Circuit board quality detection device

Abstract

The invention provides a circuit board quality detection device, and relates to the technical field of circuit board detection, the circuit board quality detection device comprises a feeding frame, a workbench and a detection mechanism, the workbench is provided with a feeding groove, the feeding frame is arranged in the feeding groove, a frame is placed on the feeding frame, and the frame is used for limiting the edge of a circuit board body; a pushing mechanism is arranged above the portion, at one end of the feeding frame, of the workbench, the frame located at the uppermost end of the feeding frame is flush with the pushing mechanism, a first conveying belt and a second conveying belt are sequentially arranged above the portion, at the output end of the feeding frame, of the workbench, and the first conveying belt and the second conveying belt are of the same structure and are engaged with the two sides of the lower portions of the frames correspondingly. An assembling groove is formed above the workbench, the lower portion in the assembling groove is connected with the lower portion of the second conveying belt in an assembling mode through a first air cylinder, and a fixing frame is arranged on the workbench above the assembling groove. Through cooperation of the limiting clamps, the frame and the sliding rails, the circuit board can be conveniently overturned to be erected during detection, and the detection mechanism can conveniently detect the two faces of the circuit board at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board detection, and in particular to a circuit board quality detection device. Background Art

[0002] A circuit board can be called a printed circuit board or a printed circuit board. The quality of the circuit board after production and processing is related to whether the circuit board can operate normally after the SMT processing. If the circuit board cannot operate normally after the SMT processing due to the quality of the circuit board, the gain will outweigh the loss. Therefore, after the production of the circuit board, it is necessary to detect whether the pads are conductive.

[0003] For example, "CN115542135B" is a circuit board quality inspection device, which relates to the field of circuit board inspection technology, including a lifting assembly, the lifting assembly including a storage box, a top plate slidably installed in the storage box, a lifting rack fixedly installed on the top plate, the lifting rack slidably installed on the bottom plate, an annular slide rail is provided on the bottom plate, a gear on one side of the lifting rack is meshed with a driving gear, and a driving rack is provided on the side of the driving gear. The inspection assembly of the present invention can inspect double-sided circuit boards, and can be completed without flipping the circuit boards, thereby improving the inspection speed of the circuit boards; by setting a storage box that can store multiple circuit boards, and without manual placement, they can be inspected in sequence, thereby reducing the number of manual operation steps; by setting a lifting assembly, when the circuit boards in the storage box are inspected, the initial position can be automatically restored, so that the operator only needs to add circuit boards directly to the storage box after the circuit boards are inspected.

[0004] However, in the prior art, generally only one side of a circuit board needs to be inspected, while some circuit boards with components on both sides need to be inspected on both sides, such as mixed circuit boards. Since there are many components on both sides of the circuit board, the circuit board is usually placed flat on a pallet, and after one side is inspected, the circuit board is turned over and placed flat on the pallet, and then the other side is inspected, which reduces the inspection efficiency to a certain extent. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that for circuit boards that need to be inspected on both sides, the circuit boards are usually placed flat on a pallet, and after one side is inspected, the circuit boards are turned over and placed flat on the pallet, and then the other side is inspected, which reduces the inspection efficiency to a certain extent.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a circuit board quality detection device, comprising a loading rack, a workbench and a detection mechanism, the workbench is provided with a loading trough, the loading rack is arranged in the loading trough, a frame is placed on the loading rack, the frame is used to limit the edge of the circuit board body, a pushing mechanism is provided above the workbench at one end of the loading rack, the frame located at the uppermost end of the loading rack is flush with the pushing mechanism, a first conveyor belt and a second conveyor belt are sequentially provided above the workbench at the output end of the loading rack, the first conveyor belt and the second conveyor belt have the same structure and are respectively meshed with the two sides below the frame, an assembly groove is provided above the workbench, the lower part of the assembly groove is assembled and connected with the lower part of the second conveyor belt through a first cylinder, a fixed frame is provided on the workbench above the assembly groove, the detection mechanism is arranged on the fixed frame, slide rails are symmetrically provided on both sides of the assembly groove, and a limit clamp is provided in the slide rail through a slider, and two limit clamps are used to clamp and limit the two sides of the frame, a rack is provided on one side of the upper inner wall of the slide rail, and a gear meshed with the rack is provided on the limit clamp.

[0007] As a preferred embodiment, tooth rows are symmetrically provided on both sides of the outer walls of the first conveyor belt and the second conveyor belt, and tooth grooves meshing with the tooth rows are symmetrically provided on both sides below the frame. The stability of the first conveyor belt and the second conveyor belt when transporting the frame is ensured by the engagement and setting of the tooth rows and the tooth grooves.

[0008] As a preferred embodiment, an upper frame and a lower frame are respectively provided above and below the inner wall of the frame, the lower frame is arranged below the inner wall of the frame, the upper frame is slidably arranged above the inner wall of the frame, a card block is provided above the lower frame, and a card hole is provided on the upper frame to be engaged with the card block, the circuit board body is placed between the upper frame and the lower frame, and the cooperation between the upper frame and the lower frame is used to assemble the circuit board body in the frame and stably set it.

[0009] As a preferred embodiment, the loading rack includes a frame body and a vertical conveyor belt. The vertical conveyor belts are provided with two and are symmetrically arranged. The outer walls of the vertical conveyor belts are provided with pallets. The two pallets are located on the same horizontal plane on the opposite sides of the two vertical conveyor belts below the two sides of the frame. Through the synchronous rotation of the opposing conveyor belts, the frame can be driven to move upward smoothly to achieve the effect of uniform loading.

[0010] As a preferred embodiment, side grooves are symmetrically provided on both sides below the frame, side strips are provided above the support plate and are slidably engaged with the side grooves, a plurality of plug-in blocks are slidably provided at intervals below the side grooves, and a plurality of slots are provided above the support plate and are engaged with the plug-in blocks. The side grooves and side strips, and the detachable engagement and setting of the plug-in blocks and the slots can prevent the frame from sliding on the support plate during the up and down movement, thereby ensuring stability.

[0011] As a preferred embodiment, an adjustment groove is provided at the lower interior of the support plate, and an insertion shaft is slidably provided in the adjustment groove. The end of the insertion shaft away from the pushing mechanism is assembled and connected to the interior of the adjustment groove through a first spring, and the end face of the insertion shaft extends outward. A support block is slidably provided at the lower interior of the slot, and the support block is hinged to the top of the insertion shaft through a hinge plate below. In the initial state, the first spring pushes the insertion shaft to extend outward, and the hinge plate is in an inclined state. When the insertion shaft is pushed inward, the first spring is compressed, and the end of the hinge plate connected to the insertion shaft approaches the slot. During the approaching process, the upper end of the hinge plate pushes the support block upward until the insertion block in the slot is pushed out of the slot, which facilitates the separation of the support plate and the frame.

[0012] As a preferred embodiment, the pushing mechanism includes a push plate, a second cylinder, a second spring and a side block. The top of the workbench is assembled and connected to the push plate through the second cylinder. The push plate is slidably arranged above the workbench. The side blocks are provided with two and are symmetrically arranged below the two sides of the push plate. The side blocks are assembled and connected to the push plate through the second spring. In the initial state, the second spring pushes the side block to be flush with the edge of the push plate, and the side block is squeezed with the end face of the plug shaft on the support plate. The push plate only contacts with the frame to push the frame. The side block squeezes the plug shaft to push the plug shaft inward, so that the plug block is ejected from the slot, which is convenient for the separation of the support plate and the frame. The push plate can directly push the frame from the support plate until it falls on the first conveyor belt.

[0013] As a preferred embodiment, the lower interior of the slide rail is assembled and connected to the slider through a third cylinder, an end shaft is provided at one end of the slider that is rotatably connected to the gear, an anti-slip block is provided on the outer wall of the end shaft, and an anti-slip groove is provided on the inner wall of the gear that is engaged with the anti-slip block. By engaging and setting the anti-slip block and the anti-slip groove, the gear will only rotate when it engages and moves with the rack, otherwise it is always fixed relative to the slider.

[0014] As a preferred embodiment, the end shaft output end is provided with a fixed plate, the limit clamps are provided with two and are symmetrically rotatably arranged at both ends of the fixed plate, a fourth cylinder is provided in the slider, the output end of the fourth cylinder passes through the end shaft and the fixed plate and extends between the two limit clamps, the output end of the fourth cylinder is rotatably provided with two connecting strips, the end faces of the connecting strips are respectively rotatably connected to the two limit clamps, and the two limit clamps are driven to clamp or expand by telescopic adjustment of the fourth cylinder, so as to clamp the frame.

[0015] As a preferred embodiment, an angle sensor is provided on the fixed plate, a control box is provided on the workbench, a single-chip microcomputer is provided inside the control box, and the angle sensor is electrically connected to the third cylinder through the single-chip microcomputer. The angle sensor is a device for measuring the rotation angle of an object, which can detect and measure the rotation angle of the measured object relative to a reference point, and convert it into an electrical signal or digital signal related to the angle. The main function of the angle sensor is to provide accurate measurement and real-time monitoring of the object's angle for use in control and feedback systems. The angle sensor is used to accurately measure the rotation angle of the limit clamp, thereby ensuring whether the rotation angle of the frame is accurate.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] 1. The present invention stops rotating the limit clamp after 90 degrees. In this state, the frame is perpendicular to the workbench, which is convenient for the detection mechanism to detect the two sides of the circuit board body on the frame respectively. After the detection of the items on both sides is completed, the slider continues to move up, driving the limit clamp to continue to rotate, and the total rotation angle is 270 degrees. In this state, the circuit board body is still in a vertical state but the two sides are in opposite positions, and the opposite side can be detected by the detection mechanism; the same detection mechanism can also be set in two groups on the fixed frames on both sides of the circuit board body respectively. At this time, the circuit board body only needs to be erected once to complete all the detections on both sides. In this way, the effect of simultaneous detection of the two sides of the circuit board body can be achieved, which improves the detection efficiency, and the clamping of the limit clamp avoids damage to the circuit board body during the flipping process.

[0018] 2. The present invention can prevent the frame from sliding on the support plate during the up and down movement by setting side grooves and side strips, and the detachable card and setting of the plug block and the slot, thereby ensuring stability. In the initial state, the first spring pushes the plug shaft to extend outward, and the hinge plate is in an inclined state. When the plug shaft is pushed inward, the first spring is compressed, and the end of the hinge plate connected to the plug shaft approaches the slot. During the approaching process, the upper end of the hinge plate pushes the support block upward until the plug block in the slot is pushed out of the slot, which facilitates the separation of the support plate and the frame.

[0019] 3. In the initial state of the present invention, the second spring pushes the side block to be flush with the edge of the push plate, and the side block is squeezed with the end face of the plug shaft on the support plate, and the push plate only contacts the frame to push the frame. The side block squeezes the plug shaft to push the plug shaft inward, so that the plug block is ejected from the slot, which is convenient for the separation of the support plate and the frame. The push plate can directly push the frame from the support plate until it falls on the first conveyor belt.

[0020] 4. The present invention ensures the stability of the first conveyor belt and the second conveyor belt when transporting the frame through the locking and setting of the tooth row and the tooth groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional diagram of a circuit board quality detection device provided by the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a loading rack and a workbench of a circuit board quality inspection device provided by the present invention;

[0023] Figure 3 A bottom view of a push plate of a circuit board quality inspection device provided by the present invention;

[0024] Figure 4 A schematic diagram of a loading rack of a circuit board quality inspection device provided by the present invention;

[0025] Figure 5 A schematic diagram of a circuit board quality inspection device provided by the present invention in a state where a frame and a support plate are separated;

[0026] Figure 6 A schematic diagram of the position of the insertion shaft in the support plate in the initial state of a circuit board quality inspection device provided by the present invention;

[0027] Figure 7 A schematic diagram of the internal structure of a support plate of a circuit board quality inspection device provided by the present invention when the first spring is in a compressed state;

[0028] Figure 8 A schematic diagram of a circuit board quality inspection device provided by the present invention showing a frame and an upper frame and a lower frame separated state;

[0029] Fig. 9 A schematic diagram of a circuit board quality inspection device provided by the present invention showing a second conveyor belt and a frame in a state of being separated;

[0030] Fig.10 A schematic diagram of the assembly of a workbench and a fixing frame of a circuit board quality inspection device provided by the present invention;

[0031] Fig.11 A schematic diagram of the assembly of a slide rail and a limit clamp of a circuit board quality inspection device provided by the present invention;

[0032] Fig.12 A schematic diagram of the limit clamp structure of a circuit board quality inspection device provided by the present invention.

[0033] Legend:

[0034] 1. Loading rack; 2. Workbench; 3. Detection mechanism; 4. Loading trough; 5. Frame; 6. Circuit board body; 711. First conveyor belt; 712. Second conveyor belt; 811. Assembly slot; 812. First cylinder; 813. Fixed rack; 814. Slide rail; 815. Slider; 816. Limiting clip; 817. Rack; 818. Gear; 911. Tooth row; 912. Tooth groove; 101. Upper rack; 102. Lower rack; 103. Block; 104. Clamp hole; 111. Rack; 112. Vertical conveyor belt; 11 3. Support plate; 121. Side groove; 122. Side strip; 123. Insert block; 124. Slot; 131. Adjustment groove; 132. Insert shaft; 133. First spring; 135. Support block; 136. Hinge plate; 141. Push plate; 142. Second cylinder; 143. Second spring; 144. Side block; 151. Third cylinder; 152. End shaft; 153. Anti-skid groove; 154. Anti-slip block; 161. Fixed plate; 162. Fourth cylinder; 163. Connecting strip; 171. Rotation angle sensor; 172. Control box. DETAILED DESCRIPTION

[0035] 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.

[0036] See also Figure 1-12 The present invention provides a technical solution: a circuit board quality inspection device, including a loading rack 1, a workbench 2 and a detection mechanism 3, the workbench 2 is provided with a loading trough 4, the loading rack 1 is arranged in the loading trough 4, a frame 5 is placed on the loading rack 1, and the frame 5 is used to limit the edge of the circuit board body 6, a pushing mechanism is provided above the workbench 2 at one end of the loading rack 1, and a frame 5 located at the uppermost end of the loading rack 1 is arranged flush with the pushing mechanism, and a first conveyor belt 711 and a second conveyor belt 712 are sequentially provided above the workbench 2 at the output end of the loading rack 1, and the first conveyor belt 711 and the second conveyor belt 712 have the same structure and are respectively connected to the frame 5 The two sides below are meshed, and an assembly groove 811 is provided above the workbench 2. The lower part of the assembly groove 811 is assembled and connected to the lower part of the second conveyor belt 712 through the first cylinder 812. A fixed frame 813 is provided on the workbench 2 above the assembly groove 811, and the detection mechanism 3 is arranged on the fixed frame 813. Slide rails 814 are symmetrically provided on both sides of the assembly groove 811. A limit clamp 816 is provided in the slide rail 814 through a slider 815 that slides. The two limit clamps 816 are used for clamping and limiting the two sides of the frame 5. A rack 817 is provided on one side of the upper inner wall of the slide rail 814, and a gear 818 meshing with the rack 817 is provided on the limit clamp 816.

[0037] like Figure 1-12 As shown, tooth rows 911 are symmetrically provided on both sides of the outer walls of the first conveyor belt 711 and the second conveyor belt 712, and tooth grooves 912 meshing with the tooth rows 911 are symmetrically provided on both sides below the frame 5. The engagement and setting of the tooth rows 911 and the tooth grooves 912 ensure the stability of the first conveyor belt 711 and the second conveyor belt 712 when transporting the frame 5.

[0038] like Figure 1-12 As shown, an upper frame 101 and a lower frame 102 are respectively provided above and below the inner wall of the frame 5. The lower frame 102 is arranged below the inner wall of the frame 5, and the upper frame 101 is slidably arranged above the inner wall of the frame 5. A clamping block 103 is provided above the lower frame 102, and a clamping hole 104 is provided on the upper frame 101 to be clamped with the clamping block 103. The circuit board body 6 is placed between the upper frame 101 and the lower frame 102. Through the cooperation between the upper frame 101 and the lower frame 102, the circuit board body 6 is assembled in the frame 5 and stably arranged.

[0039] like Figure 1-12 As shown, the loading rack 1 includes a frame body 111 and a vertical conveyor belt 112. Two vertical conveyor belts 112 are provided and are symmetrically arranged. The outer wall of the vertical conveyor belt 112 is provided with a support plate 113. The lower sides of the frame 5 are respectively located on two support plates 113 on the same horizontal plane on the opposite side of the two vertical conveyor belts 112. Through the synchronous rotation of the opposite conveyor belts 112, the frame 5 can be driven to move upward smoothly to achieve the effect of uniform loading.

[0040] like Figure 1-12 As shown, side grooves 121 are symmetrically provided on both sides below the frame 5, side strips 122 are provided above the support plate 113 and are slidably engaged with the side grooves 121, a plurality of plug blocks 123 are slidably provided below the side grooves 121, and a plurality of slots 124 are provided above the support plate 113 and are engaged with the plug blocks 123. The side grooves 121 and the side strips 122, and the plug blocks 123 and the slots 124 are detachably engaged and arranged, so that the frame 5 can be prevented from sliding on the support plate 113 during the up and down movement, thereby ensuring stability.

[0041] like Figure 1-12As shown, an adjustment groove 131 is provided at the lower part of the support plate 113, and an insertion shaft 132 is slidably provided in the adjustment groove 131. The end of the insertion shaft 132 away from the pushing mechanism is assembled and connected with the inside of the adjustment groove 131 through a first spring 133, and the end face of the insertion shaft 132 extends outward. A support block 135 is slidably provided at the lower part of the slot 124, and the support block 135 is connected to the upper part of the insertion shaft 132 through a hinge plate 136. In the initial state, the first spring 133 pushes the insertion shaft 132 to extend outward, and the hinge plate 136 is in an inclined state. When the insertion shaft 132 is pushed inward, the first spring 133 is compressed, and the end of the hinge plate 136 connected to the insertion shaft 132 approaches the slot 124. During the approaching process, the upper end of the hinge plate 136 pushes the support block 135 upward until the insertion block 123 in the slot 124 is pushed out of the slot 124, which facilitates the separation of the support plate 113 and the frame 5.

[0042] like Figure 1-12 As shown, the pushing mechanism includes a push plate 141, a second cylinder 142, a second spring 143 and a side block 144. The top of the workbench 2 is assembled and connected with the push plate 141 through the second cylinder 142. The push plate 141 is slidably arranged above the workbench 2. Two side blocks 144 are symmetrically arranged below the two sides of the push plate 141. The side blocks 144 are assembled and connected with the push plate 141 through the second spring 143. In the initial state, the second spring 143 pushes the side block 144 to be flush with the edge of the push plate 141. The side block 144 is squeezed with the end face of the plug shaft 132 on the support plate 113, and the push plate 141 only contacts with the frame 5 to push the frame 5. The side block 144 squeezes the plug shaft 132 to push the plug shaft 132 inward, so that the plug block 123 is ejected from the slot 124, which is convenient for the support plate 113 to separate from the frame 5. The push plate 141 can directly push the frame 5 from the support plate 113 until it falls on the first conveyor belt 711.

[0043] like Figure 1-12 As shown, the lower part of the inner part of the slide rail 814 is assembled and connected to the slider 815 through the third cylinder 151, and the end of the slider 815 that is rotatably connected to the gear 818 is provided with an end shaft 152, the outer wall of the end shaft 152 is provided with an anti-slip slider 154, and the inner wall of the gear 818 is provided with an anti-slip groove 153 that is locked and set with the anti-slip slider 154. Through the locking and setting of the anti-slip slider 154 and the anti-slip groove 153, the gear 818 will only rotate when it is engaged and moved with the rack 817, otherwise it is always fixed relative to the slider 815.

[0044] like Figure 1-12As shown, a fixed plate 161 is provided at the output end of the end shaft 152, two limit clamps 816 are provided and symmetrically rotated at both ends of the fixed plate 161, a fourth cylinder 162 is provided in the slider 815, the output end of the fourth cylinder 162 passes through the end shaft 152 and the fixed plate 161 and extends between the two limit clamps 816, and two connecting strips 163 are rotatably provided at the output end of the fourth cylinder 162, and the end faces of the connecting strips 163 are rotatably connected to the two limit clamps 816 respectively, and the two limit clamps 816 are driven to clamp or expand by telescopic adjustment of the fourth cylinder 162, so as to clamp the frame 5.

[0045] like Figure 1-12 As shown, a rotation angle sensor 171 is provided on the fixed plate 161, a control box 172 is provided on the workbench 2, a single chip microcomputer is provided inside the control box 172, and the rotation angle sensor 171 is electrically connected to the third cylinder 151 through the single chip microcomputer. The rotation angle sensor 171 is a device for measuring the rotation angle of an object, which can detect and measure the rotation angle of the measured object relative to a reference point, and convert it into an electrical signal or a digital signal related to the rotation angle. The main function of the rotation angle sensor 171 is to provide accurate measurement and real-time monitoring of the rotation angle of the object, so as to be used for the control and feedback system. The rotation angle sensor 171 is convenient for accurately measuring the rotation angle of the limit clamp 816, thereby ensuring whether the rotation angle of the frame 5 is accurate.

[0046] Working principle:

[0047] When quality inspection is performed on a circuit board that requires double-sided inspection, the circuit board body 6 is fixed in advance in the frame 5 so that the frame 5 clamps and fixes the portion of the edge of the circuit board body 6 that does not need to be inspected, and then the frames 5 are stacked up and placed on the loading rack 1. The loading rack 1 is set in the loading trough 4. The loading rack 1 is driven to drive the frames 5 to be evenly transported upward. The lower surface of the uppermost frame 5 is flush with the top of the workbench 2. The pushing mechanism is driven to push the upper frame 5 away from the loading rack 1 and move it to the first conveyor belt 711, and then the first The conveyor belt 711 moves to the second conveyor belt 712. When the frame 5 just moves to the second conveyor belt 712, the limit clamp 816 is driven to clamp the two sides of the frame 5. At the same time, the first cylinder 812 is driven to contract to drive the second conveyor belt 712 to move downward. At this time, the frame 5 is completely moved by the limit clamp 816 and separated from the second conveyor belt 712. At this time, the slider 815 is moved up a distance. During the upward movement, the gear 818 is meshed with the rack 817 to drive the gear 818 to rotate, thereby driving the limit clamp 816 to rotate. When the limit clamp 816 is in the position of the limit clamp 816, the gear 818 is engaged with the rack 817 to drive the gear 818 to rotate. 16 is rotated 90 degrees and then stopped. In this state, the frame 5 is perpendicular to the workbench 2, which is convenient for the detection mechanism 3 to detect the two sides of the circuit board body 6 on the frame 5 respectively. After the detection of the items on both sides is completed, the slider 815 continues to move up, driving the limit clamp 816 to continue to rotate, and the total rotation angle is 270 degrees. In this state, the circuit board body 6 is still in a vertical state but the positions of the two sides are opposite, and the opposite side can be detected by the detection mechanism 3; the same detection mechanism can also be set up in two groups on the fixed frames on both sides of the circuit board body, at this time only The circuit board body only needs to be erected once to complete all inspections on both sides. In this way, the two sides of the circuit board body 6 can be inspected simultaneously, which improves the inspection efficiency. The clamping of the limit clamp 816 avoids damage to the circuit board body 6 during the flipping process. After the inspection of both sides is completed, the slider 815 moves downward, driving the limit clamp 816 and the frame 5 to move downward, driving the frame 5 to rotate in the opposite direction, and moving the second conveyor belt 712 upward until the frame 5 falls stably on the second conveyor belt 712, and the frame 5 is transported and unloaded by the second conveyor belt 712.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A circuit board quality detection device, characterized in that: The invention comprises a loading rack (1), a workbench (2) and a detection mechanism (3), wherein the workbench (2) is provided with a loading trough (4), the loading rack (1) is arranged in the loading trough (4), a frame (5) is placed on the loading rack (1), and the frame (5) is used to limit the edge of the circuit board body (6), a pushing mechanism is provided above the workbench (2) at one end of the loading rack (1), and the frame (5) located at the uppermost end of the loading rack (1) is arranged flush with the pushing mechanism, and a first conveyor belt (711) and a second conveyor belt (712) are arranged in sequence above the workbench (2) at the output end of the loading rack (1), the first conveyor belt (711) and the second conveyor belt (712) have the same structure and are respectively arranged to mesh with the two sides below the frame (5), and the workbench ( 2) an assembly groove (811) is provided above, the lower part of the assembly groove (811) is assembled and connected with the lower part of the second conveyor belt (712) through a first cylinder (812), a fixing frame (813) is provided on the workbench (2) above the assembly groove (811), the detection mechanism (3) is arranged on the fixing frame (813), slide rails (814) are symmetrically provided on both sides of the assembly groove (811), and a limiting clamp (816) is slidably provided in the slide rails (814) through a slider (815), and the two limiting clamps (816) are used to clamp and limit the two sides of the frame (5), a rack (817) is provided on one side of the upper inner wall of the slide rail (814), and a gear (818) is provided on the limiting clamp (816) to mesh with the rack (817).

2. A circuit board quality detection device according to claim 1, characterized in that: Tooth rows (911) are symmetrically provided on both sides of the outer walls of the first conveyor belt (711) and the second conveyor belt (712), and tooth grooves (912) meshing with the tooth rows (911) are symmetrically provided on both sides below the frame (5).

3. A circuit board quality inspection device according to claim 1, characterized in that: An upper frame (101) and a lower frame (102) are respectively arranged above and below the inner wall of the frame (5); the lower frame (102) is arranged below the inner wall of the frame (5); the upper frame (101) is slidably arranged above the inner wall of the frame (5); a clamping block (103) is arranged above the lower frame (102); a clamping hole (104) is arranged on the upper frame (101) and is clamped with the clamping block (103); and the circuit board body (6) is placed between the upper frame (101) and the lower frame (102).

4. A circuit board quality inspection device according to claim 1, characterized in that: The loading rack (1) comprises a frame body (111) and a vertical conveyor belt (112), wherein two vertical conveyor belts (112) are provided and are symmetrically arranged, and a support plate (113) is provided on the outer wall of the vertical conveyor belt (112), and the lower sides of the frame (5) are respectively located on two support plates (113) on the same horizontal plane on the opposite side of the two vertical conveyor belts (112).

5. A circuit board quality inspection device according to claim 4, characterized in that: Side grooves (121) are symmetrically arranged on both sides below the frame (5); side strips (122) are arranged above the support plate (113) and are slidably engaged with and arranged in the side grooves (121); a plurality of insert blocks (123) are slidably arranged at intervals below the side grooves (121); and a plurality of slots (124) are arranged above the support plate (113) and are engaged with and arranged in the insert blocks (123).

6. A circuit board quality inspection device according to claim 5, characterized in that: An adjusting groove (131) is provided at the lower part of the support plate (113), and an insert shaft (132) is slidably provided in the adjusting groove (131). The end of the insert shaft (132) away from the pushing mechanism is assembled and connected with the inside of the adjusting groove (131) through a first spring (133), and the end face of the insert shaft (132) extends outward. A supporting block (135) is slidably provided at the lower part of the slot (124), and the lower part of the supporting block (135) is hinged to the upper part of the insert shaft (132) through a hinge plate (136).

7. A circuit board quality inspection device according to claim 6, characterized in that: The pushing mechanism comprises a pushing plate (141), a second cylinder (142), a second spring (143) and a side block (144); the push plate (141) is assembled and connected to the top of the workbench (2) through the second cylinder (142); the push plate (141) is slidably arranged above the workbench (2); two side blocks (144) are provided and symmetrically arranged below both sides of the pushing plate (141); the side blocks (144) are assembled and connected to the pushing plate (141) through the second spring (143).

8. A circuit board quality inspection device according to claim 1, characterized in that: The lower part of the inner part of the slide rail (814) is assembled and connected to the slider (815) through a third cylinder (151); one end of the slider (815) rotatably connected to the gear (818) is provided with an end shaft (152); the outer wall of the end shaft (152) is provided with an anti-slip block (154); the inner wall of the gear (818) is provided with an anti-slip groove (153) that is engaged and arranged with the anti-slip block (154).

9. A circuit board quality inspection device according to claim 8, characterized in that: A fixing plate (161) is provided at the output end of the end shaft (152); two limiting clamps (816) are provided and are symmetrically rotatably arranged at both ends of the fixing plate (161); a fourth cylinder (162) is provided in the slider (815); the output end of the fourth cylinder (162) passes through the end shaft (152) and the fixing plate (161) and extends between the two limiting clamps (816); two connecting strips (163) are rotatably provided at the output end of the fourth cylinder (162); end surfaces of the connecting strips (163) are rotatably connected to the two limiting clamps (816) respectively.

10. A circuit board quality inspection device according to claim 9, characterized in that: The fixing plate (161) is provided with a rotation angle sensor (171), the workbench (2) is provided with a control box (172), a single chip microcomputer is provided inside the control box (172), and the rotation angle sensor (171) is electrically connected to the third cylinder (151) via the single chip microcomputer.

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