Multi-grip point screwdriver device

Abstract

The present invention discloses a multi-grip-point screwdriver device that can effectively transfer torque to a socket fastener. The present invention includes: at least one screwdriver bit body. The screwdriver bit body further includes: a plurality of side walls, a first base surface, and a second base surface. The plurality of side walls radially surround a rotation axis of the screwdriver bit body. Each side wall further includes: a first side edge, a second side edge, a side surface, and at least one engagement cavity. The engagement cavity creates additional grip points, thereby preventing slippage between the screwdriver bit body and the socket fastener. The engagement cavity is recessed into the side surface. The engagement cavity extends on the screwdriver bit body from the first base surface toward the second base surface. The engagement cavity is located at a position a first distance from the first side edge.

Description

Technical Field

[0001] The present invention relates to tools for loosening and fastening fasteners (such as screws and nuts), and particularly to a non-slip multi-directional screwdriver bit that can prevent the screwdriver bit from damaging / wearing the fastener or slipping off the fastener during the process of removing or fastening the fastener. Background Art

[0002] Hexagon bolts, nuts, screws, and other similar threaded fasteners fix a plurality of parts together by engaging with complementary threads (usually the so-called female threads). The structure of such fasteners generally includes: a cylindrical shaft portion having an external thread, and a head at the end of the shaft portion. This external thread engages with a complementary female thread to fix the fastener and simultaneously fix the related parts, where the female thread is usually formed by tapping into a hole or nut. The fastener is rotated or driven into the female thread by receiving an external torque through its head. The shape of the head is manufactured to allow an external tool, such as a wrench, to apply torque to the fastener to rotate the fastener and engage it to a certain extent with the complementary female thread. Such fasteners are simple, inexpensive, and very effective, and thus are commonly used in modern society.

[0003] One of the common problems with using such fasteners is that the tool often slips on the head, whether the fastener is male or female. The reasons may include: wear of the tool or fastener, rust of the tool or fastener, over-tightening of the fastener, or damage to the head of the fastener. Summary of the Invention

[0004] The present invention is a design of a screwdriver bit that can substantially eliminate slippage. The design of the present invention includes several parts. The overall function of these parts can engage the head of the fastener, thereby effectively transmitting torque between the screwdriver bit and the head of the fastener. Traditional bolt screwdrivers may require tools and drilling that are not originally needed. The present invention avoids these problems. With the development of electric screwdrivers and drills, people have generally used electric tools to apply torque to remove fasteners. The present invention provides a single-headed or double-headed screwdriver bit that can apply torque to the fastener clockwise or counterclockwise to tighten or loosen the fastener. Most screwdriver bits have a standard quarter-inch hexagonal clamping end, and also include but are not limited to square, hexagonal, or star-shaped drive ends. Description of the Drawings

[0005] Figure 1 is a perspective view of the present invention.

[0006] Figure 2 is a perspective view of an embodiment of the present invention.

[0007] Figure 3 is Figure 2 a front view of the embodiment.

[0008] Figure 4 is Figure 2 The rear view of the embodiment.

[0009] Figure 5 is the perspective view of another embodiment of the present invention.

[0010] Figure 6 is the bottom perspective view of the present invention.

[0011] Figure 7 is the perspective view of yet another embodiment of the present invention.

[0012] Figure 8 is the perspective view of another embodiment of the present invention.

[0013] Figure 9 is Figure 8 The front view of the embodiment.

[0014] Figure 10 is the perspective view of still another embodiment of the present invention.

[0015] Figure 11 is the perspective view of yet another embodiment of the present invention.

[0016] Figure 12 is the perspective view of another embodiment of the present invention.

[0017] Figure 13 is a front view, which shows another embodiment related to the Figure 2 embodiment, wherein the overall cross-section of the bonding cavity is a triangular profile.

[0018] Figure 14 is a front view, which shows another embodiment related to the Figure 2 embodiment, wherein the overall cross-section of the bonding cavity is a triangular profile.

[0019] Figure 15 is a front view, which shows another embodiment related to the Figure 2 embodiment, wherein the overall cross-section of the bonding cavity is a triangular profile.

[0020] Figure 16 is a front view, which shows another embodiment related to the Figure 15 embodiment, wherein different parts of one side wall are concave or convex.

[0021] Figure 17 is a front view, which shows another embodiment related to the Figure 15 embodiment, wherein different parts of one side wall are convex or concave.

[0022] Figure 18is a front view showing another embodiment related to Figure 15 an embodiment, in which the engaging socket is configured between flat side walls.

[0023] Figure 19 is a front view showing another embodiment related to Figure 15 an embodiment, in which the engaging socket is configured between flat side walls.

[0024] Figure 20 is a front view showing another embodiment related to Figure 15 an embodiment, in which the engaging socket is configured between flat side walls.

[0025] Figure 21 is a perspective view showing another embodiment related to Figure 2 an embodiment, in which the double-headed screwdriver bit body is angled relative to each other.

[0026] Figure 22 is a front view showing another embodiment related to Figure 15 an embodiment, in which the engaging socket is configured between flat side walls. DETAILED DESCRIPTION

[0027] It should be specifically noted at the beginning that the diagrams used in this specification are only for illustrating certain embodiments of the present invention, and the scope of the present invention is not limited by these diagrams.

[0028] The present invention relates to accessories for torque tools, particularly to a multi-grip-point screwdriver bit, which is a type of screwdriver bit or screw driving bit. Compared with other conventional screwdriver bits of similar size, the present invention can apply greater torque to fasteners without damaging the head of the fastener or the bit tool. The efficacy of the present invention is achieved by an engaging structure having a plurality of features that enable the engaging structure to effectively grip the head of the fastener. The present invention is a screwdriver bit that is compatible with a variety of torque tools, including: traditional drills, screwdrivers that can accommodate bits, socket wrenches, socket drivers, but these torque tools are not limited to the above-mentioned torque tools.

[0029] Please refer to Figure 1, which is the simplest embodiment of the present invention. In this embodiment, the present invention at least includes: at least one screwdriver bit body 1 and an attachment body 19. The screwdriver bit body 1 is a shank that can be combined with socket fasteners, such as socket screws and socket bolts, so as to quickly apply torque to the socket fasteners. The screwdriver bit body 1 further includes: a plurality of side walls 2, a first base surface 14, a second base surface 15, and at least one engaging socket 8. At least one engaging socket 8 is recessed into at least one screwdriver bit body 1 from the side direction, so that in the preferred application of the present invention, it helps to disperse the applied torque to maximize efficiency and minimize wear. Generally, the screwdriver bit body 1 is a prism made of high-strength metal. The plurality of side walls 2 are combined with the socket fasteners and clamp the socket fasteners to effectively transfer the torque from the torque tool to the socket fasteners. The first base surface 14 and the second base surface 15 are opposite to each other across the plurality of side walls 2; more preferably, the first base surface 14 and the second base surface 15 are perpendicular to the plurality of side walls 2, forming a prismatic screwdriver bit body 1. In a preferred embodiment of the present invention, the first base surface 14 further includes a first base surface 26, wherein the first base surface 26 is a plane and perpendicular to the side surface 5 of each of the plurality of side walls 2. The side surface 5 further includes a first portion 33. The first portion 33 is a part of the side surface 5 and reaches a position near the first side edge 3 along a first distance 21. The attachment body 19 allows the present invention to be attached to an external torque tool, whereby torque can be applied to the socket fasteners via the screwdriver bit body 1. The attachment body 19 is distributed along a rotation axis 16 of the screwdriver bit body 1 and surrounds the rotation axis 16, and its center is located on the rotation axis 16. Therefore, the rotation axis of the attachment body 19 coincides with the rotation axis 16 of the screwdriver bit body 1. Moreover, the attachment body 19 is connected to the second base surface 15. In a preferred embodiment of the present invention, the attachment body 19 has a hexagonal cross-section and can thus be combined with a female attachment component of an external torque tool. The external torque tool can be, but is not limited to: an electric drill, a torque wrench, a pneumatic drill, a socket screwdriver, and other similar torque tools. In a preferred example of the present invention, the overall cross-section of the engaging socket 8 further includes: a curved region and a straight region. In other embodiments of the present invention, the engaging socket 8 can have other shaped profiles. Other shaped profiles include, but are not limited to: square, rectangular, and partially circular profiles. Furthermore, the shape of each region of the engaging socket 8 can be selected from a group that includes: straight line, concave line, and convex line. The combined use or single use of these shapes can further improve the service life, safety, and functionality of the present invention in certain applications selected by the user. In an embodiment of the present invention, the overall cross-section 9 of the engaging socket 8 is a triangular profile.When torque is applied, at least one engaging cavity 8 is under pressure and undergoes strain, and this triangular cross-section provides a large space to relieve stress. Moreover, this triangular cross-section can be a concave line in the direction from the first side edge 3 to the second side edge 4. In this situation, during the application of torque, the stress is captured by at least one engaging cavity 8. In other embodiments of the present invention, at least one engaging cavity 8 has both a curved region and a straight region simultaneously. This design enables the engaging cavity 8 to interact optimally with different fastener cross-sections, different materials, and different magnitudes of stress.

[0030] In the use of certain embodiments, it is more conducive to leverage and resistance to mechanical wear. To achieve this purpose, at least one engaging cavity 8 and the first side edge 3 of at least one specific sidewall 36 are separated by a first distance 21, as Figure 9 , Figure 18 , Figure 19 , Figure 21 , and Figure 22 shown. Thus, a clamping point is formed by a side surface 5 and at least one engaging cavity 8. The first part 33 of the side surface 5 of at least one specific sidewall 36 is distributed along the first distance 21. Thus, the first distance 21 covers the section of the first part 33. The width 35 of at least one engaging cavity 8 is parallel to the side surface 5. This design makes the width 35 parallel to the first distance 21. The width 35 can be greater than the first distance 21. In this way, it can be ensured that at least one engaging cavity 8 covers a significant part of the effective area of the side surface 5.

[0031] In the present invention, the first part 33 can have various different shapes to achieve optimal performance under various stresses and usage conditions. To ensure that at least one engaging cavity 8 can have an appropriate shape, the shape of the first part 33 can be selected from a group that includes: a straight line, a concave line, and a convex line, as Figures 14 to 17 shown. Any selected shape can provide optimal support during use and improve the durability of the present invention.

[0032] The side surface 5 can further benefit from a more complex shape or design. To achieve this purpose, the side surface 5 can further include: a second part 34, as Figures 14 to 17As shown. The second part 34 is an area of the side 5, distributed along a second distance 22 such that the second part 34 is adjacent to a second side edge 4. The at least one engaging hole 8 and the second side edge 4 of the at least one specific side wall 36 are separated by a second distance 22. The second distance 22 represents a space relative to the first distance 21, and this space is between the at least one engaging hole 8 and the second side edge 4. The second part 34 of the side 5 of the at least one specific side wall 36 is distributed along the second distance 22. Thus, the second distance 22 covers the section of the second part 34. The shape of the second part 34 can be selected from a group that includes: a straight line, a concave line, and a convex line. Thus, the second part 34 allows the present invention to best adapt to potential mechanical fatigue. Moreover, the at least one engaging hole 8 tapers in a direction perpendicular to the rotation axis and towards a side edge from a position adjacent to the first distance 21 or the second distance 22. Such a design allows the present invention to best apply force during rotation. A side geometric plane is distributed along the side 5 and is adjacent to the at least one engaging hole 8. A side edge geometric plane extends from the first side edge 3 to the second side edge 4. In a preferred embodiment of the present invention, the side geometric plane is collinear with the side edge geometric plane. In some embodiments of the present invention, the side geometric plane is not collinear with the side edge geometric plane but is away from the side edge geometric plane.

[0033] In many situations, the user may wish to apply torque to an external screw from different angles. To achieve this purpose, the second part 34 of the side 5 of the at least one specific side wall 36 is at an angle relative to the first part 33 of the side 5 of the at least one specific side wall 36. This design allows holes of other shapes on the external screw to also be accurately filled by the present invention. This design is also within the scope of the present invention.

[0034] This triangular cross-section can further include: a plurality of vertices 27, as Figure 15 shown. The plurality of vertices 27 are related to the locus of the corners of the triangular cross-section. Each of the plurality of vertices 27 can be a rounded corner. This design can prevent point stress from accumulating at the plurality of vertices 27 and does not significantly reduce the space required to effectively eliminate the fatigue effect.

[0035] In many situations, depending on the strength of the torsional stress and the shape of the bolt or device, it may be more advantageous to allow minor modifications to a strict triangular cross-section. To achieve better efficiency in some situations, the triangular cross-section can include: a plurality of vertices 31 and a pair of extensions 32, as Figure 16 and Figure 17As shown. The plurality of vertices 31 are related to the locus of the triangular cross-section corners. The plurality of vertices 31 can be regarded as two leading edge elements along the first side edge 3 and the second side edge 4, and can also be regarded as a recess base element. The recess base element can also be a straight line connecting a pair of extensions 32. A pair of extensions 32 represent the edges connecting the plurality of vertices 31. That is to say, each of this pair of extensions 32 connects each of the plurality of vertices 31. The shape of each of this pair of extensions 32 can be selected from a group that includes: a straight line, a concave line, and a convex line. The shape of the plurality of vertices 31, a pair of extensions 32, or a recess base element can be a rounded corner or an angled shape. Such a design can allow this pair of extensions 32 to better adapt to different torsional stresses and prevent fatigue from causing adverse wear to the screwdriver bit.

[0036] Other applications may also require modification of the edges of the triangular cross-section perimeter. To achieve this purpose, the side surface 5 can further include: a first part 33 and a second part 34, as Figure 16 and Figure 17 shown. The first part 33 and the second part 34 are related to the edges surrounding the triangular cross-section. The first part 33 is distributed along a first distance 21 such that the first part 33 is adjacent to the first side edge 3. Furthermore, the second part 34 is distributed along a second distance 22 such that the second part 34 is adjacent to the second side edge 4. The shapes that can be selected as the first part 33 and the second part 34 can be a rounded corner or an angled shape, as Figure 16 and Figure 17 shown. For the first part 33 and the second part 34, it is most advantageous for the two to exhibit opposite curvatures. For example: one of them is a concave shape and the other is a protruding shape, so that the periodic stress acting on the present invention can be most effectively eliminated. More modifications can also be implemented on the first side edge 3 and the second side edge 4 to form a rounded or angled side edge.

[0037] Please refer to Figure 3 and Figure 4 . Each of the plurality of side walls 2 further includes: a first side edge 3, a second side edge 4, and a side surface 5. The plurality of side walls 2 are radially distributed around the rotation axis 16 of the screwdriver bit body 1, thereby generating a geometric cross-section complementary to the socket fastener. The number of the plurality of side walls 2 depends on the shape and cross-section of the socket fastener. In an embodiment of the present invention, the number of the plurality of side walls 2 is 6, which generates a hexagonal screwdriver bit body 1. In another embodiment of the present invention, the number of the plurality of side walls 2 is 4.

[0038] The side surface 5 physically abuts against the socket fastener, particularly the side wall of the head of the socket fastener. The first side edge 3 and the second side edge 4 are opposite to each other across the side surface 5. From either the top view or the bottom view, the first side edge 3 and the second side edge 4 of each of the plurality of side walls 2 form the corners of the screwdriver bit body 1. The engaging socket 8 extends perpendicularly from the plurality of side walls 2 into the side surface 5 of at least one specific side wall 36, thereby generating additional clamping points / teeth on the side surface 5. In other embodiments of the present invention, the clamping point is generated by the engaging socket 8 and an adjacent edge, which can be the first side edge 3 or the second side edge 4, particularly the side edge closest to the engaging socket 8. Furthermore, the engaging socket 8 on the screwdriver bit body 1 extends from the first base surface 14 to the second base surface 15. This can ensure that the additional clamping points extend along the length of the screwdriver bit body 1, thereby obtaining the maximum clamping force between the screwdriver bit body 1 and the socket fastener. To more effectively achieve this purpose, an overall cross-section 9 of the engaging socket 8 is parallel to the first base surface 14 and the second base surface 15. In certain embodiments of the present invention, at least one engaging socket 8 tapers from the first base surface 14 to the second base surface 15, as Figure 11 shown. In this embodiment, at least one engaging socket 8 tapers from the first base surface 14 to the second base surface 15 in the following manner: the triangular cross-section near the first base surface 14 is larger than the triangular cross-section near the second base surface 15. Thus, the shape of at least one engaging socket 8 can be appropriately changed to meet the user's needs. In one embodiment of the present invention, the overall cross-section 9 of the engaging socket 8 is a semi-circular cross-section, as Figure 3 shown. Furthermore, this semi-circular cross-section is recessed inward from the direction perpendicular to the line connecting the first side edge 3 and the second side edge 4. This semi-circular cross-section can ensure that there are no or few high stress points on the screwdriver bit body 1. Therefore, the overall lifespan of the tool is increased. In other embodiments of the present invention, the overall cross-section 9 of the engaging socket 8 is a triangular cross-section, as Figure 13 and Figure 14 shown. Furthermore, this triangular cross-section is recessed inward from the direction perpendicular to the line connecting the first side edge 3 and the second side edge 4. Other cross-sections that can be used for the engaging socket 8 can be, but are not limited to, a semi-square cross-section, a semi-rectangular cross-section, or a semi-elliptical cross-section.

[0039] Please refer to Figure 8 and Figure 9In an embodiment of the present invention, the overall cross-section 9 of the engagement cavity 8 includes: a curved region 10 and a straight region 11. In this embodiment, the present invention is implemented in the form of a screwdriver bit, and the present invention is designed to remove damaged fasteners, damaged screws, damaged bolts, and other similar objects. In this embodiment, the engagement cavity 8 is given a special shape to form sharp engaging teeth that can grip the corners of the socket fastener, allowing material to enter the engagement cavity 8 from the inside of the socket fastener, thereby generating a clamping force far superior to that of traditional tools. Compared with the present invention, traditional tools are only designed to push materials. The clamping force of the present invention is particularly effective for worn or damaged fastener sockets. More specifically, the curved region 10 is a semi-circular curve adjacent to the first side edge 3. The curved region 10 is adjacent to the first part 33 of the side surface 5 of at least one specific side wall 36 and is relative to the first side edge 3. This design enables the first part 33 to effectively position the curved region 10 relative to the first distance 21. The straight region 11 is adjacent to the curved region 10 and is relative to the first part 33. The straight region 11 guides a part of the socket fastener to abut against the engaging teeth. Therefore, the straight region 11 extends from the curved region 10 to the second side edge 4. More specifically, the straight region 11 starts from the curved region 10 and ends at the second side edge 4.

[0040] Please refer to Figure 11 In an embodiment of the present invention, the engagement cavity 8 is located at the center of the side surface 5. More specifically, the engagement cavity 8 is separated from the second side edge 4 of at least one specific side wall 36 by a second distance 22. In order to be positioned at the center, the first distance 21 is equal to the second distance 22, as Figure 15 shown. Such a design enables the engagement cavity 8 to grip the socket fastener and transfer the torsional stress towards or away from the corner of the fastener side surface, so as to strengthen the holding function and prevent the fastener from becoming dull, to most effectively transmit torque, and to minimize the possibility of slippage. Furthermore, in this embodiment, the socket fastener can be rotated in a clockwise or counterclockwise direction. In an embodiment of the present invention, a plurality of intermittent side walls 24 are interspersed between at least one specific side wall 36, and the first distance 21 is equal to the second distance 22, as Figure 19 and Figure 22 shown.

[0041] In an embodiment of the present invention, the ratio between the first distance 21, the second distance 22, and the width of the engaging socket 8 can be changed to achieve a dedicated clockwise or counterclockwise design. In an embodiment of the present invention, the present invention is designed to be a clockwise screwdriver bit. In this embodiment, the second distance 22 is greater than the first distance 21. More specifically, the ratio between the first distance 21, the second distance 22, and the width of the engaging socket 8 is 1:5:4, whereby a design of the present invention can be achieved, which clamps and applies torque to the socket fastener in the clockwise direction. This design is used to screw in and fix the socket fastener. In an embodiment of the present invention, the present invention is designed to be a counterclockwise screwdriver bit. In this embodiment, the first distance 21 is greater than the second distance 22. More specifically, the ratio between the first distance 21, the second distance 22, and the width of the engaging socket 8 is 5:1:4, whereby a design of the present invention can be achieved, which clamps and applies torque to the socket fastener in the counterclockwise direction. This design is used to loosen and remove the socket fastener.

[0042] Please refer to Figure 5 and Figure 10 . The present invention can be implemented in the form of a keyway, square, or other polygonal screwdriver bit. In an embodiment of the present invention, the screwdriver bit body 1 is a keyway-type screwdriver bit body, and the keyway-type screwdriver bit body can transmit torque to the socket fastener via a plurality of protrusions. In an embodiment of the present invention, the screwdriver bit body 1 further includes: a plurality of intermittent side walls 24, as Figures 18 to 22 shown. Each of the plurality of intermittent side walls 24 is a flat surface, and the way it engages the socket fastener is like a traditional screwdriver design. The plurality of intermittent side walls 24 are radially distributed around the rotation axis 16. Moreover, the plurality of intermittent side walls 24 are interspersed between the plurality of side walls 2. The ratio between the plurality of side walls 2 and the plurality of intermittent side walls 24 can be changed to produce different screwdriver bit designs. In an embodiment of the present invention, the plurality of intermittent side walls 24 and the plurality of side walls 2 are intermittently and radially distributed with respect to each other. In an embodiment of the present invention, three intermittent side walls 24 exist for each side wall 2. Such an arrangement allows a coupling feature / coupling teeth, to exist on every other protrusion of each screwdriver bit body 1.

[0043] In an exemplary embodiment of the present invention, a first intermittent side wall 28, a second intermittent side wall 29, and a third intermittent side wall 30 among the plurality of intermittent side walls 24 are interspersed between the relevant side walls among the plurality of side walls 2, as Figure 10As shown. The first intermittent sidewall 28, the second intermittent sidewall 29, and the third intermittent sidewall 30 can be effectively connected to the fastener, but still provide sufficient space to prevent mechanical wear and fatigue. The first intermittent sidewall 28 and the second intermittent sidewall 29 are perpendicular to each other. Such a design forms a 90-degree angle, which can achieve the best effect in certain applications. The third intermittent sidewall 30 is located between at least one engaging cavity 8 of the relevant sidewall and the second intermittent sidewall 29. Thus, in the application of the present invention, the third intermittent sidewall 30 provides mechanical support for at least one engaging cavity 8.

[0044] Providing different configurations of at least one engaging cavity 8 may be mechanically advantageous and can be used as a more preferred embodiment. For example, at least one engaging cavity 8 is presented on a plurality of sidewalls of at least one screwdriver bit body 1. To achieve this purpose, at least one specific sidewall 36 can be a plurality of specific sidewalls. Such a design allows the plurality of specific sidewalls to surround the screwdriver bit body 1 in different patterns. Moreover, at least one engaging cavity 8 can be a plurality of engaging cavities. Thus, each specific sidewall can be appropriately shaped with an engaging cavity 8. Then, each of the plurality of engaging cavities 8 can vertically enter the side surface 5 of a relevant specific sidewall among the plurality of specific sidewalls. Thus, each specific sidewall can form a cavity shape or other shapes by means of one of the plurality of engaging cavities 8.

[0045] To achieve this purpose, the plurality of sidewalls 2 can further include at least one flat sidewall 37. At least one flat sidewall 37 is a sidewall among the plurality of sidewalls 2 that does not have a specific concave cavity feature. At least one flat sidewall 37 can be adjacent to at least one specific sidewall 36. Thereby, the flat sidewall can be located between at least one specific sidewall 36 and can form different configurations of concave and flat sidewalls.

[0046] Please refer to Figure 6 . In an embodiment of the present invention, the present invention further includes a coupling hole 20. The coupling hole 20 can attach the present invention to a male attachment structure of an external torque tool, such as a socket wrench or a screwdriver. The coupling hole 20 extends into the attachment structure body 19 and is relative to the screwdriver bit body 1. The shape of the coupling hole 20 can accommodate the male attachment structure of the socket wrench. The shape of the coupling hole 20 is preferably square because most socket wrenches use a square attachment structure. In this embodiment, the shape of the attachment structure body 19 is preferably cylindrical. In other embodiments, the shapes of the coupling hole 20 and the attachment structure body 19 can vary according to the design of the torque tool and the method of attachment.

[0047] Please refer to Figure 2。In one embodiment of the present invention, the present invention is manufactured as a double-headed screwdriver bit, which can provide clockwise and counterclockwise configurations simultaneously in a single tool. In this embodiment, the screwdriver bit body 1 includes: a first screwdriver bit body 17 and a second screwdriver bit body 18. The cross-section of the attachment structure body 19 is preferably hexagonal. The center of the attachment structure body 19 is located on the rotation axis 11 of the first screwdriver bit body 17 and is distributed along the rotation axis 16 of the first screwdriver bit body 17. Therefore, the rotation axis of the attachment structure body 19 completely overlaps with the rotation axis 16 of the first screwdriver bit body 17. The attachment structure body 19 is connected to the second base surface 15 of the first screwdriver bit body 17. The second screwdriver bit body 18 shares the attachment structure body 19 with the first screwdriver bit body 17, and the second screwdriver bit body 18 is concentric with the first screwdriver bit body 17. Similar to the design of a traditional double-headed screwdriver bit, the second screwdriver bit body 18 is connected to the attachment structure body 19 and is relative to the first screwdriver bit body 17. Similar to the first screwdriver bit body 17, the attachment structure body 19 is connected to the second base surface 15 of the second screwdriver bit body 18. The first screwdriver bit body 17 is used to rotate a socket fastener in the clockwise direction, that is, the first screwdriver bit body 17 is a clockwise-configured screwdriver bit body. Please refer to Figure 3 。The second distance 22 of the first screwdriver bit body 17 is greater than the first distance 21 of the first screwdriver bit body 17. Thus, the additional clamping point of the first screwdriver bit body 17 is adjacent to the first side edge 3 of the first screwdriver bit body 17. The second screwdriver bit body 18 is used to loosen or remove a socket fastener from the counterclockwise direction, that is, the second screwdriver bit body 18 is a counterclockwise-configured screwdriver bit body. Please refer to Figure 4 。The first distance 21 of the second screwdriver bit body 18 is greater than the second distance 22 of the second screwdriver bit body 18. Thus, the additional clamping point of the second screwdriver bit body 18 is adjacent to the second side edge 4 of the second screwdriver bit body 18.

[0048] In one embodiment of the present invention, the double-headed screwdriver bit can benefit from: establishing an elbow between the first screwdriver bit body 17 and the second screwdriver bit body 18, as commonly seen in an Allen wrench or a similar wrench tool. To achieve this purpose, the second screwdriver bit body 18 can be at an attachment angle 38 relative to the first screwdriver bit body 17, as Figure 21 shown. Such a design allows the user to use the first screwdriver bit body 17 as a handle and use the second screwdriver bit body 18 to rotate an external screw.

[0049] Please refer to Figure 5In an embodiment of the present invention, the engaging cavity 8 includes a first cavity region 12 and a second cavity region 13. This embodiment is another configuration of the present invention, which has both clockwise and counterclockwise functions. The first cavity region 12 and the second cavity region 13 are parallel to each other and separated from each other. The first cavity region 12 is adjacent to the first side edge 3 and separated from the first side edge 3, and the second cavity region 13 is adjacent to the second side edge 4 and separated from the second side edge 4. This embodiment allows the user to rotate the present invention clockwise or counterclockwise without removing the present invention from the torque tool, and still has the advantage of additional clamping points. In this embodiment, it is preferred that the present invention includes a plurality of intermittent side walls 24, and the plurality of intermittent side walls 24 are interspersed between the plurality of side walls 2. Thus, in this embodiment, the triangular cross-section can be a plurality of triangular cross-sections arranged along the plurality of side walls 2. Such a design enables the present invention to adapt to various high-stress usage scenarios.

[0050] Please refer to Figure 7 In an embodiment of the present invention, the screwdriver bit is manufactured to have a spherical end. In this embodiment, each side surface 5 of the plurality of side walls 2 includes a convex surface 6 and a concave surface 7. The convex surface 6 and the concave surface 7 form a curved surface. Thus, the screwdriver bit body 1 having the plurality of side walls 2 forms a spherical-like structure. The convex surface 6 is adjacent to the first base surface 14; each convex surface 6 of the plurality of side walls 2 participates in jointly forming the spherical-like structure. The concave surface 7 is adjacent to the convex surface 6 and is opposite to the first base surface 14; each concave surface 7 of the plurality of side walls 2 participates in jointly forming the spherical-like structure; when the screwdriver bit body 1 is engaged with the socket fastener at an angle, the concave surface 7 can provide appropriate clearance. The convex surface 6 and the concave surface 7 are distributed along the rotation axis 16 of the screwdriver bit body 1 (that is, along the length direction of the screwdriver bit body 1), so that the spherical-like structure terminates at one end of the screwdriver bit body 1. In a preferred embodiment of the present invention, the curvature, height, and length of the convex surface 6 are respectively the same as those of the concave surface 7. In a preferred embodiment of the present invention, the engaging cavity 8 extends along the entire length of the convex surface 6 and the concave surface 7. Thus, regardless of the angle between the socket fastener and the screwdriver bit body 1, additional clamping points or clamping teeth are generated on the screwdriver bit body 1.

[0051] Please refer to Figure 10。In an embodiment of the present invention, the present invention is manufactured as a screwdriver bit capable of preventing disassembly. In this embodiment, the present invention includes a locking pin safety hole 23; the locking pin safety hole 23 is complementary in shape to a pin on a unique socket fastener and can be interlocked with this pin. According to this embodiment, a series of unique socket fasteners and unique screwdriver bits can be manufactured, used, and sold. This interlocking design is for safety reasons and can prevent unauthorized persons from using or operating certain socket fasteners. The locking pin safety hole 23 is concentrically located on the rotation axis 16 of the screwdriver bit body 1. Further, the locking pin safety hole 23 extends from the first base surface 14 into the screwdriver bit body 1. The size, depth, and cross-sectional shape of the locking pin safety hole 23 can be changed to meet the needs or specifications of the user.

[0052] Please refer to Figure 11 。In certain embodiments, the present invention further includes some additional features to help the user guide the screwdriver body 1 into the socket fastener. In one embodiment, the present invention further includes a side edge 25; the material between each of the plurality of side walls 2 and the first base surface 14 is chamfered to form the side edge 25. The side edge 25 can help the user lock the screwdriver bit body 1 into the socket fastener. Please refer to Figure 12 。In one embodiment, the present invention is implemented in another design. In this embodiment, the screwdriver bit body 1 tapers from the second base surface 15 towards the first base surface 14. The degree of tapering can be changed according to the needs of the user. Please refer to Figure 22 。The present invention is a screwdriver bit body that tapers from the second base surface 15 towards the first base surface 14, and includes: at least one planar side wall 37, wherein the planar side wall 37 is adjacent to at least one specifically tapered side wall 36. In other words, at least one specifically tapered side wall 36 and at least one planar side wall 37 are not perpendicular to the first base surface 14, as Figure 22 shown. In use, certain embodiments of the present invention are more beneficial for leverage and resistance to mechanical wear. To achieve this purpose, at least one engaging hole 8 and the first side edge 3 of at least one specifically tapered side wall 36 are separated by a first distance 21, as Figure 22 shown. Thus, a clamping point is generated by at least one engaging hole 8 and a side surface 5. The first part 33 of the side surface 5 of at least one specifically tapered side wall 36 is distributed along the first distance 21. Thus, the first distance 21 covers the section of the first part 33. The width 35 of at least one engaging hole 8 is parallel to the side surface 5. Such a design makes the width 35 parallel to the first distance 21. The width 35 can be greater than the first distance 21. In this way, it can be ensured that at least one engaging hole 8 covers a significant part of the effective area of the side surface 5.

[0053] In the present invention, the first portion 33 can have various different shapes so as to have optimal performance under various stresses and usage conditions. To ensure that at least one engaging cavity 8 can have an appropriate shape, the shape of the first portion 33 can be selected from a group that includes: a straight line, a concave line, and a convex line, as Figures 14 to 17 shown. Any selected shape can provide optimal support during use and improve the durability of the present invention.

[0054] The present invention can further benefit from a side surface 5 with a more complex shape or design. To this end, the side surface 5 can further include: a second portion 34, as Figure 22 shown. The second portion 34 is a region of the side surface 5 that is distributed along a second distance 22 such that the second portion 34 is adjacent to a second side edge 4. The at least one engaging cavity 8 and the second side edge 4 of at least one specific side wall 36 are separated by a second distance 22. The second distance 22 represents a space relative to the first distance 21, and this space is between the at least one engaging cavity 8 and the second side edge 4. The second portion 34 of the side surface 5 of the at least one specific side wall 36 is distributed along the second distance 22. Thus, the second distance 22 encompasses the section of the second portion 34. The shape of the second portion 34 can be selected from a group that includes: a straight line, a concave line, and a convex line. Thus, the second portion 34 allows the present invention to optimally adapt to potential mechanical fatigue. Moreover, the at least one engaging cavity 8 tapers in a direction perpendicular to the axis of rotation and from a position adjacent to the first distance 21 or the second distance 22 towards a side edge. Such a design allows the present invention to optimally apply force during rotation. The first distance 21 can be equal to or not equal to the second distance 22. The width distance of the planar side wall 37 can be less than, equal to, or greater than the width distance of the specific side wall 36. The widths of the first portion 33 and the second portion 34 decrease gradually from the first base surface 14 towards the second base surface 15. Please refer again to Figure 22。In an embodiment of the present invention, preferably: the overall cross-section 9 of the engaging socket 8 is a semi-circular profile. Furthermore, this semi-circular profile is recessed inward from a direction perpendicular to the line connecting the first side edge 3 and the second side edge 4. This semi-circular profile can ensure that there are no or few high stress points on the screwdriver bit body 1. Therefore, the overall lifespan of the tool is increased. In a preferred embodiment of the present invention, the side surface 5 of at least one specific side wall 36 is connected to the side surface 5 of at least one flat side wall 37 at an obtuse angle. The attachment body 19 enables the present invention to be attached to an external torque tool, whereby torque can be applied to the socket fastener via the screwdriver bit body 1. The attachment body 19 is distributed along a rotation axis 16 of the screwdriver bit body 1, and surrounds the rotation axis 16, and its center is located on the rotation axis 16. Therefore, the rotation axis of the attachment body 19 coincides with the rotation axis 16 of the screwdriver bit body 1. Moreover, the attachment body 19 is connected to the second base surface 15.

[0055] In many situations, the user may wish to apply torque to an external screw from different angles. To achieve this purpose, the second part 34 of the side surface 5 of at least one specific side wall 36 is at an angle relative to the first part 33 of the side surface 5 of at least one specific side wall 36, as Figure 22 shown. This design allows holes of other shapes on the external screw to be accurately filled by the present invention. This design is also within the scope of the present invention.

[0056] In other embodiments, the present invention can be implemented in the form of a socket for tightening or loosening bolts or other similar fasteners. To achieve this purpose, the screwdriver bit body 1 is implemented in the form of a cavity penetrating a cylinder, similar to a traditional socket design.

[0057] The present invention has been illustrated by way of examples above. However, it should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. Any modification or variation that does not deviate from the spirit of the present invention will still be included within the scope of the present invention.

Claims

1. A multi-grip screwdriver device, comprising: At least one screwdriver bit body, and An attachment body, wherein The at least one screwdriver bit body further comprises: a plurality of side walls, at least one flat side wall, a first base surface, a second base surface, and at least one engagement cavity; The plurality of side walls further comprises: a first side edge, a second side edge, and a side surface; The plurality of side walls radially surround a rotation axis of the at least one screwdriver bit body; The first side edge and the second side edge are opposite to each other across the side surface; The first side edge and the second side edge have a sharp-corner shape; The at least one engagement cavity vertically indents into the side surface of at least one specific side wall of the plurality of side walls; The at least one flat side wall is adjacent to the specific side wall; The at least one engagement cavity extends on the at least one screwdriver bit body from the first base surface towards the second base surface; An overall cross-section of the engagement cavity is parallel to the first base surface and the second base surface; The attachment body is connected to the second base surface.

2. The multi-grip screwdriver device according to claim 1, wherein the at least one screwdriver bit body tapers from the first base surface towards the second base surface.

3. The multi-grip screwdriver device according to claim 1, wherein the at least one screwdriver bit body tapers from the second base surface towards the first base surface.

4. The multi-grip screwdriver device according to claim 1, wherein The at least one engagement cavity and the first side edge of the at least one specific side wall are separated by a first distance; A first portion of the side surface of the at least one specific side wall is distributed along the first distance; The shape of the first portion can be selected from a group, which includes: a straight line, a concave line, and a convex line.

5. The multi-grip screwdriver device according to claim 1, wherein The at least one engagement cavity and the second side edge of the at least one specific side wall are separated by a second distance; A second portion of the side surface of the at least one specific side wall is distributed along the second distance; The shape of the second portion can be selected from a group, which includes: a straight line, a concave line, and a convex line.

6. The multi-grip screwdriver device according to claim 1, wherein A second portion of the side surface of the at least one specific side wall is at an angle with respect to a first portion of the side surface of the at least one specific side wall.

7. The multi-grip screwdriver device according to claim 1, wherein The at least one engagement cavity and the first side edge of the at least one specific side wall are separated by a first distance; The at least one engagement cavity and the second side edge of the at least one specific side wall are separated by a second distance; The first distance is equal to the second distance.

8. The multi-grip screwdriver device according to claim 1, wherein The at least one screwdriver bit body further comprises: a plurality of intermittent side walls; The plurality of intermittent side walls radially surround the rotation axis; The plurality of intermittent side walls are interspersed between the plurality of side walls.

9. The multi-grip screwdriver device according to claim 1, wherein an edge between each of the plurality of side walls and the first base surface is chamfered.

10. The multi-grip-point screwdriver device according to claim 1, wherein the at least one engaging socket tapers from the first base surface to the second base surface.

Images