Tool for drilling circuit board

Abstract

The utility model provides a tool for drilling processing of a circuit board, which relates to the field of circuit board drilling tools and comprises a base, a fixing block is fixedly connected to the front side of the upper end face of the base, a [-shaped fixing frame is fixedly connected to the front end face of the fixing block, and limiting mechanisms are uniformly arranged on the inner side of the [-shaped fixing frame. A positioning mechanism is installed on the rear side of the upper portion of the [-shaped fixing frame, and a nut locking mechanism is arranged on the top of the positioning mechanism. A locking gear can be limited through a nut locking mechanism, the situation that a rotating nut and a locking screw are loosened due to stress is avoided, the fixing effect on the circuit board is improved, and the drilling quality of the circuit board is prevented from being affected; the problems that although a tool jig for circuit board drilling disclosed in the prior art can limit the position of a limiting mechanism through a positioning mechanism, a locking screw in the positioning mechanism is prone to loosening due to drilling vibration force, the fixing effect on a circuit board is reduced, and the drilling quality of the circuit board is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board drilling tooling technology, and in particular to tooling for circuit board drilling. Background Technology

[0002] With the rapid development of electronic technology, printed circuit boards (PCBs), as core components of electronic devices, face increasingly higher requirements for manufacturing precision and efficiency. In the PCB manufacturing process, drilling is a critical step affecting board quality, and its processing precision directly impacts the reliability of subsequent component installation and circuit connections. Tooling fixtures are required during the PCB drilling process.

[0003] For example, patent application number CN202420861912.7 discloses a tooling fixture for drilling circuit boards, including a fixture base, a chip removal groove, a support plate, and a bidirectional adjusting screw. The chip removal groove is located on the inner side of the fixture base, and the support plate is slidably connected inside the chip removal groove. A bidirectional adjusting screw is spirally connected to the middle position inside the support plate. A fixed frame with adjustable position and locking function is slidably connected to the upper end of one side of the fixture base. A limit mechanism is slidably connected inside the fixed frame, and a positioning mechanism is installed on the outer side of the middle position of the limit mechanism. The positioning mechanism includes a positioning plate, with guide posts welded and fixed to both sides of the upper end of the positioning plate. In this utility model, during actual operation, circuit boards with different edge shapes can be positioned, such as circuit boards with arc-shaped or semi-circular edges, circuit boards with straight edges, and circuit boards with irregularly shaped edges, ensuring the stability of circuit boards with different edge shapes during the drilling process.

[0004] The tooling fixture for drilling circuit boards disclosed in the aforementioned patent can position circuit boards with different edge shapes during use, and the position of the limiting mechanism can be limited by the positioning mechanism. However, the locking screw in the positioning mechanism is prone to loosening under stress (such as the vibration force generated by the circuit board during drilling), which causes the limiting mechanism to move during the drilling process. This reduces the fixing effect on the circuit board and leads to quality defects such as drilling diameter deviation and poor hole position accuracy, making it difficult to meet the process requirements of modern high-precision circuit board manufacturing. Utility Model Content

[0005] This utility model relates to a tooling for drilling circuit boards, which solves the problem that although the existing tooling for drilling circuit boards can limit the position of the limiting mechanism through the positioning mechanism, the locking screw in the positioning mechanism is easily loosened by the drilling vibration, thus reducing the fixing effect on the circuit board and affecting the quality of the circuit board during the drilling process.

[0006] In a first aspect, this utility model provides a tooling for drilling circuit boards, specifically comprising: a base, wherein a chip removal groove is provided on the base, and two support plates are slidably connected inside the chip removal groove; a bidirectional adjusting screw is rotatably connected to the base, the bidirectional adjusting screw has two reverse threads on its exterior, and the bidirectional adjusting screw is threadedly connected to the two support plates through the two reverse threads; a screw locking assembly is provided at the left end of the bidirectional adjusting screw; a fixing block is fixedly connected to the front side of the upper end face of the base, and a U-shaped fixing frame is fixedly connected to the front end face of the fixing block, a limit mechanism is uniformly arranged on the inner side of the U-shaped fixing frame, and a positioning mechanism is installed on the upper rear side of the U-shaped fixing frame, and a nut locking mechanism is provided at the top of the positioning mechanism.

[0007] Furthermore, a fixing clamp is fixedly connected to the rear side of the upper end face of the base, and a lower clamp is fixedly connected to the lower rear end of the interior of the U-shaped fixing frame.

[0008] Furthermore, the screw locking assembly includes a circular fixing plate and an annular fixing plate. The circular fixing plate is fixedly connected to the left end of the bidirectional adjusting screw, and a sliding rod is slidably connected to the circular fixing plate. A rotating handwheel and an annular top tightening plate are fixedly connected to the left and right ends of the sliding rod, respectively. A spring is sleeved on the outside of each sliding rod between the circular fixing plate and the annular top tightening plate. The annular fixing plate is fixedly connected to the left end face of the base, and locking plates are fixedly connected to the left end face of the annular fixing plate in an annular array. Two limiting plates are fixedly connected to the upper side of the right end face of the annular top tightening plate.

[0009] Furthermore, when the screw locking assembly is in the locking and limiting state, the two limiting plates are located on the front and rear sides of the upper locking plate, respectively.

[0010] Furthermore, the limiting mechanism includes a square slide rod, which is fixedly connected inside the U-shaped fixing frame. A square slide cylinder is slidably connected to the outside of the square slide rod. A spring is installed inside the square slide cylinder at the rear end of the square slide rod. A rectangular connecting plate is fixedly connected to the rear end of the square slide cylinder, and a rubber head is fixedly connected to the rear end face of the rectangular connecting plate. A strip-shaped slide groove is formed on the upper end face of the square slide cylinder, and a limiting slider fixed to the upper end face of the square slide rod is slidably connected inside the strip-shaped slide groove. The bottom end faces of the rectangular connecting plate and the rubber head are flush with the upper end face of the support plate.

[0011] Furthermore, the positioning mechanism includes a rectangular fixing plate, with guide posts fixedly connected to both the left and right sides of the bottom end face of the rectangular fixing plate. The guide posts are fixedly connected to the rear side of the upper end face of the U-shaped fixing frame. A movable plate is slidably connected to the outside of the guide posts, and a rubber pad is glued to the bottom end face of the movable plate with adhesive. A locking screw that penetrates the rectangular fixing plate is fixedly connected to the middle of the upper end face of the movable plate, and a rotating nut that rotates on the top end face of the rectangular fixing plate is threadedly connected to the outside of the locking screw. A locking gear is fixedly connected to the outside of the rotating nut, and a cylinder is fixedly connected to the upper end face of the locking gear. A handwheel is fixedly installed on the upper side of the outside of the cylinder.

[0012] Furthermore, the nut locking mechanism includes a rectangular sliding shell, which is fixedly mounted on the upper surface of a rectangular fixed plate. A rectangular slider is slidably connected inside the rectangular sliding shell. A clamping block penetrating the left side wall of the rectangular sliding shell is fixedly connected to the left end face of the rectangular slider, and a locking limit plate is fixedly connected to the left end face of the clamping block. A pulling rod penetrating the right side wall of the rectangular sliding shell is fixedly connected to the right end face of the rectangular slider, and a pinching plate is fixedly connected to the right end of the pulling rod. A spring is sleeved on the outside of the pulling rod inside the rectangular sliding shell. An L-shaped auxiliary plate is fixedly connected to the lower part of the right end face of the rectangular sliding shell.

[0013] Furthermore, when the nut locking mechanism is in the locking limit state, the locking limit plate is located between two of the teeth on the locking gear.

[0014] This utility model provides a tooling for drilling holes in circuit boards, which has the following advantages:

[0015] By cooperating with the locking gear and nut locking mechanism, the square slide cylinder is limited, and the rubber head is positioned. Then, the pinch plate is released, and the rectangular slider moves to the left with the top block and locking limit plate under the action of the spring force outside the pull rod. This positions the locking limit plate between two teeth on the locking gear, limiting the locking gear and preventing the rotating nut and locking screw from loosening due to force. This also prevents the limiting mechanism from moving during the drilling process of the circuit board, ensuring the stability of the limiting mechanism during processing, improving the fixing effect on the circuit board, and avoiding quality defects such as drilling diameter deviation and poor hole position accuracy. In this way, it can meet the process requirements of modern high-precision circuit board manufacturing.

[0016] By setting up the screw locking assembly, after adjusting the distance between the two support plates, the handwheel can be loosened. At this time, the annular top clamping plate moves to the right under the action of the spring force outside the sliding rod, so that the two limit plates are respectively located on the front and rear sides of the upper locking plate, thereby locking and limiting the circular fixing plate and the bidirectional adjusting screw. This eliminates the risk of the bidirectional adjusting screw loosening due to vibration during the drilling of the circuit board, and significantly improves the stability of the two support plates when supporting the circuit board. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the accompanying drawings will be briefly described below.

[0018] In the attached diagram:

[0019] Figure 1 A structural schematic diagram of the overall structure of this application is shown;

[0020] Figure 2 A structural schematic diagram of this application is shown from the bottom view;

[0021] Figure 3 This application shows Figure 1 A magnified structural diagram of part A in the middle;

[0022] Figure 4 This diagram illustrates the overall structure of this application in its disassembled state.

[0023] Figure 5 This paper shows a schematic diagram of the screw locking assembly in its disassembled state.

[0024] Figure 6 A schematic diagram of the limiting mechanism of this application is shown;

[0025] Figure 7 A schematic diagram of the limiting mechanism, positioning mechanism, and nut locking mechanism of this application is shown;

[0026] Figure 8 This paper shows a schematic diagram of the disassembled rotating nut, cylinder, and rotating handwheel of this application.

[0027] Figure 9 A schematic diagram of the locking gear and nut locking mechanism of this application is shown.

[0028] List of reference numerals

[0029] 1. Base; 101. Chip removal groove; 102. Support plate; 103. Two-way adjusting screw; 104. Fixing clamp; 105. Fixing block; 106. U-shaped fixing frame; 107. Lower clamp;

[0030] 2. Screw locking assembly; 201. Circular fixing plate; 202. Sliding rod; 203. Rotating handwheel; 204. Annular top tightening plate; 205. Annular fixing plate; 206. Locking plate; 207. Limiting plate;

[0031] 3. Limiting mechanism; 301. Square slide bar; 302. Square slide cylinder; 303. Rectangular connecting plate; 304. Rubber head; 305. Strip groove; 306. Limiting slider;

[0032] 4. Positioning mechanism; 401. Rectangular fixing plate; 402. Guide column; 403. Moving plate; 404. Rubber pad; 405. Locking screw; 406. Rotating nut; 407. Locking gear; 408. Cylinder; 409. Handwheel;

[0033] 5. Nut locking mechanism; 501. Rectangular sliding shell; 502. Rectangular slider; 503. Tightening block; 504. Locking limit plate; 505. Pull rod; 506. Kneading plate; 507. L-shaped auxiliary plate. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model 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 this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] Example 1: Please refer to Figures 1 to 9 :

[0036] This utility model proposes a tooling for drilling circuit boards, comprising: a base 1, on which a chip removal groove 101 is formed, and two support plates 102 are slidably connected inside the chip removal groove 101; a bidirectional adjusting screw 103 is rotatably connected to the base 1, the bidirectional adjusting screw 103 has two reverse threads on its exterior, and the bidirectional adjusting screw 103 is threadedly connected to the two support plates 102 through the two reverse threads; a screw locking assembly 2 is provided at the left end of the bidirectional adjusting screw 103; and a fixing block 105 is fixedly connected to the front side of the upper end face of the base 1. Furthermore, a U-shaped fixing bracket 106 is fixedly connected to the front end of the fixing block 105. The inner side of the U-shaped fixing bracket 106 is uniformly provided with a limiting mechanism 3, and a positioning mechanism 4 is installed on the upper rear side of the U-shaped fixing bracket 106. A nut locking mechanism 5 is provided on the top of the positioning mechanism 4. The nut locking mechanism 5 is used to lock and limit the locking gear 407, the rotating nut 406 and the locking screw 405, to prevent the limiting mechanism 3 from moving during the drilling process of the circuit board, and to ensure the stability of the limiting mechanism 3 during the processing.

[0037] A fixing plate 104 is fixedly connected to the rear side of the upper end face of the base 1, and a lower clamping plate 107 is fixedly connected to the lower rear side of the inside of the U-shaped fixing frame 106, which is used to cooperate with the positioning mechanism 4 to realize the positioning of the limiting mechanism 3.

[0038] The limiting mechanism 3 includes a square slide rod 301, which is fixedly connected inside the U-shaped fixing frame 106. A square slide cylinder 302 is slidably connected to the outside of the square slide rod 301. A spring is installed inside the square slide cylinder 302 at the rear end of the square slide rod 301. A rectangular connecting plate 303 is fixedly connected to the rear end of the square slide cylinder 302, and a rubber head 304 is fixedly connected to the rear end face of the rectangular connecting plate 303. A strip-shaped slide groove 305 is opened on the upper end face of the square slide cylinder 302. A limiting slider 306 fixed to the upper end face of the square slide rod 301 is slidably connected inside the strip-shaped slide groove 305. The bottom end faces of the rectangular connecting plate 303 and the rubber head 304 are flush with the upper end face of the support plate 102. Through the cooperation of the limiting mechanism 3 and the fixing clamp 104, circuit boards with different edge shapes can be positioned.

[0039] The positioning mechanism 4 includes a rectangular fixed plate 401. Guide posts 402 are fixedly connected to both the left and right sides of the bottom end face of the rectangular fixed plate 401. The guide posts 402 are fixedly connected to the rear side of the upper end face of the U-shaped fixing frame 106. A movable plate 403 is slidably connected to the outside of the guide posts 402. A rubber pad 404 is glued to the bottom end face of the movable plate 403 with adhesive. A locking screw 405 is fixedly connected to the middle of the upper end face of the movable plate 403, penetrating the rectangular fixed plate 401. 05 is externally connected by a threaded nut 406 that rotates on the top surface of the rectangular fixed plate 401. A locking gear 407 is fixedly connected to the outside of the nut 406, and a cylinder 408 is fixedly connected to the upper surface of the locking gear 407. A handwheel 409 is fixedly installed on the upper side of the cylinder 408. Through the cooperation of the positioning mechanism 4 and the lower clamping plate 107, the square sliding cylinder 302 can be clamped and fixed, thereby achieving the positioning function of the rectangular connecting plate 303 and the rubber head 304.

[0040] The nut locking mechanism 5 includes a rectangular sliding shell 501, which is fixedly mounted on the upper surface of a rectangular fixed plate 401. A rectangular slider 502 is slidably connected inside the rectangular sliding shell 501. A pressing block 503, penetrating the left side wall of the rectangular sliding shell 501, is fixedly connected to the left end face of the pressing block 503, and a locking limit plate 504 is fixedly connected to the left end face of the pressing block 503. A pulling rod 505, penetrating the right side wall of the rectangular sliding shell 501, is fixedly connected to the right end of the pulling rod 505, and a pinching plate 506 is fixedly connected to the right end of the pulling rod 505. A spring is fitted inside the rectangular sliding shell 501. An L-shaped auxiliary plate 507 is fixedly connected to the lower right end face of the rectangular sliding shell 501. When the nut locking mechanism 5 is in the locking limit state, the locking limit plate 504 is located between two teeth on the locking gear 407, thereby limiting the locking gear 407 and preventing the rotating nut 406 and locking screw 405 from loosening due to force. This prevents the limiting mechanism 3 from moving during the drilling process of the circuit board, ensuring the stability of the limiting mechanism 3 during the processing and improving the fixing effect on the circuit board.

[0041] Example 2, based on Example 1, such as Figure 1 , Figure 3 and Figure 5 As shown, the screw locking assembly 2 includes a circular fixing plate 201 and an annular fixing plate 205. The circular fixing plate 201 is fixedly connected to the left end of the bidirectional adjusting screw 103, and a sliding rod 202 is slidably connected to the circular fixing plate 201. A rotating handwheel 203 and an annular top tightening plate 204 are fixedly connected to the left and right ends of the sliding rod 202, respectively. A spring is sleeved on the outside of each sliding rod 202 between the circular fixing plate 201 and the annular top tightening plate 204. The annular fixing plate 205 is fixedly connected to the left end face of the base 1. A locking plate 206 is fixedly connected in a ring array on the left end face, and two limiting plates 207 are fixedly connected on the upper side of the right end face of the ring top tightening plate 204. When the screw locking assembly 2 is in the locking and limiting state, the two limiting plates 207 are located on the front and rear sides of the upper locking plate 206 respectively, thereby locking and limiting the circular fixing plate 201 and the bidirectional adjusting screw 103, eliminating the risk of the bidirectional adjusting screw 103 loosening due to vibration during the drilling of the circuit board, and improving the stability of the two support plates 102 when supporting the circuit board.

[0042] The working principle of this embodiment is as follows: When drilling holes in the circuit board, the operator first adjusts the distance between the two support plates 102 according to the width of the circuit board. During adjustment, the handwheel 203 is pulled to the left, causing the sliding rod 202, the annular top clamping plate 204, and the limiting plate 207 to move to the left. At this time, the two limiting plates 207 separate from the upper locking plate 206. Then, the handwheel 203 is rotated, causing the bidirectional adjusting screw 103 to rotate. At this time, the two support plates 102 move simultaneously in opposite directions or away from each other under the action of the two reverse threads on the outside of the bidirectional adjusting screw 103. Move the direction to complete the adjustment of the distance between the two support plates 102. After the adjustment is completed, loosen the rotating handwheel 203. At this time, the annular top clamping plate 204 moves to the right with the two limiting plates 207 under the action of the spring force outside the sliding rod 202, so that the two limiting plates 207 are respectively located on the front and rear sides of the upper locking plate 206, thereby locking and limiting the circular fixing plate 201 and the bidirectional adjusting screw 103, preventing the bidirectional adjusting screw 103 from loosening due to vibration during the drilling of the circuit board, and improving the reliability of the two support plates 102 when supporting the circuit board.

[0043] Then, the circuit board is placed on top of the two support plates 102. At this time, the front side of the circuit board is in close contact with the rear end of the rubber head 304, and the rear side of the circuit board is in close contact with the front end of the fixing clamp 104, thus clamping and limiting the circuit board. Then, the operator squeezes the pinch plate 506 to the right of the L-shaped auxiliary plate 507 with one hand. At this time, the pinch plate 506 moves the pull rod 505, the rectangular slider 502, the top block 503 and the locking limit plate 504 to the right, so that the locking limit plate 504 separates from two of the teeth on the locking gear 407. Then, the handwheel 409 is turned, which rotates the cylinder 408, the locking gear 407 and the rotating nut 406. Then, the locking screw 405 moves the moving plate 403 and the rubber pad 404 downward under the action of the thread, so that the bottom end of the rubber pad 404 is in close contact with the upper side of the square slider 302, thus clamping and limiting the circuit board. The square slide cylinder 302 is used for limiting, positioning the rubber head 304. Then, the pinch plate 506 is released, causing the rectangular slider 502 to move to the left under the action of the spring force outside the pull rod 505, along with the top block 503 and the locking limit plate 504. This positions the locking limit plate 504 between two teeth on the locking gear 407, thus limiting the locking gear 407. Ultimately, this effectively locks and limits the rotating nut 406 and the locking screw 405, preventing them from loosening under stress. This also prevents the limiting mechanism 3 from moving during the circuit board drilling process, thus improving the fixing effect on the circuit board and avoiding quality defects such as drilling diameter deviation and poor hole position accuracy. This ensures that the tooling maintains high-precision positioning during processing. Finally, the circuit board can be drilled.

[0044] The following points should be noted in this article:

[0045] 1. The accompanying drawings of this utility model only relate to the structures involved in this utility model; other structures can be referred to conventional designs.

[0046] 2. Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0047] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A jig for drilling a circuit board, comprising: Base (1), a chip removal groove (101) is provided on the base (1), and two support plates (102) are slidably connected inside the chip removal groove (101); it is characterized in that a bidirectional adjustment screw rod (103) is rotatably connected to the base (1), two reverse threads are provided on the outside of the bidirectional adjustment screw rod (103), and the outside of the bidirectional adjustment screw rod (103) is threadedly connected to the two support plates (102) through the two reverse threads; a screw rod locking component (2) is provided at the left end of the bidirectional adjustment screw rod (103); a fixed block (105) is fixedly connected to the front side of the upper end surface of the base (1), and a U-shaped fixed frame (106) is fixedly connected to the front end surface of the fixed block (105). A limiting mechanism (3) is evenly arranged inside the U-shaped fixed frame (106), and a positioning mechanism (4) is installed at the rear side of the upper part of the U-shaped fixed frame (106). A nut locking mechanism (5) is provided at the top of the positioning mechanism (4).

2. The jig for processing a hole in a circuit board according to claim 1, characterized in that: A fixed clamping plate (104) is fixedly connected to the rear side of the upper end surface of the base (1), and a lower clamping plate (107) is fixedly connected to the lower end of the rear side inside the U-shaped fixed frame (106).

3. The jig for processing a hole in a circuit board according to Claim 1, wherein: The screw rod locking component (2) includes a circular fixing plate (201) and an annular fixing plate (205). The circular fixing plate (201) is fixedly connected to the left end of the bidirectional adjustment screw rod (103), and a sliding rod (202) is slidably connected to the circular fixing plate (201). A rotating handwheel (203) and an annular pressing plate (204) are respectively fixedly connected to the left and right ends of the sliding rod (202). A spring is sleeved outside each sliding rod (202) between the circular fixing plate (201) and the annular pressing plate (204). The annular fixing plate (205) is fixedly connected to the left end surface of the base (1), and locking plates (206) are fixedly connected to the left end surface of the annular fixing plate (205) in an annular array. Two limiting plates (207) are fixedly connected to the upper side of the right end surface of the annular pressing plate (204).

4. The jig for processing a hole in a circuit board according to Claim 1, wherein: When the screw rod locking component (2) is in the locking and limiting state, the two limiting plates (207) are respectively located on the front and rear sides of an upper locking plate (206).

5. The jig for processing a hole in a circuit board according to Claim 1, wherein: The limiting mechanism (3) includes a square sliding rod (301). The square sliding rod (301) is fixedly connected inside the U-shaped fixed frame (106), and a square sliding cylinder (302) is slidably connected to the outside of the square sliding rod (301). A spring is installed at the rear end of the square sliding rod (301) inside the square sliding cylinder (302). The rear end of the square sliding cylinder (302) is fixedly connected to a rectangular connecting plate (303), and a rubber head (304) is fixedly connected to the rear end surface of the rectangular connecting plate (303); a strip-shaped chute (305) is opened on the upper end surface of the square sliding cylinder (302), and a limiting slider (306) fixed to the upper end surface of the square sliding rod (301) is slidably connected inside the strip-shaped chute (305); the bottom end surfaces of the rectangular connecting plate (303) and the rubber head (304) are flush with the upper end surface of the support plate (102).

6. The jig for processing a hole in a circuit board according to Claim 1, wherein: The positioning mechanism (4) includes a rectangular fixing plate (401). Guide columns (402) are fixedly connected to both the left and right sides of the bottom end face of the rectangular fixing plate (401). The guide columns (402) are fixedly connected to the rear side of the upper end face of the U-shaped fixing frame (106). A movable plate (403) is slidably connected to the outside of the guide column (402). A rubber pad (404) is pasted on the bottom end face of the movable plate (403) by an adhesive. A locking screw (405) that penetrates the rectangular fixing plate (401) is fixedly connected to the middle of the upper end face of the movable plate (403). A rotating nut (406) that rotates on the top end face of the rectangular fixing plate (401) is threadedly connected to the outside of the locking screw (405). A locking gear (407) is fixedly connected to the outside of the rotating nut (406). A cylinder (408) is fixedly connected to the upper end face of the locking gear (407). A handwheel (409) is fixedly installed on the upper side of the outside of the cylinder (408).

7. The jig for processing a hole in a circuit board according to Claim 6, wherein: The nut locking mechanism (5) includes a rectangular sliding shell (501), which is fixedly installed on the upper surface of a rectangular fixed plate (401). A rectangular slider (502) is slidably connected inside the rectangular sliding shell (501). A pressing block (503) penetrating the left side wall of the rectangular sliding shell (501) is fixedly connected to the left end face of the rectangular slider (502). A locking limit plate (504) is fixedly connected to the left end face of the pressing block (503). A pulling rod (505) penetrating the right side wall of the rectangular sliding shell (501) is fixedly connected to the right end face of the rectangular slider (502). A pinch plate (506) is fixedly connected to the right end of the pulling rod (505). A spring is sleeved on the outside of the pulling rod (505) inside the rectangular sliding shell (501). An L-shaped auxiliary plate (507) is fixedly connected to the lower part of the right end face of the rectangular sliding shell (501).

8. The jig for processing a hole in a circuit board according to Claim 7, wherein: When the nut locking mechanism (5) is in the locking limit state, the locking limit plate (504) is located between two teeth on the locking gear (407).

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