Miniature circuit board drill bit

Abstract

The utility model belongs to the technical field of drill bits, and particularly relates to a miniature circuit board drill bit, which comprises a drill bit part and a drill handle part, the top of the drill bit part is detachably mounted in the drill handle part, the drill bit part comprises a tool bit, the top end of the tool bit is fixedly connected with a diameter expanding part, the top end of the diameter expanding part is fixedly connected with a connecting rod, and the connecting rod is fixedly connected with the drill handle part. First arc-shaped clamping block sets are symmetrically arranged on the side wall of the connecting rod, a stepped hole is formed in the middle of the drill handle part, second arc-shaped clamping block sets are symmetrically arranged in the stepped hole, and the two first arc-shaped clamping block sets are connected with the two second arc-shaped clamping block sets in a clamped mode respectively. According to the utility model, the drill bit part and the drill handle part are detachably mounted, and when the drill bit part is broken during working, the drill bit part can be detached and then replaced, so that the quality of scrapped materials is reduced, and the cost is saved; the drill bit part and the drill handle part are connected in the mode that clamping is conducted firstly and then threaded pressing is conducted, and the drill bit part is convenient to install and replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bits, and particularly relates to a micro circuit board drill bit. Background Art

[0002] Micro drill bits usually refer to drill bits used for micro machining, with a diameter usually in the millimeter range. Such drill bits generally have high precision and small cutting force, and are suitable for machining precision parts or drilling holes in hard materials. The manufacturing of micro drill bits usually requires special materials and processes to ensure their precision and durability. When a circuit board is being processed, micro holes need to be opened on its surface, and micro drill bits are required for the opening operation.

[0003] The commonly used micro drill bits have an integral structure between the cutting head part and the shank part. Since the diameter ratio of the shank part of the micro drill bit to the diameter of the cutting head part is relatively large, the material used for the shank part of the micro drill bit occupies the vast majority of the entire drill bit. When the cutting head of the drill bit is scrapped during operation, the entire drill bit needs to be scrapped, resulting in a large amount of wasted material and increased production costs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a micro circuit board drill bit. After the cutting head of the drill bit breaks, the cutting head can be disassembled and then replaced, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A micro circuit board drill bit, comprising a cutting head and a shank. The top of the cutting head is detachably installed inside the shank. The cutting head includes a cutting tip, the top of the cutting tip is fixedly connected with a diameter-expanding part, the top of the diameter-expanding part is fixedly connected with a connecting rod, and a first set of arc-shaped clamping blocks is symmetrically arranged on the side wall of the connecting rod. A stepped hole is arranged in the middle of the shank, and a second set of arc-shaped clamping blocks is symmetrically arranged inside the stepped hole. The two first sets of arc-shaped clamping blocks are respectively clamped and connected with the two second sets of arc-shaped clamping blocks. A positioning component is inserted into the stepped hole, and a tightening component is threadedly connected to the top of the stepped hole.

[0006] Further, the first set of arc-shaped clamping blocks includes first arc-shaped clamping blocks equidistantly distributed along the length direction of the connecting rod, and the first arc-shaped clamping blocks are integrally connected to the side wall of the connecting rod.

[0007] Further, the second set of arc-shaped clamping blocks includes second arc-shaped clamping blocks equidistantly distributed along the length direction of the shank, and the second arc-shaped clamping blocks are fixedly connected to the inner wall of the stepped hole.

[0008] Further, the first arc-shaped clamping blocks and the second arc-shaped clamping blocks are of the same size, and the central angle of the first arc-shaped clamping blocks is 90°.

[0009] Further, the pressing member includes a threaded post, the bottom end of the threaded post is fixedly connected with a rubber block, and a cross groove is arranged at the top end of the rubber block.

[0010] Further, a threaded portion matching with the threaded post is arranged at the top of the stepped hole.

[0011] Further, the positioning member includes a top plate, insertion strips are symmetrically arranged at the bottom end of the top plate, the two insertion strips are respectively inserted between the two second arc-shaped clamping blocks, a round hole is arranged at the top end of the top plate, and the rubber block penetrates through the round hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the drill head part and the drill handle part are detachably installed. When the drill head part breaks during work, the drill head part can be removed and then replaced, so as to reduce the quality of waste materials and save costs; the drill head part and the drill handle part are connected by a method of first clamping and then thread pressing, and the drill head part is convenient to install and replace. Description of the Drawings

[0013] Figure 1 is a three-dimensional structural diagram of the utility model;

[0014] Figure 2 is a front sectional view of the utility model;

[0015] Figure 3 is an exploded view of the utility model;

[0016] Figure 4 is a three-dimensional structural diagram of the drill handle part of the utility model.

[0017] In the drawings, the list of components represented by each reference numeral is as follows:

[0018] 1. Drill head part; 11. Cutting head; 12. Diameter-expanding part; 13. Connecting rod; 14. First arc-shaped clamping block; 2. Drill handle part; 21. Stepped hole; 22. Threaded portion; 23. Second arc-shaped clamping block; 3. Pressing member; 31. Threaded post; 32. Rubber block; 33. Cross groove; 4. Positioning member; 41. Top plate; 42. Insertion strip; 43. Round hole. Detailed Embodiment

[0019] In order to make the purpose and advantages of the utility model clearer, the following combines embodiments to specifically describe the utility model. It should be understood that the following text only describes one or several specific implementation manners of the utility model, and does not strictly limit the specific protection scope claimed by the utility model.

[0020] Such as Figures 1-4As shown in the figure, a micro circuit board drill bit includes a drill head 1 and a drill shank 2. The top of the drill head 1 is detachably installed inside the drill shank 2. The drill head 1 includes a cutting head 11. The top end of the cutting head 11 is fixedly connected with a diameter-expanding part 12. The top end of the diameter-expanding part 12 is fixedly connected with a connecting rod 13. First arc-shaped clamping block groups are symmetrically arranged on the side wall of the connecting rod 13. A stepped hole 21 is arranged in the middle of the drill shank 2. Second arc-shaped clamping block groups are symmetrically arranged inside the stepped hole 21. The two first arc-shaped clamping block groups are respectively engaged and connected with the two second arc-shaped clamping block groups. A positioning member 4 is inserted into the stepped hole 21. A tightening member 3 is threadedly connected to the top of the stepped hole 21.

[0021] According to the above structure, during use, the drill head 1 and the drill shank 2 are detachably installed. When the drill head 1 breaks during work, the drill head 1 can be removed and then replaced, thereby reducing the quality of scrap materials and saving costs. When installing the drill head 1 and the drill shank 2, first, the connecting rod 13 is snap-fitted and installed inside the stepped hole 21. Then, by inserting the positioning member 4, the overall rotation of the drill head 1 is prevented. Finally, by screwing the tightening member 3 onto the top of the stepped hole 21, the fixed installation of the drill head 1 can be achieved. The installation of the drill head 1 is convenient and easy to replace.

[0022] As Figure 3 and 4 shown in the figure, the first arc-shaped clamping block group includes first arc-shaped clamping blocks 14 that are equidistantly distributed along the length direction of the connecting rod 13. The first arc-shaped clamping blocks 14 are integrally connected to the side wall of the connecting rod 13. The second arc-shaped clamping block group includes second arc-shaped clamping blocks 23 that are equidistantly distributed along the length direction of the drill shank 2. The second arc-shaped clamping blocks 23 are fixedly connected to the inner wall of the stepped hole 21. The first arc-shaped clamping blocks 14 and the second arc-shaped clamping blocks 23 are of the same size. The central angle of the first arc-shaped clamping blocks 14 is 90°.

[0023] According to the above structure, during installation, first, the two first arc-shaped clamping block groups are slid downward along the gap between the two second arc-shaped clamping block groups. When the diameter-expanding part 12 passes through the bottom end of the stepped hole 21, rotate the diameter-expanding part 12 to make several first arc-shaped clamping blocks 14 respectively snap into the gaps between the corresponding two second arc-shaped clamping blocks 23, thereby fixing the position of the drill head 1 in the vertical direction.

[0024] As Figure 3 and 4 shown in the figure, the positioning member 4 includes a top plate 41. Insertion strips 42 are symmetrically arranged at the bottom end of the top plate 41. The two insertion strips 42 are respectively inserted into the gaps between the two second arc-shaped clamping block groups. A round hole 43 is arranged at the top end of the top plate 41.

[0025] According to the above structure, when the diameter-expanding part 12 rotates 90°, at this time, the first arc-shaped clamping block 14 and the second arc-shaped clamping block 23 overlap in the vertical direction. Insert the two inserting strips 42 into the gaps between the two second arc-shaped clamping blocks 23 respectively. At this time, the rotation of the drill head part 1 can be prevented.

[0026] As Figure 3 and 4 shown, the pressing component 3 includes a threaded column 31. A rubber block 32 is fixedly connected to the bottom end of the threaded column 31. A cross groove 33 is arranged at the top end of the rubber block 32. A threaded part 22 matching with the threaded column 31 is arranged at the top of the stepped hole 21. The rubber block 32 penetrates through the round hole 43.

[0027] According to the above structure, to prevent the positioning component 4 from coming out of the stepped hole 21, after installing the positioning component 4, tighten the threaded column 31 on the top of the stepped hole 21 through the cross groove 33. During the tightening process, the rubber block 32 is squeezed. The tightening force of the rubber block 32 can press against the connecting rod 13, so that the cooperation between the first arc-shaped clamping block 14 and the second arc-shaped clamping block 23 is closer, the installation of the drill head part 1 is more stable, and the pre-tightening force between the thread of the threaded column 31 and the threaded part 22 can be increased to prevent the threaded column 31 from loosening.

[0028] The working principle of the present utility model is as follows: During installation, first slide the two first arc-shaped clamping block groups downward along the gaps between the two second arc-shaped clamping block groups. When the diameter-expanding part 12 passes through the bottom end of the stepped hole 21, rotate the diameter-expanding part 12 to make several first arc-shaped clamping blocks 14 respectively snap into the gaps between the corresponding two second arc-shaped clamping blocks 23, so as to fix the position of the drill head part 1 in the vertical direction. When the diameter-expanding part 12 rotates 90°, at this time, the first arc-shaped clamping block 14 and the second arc-shaped clamping block 23 overlap in the vertical direction. Insert the two inserting strips 42 into the gaps between the two second arc-shaped clamping blocks 23 respectively. At this time, the rotation of the drill head part 1 can be prevented. To prevent the positioning component 4 from coming out of the stepped hole 21, after installing the positioning component 4, tighten the threaded column 31 on the top of the stepped hole 21 through the cross groove 33. During the tightening process, the rubber block 32 is squeezed. The tightening force of the rubber block 32 can press against the connecting rod 13, so that the cooperation between the first arc-shaped clamping block 14 and the second arc-shaped clamping block 23 is closer, the installation of the drill head part 1 is more stable, and the pre-tightening force between the thread of the threaded column 31 and the threaded part 22 can be increased to prevent the threaded column 31 from loosening.

[0029] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model are implemented according to the conventional means in the art without special instructions and limitations.

Claims

1. A micro circuit board drill bit, comprising a drill head portion (1) and a drill shank portion (2), characterized in that: The top of the drill head portion (1) is detachably installed inside the drill shank portion (2). The drill head portion (1) includes a cutting head (11). The top end of the cutting head (11) is fixedly connected to a diameter-expanding portion (12). The top end of the diameter-expanding portion (12) is fixedly connected to a connecting rod (13). First arc-shaped clamping block groups are symmetrically arranged on the side wall of the connecting rod (13). A stepped hole (21) is arranged in the middle of the drill shank portion (2). Second arc-shaped clamping block groups are symmetrically arranged inside the stepped hole (21). The two first arc-shaped clamping block groups are respectively engaged and connected with the two second arc-shaped clamping block groups. A positioning member (4) is inserted inside the stepped hole (21). A tightening member (3) is threadedly connected to the top of the stepped hole (21).

2. A micro circuit board drill bit according to claim 1, characterized in that: The first arc-shaped clamping block group includes first arc-shaped clamping blocks (14) equidistantly distributed along the length direction of the connecting rod (13). The first arc-shaped clamping blocks (14) are integrally connected to the side wall of the connecting rod (13).

3. A micro circuit board drill bit according to claim 1, characterized in that: The second arc-shaped clamping block group includes second arc-shaped clamping blocks (23) equidistantly distributed along the length direction of the drill shank portion (2). The second arc-shaped clamping blocks (23) are fixedly connected to the inner wall of the stepped hole (21).

4. A micro circuit board drill bit according to claim 3, characterized in that: The first arc-shaped clamping blocks (14) and the second arc-shaped clamping blocks (23) are of the same size. The central angle of the first arc-shaped clamping blocks (14) is 90°.

5. A micro circuit board drill bit according to claim 4, characterized in that: The tightening member (3) includes a threaded post (31). A rubber block (32) is fixedly connected to the bottom end of the threaded post (31). A cross groove (33) is arranged at the top end of the rubber block (32).

6. The microcircuit board drill bit according to claim 5, characterized in that: A threaded portion (22) matching the threaded post (31) is arranged at the top of the stepped hole (21).

7. A micro circuit board drill bit according to claim 6, characterized in that: The positioning member (4) includes a top plate (41). Insertion strips (42) are symmetrically arranged at the bottom end of the top plate (41). The two insertion strips (42) are respectively inserted between the two second arc-shaped clamping block groups. A round hole (43) is arranged at the top end of the top plate (41). The rubber block (32) penetrates through the round hole (43).

Images