CN116256619A

CN116256619A - PCB high-voltage-resistant test equipment

Info

Publication number: CN116256619A
Application number: CN202310358861.6A
Authority: CN
Inventors: 王建廷; 杨俊锋; 张振伟
Original assignee: Shenzhen Lianming Power Co ltd
Current assignee: Shenzhen Lianming Power Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-06-13

Abstract

The invention relates to the technical field of PCB high-voltage resistance testing, in particular to PCB high-voltage resistance testing equipment, which comprises a workbench, wherein two groups of conveying belt mechanisms are arranged below the workbench, a fixed plate is arranged on the workbench, a high-voltage tester is arranged on the fixed plate and is connected with a first conductive plate through a group of wires, the first conductive plate is fixedly connected with a first cylinder, and a feeding mechanism with an automatic feeding function is arranged on the workbench; until the PCB board is clamped between the first conductive plates, the second conductive plates, the first conductive plates, the lead and the high-voltage tester form a group of loops, the test on the PCB board is realized, whether the PCB board is good or not can be judged through the high-voltage tester, therefore, the high-voltage tester controls the motor, the motor enables the I-shaped frame to rotate towards the direction of the corresponding conveying belt mechanism through the rotary connecting shaft, the PCB board falls onto the material guiding plate through the blanking hole and slides onto the corresponding conveying belt mechanism along the roller, and therefore automatic blanking of the PCB board is realized, and classification of good products and defective products is realized.

Description

PCB high-voltage-resistant test equipment

Technical Field

The invention relates to the technical field of PCB high-voltage resistance testing, in particular to PCB high-voltage resistance testing equipment.

Background

The PCB, called a printed circuit board, is an important electronic component, is a support for electronic components, and is a carrier for electrical interconnection of electronic components. Since it is made by electronic printing, it is called "printed" circuit board, PCB, i.e. printed wiring board, which is one of the important parts of electronic industry, almost every electronic device, as small as electronic watch, calculator, as large as computer, communication electronic device, military weapon system, and as long as there are electronic components such as integrated circuit, etc., the printed board is used for electrical interconnection between each component.

After the production of the PCB, the PCB needs to be subjected to spot inspection or detection on a batch of PCBs, the high-pressure resistant performance parameters of the PCB are detected, the quality of the PCB put into use is guaranteed to be qualified, the existing high-pressure resistant testing equipment of the PCB comprises a high-pressure tester, the high-pressure tester is connected with two groups of conductive plates through wires, one group of conductive plates is connected with a pneumatic mechanism, the PCB is placed on the other group of conductive plates, the PCB is pressed down by the pneumatic mechanism, the PCB is pressed between the two groups of conductive plates, and a group of complete loops are formed by the high-pressure tester, the wires, the conductive plates and the PCB, so that the test of the PCB by the high-pressure tester is realized.

In the actual testing process, firstly, the PCB is fed and discharged manually by workers, so that the working strength of the workers is increased, meanwhile, the workers need to stretch hands between two groups of conductive plates, the risk that the conductive plates crush the hands of the workers exists, secondly, in the PCB feeding and discharging process, the high-voltage tester is in a shutdown state for testing the PCB, and therefore a large amount of time is wasted in the feeding and discharging process, and the efficiency of testing the PCB is reduced.

Disclosure of Invention

The invention aims to provide a PCB high-voltage-resistant test device for solving the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: the PCB high-voltage-resistant testing equipment comprises a workbench, wherein two groups of conveyor belt mechanisms are arranged below the workbench, a fixed plate is arranged on the workbench, a high-voltage tester is arranged on the fixed plate and is connected with a first conductive plate through a group of wires, the first conductive plate is fixedly connected with a first cylinder, and a feeding mechanism with an automatic feeding function is arranged on the workbench;

the feeding mechanism comprises a fixed box body, a turnover frame is arranged in the fixed box body, a pushing plate is arranged at the upper end of the fixed box body and connected with a second cylinder, an L-shaped rack is arranged on one side of the fixed box body and meshed with a gear, a transmission shaft is connected with the gear, the transmission shaft is connected with a support in a rotating mode, and one end of the transmission shaft is connected with a bevel gear.

Preferably, the fixed box comprises a box body, two groups of openings II are symmetrically formed in two sides of the box body, guide posts are arranged in the openings II, the two groups of guide posts are all in sliding connection with a material supporting plate, and two rows of trapezoidal clamping blocks are symmetrically arranged in two sides of the openings II.

Preferably, the turnover frame comprises a main frame, two groups of openings are symmetrically formed in two sides of the main frame, two groups of shoulders are symmetrically formed in two sides of the upper end of the main frame, a limiting groove is formed in the lower end face of each shoulder, the main frame is located in the box body, the main frame is connected with the box body in an inserting mode, and the limiting groove is connected with the guide column in an inserting mode.

Preferably, the material supporting plate comprises a supporting plate, two groups of guide holes are symmetrically formed in the supporting plate, two groups of first grooves are symmetrically formed in two sides of the end portion of the supporting plate, an L-shaped limiting block is inserted into the first grooves, one end of the L-shaped limiting block is provided with a first inclined surface, the other end of the L-shaped limiting block is provided with a second inclined surface, two groups of limiting rods are symmetrically arranged at two ends of the supporting plate, the limiting rods are connected with two groups of guide posts, two groups of hooks are symmetrically arranged at two ends of the limiting rods, the supporting plate is located in a box body, one end of the supporting plate is fixedly connected with an L-shaped rack, the guide holes are slidably connected with guide posts, four groups of through holes are formed in the supporting plate, the guide posts are slidably connected with the through holes, and springs are placed in the first grooves.

Preferably, each row of trapezoidal clamping blocks consists of a plurality of groups of small trapezoidal blocks and a group of large trapezoidal blocks, and inclined planes III are arranged on the large trapezoidal blocks and the small trapezoidal blocks.

Preferably, the workbench comprises a carrying platform, the upper end of the carrying platform is provided with a conveying groove, a discharging hole and a feeding hole are sequentially formed in the conveying groove, the conveying groove is sequentially adhered with a silica gel pad and a second conductive plate, a transmission plate is arranged on the silica gel pad, a material guiding plate is arranged under the discharging hole, and the lower end of the carrying platform is connected with four groups of supporting legs.

Preferably, six groups of placing grooves are formed in the transmission plate at equal angles, six groups of arc racks are arranged in the transmission plate at equal angles, the middle part of the transmission plate is connected with a driving shaft, the driving shaft is connected with a carrying platform in a rotating mode, the material guiding plate comprises an I-shaped frame, a plurality of groups of rollers are connected with the I-shaped frame in a rotating mode, one side of the I-shaped frame is connected with a rotating shaft, and the rotating shaft is connected with one group of supporting legs in a rotating mode.

Preferably, the feeding hole is right opposite to the fixed box body, the conducting plate is located below the first conducting plate, the fixed box body, the support and the fixed plate are all fixed on the outer ring of the carrier, the high-voltage tester is connected with the second conducting plate through a wire at the other end, and the two groups of conveying belt mechanisms are located below the I-shaped frame.

Compared with the prior art, the invention has the beneficial effects that:

1. when one end of the L-shaped limiting block slides along the inclined plane I of the large trapezoid block, the retreating distance of the L-shaped limiting block along the groove I is increased, and the compression spring quantity is increased, at the moment, the inclined plane II at the other end of the L-shaped limiting block can extrude the clamping hooks at the end part of the limiting rod, so that the limiting rod drives the guide post to slide upwards along the through hole until the other end of the L-shaped limiting block staggers the clamping hooks, under the action of gravity of the limiting rod, the limiting rod moves downwards, and then the clamping hooks are clamped with the other end of the L-shaped limiting block, so that the L-shaped limiting block cannot move, at the moment, the whole group of material supporting plates move downwards until the material supporting plates return to the initial position of the bottom of the box, and meanwhile, the end part of the guide post is pushed by the bottom of the box, so that the clamping hooks are separated from the other end of the L-shaped limiting block, and under the action of the spring resilience, one group of small trapezoid blocks are attached again, at the moment, the PCB in the turnover frame full of the turnover frame is illustrated, so that the PCB can be replaced again, and a plurality of groups of PCB plates can be filled, and the test efficiency is greatly shortened.

2. The PCB is conveyed to the upper portion of the second conductive plate through the transmission plate, the air cylinder drives the first conductive plate to move downwards until the PCB is clamped between the second conductive plates, the first conductive plate, the lead and the high-voltage tester form a group of loops, the PCB is tested, whether good products of the PCB can be judged through the high-voltage tester, the high-voltage tester controls the motor, the I-shaped frame rotates towards the direction of the corresponding conveying belt mechanism through the rotary connecting shaft, the PCB falls onto the conveying plate through the blanking hole, and slides onto the corresponding conveying belt mechanism along the rollers, so that automatic blanking of the PCB is achieved, and classification of good products and defective products is achieved.

Drawings

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is an exploded view of the work table of the present invention.

FIG. 3 is a schematic view of a combination of a feeding mechanism and a drive plate according to the present invention.

Fig. 4 is a schematic view of a turnover frame of the present invention.

FIG. 5 is a schematic diagram showing the combination of the fixed housing and the L-shaped rack

Fig. 6 is a schematic diagram of a combination of a supporting plate and a trapezoid clamping block with partial cross section.

Fig. 7 is an enlarged view at a in fig. 6.

In the figure: 1. a work table; 2. a conveyor belt mechanism; 3. a fixing plate; 4. a high voltage tester; 5. a first conductive plate; 6. a first cylinder; 7. a feeding mechanism; 701. fixing the box body; 702. a turnover frame; 703. a pushing plate; 704. a second cylinder; 705. an L-shaped rack; 706. a gear; 707. a transmission shaft; 708. a support; 709. a bevel gear; 7021. a main frame; 7022. shoulder lifting; 7023. a limit groove; 7024. an opening I; 7011. a case; 7012. an opening II; 7013. a guide post; 7014. a material supporting plate; 7015. a trapezoidal clamping block; 41. a supporting plate; 42. a guide hole; 43. a first groove; 44. an L-shaped limiting block; 45. an inclined plane I; 46. a second inclined plane; 47. a guide post; 48. a limit rod; 49. a clamping hook; 410. a spring; 51. a small trapezoid block; 52. large trapezoid blocks; 53. an inclined plane III; 101. a carrier; 102. a transfer tank; 103. a blanking hole; 104. a feed inlet; 105. a second conductive plate; 106. a silica gel pad; 107. a drive plate; 71. a placement groove; 73. an arc-shaped rack; 108. a drive shaft; 109. a material guide plate; 91. i-shaped frame; 92. a roller; 93. a rotary connecting shaft; 110. and (5) supporting legs.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 7, the present invention provides a technical solution: a PCB high pressure resistant test device comprises a workbench 1, wherein the workbench 1 comprises a carrier 101, a conveying groove 102 is arranged at the upper end of the carrier 101, a discharging hole 103 and a feeding hole 104 are sequentially formed in the conveying groove 102, a silica gel pad 106 and a second conductive plate 105 are sequentially adhered to the conveying groove 102, a transmission plate 107 is arranged on the silica gel pad 106, a material guide plate 109 is arranged right below the discharging hole 103, four groups of supporting legs 110 are connected at the lower end of the carrier 101, six groups of placing grooves 71 are formed at equal angles on the transmission plate 107, six groups of arc racks 73 are arranged at equal angles on the transmission plate 107, a driving shaft 108 is connected at the middle part of the transmission plate 107, the driving shaft 108 is screwed on the carrier 101, the feeding hole 104 is opposite to a fixed box 701, the fixed box 701, a support 708 and the fixed plate 3 are all fixed on the outer ring of the carrier 101, a feeding mechanism 7 with an automatic feeding function is arranged on the workbench 1, the feeding mechanism 7 comprises the fixed box 701, a revolving frame 702 is arranged inside the fixed box 701, the upper end of the fixed box body 701 is provided with a pushing plate 703, the pushing plate 703 is connected with a cylinder II 704, one side of the fixed box body 701 is provided with an L-shaped rack 705, the L-shaped rack 705 is meshed with a gear 706, the gear 706 is connected with a transmission shaft 707, the transmission shaft 707 is screwed with a support 708, one end of the transmission shaft 707 is connected with a bevel gear 709, the fixed box body 701 comprises a box body 7011, two groups of openings II 7012 are symmetrically arranged on two sides of the box body 7011, a guide post 7013 is arranged in the opening II 7012, the two groups of guide posts 7013 are both in sliding connection with a material supporting plate 7014, two rows of trapezoidal clamping blocks 7015 are symmetrically arranged on two sides of the opening II 7012, the turnover frame 702 comprises a main frame 7021, two groups of openings I7024 are symmetrically arranged on two sides of the main frame 7021, two groups of shoulders 7022 are symmetrically arranged on two sides of the upper end of the main frame 7021, a limit groove 7023 is formed on the lower end face of the shoulder 7022, the main frame 7021 is positioned in the box body 7011, the main frame 7021 is spliced with the box body 7011, the limit groove 7013 is spliced with the limit groove 7023, two groups of guide holes 42 are symmetrically formed on the supporting plate 41, two groups of first grooves 43 are symmetrically formed on two sides of the end part of the supporting plate 41, the first grooves 43 are inserted into the L-shaped limiting block 44, one end of the L-shaped limiting block 44 is provided with a first inclined surface 45, the other end of the L-shaped limiting block 44 is provided with a second inclined surface 46, the supporting plate 41 is positioned in the box 7011, one end of the supporting plate 41 is fixedly connected with an L-shaped rack 705, the guide holes 42 are slidably connected with guide posts 7013, springs 410 are placed in the first grooves 43, a plurality of groups of PCB boards are sequentially stacked in the main frame 7021 from bottom to top, the driving shaft 108 is driven by a motor, the feeding hole 104 is opposite to one group of placing grooves 71, when the PCB boards are required to be tested, a turnover frame 702 containing the PCB boards is placed in the box 7011, the two groups of guide posts 7013 are respectively inserted into the limiting grooves 7023, then the pushing plates 703 are pushed by the second cylinders 704, one group of PCB boards are pushed into the one group of placing grooves 71 by the pushing plates 104, the motor drives the transmission plate 107 and six groups of placing grooves 71 to rotate along the transmission groove 102 through the driving shaft 108, one group of placing grooves 71 drives the PCB to rotate towards the high-voltage tester 4 until the next group of placing grooves 71 are opposite to the feeding hole 104, in the process, the corresponding arc-shaped racks 73 on one side of the next group of placing grooves 71 are meshed with the bevel gears 709, the bevel gears 709 rotate the gears 706 through the driving shaft 707, the gears 706 drive the L-shaped racks 705 to move upwards, the L-shaped racks 705 drive the supporting plate 41 to drive the PCB in the turnover frame 702 upwards along the two groups of openings II 7012, meanwhile, the inclined plane I45 on one end of the L-shaped limiting block 44 is extruded by the group of small trapezoid blocks 51, the L-shaped limiting block 44 is retracted along the groove I43, the springs 410 are compressed until one end of the L-shaped limiting block 44 is staggered with the current small trapezoid blocks 51 under the elastic force of the springs 410, one end of the L-shaped limiting block 44 is positioned between the two groups of small trapezoid blocks 51, meanwhile, the arc-shaped racks 73 just stagger the bevel gears 709, and the rising height of the PCB in the turnover frame 702 is a group of PCB thickness, so that the PCB in the turnover frame 702 rises by a group of PCB thickness every time the transmission plate 107 rotates once, the PCB is arranged on one side of the forward direction of the pushing plate 703, and automatic feeding of the transmission plate 107 can be realized.

Two groups of limiting rods 48 are symmetrically arranged at two ends of the supporting plate 41, the limiting rods 48 are connected with two groups of guide posts 47, two groups of hooks 49 are symmetrically arranged at two ends of the limiting rods 48, four groups of through holes are formed in the supporting plate 41, the guide posts 47 are in sliding connection with the through holes, each row of trapezoidal clamping blocks 7015 consists of a plurality of groups of small trapezoidal blocks 51 and a group of large trapezoidal blocks 52, the large trapezoidal blocks 52 and the small trapezoidal blocks 51 are respectively provided with an inclined plane III 53, wherein the widths of the large trapezoidal blocks 52 and the small trapezoidal blocks 51 are consistent, the height dimension of the large trapezoidal blocks 52 is larger than that of the small trapezoidal blocks 51, so that the stroke of an inclined plane I45 of the large trapezoidal blocks 52 is larger than that of the small trapezoidal blocks 51, when one end of an L-shaped limiting block 44 slides along the inclined plane I45 of the large trapezoidal blocks 52, the retreating distance of the L-shaped limiting block 44 is increased along the groove I43, the compression spring 410 is increased, at the moment, the inclined plane II 46 at the other end of the L-shaped limiting block 44 can be extruded onto the hooks 49 at the end part of the limiting rods 48, the limiting rod 48 drives the guide post 47 to slide upwards along the through hole until the other end of the L-shaped limiting block 44 is staggered with the clamping hook 49, the limiting rod 48 moves downwards under the action of the gravity of the limiting rod 48, the clamping hook 49 is clamped with the other end of the L-shaped limiting block 44, the L-shaped limiting block 44 cannot move, at the moment, the whole group of material supporting plates 7014 move downwards until the material supporting plates 7014 return to the initial position at the bottom of the box 7011, meanwhile, the end part of the guide post 47 is pushed by the bottom of the box 7011, the clamping hook 49 is separated from the other end of the L-shaped limiting block 44, one end of the L-shaped limiting block 44 is attached to a group of small trapezoid blocks 51 again under the rebound force of the spring 410, at the moment, the fact that the PCB in the turnover frame 702 filled with the PCB is used up is explained, the turnover frame 702 filled with the PCB can be replaced again, so that a plurality of groups of PCB boards can be filled at one time, the material changing time and the shutdown time are greatly shortened, thereby improving the test efficiency of the PCB.

Two groups of conveyor belt mechanisms 2 are arranged below the workbench 1, a fixed plate 3 is arranged on the workbench 1, a high-voltage tester 4 is arranged on the fixed plate 3, the high-voltage tester 4 is connected with a first conductive plate 5 through a group of wires, the first conductive plate 5 is fixedly connected with a first cylinder 6, a material guiding plate 109 comprises an I-shaped frame 91, a plurality of groups of rollers 92 are screwed on the I-shaped frame 91, one side of the I-shaped frame 91 is connected with a screwing shaft 93, the rotary connecting shaft 93 is in rotary connection with a group of supporting legs 110, the second conductive plate 105 is positioned below the first conductive plate 5, the high-voltage tester 4 is connected with the second conductive plate 105 through a wire at the other end, the two groups of conveying belt mechanisms 2 are positioned below the I-shaped frame 91, wherein, one group of conveying belt mechanisms 2 conveys good products, the other group of conveying bad products, the rotary connecting shaft 93 is driven by a motor, the PCB is conveyed to the upper portion of the second conductive plate 105 through the transmission plate 107, the first cylinder 6 drives the first conductive plate 5 to move downwards until the PCB is clamped between the first conductive plates 105, the first conductive plates 5, the second conductive plates 105, the first conductive plates 5, the wires and the high-voltage tester 4 form a group of loops, the PCB is tested, whether good products of the PCB can be judged through the high-voltage tester 4, the high-voltage tester 4 controls a motor, the motor enables the I-shaped frame 91 to rotate towards the corresponding conveying belt mechanism 2 through the rotating shaft 93, the PCB falls onto the guide plate 109 through the blanking hole 103 and slides onto the corresponding conveying belt mechanism 2 along the rollers 92, and therefore automatic blanking of the PCB is achieved, and classification of good products and defective products is achieved.

In the use process, the turnover frame 702 containing the PCB is placed in the box body 7011, two groups of guide posts 7013 are respectively inserted into the limit grooves 7023, then the second cylinder 704 pushes the pushing plate 703, the pushing plate 703 pushes one group of PCB to enter one group of the placement grooves 71 through the feeding hole 104, the motor drives the transmission plate 107 and the six groups of placement grooves 71 to rotate along the transmission groove 102 through the driving shaft 108, the one group of placement grooves 71 drives the PCB to rotate towards the high-voltage tester 4 until the next group of placement grooves 71 is opposite to the feeding hole 104, in the process, the corresponding arc-shaped racks 73 on one side of the next group of placement grooves 71 mesh with the bevel gears 709, the bevel gears 709 rotate, the bevel gears 709 enable the gears 706 to rotate through the driving shaft 707, the gears 706 drive the L-shaped racks 705 to move upwards, the L-shaped racks 705 drive the supporting plates 41 to upwards support the PCB in the turnover frame 702 along the two groups of openings two 7012, meanwhile, the inclined plane I45 at one end of the L-shaped limiting block 44 is extruded by a group of small trapezoid blocks 51, so that the L-shaped limiting block 44 retreats along the groove I43, the spring 410 is compressed until one end of the L-shaped limiting block 44 is staggered with the current small trapezoid blocks 51, one end of the L-shaped limiting block 44 is positioned between the two groups of small trapezoid blocks 51 under the action of the elastic force of the spring 410, meanwhile, the arc-shaped rack 73 is just staggered with the bevel gear 709, the lifting height of a PCB in the revolving rack 702 is equal to the thickness of a group of PCBs, the PCB is conveyed to the upper part of the conductive plate II 105 through the transmission plate 107, at the moment, the first cylinder 6 drives the conductive plate I5 to move downwards until the PCB is clamped between the conductive plates II 105, the PCB, the conductive plate II 105, the conductive plate I5, the lead and the high-voltage tester 4 form a group of loops, the test on the PCB is realized, whether the PCB is good or not can be judged through the high-voltage tester 4, the high voltage tester 4 thus controls the motor, which rotates the i-frame 91 through the swivel shaft 93 towards the corresponding conveyor 2, causing the PCB to drop onto the guide plate 109 through the blanking hole 103 and slide along the rollers 92 onto the corresponding conveyor 2.

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

Claims

1. The utility model provides a high-pressure test equipment of PCB, includes workstation (1), workstation (1) below sets up two sets of conveyer belt mechanisms (2), sets up fixed plate (3) on workstation (1), set up high-pressure tester (4) on fixed plate (3), high-pressure tester (4) are connected with conducting plate one (5) through a set of wire, conducting plate one (5) fixed connection cylinder one (6), its characterized in that: a feeding mechanism (7) with an automatic feeding function is arranged on the workbench (1);

the feeding mechanism (7) comprises a fixed box body (701), a turnover frame (702) is arranged in the fixed box body (701), a pushing plate (703) is arranged at the upper end of the fixed box body (701), the pushing plate (703) is connected with a cylinder II (704), an L-shaped rack (705) is arranged on one side of the fixed box body (701), the L-shaped rack (705) is meshed with a gear (706), the gear (706) is connected with a transmission shaft (707), the transmission shaft (707) is connected with a support (708) in a rotating mode, and one end of the transmission shaft (707) is connected with a conical gear (709).

2. The high voltage testing apparatus of claim 1, wherein: the fixed box body (701) comprises a box body (7011), two groups of openings II (7012) are symmetrically formed in two sides of the box body (7011), guide posts (7013) are arranged in the openings II (7012), the two groups of guide posts (7013) are all in sliding connection with a material supporting plate (7014), and two rows of trapezoidal clamping blocks (7015) are symmetrically arranged in two sides of the openings II (7012).

3. The high voltage testing apparatus of claim 2, wherein: the turnover frame (702) comprises a main frame (7021), two groups of openings I (7024) are symmetrically arranged on two sides of the main frame (7021), two groups of shoulders (7022) are symmetrically arranged on two sides of the upper end of the main frame (7021), a limiting groove (7023) is formed in the lower end face of each shoulder (7022), the main frame (7021) is located in a box body (7011), the main frame (7021) is connected with the box body (7011) in an inserting mode, and the limiting groove (7023) is connected with a guide column (7013) in an inserting mode.

4. The high voltage testing apparatus of claim 2, wherein: the material supporting plate (7014) comprises a supporting plate (41), two groups of guide holes (42) are symmetrically formed in the supporting plate (41), two groups of first grooves (43) are symmetrically formed in two sides of the end portion of the supporting plate (41), an L-shaped limiting block (44) is inserted into the first grooves (43), one end of each L-shaped limiting block (44) is provided with an inclined plane I (45), the other end of each L-shaped limiting block (44) is provided with an inclined plane II (46), two groups of limiting rods (48) are symmetrically arranged at two ends of the supporting plate (41), two groups of guide posts (47) are connected with the limiting rods (48), two groups of hooks (49) are symmetrically arranged at two ends of each limiting rod (48), the supporting plate (41) is located in a box body (7011), one end of the supporting plate (41) is fixedly connected with an L-shaped rack (705), the guide holes (42) are connected with guide posts (7013) in a sliding mode, four groups of through holes are formed in the supporting plate (41), and the guide posts (47) are connected with the sliding connection through holes, and springs (410) are placed in the first grooves (43).

5. The high voltage testing apparatus of claim 2, wherein: each row of trapezoidal clamping blocks (7015) consists of a plurality of groups of small trapezoidal blocks (51) and a group of large trapezoidal blocks (52), and inclined planes III (53) are arranged on the large trapezoidal blocks (52) and the small trapezoidal blocks (51).

6. The high voltage testing apparatus of claim 1, wherein: the workbench (1) comprises a carrying table (101), a conveying groove (102) is formed in the upper end of the carrying table (101), a discharging hole (103) and a feeding hole (104) are sequentially formed in the conveying groove (102), a silica gel pad (106) and a second conductive plate (105) are sequentially adhered to the conveying groove (102), a transmission plate (107) is arranged on the silica gel pad (106), a material guide plate (109) is arranged under the discharging hole (103), and four groups of supporting legs (110) are connected to the lower end of the carrying table (101).

7. The PCB high voltage resistant testing apparatus of claim 6, wherein: six groups of standing grooves (71) are formed in the upper equal angles of the transmission plate (107), six groups of arc racks (73) are arranged in the upper equal angles of the transmission plate (107), a driving shaft (108) is connected to the middle of the transmission plate (107), the driving shaft (108) is connected with the carrying platform (101) in a rotating mode, the material guide plate (109) comprises an I-shaped frame (91), a plurality of groups of rollers (92) are connected to the I-shaped frame (91) in a rotating mode, one side of the I-shaped frame (91) is connected with a rotating shaft (93), and the rotating shaft (93) is connected with a group of supporting legs (110) in a rotating mode.

8. The PCB high voltage resistant testing apparatus of claim 6, wherein: the feeding hole (104) is opposite to the fixed box body (701), the second conductive plate (105) is located below the first conductive plate (5), the fixed box body (701), the support (708) and the fixed plate (3) are all fixed on the outer ring of the carrying platform (101), the high-voltage tester (4) is connected with the second conductive plate (105) through a wire at the other end, and the two groups of conveying belt mechanisms (2) are located below the I-shaped frame (91).