Optical detection machine for circuit board

Abstract

The invention relates to the technical field of circuit board detection, in particular to a circuit board optical detection machine which comprises two symmetrically-arranged main body plates, transmission mechanisms are arranged on the inner side faces of the two main body plates, and bending detection mechanisms are arranged at the upper ends of the two main body plates. The two bending detection mechanisms comprise two fourth limiting grooves formed in the upper ends of the main body plates, the two main body plates are slidably connected with limiting blocks in the fourth limiting grooves correspondingly, and the upper ends of the two limiting blocks are fixedly connected with first electric telescopic rods correspondingly; the telescopic ends of the two first electric telescopic rods are fixedly connected with a first fixing body. And a sixth electric telescopic rod extends according to the radian of the circuit board, and meanwhile, two third electric telescopic rods extend, so that the flexible circuit board is bent to the radian during installation in a first limiting groove, detection is carried out according to the radian during installation of the flexible circuit board, and impurities such as bubbles in the circuit board during installation are accurately detected.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board detection, and particularly relates to an optical detector for circuit boards. Background Art

[0002] Optical detection of circuit boards generally refers to using optical principles and related equipment to detect circuit boards to discover possible defects on the circuit boards, such as short circuits, open circuits, missing components, offset, etc. Detecting circuit boards by X-rays is a commonly used detection technology at present. In the existing X-ray detection technology, generally, the circuit board is placed on a conveyor belt during detection, and the conveyor belt drives the circuit board to be detected below the detector. Before detection, the surface of the circuit board is cleaned manually or by a machine.

[0003] For flexible circuit boards, generally, the circuit board is installed in a certain arc shape during installation. However, the existing X-ray detectors cannot fix the flexible circuit board according to the installation arc during detection, resulting in some bubbles and other impurities in the circuit board not being detected under the drive of planar extrusion, reducing the quality of the flexible circuit board. The existing X-ray detection device cannot clean the surface of the circuit board during detection, and the existing X-ray detection device cannot adjust the clamping of circuit boards with different widths, resulting in low applicability. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawbacks existing in the background art and propose an optical detector for circuit boards.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: An optical detector for circuit boards includes two symmetrically placed main boards. A transmission mechanism is provided on the inner sides of the two main boards. A bending detection mechanism is provided at the upper ends of the two main boards. The two bending detection mechanisms include two fourth limiting grooves opened at the upper ends of the main boards. The two main boards are respectively slidably connected with limiting blocks in the fourth limiting grooves. The upper ends of the two limiting blocks are respectively fixedly connected with first electric telescopic rods. The telescopic ends of the two first electric telescopic rods are fixedly connected with a first fixing body. A first limiting groove is opened at the lower end of the first fixing body. A support mechanism is connected to the inner sides of the two main boards.

[0006] Preferably, second placement grooves are respectively formed in the symmetric side surfaces of the first fixing body. Third electric telescopic rods are respectively and fixedly connected in the second placement grooves of the first fixing body. The telescopic ends of the two third electric telescopic rods are respectively and fixedly connected with third motors. The transmission shaft ends of the two third motors are respectively and fixedly connected with U-shaped bodies. Fourth electric telescopic rods are respectively and fixedly connected between the upper and lower plates of the two U-shaped bodies. The telescopic ends of the four fourth electric telescopic rods are respectively and fixedly connected with pressing plates. Fourth motors are respectively and fixedly connected in the fourth limiting grooves of the main body plate. The transmission shaft ends of the two fourth motors are respectively and fixedly connected with second threaded rods. The side surfaces of the two second threaded rods are respectively arranged in threaded cooperation with the limiting blocks.

[0007] Preferably, a third limiting groove is formed in one side surface of the first fixing body. A second motor is fixedly connected in the third limiting groove of the first fixing body. The transmission shaft end of the second motor is fixedly connected with a first threaded rod. A plurality of second fixing bodies are connected to the side surface of the first threaded rod.

[0008] Preferably, first through holes are respectively formed through the side surfaces of a plurality of second fixing bodies. Fixing rings are respectively connected in the first through holes of the plurality of second fixing bodies. A plurality of second limiting grooves are respectively formed in the side surfaces of the plurality of fixing rings and are arranged at equal angles. Second electric telescopic rods are respectively and fixedly connected in the plurality of second limiting grooves. The telescopic ends of the plurality of second electric telescopic rods are respectively and fixedly connected with anti-slip plates.

[0009] Preferably, threaded grooves matched with the first threaded rod are formed through the side surfaces of the plurality of fixing rings. Sixth electric telescopic rods are respectively connected to the side surfaces of the plurality of second fixing bodies. A plurality of first placement grooves are formed in the side surface of the first fixing body and are arranged at equal angles. Reflectors are fixedly connected in the plurality of first placement grooves of the first fixing body.

[0010] Preferably, the supporting mechanism includes fixing plates fixedly arranged on the inner side surfaces of the two main body plates. A fifth limiting groove is formed at the upper end of the fixing plate. A fifth motor is fixedly connected in the fifth limiting groove of the fixing plate. The transmission shaft end of the fifth motor is fixedly connected with a third threaded rod. The side surface of the third threaded rod consists of two threads with opposite spiral directions. Two symmetrically arranged guiding bodies are arranged on the side surface of the third threaded rod in threaded cooperation.

[0011] Preferably, fifth electric telescopic rods are fixedly connected to the upper ends of the two guiding bodies respectively. Fixed shells are fixedly connected to the telescopic ends of the two fifth electric telescopic rods respectively. The upper ends of the two fixed shells are of an open structure. Partition plates are fixedly connected to the sides of the two fixed shells respectively. Air pumps are fixedly connected to the end faces of the two partition plates respectively. A plurality of air outlet holes are evenly distributed at equal angles at the lower ends of the two fixed shells respectively. Annular grooves are formed at the upper ends of the two fixed shells respectively. Flexible rings are fixedly connected in the two annular grooves respectively.

[0012] Preferably, the transmission mechanism includes two fixed rods fixedly connected to the inner side surface of the main body plate. Transmission rollers are rotatably connected to the sides of the two fixed rods. A conveyor belt is tightly connected to the sides of the two transmission rollers. A plurality of empty grooves are arranged at equal distances on the side surface of the conveyor belt. Anti-drop wheels are rotatably connected to the sides of the two transmission rollers respectively. A first motor is fixedly connected to the side surface of the main body plate. The transmission shaft end of the first motor is of a circular ring structure. The transmission shaft end of the first motor is fixedly connected to one of the transmission rollers. Support columns are symmetrically connected to the lower ends of the two main body plates.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The third threaded rod cooperates to drive the two guiding bodies to move to appropriate positions, so as to support circuit boards of different lengths. Then the fifth electric telescopic rod extends. The fifth electric telescopic rod drives the two fixed shells to move to the lower end surface of the circuit board. Then the air pump is started, so as to clamp and limit the circuit board through the pressure inside the flexible ring, avoiding extrusion of the side surface of the circuit board and improving the reliability of the device. 2. The sixth electric telescopic rod extends according to the radian of the circuit board, and a laser receiving plate is arranged at the telescopic end of the sixth electric telescopic rod. At the same time, the two third electric telescopic rods extend, so that the flexible circuit board bends to the radian at the time of installation in the first limiting groove. Then a plurality of reflectors are started, so as to detect according to the radian of the flexible circuit board at the time of installation, and thus accurately detect impurities such as air bubbles inside the circuit board at the time of installation, thereby improving the quality of the flexible circuit board. 3. The fifth motor rotates forward and backward continuously. The fifth motor drives the two guiding bodies to reciprocate through the third threaded rod. While moving, the two fixed shells can blow away dust and other impurities on the side surface of the circuit board, and a filter screen is arranged in the air outlet holes on the end face of the fixed shell, improving the detection efficiency of the flexible circuit board. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-section of the whole of the present invention Figure 1 ; Figure 3Partial cross-sectional structure of the present invention Figure 1 ; Figure 4 Partial cross-sectional structure of the present invention Figure 2 ; Figure 5 Partial cross-sectional structure of the present invention Figure 2 ; Figure 6 For the present invention Figure 2 A magnified image of point A; Figure 7 For the present invention Figure 2 The enlarged view of point B; Figure 8 For the present invention Figure 3 Enlarged view of point C; Figure 9 For the present invention Figure 4 The enlarged view of point D; Figure 10 For the present invention Figure 4 Enlarged view of point E.

[0015] 1. Main plate; 2. Transmission mechanism; 3. Bending detection mechanism; 4. Support mechanism; 11. Support column; 21. Conveyor belt; 22. Empty slot; 23. Fixed rod; 24. Transmission roller; 25. Anti-slip wheel; 26. First motor; 31. First electric telescopic rod; 32. First fixed body; 33. First limiting groove; 34. Second fixed body; 35. First through hole; 36. Fixed ring; 37. Second limiting groove; 38. Second electric telescopic rod; 39. Anti-slip plate; 310. Sixth electric telescopic rod; 311. Third limiting groove; 312. Second motor; 313. First threaded rod; 314. The first placement slot; 315, reflector; 316, second placement slot; 317, third electric telescopic rod; 318, third motor; 319, U-shaped body; 320, extrusion plate; 321, fourth electric telescopic rod; 322, limit block; 323, fourth motor; 324, second threaded rod; 325, fourth limit slot; 41, fixing plate; 42, fifth limit slot; 43, third threaded rod; 44, fifth motor; 45, guide body; 46, fifth electric telescopic rod; 47, fixing shell; 48, air outlet; 49, partition; 410, air pump; 411, annular groove; 412, flexible ring. DETAILED DESCRIPTION

[0016] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0017] See also Figures 1 - 10, an optical inspection machine for circuit boards, including two symmetrically placed main boards 1, and a transmission mechanism 2 is arranged on the inner side surfaces of the two main boards 1.

[0018] In this embodiment, the transmission mechanism 2 includes two fixed rods 23 fixedly connected to the inner side surfaces of the main boards 1. A transmission roller 24 is rotatably connected to the side surfaces of the two fixed rods 23. A conveyor belt 21 is tightly connected to the side surfaces of the two transmission rollers 24. A number of equally spaced empty slots 22 are formed in the side surface of the conveyor belt 21. Anti-off wheels 25 are respectively rotatably connected to the side surfaces of the two transmission rollers 24. A first motor 26 is fixedly connected to the side surface of the main board 1. The transmission shaft end of the first motor 26 is in a circular ring structure, and the transmission shaft end of the first motor 26 is fixedly connected to one transmission roller 24. Support columns 11 are symmetrically connected to the lower ends of the two main boards 1.

[0019] Specifically, the first motor 26 drives one transmission roller 24 to rotate, the transmission roller 24 drives the conveyor belt 21 to rotate, and then the long flexible circuit board is placed on the conveyor belt 21. The empty slots 22 on the end surface of the conveyor belt 21 are slightly smaller than the cross-section of the circuit board.

[0020] In this embodiment, bending detection mechanisms 3 are arranged at the upper ends of the two main boards 1. The two bending detection mechanisms 3 include two fourth limit slots 325 formed in the upper ends of the main boards 1. Limit blocks 322 are respectively slidably connected in the fourth limit slots 325 of the two main boards 1. First electric telescopic rods 31 are respectively fixedly connected to the upper ends of the two limit blocks 322. The telescopic end parts of the two first electric telescopic rods 31 are fixedly connected to a first fixing body 32. A first limit slot 33 is formed in the lower end of the first fixing body 32.

[0021] Second placement slots 316 are respectively formed in the symmetrical side surfaces of the first fixing body 32. Third electric telescopic rods 317 are respectively fixedly connected in the second placement slots 316 of the first fixing body 32. Third motors 318 are respectively fixedly connected to the telescopic end parts of the two third electric telescopic rods 317. U-shaped bodies 319 are respectively fixedly connected to the transmission shaft ends of the two third motors 318. Fourth electric telescopic rods 321 are respectively fixedly connected between the upper and lower plates of the two U-shaped bodies 319. Pressing plates 320 are respectively fixedly connected to the telescopic end parts of the four fourth electric telescopic rods 321. Fourth motors 323 are respectively fixedly connected in the fourth limit slots 325 of the main board 1. Second threaded rods 324 are respectively fixedly connected to the transmission shaft ends of the two fourth motors 323. The side surfaces of the two second threaded rods 324 are in threaded cooperation with the limit blocks 322 respectively.

[0022] On one side surface of the first fixing body 32, a third limiting groove 311 is provided. Inside the third limiting groove 311 of the first fixing body 32, a second motor 312 is fixedly connected. At the transmission shaft end of the second motor 312, a first threaded rod 313 is fixedly connected. On the side surface of the first threaded rod 313, a number of second fixing bodies 34 are connected.

[0023] On the side surfaces of a number of second fixing bodies 34, first through holes 35 are respectively penetrated. Inside the first through holes 35 of a number of the second fixing bodies 34, fixing rings 36 are connected. On the side surfaces of a number of the fixing rings 36, a number of second limiting grooves 37 distributed at equal angles are respectively provided. Inside a number of the second limiting grooves 37, second electric telescopic rods 38 are respectively fixedly connected. At the telescopic end parts of a number of the second electric telescopic rods 38, anti-slip plates 39 are respectively fixedly connected.

[0024] On the side surfaces of a number of the fixing rings 36, threaded grooves matching with the first threaded rod 313 are penetrated. On the side surfaces of a number of the second fixing bodies 34, sixth electric telescopic rods 310 are respectively connected. On the side surface of the first fixing body 32, a number of first placement grooves 314 arranged at equal angles are provided. Inside a number of the first placement grooves 314 of the first fixing body 32, reflectors 315 are fixedly connected.

[0025] Specifically, two third electric telescopic rods 317 drive the U-shaped body 319 to move towards the end of the circuit board. Then, the fourth electric telescopic rod 321 extends to drive the pressing plate 320 to press and fix the end of the circuit board. Then, two third motors 318 rotate 90°. The second motor 312 is started, and the second electric telescopic rod 38 extends. At this time, the second motor 312 cooperates to drive a number of second fixing bodies 34 to move to a predetermined position.

[0026] In this embodiment, on the inner side surfaces of the two main body plates 1, a support mechanism 4 is connected.

[0027] The support mechanism 4 includes fixing plates 41 fixedly arranged on the inner side surfaces of the two main body plates 1. At the upper end of the fixing plate 41, a fifth limiting groove 42 is provided. Inside the fifth limiting groove 42 of the fixing plate 41, a fifth motor 44 is fixedly connected. At the transmission shaft end of the fifth motor 44, a third threaded rod 43 is fixedly connected. The side surface of the third threaded rod 43 consists of two threads with opposite helix directions. On the side surface of the third threaded rod 43, two symmetrically arranged guiding bodies 45 are arranged through thread fit.

[0028] The upper ends of the two guiding bodies 45 are respectively fixedly connected with fifth electric telescopic rods 46. The telescopic ends of the two fifth electric telescopic rods 46 are respectively fixedly connected with fixed shells 47. The upper ends of the two fixed shells 47 are of an open structure. The sides of the two fixed shells 47 are respectively fixedly connected with partition plates 49. The end faces of the two partition plates 49 are respectively fixedly connected with air pumps 410. The lower ends of the two fixed shells 47 are respectively provided with a plurality of air outlet holes 48 distributed at equal angles. The upper ends of the two fixed shells 47 are respectively provided with annular grooves 411. Flexible rings 412 are respectively fixedly connected in the two annular grooves 411.

[0029] Specifically, the third threaded rod 43 cooperates to drive the two guiding bodies 45 to move to appropriate positions, so as to support circuit boards of different lengths. Then, the fifth electric telescopic rod 46 extends. The fifth electric telescopic rod 46 drives the two fixed shells 47 to move to the lower end face of the circuit board. Then, the air pump 410 is started, so as to clamp and limit the circuit board through the pressure inside the flexible ring 412, avoid squeezing the side of the circuit board, and improve the reliability of the device.

[0030] During use, start the first motor 26. The first motor 26 drives a driving roller 24 to rotate. The driving roller 24 drives the conveyor belt 21 to rotate. Then, place the long strip-shaped flexible circuit board on the conveyor belt 21. The empty slots 22 on the end face of the conveyor belt 21 are slightly smaller than the cross-section of the circuit board. When the empty slot 22 moves above the support mechanism 4, the first motor 26 stops rotating. At this time, the fifth motor 44 drives the third threaded rod 43 to rotate. The third threaded rod 43 cooperates to drive the two guiding bodies 45 to move to appropriate positions, so as to support circuit boards of different lengths. Then, the fifth electric telescopic rod 46 extends. The fifth electric telescopic rod 46 drives the two fixed shells 47 to move to the lower end face of the circuit board. Then, the air pump 410 is started, so as to clamp and limit the circuit board through the pressure inside the flexible ring 412, avoid squeezing the side of the circuit board, and improve the reliability of the device.

[0031] When the two fifth electric telescopic rods 46 drive the circuit board into the first limit slot 33 and parallel to the U-shaped body 319, extend the two third electric telescopic rods 317 at the same time. The two third electric telescopic rods 317 drive the U-shaped body 319 to move towards the end of the circuit board. Then, the fourth electric telescopic rod 321 extends to drive the pressing plate 320 to press and fix the end of the circuit board. After that, the two third motors 318 rotate 90°. The second motor 312 is started, and the second electric telescopic rod 38 extends. At this time, the second motor 312 cooperates to drive a plurality of second fixing bodies 34 to move to the predetermined positions. Then, the sixth electric telescopic rod 310 extends according to the radian of the circuit board, and a laser receiving plate is arranged at the telescopic end of the sixth electric telescopic rod 310. At the same time, the two third electric telescopic rods 317 extend, so that the flexible circuit board bends to the radian during installation in the first limit slot 33. Then, a plurality of reflectors 315 are started to detect according to the radian of the flexible circuit board during installation, so as to accurately detect impurities such as air bubbles inside the circuit board during installation, thereby improving the quality of the flexible circuit board.

[0032] Before detection, the two U-shaped bodies 319 fix the two ends of the circuit board. At this time, the two fifth electric telescopic rods 46 contract a certain distance, and at the same time, the two air pumps 410 blow air upward. The fifth motor 44 rotates forward and backward continuously. The fifth motor 44 drives the two guide bodies 45 to reciprocate through the third threaded rod 43. While moving, the two fixed shells 47 can blow away impurities such as dust on the side of the circuit board, and a filter screen is arranged in the air outlet holes 48 on the end faces of the fixed shells 47, improving the detection efficiency of the flexible circuit board.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical inspection machine for circuit boards, comprising two symmetrically placed main boards (1), characterized in that: On the inner sides of the two main plates (1), a transmission mechanism (2) is provided. At the upper ends of the two main plates (1), a bending detection mechanism (3) is provided. The two bending detection mechanisms (3) include two fourth limiting grooves (325) opened at the upper ends of the main plates (1). In the fourth limiting grooves (325) of the two main plates (1), limiting blocks (322) are slidably connected respectively. At the upper ends of the two limiting blocks (322), first electric telescopic rods (31) are fixedly connected respectively. At the telescopic ends of the two first electric telescopic rods (31), a first fixing body (32) is fixedly connected. At the lower end of the first fixing body (32), a first limiting groove (33) is opened. On the inner sides of the two main plates (1), a support mechanism (4) is connected.

2. An optical inspection machine for circuit boards according to claim 1, wherein: On the symmetrical sides of the first fixing body (32), second placement grooves (316) are respectively opened. In the second placement grooves (316) of the first fixing body (32), third electric telescopic rods (317) are fixedly connected respectively. At the telescopic ends of the two third electric telescopic rods (317), third motors (318) are fixedly connected respectively. At the transmission shaft ends of the two third motors (318), U-shaped bodies (319) are fixedly connected respectively. Between the upper and lower plates of the two U-shaped bodies (319), fourth electric telescopic rods (321) are fixedly connected respectively. At the telescopic ends of the four fourth electric telescopic rods (321), pressing plates (320) are fixedly connected respectively. In the fourth limiting grooves (325) of the main plates (1), fourth motors (323) are fixedly connected respectively. At the transmission shaft ends of the two fourth motors (323), second threaded rods (324) are fixedly connected respectively. On the sides of the two second threaded rods (324), the limiting blocks (322) are arranged in a threaded fit.

3. The optical inspection machine for circuit boards according to claim 1, wherein: On one side of the first fixing body (32), a third limiting groove (311) is opened. In the third limiting groove (311) of the first fixing body (32), a second motor (312) is fixedly connected. At the transmission shaft end of the second motor (312), a first threaded rod (313) is fixedly connected. On the side of the first threaded rod (313), a number of second fixing bodies (34) are connected.

4. The optical inspection machine for circuit boards according to claim 3, wherein: On the sides of a number of second fixing bodies (34), first through holes (35) are respectively penetrated. In the first through holes (35) of the number of second fixing bodies (34), fixing rings (36) are connected respectively. On the sides of the number of fixing rings (36), a number of second limiting grooves (37) distributed at equal angles are respectively opened. In the number of second limiting grooves (37), second electric telescopic rods (38) are fixedly connected respectively. At the telescopic ends of the number of second electric telescopic rods (38), anti-slip plates (39) are fixedly connected respectively.

5. The optical inspection machine for circuit boards according to claim 4, wherein: The side surfaces of a plurality of the fixing rings (36) are provided with threaded grooves cooperating with the first threaded rod (313); the side surfaces of a plurality of the second fixing bodies (34) are respectively connected to the sixth electric telescopic rod (310); the side surfaces of the first fixing body (32) are provided with a plurality of first placement grooves (314) arranged at equal angles; the first fixing body (32) is fixedly connected to a reflector (315) in the plurality of first placement grooves (314).

6. The optical inspection machine for circuit boards according to claim 1, wherein: The support mechanism (4) comprises a fixing plate (41) fixedly arranged on the inner side surfaces of the two main body plates (1); a fifth limiting groove (42) is formed at the upper end of the fixing plate (41); a fifth motor (44) is fixedly connected to the fixing plate (41) in the fifth limiting groove (42); a third threaded rod (43) is fixedly connected to the transmission shaft end of the fifth motor (44); a side surface of the third threaded rod (43) is composed of two sections of threads with opposite rotation directions; and two symmetrically arranged guide bodies (45) are arranged on the side surface of the third threaded rod (43) through threaded matching.

7. An optical inspection machine for circuit boards according to claim 6, characterized in that: The upper ends of the two guide bodies (45) are respectively fixedly connected to fifth electric telescopic rods (46), the telescopic ends of the two fifth electric telescopic rods (46) are respectively fixedly connected to fixed shells (47), the upper ends of the two fixed shells (47) are open structures, the sides of the two fixed shells (47) are respectively fixedly connected to partitions (49), the end surfaces of the two partitions (49) are respectively fixedly connected to air pumps (410), the lower ends of the two fixed shells (47) are respectively provided with a plurality of air outlet holes (48) distributed at equal angles, the upper ends of the two fixed shells (47) are respectively provided with annular grooves (411), and flexible rings (412) are respectively fixedly connected in the two annular grooves (411).

8. The optical inspection machine for circuit boards according to claim 1, wherein: The transmission mechanism (2) comprises two fixing rods (23) fixedly connected to the inner side surface of the main body plate (1); the sides of the two fixing rods (23) are rotatably connected to transmission rollers (24); the sides of the two transmission rollers (24) are tightly connected to the conveyor belt (21); the side surface of the conveyor belt (21) is provided with a plurality of empty grooves (22) arranged at equal distances; the sides of the two transmission rollers (24) are respectively rotatably connected to anti-slip wheels (25); the side surface of the main body plate (1) is fixedly connected to a first motor (26); the transmission shaft end of the first motor (26) is a circular ring structure; the transmission shaft end of the first motor (26) is fixedly connected to a transmission roller (24); and the lower ends of the two main body plates (1) are symmetrically connected to support columns (11).

Images