third hole (15) is one.

5. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 1, wherein: an inner cavity (25) is formed in the top of the machine body (1), and the motor (19) and the motor base (18) are located inside the inner cavity (25).

6. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 1, wherein: coupling mechanism (17) include sleeve pipe (171), pivot (172), No. two spring (173), draw-in groove (174) and cardboard (175), sleeve pipe (171) fixed connection is in the bottom surface of fly leaf (14), the upper end and fly leaf (14) fixed connection and the cup joint in the inside of sleeve pipe (171) of No. two spring (173), the lower extreme and pivot (172) fixed connection of No. two spring (173), the lower extreme of pivot (172) and the output shaft fixed connection of motor (19).

7. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 6, wherein: the clamping groove (174) is formed in the sleeve (171), the clamping plate (175) is fixedly connected to the outer surface of the rotating shaft (172), and the inner surface of the clamping groove (174) is movably clamped with the clamping plate (175).

8. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 1, wherein: the utility model discloses a dust removal mechanism, including dust removal case (241), air-out pipe (242), communicating pipe (243) and No. two solenoid valve (244), the internal surface fixed mounting of mounting bracket (2) has dust removal mechanism (24), dust removal mechanism (24) are including dust removal case (241), air-out pipe (242), communicating pipe (243) and No. two solenoid valve (244), the fixed intercommunication in side of air-out pipe (242) and dust removal case (241), the upper end of communicating pipe (243) and the fixed intercommunication in bottom surface of dust removal case (241), the right-hand member and the fixed intercommunication of air pump (20) of communicating pipe (243), solenoid valve (244) fixed mounting is on the middle section of communicating pipe (243).

9. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies of claim 8, wherein: the outer end of the air outlet pipe (242) is inclined downwards, and the dust removal mechanism (24) is positioned above the electric sliding mechanism (4).

10. The AOI automatic optical detector relating to liquid crystal and microelectronic technologies according to claim 1, wherein: the top surface of the loop bar (10) and the top surface of the carrier plate (5) keep the same horizontal plane, the number of the loop bar (10) is four, and the four loop bar (10) are annularly distributed in the carrier plate (5) at equal intervals.