An adaptive auxiliary circuit board jig

Abstract

The application relates to the technical field of circuit board manufacturing, and discloses a self-adaptive auxiliary circuit board jig, which comprises a machine table, a pair of driving sliding rails are fixedly connected to the upper surface of the machine table, driving sliding blocks are slidably connected to the interiors of the pair of driving sliding rails, and a printing part is fixedly connected to the upper surface of the machine table; a pair of triangular sliding blocks are arranged on the top of the pair of driving sliding blocks and are fixedly connected to the top of the pair of driving sliding blocks, center shafts are rotatably connected to the outer surfaces of the two triangular sliding blocks, a placing plate is fixedly connected between the two center shafts, and balance frames are fixedly connected to the ends, away from each other, of the two center shafts. The self-adaptive auxiliary circuit board jig can effectively solve the problems that, in the prior art, when batch circuit boards are manufactured, the double-side ink printing of each circuit board needs workers to fix the circuit board on a clamp for multiple times, the processing steps are relatively complicated, the labor intensity of the workers is relatively high, and the circuit board production efficiency is relatively low.

Description

Technical Field

[0001] This invention relates to the field of circuit board manufacturing technology, and more specifically to an adaptive auxiliary circuit board fixture. Background Technology

[0002] A circuit board, or printed circuit board, is an indispensable core component of electronic devices. It provides electrical connections and mechanical support for electronic components. In the production process of circuit boards, a screen printing machine is usually used to evenly coat the surface of the circuit board with liquid solder resist ink. The solder resist ink covers the surface of the circuit board and forms an insulating layer to prevent solder from flowing into areas that do not need to be soldered (such as adjacent pads or wires) during the soldering process, thereby avoiding short circuits. Through screen printing technology, the solder resist ink can be precisely coated on non-soldering areas, ensuring that the solder adheres only to the designated pads, improving the accuracy and reliability of soldering.

[0003] Currently, in the process of applying solder resist to both sides of a circuit board, the circuit board is usually fixed on a fixture. The fixture is then controlled to transport the circuit board to the printing position of the screen printing machine for single-sided solder resist ink printing. After single-sided printing is completed, the circuit board is removed from the fixture and flipped over. The flipped circuit board is then fixed back on the fixture for the other side solder resist ink printing. However, when manufacturing circuit boards in batches, the double-sided ink printing of each circuit board requires workers to fix the circuit board on the fixture multiple times. The processing steps are cumbersome, the labor intensity of workers is high, and thus the production efficiency of circuit boards is reduced. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an adaptive auxiliary circuit board fixture, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides an adaptive auxiliary circuit board fixture, comprising:

[0007] The machine base has a pair of drive slide rails fixedly connected to its upper surface, and drive sliders are slidably connected inside each pair of drive slide rails. A printing section is fixedly connected to the upper surface of the machine base.

[0008] Two triangular sliders are provided and fixedly connected to the top of a pair of drive sliders. The outer surfaces of the two triangular sliders are rotatably connected to a central shaft. A placement plate is fixedly connected between the two central shafts. A balance frame is fixedly connected to the ends of the two central shafts that are far apart. Telescopic rods are slidably connected to both ends of the two balance frames. A first adjusting wheel is rotatably connected to the outer circumference of the telescopic rod closer to the printing part, and a second adjusting wheel is rotatably connected to the outer circumference of the telescopic rod farther away from the printing part.

[0009] Furthermore, two sets of support rods are fixedly connected to the upper surface of the machine, and an L-shaped guide rail is fixedly connected to the top of the support rods in the same set. The first and second adjusting wheels are slidably connected inside the L-shaped guide rail. An opening is provided at the bottom of the L-shaped guide rail, and a pressing folding block is fixedly connected to the end of the L-shaped guide rail near the printing part.

[0010] Furthermore, an extension guide is fixedly connected to one end of the L-shaped guide rail near the extrusion block, and a patch is fixedly connected to one side of the extension guide rail. Ball bearings are rotatably connected to the end of the telescopic rod away from the balance frame.

[0011] Furthermore, a side rod is fixedly connected to the outer circumference of the central shaft, and a compression spring is fixedly connected between the end of the side rod away from the central shaft and the telescopic rod.

[0012] Furthermore, a retaining ring is fixedly connected to the outer circumference of the telescopic rod, and the retaining ring is located on the side of the balance frame near the placement plate.

[0013] Furthermore, a square through hole is provided at the center of the placement plate, four corner blocks are fixedly connected to the upper surface of the placement plate, a slot is provided on the upper surface of the placement plate, a rotating block is rotatably connected to the top of the corner block, and a locking block is fixedly connected to the outer circumference of the rotating block.

[0014] Furthermore, the bottom end of the rotating block passes through the corner block and is fixedly connected to a gear, and a fixed frame is fixedly connected to the upper surface of the machine base, with toothed teeth arranged at both ends of the fixed frame.

[0015] The technical solution provided by this invention has the following advantages compared with the prior art:

[0016] This invention utilizes a placement plate. During the ink printing process on the circuit board, the circuit board is fixedly mounted on the placement plate. A triangular slider, via a central shaft, moves the placement plate and the circuit board to the printing position in the printing section, allowing for solder resist ink printing on one side of the circuit board. After one side of the circuit board is printed, the first adjusting wheel is adjusted. This first adjusting wheel, via a telescopic rod and a balance frame, drives the central shaft to rotate around its axis. The central shaft then rotates the placement plate and the circuit board 180 degrees around its axis, completing the first flipping of the circuit board. Solder resist printing then proceeds on the other side of the circuit board. After the solder resist ink printing on the other side of the circuit board is completed, the second adjusting wheel is adjusted. The second adjusting wheel drives the central shaft to rotate around the axis of the central shaft through the telescopic rod and the balance frame. The central shaft drives the placement plate and the circuit board to rotate 180 degrees around the axis of the central shaft, thus completing the second flipping of the circuit board. Finally, the circuit board is removed from the placement plate. When manufacturing circuit boards in batches, double-sided ink printing of the circuit board can be completed by fixing the circuit board to the placement plate in one step. The processing steps are simple and convenient, reducing the labor intensity of workers and thus improving the production efficiency of circuit boards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the tooth row structure in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the placement plate in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the side rod structure in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the slotted structure in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the retaining ring structure in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the L-shaped guide rail in an embodiment of the present invention;

[0025] Figure 8This is a schematic diagram of the extrusion folding block in an embodiment of the present invention.

[0026] The labels in the diagram represent: 1. Machine base; 11. Drive slide rail; 12. Drive slider; 13. Printing section; 2. Triangular slider; 21. Central shaft; 22. Placement plate; 23. Balance frame; 24. Telescopic rod; 25. Adjusting wheel No. 1; 26. Adjusting wheel No. 2; 3. Support rod; 31. L-shaped guide rail; 32. Opening; 33. Extrusion folding block; 341. Extension guide rail; 342. Adhesive block; 343. Ball bearing; 4. Side rod; 41. Compression spring; 411. Retaining ring; 5. Corner block; 51. Slotted; 52. Rotating block; 53. Locking block; 54. Gear; 541. Fixing frame; 542. Gear rack. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] The present invention will be further described below with reference to embodiments. Example

[0029] Please see Figures 1-8 The present invention provides a technical solution: an adaptive auxiliary circuit board fixture, comprising:

[0030] Machine base 1, a pair of drive slide rails 11 are fixedly connected to the upper surface of machine base 1, and drive sliders 12 are slidably connected inside the pair of drive slide rails 11. Printing section 13 is fixedly connected to the upper surface of machine base 1.

[0031] Two triangular sliders 2 are provided and fixedly connected to the top of a pair of drive sliders 12 respectively. The outer surfaces of the two triangular sliders 2 are rotatably connected to a central shaft 21. A placement plate 22 is fixedly connected between the two central shafts 21. A balance frame 23 is fixedly connected to the ends of the two central shafts 21 that are far apart. Telescopic rods 24 are slidably connected to both ends of the two balance frames 23. A first adjusting wheel 25 is rotatably connected to the outer circumference of the telescopic rod 24 closer to the printing section 13, and a second adjusting wheel 26 is rotatably connected to the outer circumference of the telescopic rod 24 farther away from the printing section 13.

[0032] Two sets of support rods 3 are fixedly connected to the upper surface of the machine base 1. The top of the support rods 3 are fixedly connected to an L-shaped guide rail 31. The first adjusting wheel 25 and the second adjusting wheel 26 are slidably connected inside the L-shaped guide rail 31. An opening 32 is provided at the bottom of the L-shaped guide rail 31. An extrusion folding block 33 is fixedly connected to the end of the L-shaped guide rail 31 near the printing section 13.

[0033] An extension guide 341 is fixedly connected to one end of the L-shaped guide rail 31 near the compression folding block 33. A patch block 342 is fixedly connected to one side of the extension guide rail 341. A ball bearing 343 is rotatably connected to one end of the telescopic rod 24 away from the balance frame 23.

[0034] A side rod 4 is fixedly connected to the outer circumference of the central shaft 21, and a compression spring 41 is fixedly connected between the end of the side rod 4 away from the central shaft 21 and the telescopic rod 24.

[0035] A retaining ring 411 is fixedly connected to the outer circumference of the telescopic rod 24. The retaining ring 411 is located on the side of the balance frame 23 near the placement plate 22.

[0036] A square through hole is provided in the center of the placement plate 22. Four corner blocks 5 are fixedly connected to the upper surface of the placement plate 22. A slot 51 is provided in the upper surface of the placement plate 22. A rotating block 52 is rotatably connected to the top of the corner block 5. A locking block 53 is fixedly connected to the outer circumference of the rotating block 52.

[0037] The bottom end of the rotating block 52 passes through the corner block 5 and is fixedly connected to the gear 54. The upper surface of the machine base 1 is fixedly connected to the fixed frame 541, and both ends of the fixed frame 541 are provided with toothed tooth rows 542.

[0038] Working principle:

[0039] Place the circuit board:

[0040] In practical applications, by controlling the drive slide rail 11, the drive slide rail 11 drives a pair of drive sliders 12 to move along the drive slide rail 11 to the end of the drive slide rail 11 away from the printing section 13. At this time, the second adjusting wheel 26 and the first adjusting wheel 25 are both located inside the L-shaped guide rail 31, and the second adjusting wheel 26 is located at the end of the L-shaped guide rail 31 away from the printing section 13. Under the joint limiting effect of the L-shaped guide rail 31 on the first adjusting wheel 25 and the second adjusting wheel 26, the central shaft 21 is limited (the central shaft 21 cannot rotate around its own axis). The placement plate 22 is arranged in a horizontal state, and the circuit board is placed on the placement plate 22. By setting two slots 51, it is easy to place the circuit board between the four corner blocks 5. The circuit board is initially fixed. By controlling the drive slide rail 11, the drive slide rail 11 drives a pair of drive sliders 12 to move towards the printing section 13. The pair of drive sliders 12 drive two triangular sliders 2 to move along the drive slide rail 11 towards the printing section 13. The two triangular sliders 2 drive two central shafts 21 on their outer surfaces to move towards the printing section 13. The two central shafts 21 drive the first adjusting wheel 25 and the second adjusting wheel 26 to slide along the L-shaped guide rail 31 through the balance frame 23 and the telescopic rod 24. Under the joint limiting action of the L-shaped guide rail 31 on the first adjusting wheel 25 and the second adjusting wheel 26, the central shaft 21 is limited (the central shaft 21 cannot rotate around its own axis). The central shaft 21 drives the horizontally arranged placement plate 22 to move towards the printing section 13.

[0041] Fixed circuit board:

[0042] In practical applications, as the placement plate 22 drives the four rotating blocks 52 to move toward the printing section 13, the four rotating blocks 52 drive the four gears 54 to move toward the printing section 13. The two gears 54 closer to the printing section 13 first mesh with the toothed rack 542, and the two gears 54 farther away from the printing section 13 then mesh with the toothed rack 542. During the meshing process of the gears 54 and the toothed rack 542, under the meshing action of the gears 54 and the toothed rack 542, the gears 54 drive the rotating blocks 52 to rotate around their own axis. The rotating blocks 52 drive the locking blocks 53 on their outer circumference to rotate 180 degrees around the axis of the rotating blocks 52. After all four locking blocks 53 have rotated 180 degrees around the rotating blocks 52, the four locking blocks 53 are located above the circuit board. The four locking blocks 53 and the four corner blocks 5 together limit the circuit board, thereby performing the second step of fixing the circuit board (the circuit board is fixedly installed on the placement plate 22).

[0043] Printing process on one side of the circuit board:

[0044] In practical applications, the triangular slider 2 continues to drive the central shaft 21, the placement plate 22, and the circuit board towards the printing section 13. The central shaft 21, through the balance frame 23 and the telescopic rod 24, drives the first adjusting wheel 25 and the second adjusting wheel 26 to move along the L-shaped guide rail 31 towards the printing section 13. When the first adjusting wheel 25 moves above the opening 32, the second adjusting wheel 26 remains inside the L-shaped guide rail 31. Under the limiting effect of the L-shaped guide rail 31 on the second adjusting wheel 26, the central shaft 21 is still limited (the central shaft 21 cannot rotate around its own axis). The central shaft 21 continues to drive the first adjusting wheel 25 and the second adjusting wheel 26 along the L-shaped guide rail 31 towards the printing section 13 through the balance frame 23 and the telescopic rod 24. Figure 7 As shown, the central shaft 21 drives the placement plate 22 and the circuit board to the printing position of the printing section 13. Under the combined limiting action of the L-shaped guide rail 31 on the first adjusting wheel 25 and the second adjusting wheel 26, the central shaft 21 is limited (the central shaft 21 cannot rotate around its own axis), and the placement plate 22 and the circuit board are arranged in a horizontal state.

[0045] As a further embodiment of the present invention, by controlling the printing unit 13, the printing unit 13 uniformly coats the solder resist ink on the surface of the circuit board. The solder resist ink covers the surface of the circuit board to form an insulating layer, preventing solder from flowing to areas that do not need to be soldered (such as adjacent pads or wires) during the soldering process, thereby avoiding short circuits. In addition, the solder resist ink can isolate air, moisture and chemicals, protect the copper foil and wires on the surface of the circuit board from oxidation and corrosion, and extend the service life of the circuit board.

[0046] The process of flipping the circuit board:

[0047] In practical applications, after the single-sided solder resist ink printing on the circuit board is completed, the drive slider 12 moves the triangular slider 2 and the central shaft 21 towards the extension guide rail 341. The central shaft 21, through the balance frame 23 and the telescopic rod 24, drives the first adjusting wheel 25 and the second adjusting wheel 26 to move along the L-shaped guide rail 31. When the first adjusting wheel 25 moves to the right-angle end of the L-shaped guide rail 31, the second adjusting wheel 26 is located above the opening 32, releasing the rotation limit of the L-shaped guide rail 31 on the central shaft 21. The triangular slider 2 continues to drive the central shaft 21 to move towards the extension guide rail 341. At the same time, the L-shaped guide rail 31 pushes the first adjusting wheel 25 to rotate upward around the axis of the central shaft 21 through its vertical section. The first adjusting wheel 25, through the telescopic rod 24 and the balance frame 23, drives the central shaft 21 to rotate around the axis of the central shaft 21. Simultaneously, the rotating balance frame 23, through the telescopic rod 24, drives the second adjusting wheel 26 through the opening 341. 2. After separating from the L-shaped guide rail 31, the first adjusting wheel 25 drives the central shaft 21 to rotate 90 degrees around the axis of the central shaft 21. Then, the triangular slider 2 continues to drive the central shaft 21 to move towards the extension guide rail 341. At this time, the L-shaped guide rail 31 pulls the first adjusting wheel 25 to rotate downward around the axis of the central shaft 21 through its vertical section. Similarly, the first adjusting wheel 25 continues to drive the central shaft 21 to rotate around the axis of the central shaft 21. After the first adjusting wheel 25 drives the central shaft 21 to rotate 90 degrees around the axis of the central shaft 21 again, the first adjusting wheel 25 is located at the right angle end of the L-shaped guide rail 31, and the second adjusting wheel 26 is located on the straight line along the length direction of the extension guide rail 341. Because the central shaft 21 rotates 90 degrees around its own axis twice, the two central shafts 21 drive the placement plate 22 and the circuit board to rotate a total of 180 degrees around the axis of the central shaft 21, completing the flipping of the circuit board.

[0048] Printing process on the other side of the circuit board:

[0049] In practical applications, by controlling the drive slider 12, the triangular slider 2 and the central shaft 21 are moved closer to the operation panel of the machine 1. The central shaft 21 drives the first adjusting wheel 25 to move along the L-shaped guide rail 31 through the balance frame 23 and the telescopic rod 24. Under the limiting effect of the L-shaped guide rail 31 on the first adjusting wheel 25, the central shaft 21 drives the second adjusting wheel 26 to slide and connect with the extension guide rail 341 through the balance frame 23 and the telescopic rod 24. Furthermore, the extrusion block 33 extrudes the two telescopic rods 24 connected to the second adjusting wheel 26 through the ball bearings 343, causing the two telescopic rods 24 to drive the two second adjusting wheels 26 to move towards the side rod 4. At the same time, under the limiting effect of the extension guide rail 341 and the sticking block 342, the second adjusting wheel 26 can never rotate around the central shaft 21. After the ball bearings 343 separate from the extrusion block 33, the ball bearings 343 continue to be controlled by the extension guide rail. After the "brief squeeze" of 341, the ball bearing 343 separates from the extension guide rail 341. Under the elastic action of the compression spring 41, the compression spring 41 pushes the two second adjusting wheels 26 into the L-shaped guide rail 31 through the telescopic rod 24, so that the two second adjusting wheels 26 slide and connect with the L-shaped guide rail 31 again. Since a retaining ring 411 is provided, it prevents the second adjusting wheel 26 from moving excessively, thereby ensuring the stability of the sliding connection between the second adjusting wheel 26 and the L-shaped guide rail 31. The triangular slider 2 continues to drive the central shaft 21, the placement plate 22 and the flipped circuit board to the printing position of the printing section 13. Under the joint limiting action of the L-shaped guide rail 31 on the first adjusting wheel 25 and the second adjusting wheel 26, the central shaft 21 is limited (the central shaft 21 cannot rotate around its own axis). The placement plate 22 and the circuit board are arranged in a horizontal state.

[0050] As a further embodiment of the present invention, by controlling the printing unit 13, the printing unit 13 uniformly coats the solder resist ink on the surface of the circuit board. The solder resist ink covers the surface of the circuit board to form an insulating layer, preventing solder from flowing to areas that do not need to be soldered (such as adjacent pads or wires) during the soldering process, thereby avoiding short circuits. In addition, the solder resist ink can isolate air, moisture and chemicals, protect the copper foil and wires on the surface of the circuit board from oxidation and corrosion, and extend the service life of the circuit board.

[0051] Circuit board cutting process:

[0052] In practical applications, after the double-sided solder resist ink printing of the circuit board is completed, the drive slider 12 is controlled to move the triangular slider 2 and the central shaft 21 a certain distance away from the operation panel of the machine 1. Then, the drive slider 12 is controlled to move the triangular slider 2 and the central shaft 21 a certain distance closer to the operation panel of the machine 1. In summary, the placement plate 22 and the circuit board can be flipped again. Then, the placement plate 22 and the circuit board after being flipped twice are controlled to move closer to the operation panel of the machine 1. During the movement, the toothed row 542 can mesh with the gear 54. The four gears 54 drive the four rotating blocks 52 and the four locking blocks 53 to rotate 180 degrees around the axis of the rotating block 52, thereby releasing the four locking blocks 53 from limiting the circuit board, making it easier to remove the circuit board from the placement plate 22.

[0053] By setting up the placement plate 22, during the ink printing process of the circuit board, the circuit board is fixedly installed on the placement plate 22. The triangular slider 2 drives the placement plate 22 and the circuit board to the printing position of the printing section 13 via the central shaft 21, so that the solder resist ink printing work can be carried out on one side of the circuit board. After the solder resist ink printing work on one side of the circuit board is completed, the first adjusting wheel 25 is adjusted. The first adjusting wheel 25 drives the central shaft 21 to rotate around the axis of the central shaft 21 via the telescopic rod 24 and the balance frame 23. The central shaft 21 drives the placement plate 22 and the circuit board to rotate 180 degrees around the axis of the central shaft 21, thus completing the first flipping work of the circuit board, and then the other side of the circuit board is printed. After the solder resist ink printing on the other side of the circuit board is completed, the second adjusting wheel 26 is adjusted. The second adjusting wheel 26 drives the central shaft 21 to rotate around the axis of the central shaft 21 through the telescopic rod 24 and the balance frame 23. The central shaft 21 drives the placement plate 22 and the circuit board to rotate 180 degrees around the axis of the central shaft 21, thus completing the second flipping of the circuit board. Finally, the circuit board on the placement plate 22 is removed. When manufacturing a batch of circuit boards, the double-sided ink printing of the circuit board can be completed by fixing the circuit board on the placement plate 22 in one go. The processing steps are simple and convenient, reducing the labor intensity of workers and thus improving the production efficiency of circuit boards.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adaptive auxiliary circuit board fixture, characterized in that, include: A machine base (1) is fixedly connected to a pair of drive slide rails (11) on its upper surface. A drive slider (12) is slidably connected inside each of the drive slide rails (11). A printing part (13) is fixedly connected to the upper surface of the machine base (1). Two triangular sliders (2) are provided and fixedly connected to the top of a pair of drive sliders (12). The outer surfaces of the two triangular sliders (2) are rotatably connected to a central shaft (21). A placement plate (22) is fixedly connected between the two central shafts (21). A balance frame (23) is fixedly connected to the ends of the two central shafts (21) that are far apart. Telescopic rods (24) are slidably connected to both ends of the two balance frames (23). A first adjusting wheel (25) is rotatably connected to the outer circumference of the telescopic rod (24) close to the printing part (13), and a second adjusting wheel (26) is rotatably connected to the outer circumference of the telescopic rod (24) away from the printing part (13). Two sets of support rods (3) are fixedly connected to the upper surface of the machine base (1). The top of the support rods (3) in the same set are fixedly connected to an L-shaped guide rail (31). The first adjusting wheel (25) and the second adjusting wheel (26) are slidably connected inside the L-shaped guide rail (31). An opening (32) is provided at the bottom of the L-shaped guide rail (31). An extrusion folding block (33) is fixedly connected to one end of the L-shaped guide rail (31) near the printing part (13). An extension guide (341) is fixedly connected to one end of the L-shaped guide rail (31) near the compression fold (33), and a patch (342) is fixedly connected to one side of the extension guide rail (341). A ball bearing (343) is rotatably connected to one end of the telescopic rod (24) away from the balance frame (23).

2. The adaptive auxiliary circuit board fixture according to claim 1, characterized in that: A side rod (4) is fixedly connected to the outer circumference of the central shaft (21), and a compression spring (41) is fixedly connected between the end of the side rod (4) away from the central shaft (21) and the telescopic rod (24).

3. The adaptive auxiliary circuit board fixture according to claim 1, characterized in that: A retaining ring (411) is fixedly connected to the outer circumference of the telescopic rod (24), and the retaining ring (411) is located on the side of the balance frame (23) near the placement plate (22).

4. The adaptive auxiliary circuit board fixture according to claim 1, characterized in that: A square through hole is provided at the center of the placement plate (22). Four corner blocks (5) are fixedly connected to the upper surface of the placement plate (22). A slot (51) is provided on the upper surface of the placement plate (22). A rotating block (52) is rotatably connected to the top of the corner block (5). A locking block (53) is fixedly connected to the outer circumference of the rotating block (52).

5. The adaptive auxiliary circuit board fixture according to claim 4, characterized in that: The bottom end of the rotating block (52) passes through the corner block (5) and is fixedly connected to a gear (54). The upper surface of the machine base (1) is fixedly connected to a fixed frame (541), and both ends of the fixed frame (541) are provided with toothed tooth rows (542).

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