Antiskid drill bit for producing PCB (printed circuit board)

Abstract

The invention belongs to the technical field of drill bits, and particularly relates to an anti-skid drill bit for producing PCBs (printed circuit boards), which comprises a drill handle, a cutting edge is arranged at the lower end of the drill handle, a limiting disc is fixedly connected to the upper end of the drill handle, a connecting column is fixedly connected to the upper end face of the limiting disc, and an anti-skid device capable of preventing the drill handle from slipping in the use process is arranged on the connecting column. The expanding type anti-skidding and anti-splashing mechanism is used for preventing scraps from splashing; by means of the expanding type anti-skid and splash-proof mechanism, when the drill handle gets close to the position to be drilled, a positioning effect can be provided for the drill handle in the mode that the telescopic plate firstly makes contact with and abuts against the surface of the PCB, and due to the fact that the external force between the telescopic plate and the surface of the PCB is gradually increased, it is avoided that when the drill handle makes contact with the surface of the PCB, the drill handle is not prone to falling off when the drill handle makes contact with the surface of the PCB. The phenomenon that the drill handle slips is avoided, scratches are left on the surface of the PCB, the quality of the PCB is affected, even the PCB is damaged, and the manufacturing cost is increased due to the fact that the drill handle slips is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of drill bits, in particular to an anti-slip drill bit for producing PCB boards. Background Art

[0002] PCB board, also known as printed circuit board, is a base plate that connects electronic components through wires and connectors and provides electrical connection and support. In the production process of PCB board, drilling is an indispensable step. Drilling is mainly to drill conductive holes for connecting lines between layers on the board surface so that electronic components can be electrically connected through these holes. Therefore, drill bits are needed in PCB production.

[0003] The invention patent with announcement number CN105562788B discloses a drill bit for drilling holes in PCB boards, including a body, one end of the body is a drill tip, the body is sequentially provided with a constant groove width ratio section and a groove width ratio alternating section from one end of the drill tip to the other end, the outer side of the body is provided with a long spiral groove and a short spiral groove that are spirally surrounded and do not intersect, the groove width ratio of the long spiral groove and the short spiral groove is constant in the constant groove width ratio section, the groove width ratio of the long spiral groove and the short spiral groove in the alternating groove width ratio section alternately changes, and the short spiral groove in the constant groove width ratio section is connected with a staggered groove staggered from the short spiral groove. The drill bit for drilling holes in PCB boards provided by the invention adopts a double spiral groove non-intersecting design, in the rear section of the drill bit, the groove width ratio changes alternately, the double grooves independently remove chips, the chips are not easy to be blocked, the cutting temperature can be controlled in a lower range, and the area of ​​the spiral groove cross-section entity and the core thickness taper can be increased, the bending strength of the drill bit is improved, the hole processing accuracy is high, and the processing quality of the drilling is good.

[0004] However, the above technical solution still has the following deficiencies in practical application: The drill bit is prone to slipping during the drilling process. For example, when the drill bit is subjected to uneven force, it is easy to cause the drill bit to slip. Once it slips, it will leave scratches on the surface of the PCB board, affecting the quality of the PCB board, and even causing damage to the PCB, increasing the manufacturing cost. In addition, during the drilling process, the drill bit will produce flying debris, which will adhere to the surface of the PCB board and affect the quality of the PCB board surface.

[0005] To this end, the present invention provides a non-slip drill bit for producing PCB boards. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention proposes an anti-slip drill bit for producing PCB boards.

[0007] The technical solution adopted by the present invention to solve the technical problem is: an anti-skid drill handle for producing PCB boards, comprising a drill handle, a cutting edge is arranged at the lower end of the drill handle, a limit plate is fixedly connected to the upper end of the drill handle, a connecting column is fixedly connected to the upper end surface of the limit plate, and an expansion anti-skid and anti-splash mechanism is arranged on the connecting column to prevent the drill handle from slipping during use and to prevent debris from splashing; The expansion type anti-skid and anti-splash mechanism includes a mounting plate connected to a connecting column through an external thread, a plurality of slide cylinders are fixedly connected to the lower end surface of the mounting plate, a first slide rod is slidably connected to the inner cavity of the slide cylinder, a lower end of the slide rod is fixedly connected to a fixing ring, a plurality of second slide rods are slidably connected to the fixing ring, one end of the second slide rod is fixedly connected to a telescopic plate, a groove is provided on one side of the telescopic plate, and adjacent telescopic plates are plugged in and slidably connected through the groove.

[0008] Preferably, a spring 1 is fixedly connected to the upper end of the inner cavity wall of the slide cylinder, and a lower end of the spring is fixedly connected to the upper end of a slide rod 1.

[0009] Preferably, a connecting handle is fixedly connected to the upper end of the connecting column.

[0010] Preferably, a rotating ring is rotatably provided on the outer side of the fixed ring, a plurality of connecting rods are rotatably provided on the upper end surface of the rotating ring, and one end of the connecting rod is rotatably connected to one side of the upper end surface of the second sliding rod.

[0011] Preferably, a slide slot rod is fixedly connected to the front end of the right side of the rotating ring, and a guide column is inserted into and slidably connected to the slide slot rod.

[0012] Preferably, a slider is fixedly connected to the lower end of the guide column, and sliding rods three are slidably connected to both sides of the slider, and connecting plates are fixedly connected to both ends of the sliding rods three, and one end of the lower side of the connecting plate is fixedly connected to the fixing ring.

[0013] Preferably, a spring 2 is sleeved on the sliding rod 3 on one side, one end of the spring 2 is fixedly connected to the sliding block, and one end of the spring 2 is fixedly connected to the connecting plate.

[0014] Preferably, a handle is fixedly connected to the upper end of the guide column.

[0015] Preferably, connecting rods are fixedly connected to the middle parts of the left and right sides of the lower end surface of the mounting plate, and a scraper strip is fixedly connected to the lower end of the connecting rod.

[0016] Preferably, a non-slip rubber pad is provided on the lower end surface of the telescopic plate.

[0017] The beneficial effects of the present invention are as follows: 1. The anti-skid drill bit for producing PCB boards described in the present invention utilizes an expansion anti-skid and anti-splash mechanism. When the drill handle approaches the position to be drilled, the telescopic plate can first contact and press against the surface of the PCB board to provide a positioning effect for the drill handle. In addition, since the external force between the telescopic plate and the surface of the PCB board gradually increases, the drill handle is prevented from slipping when contacting the surface of the PCB board, and the situation that the drill handle slips and leaves scratches on the surface of the PCB board, affecting the quality of the PCB board, even causing damage to the PCB, and increasing the manufacturing cost is avoided. In addition, when the telescopic plate contacts the PCB board, the debris generated during the drilling process of the drill handle will be blocked by the telescopic plate, thereby avoiding The waste chips are prevented from splashing to other positions on the surface of the PCB board, thereby ensuring the cleanliness of other positions on the surface of the PCB board and improving the surface quality of the PCB board. Moreover, after the drilling is completed, the chips remaining near the top of the drill hole can be pushed by driving the telescopic plate to move radially, so that the chips fall out through the drill hole, thereby further ensuring the cleanliness of the surface of the PCB board. Moreover, when the telescopic plate moves radially and longitudinally, the chips attached to the inner side of the telescopic plate can be scraped off by the adjacent telescopic plates and scraping strips, thereby avoiding the situation where the chips attached to the inner side of the telescopic plate fall onto the surface of the PCB board when the drill handle drills a hole at the next position, thereby avoiding repeated contamination of the chips and further ensuring the cleanliness of the surface of the PCB board.

[0018] 2. The anti-slip drill bit for producing PCB boards described in the present invention facilitates quick disassembly of the connecting column and the mounting plate by means of threaded connection between the mounting plate and the connecting column for storage and other operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the local three-dimensional structure of the sliding sleeve; Figure 3 It is a schematic diagram of the local three-dimensional structure at the telescopic plate; Figure 4 yes Figure 3 A partial enlarged view of the middle part; Figure 5 It is a schematic diagram of the local three-dimensional structure of the fixed ring; Figure 6 It is a schematic diagram of the local three-dimensional structure of the slider; Figure 7 It is a schematic diagram of the local three-dimensional structure of the scraper strip; Figure 8 It is a schematic diagram of the local three-dimensional structure at the limit plate.

[0021] In the figure: 1. drill handle; 2. mounting plate; 3. connecting handle; 4. connecting column; 5. limit plate; 6. slide cylinder; 7. slide rod 1; 8. spring 1; 9. fixed ring; 10. rotating ring; 11. connecting rod; 12. slide rod 2; 13. telescopic plate; 14. groove; 15. handle; 16. guide column; 17. connecting plate; 18. slide rod; 19. slide rod 3; 20. spring 2; 21. slider; 22. anti-slip rubber pad; 23. external thread; 24. cutting edge; 25. connecting rod; 26. scraper. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Please refer to Figure 1-Figure 8 The present invention provides a technical solution: an anti-skid drill bit for producing PCB boards, comprising a drill handle 1, a cutting edge 24 is arranged at the lower end of the drill handle 1, a limit plate 5 is fixedly connected to the upper end of the drill handle 1, a connecting column 4 is fixedly connected to the upper end surface of the limit plate 5, and an expansion anti-skid and anti-splash mechanism is arranged on the connecting column 4, which can prevent the drill handle 1 from slipping during use and prevent debris from splashing; The expansion anti-skid and anti-splash mechanism includes a mounting plate 2 connected to a connecting column 4 through an external thread 23, a plurality of slide cylinders 6 are fixedly connected to the lower end surface of the mounting plate 2, a slide rod 7 is slidably connected to the inner cavity of the slide cylinder 6, a fixing ring 9 is fixedly connected to the lower end of the slide rod 7, a plurality of slide rods 2 12 are slidably connected to the fixing ring 9, a telescopic plate 13 is fixedly connected to one end of the slide rod 2 12, a groove 14 is provided on one side of the telescopic plate 13, and adjacent telescopic plates 13 are plugged and slidably connected through the groove 14.

[0024] In this embodiment, Figure 1-Figure 8 As shown, the upper end of the inner wall of the slide tube 6 is fixedly connected with a spring 8, and the lower end of the spring 8 is fixedly connected with the upper end of the slide rod 7; The upper end of the connecting column 4 is fixedly connected with a connecting handle 3; A rotating ring 10 is rotatably arranged on the outer side of the fixed ring 9, and a plurality of connecting rods 11 are rotatably arranged on the upper end surface of the rotating ring 10, and one end of the connecting rod 11 is rotatably connected to one side of the upper end surface of the sliding rod 12; A slide rod 18 is fixedly connected to the front end of the right side of the rotating ring 10, and the slide rod 18 is inserted into and slidably connected to the guide column 16; The lower end of the guide column 16 is fixedly connected with a slider 21, both sides of the slider 21 are slidably connected with a slider 3 19, both ends of the slider 3 19 are fixedly connected with a connecting plate 17, and one end of the lower side of the connecting plate 17 is fixedly connected to the fixing ring 9; A spring 20 is sleeved on the sliding rod 3 19 on one side, one end of the spring 20 is fixedly connected to the sliding block 21, and one end of the spring 20 is fixedly connected to the connecting plate 17; A handle 15 is fixedly connected to the upper end of the guide column 16; Connecting rods 25 are fixedly connected to the middle of both left and right sides of the lower end surface of the mounting plate 2, and scraping strips 26 are fixedly connected to the lower ends of the connecting rods 25; The lower end surface of the telescopic plate 13 is provided with an anti-skid rubber pad 22; Specifically, the existing drill bit may slip when in use. For example, when the drill bit is subjected to uneven force, it is easy to cause the drill bit to slip. Once it slips, it will leave scratches on the surface of the PCB board, affecting the quality of the PCB board, and even causing damage to the PCB, increasing the manufacturing cost. In addition, during the drilling process, the drill bit will produce flying debris, which will adhere to the surface of the PCB board, affecting the quality of the PCB board surface. Therefore, when the present embodiment is in use, the mounting plate 2 is sleeved on the connecting column 4, and the external thread 23 is threadedly connected to the connecting column 4 until the lower end surface of the mounting plate 2 is meshed with the limiting plate 5, and then the connecting handle 3 is used to fix it with the driving device. Thus, the mounting plate 2 is threadedly connected to the connecting column 4, which facilitates the quick disassembly of the connecting column 4 and the mounting plate 2 for storage and the like. Subsequently, the cutting edge 24 is aligned with the position of the PCB board to be drilled, and when the drill handle 1 approaches the position to be drilled, the telescopic plate 13 will first engage with the position to be drilled. The drill handle 1 is in contact with the surface of the PCB board and pressed against the PCB board. At the same time, under the action of the anti-skid rubber pad 22, the telescopic plate 13 can be prevented from sliding. At this time, the telescopic plate 13 can provide a positioning effect for the drill handle 1. When the drill handle 1 is pressed down until the cutting edge 24 contacts the surface of the PCB board, the slide bar 7 slides in the inner cavity of the slide cylinder 6, and the spring 8 is compressed, which can ensure the feed amount of the drill handle 1. In addition, since the external force between the telescopic plate 13 and the surface of the PCB board gradually increases, the drill handle 1 is prevented from slipping when it contacts the surface of the PCB board. When the drill handle 1 is in the process of drilling, the flying debris will be blocked by the telescopic plate 13, thereby preventing the waste debris from flying to other positions on the surface of the PCB board, ensuring the cleanliness of other positions on the surface of the PCB board and improving the surface quality of the PCB board. In addition, when the drill handle 1 is in the process of drilling, if it is in a vertical state, the drill handle 1 can be moved away from the drill hole after the drilling is completed, and the telescopic plate 13 still maintains a state of contact with the surface of the PCB board. At this time, the guide column 16 can be driven to move by holding the handle 15, and the guide column 16 slides on the inner side of the slide groove rod 18, so that the slider 21 can slide on the slide bar 3 19, so that the rotating ring 10 rotates on the fixed ring 9, and the slider 21 squeezes the spring 20, and the slide bar 2 12 can be driven to slide on the fixed ring 9 under the action of the connecting rod 11, so that the multiple telescopic plates 13 move toward the axis of the drill hole at the same time, and the telescopic plate 13 slides in the groove 14 until one side of the telescopic plate 13 is completely inserted into the groove 14. At this time, the polygonal area formed by the multiple telescopic plates 13 is the smallest. When the bottom of the telescopic plate 13 passes over the edge of the drill hole, the debris near the top of the drill hole can be pushed, so that the debris falls through the drill hole under the action of gravity, and the debris remaining around the drill hole can be removed, further ensuring the cleanliness of the surface of the PCB board; and when one side of the telescopic plate 13 is fully inserted into the groove 14, part of the debris on the inner side of the telescopic plate 13 will be scraped off, so that the preliminary cleaning of the debris attached to the inner side of the telescopic plate 13 can be achieved, and then the handle 15 is released, and under the action of the spring 20, the multiple telescopic plates are moved. 13 is reset and returns to the initial area, and then the slide bar 7 is driven to slide toward the inner cavity of the slide cylinder 6 again, so that the telescopic plate 13 is close to the scraper 26. At this time, the edge of the scraper 26 can just fit with the inner side of the telescopic plate 13, and the debris remaining on the inner side of the telescopic plate 13 can be scraped off, so that the inner side of the telescopic plate 13 is kept clean, and the situation that the debris attached to the inner side of the telescopic plate 13 falls on the surface of the PCB board when the drill handle 1 drills a hole at the next position is avoided, and the repeated contamination of the debris is avoided, and the cleanliness of the surface of the PCB board is further ensured; Therefore, by utilizing the expansion type anti-skid and anti-splash mechanism, when the drill handle 1 approaches the position to be drilled, the telescopic plate 13 can first contact and press against the surface of the PCB board to provide a positioning effect for the drill handle 1. In addition, since the external force between the telescopic plate 13 and the surface of the PCB board gradually increases, the drill handle 1 is prevented from slipping when contacting the surface of the PCB board, and the situation that the drill handle 1 slips and leaves scratches on the surface of the PCB board, affecting the quality of the PCB board, or even causing damage to the PCB, and increasing the manufacturing cost is avoided. In addition, when the telescopic plate 13 contacts the PCB board, the debris generated during the drilling process of the drill handle 1 will be blocked by the telescopic plate 13, thereby preventing the waste debris from being deposited on the surface of the PCB board. The situation of splashing at other positions ensures the cleanliness of other positions on the surface of the PCB board and improves the surface quality of the PCB board; and, after the drilling is completed, the debris remaining near the top of the drill hole can be pushed by driving the telescopic plate 13 to move radially, so that the debris falls out through the drill hole, further ensuring the cleanliness of the surface of the PCB board, and when the telescopic plate 13 moves radially and longitudinally, the debris attached to the inner side of the telescopic plate 13 can be scraped off by the adjacent telescopic plates 13 and the scraper strip 26, avoiding the situation that the debris attached to the inner side of the telescopic plate 13 falls on the surface of the PCB board when the drill handle 1 drills the next position, avoiding repeated contamination of the debris, and further ensuring the cleanliness of the surface of the PCB board.

[0025] Working principle: The mounting plate 2 is sleeved on the connecting column 4, and the external thread 23 is used to complete the threaded connection with the connecting column 4 until the lower end surface of the mounting plate 2 is meshed with the limit plate 5, and then the connecting handle 3 is used to fix it with the driving device. Thus, the mounting plate 2 is threadedly connected with the connecting column 4, which facilitates the rapid disassembly and assembly of the expansion type anti-skid and anti-splash mechanism for storage and maintenance. Subsequently, the cutting edge 24 is aligned with the position of the PCB board to be drilled. When the drill handle 1 approaches the position to be drilled, the telescopic plate 13 will first contact the surface of the PCB board and press against the PCB board, and at the same time Under the action of the anti-skid rubber pad 22, the telescopic plate 13 can be prevented from sliding. At this time, the telescopic plate 13 can provide a positioning effect for the drill handle 1. When the drill handle 1 is pressed down until the cutting edge 24 contacts the surface of the PCB board, the slide bar 7 slides in the inner cavity of the slide cylinder 6, and the spring 8 is compressed, which can ensure the feed amount of the drill handle 1. In addition, since the external force between the telescopic plate 13 and the surface of the PCB board gradually increases, the drill handle 1 is prevented from slipping when contacting the surface of the PCB board; and when the drill handle 1 is in the process of drilling, the flying debris will be blocked by the telescopic plate 13, thereby avoiding waste chips. The situation of splashing to other positions on the surface of the PCB board ensures the cleanliness of other positions on the surface of the PCB board and improves the surface quality of the PCB board. In addition, when the drill handle 1 is in a vertical state during the drilling process, the drill handle 1 can be moved away from the drill hole after the drilling is completed, and the telescopic plate 13 still maintains a state of contact with the surface of the PCB board. At this time, the guide column 16 can be driven to move by holding the handle 15, and the guide column 16 slides on the inner side of the slide groove rod 18, so that the slider 21 can slide on the slide rod 3 19, so that the rotating ring 10 rotates on the fixed ring 9, and the slider 21 is pressed against the spring The second 20 is squeezed, and the sliding rod 12 can be driven to slide on the fixing ring 9 under the action of the connecting rod 11, so that the multiple telescopic plates 13 move toward the axis of the drill hole at the same time, and the telescopic plates 13 slide in the groove 14 until one side of the telescopic plates 13 is completely inserted into the groove 14. At this time, the polygonal area formed by the multiple telescopic plates 13 is the smallest, and the bottom of the telescopic plate 13 passes over the edge of the drill hole, so that the debris near the top of the drill hole can be pushed, so that the debris falls through the drill hole under the action of gravity, and the debris remaining around the drill hole can be removed, further ensuring the cleanliness of the surface of the PCB board;When one side of the telescopic plate 13 is fully inserted into the groove 14, some debris on the inner side of the telescopic plate 13 will be scraped off, and the initial cleaning of the debris attached to the inner side of the telescopic plate 13 can be achieved. Then, the handle 15 is released, and under the action of the spring 20, the multiple telescopic plates 13 are reset and return to the initial area. Then, the slide bar 17 is driven to slide toward the inner cavity of the slide cylinder 6 again, so that the telescopic plate 13 is close to the scraper 26. At this time, the edge of the scraper 26 can just fit with the inner side of the telescopic plate 13, so that the debris remaining on the inner side of the telescopic plate 13 can be scraped off, so that the telescopic plate 13 can be cleaned. The drill handle 1 is kept clean, so that when the drill handle 1 drills the next position, the debris attached to the inner side of the telescopic plate 13 is prevented from falling onto the surface of the PCB board, thereby avoiding repeated contamination of the debris and further ensuring the cleanliness of the surface of the PCB board; thus, by utilizing the expansion type anti-skid and anti-splash mechanism, when the drill handle 1 approaches the position to be drilled, the telescopic plate 13 can first contact and press against the surface of the PCB board, thereby providing a positioning effect for the drill handle 1, and since the external force between the telescopic plate 13 and the surface of the PCB board gradually increases, the occurrence of the drill handle 1 and the PCB board being prevented from slipping. When the drill handle 1 contacts the PCB board surface, the drill handle 1 slips, which avoids the situation that the drill handle 1 slips and leaves scratches on the PCB board surface, affects the quality of the PCB board, even causes damage to the PCB, and increases the manufacturing cost. In addition, when the telescopic plate 13 contacts the PCB board, the debris generated during the drilling process of the drill handle 1 will be blocked by the telescopic plate 13, thereby avoiding the waste debris from splashing to other positions on the PCB board surface, ensuring the cleanliness of other positions on the PCB board surface, and improving the surface quality of the PCB board; and after the drilling is completed, the telescopic plate 13 can be driven to move radially to push the debris remaining near the top of the drill hole, so that the debris falls out through the drill hole, further ensuring the cleanliness of the PCB board surface, and when the telescopic plate 13 moves radially and longitudinally, the debris attached to the inner side of the telescopic plate 13 can be scraped off by the adjacent telescopic plates 13 and the scraping strips 26, avoiding the situation that the debris attached to the inner side of the telescopic plate 13 falls on the PCB board surface when the drill handle 1 drills the next position, avoiding repeated contamination of the debris, and further ensuring the cleanliness of the PCB board surface. ;

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A non-slip drill bit for producing PCB boards, comprising a drill handle (1), characterized in that: The lower end of the drill shank (1) is provided with a cutting edge (24); the upper end of the drill shank (1) is fixedly connected to a limit plate (5); the upper end surface of the limit plate (5) is fixedly connected to a connecting column (4); the connecting column (4) is provided with an expansion type anti-skid and anti-splash mechanism capable of preventing the drill shank (1) from slipping during use and preventing debris from splashing; The expansion type anti-skid and anti-splash mechanism comprises a mounting plate (2) connected to a connecting column (4) via an external thread (23); a plurality of slide cylinders (6) are fixedly connected to the lower end surface of the mounting plate (2); a first slide rod (7) is slidably connected to the inner cavity of the slide cylinder (6); a fixing ring (9) is fixedly connected to the lower end of the first slide rod (7); a plurality of second slide rods (12) are slidably connected to the fixing ring (9); one end of the second slide rod (12) is fixedly connected to a telescopic plate (13); a groove (14) is provided on one side of the telescopic plate (13); adjacent telescopic plates (13) are plugged in and slidably connected via the groove (14).

2. The anti-slip drill bit for producing PCB boards according to claim 1, characterized in that: A spring 1 (8) is fixedly connected to the upper end of the inner cavity wall of the slide cylinder (6), and the lower end of the spring 1 (8) is fixedly connected to the upper end of the slide rod 1 (7).

3. The anti-slip drill bit for producing PCB boards according to claim 1, characterized in that: The upper end of the connecting column (4) is fixedly connected to a connecting handle (3).

4. The anti-slip drill bit for producing PCB boards according to claim 1, characterized in that: A rotating ring (10) is rotatably arranged outside the fixed ring (9), and a plurality of connecting rods (11) are rotatably arranged on the upper end surface of the rotating ring (10), and one end of the connecting rod (11) is rotatably connected to one side of the upper end surface of the second sliding rod (12).

5. The anti-slip drill bit for producing PCB boards according to claim 4, characterized in that: A slide slot rod (18) is fixedly connected to the front end of the right side of the rotating ring (10), and the slide slot rod (18) is inserted into and slidably connected to a guide column (16).

6. The anti-slip drill bit for producing PCB boards according to claim 5, characterized in that: The lower end of the guide column (16) is fixedly connected to a slider (21), both sides of the slider (21) are slidably connected to a third slider (19), both ends of the third slider (19) are fixedly connected to a connecting plate (17), and one end of the lower side of the connecting plate (17) is fixedly connected to the fixing ring (9).

7. The anti-slip drill bit for producing PCB boards according to claim 6, characterized in that: A spring 2 (20) is sleeved on the sliding rod 3 (19) on one side, one end of the spring 2 (20) is fixedly connected to the sliding block (21), and one end of the spring 2 (20) is fixedly connected to the connecting plate (17).

8. The anti-slip drill bit for producing PCB boards according to claim 5, characterized in that: The upper end of the guide column (16) is fixedly connected to a handle (15).

9. The anti-slip drill bit for producing PCB boards according to claim 8, characterized in that: Connecting rods (25) are fixedly connected to the middle parts of the left and right sides of the lower end surface of the mounting plate (2), and scraping strips (26) are fixedly connected to the lower ends of the connecting rods (25).

10. The anti-slip drill bit for producing PCB boards according to claim 1, characterized in that: The lower end surface of the telescopic plate (13) is provided with an anti-slip rubber pad (22).

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