CN107064770B

CN107064770B - Full-automatic flexible circuit board testing machine

Info

Publication number: CN107064770B
Application number: CN201611087606.9A
Authority: CN
Inventors: 林咏华
Original assignee: Shenzhen Kaima Times Technology Co ltd
Current assignee: Shenzhen Kaima Times Technology Co ltd
Priority date: 2016-12-01
Filing date: 2016-12-01
Publication date: 2023-11-10
Anticipated expiration: 2036-12-01
Also published as: CN107064770A; CN117420416A; CN117326281A

Abstract

The invention provides a full-automatic flexible circuit board testing machine which comprises a feeding mechanism with a feeding placing table, a conveying mechanism, a CCD alignment mechanism, a testing mechanism and a discharging mechanism with a discharging placing table, wherein the conveying mechanism comprises a moving platform, a clamp for clamping a flexible circuit board is arranged on the moving platform and comprises an air cylinder, a push block, a movable clamping plate, a fixed clamping plate and a clamping head, and the rear end of the push block is connected with a piston rod of the air cylinder; the movable clamping plate is arranged at the front end of the pushing block and comprises a movable clamping plate body, side parts extending from two sides of the movable clamping plate body towards the pushing block and a hollowed-out part surrounded by the movable clamping plate body and the side parts, and the front end of the pushing block extends into the hollowed-out part; the fixed clamping plate is arranged below the movable clamping plate; the clamping head comprises an upper clamping head and a lower clamping head which is arranged opposite to the upper clamping head. The invention improves the transmission efficiency and the test stability by arranging the mobile platform.

Description

Full-automatic flexible circuit board testing machine

Technical Field

The invention relates to the field of circuit board circuit detection, in particular to a full-automatic flexible circuit board testing machine.

Background

With the rapid development of electronic technology, electronic products gradually develop towards the directions of ultra-small, ultra-thin, bendable, foldable, multifunctional and good in safety, so that the corresponding circuit boards are required to have high density, good flexibility and good safety.

Because of the production process of a flexible circuit board factory, the produced flexible circuit board always has a series of problems such as poor soldering, short circuit, impedance difference caused by insufficient thickness of copper foil and the like, the efficiency of testing the flexible circuit board by the two-wire testing machine in the current market is too low, the efficiency of the flexible circuit board in the conveying process is low and unstable, and the conditions of stretching, overtightening or loosening of the flexible circuit board and loose clamping of the flexible circuit board are easy to occur.

Therefore, it is necessary to provide a fully automatic flexible circuit board tester to solve the problems of the prior art.

Disclosure of Invention

The embodiment of the invention provides a full-automatic flexible circuit board tester with high transmission efficiency, high flexible circuit board placement stability and high test precision.

The embodiment of the invention provides a full-automatic flexible circuit board testing machine which comprises a feeding mechanism with a feeding placing table, a conveying mechanism, a CCD alignment mechanism, a testing mechanism and a discharging mechanism with a discharging placing table;

The conveying mechanism comprises:

the clamping plate tray is used for placing the flexible circuit board transferred from the feeding mechanism and is arranged between the feeding placing table and the discharging placing table in a lifting manner;

the movable platform is used for fixedly clamping the flexible circuit board on the clamping plate tray and transmitting the flexible circuit board to the CCD alignment mechanism and the testing mechanism for corresponding alignment and testing;

the movable platform comprises first Y-direction guide rails arranged on two sides of the movable platform, two first X-direction guide rails which are slidably arranged on the first Y-direction guide rails, locking parts for locking the first X-direction guide rails on the first Y-direction guide rails, and four clamps which are arranged on the first X-direction guide rails; one clip is fixedly connected with the first X-ray guide rail through a fixing part, and the other three clips are in sliding connection with the first X-ray guide rail through a driving part;

wherein, the clip includes:

the air cylinder is provided with a plurality of air cylinders,

the fixed clamping plate comprises a front part arranged at the front end of the fixed clamping plate, a middle part arranged at the middle end of the fixed clamping plate and a rear part arranged at the rear end of the fixed clamping plate and used for fixedly placing the air cylinder;

The movable clamping plate is arranged above the front part of the fixed clamping plate and is in clamping or loosening fit with the front part of the fixed clamping plate, and the movable clamping plate comprises a movable clamping plate body and side parts extending from two sides of the movable clamping plate body towards the direction of the pushing block;

the pushing block is arranged between the movable clamping plate and the air cylinder, is driven by the air cylinder and is used for driving the movable clamping plate to be in clamping or loosening fit with the fixed clamping plate;

the clamping head comprises an upper clamping head and a lower clamping head, the upper clamping head is arranged at the bottom end of the movable clamping plate body, the lower clamping head is arranged at the top end of the front part of the fixed clamping plate, the upper clamping head and the lower clamping head are matched with each other, and clamping surfaces of the upper clamping head and the lower clamping head for directly clamping the flexible circuit board are in a saw-tooth shape;

the clamp further comprises two first connecting rods and two second connecting rods, wherein the upper parts of the two first connecting rods are connected to the rear ends of the two side parts of the push block and the movable clamping plate through first rotating shafts, the lower parts of the two first connecting rods are connected to the front ends of the middle parts of the fixed clamping plates through second rotating shafts, the upper parts of the two second connecting rods are connected to the middle ends of the two side parts of the movable clamping plate through third rotating shafts, and the lower parts of the two second connecting rods are connected to the front and rear ends of the fixed clamping plates through fourth rotating shafts; the heights of the first connecting rod and the second connecting rod are equal;

The movable clamping plate further comprises a hollowed-out part surrounded by the movable clamping plate body and the two side parts, the push block comprises a push block body connected to the air cylinder and a protruding part protruding out of the push block body, the protruding part stretches into the hollowed-out part and is connected with the two side parts of the movable clamping plate and the first connecting rods through the first rotating shaft, and the two first connecting rods are arranged on the two sides of the protruding part and are arranged in the hollowed-out part;

the two side surfaces of the upper part of the first connecting rod are respectively attached to the protruding part and the inner wall of the side part of the movable clamping plate, and the side surface of the upper part of the second connecting rod is attached to the outer wall of the side part of the movable clamping plate.

In the invention, two sides of the middle part of the fixed clamping plate are provided with stepped baffles towards the vertical direction, and a limiting space for accommodating and guiding the pushing block to horizontally transfer is formed between the two baffles;

the pushing block body is arranged in the limiting space, and two side faces of the pushing block body are attached to the side faces of the baffle plate.

In the invention, a positioning groove for installing the air cylinder is arranged at the rear part of the fixed clamping plate, and a supporting bar with a right triangle cross section is arranged above the rear end of the positioning groove;

The vertical surface of the supporting bar is flush with the rear end surface of the positioning groove, and the rear end surface of the air cylinder abuts against the vertical surface of the supporting bar.

In the invention, the first X-direction guide rail is also provided with a slide block assembly, and the slide block assembly comprises a first Y-direction slide block sliding on the first Y-direction guide rail and a slide block fixing block which is fixedly connected with the two ends of the first X-direction guide rail and is used for fixing the inverted L-shaped first Y-direction slide block; the locking component comprises a locking knob with a star-shaped structure, a connecting screw rod arranged at the bottom of the locking knob and a top block arranged at the bottom of the connecting screw rod;

the locking knob is arranged on the upper surface of the transverse part of the sliding block fixing block, the connecting screw rod penetrates through the transverse part of the sliding block fixing block and is in threaded connection with the transverse part of the sliding block fixing block, and the top block is arranged right above the first Y-direction guide rail and is used for propping against the first Y-direction guide rail.

In the invention, the feeding mechanism comprises a feeding placing table and a feeding mechanical arm, wherein the feeding placing table comprises:

the limiting component is used for adjusting the flexible circuit board placed on the placement platform to be centered on the placement platform and is arranged on the second Y-direction sliding block and the second X-direction sliding block, and the limiting component penetrates through and protrudes out of the placement platform;

The placing platform is arranged above the feeding mechanism and is provided with an opening for the limiting part to move;

the fixed platform is arranged below the placing platform and is fixedly connected with the placing platform through a fixed column;

the two second Y-direction sliding blocks are slidably arranged on a second Y-direction guide rail positioned in the middle of the longitudinal direction of the fixed platform and used for driving the limiting component to slide along the second Y-direction guide rail;

the two second X-direction sliding blocks are slidably arranged on a second X-direction guide rail positioned in the middle of the transverse direction of the fixed platform and used for driving the limiting component to slide along the second X-direction guide rail;

the Y-direction motor is connected to the two second Y-direction sliding blocks through a Y-direction screw rod for driving the second Y-direction sliding blocks to slide, and the Y-direction motor is arranged at the edge of the fixed platform and positioned in the extending direction of the second Y-direction guide rail;

the X-direction motor is connected to the two second X-direction sliding blocks through an X-direction screw rod for driving the second X-direction sliding blocks to slide, and is arranged at the edge of the fixed platform and positioned in the extending direction of the second X-direction guide rail;

wherein, the spacing part is the baffle, the opening is "cross" font and arranges.

In the invention, the CCD alignment mechanism comprises two groups of CCD alignment units which are used for photographing each test MARK point on the flexible circuit board and are oppositely arranged up and down, and the CCD alignment units comprise: the device comprises a CCD camera, an object image telecentric lens connected with the CCD camera, a lens fixing component for fixing the object image telecentric lens, and a right-angle prism which is arranged in the lens fixing component and can deflect incident light by 90 degrees;

wherein, CCD camera, object image telecentric lens and lens fixed part coaxial line just take the level to place.

In the present invention, the lens fixing part includes;

the fixing part is used for fixedly connecting the object image telecentric lens;

the accommodating part is arranged on one side of the fixing part and comprises an accommodating cavity which is arranged in the accommodating part and is used for accommodating the right-angle prism and an opening which is arranged at the top of the accommodating cavity and is communicated with the accommodating cavity;

a connecting part extending from one end of the fixing part and fixedly connected to the accommodating part;

the observation part is used for observing the fixing condition of the object image telecentric lens and is surrounded by the fixing part, the connecting part and the accommodating part;

the light source receiving part is used for receiving external light rays, is arranged at the opening and protrudes out of the accommodating part;

The object telecentric lens passes through the fixing part and the observing part and stretches into the accommodating cavity of the accommodating part.

In the invention, the test mechanism comprises two test units which are arranged oppositely up and down, and the test units comprise:

the fixed platform is provided with a third X-direction guide rail and a first sliding platform driving component for driving the first sliding platform to move on the third X-direction guide rail;

the first sliding platform is arranged on the third X-direction guide rail and is in sliding connection with the third X-direction guide rail through a first sliding block, and comprises a third Y-direction guide rail fixedly arranged on one surface opposite to the fixed platform;

the second sliding platform is arranged on the third Y-direction guide rail and is in sliding connection with the third Y-direction guide rail through a second sliding block;

the Y-direction fine adjustment subunit is used for carrying out corresponding fine adjustment on the test fixture according to the Y-direction deviation calculated by the CCD alignment mechanism and is arranged on one surface of the second sliding platform, which is opposite to the third Y-direction guide rail;

the corner fine tuning subunit is used for carrying out corresponding fine tuning on the test jig according to the corner deviation calculated by the CCD alignment mechanism and is fixedly arranged on one side of the jig fixing plate;

The test unit further comprises a lifting subunit for driving the test jig to move up and down, and the lifting subunit penetrates through the fixed platform, the first sliding platform and the second sliding platform and is connected to the fixture fixed plate.

In the present invention, the lifting subunit includes:

the lifting motor is used for driving the test jig to move up and down;

the motor bracket comprises an upper fixing plate arranged at the top of the motor bracket, a lower fixing plate arranged below the upper fixing plate and a stabilizing column fixedly connected with the upper fixing plate and the lower fixing plate, and the lifting motor is fixed on the upper fixing plate;

the base is arranged below the motor bracket and comprises a stepped accommodating space which is arranged in the base and penetrates through the base;

the stabilizing plate is arranged between the lower fixing plate and the base, and a space is reserved between the stabilizing plate and the lower fixing plate;

the test machine head connecting block is arranged below the base, and the longitudinal section of the test machine head connecting block is in an inverted convex shape;

the ball screw is used for driving the first spline shaft to move up and down, is connected to the lifting motor, penetrates through the stabilizing plate and stretches into the accommodating space;

The first spline shaft is used for driving the test machine head connecting block to move up and down, is arranged between the stabilizing plate and the test machine head connecting block and is fixed on the outer peripheral side of the stabilizing plate, and penetrates through the base to be connected with the test machine head connecting block;

the second spline shaft is fixed between the lower fixing plate and the base, and penetrates through the stabilizing plate to be fixedly connected with the base;

the first spline housing is sleeved on the first spline shaft and is respectively fixed at the top of the base and the top of the test machine head connecting block;

the second spline housing is sleeved on the second spline shaft and is fixed at the top of the stabilizing plate;

the first spline shaft and the second spline shaft are respectively arranged in the circumferential direction of two different circles taking the ball screw as a central shaft, and the first spline shaft and the second spline shaft are alternately arranged.

Compared with the prior art, the full-automatic flexible circuit board testing machine improves the conveying efficiency of the flexible circuit board through the arrangement of the mobile platform; through the setting of clip, improved the stability of flexible circuit board when placing, solved the conveying inefficiency of flexible circuit board of prior art and the poor technical problem of stability when placing.

Drawings

FIG. 1 is a schematic diagram of a front view of a preferred embodiment of a fully automatic flexible circuit board tester according to the present invention;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 along section line BB;

FIG. 3 is a schematic top view of a fully automated flexible circuit board tester according to a preferred embodiment of the present invention;

FIG. 4 is a schematic top view of a mobile platform of the fully automatic flexible circuit board tester according to the present invention;

FIG. 5 is a schematic diagram of the front view of the mobile platform of the fully automatic flexible circuit board tester according to the present invention;

FIG. 6 is a schematic view of the clip of FIG. 4 in an original state;

FIG. 7 is a schematic view of the clip of FIG. 4 in a snap-fit configuration;

fig. 8 is an enlarged view of a in fig. 5;

FIG. 9 is a schematic view of the feed placement table of the fully automatic flexible circuit board tester of the present invention;

FIG. 10 is a schematic diagram of an exploded structure of a CCD alignment unit of the full-automatic flexible circuit board tester of the present invention;

FIG. 11 is a schematic elevational view of the structure of FIG. 10;

FIG. 12 is a schematic diagram of an upper test unit of the full-automatic flexible circuit board tester

FIG. 13 is a schematic perspective view of the lifting sub-unit of FIG. 12;

fig. 14 is a schematic view of the front view structure of fig. 13

FIG. 15 is a schematic cross-sectional view of FIG. 14 along section line CC;

FIG. 16 is a schematic cross-sectional view taken along section line DD of FIG. 14;

FIG. 17 is a schematic view of the corner trim subunit, clamp mounting plate and test head connection block of FIG. 12;

FIG. 18 is a side elevational structural view of FIG. 17;

fig. 19 is a four-wire test circuit diagram of a fully automatic flexible circuit board tester according to the present invention.

Detailed Description

Referring to the drawings, wherein like reference numbers refer to like elements throughout, the principles of the present invention are illustrated in an appropriate computing environment. The following description is based on illustrative embodiments of the invention and should not be taken as limiting other embodiments of the invention not described in detail herein.

Referring to fig. 1 to 3, fig. 1 is a schematic front view of a fully automatic flexible circuit board tester according to the present invention; FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 along section line BB; fig. 3 is a schematic top view of the fully automatic flexible circuit board tester according to the present invention. The fully automatic flexible circuit board testing machine 100 of the present invention includes a feeding mechanism having a feeding placement stage 11, a conveying mechanism, a CCD alignment mechanism, a testing mechanism, and a discharging mechanism having a discharging placement stage 51. The transfer mechanism includes a pallet tray 21 and a moving platform 22.

Wherein the clamping plate tray 21 is used for placing the flexible circuit board 60 transferred from the feeding mechanism, and the clamping plate tray 21 is arranged between the feeding placing table 11 and the discharging placing table 51; the moving platform 22 is used for fixing and clamping the flexible circuit board 60 on the clamping plate tray 21 and conveying the flexible circuit board 60 to the CCD alignment mechanism and the testing mechanism for corresponding alignment and testing. A main Y-direction guide rail and a main motor for driving the movable platform 22 to slide on the main Y-direction guide rail are arranged below a fixed bracket of the full-automatic flexible circuit board testing machine 100, a first main X-direction guide rail and a second main X-direction guide rail which is parallel to the first main X-direction guide rail and is arranged behind the first main X-direction guide rail are arranged above the fixed bracket, a CCD alignment unit 30 is slidably arranged on the first main X-direction guide rail, and a testing unit 40 is slidably arranged on the second main X-direction guide rail; the infeed station 11, the clamping plate tray 21 and the outfeed station 51 are arranged horizontally side by side.

In addition, the area of the clamping plate tray 21 is smaller than that of the flexible circuit board 60, and when the flexible circuit board 60 is placed, the periphery of the flexible circuit board 60 exceeds the periphery edge of the tray, so that the clamp 224 in the movable platform 22 can clamp the flexible circuit board 60 conveniently. The "clip 224" is described later.

Fig. 4 and 5 are schematic top view structures of a moving platform of the fully automatic flexible circuit board tester according to the present invention; fig. 5 is a schematic diagram of a front view of a moving platform of the fully automatic flexible circuit board tester according to the present invention.

The moving platform 22 comprises a first Y-direction guide rail 221 arranged on two sides of the moving platform 22, two first X-direction guide rails 222 which are slidably arranged on the first Y-direction guide rail 221, a locking part 223 which locks the first X-direction guide rail 222 on the first Y-direction guide rail 221, and four clamps 224 which are arranged on the first X-direction guide rail 222; one clip 224 is fixedly coupled to the first X-ray guide 222 by a fixing member 226, and the other three clips 224 are slidably coupled to the first X-ray guide 222 by a driving member 225; one of the fixedly mounted clips 224 and one of the slidably mounted clips 224 are disposed on one of the first X-rails 222 and the other two slidably mounted clips are disposed on the other of the first X-rails 222.

Wherein, optionally, the fixing member 226 is a screw, and the clip 224 is fixed on the first X-guide rail 222 through the screw. Of course, in the preferred embodiment, the fixing member 226 is not only disposed on one clip 224, but also disposed on the other three slidably connected clips 224, so that the user can flexibly select any clip 224 as the clip 224 fixedly disposed on the first X-direction guide 222.

It is apparent that the fixed clips 224 in the moving platform 22 clip one corner of the flexible circuit board 60 to be fixed, and the three slidably mounted clips 224 clip three other corners of the flexible circuit board 60 respectively, and then the clips 224 start to stretch and adjust towards opposite directions of the fixed corners respectively, so that the flexible circuit board 60 is more flat and has stable and balanced overall tension, and the situation of over-tightening or over-loosening does not occur, which affects the subsequent alignment and detection procedures.

It should be appreciated that the position of the clip 224 of the mobile platform 22, which is fixedly mounted, needs to be preset according to the size of the flexible circuit board 60 before the mobile platform 22 clamps the flexible circuit board 60.

In the preferred embodiment, as shown in fig. 6 and 7, the clamp 224 includes an air cylinder 2241, a push block 2242, a movable clamp plate 2243, a stationary clamp plate 2244, and a collet 2245.

The fixing splint 2244 includes a front portion provided at a front end of the fixing splint 2244, a middle portion provided at a middle end of the fixing splint 2244, and a rear portion provided at a rear end of the fixing splint 2244 for fixedly accommodating the cylinder 2241;

the movable clamping plate 2243 is disposed above the front portion of the fixed clamping plate 2244 and is in clamping or loosening fit with the front portion of the fixed clamping plate 2244, and the movable clamping plate 2243 includes a movable clamping plate body 2243a, and side portions 2243b extending from both sides of the movable clamping plate body 2243a toward the pushing block 2242;

The pushing block 2242 is arranged between the movable clamping plate 2243 and the air cylinder 2241, and the pushing block 2242 is driven by the air cylinder 2241 and is used for driving the movable clamping plate 2243 to be in clamping or loosening fit with the fixed clamping plate 2244;

the clamping head 2245 includes an upper clamping head 2245a and a lower clamping head 2245b, the upper clamping head 2245a is disposed at the bottom end of the movable clamping plate body 2243a, the lower clamping head 2245b is disposed at the top end of the front portion of the fixed clamping plate 2244, the two clamping heads are mutually matched, and clamping surfaces of the upper clamping head 2245a and the lower clamping head 2245b for directly clamping the flexible circuit board 60 are in a zigzag shape;

the clip 224 further includes two first links 2246a and two second links 2246b, wherein upper portions of the two first links 2246a are connected to rear ends of both sides of the push block 2242 and the movable clamp 2243 by a first rotating shaft 2247a, lower portions of the two first links 2246a are connected to front ends of the middle portion of the fixed clamp 2244 by a second rotating shaft 2247b, upper portions of the two second links 2246b are connected to middle ends of both sides of the movable clamp 2243 by a third rotating shaft 2247c, and lower portions of the two second links 2246b are connected to rear ends of the front portion of the fixed clamp 2244 by a fourth rotating shaft 2247 d.

The movable clamping plate 2243 further comprises a hollow part 2243c surrounded by the movable clamping plate body 2243a and two side parts 2243b, the push block 2242 comprises a push block body 2242a connected with the air cylinder 2241 and a protruding part 2242b protruding out of the push block body 2242a, the protruding part 2242b extends into the hollow part 2243c and is connected with the two side parts 2243b and the first connecting rod 2246a of the movable clamping plate 2243 through the first rotating shaft 2247a, and the two first connecting rods 2246a are arranged at two sides of the protruding part 2242b and are arranged in the hollow part 2243 c; wherein, the upper both sides of the first link 2246a are respectively attached to the boss 2242b and the side 2243b of the movable clamp 2243.

In addition, two sides of the middle part of the fixed clamping plate 2244 are provided with stepped baffles towards the vertical direction, and a limiting space 22441 for accommodating and guiding the pushing block to horizontally transfer is formed between the two baffles; wherein, the pushing block body 2242a is disposed in the limiting space 22441, and two sides of the pushing block body 2242a are attached to the sides of the baffle.

When the clip 224 is in the original state, the push block body 2242a of the push block 2242 is disposed in the rear end of the limit space 22441, the movable clamping plate 2243 is close to the limit space 22441, the first rotating shaft 2247a is located at the first position of the protruding part 2242b, and the upper chuck 2245a and the lower chuck 2245b obliquely correspond and are far away from the lower chuck 2245b;

when the clip 224 is in the engaged state, the pusher body 2242a is moved forward and positioned at the front end of the spacing space 22441, the movable clamping plate 2243 is moved away from the spacing space 22441, the first rotating shaft 2247a is moved forward and positioned at the second position of the boss 2242b, and the upper collet 2245a is positioned directly above the lower collet 2245b and engaged with the lower collet 2245 b.

The protruding portion 2242b of the pushing block 2242 is provided with a gap 2242c for the first rotating shaft 2247a to move up and down, the first rotating shaft 2247a passes through the gap 2242c and is connected with two side portions 2243b of the movable clamping plate 2243, and the first position is that the first rotating shaft 2247a is located at the top end of the gap 2242c, and the second position is that the first rotating shaft 2247a is located at the bottom end of the gap 2242 c.

Specifically, in the process of the clip 224 moving from the original state toward the engaged state, the air cylinder 2241 pushes the push block 2242 to move horizontally forward, and the push block 2242 simultaneously pushes the first rotating shaft 2247a and the movable clamping plate 2243 to move forward, and at this time, since the lower ends of the first link 2246a and the second link 2246b connected to the movable clamping plate 2243 are rotatably fixed to both sides of the fixed clamping plate 2244, the movable clamping plate 2243 simultaneously moves downward with the second rotating shaft 2247b as a turning point through the first link 2246a and with the fourth rotating shaft 2247d as a turning point through the second link 2246b, and at the same time, the first rotating shaft 2247a gradually moves from the top end of the notch 2242c toward the bottom end of the notch 2242c until the upper clamping head 2245a bites the fixed lower clamping head 2245 b. That is, as the push block 2242 is pushed forward, the movable clamp 2243 moves forward and downward continuously at the same time.

It will be apparent that by providing the first link 2246a and the second link 2246b together, the clip 224 can be made to perform a double link co-operation, improving the stability of the bite of the clip 224.

Because the movable clamping plate 2243 can be downwards meshed when the single connecting rod (such as the second connecting rod 2246 b) is adopted for the meshing, the connecting point of the second connecting rod 2246b and the movable clamping plate 2243 is two points, and a structure with one surface is not formed, so that the meshing of the movable clamping plate 2243 is not stable; the arrangement of the double connecting rods, namely the first connecting rod 2246a and the second connecting rod 2246b, forms a complete surface structure because the connection points of the two connecting rods and the movable clamping plate 2243 are four points, so that the movable clamping plate 2243 moves down more stably to be engaged.

Further, since the first link 2246a vertically disposed is attached to the inner wall of the side portion of the movable clamping plate 2243, and the second link 2246b vertically disposed is attached to the outer wall of the side portion of the movable clamping plate 2243, the connection points of the first link 2246a and the second link 2246b with the movable clamping plate 2243 form an isosceles trapezoid in the same horizontal plane, and it is obvious that the stability of the isosceles trapezoid structure is higher than that of the parallelogram structure in terms of mechanics. This arrangement thus makes the movable clamp 2243 more stable during occlusion.

In addition, the two side surfaces of the upper part of the first link 2246a are respectively attached to the protruding part 2242b and the inner wall of the side part 2243b of the movable clamping plate 2243, and the second link 2246b is attached to the outer wall of the side part of the movable clamping plate 2243, so that when the push block 2242 drives the movable clamping plate 2243, the first link 2246a is prevented from shifting in the hollowed-out part 2243c of the movable clamping plate 2243, thereby driving the movable clamping plate 2243 to shift, and further improving the accuracy and stability of the occlusion between the movable clamping plate 2243 and the front part of the fixed clamping plate 2244;

because the saw teeth on the clamping surfaces of the upper and lower clamps 2245a and 2245b are engaged with each other in a staggered manner, once the movable clamping plate 2243 is shifted, the saw teeth of the upper clamp 2245a and the saw teeth of the lower clamp 2245b arranged at the bottom end of the movable clamping plate body 2243a are likely to be opposite to each other, that is, the saw teeth of the upper and lower clamps are not engaged with each other in a staggered manner, so that the engagement of the upper and lower clamps is unstable, the two side surfaces of the upper part of the first connecting rod 2246a are respectively attached to the protruding part 2242b and the side part 2243b of the movable clamping plate 2243, and the second connecting rod 2246b is attached to the outer wall of the side part of the movable clamping plate 2243, thereby avoiding the phenomenon. Of course, the lower side surfaces of the first link 2246a and the second link 2246b are uniformly attached to the fixing clip 2244.

Further, since the clamping surfaces of the upper and lower chucks are serrated, when the movable clamping plate 2243 and the fixed clamping plate 2244 have slight deviation, the tip of the serration of the upper chuck 2245a falls on the bevel edge of the serration of the lower chuck 2245b or the tip of the serration of the lower chuck 2245b abuts against the bevel edge of the upper chuck 2245a, but cannot precisely fall on the groove bottom between the serration of the lower chuck 2245b, and the clamping surfaces are serrated, and the bevel edge of the serration has guiding function, so that the serration of the upper chuck 2245a can be completely guided into the groove between the serration of the lower chuck 2245b, thereby tightly biting.

Specifically, when the clip 224 is in the original state, the first, preferably, the height of the notch 2242c is slightly greater than the sum of the height of the clip surface of the upper and lower clips 2245a, 2245b in the vertical direction and the thickness of the first rotating shaft 2247 a. Because the distance that the first rotating shaft 2247a vertically moves in the gap 2242c is exactly equal to the distance that the upper jaw 2245a moves in the vertical direction when the movable clamping plate 2243 is pressed down so that the clamping surface of the upper jaw 2245a and the clamping surface of the lower jaw 2245b mutually bite, and the distance that the first rotating shaft 2247a vertically moves in the gap 2242c is slightly larger than the distance that the upper jaw 2245a moves in the vertical direction in order to make the upper and lower jaws 2245a, 2245b bite the flexible circuit board 60 more tightly, i.e., the height of the gap 2242c is slightly larger than the sum of the height of the clamping surfaces of the upper and lower jaws 2245a, 2245b in the vertical direction and the thickness of the first rotating shaft 2247 a. The slightly larger distance satisfies the deformation distance of the upper and lower clamps 2245a, 2245b in the vertical direction in engagement.

Second, it is preferable that the heights of the first link 2246a and the second link 2246b are equal. Because if the movable clamping plate 2243 is inclined in a horizontal direction in a plane inclined toward the lower jaw 2245b when the clip 224 is in the engaged state when the height of the first link 2246a is higher than the height of the second link 2246b, the engaged portions of the upper jaw 2245a and the lower jaw 2245b are concentrated at the foremost ends of each other, which results in a reduction in the clamping effective area of the flexible circuit board 60 to thereby reduce the clamping degree, and on the other hand, in the engaged concentrated portions to be easily worn out to reduce the service lives of the upper and lower jaws 2245a, 2245 b; if the movable jaw 2243 is inclined in a horizontal direction to form an inclined plane toward the second rotating shaft 2247b when the clip 224 is in the engaged state when the height of the first link 2246a is lower than the height of the second link 2246b, so that the upper and lower jaws 2245a, 2245b cannot engage each other; therefore, when the heights of the first link 2246a and the second link 2246b are equal, the plane of the movable clamping plate 2243 in the horizontal direction is a plane parallel to the horizontal plane, which makes the clamping surfaces of the upper and lower chucks 2245a and 2245b perform surface-to-surface engagement, increases the engagement area, improves the tightness of the engagement, and improves the service lives of the upper and lower chucks 2245a and 2245 b. The heights of the first link 2246a and the second link 2246b are as follows: the height between the upper and lower ends of the first link 2246a and the connection of the movable and fixed jaws 2243 and 2244, respectively, and the height between the upper and lower ends of the second link 2246b and the connection of the movable and fixed jaws 2243 and 2244, respectively.

Third, it is preferable that the axes of the first link 2246a and the second link 2246b are perpendicular to the plane in which the fixed jaw 2244 is located in the horizontal direction, because when the axes of the first link 2246a and the second link 2246b are perpendicular to the plane in which the fixed jaw 2244 is located in the horizontal direction, the height of the movable jaw 2243 with respect to the fixed jaw 2244 is highest, so that the movable jaw 2243 moves from the rear upper direction to the front lower direction rapidly, and at the same time, the horizontal distance between the lower jaw 2245b and the upper jaw 2245a is farthest so that the flexible circuit board 60 is smoothly overlapped on the lower jaw 2245 b.

Of course, under the premise that the flexible circuit board 60 can be smoothly overlapped on the lower chuck 2245b, the included angle between the axes of the first link 2246a and the second link 2246b and the plane of the fixing clamp 2244 in the horizontal direction facing the lower chuck 2245b may be smaller than 90 °.

Fourth, it is preferable that the first link 2246a and the second link 2246b are both track-shaped, wherein both of them are formed by semicircular upper and lower sections and rectangular middle sections, and the apexes of the upper and lower sections are flush with the top surface of the movable clamp 2243 and the bottom surface of the fixed clamp 2244, respectively, and the centers of the joints of the upper and lower sections of the first link 2246a and the movable clamp 2243 and the fixed clamp 2244 are disposed at the centers of the semicircular upper and lower sections, and the centers of the joints of the upper and lower sections of the second link 2246b and the movable clamp 2243 and the fixed clamp 2244 are disposed at the centers of the semicircular upper and lower sections, respectively. By the arrangement, the movable clamping plate 2243 and the fixed clamping plate 2244 can correspondingly rotate the first connecting rod 2246a and the second connecting rod 2246b in the process of meshing, and the top points of the upper section and the lower section of the first connecting rod 2246a and the second connecting rod 2246b are always flush with the top surface of the movable clamping plate 2243 and the bottom surface of the fixed clamping plate 2244 respectively in the process of rotating, so that the possibility that the meshing is affected because the first connecting rod 2246a and the second connecting rod 2246b touch external objects in the process of rotating is reduced. Of course, in the present invention, the top points of the upper and lower sections are not limited to be flush with the top surface of the movable clamping plate 2243 and the bottom surface of the fixed clamping plate 2244, but may be the top point lower than the top surface of the movable clamping plate 2243 and the bottom point higher than the bottom surface of the fixed clamping plate 2244. It should be noted that, the upper portion of the first link 2246a includes an upper section and a partial middle section of the first link 2246a, and the lower portion of the first link 2246a includes a lower section and a partial middle section of the first link 2246 a; the upper and lower portions of the second link 2246b are identical in structure to the upper and lower portions of the first link 2246 a.

In order to facilitate movement of the first shaft 2247a in the notch 2242c, the first shaft 2247a is preferably cylindrical, the notch 2242c is a race track formed by semicircular upper and lower ends and rectangular middle ends, and the diameter of the first shaft 2247a is equal to the width of the middle end of the notch 2242c and the outer peripheral surface of the first shaft 2247a is fitted with the upper and lower ends of the notch 2242 c.

In addition, the two sides of the push block body 2242a are mutually attached to the two baffles of the limiting space 22441, so that the push block body 2242a always moves against the inner walls of the two baffles in the moving process, and the moving accuracy and stability of the push block 2242 are improved.

In the preferred embodiment of the present invention, a positioning slot for installing the cylinder 2241 is provided on the rear portion of the fixing clamp 2244, and a support bar with a right triangle cross section is provided above the rear end of the positioning slot; wherein, the vertical face of this support bar flushes with the rear end face of this constant head tank, and the rear end face of cylinder 2241 supports the vertical face of this support bar.

It is apparent that when the cylinder 2241 pushes the push block 2242 to drive the movable clamp 2243 and the fixed clamp 2244 to bite, when the movable clamp 2243 and the fixed clamp 2244 are meshed instantly, due to the action of the first link 2246a and the second link 2246b, the movable clamp 2243 indirectly generates a reverse thrust to the cylinder 2241, so that the cylinder 2241 receives a reverse force, and after the use time is long, the cylinder 2241 is loosened, so that the stability of the movable clamp 2243 for biting is further affected. The support bars are provided to strengthen the bearing degree of the cylinder 2241 against the reverse force, so as to ensure the stability of the cylinder 2241.

On the other hand, the stepped baffles on two sides of the limiting space 22441 are arranged, wherein the height of one end of each baffle, which is close to the cylinder 2241, is higher than the height of one end, which is close to the movable clamping plate 2243, and the end, which is close to the cylinder 2241, is the rear end, and the end, which is far away from the cylinder 2241, is the front end. So configured, when the clip 224 is in the original state, the push block body 2242a of the push block 2242 is located at the rear end of the restricting space 22441, and the portion of the movable clamp plate 2243 connected to the boss 2242b is located at the upper part of the front end of the restricting space 22441. Therefore, the step-shaped baffle plates are adopted, so that the space of the whole clamp 224 is fully utilized, the size of the clamp 224 is reduced, and the installation space is saved.

In addition, the hollowed-out portion 2243c is arranged, so that the weight of the movable clamping plate 2243 is greatly reduced, and the driving force provided by the air cylinder 2241 is reduced. On the other hand, due to the matching arrangement of the protruding portion 2242b and the hollowed portion 2243c, not only is the space for connecting the pushing block 2242 with the movable clamping plate 2243 saved, but also the pushing of the pushing block 2242 to the movable clamping plate 2243 is more stable.

In the preferred embodiment, the first X-track 222 is further provided with a slider assembly 227, as shown in fig. 8, the slider assembly 227 includes a first Y-track 227b sliding on the first Y-track 221, and an inverted "L" shaped slider fixing block 227a fixedly connected to two ends of the first X-track 222 for fixing the first Y-track 227 b; the locking part 223 includes a locking knob 223a of a star structure, a connection screw 223b provided at the bottom of the locking knob 223a, and a top block 223c provided at the bottom of the connection screw 223 b;

The locking knob 223a is disposed on an upper surface of a lateral portion of the slider fixing block 227a, the connecting screw rod 223b passes through the lateral portion of the slider fixing block 227a and is in threaded connection with the lateral portion of the slider fixing block 227a, and the top block 223c is disposed right above the first Y guide rail 221 and is used to abut against the first Y guide rail 221.

Specifically, the vertical portion of the slider fixing block 227a is fixedly coupled to both side ends of the first X-guide rail 222, the lateral portion thereof is coupled to the locking member 223, and the first Y-direction slider 227b is disposed at the rear of the locking member 223 and is fixed to the bottom of the lateral portion of the slider fixing block 227 a.

Alternatively, the top block 223c is made of a soft material, such as rubber, nylon, etc., so that when the first X-direction guide rail 222 needs to be fixed, the top block 223c will not crush the first Y-direction guide rail 221 during the locking process of the locking member 223; alternatively, the number of the locking members 223 is 4, however, the number of the locking members 223 in the preferred embodiment is not limited to 4, for example, greater than 4. Wherein, the flexible top block 223c is arranged to avoid the top block 223c from pressing the first Y-guide rail 221.

In a preferred embodiment of the present invention, the feeding mechanism comprises a feeding placement stage 11 and a feeding robot arm 12, wherein, as shown in fig. 9, the feeding placement stage 11 comprises a fixed stage 111, a placement stage 112, a second Y-guide rail 114a, a second X-guide rail 115a, a second Y-slider 114b, a second X-slider 115b, a Y-motor 114d, an X-motor 115d, and a limiting member 116.

The limiting component 116 is used for adjusting the flexible circuit board 60 placed on the placement platform 112 to be centered on the placement platform 112, and is arranged on the second Y-direction sliding block 114b and the second X-direction sliding block 115b, and the limiting component 116 penetrates through and protrudes out of the placement platform 112; the placing platform 112 is arranged above the feeding mechanism, and an opening 112a for limiting the movement of the component 116 is arranged on the placing platform 112; the fixed platform 111 is arranged below the placing platform 112 and is fixedly connected with the placing platform 112 through the fixed column 113;

two second Y-direction sliders 114b slidably mounted on a second Y-direction rail 114a located at the middle of the fixed platform 111 in the longitudinal direction for driving the stopper 116 to slide along the second Y-direction rail 114 a; two second X-direction sliders 115b slidably mounted on a second X-direction guide rail 115a located at the middle of the lateral direction of the fixed platform 111 for driving the stopper 116 to slide along the second X-direction guide rail 115 a;

the Y-direction motors 114d are connected to the two second Y-direction sliders 114b through Y-direction screws 114c for driving the second Y-direction sliders 114b to slide, and the Y-direction motors 114d are arranged at the edge of the fixed platform 111 and located in the extending direction of the second Y-direction guide rails 114 a; the X-direction motors 115d are connected to the two second X-direction sliders 115b through X-direction screws 115c for driving the second X-direction sliders 115b to slide, and the X-direction motors 115d are disposed at the edge of the fixed platform 111 and located in the extending direction of the second X-direction guide rails 115 a;

The limiting member 116 is a baffle, and the placement platform 112 is further provided with an opening 112a for moving the baffle. The four openings 112a are arranged on the placement platform 112 in a cross shape, but the four openings 112a are not connected.

When the flexible circuit board 60 is placed on the placement platform 112, the Y-directional motor 114d and the X-directional motor 115d are turned on and respectively drive the Y-directional screw 114c and the X-directional screw 115c to rotate, and the Y-directional screw 114c and the X-directional screw 115c respectively drive the Y-directional slider 114b and the X-directional slider 115b to move on the second Y-directional slide rail 114a and the second X-directional slide rail 115a simultaneously towards the center of the fixed platform 111, and at the same time, the baffle moves along with the Y-directional slider 114b and the X-directional slider 115b towards the center of the placement platform 112, so that the flexible circuit board 60 on the placement platform 112 is centered on the placement platform 112, and then the flexible circuit board 60 on the placement platform 112 is sucked and moved to the clamping plate tray 21 by the feeding mechanical arm 12. In this way, the consistency of the placement of the flexible circuit board 60 can be ensured, the precision is improved, and the efficiency in the whole detection process is also improved.

In addition, since the length of the limiting member 116 is relatively long, the stability of the limiting member 116 in adjusting the position of the flexible circuit board 60 is affected to some extent, and considering this problem, in the preferred embodiment, the limiting member 116 is fixedly connected to the tops of the Y-direction slider 114b and the X-direction slider 115b on the side facing away from the flexible circuit board 60 through a right-angle triangular support plate, wherein two right-angle sides of the triangular support plate, one side is fixed to the limiting member 116, and the other right-angle side is fixed to the corresponding Y-direction slider 114b and X-direction slider 115b.

In the preferred embodiment of the present invention, the CCD alignment mechanism comprises two sets of CCD alignment units 30 for photographing and capturing each test MARK point on the flexible circuit board 60 and arranged opposite to each other.

As shown in fig. 10 and 11, the CCD alignment unit 30 includes a CCD camera 31, an object telecentric lens 32 connected to the CCD camera 31, a lens fixing member 33 for fixing the object telecentric lens 32, and a right angle prism 34 provided in the lens fixing member 33 and capable of deflecting incident light by 90 °.

Wherein the CCD camera 31, the object telecentric lens 32 and the lens fixing part 33 are coaxial and horizontally placed.

In the preferred embodiment, due to the arrangement of the right-angle prism 34, the CCD alignment unit 30 can be horizontally arranged on the first main X-direction guide rail, so that the horizontal view of the CCD camera 31 is converted into the vertical view through the right-angle prism 34, thereby saving the installation space in the vertical direction.

In addition, the upper and lower sets of CCD alignment units 30 move in the directions of the two first main X-direction guide rails, respectively, and the moving platform 22 moves on the main Y-direction guide rails, which are combined to form a CCD alignment system, and the CCD alignment system photographs MARK points on each test unit of the flexible circuit board 60 to calculate position deviations.

Specifically, as shown in fig. 10, the lens fixing member 33 includes a fixing portion 331, a housing portion 332, a connecting portion 333, an observation portion 334, and a light source receiving portion 335.

The fixing part 331 is used for fixedly connecting the object image telecentric lens 32; the accommodating part 332 is provided at one side of the fixing part 331, and includes an accommodating chamber provided inside the accommodating part 332 for accommodating the right angle prism 34 and an opening 332a provided at the top of the accommodating chamber and communicating with the accommodating chamber; the connection part 333 extends from one end of the fixing part 331 and is fixedly connected to the accommodating part 332; the observation part 334 is used for observing the fixing condition of the object image telecentric lens 32, and is surrounded by the fixing part 331, the connecting part 333 and the accommodating part 332; the light source receiving part 335 is for receiving external light, and is disposed at the opening 332a and protrudes from the accommodating part 332.

Wherein object telecentric lens 32 passes through fixed portion 331 and viewing portion 334 and protrudes into the receiving cavity of receiving portion 332. Since the object-image telecentric lens 32 passes through the fixing portion 331 and extends into the accommodating portion 332, the object-image telecentric lens 32 is fixedly connected with the front end wall of the accommodating portion 332 when extending into the accommodating portion 332, and thus the object-image telecentric lens 32 is doubly fixed, and the stability of the object-image telecentric lens 32 is improved.

It should be noted that, the CCD alignment unit 30 further includes a square sleeve for placing the right-angle prism 34, the right-angle prism 34 is fixed in the sleeve, the top of the sleeve is provided with a notch communicating with the interior of the sleeve, the notch faces the light source receiving portion 335, the sleeve is disposed in the accommodating portion 332, and the right-angle prism 34 in the sleeve faces the object telecentric lens 32 disposed on one side of the right-angle prism 34 and the notch disposed above the right-angle prism 34.

In the preferred embodiment, referring to fig. 12, the testing mechanism includes two testing units 40 disposed opposite to each other, and the testing units 40 include a fixed platform 41, a first sliding platform 42, a second sliding platform 43, a Y-direction fine tuning subunit 44, a lifting subunit 45, a corner fine tuning subunit 46, a fixture fixing plate 47, and a testing fixture 48.

The fixed platform 41 is provided with a third X-direction guide rail 41a and a first sliding platform driving part 41b for driving the first sliding platform 42 to move on the third X-direction guide rail 41 a; the first sliding platform 42 is disposed on the third X-direction guide rail 41a and is slidably connected to the third X-direction guide rail 41a through a first slider, and includes a third Y-direction guide rail 42a fixedly disposed on a surface facing away from the fixed platform 41; the second sliding platform 43 is arranged on the third Y-direction guide rail 42a, and the second sliding platform 43 is in sliding connection with the third Y-direction guide rail 42a through a second sliding block;

the Y-direction fine tuning subunit 44 is configured to perform corresponding fine tuning on the test fixture 48 according to the Y-direction deviation calculated by the CCD alignment mechanism, and is disposed on a surface of the second sliding platform 43 opposite to the third Y-direction guide rail 42a; the lifting subunit 45 is configured to drive the test fixture 48 to move up and down, and pass through the fixed platform 41, the first sliding platform 42, and the second sliding platform 43 and is connected to the fixture fixing plate 47; the corner fine adjustment subunit 46 is configured to perform corresponding fine adjustment on the test fixture 48 according to the corner deviation calculated by the CCD alignment mechanism, and is fixedly disposed on one side of the fixture fixing plate 47; the test fixture 48 is fixed on a surface of the fixture fixing plate 47 facing away from the second sliding platform 43 through a fixture.

In addition, a boss is provided in a middle area of the clamp fixing plate 47 on one face of the test jig 48, grooves for fixing the clamps are provided on both sides of the boss, and the test jig 48 is fixed to the boss by two clamps.

The upper and lower test units 40 respectively perform corresponding fine adjustment according to the position deviation calculated by the CCD alignment system, and then the upper and lower test jigs 48 are pressed towards the flexible circuit board 60 at the same time, so that the upper and lower test jigs 48 are ensured to contact the flexible circuit board 60 at the same time when the test jigs 48 move. The up-and-down test unit 40 moves on the second main X-direction rail and the moving platform 22 moves on the main Y-direction rail, thereby constituting the whole test system, and testing each test unit on the flexible circuit board 60.

In a preferred embodiment of the present invention, as shown in fig. 13 to 16, the elevation sub unit 45 includes an elevation motor 451, a motor bracket 452, a base 453, a stabilizer plate 454, a test head connection block 455, a ball screw 456, a first spline shaft 457a, a second spline shaft 458a, a first spline housing 457b, and a second spline housing 458b.

Wherein, the lifting motor 451 is used for driving the test fixture 48 to move up and down;

the motor bracket 452 includes an upper fixing plate 452a provided at the top of the motor bracket 452, a lower fixing plate 452b provided below the upper fixing plate 452a, and a stabilizing column 452c fixedly connected to the upper fixing plate 452a and the lower fixing plate 452b, and the lifting motor 451 is fixed to the upper fixing plate 452 b;

The base 453 is arranged below the motor bracket 452 and comprises a stepped accommodating space which is arranged in the base 453 and penetrates through the base 453; the stabilizing plate 454 is disposed between the lower fixing plate 452b and the base 453 with a space from the lower fixing plate 452 b; the test head connecting block 455 is disposed below the base 453, and the longitudinal section of the test head connecting block 455 is in an inverted "convex" shape; the ball screw 456 is used for driving the first spline shaft 457a to move up and down, is connected to the lifting motor 451, passes through the stabilizing plate 454 and extends into the accommodating space;

the first spline shaft 457a is used for driving the test head connecting block 455 to move up and down, is arranged between the stabilizing plate 454 and the test head connecting block 455 and is fixed on the outer peripheral side of the stabilizing plate 454, and the first spline shaft 457a penetrates through the base 453 to be connected to the test head connecting block 455; a second spline shaft 458a is fixed between the lower fixing plate 452b and the base 453, and the second spline shaft 458a passes through the stabilizing plate 454 to be fixedly connected to the base 453; the first spline housing 457b is sleeved on the first spline shaft 457a and is respectively fixed on the top of the base 453 and the top of the test head connecting block 455; the second spline housing 458b is sleeved on the second spline shaft 458a and fixed to the top of the stabilizer plate 454.

Wherein the first spline shaft 457a and the second spline shaft 458a are respectively disposed in the circumferential direction of two different circles having the ball screw 456 as the central axis, and the first spline shaft 457a and the second spline shaft 458a are alternately disposed.

The ball screw 456 is rotatably connected to the stabilizing plate 454, so that the lifting motor 451 drives the ball screw 456 to rotate, the ball screw 456 drives the stabilizing plate 454 to move up and down, at this time, the first spline shaft 457a fixedly connected to the stabilizing plate 454 moves up and down along with the stabilizing plate 454, and the first spline shaft 457a drives the test machine head connecting block 455 to move up and down.

It should be noted that, the first spline housing 457b and the second spline housing 458a are fixedly arranged, and respectively guide the corresponding first spline housing 457a and second spline housing 458b, so that the test fixture 48 moves up and down more stably and has larger rigidity. On the other hand, the first spline shaft 457a and the second spline shaft 458a are respectively and uniformly arranged in the circumferential direction, and further, the stress of the first spline shaft 457a and the second spline shaft 458a on the whole lifting subunit is balanced, so that the stability and the accuracy of lifting motion are provided.

In the preferred embodiment, there are four first spline shafts 457a, eight first spline housing 457b, four second spline shafts 458a, and four second spline housings 458 b. Four first spline shafts 457a are arranged on the same circumference, four second spline shafts 458a are arranged on the other circumference, and the first spline shafts 457a and the second spline shafts 458a are alternately arranged. This arrangement minimizes the loss of rigidity of the stabilizing plate 454 and the base 453 to ensure rigidity of the lifting subunit 45 during lifting.

Of course, the number of the first spline shaft 457a and the second spline shaft 458a is not limited to four, and may be greater than four and less than four, such as three, six, and the like.

In addition, a stopper is disposed in the middle of the outer periphery of the base 453, the stopper is disposed around the outer periphery of the base 453, a second sliding platform 43 is fixedly connected to one surface of the stopper facing the stabilizing plate 454, and the second sliding platform 43 is sleeved on the outer periphery of the base 453.

In addition, in the process of testing the flexible circuit board 60, the plurality of test pins on the test fixture 48 simultaneously test the test points of the flexible circuit board 60, if the test fixture 48 is not rotatable, for example, when two test pins need to test two test points simultaneously, and after the two test pins and the two test pins are subjected to fine adjustment in the X-axis direction and the Y-axis direction, only one test pin can ensure that an accurate alignment test is performed for one test point, and another test pin cannot always perform an accurate alignment test with another test point, so in consideration of such a problem, an angle-of-rotation fine adjustment subunit 46 is provided in the test unit 40 in the present invention.

In a preferred embodiment of the present invention, referring to fig. 17 and 18, a corner guide rail is disposed on a side of the fixture fixing plate 47 having the corner fine adjustment subunit 46, and the corner fine adjustment subunit 46 includes a corner slider 461 sliding on the corner guide rail, a corner motor 462 disposed side by side with the corner slider 461 and used for driving the corner slider 461 to slide, and a corner adjustment block 463 rotatably connected to the corner slider 461;

wherein, the corner adjustment block 463 includes a horizontal portion 463a disposed horizontally and a vertical portion 463b fixed on one side of the horizontal portion 463a and disposed vertically, one side of the corner slider 461 is connected with the corner motor 462 through a corner ball screw 464, the top of the corner slider 461 is rotationally connected with the horizontal portion 463a of the corner adjustment block 463 through a corner adjustment shaft 465, and the vertical portion 463b of the corner adjustment block 463 is fixedly connected to the outer peripheral side of the test machine head connecting block 455.

Wherein, in order to facilitate the disassembly of the corner adjusting block, the transverse portion 463a and the longitudinal portion 463b are fixedly connected by a screw; to facilitate the installation of the corner trim subunit 46, two positioning grooves for installing the corner trim subunit 46 are provided on the side of the fixture fixing plate 47 facing the test head connection block 455.

Based on the above-described construction, in order to ensure more accurate calculation and angular adjustment to follow, in the preferred embodiment of the present invention, the clamp-securing plate 47 is rotatably connected to the test head connection block 455 via the cross-roller collar 471.

When the corner fine adjustment subunit 46 is fine-tuned, the corner motor 462 drives the corner screw 464 to rotate, the corner screw 464 drives the corner slide block 461 to move, at this time, since the corner adjustment block 463 is fixedly connected to the fixed test head connecting block 455, and the corner slide block 461 is rotatably connected to the corner adjustment block 463 through the corner adjustment shaft 465, and the test head connecting block 455 is rotatably connected to the fixture fixing plate 47 through the cross roller collar 471, when the corner slide block 461 moves, the fixture fixing plate 47 fixedly connected to the corner fine adjustment subunit 46 is made to perform corner angle adjustment by rotating around the cross roller collar 471, so that the test fixture 48 fixed on the fixture fixing plate 47 performs corner angle adjustment.

In addition, in the preferred embodiment, the fully automatic flexible circuit board testing machine 100 is in a two-wire operation mode, and optionally, for example, the fully automatic flexible circuit board testing machine 100 has two conveying mechanisms, so that the fully automatic flexible circuit board testing machine 100 has two main Y-direction guide rails arranged in parallel to each other, so that the two conveying mechanisms can alternately operate to provide the detection efficiency.

For example, when one mobile platform 22 performs board placement, board removal and CCD alignment, the other mobile platform 22 is sending the flexible circuit board 60 under the test unit 40 for testing.

In the preferred embodiment, the discharging mechanism comprises a discharging placing table 51 and a discharging mechanical arm 52, and the discharging placing table 51 comprises a discharging PASS placing table and a discharging FALL placing table which is arranged side by side with the discharging PASS placing table.

In addition, in order to improve the accuracy and the application range of the detection of the flexible circuit board 60 in the preferred embodiment, the test mode of the preferred embodiment includes a two-wire test and a four-wire test, wherein, as shown in fig. 19, the four-wire test circuit includes: the power supply, the first feeder resistor R1, the second feeder resistor R2, the ammeter, the line resistor Rcb to be tested, the third feeder resistor R3, the fourth feeder resistor R4 and the voltmeter. The power supply, the first feeder resistor R1, the line resistor Rcb to be tested, the second feeder resistor R2 and the ammeter are sequentially connected to form a current supply loop; the third feeder resistor R3, the line resistor Rcb to be tested, the fourth feeder resistor R4 and the voltmeter are sequentially connected to form a voltage measuring loop.

V.about.I1xRtcb (smaller voltage drop is obtained by multiplying I2 (small current) by small resistance), the internal impedance of the voltmeter is very high (M omega level), so that almost all current flows through Rtcb and the current I2 flowing through the voltmeter is almost zero, so that the measured voltage is almost the voltage drop of Rtcb, the feeder resistance is completely negligible, and the measured Rtcb is almost similar to Rtcb, therefore, the tiny resistance value of the tested circuit board can be precisely measured, and the testing precision of four-line test can reach M omega level.

The flexible circuit board 60 is tested in the preferred embodiment as follows:

firstly, the feeding placing table 11 is driven by a stepping motor to move up and down, the flexible circuit board 60 is sent to a fixed height, and the feeding mechanical arm 12 is driven by a servo motor to move to the position above the placing platform 112 of the feeding placing table 11; meanwhile, after the moving platform 22 moves to the initial position, the clamping plate tray 21 passes through the middle part of the moving platform 22 and rises to the placement position of the flexible circuit board 60;

next, the feeding robot arm 12 sucks and places the flexible circuit board 60 onto the pallet 21 that has been lifted to the placement position by the vacuum chuck; the clamping plate tray 21 is lowered to the clamping position of the movable platform 22, at this time, four clamps 224 of the movable platform 22 clamp four corners of the flexible circuit board 60, after the flexible circuit board 60 is clamped, one clamp 224 is fixed, and the other three clamps 224 are tensioned towards the opposite direction of the fixed clamp 224, so that the flexible circuit board 60 is clamped flat;

then, the clamping plate tray 21 continues to descend to the initial position, the moving platform 22 moves between the upper CCD alignment unit 30 and the lower CCD alignment unit 30, the CCD camera 31 photographs the MARK point of each test unit on the flexible circuit board 60, and the position deviation is calculated;

Secondly, the mobile platform 22 moves between the upper test unit 40 and the lower test unit 40, the test jigs 48 of the upper test unit 40 and the lower test unit 40 are respectively and correspondingly fine-tuned according to the calculated deviation of the CCD alignment system, then the upper test jigs 48 and the lower test jigs 48 move simultaneously to press the flexible circuit board 60, the upper test jigs 48 need to contact the flexible circuit board 60 at the same time when pressing, the upper test jigs 48 contact the flexible circuit board 60, then two-line or four-line test is started, each test unit on the flexible circuit board 60 is tested through the movement of the test jigs 48 and the mobile platform 22, and the mobile platform 22 moves to the board taking position after the test is completed;

finally, the discharging mechanical arm 52 is driven by a servo motor, moves to a board taking position, absorbs the tested flexible circuit board 60 through a vacuum chuck, and then places a corresponding testing result platform discharging FALL placing table or a discharging PASS placing table.

This completes the test procedure of the preferred embodiment.

While the present disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The present disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, units, etc.), the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the disclosure. Furthermore, while a particular feature of the disclosure may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for a given or particular application. Moreover, to the extent that the terms "includes," has, "" contains, "or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term" comprising.

In summary, although the embodiments of the present invention have been described above, the numbers before the embodiments, such as "first" and "second", are used for convenience of description, and the order of the embodiments of the present invention is not limited. Moreover, the above-mentioned embodiments are not intended to limit the present invention, and those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, so the scope of the present invention is defined by the claims.

Claims

1. The full-automatic flexible circuit board testing machine is characterized by comprising a feeding mechanism with a feeding placing table, a conveying mechanism, a CCD alignment mechanism, a testing mechanism and a discharging mechanism with a discharging placing table;

the conveying mechanism comprises:

Wherein, the clip includes:

the air cylinder is provided with a plurality of air cylinders,

2. The full-automatic flexible circuit board testing machine according to claim 1, wherein two sides of the middle part of the fixed clamping plate are provided with stepped baffles towards the vertical direction, and a limiting space for accommodating and guiding the pushing block to horizontally transfer is formed between the two baffles;

3. The full-automatic flexible circuit board testing machine according to claim 1, wherein a positioning groove for installing the air cylinder is arranged on the rear part of the fixed clamping plate, and a supporting bar with a right triangle cross section is arranged above the rear end of the positioning groove;

4. The fully automatic flexible circuit board testing machine according to claim 1, wherein the first X-direction guide rail is further provided with a slide block assembly, the slide block assembly comprises a first Y-direction slide block sliding on the first Y-direction guide rail, and a slide block fixing block fixedly connected to two ends of the first X-direction guide rail and used for fixing the first Y-direction slide block; the locking component comprises a locking knob with a star-shaped structure, a connecting screw rod arranged at the bottom of the locking knob and a top block arranged at the bottom of the connecting screw rod;

5. The fully automatic flexible circuit board testing machine of claim 1, wherein the feeding mechanism comprises a feeding placement stage and a feeding mechanical arm, the feeding placement stage comprising:

6. The fully automatic flexible circuit board testing machine according to claim 1, wherein the CCD alignment mechanism includes two sets of CCD alignment units for photographing each test MARK point on the flexible circuit board and disposed opposite to each other up and down, and the CCD alignment units include: the device comprises a CCD camera, an object image telecentric lens connected with the CCD camera, a lens fixing component for fixing the object image telecentric lens, and a right-angle prism which is arranged in the lens fixing component and can deflect incident light by 90 degrees;

7. The fully automatic flexible circuit board testing machine according to claim 6, wherein the lens fixing part comprises;

8. The fully automatic flexible circuit board testing machine according to claim 1, wherein the testing mechanism comprises two testing units arranged in a vertically opposite manner, and the testing units comprise:

9. The fully automatic flexible circuit board tester according to claim 8, wherein the lifting subunit comprises:

the lifting motor is used for driving the test jig to move up and down;