DE202023103565U1 - Attachment structure of a hand tool - Google Patents

Abstract

Attachment structure of a hand tool having a main body (10), characterized in that
- that the main body (10) has a male portion (11), the male portion (11) having six drive parts (12) and six female parts (13), and the six drive parts (12) and the female parts (13) in a regular spaced apart about the axis of the main body (10);
- that the drive part (12) is designed in a convexly curved shape and has two first arcuate surfaces (121) and a second arcuate surface (122), the second arcuate surface (122) being in the middle of the drive part (12) and between the two first arcuate surfaces (121), and wherein the second arcuate surface (122) is more convex than the first arcuate surface (121), so that every two first arcuate surfaces (121) can be separated by the second arcuate surface (122);
- that the first arcuate surface (121) has a first radius (123) and the second arcuate surface (122) has a second radius (124), the first radius (123) being greater than the second radius (124), and the ratio between the value of the first radius (123) and the value of the second radius (124) is greater than 3 to 1, or the ratio is greater than 2 to 1, and wherein the first arcuate surface (121) is a horizontal line and the second arcuate surface (122) is also tangent to a horizontal line, and there is a first distance (125) between the two horizontal lines which is less than 0.7 mm, or less than 0.6 mm, or less than 0.5 mm, and wherein the two ends of the second arcuate surface (122) have a second spacing (126);
- that the receiving part (13) is in the form of a concave arcuate surface, each receiving part (13) being positioned between the two first arcuate surfaces (121), and the receiving part (13) forming a first circle (131), the the first circle (131) and the first arcuate surface (121) are non-tangent, and the first circle (131) has a third radius (132) smaller than the first radius (123) or smaller than the second radius (124), and wherein the receiving part (13) is formed in the shape of a single arc;
- that a first center point (14) forming a second circle (141) is located in the center of the male portion (11), a first hexagon (142) being tangent to the second circle (141) from the outside, and each of the second arcuate surfaces (122) tangent to the second circle (141) and the side of the first hexagon (142), and the first center point (14) has an associated first vertical line (143), and the apex of the second arcuate surface (122) lies on the first vertical line (143), and wherein the centers of the first arcuate surface (121) and the second arcuate surface (122) also lie on the first vertical line (143);
- that there is a third distance (144) between opposite sides of the first hexagon (142), each side of the first hexagon (142) being defined by a length referred to as the fourth distance (145), and the fourth distance (145) is between 3 and 5 times the third distance (126), or between 3.7 and 4.3 times the third distance (126).
- that the second hexagon (146) is located about the first center point (14), the second hexagon (146) being smaller than the first hexagon (142), and the sides of the second hexagon (146) being parallel to the sides of the first hexagon (142), and wherein the second hexagon (146) has six vertices (147), each of which is at the same position as the center of the first circle (131), and each vertex (147) of the second hexagon (146) corresponds to the center of the circle defined by the third radius (132).

Description

The invention relates to a tip structure of a hand tool, more particularly to a tip structure in which the edges of a threaded member are not damaged by tightening or loosening, and the fitting portion has a balanced structure in terms of outer diameter and non-wearing.

For example, an attachment structure of a hand tool is off U.S. 2007/0125204A1 and TW M270886 (patent designation: socket wrench to prevent damage to the screw head).

1. 1. Wie in den 5 und 7 aus US 2007/0125204A1 dargestellt, wenn die Nuss 20 auf einen Schraubenkopf 40 zum Drehen ausgesetzt werden, liegen sechs abgeschrägte Vorsprünge 24 etwa mittig gegen die sechs Seitenflächen des Schraubenkopfes 40 an, um den Schraubenkopf 40 zum Drehen anzutreiben. Die abgeschrägten Vorsprünge 24 ragen stark in das Einsteckloch 22 hinein. Die Ausweichnut 23 des Einstecklochs 22 und die Kante des Schraubenkopfs 40 haben einen großen Abstand. Bei der Drehung des Einstecklochs 22 ist es schwierig, die Kante des Schraubenkopfs 40 abzunutzen. Strukturell gesehen, je mehr die abgeschrägten Vorsprünge 24 herausragen, desto geringer ist die Wahrscheinlichkeit, dass sie die Kante des Schraubenkopfes 40 abnutzen. Aber wenn die abgeschrägten Vorsprünge 24 stärker hervorstehen, muss die Nuss 20 eine bestimmte Wanddicke haben, um ihr Drehmoment aufrechtzuerhalten. Wenn die abgeschrägten Vorsprünge 24 hervorstehen, erhöht dies den Außendurchmesser der Nuss 20. Je mehr sie herausragen, desto größer ist der Außendurchmesser der Nuss 20.
2. 2. Die abgeschrägten Vorsprünge 24 sind spitzenwinkelförmig. Das Drehmoment der abgeschrägten Vorsprünge 24 ist nicht ausreichend. Nach einer Weile des Drehens des Schraubenkopfes 40 durch die Nuss 20 können die abgeschrägten Vorsprünge 24 abgenutzt und rund werden.
3. 3. Wenn die Nuss 20 den Schraubenkopf 40 dreht, kommen immer die abgeschrägten Vorsprünge 24 und der Schraubenkopf 40 miteinander in Kontakt. Da die abgeschrägten Vorsprünge 24 spitzenwinkelförmig sind, können sie den Schraubenkopf 40 verkratzen.

But the key head structure has the following disadvantages:

1. 1. As in the 5 and 7 out of U.S. 2007/0125204A1 As illustrated, when the nut 20 is subjected to a screw head 40 for rotation, six chamfered projections 24 abut approximately centrally against the six side faces of the screw head 40 to drive the screw head 40 to rotate. The beveled projections 24 protrude greatly into the insertion hole 22 . The escape groove 23 of the insertion hole 22 and the edge of the screw head 40 have a large distance. With the rotation of the insertion hole 22, the edge of the screw head 40 is difficult to wear. Structurally, the more the beveled projections 24 protrude, the less likely they are to wear the edge of the screw head 40. But if the chamfered projections 24 protrude more, the nut 20 must have a certain wall thickness in order to maintain its torque. When the chamfered projections 24 protrude, it increases the outside diameter of the nut 20. The more they protrude, the larger the outside diameter of the nut 20.
2. 2. The beveled projections 24 are sharp-angled. The torque of the chamfered projections 24 is not sufficient. After turning the screw head 40 by the nut 20 for a while, the chamfered projections 24 may become worn and round.
3. 3. When the nut 20 turns the screw head 40, the chamfered projections 24 and the screw head 40 always come into contact with each other. Since the chamfered projections 24 are sharply angled, they can scratch the screw head 40 .

The invention is based on the object of creating an attachment structure for a hand tool which avoids the disadvantages mentioned above by means of simple measures.

According to the invention, this object is achieved by an attachment structure of a hand tool which has the features specified in claim 1 . Further advantageous developments of the invention emerge from the features of the dependent claims.

According to the invention, there is provided an attachment structure of a hand tool having a main body. The main body has a male portion, six driving parts, six female parts, two first arc surfaces, a second arc surface, a first radius, a second radius, a first space, and a third space. The receiving part has a concave arcuate shape, with each receiving part being arranged between every two first arcuate surfaces. A first circle with a third radius is located in the receiving part. At the center of the male portion there is a first midpoint which forms a second circle which forms a first hexagon. The first midpoint lies on a first vertical line. Starting from the first midpoint as the center, a second hexagon is formed, which is smaller than the first hexagon. Six vertices are in the same position as the center of the first circle.

Compared to the prior art, the second arcuate surface protrudes slightly above the first arcuate surface such that there is a first spacing between the first arcuate surface and the second arcuate surface. A receiving part is also provided, in which a first circle is formed. The first circle is not tangent to the first arc face. That is, the second arcuate surface is slightly protruded while the receiving part is somewhat recessed. The second arcuate surface and the box significantly reduce the likelihood that the male portion will wear the edges of the threaded member. The first distance is very small, with the outer diameter of the main body being increased only slightly due to the second arcuate surface. The outer periphery of the main body and the mating portion will not wear the edges of the threaded member. The mating section strikes a balance between outside diameter and wear resistance.

• 1 eine perspektivische Darstellung eines ersten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 2 eine Vorderansicht des ersten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 3 eine Vorderansicht des ersten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur im ersten Betriebszustand;
• 4 eine Vorderansicht des ersten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur im zweiten Betriebszustand;
• 5 eine Vorderansicht des ersten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur im dritten Betriebszustand;
• 6 eine Vorderansicht des ersten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur vor Eingriff mit einem sternförmigen Gewindeelement;
• 7 eine perspektivische Darstellung eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 8 eine perspektivische Darstellung eines dritten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 9 eine perspektivische Darstellung eines vierten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 10 eine perspektivische Darstellung eines fünften Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 11 eine perspektivische Darstellung eines sechsten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 12 eine perspektivische Darstellung eines siebten Ausführungsbeispiels einer erfindungsgemäßen Aufsatzstruktur eines Handwerkzeugs;
• 13 einen vergrößerten Ausschnitt aus 12A; und
• 14 einen vergrößerten Ausschnitt aus 12B;

The invention and its configurations are explained in more detail below with reference to the drawing. In the drawing shows:

• 1 a perspective view of a first embodiment of an attachment structure of a hand tool according to the invention;
• 2 a front view of the first embodiment of an attachment structure of a hand tool according to the invention;
• 3 a front view of the first embodiment of an attachment structure according to the invention in the first operating state;
• 4 a front view of the first embodiment of an attachment structure according to the invention in the second operating state;
• 5 a front view of the first embodiment of an attachment structure according to the invention in the third operating state;
• 6 a front view of the first embodiment of an attachment structure according to the invention before engagement with a star-shaped threaded element;
• 7 a perspective view of a second embodiment of an attachment structure of a hand tool according to the invention;
• 8th a perspective view of a third embodiment of an attachment structure of a hand tool according to the invention;
• 9 a perspective view of a fourth embodiment of an attachment structure of a hand tool according to the invention;
• 10 a perspective view of a fifth embodiment of an attachment structure of a hand tool according to the invention;
• 11 a perspective view of a sixth embodiment of an attachment structure of a hand tool according to the invention;
• 12 a perspective view of a seventh embodiment of an attachment structure of a hand tool according to the invention;
• 13 an enlarged section 12A ; and
• 14 an enlarged section 12B ;

How out 1 and 2 As can be seen, the attachment structure of a hand tool according to the invention has a main body 10 1 .

The main body 10 has a male portion 11, six driving parts 12 and six female parts 13. The six driving parts 12 and the female parts 13 are arranged around the axis of the main body 10 at a regular interval. The main body 10 is a torx wrench structure or can be used as an attachment structure for various hand tools.

Each drive member 12 is formed with a convex curved surface and includes two first arcuate surfaces 121 and a second arcuate surface 122. The second arcuate surface 122 is located at the center of the drive member 12 and between the two first arcuate surfaces 121, with the second arcuate surface 122 being more convex is than the first arc surface 121, so that every two first arc surfaces 121 can be separated by the second arc surface 122.

The first arcuate surface 121 has a first radius 123, the second arcuate surface 122 has a second radius 124, the first radius 123 is larger than the second radius 124. The ratio between the value of the first radius 123 and the value of the second radius 124 is larger than 3 to 1, or the ratio is greater than 2 to 1. The first arcuate surface 121 touches a horizontal line and the second arcuate surface 122 also touches a horizontal line. Between the two horizontal lines there is a first distance 125 that is less than 0.7 mm, or less than 0.6 mm, or less than 0.5 mm. The two ends of the second arcuate surface 122 have a second spacing 126.

The receiving part 13 is formed in the shape of a concave arc surface, with each receiving part 13 being positioned between the two first arc surfaces 121 . The receiving part 13 forms a first circle 131, the first circle 131 and the first arcuate surface 121 being non-tangent. The first circle 131 has a third radius 132 which is smaller than the first radius 123, or smaller than the second radius 124. The receiving part 13 is in the form of a single arc.

A first center point 14 forming a second circle 141 is located at the center of the male portion 11. A first hexagon 142 is tangent to the outside of the second circle 141. Each of the second arcuate surfaces 122 is tangent to the second circle 141 and the side of the first hexagon 142. The first midpoint 14 has an associated first vertical line 143. The apex of the second arcuate surface 122 lies on the first vertical line 143. The midpoints of the first arcuate surface 121 and the second arcuate surface 122 also lie on the first vertical line 143.

A third spacing 144 exists between opposite sides of the first hexagon 142. Each side of the first hexagon 142 has a fourth spacing 145. The fourth spacing 145 is between three and five times that of the third distance 126, or between 3.7 times and 4.3 times the third distance 126.

The second hexagon 146 is arranged around the first center point 14 . The second hexagon 146 is smaller than the first hexagon 142. The sides of the second hexagon 146 are parallel to the sides of the first hexagon 142. The second hexagon 146 has six vertices 147, each of which is at the same position as the center of the first Circle 131 is located. That is, the corner point 147 is the center of the third radius 132.

The second hexagon 146 has six vertices 147, each vertex 147 being at the same location as the center of each first circle 131. FIG. This is the basic structural principle of the star-shaped structure that consists of 3 the US Patent 3584667 is known. Therefore, the principle of forming the accommodating portion 13 is identical to that of the component 18 in 3 the US Patent 3584667 .

When rotating the threaded member 20 clockwise with the main body 10 as shown in FIG 3 1, every other arcuate surface 122 abuts each side surface of threaded member 20. As shown in FIG. Since the first clearance 125 exists between the second arcuate surface 122 and the first arcuate surface 121, when the second arcuate surface 122 abuts against the side surface of the threaded member 20, a clearance between the first arcuate surface 121 located to the right of the second arcuate surface 122 and the Side surface of the threaded member 20 maintained, whereby the first arcuate surface 121 does not abut against the side surface of the threaded member 20. Another first arcuate surface 121 is also removed from the side surface of the threaded member 20 . The six edges of threaded member 20 are each within the range of box portion 13. When male portion 11 rotates threaded member 20, box portion 13 is not tangent to first arcuate surface 121, thereby avoiding wear on the edges of threaded member 20.

4 12 shows the second operating state of the hand tool attachment structure of the present invention before engagement with the threaded member 20. The first arcuate surface 121 left of the second arcuate surface 122 is spaced from the side surface of the threaded member 20. That is, the first arcuate surface 121 does not abut against the side surface of the threaded member 20. The six edges of the threaded member 20 are each within the range of the female portion 13. The male portion 11 rotates the threaded member 20 counterclockwise.

5 12 shows the third operational state of the hand tool attachment structure of the present invention before engagement with the thread member 20. When the six-sided thread member 20 is worn and has rounded edges, the main body 10 can rotate the thread member 20 counterclockwise. The apex of the second arcuate surface 122 may also abut against either side surface of the threaded member 20 to loosen the worn rounded-corner threaded member 20 .

6 shows a front view of the attachment structure according to the invention in engagement with the star-shaped thread element 30. Each vertex 147 is located at the same place as the center of each first circle 131. The six round ends of the star-shaped thread element 30 can each be fitted into each receiving section 13. In this way, the star-shaped threaded element 30 is anchored to the cap structure according to the invention and can be rotated accordingly.

7 Fig. 13 shows a second embodiment of the attachment structure according to the invention, wherein the main body 10 is designed as a ratchet structure which is rotatably arranged on a ratchet wrench.

8th 12 shows a third embodiment of the attachment structure according to the invention, in which the main body 10 is designed as a nut.

9 Fig. 14 shows a fourth embodiment of the attachment structure according to the present invention, in which the main body 10 is formed with a T-handle wrench.

10 Fig. 13 shows a fifth embodiment of the cap structure according to the present invention, in which the main body 10 is formed with a universal joint.

11 shows a sixth embodiment of the attachment structure according to the invention, wherein the main body 10 is designed as a spanner head. Opposite the inside 1 The main body 10 shown in FIG 11 Main body 10 shown has two side surfaces, resulting in a spanner structure. Of course, the main body 10 can be designed as a pipe wrench.

12 until 14 show a seventh embodiment of the attachment structure according to the invention. As in 14 shown, is the receiving part 13 arched deepened. Each receiving part 13 is arranged between two first curved surfaces 121 in each case. A first circle 131 is formed in the receiving part 13 , the first circle 131 being tangential to the first arcuate surface 121 . However, the receiving part 13 and the first arc surface 121 are not tangent to each other. The radius of the receiving portion 13 is slightly larger than the radius of the first circle 131. The receiving portion 13 and the first circle 131 have the same center, and the receiving portion 13 is formed as a single arc.

In a further exemplary embodiment of the present invention, the transition between the receiving part 13 and the first arcuate surface 121 can have a rounded structure between the receiving part 13 and the first arcuate surface 121, so that the transition between the receiving part 13 and the first arcuate surface 121 is smooth.

1. 1. Das Antriebsteil 12 weist die erste Bogenfläche 121 und die zweite Bogenfläche 122 auf, die etwas über die erste Bogenfläche 121 hinaus steht, so dass zwischen der ersten Bogenfläche 121 und der zweiten Bogenfläche 122 ein erster Abstand 125 besteht. Wenn der Hauptkörper 10 das Gewindeelement 20 dreht, liegt jede zweite Bogenfläche 122 an jeder Seitenfläche des Gewindeelements 20 an. Dies führt zu einem Abstand zwischen einer ersten Bogenfläche 121 und der Seitenfläche des Gewindeelements 20, während die andere erste Bogenfläche 121 auch von der Seitenfläche des Gewindeelements 20 entfernt ist. Die sechs Kanten des Gewindeelements 20 befinden sich jeweils innerhalb des Bereichs jedes Aufnahmeteils 13, wodurch ein Verschleiß an den sechs Kanten des Gewindeelements 20 vermieden wird.
2. 2. Der Scheitelpunkt der zweiten Bogenfläche 122 ragt etwas über den Scheitelpunkt der ersten Bogenfläche 121 hinaus. Der erste Abstand 125 ist nur geringfügig kleiner als 0,5 mm, d.h. der Außendurchmesser des Hauptkörpers 10 ist nur geringfügig aufgrund der zweiten Bogenfläche 122 erhöht.
3. 3. Der Aufnahmeteil 13 ist bogenförmig vertieft. Jedes der Aufnahmeteile 13 ist zwischen je zwei ersten Bogenflächen 121 angeordnet, wobei im Aufnahmeteil 13 ein erster Kreis 131 ausgebildet ist. Der erste Kreis 131 und die erste Bogenfläche 121 sind nicht tangential. Wenn der Hauptkörper 10 das Gewindeelement 20 dreht, befindet sich jede Kante des Gewindeelements 20 jeweils innerhalb des Bereichs jedes Aufnahmeteils 13. Durch das Aufnahmeteil 13 kann ein Verschleiß an den Kanten des Gewindeelements 20 vermieden werden.
4. 4. Das Aufnahmeteil 13 hat einen ersten Kreis 131, das Zentrum des ersten Kreises 131 befindet sich an der gleichen Stelle wie der Eckpunkt 147 des zweiten Sechsecks 146. Jedes der sechs runden Enden des sternförmigen Gewindeelements 30 kann in einem jeweiligen Aufnahmeteil 13 platziert werden. Dies ermöglicht es dem Steckabschnitt 11, das sternförmige Gewindeelement 30 aufzunehmen und anzutreiben, was einen erweiterten Anwendungsbereich bietet.
5. 5. Das Prinzip der Erfindung besteht darin: In Kombination der oben genannten vier Punkten steht die zweite Bogenfläche 122 etwas über der ersten Bogenfläche 121 hervor, so dass zwischen der ersten Bogenfläche 121 und der zweiten Bogenfläche 122 ein erster Abstand 125 besteht. Außerdem ist ein Aufnahmeteil 13 vorgesehen, in dem ein erster Kreis 131 ausgebildet ist. Der erste Kreis 131 ist nicht tangential zur ersten Bogenfläche 121. Das heißt, die zweite Bogenfläche 122 steht etwas hervor, während der Aufnahmeteil 13 etwas eingelassen ist. Durch die zweite Bogenfläche 122 und das Aufnahmeteil 13 wird die Wahrscheinlichkeit, dass der Steckabschnitt 11 die Kanten des Gewindeelements 20 verschleißt, erheblich reduziert. Der erste Abstand 125 ist nur geringfügig kleiner als 0,5 mm, wobei der Außendurchmesser des Hauptkörpers 10 nur geringfügig aufgrund der zweiten Bogenfläche 122 erhöht ist. Der Außenumfang des Hauptkörpers 10 und der Steckabschnitt 11 werden die Kanten des Gewindeelements 20 nicht verschleißen. Der Steckabschnitt 11 stellt ein ausgewogenes Verhältnis zwischen Außendurchmesser und Verschleißfestigkeit dar. Außerdem ist das Zentrum des ersten Kreises 131 an der gleichen Stelle wie der Eckpunkt 147 des zweiten Sechsecks 146. Der Steckabschnitt 11 kann das sternförmige Gewindeelement 30 antreiben, was einen erweiterten Anwendungsbereich bietet.
6. 6. Die zweite Bogenfläche 122 ist bogenförmig und verursacht beim Drehen keine Bissspuren am Gewindeelement 20.
7. 7. Wie in 5 dargestellt, wenn das sechseckige Gewindeelement 20 bereits abgenutzt und leicht abgerundet ist, kann der Hauptkörper 10 das Gewindeelement 20 gegen den Uhrzeigersinn drehen. Der Scheitelpunkt jeder zweiten Bogenfläche 122 des Antriebsteils 12 kann auch an jeder Seitenfläche des Gewindeelements 20 anliegen, um das Gewindeelement 20 zu lösen.

In summary, the following advantages can be achieved with the attachment structure according to the invention:

1. 1. The drive member 12 has the first arcuate surface 121 and the second arcuate surface 122 which extends slightly beyond the first arcuate surface 121 such that there is a first clearance 125 between the first arcuate surface 121 and the second arcuate surface 122 . When the main body 10 rotates the threaded member 20 , every other arcuate surface 122 abuts against each side surface of the threaded member 20 . This results in a clearance between a first arcuate surface 121 and the side surface of the threaded member 20, while the other first arcuate surface 121 is also spaced from the side surface of the threaded member 20. The six edges of the threaded member 20 are each within the range of each female part 13, thereby preventing wear on the six edges of the threaded member 20.
2. 2. The apex of the second arcuate surface 122 extends slightly beyond the apex of the first arcuate surface 121. The first distance 125 is only slightly smaller than 0.5 mm, ie the outer diameter of the main body 10 is only slightly increased due to the second arcuate surface 122 .
3. 3. The receiving part 13 is recessed in an arc shape. Each of the receiving parts 13 is arranged between two first arcuate surfaces 121 each, with a first circle 131 being formed in the receiving part 13 . The first circle 131 and the first arc surface 121 are not tangent. When the main body 10 rotates the threaded member 20, each edge of the threaded member 20 is within the range of each socket 13, respectively.
4. 4. The female part 13 has a first circle 131, the center of the first circle 131 is located at the same place as the corner point 147 of the second hexagon 146. Each of the six round ends of the star-shaped threaded element 30 can be placed in a respective female part 13. This allows the male portion 11 to receive and drive the spider 30, providing an expanded range of applications.
5. 5. The principle of the invention is as follows: Combining the above four points, the second arcuate surface 122 protrudes slightly above the first arcuate surface 121, so that there is a first distance 125 between the first arcuate surface 121 and the second arcuate surface 122. In addition, a receiving part 13 is provided, in which a first circle 131 is formed. The first circle 131 is not tangent to the first arcuate surface 121. That is, the second arcuate surface 122 is slightly protruded while the receiving portion 13 is somewhat recessed. The second arcuate surface 122 and the female part 13 significantly reduce the likelihood of the male portion 11 wearing the edges of the threaded member 20 . The first clearance 125 is only slightly less than 0.5 mm, with the outer diameter of the main body 10 being only slightly increased due to the second arcuate surface 122 . The outer periphery of the main body 10 and the male portion 11 will not wear the edges of the threaded member 20. The male portion 11 strikes a balance between the outer diameter and wear resistance. In addition, the center of the first circle 131 is at the same location as the vertex 147 of the second hexagon 146. The male portion 11 can drive the star-shaped thread member 30, providing an expanded range of applications.
6. 6. The second arcuate surface 122 is arcuate and will not cause bite marks on the threaded member 20 when rotated.
7. 7. As in 5 As shown, when the hexagonal thread member 20 is already worn and slightly rounded, the main body 10 can rotate the thread member 20 counterclockwise. The apex of each second arcuate surface 122 of the drive member 12 may also abut each side surface of the threaded member 20 to loosen the threaded member 20.

The foregoing description is illustrative of the embodiments of the invention and is not intended to be the limit claims. All equivalent changes and modifications which can be made by a person skilled in the art in accordance with the description and drawings of the invention belong to the scope of the present invention.

Reference List

10

main body

11

mating section

12

drive part

121

first arc surface

122

second arc surface

123

first radius

124

second radius

125

first distance

126

second distance

13

recording part

131

first circle

132

third radius

14

first midpoint

141

second circle

142

first hexagon

143

first vertical line

144

third distance

145

fourth distance

146

second hexagon

147

vertex

20

threaded element

30

star-shaped thread element

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• US20070125204 A1 [0002, 0003]
• US 3584667 [0017]

Claims (7)

Attachment structure of a hand tool having a main body (10), characterized in that - the main body (10) has a male portion (11), the male portion (11) having six driving parts (12) and six receiving parts (13), and wherein the six driving parts (12) and the receiving parts (13) are arranged at a regular interval from each other around the axis of the main body (10); - that the drive part (12) is designed in a convexly curved shape and has two first arcuate surfaces (121) and a second arcuate surface (122), the second arcuate surface (122) being in the middle of the drive part (12) and between the two first arcuate surfaces (121), and wherein the second arcuate surface (122) is more convex than the first arcuate surface (121), so that every two first arcuate surfaces (121) can be separated by the second arcuate surface (122); - that the first arcuate surface (121) has a first radius (123) and the second arcuate surface (122) has a second radius (124), the first radius (123) being greater than the second radius (124), and the ratio between the value of the first radius (123) and the value of the second radius (124) is greater than 3 to 1, or the ratio is greater than 2 to 1, and wherein the first arcuate surface (121) is a horizontal line and the second arcuate surface (122) is also tangent to a horizontal line, and there is a first distance (125) between the two horizontal lines which is less than 0.7 mm, or less than 0.6 mm, or less than 0.5 mm, and wherein the two ends of the second arcuate surface (122) have a second spacing (126); - that the receiving part (13) is in the form of a concave arcuate surface, each receiving part (13) being positioned between the two first arcuate surfaces (121), and the receiving part (13) forming a first circle (131), the first circle (131) and the first arcuate surface (121) are not tangent, and wherein the first circle (131) has a third radius (132) less than the first radius (123) or less than the second radius (124 ) and wherein the receiving part (13) is formed in the shape of a single sheet; - that a first center point (14) forming a second circle (141) is located in the center of the male portion (11), a first hexagon (142) being tangent to the second circle (141) from the outside, and each of the second arcuate surfaces (122) tangent to the second circle (141) and the side of the first hexagon (142), and the first center point (14) has an associated first vertical line (143), and the apex of the second arcuate surface (122) lies on the first vertical line (143), and wherein the centers of the first arcuate surface (121) and the second arcuate surface (122) also lie on the first vertical line (143); - that there is a third distance (144) between opposite sides of the first hexagon (142), each side of the first hexagon (142) being defined by a length referred to as the fourth distance (145), and the fourth distance (145) is between 3 and 5 times the third distance (126), or between 3.7 and 4.3 times the third distance (126). - that the second hexagon (146) is located about the first center point (14), the second hexagon (146) being smaller than the first hexagon (142), and the sides of the second hexagon (146) being parallel to the sides of the first hexagon (142), and wherein the second hexagon (146) has six vertices (147), each of which is at the same position as the center of the first circle (131), and each vertex (147) of the second hexagon (146) corresponds to the center of the circle defined by the third radius (132). essay structure claim 1 , characterized in that the main body (10) has a torx key structure, which is used as an attachment structure for various hand tools. essay structure claim 1 , characterized in that the main body (10) is designed as a ratchet structure which is rotatably arranged on a ratchet wrench. essay structure claim 1 , characterized in that the main body (10) is designed as a nut. essay structure claim 1 , characterized in that the main body (10) is connected to a T-handle wrench or a universal joint. essay structure claim 1 , characterized in that the main body (10) is designed as an open-end wrench or pipe wrench. essay structure claim 1 , characterized in that the receiving part (13) is formed in the shape of a concave arcuate surface, each receiving part (13) being positioned between the two first arcuate surfaces (121), and a first circle (131) in the receiving part (13) is located, wherein the first circle (131) and the first arcuate surface (121) are tangentially aligned with each other, while the receiving part (13) and the first arcuate surface (121) are not in such a manner tangentially related to each other, and the receiving part (13) has a radius larger than that of the first circle (131). The receiving part (13) lies on the same position as the center of the first circle (131), and the receiving part (13) is formed in the shape of a single arc.

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