Advanced gripping device

Abstract

The invention discloses an advanced gripping device which can effectively transmit torsion to a socket fastener. The screwdriver bit comprises at least one screwdriver bit body. The screwdriver head body further comprises a plurality of side walls, a first base face and a second base face. The plurality of side walls radially surround a rotational axis of the screwdriver bit body. Each side wall comprises a first side edge, a second side edge, a first side face, a second side face and at least one combination hole. The coupling cavity creates an additional clamping point, thereby preventing sliding between the screwdriver bit body and the socket fastener. The coupling pocket is recessed into the screwdriver bit body from the first base surface to the second base surface. The coupling pocket extends on the screwdriver bit body from the first base plane toward the second base plane. The combination cavity is provided with a protruding part between the first cavity area and the second cavity area.

Description

Technical Field

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

[0002] Hexagonal bolts, nuts, screws, and other similar threaded fasteners are used to fasten multiple parts together by combining with complementary threads (usually called female threads). The structure of such fasteners generally includes: a cylindrical shaft with an external thread, and a head at the end of the shaft. This external thread combines with a complementary female thread to secure the fastener and the related parts at the same time, where the female thread is usually formed by tapping into a hole or nut. The fastener receives an external torque through its head and is turned or driven into the female thread. The shape of the head is made to allow an external tool, such as a wrench, to apply torque to the fastener to rotate the fastener to some extent to engage with the complementary female thread. Such fasteners are simple, inexpensive, and very effective, and are therefore widely used in modern society.

[0003] One of the common problems with these fasteners is that the tool often slips on the head, whether the fastener is male or female. This can be caused by: worn tool or fastener, rust on the tool or fastener, over-tightening the fastener, or damage to the fastener head. Summary of the Invention

[0004] The present invention is a screwdriver bit design that can substantially eliminate slippage. The design of the present invention includes several parts. The overall action of these parts can engage the head of the fastener, thereby effectively transferring torque between the screwdriver bit and the fastener head. Traditional bolt drivers may use tools and drill holes that are not originally necessary. The present invention avoids these problems. With the development of electric screwdrivers and electric drills, people have commonly used power 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 in a clockwise or counterclockwise manner 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0007] Figure 3 yes Figure 2 Front view of the embodiment.

[0008] Figure 4 yes Figure 2 Rear view of the embodiment.

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

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

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

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

[0013] Figure 9 yes Figure 8 Front view of the embodiment.

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

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

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

[0017] Figure 13 is a front view showing the Figure 2 In another embodiment related to the embodiment, the overall cross-section of the combining cavity is a triangular cross-section.

[0018] Figure 14 is a front view showing the Figure 2 In another embodiment related to the embodiment, the overall cross-section of the combining cavity is a triangular cross-section.

[0019] Figure 15 is a front view showing the Figure 2 In another embodiment related to the embodiment, the overall cross-section of the combining cavity is a triangular cross-section.

[0020] Figure 16 is a front view showing the Figure 15 In another embodiment related to the embodiment, different portions of one side wall are concave or convex.

[0021] Figure 17 is a front view showing the Figure 15 In another embodiment related to the embodiment, different portions of one side wall are convex or concave.

[0022] Figure 18is a front view showing the Figure 15 In another embodiment related to the embodiment, the coupling cavity is configured between the flat sidewalls.

[0023] Figure 19 is a front view showing the Figure 15 In another embodiment related to the embodiment, the coupling cavity is configured between the flat sidewalls.

[0024] Figure 20 is a front view showing the Figure 15 In another embodiment related to the embodiment, the coupling cavity is configured between the flat sidewalls.

[0025] Figure 21 It is a stereogram that shows Figure 2 In another embodiment related to the embodiment, the double-headed screwdriver bit bodies are relative to each other at an angle.

[0026] Figure 22 is a front view showing the Figure 15 In another embodiment related to the embodiment, the coupling cavity is configured between the flat sidewalls.

[0027] Figure 23 It is a perspective view showing a double-sided embodiment of the present invention, wherein the intermittent side walls are rounded and the tuberculosis cavity is acute.

[0028] Figure 24 It is a front view showing a double-sided embodiment of the present invention, wherein the intermittent side walls are rounded and the tuberculosis cavity is acute.

[0029] Figure 25 It is a perspective view showing a double-sided embodiment of the present invention, wherein the intermittent side walls are flat and the tuberculosis cavities are rounded and blunt.

[0030] Figure 26 It is a front view showing a double-sided embodiment of the present invention, wherein the intermittent side walls are flat and the tuberculosis cavity is rounded and blunt.

[0031] Figure 27 is a perspective view showing an embodiment of the present invention, which has an oval-shaped coupling cavity.

[0032] Figure 28 is a front view showing an embodiment of the present invention having an oval coupling cavity.

[0033] Figure 29 is a front view, drawn in accordance with at least one embodiment of the present invention.

[0034] Figure 30is a front view, drawn in accordance with at least one embodiment of the present invention.

[0035] Figure 31 is a front view, drawn in accordance with at least one embodiment of the present invention. DETAILED DESCRIPTION

[0036] First of all, it should be specially pointed out that the illustrations used in this specification are only used to illustrate certain embodiments of the present invention, and the scope of the present invention is not limited by these illustrations.

[0037] The present invention relates to accessories for torque tools, and more particularly to a multi-clamping point screwdriver head, which is a screwdriver head or screw driving head. Compared to other conventional screwdriver heads of similar size, the present invention can apply greater torque to fasteners without damaging the fastener head or the screwdriver head tool. The effectiveness of the present invention is achieved by having an engaging structure with multiple features, which enable the engaging structure to effectively clamp the head of the fastener. The present invention is a screwdriver head that is compatible with a variety of torque tools, including: conventional electric drills, screwdrivers that can accommodate screwdriver heads, socket wrenches, socket drivers, but these torque tools are not limited to the above-mentioned torque tools.

[0038] Please refer to Figure 1, which is the simplest embodiment of the present invention. In this embodiment, the present invention comprises at least: at least one screwdriver head body 1, and an attachment body 19. The screwdriver head body 1 is a handle rod that can be combined with a socket fastener, such as a socket screw and a socket screw, so as to quickly apply torque to the socket fastener. The screwdriver head body 1 further comprises: a plurality of side walls 2, a first base surface 14, a second base surface 15, and at least one combining hole 8. At least one combining hole 8 is recessed into at least one screwdriver head 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 speaking, the screwdriver head body 1 is a prism made of high-strength metal. A plurality of side walls 2 are combined with the socket fastener and clamp the socket fastener so as to effectively transfer torque from the torque tool to the socket fastener. The first base surface 14 and the second base surface 15 oppose each other across the plurality of side walls 2. 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 flat surface 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 portion of the side surface 5 extending along a first distance 21 to a position proximate to the first side edge 3. The attachment body 19 allows the present invention to be attached to an external torque tool, thereby applying torque to the socket fastener via the screwdriver bit body 1. The attachment body 19 is arranged along and around a rotational axis 16 of the screwdriver bit body 1, with its center located on the rotational axis 16. Therefore, the rotational axis of the attachment body 19 overlaps with the rotational axis 16 of the screwdriver bit body 1. Furthermore, 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 so that it can be coupled to 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 coupling hole 8 further includes: a curved area, and a straight area. In other embodiments of the present invention, the coupling hole 8 may have a cross-section of other shapes. Other cross-section shapes include, but are not limited to: a square, a rectangular, and a partially circular cross-section. Furthermore, the shape of each area of ​​the coupling hole 8 can be selected from a group including: a straight line, a concave line, and a convex line. The combined use or individual 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 one embodiment of the present invention, the overall cross-section 9 of the coupling hole 8 is a triangular cross-section.When torque is applied, at least one of the coupling holes 8 is subjected to pressure and strain, and the triangular cross-section provides a large space to relieve the stress. Furthermore, the 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 case, during the application of torque, the stress is captured by the at least one coupling hole 8. In other embodiments of the present invention, at least one coupling hole 8 has both a curved area and a straight area. This design allows the coupling hole 8 to interact optimally with different fastener cross-sections, different materials, and different stress levels. Please refer to. Figure 27 and Figure 28 . In one embodiment of the present invention, at least one coupling cavity 8 has an elliptical cross-section. This partially elliptical or semi-elliptical cross-section can provide greater strength than other embodiments (such as a semicircular coupling cavity 8 cross-section). In an elliptical cross-section configuration, at least one coupling cavity 8 with a semi-elliptical cross-section is wider and shallower than at least one coupling cavity 8 with a semicircular cross-section, which can provide additional strength to the screwdriver head body 1 and provide more stress points along the side 5, especially when force is applied to the side edge. In this embodiment, the first portion 33 and the second portion 34 of the side can be together on a straight line. In other embodiments of the elliptical cross-section configuration, the cross-section of at least one coupling cavity 8 can be a combination of curves, straight lines, and angles, such as a trapezoid. In a preferred embodiment of the present invention, any combination of curves and straight lines forming the cross-section of at least one coupling cavity 8 are connected to each other at obtuse angles, so that at least one coupling cavity 8 is completely a concave shape.

[0039] Certain embodiments are more advantageous in terms of leverage and mechanical wear resistance during use. To achieve this, at least one coupling cavity 8 and the first side edge 3 of at least one specific side wall 36 are spaced apart by a first distance 21, such as Figure 9 、 Figure 18 、 Figure 19 、 Figure 21 ,and Figure 22 As shown. Thus, a clamping point is created by a side surface 5 and at least one coupling cavity 8. A first portion 33 of the side surface 5 of at least one specific side wall 36 is distributed along a first distance 21. Thus, the first distance 21 covers a section of the first portion 33. The width 35 of the at least one coupling cavity 8 is parallel to the side surface 5. This design ensures that the width 35 is parallel to the first distance 21. The width 35 can be greater than the first distance 21. This ensures that the at least one coupling cavity 8 covers a significant portion of the effective area of ​​the side surface 5.

[0040] In the present invention, the first portion 33 can have various shapes so as to have the best performance under various stress and usage conditions. In order to ensure that at least one coupling cavity 8 has an appropriate shape, the shape of the first portion 33 can be selected from a group including: a straight line, a concave line, and a convex line, such as Figures 14 to 17 Any shape selected will provide optimal support during use and improve the durability of the invention.

[0041] The side surface 5 can also benefit from a more complex shape or design. To achieve this, the side surface 5 can further include: a second portion 34, such as Figures 14 to 20 and Figure 28 As shown. The second portion 34 is a region of the side surface 5 that extends along a second distance 22, such that the second portion 34 is adjacent to a second side edge 4. The at least one coupling cavity 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, between the at least one coupling 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 extends along the second distance 22. Thus, the second distance 22 encompasses a portion of the second portion 34. The shape of the second portion 34 can be selected from the group consisting of 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. Furthermore, the at least one coupling cavity 8 tapers in a direction perpendicular to the axis of rotation, from a position adjacent to the first distance 21 or the second distance 22 toward a side edge. This design allows the present invention to optimally apply force during rotation. A side geometric plane extends along the side surface 5 and is adjacent to the at least one coupling cavity 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 spaced away from the side edge geometric plane.

[0042] In many situations, users may wish to apply torque to an external screw from various angles. To achieve this, the second portion 34 of the side 5 of at least one specific side wall 36 is angled relative to the first portion 33 of the side 5 of at least one specific side wall 36. This design allows the present invention to accurately fill holes of other external screw shapes, and such designs are also within the scope of the present invention.

[0043] The cross section of this triangle may further include: a plurality of vertices 27, such as Figure 15As shown, the plurality of vertices 27 are associated with the loci of the corners of the triangular cross-section. Each of the plurality of vertices 27 can be a rounded corner. This design prevents point stress accumulation at the plurality of vertices 27 without significantly reducing the space required to effectively eliminate fatigue effects.

[0044] In many cases, depending on the intensity of the torsional stress and the shape of the bolt or device, it may be more advantageous to allow for a small deviation from a strictly triangular cross-section. To achieve better efficiency in certain situations, the triangular cross-section may include: a plurality of vertices 31, and a pair of extensions 32, such as Figure 16 and Figure 17 As shown. Multiple vertices 31 are related to the trajectory of the corners of the triangular section. Multiple vertices 31 can be regarded as two leading edge elements along the first side edge 3 and the second side edge 4, or 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 represents an edge connecting multiple vertices 31. That is, this pair of extensions 32 connects each of the multiple vertices 31. The shape of each of the pair of extensions 32 can be selected from a group, which includes: a straight line, a concave line, and a convex line. The shape of multiple vertices 31, a pair of extensions 32 or a recess base element can be a rounded corner or an angled shape. Such a design allows the pair of extensions 32 to better adapt to different torsional stresses and prevent fatigue from causing adverse wear on the screwdriver head. Other applications may also require modifications to the edges around the triangular section. To achieve this purpose, the side 5 may further include: a first part 33, and a second part 34, such as Figure 16 and Figure 17 As shown. The first portion 33 and the second portion 34 are related to the edge of the surrounding triangular cross section. The first portion 33 is distributed along a first distance 21, so that the first portion 33 is adjacent to the first side edge 3. Furthermore, the second portion 34 is distributed along a second distance 22, so that the second portion 34 is adjacent to the second side edge 4. The shape that can be selected as the first portion 33 and the second portion 34 can be a rounded corner or an angled shape, such as Figure 16 and Figure 17 As shown. It is most advantageous for the first portion 33 and the second portion 34 to have opposite curvatures, for example, one having a concave shape and the other having a convex shape. This can most effectively eliminate the periodic stresses acting on the present invention. Further modifications can also be made to the first side edge 3 and the second side edge 4 to form a rounded or angled side edge.

[0045] 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 head body 1, thereby producing 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 one embodiment of the present invention, the number of the plurality of side walls 2 is 6, which produces a hexagonal screwdriver head body 1. In another embodiment of the present invention, the number of the plurality of side walls 2 is 4.

[0046] The side surface 5 physically bears against the socket fastener, particularly the side wall of the socket fastener head. The first side edge 3 and the second side edge 4 oppose each other across the side surface 5. The first side edge 3 and the second side edge 4 of each of the plurality of side walls 2 form a corner of the screwdriver bit body 1, whether viewed from a top or bottom perspective. A coupling cavity 8 extends vertically from the plurality of side walls 2 into the side surface 5 of at least one particular side wall 36, thereby creating an additional clamping point / clamping tooth on the side surface 5. In other embodiments of the present invention, the clamping point is created by the coupling cavity 8 and an adjacent edge, which may be the first side edge 3 or the second side edge 4, particularly the side edge closest to the coupling cavity 8. Furthermore, the coupling cavity 8 extends from the first base surface 14 to the second base surface 15 on the screwdriver bit body 1. This ensures that the additional clamping point extends along the length of the screwdriver bit body 1, thereby achieving maximum clamping force between the screwdriver bit body 1 and the socket fastener. In order to achieve this purpose more effectively, an entire cross section 9 of the coupling cavity 8 is parallel to the first base surface 14 and the second base surface 15. In some embodiments of the present invention, at least one coupling cavity 8 tapers from the first base surface 14 to the second base surface 15, such as Figure 11 As shown. In this embodiment, at least one coupling hole 8 is tapered 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. In this way, the shape of at least one coupling hole 8 can be appropriately changed to meet the needs of the user. In one embodiment of the present invention, the overall cross-section 9 of the coupling hole 8 is a semicircular cross-section, such as Figure 3 As shown. Furthermore, this semicircular cross section is concave inward from a direction perpendicular to the connection between the first side edge 3 and the second side edge 4. This semicircular cross section ensures that there are no or very few high stress points on the screwdriver head body 1. Therefore, the overall life of the tool is improved. In other embodiments of the present invention, the overall cross section 9 of the coupling cavity 8 is a triangular cross section, such as Figure 13 and Figure 14As shown. Furthermore, this triangular cross-section is concave inwardly from a direction perpendicular to the connection between the first side edge 3 and the second side edge 4. Other cross-sections that can be used for the coupling cavity 8 include, but are not limited to: a partial square or semi-square cross-section, a partial rectangular or semi-rectangular cross-section, a partial elliptical or semi-elliptical cross-section, or a partial oval or semi-oval cross-section.

[0047] Please refer to Figure 8 and Figure 9 In one embodiment of the present invention, the overall cross-section 9 of the coupling cavity 8 includes: a curved area 10, and a straight area 11. In this embodiment, the present invention is implemented in the form of an extraction screwdriver bit, wherein the present invention is designed to extract damaged fasteners, damaged screws, damaged bolts, and other similar objects. In this embodiment, the coupling cavity 8 is given a special shape to form sharp engaging teeth, which can clamp the corners of the socket fastener, allowing material to enter the coupling 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 the material. The clamping force of the present invention is particularly effective for worn or damaged fastener sockets. More specifically, the curved area 10 is a semicircular curve adjacent to the first side edge 3. The curved area 10 is adjacent to the first portion 33 of the side 5 of at least one specific side wall 36 and is relative to the first side edge 3. This design allows the first portion 33 to effectively position the curved area 10 relative to the first distance 21. The straight region 11 is adjacent to the curved region 10 and opposite the first portion 33. The straight region 11 guides a portion of the socket fastener to abut against the engaging teeth. Thus, the straight region 11 extends from the curved region 10 to the second side edge 4. More specifically, the straight region 11 begins at the curved region 10 and ends at the second side edge 4.

[0048] Please refer to Figure 11 In one embodiment of the present invention, the coupling cavity 8 is located in the center of the side surface 5. More specifically, the coupling 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 in the center, the first distance 21 is equal to the second distance 22. Figure 15 As shown. Such a design enables the coupling cavity 8 to clamp the socket fastener and move the torsional stress toward or away from the side corners of the fastener to enhance the meshing function and prevent the fastener from becoming blunt, so as to most effectively transmit the torsional force and minimize the possibility of slippage. Furthermore, this embodiment can rotate the socket fastener in a clockwise or counterclockwise direction. In one 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 shown in FIG. Figure 19 、 Figure 22 ,and Figure 28 shown.

[0049] In one embodiment of the present invention, the ratio between the first distance 21, the second distance 22, and the width of the coupling cavity 8 can be varied to achieve a specific clockwise or counterclockwise design. In one embodiment, the present invention is configured as 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 coupling cavity 8 is 1:5:4. This allows the present invention to clamp and apply torque to the socket fastener in a clockwise direction. This design is used to screw in and secure the socket fastener. In one embodiment, the present invention is configured as 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 coupling cavity 8 is 5:1:4. This allows the present invention to clamp and apply torque to the socket fastener in a counterclockwise direction. This design is used to loosen and remove the socket fastener.

[0050] 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 head. In one embodiment of the present invention, the screwdriver head body 1 is a keyway type screwdriver head body, and the keyway type screwdriver head body can transmit torque to the socket fastener via a plurality of protrusions. In one embodiment of the present invention, the screwdriver head body 1 further includes: a plurality of intermittent side walls 24, such as Figures 18 to 22 As shown. Each of the plurality of intermittent side walls 24 is a flat surface that engages with the socket fastener in a manner similar to a conventional screwdriver design. The plurality of intermittent side walls 24 are radially distributed around the rotation axis 16. Furthermore, the plurality of intermittent side walls 24 are interspersed between the plurality of side walls 2. The ratio of the plurality of side walls 2 and the plurality of intermittent side walls 24 can be changed to produce different screwdriver head designs. In one embodiment of the present invention, the plurality of intermittent side walls 24 and the plurality of side walls 2 are intermittently radially distributed with respect to each other. In one embodiment of the present invention, three intermittent side walls 24 are present on each side wall 2. Such a layout allows a coupling feature / coupling tooth to be present on every other protrusion of each screwdriver head body 1.

[0051] 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, such as Figure 10As shown. The first intermittent side wall 28, the second intermittent side wall 29, and the third intermittent side wall 30 can be effectively connected to the fastener, but still provide sufficient space to prevent mechanical wear and fatigue. The first intermittent side wall 28 and the second intermittent side wall 29 are perpendicular to each other. This design forms a 90-degree angle, which can have the best effect in certain applications. The third intermittent side wall 30 is located between at least one coupling cavity 8 of the relevant side wall and the second intermittent side wall 29. In this way, in the application of the present invention, the third intermittent side wall 30 provides mechanical support for at least one coupling cavity 8.

[0052] Providing different configurations of at least one combining hole 8 may be mechanically more advantageous and may be a more preferred embodiment, for example, presenting at least one combining hole 8 on multiple side walls of at least one screwdriver head body 1. To achieve this purpose, at least one specific side wall 36 may be multiple specific side walls. Such a design allows multiple specific side walls to surround the screwdriver head body 1 in different configurations. Furthermore, at least one combining hole 8 may be multiple combining holes. In this way, each specific side wall can be appropriately shaped with a combining hole 8. Then, each of the multiple combining holes 8 can vertically enter the side surface 5 of a corresponding specific side wall among the multiple specific side walls. Thus, each specific side wall can be formed into a hole shape or other shape through one of the multiple combining holes 8.

[0053] To achieve this, the plurality of sidewalls 2 may further include at least one flat sidewall 37. The at least one flat sidewall 37 is a sidewall among the plurality of sidewalls 2 that does not have a specific recessed feature. The at least one flat sidewall 37 may be adjacent to at least one specific sidewall 36. Thus, a flat sidewall may be located between at least one specific sidewall 36, and various configurations of recessed and flat sidewalls may be formed.

[0054] Please refer to Figure 6 . In one embodiment of the present invention, the present invention further includes a coupling hole 20. The coupling hole 20 allows the present invention to be attached 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 head body 1. The shape of the coupling hole 20 can accept 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 depending on the design of the torque tool and the method of attachment.

[0055] Please refer to Figure 2. In one embodiment of the present invention, the present invention is manufactured as a double-headed screwdriver head that can provide both clockwise and counterclockwise configurations in a single tool. In this embodiment, the screwdriver head body 1 includes: a first screwdriver head body 17 and a second screwdriver head body 18. The cross-section of the attachment structure body 19 is preferably hexagonal. The center of the attachment structure body 19 is located at the rotation axis 11 of the first screwdriver head body 17, and is distributed along the rotation axis 16 of the first screwdriver head body 17. Therefore, the rotation axis of the attachment structure body 19 completely overlaps with the rotation axis 16 of the first screwdriver head body 17. The attachment structure body 19 is connected to the second base surface 15 of the first screwdriver head body 17. The second screwdriver head body 18 shares the attachment structure body 19 with the first screwdriver head body 17, and the second screwdriver head body 18 is concentric with the first screwdriver head body 17. Similar to the design of a conventional double-headed screwdriver head, the second screwdriver head body 18 is connected to the attachment structure body 19 and is opposite to the first screwdriver head body 17. Similar to the first screwdriver head body 17, the attachment structure body 19 is connected to the second base surface 15 of the second screwdriver head body 18. The first screwdriver head body 17 is used to rotate the socket fastener in a clockwise direction, that is, the first screwdriver head body 17 is a clockwise configured screwdriver head body. Please refer to Figure 3 The second distance 22 of the first screwdriver head body 17 is greater than the first distance 21 of the first screwdriver head body 17. Thus, the additional clamping point of the first screwdriver head body 17 is adjacent to the first side edge 3 of the first screwdriver head body 17. The second screwdriver head body 18 is used to loosen or remove the socket fastener in a counterclockwise direction, that is, the second screwdriver head body 18 is a counterclockwise configured screwdriver head 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 . In this way, 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 .

[0056] In one embodiment of the present invention, a double-ended screwdriver bit can be advantageously provided with an elbow between the first screwdriver bit body 17 and the second screwdriver bit body 18, as is commonly found in hexagonal wrenches or similar wrench tools. To achieve this, the second screwdriver bit body 18 can be attached at an angle 38 relative to the first screwdriver bit body 17, such as Figure 21 Such a design allows the user to use the first screwdriver head body 17 as a handle and the second screwdriver head body 18 to rotate an external screw.

[0057] Please refer to Figure 5In one embodiment of the present invention, the coupling cavity 8 includes a first cavity 12 and a second cavity 13. This embodiment is another configuration of the present invention, providing both clockwise and counterclockwise rotation. The first cavity 12 and the second cavity 13 are parallel to and spaced apart from each other. The first cavity 12 is adjacent to and spaced apart from the first side edge 3, while the second cavity 13 is adjacent to and spaced apart from the second side edge 4. This embodiment allows the user to rotate the present invention clockwise or counterclockwise without removing it from the torque tool, while still providing the advantage of additional clamping points. The first cavity 12 and the second cavity 13 can intersect or be spaced apart from each other. An intermediate support surface 53 is located between the first cavity 12 and the second cavity 13, or at the intersection of the first cavity 12 and the second cavity 13. The intermediate support surface 53 can be colinear with the side surface 5, but is not necessarily colinear with the side surface 5. The present invention is not limited to at least one coupling cavity 8 having only one first cavity 12 and one second cavity 13. In some embodiments, in addition to a first cavity 12 and a second cavity 13, the at least one coupling cavity 8 may include more cavity portions. In this embodiment, the present invention preferably includes multiple intermittent sidewalls 24, interspersed between the multiple sidewalls 2. Thus, in this embodiment, the triangular cross-section may be a plurality of triangular cross-sections arranged along the multiple sidewalls 2. This design allows the present invention to adapt to various high-stress applications.

[0058] Please refer to Figure 7 In one embodiment of the present invention, the present invention is manufactured into a screwdriver head having a spherical end point. 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 head body 1 having the plurality of side walls 2 forms a spherical 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 forming the spherical structure. The concave surface 7 is adjacent to the convex surface 6 and relative to the first base surface 14; each concave surface 7 of the plurality of side walls 2 participates in forming the spherical structure; when the screwdriver head body 1 is coupled to 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 head body 1 (that is, distributed along the length of the screwdriver head body 1), so that the spherical structure ends at one end of the screwdriver head 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 the curvature, height, and length 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 gripping points or gripping teeth are created on the screwdriver bit body 1.

[0059] Please refer to Figure 10 . In one embodiment of the present invention, the present invention is manufactured into a screwdriver head that is tamper-proof. In this embodiment, the present invention includes a locking pin safety hole 23; the locking pin safety hole 23 is complementary to the shape of the pin on a unique socket fastener and can be interlocked with the pin. According to this embodiment, a series of unique socket fasteners and unique screwdriver heads can be manufactured, used, and sold. This interlocking design is for security reasons and can prevent unauthorized people from using or operating certain socket fasteners. The locking pin safety hole 23 is concentrically located on the rotation axis 16 of the screwdriver head body 1. Furthermore, the locking pin safety hole 23 extends from the first base surface 14 into the screwdriver head body 1. The size, depth, and cross-sectional shape of the locking pin safety hole 23 can be changed to suit the needs or specifications of the user.

[0060] Please refer to Figure 11 In some embodiments, the present invention further includes 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 head 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 head body 1 gradually tapers from the second base surface 15 to 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 head body that tapers from the second base surface 15 to the first base surface 14, comprising: at least one planar side wall 37, wherein the planar side wall 37 is adjacent to at least one gradually tapering specific side wall 36. In other words, the at least one specific side wall 36 and the at least one planar side wall 37 are not perpendicular to the first base surface 14, as shown in FIG. Figure 22 In use, certain embodiments of the present invention are more advantageous in terms of leveraging and resistance to mechanical wear. To achieve this, at least one coupling cavity 8 and the first side edge 3 of at least one specific side wall 36 are spaced apart by a first distance 21, as shown. Figure 22 As shown. Thus, a clamping point is created by at least one coupling cavity 8 and one side surface 5. A first portion 33 of the side surface 5 of at least one specific side wall 36 is distributed along the first distance 21. Thus, the first distance 21 covers a section of the first portion 33. The width 35 of the at least one coupling cavity 8 is parallel to the side surface 5. This design ensures that the width 35 is parallel to the first distance 21. The width 35 can be greater than the first distance 21. This ensures that the at least one coupling cavity 8 covers a significant portion of the effective area of ​​the side surface 5.

[0061] In the present invention, the first portion 33 can have various shapes so as to have the best performance under various stress and usage conditions. In order to ensure that at least one coupling cavity 8 has an appropriate shape, the shape of the first portion 33 can be selected from a group including: a straight line, a concave line, and a convex line, such as Figures 14 to 17 Any shape selected will provide optimal support during use and improve the durability of the invention.

[0062] The present invention can also benefit from a side surface 5 having a more complex shape or design. To achieve this purpose, the side surface 5 can further include: a second portion 34, such as Figure 22 As shown. The second portion 34 is an area of ​​the side surface 5, extending along a second distance 22 such that the second portion 34 is adjacent to a second side edge 4. The at least one coupling cavity 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, between the at least one coupling 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 extends along the second distance 22. Thus, the second distance 22 encompasses a portion of the second portion 34. The shape of the second portion 34 can be selected from the group consisting of 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. Furthermore, the at least one coupling cavity 8 tapers in a direction perpendicular to the axis of rotation, from a position adjacent to the first distance 21 or the second distance 22 toward a side edge. This design allows the present invention to optimally apply force during rotation. The first distance 21 can be equal to or different from the second distance 22. The width of the planar sidewall 37 can be less than, equal to, or greater than the width of the specific sidewall 36. The width of the first portion 33 and the width of the second portion 34 gradually decrease from the first base surface 14 to the second base surface 15. Figure 22In one embodiment of the present invention, it is preferred that the overall cross-section 9 of the coupling cavity 8 is a semicircular cross-section. Furthermore, this semicircular cross-section is recessed inwardly from a direction perpendicular to the connection between the first side edge 3 and the second side edge 4. This semicircular cross-section ensures that there are no or very few high stress points on the screwdriver bit body 1. Therefore, the overall life of the tool is improved. 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 planar side wall 37 at an obtuse angle. The attachment body 19 allows 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, with its center located on the rotation axis 16. Therefore, the rotation axis of the attachment body 19 overlaps with the rotation axis 16 of the screwdriver bit body 1. Furthermore, the attachment body 19 is connected to the second base surface 15.

[0063] In many situations, the user may want to apply torque to an external screw from different angles. To achieve this, the second portion 34 of the side 5 of at least one specific side wall 36 is at an angle relative to the first portion 33 of the side 5 of at least one specific side wall 36, such as Figure 22 As 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.

[0064] Please refer to Figures 23 to 26 As described in the aforementioned embodiments of the present invention, the advanced gripping device of the present invention includes at least one screwdriver bit body 1 and an attachment body 19. The at least one screwdriver bit body 1 further includes a plurality of sidewalls 2, a plurality of intermittent sidewalls 24, a first base surface 14, and a second base surface 15. The plurality of sidewalls 2 and the plurality of intermittent sidewalls 24 can be radially distributed around the rotation axis 16 of the at least one screwdriver bit body 1 in any number. Figures 23 to 26 The embodiment shown is a hexagonal configuration. Each of the plurality of side walls 2 further comprises: a first side edge 3, a second side edge 4, at least one side surface 5, and at least one coupling hole 8. The first side edge 3 and the second side edge 4 are located at opposite ends of the side wall 2, and the coupling hole 8 extends from the first base surface 14 to the second base surface 15 on the screwdriver head body 1. In a preferred embodiment of the present invention, at least one coupling hole 8 is rounded with one or more radii, such as Figure 25 and Figure 26 Please refer to Figure 23 and Figure 24At least one of the coupling holes 8 may be of a sharp angle and have one or more corner regions 63. In this preferred embodiment, the first base surface 14 is a flat region. However, in other embodiments, the first base surface 14 may be of a rounded or pointed shape.

[0065] Referring to the previously described embodiment, the side surface 5 further includes a first side surface 51 and a second side surface 52. The first side surface 51 may be adjacent to the first side edge 3, and the second side surface 52 may be adjacent to the second side edge 4. At least one coupling cavity 8 may be located between the first side surface 51 and the second side surface 52; the first side surface 51 connects the at least one coupling cavity 8 to the first side edge 3, and the second side surface 52 connects the at least one coupling cavity 8 to the second side edge 4. The coupling cavity is recessed inward relative to the first side surface 51 and the second side surface 52. Unlike the previously disclosed embodiment of the present invention, the first side surface 51 and the second side surface 52 are spaced apart from each other rather than collinear. The first side edge 3 and the second side edge 4 are the points on each side wall 2 farthest from the rotation axis 16. A first width distance 64 is the distance from the first side edge 3 across the coupling cavity 8 to the second side edge 4. A second width distance 65 is the distance from the first side edge 3 across the intermittent side wall 24 to the second side edge 4. In a preferred embodiment of the present invention, the first width distance 64 is greater than the second width distance 65.

[0066] More specifically, the first side 51 and the second side 52 are separated on either side of the intermittent sidewall 24 by a support angle 61. Support angle 61 is an internal angle located between the first side 51 / second side 52 and any cross-section 9 of one of the intermittent sidewalls 24, where the cross-section 9 is parallel to the first base surface 14 and the second base surface 15. When the intermittent sidewalls 24 are convex or concave, support angle 61 is an angle located between the first side 51 / second side 52 and an imaginary lateral plane 62 connecting the first side edge 3 and the second side edge 4 along the intermittent sidewalls 24. In a preferred embodiment, support angle 61 is an obtuse angle. However, in other embodiments, support angle 61 may be an acute angle or a right angle.

[0067] Please refer to Figures 23 to 26. Each of the multiple intermittent side walls 24 can be a flat surface, a convex surface, or a concave surface. Similarly, the first side surface 51 and the second side surface 52 can also be a flat surface, a convex surface, or a concave surface. In a more preferred configuration, the first side edge 3 and the second side edge 4 are angular structures. However, the first side edge 3 and the second side edge 4 can also be rounded structures. Therefore, the first side edge 3 and the second side edge 4 can have sharp corners or a rounded shape. Furthermore, in a more preferred configuration, the screwdriver head body 1 gradually becomes larger from the first base surface 14 to the second base surface 15. This gradually increasing configuration can be that all features of the screwdriver head body 1 become larger, or that the features of part of the screwdriver head body 1 become thinner and larger. The multiple intermittent side walls 24 can gradually increase in the radial direction from the first base surface 14 to the second base surface 15, wherein the distance from the multiple intermittent side walls 24 to the rotation axis 16 is smaller at the first base surface 14 than at the second base surface 15. The first side surface 51, the second side surface 52, and the at least one coupling cavity 8 may collectively or independently gradually increase in size from the first base surface 14 to the second base surface 15. Furthermore, the plurality of intermittent sidewalls 24, the first side surface 51, the second side surface 52, and the at least one coupling cavity 8 may each gradually decrease in size laterally, with the width of each feature being smaller at the first base surface 14 than at the second base surface 15. Overall, in a preferred configuration, the screwdriver bit body 1 is smaller at the first base surface 14 than at the second base surface 15.

[0068] As emphasized above, the present invention is not limited to a specific number of side walls. Figures 23 to 26 The present invention is shown in a configuration having six sidewalls 2 and six intermittent sidewalls 24. However, the present invention does not exclude configurations having other numbers of sidewalls. Configurations having four or six sides are most preferred because they are best suited for fastening with standard fasteners. However, other configurations are also contemplated. In any configuration, it is preferred that the number of sidewalls 2 matches the number of intermittent sidewalls 24.

[0069] Please refer to Figure 27 and Figure 28The at least one engagement cavity 8 can be elliptical, semi-elliptical, or partially elliptical. This embodiment shows a first distance 21 between the at least one engagement cavity 8 and the first side edge 3, and a second distance 22 between the at least one engagement cavity 8 and the second side edge 4. While this preferred configuration includes the first distance 21 and the second distance 22 being equal in length, at least one engagement cavity 8 can be offset from the center, with the first distance 21 being greater or less than the second distance 22. Furthermore, due to manufacturing limitations, the first distance 21 and the second distance 22 of the present invention may not necessarily be perfectly equal. Compared to a semicircular cross-section, a partially elliptical or semi-elliptical cross-section has a shallower depth into the screwdriver bit body 1 and can therefore have a greater width 25. This feature results in greater strength for the screwdriver bit body 1, particularly at or near the side edges. As previously mentioned, the cross-section of the at least one engagement cavity 8 can be a straight region, an angled region, or a curved region, thereby creating an elongated engagement cavity 8 with similar width and depth properties as an elliptical configuration.

[0070] exist Figure 27 and Figure 28 In the preferred configuration shown, at least one engagement cavity further comprises: a cavity bottom 71, a first connecting portion 72, and a second connecting portion 73. One side of the cavity bottom 71 is connected to the side surface 5 via the first connecting portion 72 and is adjacent to the first side edge 3. The other side of the cavity bottom 71, opposite the first connecting portion, is connected to the side surface 5 via the second connecting portion 73 and is adjacent to the second side edge 4. The first connecting portion 72 and the second connecting portion 73 are preferably concave or flat surfaces. This allows the fastener material to be displaced within the at least one engagement cavity 8 when the engagement feature engages the fastener. Thus, the present invention can achieve greater clamping force and torque without dulling the fastener or causing it to slip.

[0071] Please take another photo Figure 27 and Figure 28 . The first side edge 3 and the second side edge 4 are both sharp corners at the intersection of the side 5 of an arbitrary side wall 2 and the side 5 of an adjacent side wall. A side edge angle 70 is the angle measured between the first side edge 3 and the second side edge 4, which is the inner angle between the side 5 of an arbitrary side wall 2 and the side 5 of an adjacent side wall. Depending on the number of side walls 2, the side edge angle 70 is preferably 120 degrees or 90 degrees. However, the present invention may also adopt other angles. Furthermore, for each of the multiple side walls 2, the intersection of the first connecting portion 72 and the side 5, and the intersection of the second connecting portion 73 and the side 5, are sharp edges. For each of the sharp corners mentioned above, a small curvature may appear during the manufacturing process, but the sharp edge will still be maintained.

[0072] exist Figure 27and Figure 28 In the illustrated embodiment, at least one coupling cavity 8 further includes a first cavity 12 and a second cavity 13. This embodiment represents another configuration: as the at least one coupling cavity 8 is positioned away from the center of the sidewall 2, it maintains a clockwise and counterclockwise arrangement. Specifically, the first cavity 12 and the second cavity 13 are parallel to each other. The first cavity 12 is located adjacent to and extends from the first side edge 3, while the second cavity 13 is located adjacent to and extends from the second side edge 4. This provides the user with the benefit of multiple additional gripping points and allows for clockwise and counterclockwise rotation of the present invention. The first cavity 12 and the second cavity 13 may intersect or be spaced apart. An intermediate support surface 53 is located between the first cavity 12 and the second cavity 13, or at the intersection of the first cavity 12 and the second cavity 13. The intermediate support surface 53 may be colinear with the side surface 5, but does not necessarily need to be. The present invention is not limited to: at least one combining hole 8 can only have one first hole portion 12 and one second hole portion 13. In some embodiments, in addition to one first hole portion 12 and one second hole portion 13, at least one combining hole 8 can also have more hole portions.

[0073] Please refer to Figures 29 to 31 . The at least one combining hole 8 may include: a plurality of holes 800, and at least one protrusion 83, wherein the at least one protrusion 83 is located among the plurality of holes 800. Within the at least one combining hole 8, the at least one protrusion 83 can be easily distinguished from the plurality of holes 800, because: the at least one protrusion 83 is a convex structure, while the plurality of holes 800 are concave structures. In a preferred embodiment of the present invention, the plurality of holes 800 include: a first hole 81, and a second hole 82, wherein the at least one protrusion 83 is located between the first hole 81 and the second hole 82. The benefit of at least one protrusion 83 is to provide additional strength to the screwdriver head body 1. The reason is obvious: with at least one protrusion 83, the additional mass or material can increase the strength of the screwdriver head body 1. Furthermore, the at least one protrusion 83 within the at least one combining hole 8 can prevent the user from Figure 29 and Figure 31 The invention is shown to be incorrectly used with an incorrect fastener. Examples of applications include: Torx fasteners or Star fasteners, and upgraded Torx plus fasteners or upgraded Star plus fasteners. Figure 29 and Figure 31 The present invention is designed to be used with a hexagon socket fastener. Figure 29 and Figure 31 The invention, as shown, could be used with an incorrect fastener, potentially damaging the fastener and tool, thereby negating the advantages of the anti-slip grip design described herein. The inclusion of at least one protrusion 83 within at least one coupling cavity 8 addresses a common problem: incorrect tool use with an incompatible hexagon socket head cap screw. As described in the previous embodiment, the first side 51 may be adjacent to the first side edge 3, and the second side 52 may be adjacent to the second side edge 4. The first side edge 3 and the second side edge 4 may be sharp, rounded, or blunt. The at least one coupling cavity 8, having a first cavity portion 81, a second cavity portion 82, and at least one protrusion 83, may be located between the first side 51 and the second side 52. The present invention is not limited to the at least one coupling cavity 8 having only one first cavity portion 81 and one second cavity portion 82; rather, the present invention allows the at least one coupling cavity 8 to have any number of cavity portions. Similarly, in a preferred embodiment, the at least one coupling cavity 8 has only a single protrusion 83, but multiple protrusions are also within the scope of the present invention. In a preferred embodiment of the present invention, the protrusion 83 is located between the first cavity 81 and the second cavity 82. The first cavity 81 is adjacent to the first side 51 and opposite the first side edge 3; the second cavity 82 is adjacent to the second side 52 and opposite the second side edge 4. The cross-sectional shapes of the first cavity 81 and the second cavity 82 can be rounded or angular, including but not limited to partial circles, triangles, rectangles, and combinations of angular and arcuate shapes. Furthermore, if desired, each portion of the at least one coupling cavity 8 can have a shape selected from the group consisting of a straight line, a concave shape, and a convex shape. Using these shapes in combination or individually can enhance the lifespan, safety, and functionality of the present invention in certain user-selected applications. Similarly, if desired, the shape of the at least one protrusion 83 can be rounded, pointed, or flat, or selected from the group consisting of a straight line, a concave shape, and a convex shape, and these shapes can be used individually or in combination.

[0074] A midplane 84 can be drawn in any cross section 9 of one of the plurality of sidewalls 2 and is parallel to the first base surface 14 and the second base surface 15. Midplane 84 is a reference plane that is parallel to the first side surface 51 and passes through the axis of rotation 16. A projection distance 85 can be defined as the maximum distance between at least one projection 83 and midplane 84, perpendicular to the midplane. A side distance 86 can be defined as the minimum distance between the first side surface 51 and midplane 84. In a preferred embodiment of the present invention, projection distance 85 is less than side distance 86. However, in other embodiments of the present invention, projection distance 85 is equal to side distance 86, or projection distance 85 is greater than side distance 86.

[0075] Furthermore, a side plane 87 can be drawn parallel to the first side surface 51 and perpendicular to the first base surface 14. A first cavity depth 88 can be defined as the maximum distance from the side plane 87 to the first cavity portion 81 and is parallel to the side plane 87. A second cavity depth 89 can be defined as the maximum distance from the side plane 87 to the second cavity portion 82 and is parallel to the side plane 87. Furthermore, a cavity length 80 can be defined as the shortest distance between the first side surface 51 and the second side surface 52, spanning at least one coupling cavity 8. Furthermore, a first cavity length 801 can be defined as the shortest distance from the first side surface 51 to the protrusion 83, spanning the first cavity portion 81; a second cavity length 802 can be defined as the shortest distance from the second side surface 52 to the protrusion 83, spanning the second cavity portion 82. In a preferred embodiment of the present invention, the cavity length 80 is greater than the first cavity depth 88, and the cavity length 80 is greater than the second cavity depth 89. In certain embodiments of the present invention, the first cavity length 801 can be shorter than, longer than, or equal to the first cavity depth 88; and the second cavity length 802 can be shorter than, longer than, or equal to the second cavity depth 89. Preferably, the first cavity depth 88 is equal to the second cavity depth 89. However, in other embodiments, the first cavity depth 88 is longer or shorter than the second cavity depth 89.

[0076] Please refer to Figures 29 to 31 . Similar to the embodiment discussed above, the screwdriver head body 1 may further include: a plurality of intermittent side walls 24. Each of the plurality of intermittent side walls 24 is a plane that can be coupled to a socket fastener, just like a conventional screwdriver head. The plurality of intermittent side walls 24 are radially distributed around the rotation axis 16. Furthermore, the plurality of intermittent side walls 24 are interspersed between the plurality of side walls 2. The ratio of the plurality of side walls 2 and the plurality of intermittent side walls 24 can be changed to produce different screwdriver head designs. In one embodiment of the present invention, the plurality of intermittent side walls 24 and the plurality of side walls 2 are radially distributed intermittently with each other. In one embodiment of the present invention, three intermittent side walls 24 are present on each side wall 2. Such a layout allows a coupling feature / coupling tooth to be present on every other protrusion of each screwdriver head body 1.

[0077] In other embodiments, the present invention can be implemented in the form of a socket for tightening or loosening a bolt or other similar fastener. To achieve this purpose, the screwdriver head body 1 is implemented in the form of a hole penetrating a cylinder, just like a traditional socket design.

[0078] The present invention has been described above by way of examples, but it should be understood that these examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Any modifications or variations that do not depart from the spirit of the present invention are intended to be within the scope of the present invention.

Claims

1. An advanced gripping device comprising: At least one screwdriver bit body, wherein The at least one screwdriver head body further comprises: a plurality of side walls; Each of the plurality of side walls further comprises: a first side edge, a second side edge, a first side surface, a second side surface, and at least one combining cavity; The plurality of side walls are radially distributed around a rotation axis of the screwdriver head body; The first side edge and the second side edge are opposite to each other across the side wall; The at least one combining hole is vertically recessed into the screwdriver head body; The at least one combining hole further comprises: a plurality of hole portions, and at least one protrusion, wherein each of the plurality of hole portions is concave, and the at least one protrusion is convex; The at least one protrusion is located between the plurality of holes.

2. The advanced gripping device according to claim 1, further comprising: A mid-plane, where The midplane corresponds to each of the plurality of side walls and is located at a cross-section of the at least one screwdriver head body; The midplane is parallel to the first side surface; The midplane passes through the rotation axis; A protrusion distance is defined as: the maximum distance between the protrusion and the midplane, and the protrusion is perpendicular to the midplane; A side distance is defined as the minimum distance between the first side and the midplane. The advanced gripping device according to claim 2 , wherein the protrusion distance is equal to the side distance. The advanced gripping device according to claim 2 , wherein the protrusion distance is greater than the side distance. The advanced gripping device according to claim 2 , wherein the protrusion distance is smaller than the side distance. The advanced gripping device according to claim 1 , wherein the plurality of holes have an arc shape. The advanced gripping device according to claim 1 , wherein the plurality of holes have a pointed shape.

8. The advanced gripping device of claim 1, wherein the at least one protrusion has a rounded configuration.

9. The advanced gripping device of claim 1, wherein the at least one protrusion has a pointed configuration.

10. The advanced gripping device of claim 1, wherein the at least one protrusion has a flat configuration.

11. The advanced gripping device according to claim 1, wherein: The plurality of holes further include: a first hole and a second hole; At least one protrusion is located between the first hole and the second hole.

12. The advanced gripping device according to claim 11, further comprising: an imaginary side plane extending parallel to the first side surface; a first cavity depth, which is the maximum distance from the imaginary lateral plane to the first cavity portion and is perpendicular to the imaginary lateral plane; a second cavity depth, which is the maximum distance from the imaginary lateral plane to the second cavity portion and is perpendicular to the imaginary lateral plane; a cavity length, which is the shortest distance between the first side and the second side and spans the at least one binding cavity, in, The length of the hole is greater than the depth of the first hole; The length of the hole is greater than the depth of the second hole. 13 . The advanced gripping device according to claim 12 , wherein the first hole depth is greater than the second hole depth, or the second hole depth is greater than the first hole depth. The advanced gripping device according to claim 12 , wherein the first hole depth is equal to the second hole depth.

15. The advanced gripping device according to claim 1, wherein: The at least one combining hole comprises: a first hole area and a second hole area; The first cavity area and the second cavity area are separated by a middle side area.

16. The advanced gripping device according to claim 1, further comprising: Multiple intermittent side walls, in, The plurality of intermittent side walls are radially distributed around the rotation axis of the at least one screwdriver head; The plurality of intermittent side walls are interspersed between the plurality of side walls.

17. The advanced gripping device of claim 16, wherein each of the plurality of intermittent sidewalls is a flat surface.

18. The advanced gripping device according to claim 1, wherein: The first side surface is adjacent to the first side edge; The first hole is located adjacent to the first side surface and opposite to the first side edge; The second side surface is adjacent to the second side edge; The second hole is located adjacent to the second side surface and opposite to the second side edge. The advanced gripping device according to claim 1 , wherein the first side surface and the second side surface are parallel to each other.

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