Multifunctional screwdriver bit

Abstract

The utility model discloses a multifunctional screwdriver bit, relates to the screwdriver bit field, the multifunctional screwdriver bit comprises a mounting part, an extension part and a work head, the mounting part, the extension part and the work head are coaxially connected in sequence, the mounting part is used for jointing with a screwdriver handle, the extension part is connected between the mounting part and the work head; the working head comprises four convex wings, the four convex wings are connected in a cross shape, the opposite sides of the four convex wings are connected with one another, and the outer sides of the four convex wings are all provided with outer edge surfaces parallel to the axis of the working head; on a plane perpendicular to the axis of the working head, a connecting line is formed by two adjacent outer edge surfaces, and four connecting lines are connected to form a square. According to the screwdriver, one screwdriver bit can be matched with a crosshead screw and a square groove screw, the frequency of replacing the screwdriver bit when the screw is turned is reduced, and a user can use the screwdriver conveniently.

Description

Technical Field

[0001] This utility model relates to the field of screwdriver bits, and in particular to a multifunctional screwdriver bit. Background Technology

[0002] A screwdriver bit is the screwdriver tip of a screwdriver. Common screwdriver bits include Phillips head bits, flathead bits, and polygonal bits. The screwdriver bit is used with the corresponding screw head to apply torque to tighten or loosen the screw.

[0003] Traditional screwdriver bits can only be used with a single type of screw. For example, Phillips head bits can only be used with Phillips head screws, and square bits can only be used with square head screws. When connecting objects, multiple types of screws are often used. To accommodate different screws, multiple screwdriver bits need to be prepared and changed as needed, which is inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a multi-functional screwdriver bit that can be adapted to both Phillips head and square slot screws with a single bit, reducing the number of times the bit needs to be changed when tightening screws and making it more convenient for users.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A multi-functional screwdriver bit includes a mounting part, an extension part, and a working head, wherein the mounting part, the extension part, and the working head are coaxially connected in sequence, the mounting part is used to engage with a screwdriver handle, and the extension part is connected between the mounting part and the working head;

[0007] The working head includes four protruding wings, which are connected in a cross shape. The four protruding wings are connected to each other on opposite sides, and the outer sides of each of the four protruding wings have an outer edge surface parallel to the axis of the working head. On a plane perpendicular to the axis of the working head, a connecting line is drawn through two adjacent outer edge surfaces, and the four connecting lines form a square.

[0008] Furthermore, a first inclined surface is provided on the outer side of the convex fin. The first inclined surface is connected to the edge of the outer edge away from the extension. The first inclined surface is inclined in a direction away from the outer edge towards the axis of the working head.

[0009] Furthermore, the end face of the convex fin away from the extension has a second inclined surface, the second inclined surface is connected to the edge of the first inclined surface away from the outer edge, the second inclined surface is inclined in a direction away from the first inclined surface toward the axis of the working head, and the inclination angle of the second inclined surface is greater than the inclination angle of the first inclined surface.

[0010] Furthermore, the working head also includes a variable diameter section, which is connected between the convex fin and the extension. The end of the variable diameter section near the convex fin is flush with the outer side of the convex fin, and the diameter of the variable diameter section gradually increases in the direction away from the convex fin.

[0011] Furthermore, four extension grooves are provided on the variable diameter section, and a gap space is formed between two adjacent convex fins. The extension grooves and the gap spaces are aligned and connected in a one-to-one correspondence.

[0012] Furthermore, the depth of the extension groove gradually decreases along the direction away from the convex fin.

[0013] Furthermore, the mounting part is in the shape of a multifaceted prism, and an annular limiting groove is provided on the periphery of the mounting part.

[0014] Furthermore, the extension is cylindrical, and the diameter of the extension is smaller than the diameter of the working head and the mounting portion.

[0015] Furthermore, the outer edge surface is an arc surface, and the four outer edge surfaces are located on the same cylindrical surface.

[0016] In summary, this utility model has the following beneficial effects:

[0017] 1. This utility model discloses a multi-functional screwdriver bit. The mounting part is used for connecting the screwdriver handle, and the working head engages with the screw head via protruding wings. The four protruding wings are connected in a cross shape, allowing the working head to engage with Phillips head screws for tightening Phillips head screws. The outer edges of the four protruding wings are parallel to the axis of the working head, so that when applied to screws with square slots on the head, the four protruding wings can insert into the square slots and contact the inner wall of the square slots to transmit torque. The outer edges of the four protruding wings form a square, with the four protruding wings located at the four corners of the square, allowing them to fit into the square slots. This enables the working head to engage with the square slots to tighten screws with square slots on the head. Therefore, this multi-functional screwdriver bit can be used to tighten both Phillips head screws and square slot screws, reducing the frequency of bit changes and providing convenience for users.

[0018] 2. A first inclined surface is provided on the outer side of the convex fin. The first inclined surface is located on the side of the outer edge away from the extension. During the process of inserting the working head into the cross groove or square groove of the screw head, the first inclined surface first contacts the groove wall, thereby playing a guiding role and facilitating the insertion of the working head.

[0019] 3. The diameter of the variable diameter section gradually increases in the direction away from the fin, which makes the size of the working head thicker, thereby providing a larger torque when tightening screws, and at the same time enhancing the strength of the working head.

[0020] 4. The gap between the variable diameter section and the convex fin is aligned with the extension groove, so that when tightening screws with deeper cross-shaped grooves, the variable diameter section can also cooperate with the cross-shaped groove, making the working head fit better with the cross-shaped groove of the screw head, and reducing the likelihood of stripping when tightening screws. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a multifunctional bit according to an embodiment of the present invention. Figure 1 .

[0022] Figure 2 This is a three-dimensional structural diagram of a multifunctional bit according to an embodiment of the present invention. Figure 2 .

[0023] Figure 3 This is a three-dimensional structural diagram of the working head according to an embodiment of the present invention.

[0024] Figure 4 This is a right-side view of a multi-functional bit according to an embodiment of the present invention.

[0025] In the picture:

[0026] 1000 Multi-functional bit; 100 Mounting part; 110 Limiting groove; 200 Extension part; 300 Working head; 310 Protruding fin; 311 Outer edge surface; 312 First inclined surface; 313 Second inclined surface; 320 Clearance space; 330 Variable diameter section; 331 Extension groove. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] This embodiment discloses a multi-functional bit 1000, referencing... Figure 1 A multi-functional screwdriver bit 1000 includes a mounting part 100, an extension part 200, and a working head 300. The mounting part 100, the extension part 200, and the working head 300 are coaxially connected in sequence. The mounting part 100 is used to engage with the screwdriver handle. The extension part 200 is connected between the mounting part 100 and the working head 300. The working head 300 is used to mate with the cross groove or square groove of the screw head to transmit the torque of the bit to the screw.

[0029] Reference Figure 1 and Figure 2 The mounting portion 100 is in the shape of a multifaceted prism. A polygonal slot can be provided inside the screwdriver handle to fit the outer periphery of the mounting portion 100, thereby circumferentially limiting the mounting portion 100 and preventing the screwdriver bit from rotating relative to the screwdriver handle, thus transmitting torque. In this embodiment, the mounting portion 100 is specifically a regular hexagonal prism; however, in other embodiments, the mounting portion 100 may also be other prism shapes.

[0030] The mounting part 100 has an annular limiting groove 110 on its periphery. The screwdriver handle can be circumferentially limited by a protrusion that engages with the limiting groove 110, thereby fixing the multi-functional bit 1000 to the screwdriver arm.

[0031] Reference Figure 1 and Figure 2 The extension portion 200 connects the working head 300 and the mounting portion 100 to extend the length of the bit for easier user operation. In this embodiment, the extension portion 200 is cylindrical, and its diameter is smaller than that of the working head 300 and the mounting portion 100. Here, the diameter of the mounting portion 100 refers to the diameter of the inscribed circle of the hexagonal cross-section of the mounting portion 100, thereby reducing the material consumption and weight of the extension portion 200.

[0032] Reference Figures 2 to 4 The working head 300 includes four protruding wings 310, which are connected in a cross shape. That is, the four protruding wings 310 are fixed on the opposite side, and a gap space 320 is formed between two adjacent protruding wings 310. The included angle between two adjacent protruding wings 310 is 90°, so that the four protruding wings 310 are connected to form a cross-shaped structure, so as to cooperate with the screw of the cross-shaped groove head.

[0033] The four protruding fins 310 each have an outer edge surface 311 extending parallel to the axis of the working head 300. The four outer edge surfaces 311 can abut against the inner wall of the square slot of the screw, so that when applied to a screw with a square slot in the head, the four protruding fins 310 can be inserted into the square slot and contact the inner wall of the square slot to transmit torque.

[0034] Furthermore, on a plane perpendicular to the axis of the working head 300, a connecting line is drawn through two adjacent outer edges 311. The four connecting lines are connected end to end to form a square, that is, the four protruding wings 310 are located at the four corners of the square, so that the four protruding wings 310 can fit into the square groove, so that the working head 300 can cooperate with the square groove to tighten the screw with the square groove on the head.

[0035] Therefore, this multi-functional bit 1000 can be used to tighten both Phillips head screws and square slot screws, reducing the number of times users need to change bits and making it more convenient for users.

[0036] In this embodiment, the outer edge surface 311 is an arc surface to avoid stress concentration and breakage on the outer edge surface 311. The four outer edge surfaces 311 are located on the same cylindrical surface. When making the fins 310, the outer circle can be machined at the end of the working head 300 first, and then the gap space 320 can be milled to form the four fins 310.

[0037] The outer side of the fin 310 is provided with a first inclined surface 312, which is connected to the edge of the outer edge surface 311 away from the extension 200. The first inclined surface 312 is inclined in the direction away from the outer edge surface 311 towards the axis of the working head 300. During the process of the working head 300 being inserted into the cross or square slot of the screw head, the first inclined surface 312 first contacts the slot wall, thereby playing a guiding role and facilitating the insertion of the working head 300.

[0038] Reference Figure 2 and Figure 3 The end face of the convex fin 310 away from the extension 200 has a second inclined surface 313. The second inclined surface 313 is connected to the edge of the first inclined surface 312 away from the outer edge surface 311. The second inclined surface 313 is inclined in a direction away from the first inclined surface 312 toward the axis of the working head 300, and the inclination angle of the second inclined surface 313 is greater than the inclination angle of the first inclined surface 312. The end of the working head 300 is provided with a second inclined surface 313 with a large inclination angle, so that when the working head 300 is inserted into the slot of the screw head, the end of the working head 300 is not easily damaged due to stress concentration.

[0039] Reference Figure 2 and Figure 3 The working head 300 also includes a variable diameter section 330, which is connected between the fin 310 and the extension 200. The end of the variable diameter section 330 near the fin 310 is flush with the outer side of the fin 310. The diameter of the variable diameter section 330 gradually increases in the direction away from the fin 310, which makes the size of the working head 300 thicker, thereby providing a larger torque when tightening screws and enhancing the strength of the working head 300.

[0040] The variable diameter section 330 has four extension grooves 331. The gap spaces 320 between the four extension grooves 331 and the four protruding wings 310 are aligned and connected one by one. So when screwing a screw with a deep cross groove, the variable diameter section 330 can also cooperate with the cross groove, so that the working head 300 fits better with the cross groove of the screw head, and the screw is less likely to strip.

[0041] In particular, along the direction away from the fin 310, the depth of the extension groove 331 gradually decreases, so that when the working head 300 is used for screws with deeper cross grooves, as the working head 300 is inserted, the variable diameter section 330 fits more and more tightly with the cross groove, so as to facilitate screwing.

[0042] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A multi-functional screwdriver bit, characterized in that, The multi-functional screwdriver bit (1000) includes a mounting part (100), an extension part (200), and a working head (300). The mounting part (100), the extension part (200), and the working head (300) are coaxially connected in sequence. The mounting part (100) is used to engage with the screwdriver handle, and the extension part (200) is connected between the mounting part (100) and the working head (300). The working head (300) includes four convex wings (310), which are connected in a cross shape. The four convex wings (310) are connected to each other on opposite sides. The outer sides of the four convex wings (310) each have an outer edge surface (311) parallel to the axis of the working head (300). On a plane perpendicular to the axis of the working head (300), a connecting line is drawn through two adjacent outer edge surfaces (311), and the four connecting lines form a square.

2. A multi-functional bit according to claim 1, characterized in that, The outer side of the convex wing (310) is also provided with a first inclined surface (312), which is connected to the edge of the outer edge surface (311) away from the extension (200). The first inclined surface (312) is inclined in a direction away from the outer edge surface (311) toward the axis of the working head (300).

3. A multi-functional bit according to claim 2, characterized in that, The end face of the convex fin (310) away from the extension (200) has a second inclined surface (313). The second inclined surface (313) is connected to the edge of the first inclined surface (312) away from the outer edge (311). The second inclined surface (313) is inclined in a direction away from the first inclined surface (312) toward the axis of the working head (300), and the inclination angle of the second inclined surface (313) is greater than the inclination angle of the first inclined surface (312).

4. A multi-functional bit according to claim 1, characterized in that, The working head (300) also includes a variable diameter section (330), which is connected between the convex fin (310) and the extension (200). The end of the variable diameter section (330) near the convex fin (310) is flush with the outer side of the convex fin (310), and the diameter of the variable diameter section (330) gradually increases in the direction away from the convex fin (310).

5. A multi-functional bit according to claim 4, characterized in that, The variable diameter section (330) has four extension grooves (331), and a gap space (320) is formed between two adjacent convex wings (310). The extension grooves (331) and the gap spaces (320) are aligned and connected one by one.

6. A multi-functional bit according to claim 5, characterized in that, The depth of the extension groove (331) gradually decreases along the direction away from the convex fin (310).

7. A multi-functional bit according to claim 1, characterized in that, The mounting part (100) is in the shape of a multifaceted prism, and an annular limiting groove (110) is provided on the periphery of the mounting part (100).

8. A multi-functional bit according to claim 1, characterized in that, The extension (200) is cylindrical, and the diameter of the extension (200) is smaller than the diameter of the working head (300) and the mounting part (100).

9. A multi-functional bit according to claim 1, characterized in that, The outer edge surface (311) is an arc surface, and the four outer edge surfaces (311) are located on the same cylindrical surface.

Images