PCB (Printed Circuit Board) test module capable of automatically feeding

Abstract

The utility model discloses a PCB test module group capable of automatic feeding. The PCB test module group comprises a rack; the first guide column is arranged below the rack in the vertical direction; the first mounting plate is movably connected with the first guide column; the upper needle plate assembly is connected below the first mounting plate; the second guide column is movably connected with the first mounting plate in the vertical direction, a column body of the second guide column penetrates through the first mounting plate, a limiting ring is arranged above the second guide column, and the limiting ring is used for keeping the second guide column on the first mounting plate; the wire body assembly is connected to the lower part of the second guide column; the limiting block is arranged below the wire body assembly and used for limiting the descending height of the wire body assembly; and the driving assembly is arranged on the rack and used for driving the first mounting plate to move up and down. Through the structure, manual feeding is not needed in the whole process, the PCBs do not interfere with other components in the automatic feeding and discharging process, normal testing can be carried out, and meanwhile the testing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a PCB testing module with automatic feeding capability. Background Technology

[0002] In PCB testing equipment, the components on the PCB are of varying heights, as are the positioning and detection equipment. The conveyor line can interfere with these components, and the conveyor line that extends above these components prevents the PCB from simultaneously contacting the upper and lower pin plates for testing. As a result, automatic feeding of components via the conveyor line is not possible, and testing can only be performed manually. This makes it impossible to automate the testing process and results in low testing efficiency. Utility Model Content

[0003] This invention provides a PCB testing module with automatic feeding capability, aiming to solve at least one of the technical problems existing in the prior art.

[0004] The technical solution of this utility model relates to a PCB testing module with automatic feeding capability, comprising:

[0005] frame;

[0006] The first guide post is disposed below the frame in the vertical direction;

[0007] The first mounting plate is movably connected to the first guide post;

[0008] The upper needle plate assembly is connected to the lower part of the first mounting plate;

[0009] The second guide post is movably connected to the first mounting plate in the vertical direction and the post body passes through the first mounting plate. A limiting ring is provided above the second guide post, and the limiting ring is used to keep the second guide post on the first mounting plate.

[0010] The line assembly is connected below the second guide post;

[0011] A limiting block is located below the line assembly to limit the descent height of the line assembly;

[0012] A drive assembly, mounted on the frame, is used to drive the first mounting plate to move up and down.

[0013] According to some embodiments of the present invention, the upper end of the second guide post is further provided with a spring, the upper end of the spring is connected to the limiting ring, and the mounting plate is provided with a stop block that abuts against the lower end of the spring.

[0014] According to some embodiments of this utility model, both the first guide post and the second guide post are provided with four posts, and each post is distributed at one of the four opposite corners of the mounting plate.

[0015] According to some embodiments of the present invention, the line assembly includes:

[0016] A fixed base is provided below the frame, and the lower end of the second guide post is connected to the fixed base;

[0017] A second mounting plate is disposed on the fixed base in a left-right direction, and at least two second mounting plates are provided;

[0018] The third mounting plate is disposed on the fixed base in the left-right direction and is parallel to the second mounting plate. The third mounting plate corresponds one-to-one with the second mounting plate.

[0019] A pulley block is provided on the opposite sides of the second mounting plate and the third mounting plate;

[0020] A belt is movably mounted on the pulley block in the left-right direction, and the belt is used to transport workpieces.

[0021] According to some embodiments of the present invention, the column of the first guide post passes through the fixed base, and a guide sleeve is provided at the contact position between the first guide post and the fixed base.

[0022] According to some embodiments of the present invention, a guide strip is also included, which is disposed on the second mounting plate and the third mounting plate along the belt direction.

[0023] According to some embodiments of the present invention, the driving component includes:

[0024] A lifting cylinder is located above the frame, and its output end is connected to the first mounting plate;

[0025] The third guide post is disposed on the frame, and the lower end of the third guide post is connected to the first mounting plate.

[0026] According to some embodiments of the present invention, a fourth mounting plate is provided above the third guide post, and a buffer is provided on the fourth mounting plate to reduce the impact force when the first mounting plate descends.

[0027] According to some embodiments of the present invention, the buffer includes a buffer post disposed on the fourth mounting plate and a spring disposed below the buffer post.

[0028] According to some embodiments of this utility model, the buffer includes two buffers, which are distributed on the left and right sides of the lifting cylinder.

[0029] The beneficial effects of this utility model are as follows:

[0030] 1. The first mounting plate is lifted by the drive component, and the upper needle plate assembly is lifted upward. Under the action of the limiting ring of the second guide post, the line assembly is lifted upward synchronously. When the line assembly is flush with the external line assembly, the PCB board to be tested can be input into the line assembly or the PCB board that has been tested in the line assembly can be output outward. During testing, the first mounting plate is driven by the drive component to descend along the first guide post, and the line assembly descends synchronously until the bottom of the line assembly abuts against the limiting block. The line assembly stops descending, and the upper needle plate assembly continues to descend under the drive component until it abuts against the PCB board. It continues to press down until the PCB board falls on the carrier plate and the bottom of it docks with the lower needle plate assembly. The whole process does not require manual loading, and the PCB board will not interfere with other components during the automatic loading and unloading process, so normal testing can be performed, while improving testing efficiency. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram (hidden frame) of the PCB testing equipment according to the first embodiment of this utility model;

[0032] Figure 2 This is a structural schematic diagram of the frame and upper needle plate assembly according to an embodiment of the present utility model;

[0033] Figure 3 This is a structural schematic diagram of the lower needle plate assembly (hidden side plate) according to an embodiment of the present invention;

[0034] Figure 4 This is a structural schematic diagram of the carrier plate and mounting strip in an embodiment of this utility model;

[0035] Figure 5 This is a structural schematic diagram of the PCB testing equipment according to the second embodiment of this utility model (hidden frame);

[0036] Figure 6 This is a schematic diagram of the structure of the line component according to an embodiment of the present utility model.

[0037] Icon labels:

[0038] Machine base 100, machine frame 110, first guide post 120, first mounting plate 130, fixing strip 131, fixing component 132, limit block 140, mounting strip 150, fixing block 160, slide rail 170, mounting bracket 180, top rod 190, guide rod 191;

[0039] Needle plate assembly 200, insert plate 210, first housing 220, needle plate 230;

[0040] The lower needle plate assembly 300, the base plate 310, the mounting block 311, the support plate 312, the slide 3121, the vertical groove 3122, the support bar 313, the knob 3131, the second box 320, the connecting plate 321, the hinge 322, the connecting ring 323, the lower needle plate 330, and the barb 331.

[0041] Carrier plate 400;

[0042] Drive assembly 500, lifting cylinder 510, third guide column 520, fourth mounting plate 530, buffer column 540;

[0043] Line assembly 600, fixing base 610, guide rail 611, guide sleeve 612, second mounting plate 620, guide bar 621, third mounting plate 630, pulley block 640, belt 650, drive component 660, transmission wheel block 670, lead screw 680, second guide post 690, limit ring 691, spring 692. Detailed Implementation

[0044] The following will describe several embodiments of the present invention, including embodiments corresponding to the accompanying drawings. It should be understood that the drawings are used to assist in understanding the technical features and technical solutions of the present invention, and should not be construed as limiting the scope of protection of the present invention.

[0045] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0046] It should be noted that, unless otherwise explicitly defined, when a feature is referred to as "fixed," "connected," "installed," or "set" on another feature, it can be "fixed," "connected," "installed," or "set" directly on the other feature, or it can be "fixed," "connected," "installed," or "set" on the other feature indirectly. The terms "fixed," "connected," "installed," and "set" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0047] It should be noted that the descriptions of orientations or positional relationships indicated by terms such as up, down, left, right, top, bottom, front, back, inside, and outside used in this utility model are based on the orientations or positional relationships indicated by the accompanying drawings or embodiments. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0048] It should be noted that the term "and / or" used in this utility model includes any combination of one or more related listed items, "several" means one or more, "multiple" means at least two, "greater than", "less than", "exceeding" are understood to exclude the number itself, and "above", "below", "within" are understood to include the number itself.

[0049] It should be noted that the use of "first" and "second" in this utility model is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0050] It should be noted that, unless otherwise expressly defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and not for limiting the scope of the invention.

[0051] Reference Figures 1 to 6 The technical solution of this utility model relates to a PCB production line, including a machine base 100; a line assembly 600, the line assembly 600 including: a fixed base 610, disposed on the machine base 100, the fixed base 610 having a guide rail 611 along the front-to-back direction; a second mounting plate 620, disposed on the fixed base 610 along the left-to-right direction, at least two second mounting plates 620; a third mounting plate 630, movably disposed on the guide rail 611 along the left-to-right direction and located behind the second mounting plates 620, the number of third mounting plates 630 and second mounting plates 620 being equal. Correspondingly, in this embodiment, there are two second mounting plates 620 and two third mounting plates 630. The two second mounting plates 620 and the two third mounting plates 630 are respectively connected to belts 650 through pulley groups 640. The pulley groups 640 are arranged on the opposite sides of the second mounting plates 620 and the third mounting plates 630. The belts 650 are movably arranged on the pulley groups 640 in the left and right direction and are used to transport workpieces. The driving component 660 is arranged on the machine base 100 and is used to drive the third mounting plate 630 to move back and forth along the guide rail 611.

[0052] In this embodiment, the driving component 660 is a motor, which is located on the rear side of one of the third mounting plates 630. A lead screw 680 is connected to the output shaft of the motor. A nut for threaded connection of the lead screw 680 is provided on the third mounting plate 630 on this side. A nut is also provided on the third mounting plate 630 on the other side, and a lead screw 680 is threadedly connected to it. The two lead screws 680 are arranged parallel to the guide rail 611 and are connected to each other through a transmission wheel set 670. The motor drives the two third mounting plates 630 to move back and forth simultaneously.

[0053] In some other embodiments, a motor may be provided on the rear side of each third mounting plate 630 to achieve synchronous forward and backward movement of multiple third mounting plates 630.

[0054] The PCB testing module with automatic feeding capability in the testing equipment of this utility model further includes: a frame 110, disposed on a machine base 100; a first guide post 120, disposed below the frame 110 in the vertical direction; a first mounting plate 130, movably connected to the first guide post 120; an upper pin plate assembly 200, connected below the first mounting plate 130 and detachably connected to the first mounting plate 130; a second guide post 690, movably connected to the first mounting plate 130 in the vertical direction and with the post body passing through the first mounting plate 130, a limiting ring 691 provided above the second guide post 690, the limiting ring 691 being used to keep the second guide post 690 on the first mounting plate 130, a fixing seat 610 connected to the lower end of the second guide post 690; a limiting block 140, disposed below the fixing seat 610, being used to limit the descent height of the fixing seat 610; and a driving assembly 500, disposed on the frame 110, being used to drive the first mounting plate 130 to move up and down.

[0055] During the test, the drive assembly 500 drives the first mounting plate 130 upward, which in turn moves the upper needle plate assembly 200 upward. Simultaneously, the first mounting plate 130 abuts against the limiting ring 691 and moves the fixing seat 610 upward in sync until the belt 650 is flush with the external feed line. Then, the workpiece to be tested is fed onto the belt from the external feed line. Once the workpiece reaches the set position, the drive assembly 500 drives the first mounting plate 130 downward, causing the upper needle plate assembly 200 and the fixing seat 610 to move downward together until the fixing seat 610 is secured. After the seat 610 abuts against the limit block 140, the fixed seat 610 stops moving. At this time, the lower end of the workpiece abuts against the carrier plate 400. Under the action of the drive assembly 500, the first mounting plate 130 continues to move downward, that is, the upper needle plate assembly 200 continues to move downward until the upper needle plate 230 abuts against the workpiece. This drives the workpiece and the carrier plate 400 to continue to move downward and squeeze the spring 692 below the push rod 190 until the lower end of the workpiece contacts the lower needle plate 330. Then the test begins. During the process, interference between the workpiece and the test equipment can be avoided when loading.

[0056] According to some embodiments of this utility model, the upper end of the second guide post 690 is also provided with a spring 692, the upper end of the spring 692 is connected to a limiting ring 691, and the mounting plate is provided with a stop block that abuts the lower end of the spring 692. By setting springs 692 of different lengths, the lifting height of the line assembly 600 can be controlled, thereby adapting to external lines of different heights and improving the overall versatility of the testing equipment.

[0057] According to some embodiments of the present invention, the column of the first guide post 120 passes through the fixed seat 610, and a guide sleeve 612 is provided at the contact position between the first guide post 120 and the fixed seat 610. The first guide post 120 also guides the fixed seat 610, ensuring that the up and down movement of the fixed seat 610 is consistent with the upper needle plate assembly 200.

[0058] According to some embodiments of the present invention, a guide bar 621 is also included. The guide bar 621 is disposed on the second mounting plate 620 and the third mounting plate 630 along the belt 650 direction. The guide bar 621 is used to ensure the travel direction of the workpiece on the two belts 650 and to avoid skewing during movement.

[0059] According to some embodiments of this utility model, the drive assembly 500 includes: a lifting cylinder 510, disposed above the frame 110, with its output end connected to the first mounting plate 130; a third guide post 520, disposed on the frame 110, with its lower end connected to the first mounting plate 130; a fourth mounting plate 530 disposed above the third guide post 520; and a buffer member disposed on the fourth mounting plate 530. The buffer member is used to reduce the impact force when the first mounting plate 130 descends. The buffer member includes a buffer post 540 disposed on the fourth mounting plate 530 and a spring 692 disposed below the buffer post 540. During the process of driving the upper needle plate assembly 200 to descend, after the spring 692 contacts the frame 110, it plays a buffering role on the buffer post 540 and the fourth mounting plate 530, thereby making the first mounting plate 130 receive a buffering effect. This makes the force of the upper needle plate assembly 200 when contacting the workpiece more gentle and smooth, avoiding damage to the workpiece.

[0060] The testing equipment of this utility model also involves a quick-change mechanism, wherein the machine base 100 is provided with two mounting strips 150, and further includes: a lower needle plate assembly 300, which is detachably mounted on the machine base 100 and located between the two mounting strips 150; and a carrier plate 400, which is mounted on the machine base 100 and located between the upper needle plate assembly 200 and the lower needle plate assembly 300.

[0061] According to some embodiments of this utility model, two fixing strips 131 are provided below the first mounting plate 130, and two fixing members 132 are detachably provided above it. A gap is formed between the two fixing strips 131 and the first mounting plate 130. The top of the upper needle plate assembly 200 is inserted into the gap and fixed by the fixing members 132. The upper needle plate assembly 200 includes: an insert plate 310, which is movably inserted into the gap; a first housing 220, which is connected to the lower part of the insert plate 310; and an upper needle plate 230, which is located below the first housing 220. The upper needle plate 230 is connected to the insert plate 310 through a connecting post. The first housing 220 is used to store the connecting wire in the upper needle plate 230. The insert plate 310 in the upper needle plate assembly 200 is inserted into the gap in the form of a drawer and fixed by the fixing members 132 to complete the installation of the upper needle plate assembly 200. The operation is simple and easy to replace quickly. The fixing members 132 can be set as pins or bolts.

[0062] According to some embodiments of this utility model, a fixing block 160 is provided on the machine base 100, and a fixing member 132 is detachably provided on the fixing block 160. An mounting block 311 is provided on the lower needle plate assembly 300. The fixing member 132 is used to restrict the mounting block 311 on the fixing block 160, so that the lower needle plate assembly 300 is restricted below the upper needle plate assembly 200. The lower needle plate assembly 300 also adopts the form of a drawer. Unlike the upper needle plate assembly 300, the side of the bottom plate 310 in the lower needle plate assembly 300 is provided with a mounting block 311. The mounting block 311 and the fixing block 160 can be connected by the fixing member 132, thereby restricting the lower needle plate assembly 300 on the machine base 100 so that it cannot move, thus completing the installation and fixing of the lower needle plate assembly 300. The operation is simple and easy to replace quickly. The fixing member 132 can be set as a bolt or a pin.

[0063] According to some embodiments of the present invention, the base plate 310 is movably disposed between two mounting strips 150, the mounting strips 150 being stepped in shape, and the two sides of the base plate 310 being movably disposed on the stepped surfaces of the two mounting strips 150; the second housing 320 is disposed on the base plate 310, and a handle is provided on the side of the second housing 320 to facilitate pulling the lower needle plate assembly 300 outward; the lower needle plate 330 is disposed above the second housing 320, and the second housing 320 is used to store the connecting wires on the lower needle plate 330.

[0064] According to some embodiments of this utility model, the upper end of the second housing 320 is further provided with a connecting plate 321. One side of the lower needle plate 330 is hinged to the connecting plate 321 via a hinge 322. The bottom plate 310 is provided with a support plate 312 and a support bar 313. The support plate 312 is provided with a horizontal sliding groove 3121. One end of the sliding groove 3121 is provided with a vertical groove 3122. One end of the support bar 313 is hinged to the lower end of the bottom plate 310 away from the hinge 322, and the other end is hinged to a knob 3131. The middle section of the knob 3131 is movably disposed in the sliding groove 3121. In 121, the lower needle plate 330 is hinged to the connecting plate 321, allowing the lower needle plate 330 to be opened from above to complete wiring or other maintenance work. When the unhinged side of the lower needle plate 330 is flipped up, the support bar 313 hinges to the side of the lower needle plate 330 and rotates upward. The middle section of the knob 3131 on the other side slides in the slide groove 3121 until it slides to the vertical groove 3122. Then the support bar 313 remains stationary and supports the lower needle plate 330. No additional manual support or support through other structures is required. The structure is simple and easy to operate.

[0065] According to some embodiments of the present invention, the side of the lower needle plate 330 away from the hinge 322 is also provided with a barb 331, and the side of the second housing 320 is provided with a connecting ring 323 for fixing the barb 331. The connecting ring 323 can lock the barb 331, so that the lower needle plate 330 cannot be opened.

[0066] According to the first embodiment of this utility model, a slide rail 170 is provided on the machine base 100, a slider is movably connected to the slide rail 170, and a mounting bracket 180 is provided on the slider. The carrier plate 400 is detachably connected to the mounting bracket 180 via a connecting rod. By dragging the carrier plate 400 outward from the machine base 100, the carrier plate 400 moves away from below the upper needle plate assembly 200 along the slide rail 170, making it convenient to manually place the workpiece to be tested into the carrier plate 400 or to remove the workpiece after testing. At the same time, the fixed part on the connecting rod is removed. The fixed part 132 allows for quick replacement of different sized carrier plates 400 for workpieces of different specifications. The slider is also equipped with a push rod 190, with a spring 692 at the lower end and the upper end abutting against the carrier plate 400. The function of the spring 692 has been described above and will not be repeated here. A guide rod 191 is also provided below the carrier plate 400. The rod body of the guide rod 191 is movably set in the mounting frame 180. The guide rod 191 is used to provide guidance for the carrier plate 400 during its up and down floating process.

[0067] The beneficial effects of this utility model are as follows:

[0068] 1. The third mounting plate 630 is driven to move back and forth on the guide rail 611 by the driving component 660, thereby adjusting the distance between the third mounting plate 630 and the second mounting plate 620, so as to adapt to the placement and loading of PCB boards of different specifications. The same equipment can be used to test multiple PCB boards of different specifications, reducing testing costs and improving testing efficiency.

[0069] 2. The upper needle plate assembly 200 is detachably connected to the first mounting plate 130, and the lower needle plate assembly 300 is detachably mounted on the machine 100. Different specifications of the upper needle plate assembly 200 and lower needle plate assembly 300 can be replaced for different test products, so that different test products can be tested on the same test equipment without the need for an additional test machine 100, thus reducing the cost and footprint of the test equipment.

[0070] 3. The first mounting plate 130 is lifted by the drive assembly 500, and the upper pin plate assembly 200 is lifted upward. Under the action of the limiting ring 691 of the second guide post 690, the line assembly 600 is lifted upward synchronously. When the line assembly 600 is flush with the external line, the PCB board to be tested can be input into the line assembly 600 or the PCB board that has been tested in the line assembly 600 can be output outward. During testing, the first mounting plate 130 is driven to descend along the first guide post 120 by the drive assembly 500, and the line assembly... The assembly 600 descends synchronously until its lower part abuts against the limit block 140. The assembly 600 then stops descending. The upper pin plate assembly 200 continues to descend under the drive of the drive assembly 500 until it abuts against the PCB board. It continues to press down until the PCB board lands on the carrier board 400 and aligns with the lower pin plate assembly 300 below. The entire process requires no manual loading, and the PCB board does not interfere with other components during the automatic loading and unloading process, allowing for normal testing and improving testing efficiency.

[0071] It should be noted that in this specification, terms such as "one embodiment", "some embodiments", "basic embodiment", and "extended embodiment" may be used to describe several embodiments of the present invention, and the specific features, structures, materials or characteristics of the several embodiments may be combined in accordance with the principles and spirit of the present invention.

[0072] Although some embodiments of the present invention have been shown and described in this specification, the present invention should not be limited to the above embodiments. As long as they achieve the technical effects of the present invention by the same or equivalent means, any changes, modifications, equivalent substitutions and equivalent variations of these embodiments within the spirit and principles of this disclosure, without departing from the principles and purpose of the present invention, should be included within the scope of protection of this disclosure and should be considered to fall within the protection scope of the present invention.

Claims

1. A PCB testing module with automatic feeding capability, characterized in that, include: frame; The first guide post is disposed below the frame in the vertical direction; The first mounting plate is movably connected to the first guide post; The upper needle plate assembly is connected to the lower part of the first mounting plate; The second guide post is movably connected to the first mounting plate in the vertical direction and the post body passes through the first mounting plate. A limiting ring is provided above the second guide post, and the limiting ring is used to keep the second guide post on the first mounting plate. The line assembly is connected below the second guide post; A limiting block is located below the line assembly to limit the descent height of the line assembly; A drive assembly, mounted on the frame, is used to drive the first mounting plate to move up and down.

2. The PCB testing module with automatic feeding capability according to claim 1, characterized in that, The upper end of the second guide post is also provided with a spring, the upper end of the spring is connected to the limiting ring, and the mounting plate is provided with a stop block that abuts against the lower end of the spring.

3. The PCB testing module with automatic feeding capability according to claim 2, characterized in that, Both the first guide post and the second guide post have four posts, and each post is located at one of the four opposite corners of the mounting plate.

4. The PCB testing module with automatic feeding capability according to claim 1, characterized in that, The line assembly includes: A fixed base is provided below the frame, and the lower end of the second guide post is connected to the fixed base; A second mounting plate is disposed on the fixed base in a left-right direction, and at least two second mounting plates are provided; The third mounting plate is disposed on the fixed base in the left-right direction and is located behind the second mounting plate. The number of the third mounting plate corresponds one-to-one with the number of the second mounting plate. A pulley block is provided on the opposite sides of the second mounting plate and the third mounting plate; A belt is movably mounted on the pulley block in the left-right direction, and the belt is used to transport workpieces.

5. The PCB testing module with automatic feeding capability according to claim 4, characterized in that, The first guide post is inserted through the fixed base, and a guide sleeve is provided at the contact position between the first guide post and the fixed base.

6. The PCB testing module with automatic feeding capability according to claim 4, characterized in that, It also includes a guide bar, which is disposed on the second mounting plate and the third mounting plate along the belt direction.

7. The PCB testing module with automatic feeding capability according to claim 1, characterized in that, The driving component includes: A lifting cylinder is located above the frame, and its output end is connected to the first mounting plate; The third guide post is disposed on the frame, and the lower end of the third guide post is connected to the first mounting plate.

8. A PCB testing module with automatic feeding capability according to claim 7, characterized in that, A fourth mounting plate is provided above the third guide post, and a buffer is provided on the fourth mounting plate to reduce the impact force when the first mounting plate descends.

9. A PCB testing module with automatic feeding capability according to claim 8, characterized in that, The buffer includes a buffer post disposed on the fourth mounting plate and a spring disposed below the buffer post.

10. A PCB testing module with automatic feeding capability according to claim 8 or 9, characterized in that, The buffer consists of two components, which are distributed on the left and right sides of the lifting cylinder.

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