A circuit board visual inspection device for automatically retracting and placing boards

Abstract

The present invention discloses a circuit board visual inspection device for automatic retractable boards, comprising a positioning and placement unit, which comprises a turning cylinder, a plurality of transverse grooves are opened on the curved surface side of the turning cylinder, and the plurality of transverse grooves are distributed in a circular array, a clamping arm is slidably penetrated inside the transverse groove, and two clamping arms are symmetrically arranged inside one of the transverse grooves, a plurality of sliding rods are fixedly connected inside the turning cylinder, and the two ends of the sliding rods pass through two adjacent clamping arms respectively, and the sliding rods are slidably connected to the clamping arms. The circuit board visual inspection device for automatic retractable boards of the present invention can accurately grasp and place circuit boards through the design of the positioning and placement unit, ensure the high consistency of the position of the circuit boards during inspection, effectively reduce the inspection error caused by the placement position deviation, improve the accuracy and reliability of the visual inspection result, and reduce the misjudgment rate. Automatic unloading is performed through the cooperation of the placement plate, the roller and the contact plate, thereby realizing the function of automatic retractable boards.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board visual inspection, in particular to a circuit board visual inspection device capable of automatically retracting and placing a circuit board. Background Art

[0002] In the production and manufacturing process of circuit boards, visual inspection technology plays an extremely critical role in ensuring the quality of circuit boards. Traditional circuit board visual inspection mainly relies on manual placement of circuit boards on the inspection platform, and then the industrial camera at a fixed position performs image acquisition and analysis. This method can complete the inspection task to a certain extent, but it has many disadvantages.

[0003] First, it is difficult to ensure high accuracy and consistency in the placement of circuit boards manually, which can easily lead to deviations in the images taken by industrial cameras, thus affecting the accuracy and reliability of the test results. Defective circuit boards may be misjudged as qualified products and flow into subsequent processes, or qualified products may be misjudged as defective products, resulting in unnecessary waste. Secondly, manual operation is inefficient, especially in large-scale production environments. Frequent manual loading and unloading operations greatly limit the overall inspection speed, unable to meet the growing production needs, and increase production costs and production cycles. Summary of the invention

[0004] In order to solve the deficiencies mentioned in the above-mentioned background technology, the purpose of the present invention is to provide a circuit board visual inspection device with automatic retractable board. Through the design of the positioning and placement unit, the circuit board can be accurately grasped and placed, ensuring the high consistency of the position of the circuit board during inspection, effectively reducing the detection error caused by the placement position deviation, improving the accuracy and reliability of the visual inspection results, and reducing the misjudgment rate. Through the cooperation of the placement plate, roller and contact plate, automatic unloading is carried out to realize the function of automatic retractable board.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A circuit board visual inspection device for automatically retracting and placing a circuit board, comprising:

[0007] A positioning and placing unit, comprising a flip cylinder, a plurality of transverse grooves are provided on the curved surface side of the flip cylinder, the plurality of transverse grooves are distributed in a circumferential array, a clamping arm is slidably penetrated inside the transverse groove, two clamping arms are symmetrically arranged inside one transverse groove, a plurality of sliding rods are fixedly connected inside the flip cylinder, the two ends of the sliding rods respectively pass through two adjacent clamping arms, the sliding rods are slidably connected to the clamping arms, a first spring is sleeved on the sliding rod, and the two ends of the first spring are respectively fixedly connected to the two adjacent clamping arms;

[0008] The transfer unit comprises a turntable and a first mounting frame, wherein the first mounting frame is rotatably connected to a first rotating shaft, the turntable is fixedly mounted on the first rotating shaft, an intermittent rotating assembly is arranged on the first rotating shaft, a plurality of detection areas are arranged on the turntable, and the plurality of detection areas are distributed in a circumferential array, guide blocks are symmetrically arranged on the turntable and located on both radial sides of the detection areas, and through grooves are symmetrically arranged on the turntable and located on both circumferential sides of the detection areas;

[0009] The visual inspection unit comprises an industrial camera, wherein the industrial camera is located on a turntable and the shooting direction of the industrial camera is toward an inspection area on the turntable.

[0010] Further preferably, the positioning and placement unit also includes a second mounting frame and a limiting sleeve, the limiting sleeve is fixedly mounted on the second mounting frame, the limiting sleeve is sleeved on the flip cylinder, the limiting sleeve is located between two adjacent clamping arms, a second rotating shaft is fixedly connected to the limiting sleeve, the second rotating shaft is rotatably mounted on the second mounting frame, a transmission assembly is transmission-connected between the second rotating shaft and the first rotating shaft, a recessed area is provided on the side of the limiting sleeve, the end of the recessed area close to the turntable is an inclined surface, and the end of the recessed area away from the turntable is a right-angled surface.

[0011] Further preferably, a bracket is fixedly connected to the second mounting frame, a guide channel is fixedly connected to the bracket, and an L-shaped support plate is fixedly connected to a side of the guide channel close to the turning cylinder.

[0012] Further preferably, the height of the inner cavity of the guide channel is greater than the height of the circuit board to be detected, and the height of the inner cavity of the guide channel is less than the sum of the heights of two circuit boards to be detected.

[0013] Further preferably, the lateral width of the supporting area of ​​the L-shaped support plate is greater than the lateral width of the circuit board to be detected, and less than the sum of the lateral widths of the two circuits to be detected.

[0014] Further preferably, the intermittent rotation component includes a linkage disk, a stabilizing disk and a driving disk, the linkage disk is fixedly mounted on the first rotating shaft, the stabilizing disk is fixedly installed on the driving disk, the linkage disk is provided with a plurality of first fan-shaped grooves, the stabilizing disk is provided with a second fan-shaped groove, the driving disk is fixedly connected with a toggle shaft, the linkage disk is provided with a toggle groove, the toggle groove is located between two adjacent first fan-shaped grooves, a rotating motor is fixedly mounted on the first mounting frame, and the output end of the rotating motor is transmission-connected to the driving disk.

[0015] Further preferably, the stabilizing disk has the same radius as the first fan-shaped groove, the curved surface of the stabilizing disk fits the first fan-shaped groove, the radius of the second fan-shaped groove is the same as the radius of the linkage disk, and four first fan-shaped grooves are provided and distributed in a circular array.

[0016] Further preferably, the detection area is provided with a discharge plate, one side of the bottom of the discharge plate is fixedly connected to a steering shaft, the steering shaft is movably mounted on a turntable, a roller is sleeved on the steering shaft, the first mounting frame is fixedly connected to a first electric telescopic rod and a second electric telescopic rod, the angle between the first electric telescopic rod and the second electric telescopic rod is 90°, the output ends of the first electric telescopic rod and the second electric telescopic rod are fixedly connected to a contact plate, the contact plate is located on the moving path of the roller, the roller is fixedly connected to an angle limiting plate, the end face of the angle limiting plate is tangent to the curved surface of the roller, and a discharge channel is opened on the turntable and passes through the detection area in a counterclockwise direction.

[0017] Further preferably, the visual inspection unit also includes a data processing system and a lighting lamp, the data processing system is signal-connected to the industrial camera, the first electric telescopic rod and the second electric telescopic rod respectively, and the lighting lamp is fixedly connected to the first mounting bracket.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention can accurately grab and place the circuit board through the design of the positioning and placement unit, ensure the high consistency of the position of the circuit board during detection, effectively reduce the detection error caused by the placement position deviation, improve the accuracy and reliability of the visual inspection results, and reduce the misjudgment rate. Through the cooperation of the placement plate, roller and contact plate, automatic unloading is carried out to realize the function of automatic board collection and release;

[0020] 2. The combination of the automatic retractable plate and the transfer unit of the present invention realizes the automated assembly line operation of the circuit board detection process. The intermittent rotation component enables the turntable to carry out various detection processes in an orderly manner without frequent manual intervention in loading and unloading, which greatly shortens the detection cycle and increases the number of detections per unit time, meeting the requirements of large-scale production for detection efficiency. The automated detection process reduces the dependence on manual operation and reduces labor costs. At the same time, it avoids possible misoperations such as fatigue and negligence during manual operation, further improving product detection quality and production stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a cross-sectional view of the turning cylinder structure in the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the turning cylinder in the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the limiting sleeve in the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the transfer unit in the present invention;

[0027] Figure 6 It is a structural schematic diagram of the transfer unit in the present invention from another perspective;

[0028] Figure 7 It is a schematic diagram of the structure of the intermittent rotating assembly in the present invention;

[0029] Figure 8 It is a schematic diagram of the visual detection unit in the present invention.

[0030] In the figure:

[0031] 100, positioning and placing unit; 101, turning cylinder; 102, horizontal groove; 103, clamping arm; 104, sliding rod; 105, first spring; 106, second mounting frame; 107, limiting sleeve; 108, second rotating shaft; 109, transmission assembly; 110, recessed area; 111, inclined surface; 112, right-angle surface; 113, bracket; 114, guide channel; 115, L-shaped support plate; 200, transfer unit; 201, turntable; 202, first mounting frame; 203, first rotating shaft; 204, detection area; 205, guide block; 2 06, through slot; 207, linkage disk; 208, stabilizing disk; 209, active disk; 210, first fan-shaped slot; 211, second fan-shaped slot; 212, toggle shaft; 213, toggle slot; 214, rotating motor; 215, unloading plate; 216, steering shaft; 217, roller; 218, first electric telescopic rod; 219, second electric telescopic rod; 220, contact plate; 221, angle limiting plate; 222, unloading channel; 300, visual inspection unit; 301, industrial camera; 302, data processing system; 303, lighting lamp. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] like Figure 1-8 As shown, a circuit board visual inspection device for automatically collecting and placing boards includes: a positioning and placing unit 100, a transfer unit 200, and a visual inspection unit 300.

[0035] The positioning and placement unit 100 includes a flip cylinder 101, and a plurality of transverse grooves 102 are opened on the curved side of the flip cylinder 101, and the plurality of transverse grooves 102 are distributed in a circular array. A clamping arm 103 slides through the interior of the transverse groove 102, and two clamping arms 103 are symmetrically arranged inside one transverse groove 102. A plurality of sliding rods 104 are fixedly connected inside the flip cylinder 101, and the two ends of the sliding rod 104 pass through two adjacent clamping arms 103 respectively. The sliding rod 104 is slidably connected to the clamping arm 103, and a first spring 105 is sleeved on the sliding rod 104, and the two ends of the first spring 105 are fixedly connected to the two adjacent clamping arms 103 respectively.

[0036] like Figure 1-4 As shown, the positioning and placement unit 100 also includes a second mounting frame 106 and a limiting sleeve 107, the limiting sleeve 107 is fixedly mounted on the second mounting frame 106, the limiting sleeve 107 is sleeved on the flip cylinder 101, the limiting sleeve 107 is located between two adjacent clamping arms 103, a second rotating shaft 108 is fixedly connected to the limiting sleeve 107, the second rotating shaft 108 is rotatably mounted on the second mounting frame 106, a transmission assembly 109 is transmission-connected between the second rotating shaft 108 and the first rotating shaft 203, a recessed area 110 is provided on the side of the limiting sleeve 107, the end of the recessed area 110 close to the turntable 201 is an inclined surface 111, and the end of the recessed area 110 away from the turntable 201 is a right-angle surface 112.

[0037] like Figure 1-4 As shown, in this embodiment, the structure of the transmission assembly 109 has a certain flexibility. It can be composed of two pulley sets and a bevel gear set to achieve the transmission requirements between the first rotating shaft 203 and the second rotating shaft 108; of course, multiple sets of transmission shafts and universal couplings can also be used to achieve transmission. However, no matter which method is used, the core requirement is that it must ensure that the first rotating shaft 203 and the second rotating shaft 108 can rotate at the same time, and the rotation speeds of the two are consistent.

[0038] The second mounting frame 106 is fixedly connected with a bracket 113, and the bracket 113 is fixedly connected with a guide channel 114. The guide channel 114 is fixedly connected with an L-shaped support plate 115 on one side close to the flip cylinder 101. The height of the inner cavity of the guide channel 114 is greater than the height of the circuit board to be detected, and the height of the inner cavity of the guide channel 114 is less than the sum of the heights of the two circuit boards to be detected. The lateral width of the support area of ​​the L-shaped support plate 115 is greater than the lateral width of the circuit board to be detected, and less than the sum of the lateral widths of the two circuits to be detected. The circuit board to be detected is transported to the end by the feeding conveyor belt, and then enters the guide channel 114. Due to the size limitations of the guide channel 114 and the L-shaped support plate, the circuit boards can only enter one by one and are in a preliminary positioning state.

[0039] like Figure 4-7 As shown, the transfer unit 200 includes a turntable 201 and a first mounting frame 202, the first mounting frame 202 is rotatably connected to a first rotating shaft 203, the turntable 201 is fixedly mounted on the first rotating shaft 203, the first rotating shaft 203 is provided with an intermittent rotating component, the turntable 201 is provided with a plurality of detection areas 204, and the plurality of detection areas 204 are distributed in a circular array, guide blocks 205 are symmetrically arranged on the turntable 201 and located on both radial sides of the detection areas 204, and through grooves 206 are symmetrically arranged on the turntable 201 and located on both circumferential sides of the detection areas 204.

[0040] like Figure 4-7 As shown, the intermittent rotation component includes a linkage disk 207, a stabilizing disk 208 and an active disk 209, the linkage disk 207 is fixedly mounted on the first rotating shaft 203, the stabilizing disk 208 is fixedly installed on the active disk 209, the linkage disk 207 is provided with a plurality of first fan-shaped grooves 210, the stabilizing disk 208 is provided with a second fan-shaped groove 211, the active disk 209 is fixedly connected with a toggle shaft 212, the linkage disk 207 is provided with a toggle groove 213, the toggle groove 213 is located between two adjacent first fan-shaped grooves 210, and a rotating motor 214 is fixedly installed on the first mounting frame 202, and the output end of the rotating motor 214 is transmission-connected to the active disk 209. The rotating motor 214 drives the active disk 209 to rotate, and through the cooperation between the toggle shaft 212 and the toggle slot 213 of the linkage disk 207 and the stabilizing disk 208 and the first fan-shaped slot 210, the first rotating shaft 203 rotates intermittently, thereby driving the rotating disk 201 to rotate intermittently.

[0041] like Figure 4-7As shown, the stabilizing disk 208 has the same radius as the first fan-shaped groove 210, the curved surface of the stabilizing disk 208 fits the first fan-shaped groove 210, the radius of the second fan-shaped groove 211 is the same as the radius of the linkage disk 207, and there are four first fan-shaped grooves 210 distributed in a circular array.

[0042] like Figure 4-7 As shown, the detection area 204 is provided with a discharge plate 215, and a steering shaft 216 is fixedly connected to one side of the bottom of the discharge plate 215, and the steering shaft 216 is movably mounted on the turntable 201. A roller 217 is sleeved on the steering shaft 216, and a first electric telescopic rod 218 and a second electric telescopic rod 219 are fixedly connected to the first mounting frame 202. The angle between the first electric telescopic rod 218 and the second electric telescopic rod 219 is 90°, and the output ends of the first electric telescopic rod 218 and the second electric telescopic rod 219 are fixedly connected with a contact plate 220, and the contact plate 220 is located on the moving path of the roller 217, and an angle limiting plate 221 is fixedly connected to the roller 217, and the end face of the angle limiting plate 221 is tangent to the curved surface of the roller 217, and a discharge channel 222 is opened on the turntable 201 and is located in the detection area 204 in a counterclockwise direction.

[0043] like Figure 8 As shown, the visual inspection unit 300 includes an industrial camera 301 , which is located on the turntable 201 , and the shooting direction of the industrial camera 301 is toward the inspection area 204 on the turntable 201 .

[0044] The visual inspection unit 300 also includes a data processing system 302 and a lighting lamp 303 . The data processing system 302 is respectively connected to the industrial camera 301 , the first electric telescopic rod 218 , and the second electric telescopic rod 219 by signals. The lighting lamp 303 is fixedly connected to the first mounting frame 202 .

[0045] Installation process and initial location:

[0046] First, build the first mounting frame 202 and the second mounting frame 106 to ensure that their structures are stable. Install the first rotating shaft 203 on the first mounting frame 202, and fix the rotating disk 201 on the first rotating shaft 203. Install the rotating motor 214 on the first mounting frame 202, and connect its output end to the driving disk 209 in a transmission manner, and then install the linkage disk 207 and the stabilizing disk 208 in sequence, so that each component is precisely matched to ensure that the intermittent rotating assembly can operate normally. A conveyor belt is installed under each of the two contact plates 220 to receive the fallen circuit boards and transfer them to the next process.

[0047] Install the limiting sleeve 107 on the second mounting frame 106 so that it is sleeved on the turning cylinder 101. Assemble the clamping arm 103 and the sliding rod 104 in the turning cylinder 101, install the first spring 105, so that the clamping arm 103 can slide flexibly in the transverse groove 102 and has a clamping force, and realize the rotation connection with the second mounting frame 106 through the second rotating shaft 108. Install the guide channel 114 and the L-shaped support plate on the bracket 113, and adjust their positions and angles according to the design requirements. And ensure that the guide channel 114 is located at the end of the feeding conveyor belt.

[0048] Install the relevant components of the detection area 204 on the turntable 201, including the unloading plate 215, the steering shaft 216, the roller 217, etc., and install the contact plate 220 at the corresponding position of the first mounting frame 202. Install the industrial camera 301 and the lighting lamp 303 at a suitable position so that they can effectively shoot and illuminate the detection area 204. Finally, connect the data processing system 302 with the industrial camera 301 and debug the signal transmission.

[0049] Working principle:

[0050] The circuit board to be inspected is transported to the end by the feeding conveyor belt and then enters the guide channel 114. Due to the size limitation of the guide channel 114 and the L-shaped pallet, the circuit boards can only enter one by one and are in a preliminary positioning state. The rotating motor 214 is started to drive the active disk 209 to rotate. Through the cooperation of the toggle shaft 212 and the toggle groove 213 of the linkage disk 207 and the stabilizing disk 208 and the first fan-shaped groove 210, the first rotating shaft 203 rotates intermittently, thereby driving the turntable 201 to rotate intermittently. A transmission assembly 109 is connected between the first rotating shaft 203 and the second rotating shaft 108, so that the second rotating shaft 108 rotates intermittently and the flip cylinder 101 rotates. When the clamping arm 103 is aligned with the guide channel 114 and the clamping arm 103 enters the right-angle surface 112 area of ​​the recessed area 110 of the limiting sleeve 107, the clamping arm 103 contracts inwardly under the action of the first spring 105 to clamp the circuit board. Then the flip cylinder 101 continues to rotate. When the clamping arm 103 moves to the top of the detection area 204, due to the action of the inclined surface 111 of the recessed area 110 of the limiting sleeve 107, the clamping arm 103 slides outward on the sliding rod 104, the first spring 105 is stretched, and the clamping arm 103 releases the clamping of the circuit board. At this time, the circuit board slides onto the placement plate of the detection area 204 and is guided and positioned by the guide block 205.

[0051] Then the turntable 201 continues to rotate, and when the detection area 204 moves to the working range of the industrial camera 301, the industrial camera 301 collects images of the circuit boards in the detection area 204 with the assistance of the lighting 303, and the data processing system 302 analyzes and processes the images in real time to determine whether the circuit boards are qualified.

[0052] When the inspection is completed, the turntable 201 continues to rotate. If the circuit board is qualified, the output end of the first electric telescopic rod 218 extends, so that the contact plate 220 moves to the moving path of the roller 217. Under the action of the contact plate 220, the roller 217 at the bottom of the discharge plate 215 drives the discharge plate 215 to rotate a certain angle around the steering shaft 216. The existence of the angle limiting plate 221 limits the rotation angle of the discharge plate 215, so that the circuit board slides out to the qualified product collection area through the discharge channel 222; if it is unqualified, the output end of the first electric telescopic rod 218 does not move, and the output end of the second electric telescopic rod 219 extends, so that the contact plate 220 moves to the moving path of the roller 217. When the roller 217 contacts the second electric telescopic rod 219, the circuit board slides out to the unqualified product collection area through the discharge channel 222.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] 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 to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A circuit board visual inspection device for automatically retracting and placing a circuit board, characterized in that: include: A positioning and placing unit (100) comprises a turning cylinder (101), a plurality of transverse grooves (102) are provided on the curved surface side of the turning cylinder (101), the plurality of transverse grooves (102) are distributed in a circular array, a clamping arm (103) is slidably penetrated inside the transverse groove (102), two clamping arms (103) are symmetrically arranged inside one transverse groove (102), a plurality of sliding rods (104) are fixedly connected inside the turning cylinder (101), two ends of the sliding rod (104) respectively pass through two adjacent clamping arms (103), the sliding rod (104) and the clamping arm (103) are slidably connected, a first spring (105) is sleeved on the sliding rod (104), and the two ends of the first spring (105) are respectively fixedly connected to the two adjacent clamping arms (103); A transfer unit (200), comprising a turntable (201) and a first mounting frame (202), wherein the first mounting frame (202) is rotatably connected to a first rotating shaft (203), the turntable (201) is fixedly mounted on the first rotating shaft (203), an intermittent rotating assembly is arranged on the first rotating shaft (203), a plurality of detection areas (204) are arranged on the turntable (201), and the plurality of detection areas (204) are distributed in a circular array, guide blocks (205) are symmetrically arranged on the turntable (201) and located on both radial sides of the detection areas (204), and through grooves (206) are symmetrically arranged on the turntable (201) and located on both circumferential sides of the detection areas (204); A visual inspection unit (300) comprises an industrial camera (301), wherein the industrial camera (301) is located on a turntable (201), and the shooting direction of the industrial camera (301) is toward an inspection area (204) on the turntable (201).

2. The circuit board visual inspection device for automatically retracting and placing the board according to claim 1 is characterized in that: The positioning and placing unit (100) further comprises a second mounting frame (106) and a limiting sleeve (107), wherein the limiting sleeve (107) is fixedly mounted on the second mounting frame (106), the limiting sleeve (107) is sleeved on the flip cylinder (101), the limiting sleeve (107) is located between two adjacent clamping arms (103), and the limiting sleeve (107) is fixedly connected to a second rotating shaft (108), wherein the second rotating shaft (108) is rotatably mounted on a second mounting frame (106); a transmission assembly (109) is transmission-connected between the second rotating shaft (108) and the first rotating shaft (203); a recessed area (110) is provided on the side of the limiting sleeve (107); an end of the recessed area (110) close to the turntable (201) is an inclined surface (111), and an end of the recessed area (110) away from the turntable (201) is a right-angled surface (112).

3. The circuit board visual inspection equipment for automatically retracting and placing boards according to claim 2 is characterized in that: The second mounting frame (106) is fixedly connected to a bracket (113), the bracket (113) is fixedly connected to a guide channel (114), and the guide channel (114) is fixedly connected to an L-shaped support plate (115) on a side close to the turning cylinder (101).

4. The circuit board visual inspection device for automatically retracting and placing a board according to claim 3 is characterized in that: The height of the inner cavity of the guide channel (114) is greater than the height of the circuit board to be detected, and the height of the inner cavity of the guide channel (114) is less than the sum of the heights of the two circuit boards to be detected.

5. The circuit board visual inspection device for automatically retracting and placing a board according to claim 3 is characterized in that: The lateral width of the support area of ​​the L-shaped support plate (115) is greater than the lateral width of the circuit board to be detected, and less than the sum of the lateral widths of the two circuits to be detected.

6. The circuit board visual inspection equipment for automatically placing and retracting boards according to claim 1 is characterized in that: The intermittent rotation component comprises a linkage disk (207), a stabilizing disk (208) and a driving disk (209); the linkage disk (207) is fixedly sleeved on the first rotating shaft (203); the stabilizing disk (208) is fixedly mounted on the driving disk (209); a plurality of first fan-shaped grooves (210) are provided on the linkage disk (207); a second fan-shaped groove (211) is provided on the stabilizing disk (208); a toggle shaft (212) is fixedly connected to the driving disk (209); a toggle groove (213) is provided on the linkage disk (207); the toggle groove (213) is located between two adjacent first fan-shaped grooves (210); a rotating motor (214) is fixedly mounted on the first mounting frame (202); and an output end of the rotating motor (214) is drivingly connected to the driving disk (209).

7. The circuit board visual inspection device for automatically retracting and placing a board according to claim 6 is characterized in that: The stabilizing disk (208) has the same radius as the first fan-shaped groove (210), the curved surface of the stabilizing disk (208) fits the first fan-shaped groove (210), the radius of the second fan-shaped groove (211) is the same as the radius of the linkage disk (207), and four first fan-shaped grooves (210) are provided and distributed in a circular array.

8. The circuit board visual inspection device for automatically placing and retracting a board according to claim 7 is characterized in that: The detection area (204) is provided with a material discharge plate (215), one side of the bottom of the material discharge plate (215) is fixedly connected to a steering shaft (216), the steering shaft (216) is movably mounted on the turntable (201), a roller (217) is sleeved on the steering shaft (216), the first mounting frame (202) is fixedly connected to a first electric telescopic rod (218) and a second electric telescopic rod (219), the angle between the first electric telescopic rod (218) and the second electric telescopic rod (219) is The angle of the first electric telescopic rod (218) and the second electric telescopic rod (219) are fixedly connected to a contact plate (220) at their output ends, and the contact plate (220) is located on the moving path of the roller (217). The roller (217) is fixedly connected to an angle limiting plate (221), and the end surface of the angle limiting plate (221) is tangent to the curved surface of the roller (217). A material discharge channel (222) is provided on the turntable (201) and is located in the detection area (204) and penetrates in a counterclockwise direction.

9. The circuit board visual inspection device for automatically retracting and placing a board according to claim 8, characterized in that: The visual inspection unit (300) further comprises a data processing system (302) and an illumination lamp (303); the data processing system (302) is respectively connected to the industrial camera (301), the first electric telescopic rod (218) and the second electric telescopic rod (219) by signals; and the illumination lamp (303) is fixedly connected to the first mounting frame (202).

Images