TW201713464A - Opening wrench using the long edge surface of the anti-take off section to approach the exterior side of the fastener so as to effectively support the fastener - Google Patents

Abstract

The invention provides an opening wrench, in which its head is disposed with a first datum line, and the wrench opening is used for joining a fastener and tightly fastening the fastener to rotate at a rotation center. The wrench opening has two parallel internal side walls, and each inner side wall, within the width range of the exterior side of correspondingly fastener, is disposed with an anti-take off section, a concave arc section and a straight line section connected between the anti-take off section and the concave arc section. The lengths of the anti-take off section, the straight line section and the concave arc section corresponding to the first datum line approximately equal to the width of the exterior side of the fastener, wherein the length of the anti-take off section corresponding to the first datum line is greater than the length of the concave arc section corresponding to the first datum line. The length of the concave arc section corresponding to the first datum line is greater than the length of the straight line section corresponding to the first datum line. Accordingly, the opening wrench can avoid sliding relative to the fastener in the operating process.

Description

Open end wrench

The present invention relates to an open end wrench, and more particularly to an open end wrench that avoids slipping relative to the fastener.

Pressing, the open end wrench usually has a U-shaped wrench on the head, and a symmetric abutting surface is provided on both sides of the inner edge of the wrench to abut the edge of the fastener such as a hexagonal screw and through the opening The wrench is driven to achieve the purpose of loosening or locking the fastener.

However, in fact, the size of the wrench is slightly larger than the outer edge of the fastener, so that the fastener can be inserted into the wrench. Therefore, when the fastener is inserted into the wrench, a gap is formed between the two abutting surfaces. In the operation process, the abutting surface is easy to slip with the fastener, affecting the smoothness of the locking or loosening of the fastener; moreover, when the abutting surface and the fastener slip, it is easy to make the end angle of the fastener abut Face contact, in this case, the end angle of the fastener is liable to cause wear and become rounded or broken.

Therefore, how to improve the shortcomings of the aforementioned open-end wrench is a problem to be solved by the present invention.

In order to solve the above problems, the present invention discloses an open-end wrench, which is provided with a retaining portion on two inner side walls of the wrench to provide a driving operation, and the outer side of the fastener is supported on the long side of the retaining portion. According to the increase of the contact area, the opening wrench is prevented from slipping relative to the fastener.

In order to achieve the above object, the present invention provides an open-end wrench having a handle and a head extending from one end of the handle. The head is provided with a wrench and a first reference line, and the wrench is used for fastening. Firmware, and can pull the fastener to rotate in a center of rotation; the wrench has two parallel inner sidewalls, the two inner sidewalls are parallel to the first reference line, and are symmetrically spaced by the first reference line, and the inner side walls are respectively correspondingly tight Two opposite outer sides of the firmware, and each inner side wall is provided with a retaining portion, a concave arc segment and a straight line connecting the retaining portion and the concave arc portion within a width of the opposite outer side surface of the fastener The section of the anti-off section is closer to the opening of the wrench than the straight section, and the length of the anti-off section, the straight section and the concave arc corresponding to the first reference line is substantially equal to the width of the outer side of the fastener, wherein the anti-off section corresponds to The length of the first reference line is greater than the length of the concave arc corresponding to the first reference line, and the length of the concave arc corresponding to the first reference line is greater than the length of the straight line segment corresponding to the first reference line.

Wherein, the ratio of the length of the anti-off section, the straight section and the concave arc corresponding to the first reference line is 10:7:8.

Wherein, each inner side wall is sequentially provided with a first end point, a second end point, a third end point and a fourth end point from the opening of the shank toward the shank, and the two ends of the detachment preventing section are Defining an end point and a second end point, the two ends of the straight line segment are defined by the second end point and the third end point, and the two ends of the concave arc segment are defined by the third end point and the fourth end point, and When pulled, the second end of one of the inner side walls is exactly 1/3 of the outer side of the fastener, and the third end of the other inner side wall is 1/ of the outer side of the other side of the fastener. 5 positions and form point contact.

Wherein, the first reference line passes through the center of rotation, the head has a second reference line perpendicular to the first reference line and passes through the center of rotation, and the second reference line forms an intersection point in the straight line segment, and the length of the intersection point to the concave arc segment is greater than The length of the intersection to the anti-off section.

The anti-detachment section comprises a long side and a short side connected to the long side, the long side of the short side is away from the straight line section, and the long side and the short side are arranged at an angle of 120 to 150 degrees, and the long side is provided by the inner side wall. Tilting inward by 4 to 6 degrees, and when pulled, the long side is in surface contact with the outer side of the fastener, and the short side is used to prevent the fastener from coming off the opening of the wrench.

Among them, the long side is inclined by 5.26 degrees from the inner side wall.

Among them, the long side occupies between 0.85 and 0.9 times the total length of the anti-off section.

Wherein, the inner side wall further has an outer straight section connected to the retaining section and extending toward the opening of the wrench, and the outer straight section is parallel to the first reference line.

Wherein, the straight line segment is parallel to the first reference line, and the distance between the straight line segment and the first reference line is equal to the distance from the outer straight line segment to the first reference line, and the length of the outer straight line segment is greater than the anti-offset portion.

Wherein, the inner end of the two inner side walls is concavely provided with a concave arc-shaped bottom wall, and the bottom wall and the concave arc segment are connected by a convex arc, the convex arc is convex toward the wrench, and the radius of the convex arc is smaller than the concave arc segment. Large radius.

Thereby, the open end wrench of the present invention is configured such that the long side surface of the anti-detachment section contacts the outer side surface of the fastener, effectively supports the fastener and rotates it together, so as to prevent the open end wrench from slipping relative to the fastener to achieve the locking Or loose the purpose of the work.

For the convenience of the description, the central idea expressed by the present invention in the column of the above summary of the invention is expressed by the specific embodiments. The various items in the examples are drawn to scale in the description and not to the actual elements, and are described in the foregoing.

Referring to FIG. 1 to FIG. 4 , the open-end wrench 100 of the present invention has a handle portion 10 and a head portion 11 extending from one end of the handle portion 10 . The head portion 11 is provided with a wrench 20 and a rotation center C. . The wrench 20 is used to sleeve the fastener 200, and the fastener 200 is rotated to rotate the center C to achieve the purpose of locking or loosening. The head 11 further has a first reference line L1 perpendicular to the first reference line L1 and through the center of rotation C through the rotation center C and a second reference line L2. The fastener 200 can be a polygonal screw, such as a hex nut.

The shank 20 has two parallel inner sidewalls 21 on the inner edge. The two inner sidewalls 21 are parallel to the first reference line L1 and are symmetrically spaced apart by a first reference line L1. The two inner sidewalls 21 respectively correspond to the fastener 200. Two opposite outer sides 201, and each inner side wall 21 is provided with a retaining portion 22, a concave arc portion 24 and a connecting to the retaining portion 22 and the concave arc portion 24 within the width of the opposite fastener 200 thereof. The length between the straight section 23, the retaining section 22, the straight section 23 and the concave arc 24 corresponding to the first reference line L1 is substantially equal to the width of the outer side 201 of the fastener 200. The straight section 23 is closer to the first reference line L1 than the recessed section 22 and the concave arc section 24, so that the retaining section 22 and the concave arc section 24 are concave in shape with respect to the straight section 23.

In addition, a first end point A1, a second end point A2, a third end point A3, and a fourth end point A4 are provided in sequence from the opening of the yoke 20 toward the shank 10, and the two ends of the anti-off section 22 The end is defined by the first end point A1 and the second end point A2, the two ends of the straight line segment 23 are defined by the second end point A2 and the third end point A3, and the two ends of the concave arc segment 24 are defined by the third end Point A3 is defined by a fourth endpoint A4.

The length of the anti-offset portion 22 corresponding to the first reference line L1 is greater than the length of the concave arc segment 24 corresponding to the first reference line L1, and the length of the concave arc segment 24 corresponding to the first reference line L1 is greater than the length of the straight line segment 23 corresponding to the first The length of a baseline L1. In the present embodiment, the ratio of the length of the retaining section 22, the straight section 23 and the concave arc 24 corresponding to the first reference line L1 is 10:7:8.

Further, in the present invention, the retaining section 22 is closer to the opening of the wrench 20 than the straight section 23, and the straight section 23 is connected between the retaining section 22 and the concave arc section 24. The anti-detachment section 22 includes a long side 221 and a short side 222 connected to the long side 221. The long side 221 of the short side 222 is away from the straight section 23 and is closer to the opening position of the wrench 20. among them. The long side 221 and the short side 222 are disposed at an angle of 120 degrees to 150 degrees. In addition, the long side 221 occupies between 0.85 and 0.9 times the total length of the retaining portion 22, and the length of the long side 221 is also smaller than the straight line 23 and the concave arc. Segment 24 is long.

The inner side wall 21 further has an outer straight section 25 which is connected to the retaining section 22 at a first end point A1 and extends in the opening direction of the wrench 20, and is parallel to the first reference line L1. The distance between the outer straight line segment 25 and the first reference line L1 is equal to the distance between the straight line segment 23 and the first reference line L1. The length of the outer straight section 25 is greater than the length of the straight section 23, and the length of the outer straight section 25 is also greater than the retaining section 22.

In addition, the long side 221 of the detachment prevention section 22 is inclined inward by 4 to 6 degrees from the inner side wall 21. In the present embodiment, the long side 221 is inclined inward by 5.26 degrees from the inner side wall 21.

In addition, the second reference line L2 forms an intersection point 26 between the straight sections 23 of the two inner side walls 21, and the intersection point 26 divides the straight line section 23 into two sections of different lengths, that is, the length of the intersection point 26 to the concave arc section 24. It is greater than the length of the intersection 26 to the anti-off section 22.

Further, the inner ends of the two inner side walls 21 are concavely provided with a concave arc-shaped bottom wall 27. A convex arc 28 is connected between the bottom wall 27 and the concave arc segment 24. The radius of formation of the convex arc 28 is larger than that of the concave arc segment 24, and is convex toward the center of rotation C, so that the inner side wall 21 and the bottom wall 27 are turned to a larger thickness, and the structure of the open-end wrench 100 is raised. strength.

As shown in FIG. 3, when the open-end wrench 100 is to be rotated by the fastener 200, the handle 10 of the open-end wrench 100 is rotated clockwise with the center of rotation C as a center, so that the open-end wrench 100 is rotated relative to the fastener 200 to a position of 4 degrees. The straight portion 23 of the inner side wall 21 and the second end point A2 of the retaining portion 22 are pre-contacted to the outer side 201 of the fastener 200, and the inner side wall 21 forming the left side of the open wrench 100 is supported at a single point on the fastener 200. Outer side 201.

As shown in FIG. 4, continuing the foregoing, when the open-end wrench 100 is rotated relative to the fastener 200 to an angular position of 5.26 degrees, at this time, the outer side 201 portion of the fastener 200 has entered the range of the retaining portion 22, so that the outer side 201 is The long side 221 of the detachment preventing portion 22 forms a surface-to-surface contact state, and the third end point A3 of the inner side wall 21 on the right side forms a point-to-point contact state with the other outer side surface 201 of the fastener 200, and is short. The edge 222 is used to prevent the fastener 200 from coming out of the opening direction of the wrench 20. As shown in the figure, at this time, the second end point A2 of the left inner side wall 21 is exactly at the 1/3 position of the outer side surface 201 of the fastener 200, and the third end point A3 of the right inner side wall 21 is tight. The outer side 201 of the other side of the firmware 200 is at the 1/5 position and is in point contact. Thereby, the inner side wall 21 of the left side of the open-end wrench 100 applies a thrust force to the fastener 200 in surface contact, and the inner side wall 21 of the right side of the open-end wrench 100 applies a pulling force to the fastener 200 in a point contact, which can effectively To support the fastener 200 and rotate together, the opening wrench 100 is prevented from slipping relative to the fastener 200 to achieve the purpose of locking or loosening.

However, the inner section of the straight section 23 of the present invention (i.e., the intersection 26 to the concave arc 24) is longer than the outer section (i.e., the intersection 26 to the retaining section 22) such that the fastener 200 is located deeper in the wrench 20. To correspond to the thicker wall of the meat of the head 11, thereby providing a better force-applying effect.

As also mentioned above, the length of the concave arc segment 24 of the present invention is longer than that of the straight line segment 23, and during the driving operation, the inner side wall 21 can be prevented from coming into contact with the end corner 202 of the fastener 200 to prevent the occurrence of a corner collapse.

While the invention has been described in terms of a preferred embodiment, the various embodiments may The above embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention. All modifications or changes made without departing from the spirit of the invention are within the scope of the invention.

100‧‧‧opening wrench
11‧‧‧ head
21‧‧‧ inner side wall
221‧‧‧ long side
23‧‧‧ Straight line
25‧‧‧Outline straight line
27‧‧‧ bottom wall
200‧‧‧fasteners
202‧‧‧End angle
L2‧‧‧ second baseline
A1‧‧‧ first endpoint
A3‧‧‧ third endpoint
10‧‧‧ handle
20‧‧‧Watch
22‧‧‧Protection
222‧‧‧ Short side
24‧‧‧ concave arc
26‧‧‧ intersection
28‧‧‧ convex arc
201‧‧‧ outside side
L1‧‧‧ first baseline
C‧‧‧Rotation Center
A2‧‧‧ second endpoint
A4‧‧‧ fourth endpoint

FIG. 1 is a schematic structural view of an open end wrench of the present invention. 2 is a schematic view of the fasteners of the open end wrench of the present invention. [Fig. 3] is a schematic view of the open-end wrench drive fastener of the present invention, showing that the open-end wrench is rotated relative to the fastener to a position of 4 degrees. [Fig. 4] is an enlarged schematic view of the open-end wrench drive fastener of the present invention, showing that the open-end wrench is rotated relative to the fastener to an angular position of 5.26 degrees.

100‧‧‧opening wrench

10‧‧‧ handle

11‧‧‧ head

20‧‧‧Watch

21‧‧‧ inner side wall

22‧‧‧Protection

221‧‧‧ long side

222‧‧‧ Short side

23‧‧‧ Straight line

24‧‧‧ concave arc

25‧‧‧Outline straight line

26‧‧‧ intersection

27‧‧‧ bottom wall

28‧‧‧ convex arc

L1‧‧‧ first baseline

L2‧‧‧ second baseline

C‧‧‧Rotation Center

A1‧‧‧ first endpoint

A2‧‧‧ second endpoint

A3‧‧‧ third endpoint

A4‧‧‧ fourth endpoint

Claims (10)

An open end wrench having a handle and a head extending from one end of the handle, the head being provided with a wrench and a first reference line for connecting a fastener and being capable of being pulled The fastener is rotated at a center of rotation; the wrench has two parallel inner sidewalls, the two inner sidewalls are parallel to the first reference line, and are symmetrically spaced apart by the first reference line, and the two inner sidewalls are respectively opposite The opposite side surfaces of the fasteners should be opposite, and each inner side wall is provided with a retaining section, a concave arc section and a joint preventing section and the concave arc in a width range of the outer side surface of the fastener opposite thereto a straight line segment between the segments, the anti-offlet segment being closer to the opening of the trigger than the straight segment, the length of the anti-off segment, the straight segment and the concave arc corresponding to the first reference line being substantially equal to the tight a width of the outer side surface of the firmware, wherein the length of the anti-offset portion corresponding to the first reference line is greater than the length of the concave arc portion corresponding to the first reference line, and the length of the concave arc segment corresponding to the first reference line is greater than The straight line segment corresponds to the length of the first reference line. The open end wrench of claim 1, wherein the length of the anti-off section, the straight line segment and the concave arc corresponding to the first reference line is 10:7:8. The open end wrench of claim 1, wherein each inner side wall is sequentially provided with a first end point, a second end point, a third end point, and a first direction from the opening of the wrench toward the handle. a four-end end, the two ends of the anti-offset segment being defined by the first end point and the second end point, the two ends of the straight line segment being defined by the second end point and the third end point, the concave arc The two ends of the segment are defined by the third end point and the fourth end point, and when pulled, the second end of one of the inner side walls is exactly 1/3 of the outer side of the fastener, and The third end of the other inner side wall is at the 1/5 position of the outer side of the other side of the fastener and forms a point contact. The open end wrench of claim 1, wherein the first reference line passes through the center of rotation, the head further has a second reference line perpendicular to the first reference line and passes through the center of rotation, the second reference The line forms an intersection point in the straight line segment, and the length of the intersection point to the concave arc segment is greater than the length of the intersection point to the retaining section. The open end wrench of any one of claims 1 to 4, wherein the retaining section includes a long side and a short side connected to the long side, the short side being farther from the straight line than the long side, and The long side and the short side are disposed at an angle of 120 to 150 degrees, and the long side is inclined inward by 4 to 6 degrees by the inner side wall, and when being pulled, the long side forms an outer side surface of the fastener. In the face contact, the short side is used to prevent the fastener from coming off the opening of the wrench. The open end wrench of claim 5, wherein the long side is inclined inward by 5.26 degrees from the inner side wall. The open end wrench of claim 6, wherein the long side occupies between 0.85 and 0.9 times the total length of the retaining section. The open end wrench of claim 5, wherein the inner side wall further has an outer straight section connected to the retaining section and extending toward the opening of the trigger, and the outer straight section is parallel to the first reference line . The open end wrench of claim 8, wherein the straight line segment is parallel to the first reference line, and the distance from the straight line segment to the first reference line is equal to the distance from the outer straight line segment to the first reference line, The length of the outer straight section is greater than the length of the retaining section. The open end wrench of claim 9, wherein the inner ends of the inner side walls are concavely provided with a concave arc-shaped bottom wall, and the bottom wall and the concave arc are connected by a convex arc, and the convex arc faces the The shank is convex, and the radius of the convex arc is larger than the radius of the concave arc.