Feeding equipment for detecting circuit board

Abstract

The utility model discloses feeding equipment for detecting a circuit board, which comprises a base, a lifting platform, two reciprocating mechanisms and two lifting mechanisms, the base is provided with a frame, the frame is provided with a lifting mechanism, the base is provided with a first conveyor belt, the frame is internally provided with a second conveyor belt, the lifting platform is connected with the lifting mechanism in a sliding manner, and the lifting mechanism is connected with the lifting mechanism in a sliding manner. Two connecting arms extend from one end of the lifting table, supporting assemblies are installed on the connecting arms, the two reciprocating mechanisms are close to the two sides of the frame respectively, each reciprocating mechanism comprises a driving assembly, a first annular chain and a second annular chain, the driving assemblies are installed on the frame, and the first annular chains and the second annular chains are arranged on the driving assemblies in a sleeving mode. The two ends of the lifting mechanism are rotationally connected with the first annular chain and the second annular chain correspondingly, and the lifting mechanism reciprocates between the discharging area and the second conveying belt. The utility model provides a feeding device for detecting a circuit board, which can automatically switch empty trays and realize full-automatic feeding.

Description

Technical Field

[0001] The utility model relates to the field of circuit board transfer, in particular to a feeding device for detecting circuit boards. Background Art

[0002] The Chinese name of PCB is printed circuit board, which is an important electronic component in the power adapter. The circuit board provides functions such as conducting current and changing the flowing voltage for the power adapter. The circuit board is a support for electronic components and a carrier for the electrical connection of electronic components. Multiple conductive sheets are embedded in the circuit board, and the electronic components are fixed on the circuit board. The electronic components are electrically connected to the conductive sheets, and the multiple electronic components fixed on the circuit board are electrically connected to each other through the conductive sheets, thereby realizing the operation of the circuit board.

[0003] After the electronic components are installed on the circuit board, it is necessary to detect the circuit board to check whether its appearance and functions are qualified. At present, most circuit boards adopt an automated detection method. Multiple circuit boards are placed in a tray after production. The tray can hold multiple circuit boards, which is convenient for transferring and protecting the circuit boards. The pneumatic suction cup of the feeding mechanism sucks up the circuit boards in the tray, and the pneumatic suction cup slides on the traveling device to transfer the circuit boards to the detection mechanism.

[0004] After the above pneumatic suction cup transfers all the circuit boards in the tray out, it is necessary for workers to take away the tray and put in a new tray containing circuit boards, so that the pneumatic suction cup can continue to transfer circuit boards for detection. However, the process of manually replacing the tray is troublesome, which reduces the efficiency of the pneumatic suction cup in transferring circuit boards. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a feeding device for detecting circuit boards, which can automatically switch empty trays and realize full-automatic feeding.

[0006] The technical solution adopted by the feeding device for detecting circuit boards disclosed by the utility model is:

[0007] It includes a base, a lifting platform, two reciprocating mechanisms and two lifting mechanisms. A frame is provided on the base. A lifting mechanism is provided on the frame. The top of the lifting mechanism is provided with a loading area, and the bottom of the lifting mechanism is provided with a unloading area. A first conveyor belt is provided on the base, and one end of the first conveyor belt is located in the loading area. A second conveyor belt is provided in the frame. The second conveyor belt is close to the unloading area and is located above the first conveyor belt. The lifting platform is slidably connected to the lifting mechanism. Two connecting arms extend from one end of the lifting platform. A support assembly is installed on the connecting arms. The support assemblies on the two connecting arms are close to each other. The two reciprocating mechanisms are respectively close to both sides of the frame. The reciprocating mechanism includes a driving assembly, a first endless chain and a second endless chain. The driving assembly is installed on the frame. The first endless chain and the second endless chain are both sleeved on the driving assembly. The first endless chain and the second endless chain are on the same horizontal straight line. The two ends of the lifting mechanism are respectively rotatably connected to the first endless chain and the second endless chain. The two lifting mechanisms are respectively close to both sides of the second conveyor belt. The lifting platform reciprocates between the loading area and the unloading area, and the lifting mechanism reciprocates between the unloading area and the second conveyor belt.

[0008] As a preferred solution, two connecting arms extend from the top of the frame. The reciprocating mechanism and the lifting mechanism are located between the two connecting arms, and the two reciprocating mechanisms are respectively placed on the two connecting arms.

[0009] As a preferred solution, the driving assembly includes two first sprockets, two second sprockets and a reciprocating motor. The centers of the first sprocket and the second sprocket are both fixedly connected with a central shaft. The central shaft is rotatably connected to the connecting arm. The central shaft of one of the first sprockets penetrates through the connecting arm, and a first pulley is fixedly connected to the central shaft of one of the first sprockets. The central shaft of the second sprocket penetrates through the connecting arm, and a second pulley is fixedly connected to the central shaft of the second sprocket. The first endless chain is sleeved on the outer sides of the two first sprockets, and the second endless chain is sleeved on the outer sides of the two second sprockets. The reciprocating motor is fixedly connected to the connecting arm, and a third pulley is fixedly connected to the output shaft of the reciprocating motor. A first transmission belt is sleeved on the first pulley and one of the second pulleys, and a second transmission belt is sleeved on the other second pulley and the third pulley.

[0010] As a preferred solution, the lifting mechanism includes a connecting seat and a sliding plate. First connecting brackets and second connecting brackets are respectively installed at both ends of the connecting seat. The first connecting bracket is rotatably connected to a first endless chain, and the second connecting bracket is rotatably connected to a second endless chain. The sliding plate is slidably connected to the connecting seat. A step is provided on the outer side of the sliding plate, which is close to the upper side of the lifting platform. A bushing extends from the outer side of the connecting seat, and a thread is provided on the inner wall of the bushing. A screw rod is connected in the bushing in a matching manner, and the screw rod is rotatably connected to the sliding plate.

[0011] As a preferred solution, a guide wheel is sleeved on the outer side of the bushing. A guide plate is fixedly connected to the connecting arm. The guide plate is close to the lifting mechanism. A chute is provided on the guide plate, and the guide wheel is in sliding contact with the inner wall of the chute.

[0012] As a preferred solution, there are two support components on the connecting arm. The support component includes a connecting bracket, a slider, a screw, and a fixing block. The connecting bracket is fixedly connected to the connecting arm. A through groove is provided at the top of the connecting bracket, and an installation groove penetrating the connecting bracket is provided at the bottom of the through groove. One end of the screw sequentially penetrates the slider and the installation groove and is in matching connection with the fixing block.

[0013] As a preferred solution, the lifting mechanism includes two optical rods, a lead screw, and a lifting motor. Both ends of the optical rods are fixedly connected to the inner wall of the frame. Both ends of the lead screw are rotatably connected to the inner wall of the frame. The two optical rods are respectively located on both sides of the lead screw. The lead screw and the optical rods are parallel to each other. One end of the lead screw penetrates the base, and a fourth belt pulley is fixedly connected to one end of the lead screw. The lifting motor is fixedly connected to the base, and a fifth belt pulley is fixedly connected to the output shaft of the lifting motor. A third transmission belt is sleeved on the fourth belt pulley and the fifth belt pulley.

[0014] As a preferred solution, a first infrared sensor is provided on the first conveyor belt, and the first infrared sensor faces upward above the first conveyor belt. A second infrared sensor is provided on the second conveyor belt, and the second infrared sensor faces upward above the second conveyor belt. A third infrared sensor is provided on the frame, and the third infrared sensor faces the inside of the blanking area.

[0015] The beneficial effects of a feeding device for detecting circuit boards disclosed by the present utility model are:

[0016] The lifting mechanism drives the lifting platform to descend into the loading area. Multiple trays are stacked on top of each other. The stacked trays are transported by the first conveyor belt and move into the loading area. The lifting mechanism drives the lifting platform to rise, and the support assembly lifts the stacked trays and rises together into the unloading area. The driving assembly drives the first endless chain and the second endless chain to run. The first endless chain and the second endless chain drive the lifting mechanism to approach the trays, so that the lifting mechanism moves to both sides of the bottom of the top tray. After the circuit board in the top tray is transported away by an external pneumatic suction cup, the driving assembly drives the first endless chain and the second endless chain to run. The first endless chain and the second endless chain drive the lifting mechanism to rise a certain distance and then move towards the direction of the second conveyor belt, so that the lifting mechanism lifts the tray and transports it above the second conveyor belt. Then, the first endless chain and the second endless chain drive the lifting mechanism to descend a certain distance, so that the lifting mechanism places the tray on the second conveyor belt and the lifting mechanism moves away from the tray, completing the removal of the empty tray from the equipment. After the empty tray is taken away by the lifting mechanism, the lifting mechanism drives the lifting platform to rise by the height of one tray again, so that the tray on the lifting platform enters the unloading area. Thus, the automatic unloading of the empty tray on the equipment and the automatic placement of the tray containing the circuit board are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a feeding device for detecting circuit boards according to the present utility model.

[0018] Figure 2 is a schematic structural diagram of the lifting mechanism and the lifting platform of a feeding device for detecting circuit boards according to the present utility model.

[0019] Figure 3 is a schematic structural diagram of the support assembly of a feeding device for detecting circuit boards according to the present utility model.

[0020] Figure 4 is a schematic structural diagram of the reciprocating mechanism and the lifting mechanism of a feeding device for detecting circuit boards according to the present utility model.

[0021] Figure 5 is a partial schematic structural diagram of the structure of the reciprocating mechanism and the lifting mechanism of a feeding device for detecting circuit boards according to the present utility model.

[0022] Figure 6 is a partial schematic structural diagram of the structure of the reciprocating mechanism and the lifting mechanism of a feeding device for detecting circuit boards according to the present utility model.

[0023] Figure 7 is a schematic operation diagram of the lifting mechanism of a feeding device for detecting circuit boards according to the present utility model.

[0024] Figure 8It is a schematic diagram of the operation of the lifting mechanism of a loading device for detecting circuit boards in the present utility model. Detailed implementation manners

[0025] The present utility model will be further described and explained below in conjunction with specific embodiments and the accompanying drawings of the specification:

[0026] Please refer to Figure 1 。

[0027] A loading device for detecting circuit boards disclosed by the present utility model is used to place a tray 6 containing circuit boards on the device and unload the empty tray 6 on the device from which the circuit boards have been taken away by an external pneumatic suction cup;

[0028] It includes a base 1, a lifting mechanism 2, a lifting table 3, two symmetric reciprocating mechanisms 4 and two symmetric lifting mechanisms 5;

[0029] A frame 11 is provided on the base 1, and the bottom of the frame 11 is fixedly connected to the top of the base 1. In this embodiment, the frame 11 is preferably a rectangular frame structure; two connecting arms 12 extend from the top of the frame 11, and the two connecting arms 12 are respectively close to both sides of the frame 11.

[0030] Please refer to Figure 2 and Figure 3 。

[0031] The lifting mechanism 2 is placed inside the frame 11. The top of the lifting mechanism 2 is provided with a loading area, and the bottom of the lifting mechanism 2 is provided with an unloading area. The lifting mechanism 2 includes two optical rods 21, a lead screw 22 and a lifting motor 23; both ends of the optical rod 21 are fixedly connected to the inner wall of the frame 11, both ends of the lead screw 22 are rotatably connected to the inner wall of the frame 11, the two optical rods 21 are respectively located on both sides of the lead screw 22, and the lead screw 22 and the optical rod 21 are parallel to each other;

[0032] Furthermore, one end of the lead screw 22 penetrates through the base 1, and a fourth pulley is fixedly connected to one end of the lead screw 22; the lifting motor 23 is fixedly connected to the base 1, the output shaft of the lifting motor 23 penetrates through the base 1, and a fifth pulley is fixedly connected to the output shaft of the lifting motor 23. A third transmission belt is sleeved on the fourth pulley and the fifth pulley.

[0033] The output shaft of the lifting motor 23 drives the lead screw 22 to rotate forward or backward through the third transmission belt.

[0034] Please refer to Figure 1 、 Figure 2 and Figure 4 。

[0035] A first conveyor belt 13 is provided on the base 1, and one end of the first conveyor belt 13 is located in the loading area; a first infrared sensor 131 is provided on the first conveyor belt 13, the first infrared sensor 131 faces upward above the first conveyor belt 13, and the first infrared sensor 131 is located in the loading area;

[0036] Multiple trays 6 with circuit boards placed therein are stacked on top of each other, and the stacked trays 6 are placed on the first conveyor belt 13. The stacked trays 6 are sent into the loading area through the first conveyor belt 13. When all the empty trays 6 are sent out of the device, the device can replenish the trays 6 with circuit boards placed therein through the first conveyor belt 13; when the stacked trays 6 enter the loading area, the trays 6 block the first infrared sensor 131, and the first conveyor belt 13 stops running.

[0037] A second conveyor belt 14 is provided inside the frame 11. The two sides of the second conveyor belt 14 are respectively fixedly connected to two connecting arms 12, and one end of the second conveyor belt 14 is close to the outside of the unloading area; a second infrared sensor 141 is provided on the second conveyor belt 14, the second infrared sensor 141 faces upward above the second conveyor belt 14, and the second infrared sensor 141 is close to the unloading area; the second conveyor belt 14 is located above the first conveyor belt 13;

[0038] The lifting mechanism 5 lifts the empty tray 6 from the unloading area and places it above the second conveyor belt 14; the empty tray 6 blocks the second infrared sensor 141, and the second conveyor belt 14 runs to send the empty tray 6 out of the device, and can connect the second conveyor belt 14 to the device of the previous process, so that the empty tray 6 returns to the device of the previous process, and the circuit board to be detected can be placed in the empty tray 6.

[0039] Please refer to Figure 2 and Figure 3 .

[0040] The lifting platform 3 is slidably connected to the optical rod 21 and the lead screw 22 of the lifting mechanism 2. The forward or reverse rotation of the lead screw 22 drives the lifting platform 3 to slide up or down on the lifting mechanism 2; one end of the lifting platform 3 extends with two connecting arms 31. The two connecting arms 31 are respectively close to both sides of the lifting platform 3, and there is a certain distance between the two connecting arms 31. When the lifting platform 3 slides down on the lifting mechanism 2 to the loading area, one end of the first conveyor belt 13 is located between the two connecting arms 31; the lifting platform 3 reciprocates between the loading area and the unloading area;

[0041] Furthermore, a support assembly 32 is installed on the connecting arm 31. The support assemblies 32 on the two connecting arms 31 are close to each other, and the support assemblies 32 on the two connecting arms 31 are symmetrical to each other; in this embodiment, it is preferably that there are two support assemblies 32 on the connecting arm 31, and the four support assemblies 32 can respectively support the four corners of the tray 6 to improve the stability of the tray 6 placed on the lifting platform 3;

[0042] Further, the support assembly 32 includes a connecting bracket 321, a slider 322, a screw 323, and a fixing block 324; the connecting bracket 321 is fixedly connected to the connecting arm 31, a through groove is formed at the top of the connecting bracket 321, and a mounting groove penetrating the connecting bracket 321 is formed at the bottom of the through groove; the bottom of the slider 322 is slidably connected to the through groove, and a hole is formed at the top of the slider 322; the fixing block 324 is placed at the bottom of the connecting bracket 321; the screw 323 is placed in the hole, and one end of the screw 323 sequentially penetrates the slider 322 and the mounting groove and is in fit connection with the fixing block 324; the top of the slider 322 abuts against the bottom of the tray 6.

[0043] By rotating the screw 323 to loosen the fit connection with the fixing block 324, the slider 322 can be pulled to slide in the through groove close to or away from the first conveyor belt 13, so that the four support assemblies 32 can adjust the position of the slider 322 supporting the tray 6 according to the width of the tray 6.

[0044] A third infrared sensor 111 is provided on the frame 11, the third infrared sensor 111 faces downward into the blanking area, and the third infrared sensor 111 faces above one of the sliders 322. When the tray 6 stacked on the top is taken away and the third infrared sensor 111 is not blocked by the tray 6 stacked on the top, the lifting mechanism 2 drives the lifting platform 3 to rise a certain distance, so that the tray 6 enters the blanking area and blocks the third infrared sensor 111.

[0045] Please refer to Figures 4 - 8 。

[0046] The two reciprocating mechanisms 4 are respectively close to both sides of the frame 11, the two reciprocating mechanisms 4 are respectively placed on the two connecting arms 12, and the reciprocating mechanisms 4 and the lifting mechanism 5 are located between the two connecting arms 12; the reciprocating mechanism 4 includes a driving component, a first endless chain 41, and a second endless chain 42; both the first endless chain 41 and the second endless chain 42 are sleeved on the driving component, and the first endless chain 41 and the second endless chain 42 are on the same horizontal straight line.

[0047] Further, the driving component includes two first sprockets, two second sprockets, and a reciprocating motor 45; a central shaft is fixedly connected to the center of both the first sprocket and the second sprocket, and the central shaft is rotatably connected to the adjacent connecting arm 12; the central shaft of one of the first sprockets penetrates the connecting arm 12 rotatably connected thereto, and a first pulley is fixedly connected to the central shaft of one of the first sprockets; the central shaft of the second sprocket penetrates the connecting arm 12 rotatably connected thereto, and a second pulley is fixedly connected to the central shaft of the second sprocket.

[0048] Further, the reciprocating motor 45 is fixedly connected to the connecting arm 12. The output shaft of the reciprocating motor 45 penetrates through the connecting arm 12 fixedly connected thereto, and a third pulley is fixedly connected to the output shaft of the reciprocating motor 45; A first transmission belt 43 is sleeved on the outer side of the first pulley and the outer side of one of the adjacent second pulleys, and a second transmission belt 44 is sleeved on the outer side of the other second pulley and the outer side of the third pulley;

[0049] Further, the first endless chain 41 is sleeved on the outer sides of the two first sprockets, and the second endless chain 42 is sleeved on the outer sides of the two second sprockets;

[0050] The output shaft of the reciprocating motor 45 drives the other second pulley to rotate through the second transmission belt 44, so that the second sprocket located on the same central axis as the other second pulley rotates, and the second sprocket drives the second endless chain 42 to run; While the second endless chain 42 is running, one of the second pulleys drives the first pulley to rotate through the first transmission belt 43, so that the first sprocket located on the same central axis as the first pulley rotates, and the first sprocket drives the first endless chain 41 to run.

[0051] Both ends of the lifting mechanism 5 are respectively rotatably connected to the first endless chain 41 and the second endless chain 42, and the two lifting mechanisms 5 are respectively close to both sides of the second conveyor belt 14; The lifting mechanism 5 reciprocates between the blanking area and the second conveyor belt 14;

[0052] Further, the lifting mechanism 5 includes a connecting seat 51 and a sliding plate 52; First connecting brackets 511 and second connecting brackets 512 are respectively installed at both ends of the connecting seat 51. The first connecting bracket 511 is rotatably connected to the first endless chain 41, and the second connecting bracket 512 is rotatably connected to the second endless chain 42; The sliding plate 52 is slidably connected to the connecting seat 51, and a step is provided on the outer side of the sliding plate 52. The step is close to the upper side of the lifting table 3 and is located in the blanking area;

[0053] Further, a bushing extends from the outer side of the connecting seat 51. Threads are provided on the inner wall of the bushing, and a screw rod 521 is connected in the bushing in a matching manner. The screw rod 521 is rotatably connected to the sliding plate 52; A guide wheel 522 is sleeved on the outer side of the bushing;

[0054] Further, a guide plate 121 is fixedly connected to the connecting arm 12. The guide plate 121 is close to the lifting mechanism 5, and a chute is provided on the guide plate 121. The guide wheel 522 is in sliding contact with the inner wall of the chute;

[0055] The two reciprocating motors 45 run synchronously at the same time, so that the running speeds of the two first endless chains 41 and the two second endless chains 42 are the same;

[0056] When the circuit board in the top stacked tray 6 is taken away by an external pneumatic suction cup and the tray 6 becomes an empty tray, the reciprocating mechanism 4 enters the operating state. The rotation connection of the first connection bracket 511 and the first endless chain 41 is close to the bottom of the first endless chain 41. The rotation connection of the second connection bracket 512 and the second endless chain 42 is close to the bottom of the second endless chain 42. The first endless chain 41 and the second endless chain 42 drive the steps of the two lifting mechanisms 5 to move to both sides of the bottom of the empty tray 6 respectively; the rotation connection of the first connection bracket 511 and the first endless chain 41 is close to one of the first sprockets, and bypasses one of the first sprockets and moves to the top of the first endless chain 41. The rotation connection of the second connection bracket 512 and the second endless chain 42 is close to one of the second sprockets, and bypasses one of the second sprockets and moves to the top of the second endless chain 42, so that the lifting mechanism 5 rises a certain height to lift the empty tray 6; the rotation connection of the first connection bracket 511 and the first endless chain 41 is close to the other first sprocket, and bypasses the other first sprocket and moves to the bottom of the first endless chain 41. The rotation connection of the second connection bracket 512 and the second endless chain 42 is close to the other second sprocket, and bypasses the other second sprocket and moves to the bottom of the second endless chain 42, so that the lifting mechanism 5 descends a certain height to place the empty tray 6 on the second conveyor belt 14, and the lifting mechanism 5 moves away from the empty tray 6, and the reciprocating mechanism 4 enters the standby operating state;

[0057] When the first endless chain 41 and the second endless chain 42 drive the lifting mechanism 5 to reciprocate, the guide wheel 522 slides in the chute of the guide plate 121. The chute can limit the sliding direction and distance of the guide wheel 522, thereby improving the stability of the lifting mechanism 5 during reciprocating motion;

[0058] By rotating the screw 521 forward or backward, the screw 521 slides on the bushing, and the screw 521 pulls or pushes the slide plate 52 to slide on the connecting seat 51, and the distance between the two slide plates 52 can be adjusted according to the width of the tray 6.

[0059] The utility model provides a feeding device for detecting a circuit board. The lifting mechanism drives the lifting platform to descend into the feeding area. A plurality of trays are stacked on top of each other. The stacked trays are transported by the first conveyor belt and move into the feeding area. The lifting mechanism drives the lifting platform to rise, and the supporting component lifts the stacked trays and rises together into the discharging area. The driving component drives the first endless chain and the second endless chain to run. The first endless chain and the second endless chain drive the lifting mechanism to approach the trays, so that the lifting mechanism moves to both sides of the bottom of the top tray. After the circuit board in the top tray is transported away by an external pneumatic suction cup, the driving component drives the first endless chain and the second endless chain to run. The first endless chain and the second endless chain drive the lifting mechanism to rise a certain distance and then move towards the direction of the second conveyor belt, so that the lifting mechanism lifts the tray and transports it above the second conveyor belt. Then, the first endless chain and the second endless chain drive the lifting mechanism to descend a certain distance, so that the lifting mechanism places the tray on the second conveyor belt and the lifting mechanism moves away from the tray, completing the removal of the empty tray from the device. After the empty tray is taken away by the lifting mechanism, the lifting mechanism drives the lifting platform to rise by the height of one tray again, so that the tray on the lifting platform enters the discharging area. Thus, the automatic removal of the empty tray from the device and the automatic placement of the tray containing the circuit board are realized.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A feeding device for testing circuit boards, characterized in that: It includes a base, a lifting platform, two reciprocating mechanisms and two lifting mechanisms; The base is provided with a frame, the frame is provided with a lifting mechanism, the top of the lifting mechanism is provided with a loading area, the bottom of the lifting mechanism is provided with a unloading area, the base is provided with a first conveyor belt, one end of the first conveyor belt is located in the loading area, the frame is provided with a second conveyor belt, the second conveyor belt is close to the unloading area, and the second conveyor belt is located above the first conveyor belt; The lifting platform is slidably connected to the lifting mechanism, and two connecting arms extend from one end of the lifting platform. Support components are installed on the connecting arms, and the support components on the two connecting arms are close to each other; The two reciprocating mechanisms are respectively close to two sides of the frame, and the reciprocating mechanisms include a driving assembly, a first ring chain and a second ring chain. The driving assembly is installed on the frame, and the first ring chain and the second ring chain are both sleeved on the driving assembly. The first ring chain and the second ring chain are located on the same water line. The two ends of the lifting mechanism are rotatably connected to the first ring chain and the second ring chain respectively, and the two lifting mechanisms are close to the two sides of the second conveyor belt respectively; The lifting platform reciprocates between the loading area and the unloading area, and the lifting mechanism reciprocates between the unloading area and the second conveyor belt.

2. A feeding device for testing circuit boards according to claim 1, characterized in that: Two connecting arms are extended from the top of the frame, the reciprocating mechanism and the lifting mechanism are located between the two connecting arms, and the two reciprocating mechanisms are respectively placed on the two connecting arms.

3. A feeding device for testing circuit boards as claimed in claim 2, characterized in that: The driving assembly includes two first sprockets, two second sprockets and a reciprocating motor, the centers of the first sprocket and the second sprocket are fixedly connected to a central axis, the central axis is rotatably connected to a connecting arm, the central axis of one of the first sprockets passes through the connecting arm, the central axis of one of the first sprockets is fixedly connected to a first pulley, the central axis of the second sprocket passes through the connecting arm, the central axis of the second sprocket is fixedly connected to a second pulley, the first annular chain is sleeved on the outer sides of the two first sprockets, the second annular chain is sleeved on the outer sides of the two second sprockets, the reciprocating motor is fixedly connected to the connecting arm, the output shaft of the reciprocating motor is fixedly connected to a third pulley, the first pulley and one of the second pulleys are sleeved with a first transmission belt, and the other second pulley and the third pulley are sleeved with a second transmission belt.

4. A feeding device for testing circuit boards as claimed in claim 3, characterized in that: The lifting mechanism includes a connecting seat and a slide plate, and a first connecting bracket and a second connecting bracket are respectively installed at both ends of the connecting seat, the first connecting bracket is rotatably connected to the first ring chain, and the second connecting bracket is rotatably connected to the second ring chain. The slide plate is slidably connected to the connecting seat, and a step is provided on the outer side of the slide plate, and the step is close to the top of the lifting platform. A shaft sleeve extends outward from the connecting seat, and a thread is provided on the inner wall of the shaft sleeve. A screw rod is fitted and connected inside the shaft sleeve, and the screw rod is rotatably connected to the slide plate.

5. A feeding device for testing circuit boards as claimed in claim 4, characterized in that: A guide wheel is sleeved on the outer side of the shaft sleeve, a guide plate is fixedly connected to the connecting arm, the guide plate is close to the lifting mechanism, a sliding groove is provided on the guide plate, and the guide wheel is in sliding contact with the inner wall of the sliding groove.

6. A feeding device for testing circuit boards as claimed in claim 5, characterized in that: There are two supporting components on the connecting arm, and the supporting components include a connecting bracket, a slider, a screw and a fixing block. The connecting bracket is fixedly connected to the connecting arm. A through slot is provided on the top of the connecting bracket, and a mounting slot that passes through the connecting bracket is provided at the bottom of the through slot. One end of the screw passes through the slider and the mounting slot in turn and is connected to the fixing block.

7. A feeding device for testing circuit boards as claimed in claim 6, characterized in that: The lifting mechanism includes two polished rods, a screw rod and a lifting motor, both ends of the polished rods are fixedly connected to the inner wall of the frame, both ends of the screw rods are rotatably connected to the inner wall of the frame, the two polished rods are respectively located on both sides of the screw rod, the screw rod and the polished rod are parallel to each other, one end of the screw rod passes through the base, one end of the screw rod is fixedly connected to the fourth pulley, the lifting motor is fixedly connected to the base, a fifth pulley is fixedly connected to the output shaft of the lifting motor, and a third transmission belt is sleeved on the fourth pulley and the fifth pulley.

8. A feeding device for testing circuit boards as claimed in claim 7, characterized in that: The first conveyor belt is provided with a first infrared sensor, which faces upwards of the first conveyor belt; the second conveyor belt is provided with a second infrared sensor, which faces upwards of the second conveyor belt; the frame is provided with a third infrared sensor, which faces into the unloading area.

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