JP3240867U - Hand tool work head structure - Google Patents

Abstract

The present invention provides a work head structure for a hand tool in which the service life of the end of the work is extended and the rotational frictional force of the first concave surface is high.
A workhead structure for a hand tool includes a body (10). A work end 11 is provided at one end of the body. The work end has a plurality of first work portions 12 and a plurality of second work portions 13 . The first work part and the second work part are arranged in an annular shape so as to intersect at the axial center of the end of the work. Each first work piece is provided between two second work pieces. Each second work part is provided between two first work parts. The first workpiece is a bump. The second work portion is a groove. The first work portion has a plurality of first concave grooves 121 . Each first concave groove is linearly arranged at intervals. A first end portion and a second end portion are provided at both ends of the first work portion.
[Selection drawing] Fig. 1

Description

The present invention relates to a workhead structure for hand tools.

Conventional driver bit head structures include, for example, Patent Document 1 and Patent Document 2, but these have the following drawbacks (1) and (2).
(1) For example, as shown in FIGS. 2 and 3 of Patent Document 2, an opening angle is formed between the second contact surface 231 and the joint surface 22, and an inner ring 222 is formed at the corner. When the plurality of second abutment surfaces 231 rotate the screw 30, it is difficult for the plurality of inner rings 222 to disperse the stress. When doing so, the inner ring 222 sometimes breaks.
(2) When the first work part 21 or the second work part 23 rotates the screw 30 , there is a gap between the plurality of first contact surfaces 211 and the screw 30 and the plurality of second contact surfaces 231 . The anti-slip effect between the screw and the screw 30 was not favorable.

U.S. Pat. No. 7,322,265 B2 Taiwan Utility Model Publication No. M289681

In order to solve the above problems, according to a first aspect of the present invention, there is provided a work head structure for a hand tool having a body, wherein one end of the body is provided with a work end, and the work end is provided at one end of the body. is fitted to the work when rotating the work, the end of the work has a plurality of first work portions and a plurality of second work portions, the first work portion and the second work portion Two work portions are arranged in a ring so as to intersect at the axial center of the end of the work, each of the first work portions is provided between two of the second work portions, and each of the second work portions is is provided between the two first work portions, the first work portions are bumps, the second work portions are grooves, and the first work portions include a plurality of first work portions. Each of the first grooves is linearly arranged at intervals, and a first end and a second end are provided at both ends of the first work part. The outer diameter of the second end is larger than that of the first end, a virtual first side surface is provided on the outer peripheral surface of the first work part, and the first A side surface extends from the second end to the first end, and each of the first grooves has a first concave surface, the first concave surface comprising at least one first concave surface. There is provided a work head structure for a hand tool, characterized in that it has a single arc and said body is a screwdriver bit structure, a hex head structure, a hex wrench structure or a ball head structure.

1 is a perspective view of a work head structure of a hand tool according to a first embodiment of the present invention; FIG. 1 is an explanatory view showing a work head structure of a hand tool according to a first embodiment of the present invention; FIG. 1 is a front view of a work head structure of a hand tool according to a first embodiment of the present invention; FIG. 1 is a side view of a first operating state of a work head structure of a hand tool according to a first embodiment of the present invention; FIG. Figure 5 is a cross-sectional view along line AA of Figure 4; FIG. 6 is an enlarged view of a portion B of FIG. 5; FIG. 5 is a perspective view of the work head structure of the hand tool according to the second embodiment of the present invention; FIG. 5 is a perspective view of the work head structure of the hand tool according to the third embodiment of the present invention; FIG. 5 is a perspective view of a work head structure of a hand tool according to a fourth embodiment of the present invention; FIG. 5 is an explanatory view showing a work head structure of a hand tool according to a fifth embodiment of the present invention; FIG. 6 is an explanatory view showing the work head structure of the hand tool according to the sixth embodiment of the present invention; FIG. 11 is a perspective view of a work head structure of a hand tool according to a seventh embodiment of the present invention; FIG. 12 is a perspective view of the work head structure of the hand tool according to the eighth embodiment of the present invention; FIG. 11 is a perspective view of a work head structure of a hand tool according to a ninth embodiment of the present invention;

(First embodiment)
Please refer to FIGS. 1-3. FIG. 1 is a perspective view showing a work head structure of a hand tool according to a first embodiment of the present invention; FIG. FIG. 2 is an explanatory diagram showing the work head structure of the hand tool according to the first embodiment of the present invention. FIG. 3 is a front view of the work head structure of the hand tool according to the first embodiment of the present invention;

As shown in FIGS. 1-3, the workhead structure of the hand tool according to the first embodiment of the present invention comprises a body 10. As shown in FIG. A work end 11 is provided at one end of the main body 10 . A plurality of first work portions 12 and a plurality of second work portions 13 are provided at the work end 11 . The first work portion 12 and the second work portion 13 are arranged in an annular shape so as to intersect at the axial center of the work end 11 . Each first work part 12 is provided between two second work parts 13 . Each second work part 13 is provided between two first work parts 12 . The first work part 12 is a bump. The second work part 13 is a groove. The number of the first work portions 12 and the number of the second work portions 13 are four, respectively, and the cross section of the work end 11 presents a substantially cross shape. The body 10 is a driver bit.

The first work part 12 has a plurality of first grooves 121 . The respective first grooves 121 are linearly arranged parallel to each other at intervals. Each first groove 121 has the same depth. The number of first grooves 121 may be three, four, five or six. A first end portion 122 and a second end portion 123 are provided at both ends of the first work portion 12 . The outer diameter of the second end 123 is larger than the first end 122 . A virtual first side surface 124 is provided on the outer peripheral surface of the first work part 12 . First side surface 124 extends from second end 123 to first end 122 . The first side surface 124 is slanted. The first side surface 124 is linear.

In order to reduce the line of the work end 11 in FIG. 2, the plurality of second work portions 13 are first omitted in FIG. Each first groove 121 has a first concave surface 125 . First concave surface 125 has at least one first single arc 126 . The first concave surface 125 is formed by a partial arc of the first single arc 126 . The centers of the plurality of first single arcs 126 are connected together to form connecting lines 127 . The connecting line 127 is parallel to the first side face 124 . The distance from the connecting line 127 to the first side face 124 is a first distance 1271 . The distance from the first single arc 126 closest to the first end 122 to the first end 122 is a second distance 128 . The distance from the first single arc 126 closest to the second end 123 to the second end 123 is a third distance 129 .

The center of the first single arc 126 is not located within the workpiece edge 11 . A first distance 1271 is less than the radius of the first single arc 126 or less than half the radius of the first single arc 126 . A second distance 128 is greater than the radius of the first single arc 126 . Second distance 128 is greater than or approximately twice as long as third distance 129 . Second distance 128 is greater than first distance 1271 . Third distance 129 may be approximately equal to or equal to first distance 1271 .

The work end 11 is provided with an end portion 14 . The end 14 has a conical shape. A second concave surface 141 is provided at the most central portion of the end portion 14, which is the most uneven portion. A second concave surface 141 is constituted by a second single arc 142 . A first end portion 122 is provided between the first work portion 12 and the end portion 14 .

The center of the second single arc 142 is not located within the workpiece edge 11 . Second single arc 142 is larger than first single arc 126 . A second single arc 142 has the maximum numerical value.

During actual manufacturing, the plurality of first concave surfaces 125 are processed first, the first concave surface 125 closest to the second end 123 , and then sequentially from the second end 123 to the first end 122 . After each first concave surface 125 is machined, the second concave surface 141 is re-machined, and finally the plurality of second work portions 13 are re-machined to complete the entire work end 11 .

Please refer to FIGS. 4-6. FIG. 4 is a side view of the first operating state of the work head structure of the hand tool according to the first embodiment of the present invention; FIG. 5 is a cross-sectional view along line AA of FIG. FIG. 6 is an enlarged view of part B of FIG. As shown in FIGS. 4-6, the work head structure of the hand tool according to the first embodiment of the present invention further comprises a screw member 20. As shown in FIG. A first surface portion 21 is provided in the threaded member 20 . Generally, the second surface portion 22 is formed on the first surface portion 21 due to the tolerance of the processing elements. The second surface portion 22 has a planar shape. When one end of the work end 11 is inserted into the first surface portion 21 and the screw member 20 is rotated, the second concave surface 141 is accommodated in the second surface portion 22, and the end portion 14 and the first work portion 12 are separated. , a suitable contact surface is formed between the first surface portion 21, the contact area between the first work portion 12 and the screw member 20 increases, and when the work end 11 rotates the screw member 20, Operating torque is obtained and stress can be distributed.

(Second embodiment)
Please refer to FIG. FIG. 7 is a perspective view of the work head structure of the hand tool according to the second embodiment of the present invention; The numbers of the first work part 12 and the second work part 13 are six. The body 10 is the workhead structure of a Torx® hand tool.

(Third Embodiment)
Please refer to FIG. FIG. 8 is a perspective view of the work head structure of the hand tool according to the third embodiment of the present invention; As shown in FIG. 8, the work end 11 is not provided with the second work portion 13 . The number of first work portions 12 is two. Two first work parts 12 are provided symmetrically at the work end 11 . The body 10 is a linear hand tool workhead structure.

(Fourth embodiment)
See FIG. FIG. 9 is a perspective view of the work head structure of the hand tool according to the fourth embodiment of the present invention; As shown in FIG. 9, the main body 10 has an L shape. Work ends 11 are provided at both ends of the main body 10, respectively. The body 10 is of hex wrench construction.

(Fifth embodiment)
Please refer to FIG. FIG. 10 is an explanatory diagram showing the work head structure of the hand tool according to the fifth embodiment of the present invention. The connecting line 127 and the first side surface 124 of the workhead structure of the hand tool according to the fifth embodiment are non-parallel, and the closer the second end 123 is, the deeper the first concave surface 125 is. An included angle 1272 is formed between the connection line 127 and the first side surface 124 . Included angle 1272 may be between 2 and 8 degrees, or less than 5 degrees.

(Sixth embodiment)
Please refer to FIG. FIG. 11 is an explanatory diagram showing the work head structure of the hand tool according to the sixth embodiment of the present invention. As shown in FIG. 11, the first concave surface 125 of the workhead structure of the hand tool according to the sixth embodiment of the present invention comprises a first single arc 126, a first line 1261 and a second line 1262. have. A first line 1261 is provided on one side of the first single arc 126 . A second line 1262 is provided on the other side of the first single arc 126 . A first single arc 126 is provided between a first line 1261 and a second line 1262 . A first line 1261 and a second line 1262 are tangents to the first single arc 126 . A first line 1261 is perpendicular to the axis of the workpiece edge 11 .

(Seventh embodiment)
Please refer to FIG. FIG. 12 is a perspective view of the work head structure of the hand tool according to the seventh embodiment of the present invention; As shown in FIG. 12, the work end 11 has a hexagonal head structure.

(Eighth embodiment)
Please refer to FIG. FIG. 13 is a perspective view of the work head structure of the hand tool according to the eighth embodiment of the present invention; As shown in FIG. 13, the main body 10 of the work head structure of the hand tool according to the eighth embodiment of the present invention is a rod-like body bent into an L shape. As shown in FIG. 13, a first work portion 12 and a second work portion 13 are provided at both ends of the main body 10, respectively. Between the main body 10 and the work end 11, work ends 11 distinguished by different colors may be provided.

(Ninth embodiment)
Please refer to FIG. FIG. 14 is a perspective view of the work head structure of the hand tool according to the ninth embodiment of the present invention; As shown in FIG. 14 , one end of the main body 10 is provided with a first work portion 12 , a second work portion 13 and a plurality of first grooves 121 . The work end 11 is hexagonal or polygonal. The first side surface 124 has a curved shape.

As can be seen from the above, the work head structure of the hand tool according to the present invention has the following advantages (1) and (2).
(1) The first concave surface 125 has a first single arc 126, and when the screw member 20 is rotated by the work end 11, the stress is dispersed by the plurality of first single arcs 126, and the work end The breakage of the first groove 121 is prevented when the workpiece 11 is operated, and the service life of the workpiece end 11 is extended.
(2) The contact area of the work end 11 is increased by the plurality of first concave surfaces 125, and when the work end 11 and the first surface portion 21 are brought into contact with each other, the plurality of first concave surfaces 125 have a high rotational frictional force. is obtained.

10 main body 11 work end 12 first work portion 13 second work portion 14 end portion 20 screw member 21 first surface portion 22 second surface portion 121 first groove 122 first end portion 123 second end Part 124 First side surface 125 First concave surface 126 First single arc 127 Connection line 128 Second distance 129 Third distance 141 Second concave surface 142 Second single arc 1261 First line 1262 Second line 1271 First distance 1272 Included angle

Claims (10)

A hand tool workhead structure comprising a body,
A work end is provided at one end of the main body, the work end is fitted to the work when the work is rotated, and the work end comprises a plurality of first work portions and a plurality of second work portions. and a work portion, wherein the first work portion and the second work portion are arranged in a ring so as to intersect at the axial center of the end of the work, and each of the first work portions includes two of the second work portions. provided between two work portions, each said second work portion being provided between two said first work portions, said first work portions being bumps, said second work portions comprising: is a concave groove,
The first work portion has a plurality of first grooves, each of the first grooves is arranged in a straight line at intervals, and the first work portion has a first groove at both ends thereof. A first end and a second end are provided, the outer diameter of the second end is larger than that of the first end, and a virtual first a side face, said first side face extending from said second end to said first end;
each said first concave groove having a first concave surface, said first concave surface having at least one first single arc;
The body has a screwdriver bit structure, a hexagonal head structure, a hexagonal wrench structure or a spherical head structure,
Hand tool work head structure. The number of the first work part and the number of the second work part are each four,
2. A work head structure for a hand tool according to claim 1, wherein the cross section of said end of said work is substantially cross-shaped. The first grooves are arranged parallel to each other, the depths of the first grooves are the same, and the number of the first grooves is 3, 4, 5 or 6. , and the first side surface is inclined or linear. An end portion is provided at the end of the work, the end portion has a conical shape, and a second concave surface is provided at the most central portion of the end portion, which is the most uneven portion. 2. The hand tool of claim 1, wherein the concave surface is defined by a second single arc and said first end is located between said first work piece and said end. work head structure. The first concave surface is formed by a part of the first single arc, the centers of the plurality of first single arcs are connected to each other to form a connection line, and the connection line is parallel to the first side face, the distance from the connecting line to the first side face is a first distance, and the first unit closest to the first end The distance from an arc to said first end is a second distance, and the distance from said first single arc closest to said second end to said second end is a third distance. 5. The workhead structure of a hand tool according to claim 4, wherein distance. the center of the first single arc is not located within the end of the workpiece;
the first distance is less than the radius of the first single arc or less than half the radius of the first single arc;
the second distance is greater than the radius of the first single arc;
The second distance is greater than or substantially twice as long as the third distance, and the second distance is greater than the first distance and greater than the third distance. 6. The hand tool workhead structure of claim 5, wherein the distance is substantially equal to or equal to the first distance. the center of the second single arc is not located within the end of the workpiece;
the second single arc is larger than the first single arc;
6. The hand tool workhead structure of claim 5, wherein said second single arc has a maximum numerical value. In actual manufacturing, the plurality of first concave surfaces are first processed from the first concave surface closest to the second end, and sequentially from the second end to the first end. After each of the first concave surfaces is machined, the second concave surface is re-machined, and finally the plurality of second work portions are re-machined to complete the entire work end. The hand tool workhead structure according to claim 4. further comprising a screw member;
A first surface portion is provided within the screw member, and generally, a second surface portion is formed on the first surface portion due to tolerances of processing elements, the second surface portion exhibits a planar shape, and the second surface portion is planar. 5. The second concave surface is accommodated in the second surface portion when one end of the workpiece is inserted into the first surface portion and the screw member is rotated. Hand tool work head structure. The number of the first work part and the second work part is six,
the body has a Torx® hand tool workhead structure, or a linear hand tool workhead structure, or has an L shape;
The work head structure of a hand tool according to claim 1, characterized in that the two ends of the body are provided with the work ends, respectively, and the body has a hexagonal wrench structure.

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