TWI763504B - Torsion structure - Google Patents

Abstract

The invention relates to a torsion structure, which comprises: a first main body part is provided with an accommodating groove; a second main body part is provided with a driving part, a plurality of first fixing parts and a first end surface; an elastic member; a The locking assembly includes a locking piece, a plurality of fixing pieces and a first washer; the locking piece is provided with a first pivot part, a plurality of second fixing parts and a second end surface; the fixing piece is assembled on the first fixing part The locking part and the second fixing part are assembled together with the second body; the first washer is sleeved on the locking part, the first washer has elasticity, and the first washer is elastic Abutting between the first end surface and the second end surface to push the second body and the locking piece apart from each other, the first washer can reduce the gap between the locking piece and the second body.

Description

Torsion structure

The present invention relates to a torsion structure, especially a torsion structure in which, under the elastic action of the first washer, the second body and the locking member are pushed apart from each other, so that the fixing member abuts against the first washer. The surface and the second surface can eliminate the gap between the second body and the locking piece, so that the torsion structure has the dual functions of easy assembly and elimination of the gap, and has the advantages of the best of both worlds.

According to our previous knowledge, the conventional torque structure, such as the US patent case number: US6463834B2, the patent case structure is: a torque wrench 10, the torque wrench 10 includes:

a first body 20, one end of the first body 20 is provided with a driving part 21 in the shape of a quadrangular head;

A second body 30, the second body 30 is pivoted with the first body 20, the first body 20 is partially accommodated at one end of the second body 30, and the driving part 21 is protruding from the first body 20 Outside of the two main bodies 30 , the second main body 30 is in the shape of a hollow round rod. The outer peripheral surface of the other end of the second main body 30 is provided with a plurality of positioning portions 33 , and the plurality of positioning portions 33 are connected to the first main body 20 . Away from each other, the plurality of positioning portions 33 are arranged in a ring shape with the axis of the second body 30, each positioning portion 33 is in the shape of a concave arc groove, and the second body 30 is provided with two fixing portions 34. Each fixing portion 34 is in the shape of a round hole;

An elastic piece 50 is accommodated in the second body 30 , and the elastic piece 50 springs against the first body 20 and the second body 30 , so that the first body 20 has a torsional jump the effect of removal;

a fixing seat 74, the fixing seat 74 is fixed with the second body 30 and hidden in the second body 30;

A plurality of fixing pieces 75, the fixing pieces 75 are arranged at the fixing portion 34 and the fixing seat 74, so that the fixing seat 74 is fixed with the second body 30, the fixing pieces 75 are in the shape of a rounded body or a bead body shape.

But the lack of this conventional torsion structure is:

1. The plurality of fixing pieces 75 are assembled at the fixing portion 34 and the fixing seat 74. The fixing pieces 75 commonly used in the industry are in the shape of a tip or a bead. If the fixing piece 75 is a tip as shown in FIG. 2 The fixing member 75 needs to be assembled at the fixing portion 34 and the fixing seat 74 by external force, that is, there is a tight fitting structure between the three, and there is no relative tolerance between the second body 30 and the fixing seat 74 , the rotation adjustment torque of the screw 70 will be more accurate, which is its advantage, but the external force, such as hydraulic assembly, to set the fixing member 75 requires other machines, which is more labor-intensive and the purchase of the machine is Its disadvantage is that if the fixing member 75 is in the shape of a bead, the hole of the fixing portion 34 and the fixing seat 74 will be slightly larger than the outer diameter of the fixing member 75, that is, the three are loosely fitted, and the fixing member 75 is It is directly placed in the hole of the fixing portion 34 and the fixing seat 74 without using external force for assembly, which is an advantage. However, after the second body 30 and the fixing seat 74 are assembled, there will be tolerances. When the 70 rotates, there will be a lack of adjustment torque and tolerance, and another lack will occur. The fixing member 75 has its own lack of use of the tip body or the bead body, and it is impossible to have the best of both worlds.

2. The screw 70 and the fixing seat 74 are assembled and then accommodated in the second body 30. The fixing The component 75 is then accommodated on the fixing portion 34 and the fixing seat 74. At this time, the second body 30 and the fixing seat 74 need to be pressed against the two fixing components 75 at the same time. For assembly, it is more troublesome to use second hand and use together. If the number of the fixing members 75 is three, the assembly of the fixing members 75 is more troublesome.

In view of the above-mentioned shortcomings of the conventional structure, the inventor of the present invention has finally developed a product with a torsion structure that can solve the drawbacks of the conventional structure with years of experience in manufacturing, production and design in related industries.

In the conventional torsion structure, the use of the tip body or the bead body for the fixing member has its own shortcomings, and it is impossible to have the best of both. In the torsion structure of the present invention, under the elastic action of the first washer, the second body and the locking member are pushed apart from each other, so that the fixing member is pressed against the first surface and the second surface, so that the The gap between the second body and the locking piece is eliminated, so that the torsion structure has the dual functions of easy assembly and elimination of the gap, and has the advantages of the best of both worlds.

The invention relates to a torsion structure, which comprises: a first main body part is provided with an accommodating groove; a second main body part is provided with a driving part, a plurality of first fixing parts and a first end surface; an elastic member; a The locking assembly includes a locking piece, a plurality of fixing pieces and a first washer; the locking piece is provided with a first pivot part, a plurality of second fixing parts and a second end surface; the fixing piece is assembled on the first fixing part The locking part and the second fixing part are assembled together with the second body; the first washer is sleeved on the locking part, the first washer has elasticity, and the first washer is elastic abutting between the first end face and the second end face, so that the second The body and the locking piece are pushed apart from each other, and the first washer can reduce the gap between the locking piece and the second body.

The first fixing portion, the second fixing portion and the fixing piece are loosely fitted, so it is convenient to assemble the plurality of fixing pieces. The first washer springs against the first end face and the second fixing piece. Between the end faces, under the elastic action of the first washer, the second body and the locking piece are pushed apart from each other, so that the fixing piece is pressed against the first and second faces, so that the second body and the locking piece are pushed apart from each other. The gap between the main body and the locking piece is eliminated. Under the elastic action of the first washer, the torsion structure has the dual functions of easy assembly and elimination of the gap, and has the best of both worlds.

In order to make the committee members and those skilled in the art fully understand the effect of the present invention, the structure and composition of the present invention are explained in the following in conjunction with the drawings and drawing numbers, but the following descriptions are only used to explain the implementation of the present invention For example, it is not intended to limit the present invention in any form, and any modification and change made under the spirit of the present invention should still belong to the protection scope of the present invention.

10: The first body

11: accommodating slot

20: The second body

21: Drive Department

23: The first fixed part

24: The first ring groove

25: The first end face

28: Elastic

30: Lock Group

31: Locks

311: The first pivot

312: Second fixed part

313: Positioning slot

314: Bead slot

315: Second end face

32: Fixtures

33: The first bead

34: First washer

40: The first buckle

51: first diameter

52: Second Diameter

53: Third Diameter

54: The first side

55: Second side

Fig. 1 is an exploded perspective view of the torsion structure of the present invention.

Fig. 2 is an exploded perspective view of some components of the torsion structure of the present invention.

Fig. 3 is an exploded perspective view of the torsion structure locking group of the present invention.

Fig. 4 is a three-dimensional combined view of some elements of the torsion structure of the present invention.

Fig. 5 is a side view of some components of the torsion structure of the present invention.

FIG. 6 is a cross-sectional view of the present invention at A-A of FIG. 5 .

Fig. 7 is an enlarged view of the position B of Fig. 6 of the present invention.

FIG. 8 is a three-dimensional combined view of some components of the second embodiment of the present invention.

FIG. 9 is an exploded perspective view of some components of the third embodiment of the present invention.

FIG. 10 is an exploded perspective view of the locking group according to the fourth embodiment of the present invention.

FIG. 11 is an exploded perspective view of the locking group according to the fifth embodiment of the present invention.

Fig. 12 is an exploded perspective view of some components of the sixth embodiment of the present invention.

First, please refer to FIGS. 1 to 3 . FIG. 1 is an exploded perspective view of the torsion structure of the present invention, FIG. 2 is an exploded perspective view of some components of the torsion structure of the present invention, and FIG. 3 is a perspective view of the torsion structure locking group 30 of the present invention. Exploded view, the present invention relates to a torsion structure comprising:

A first body 10, the first body 10 can be rotated to adjust the torsion value of the torsion structure, the first body 10 is for holding by hand, an accommodating groove 11 is formed inside the first body 10, the The accommodating groove 11 runs through or does not penetrate the first body 10 , and the accommodating groove 11 is in the shape of a hollow circular groove;

A second body 20, as shown in FIG. 2, the second body 20 is in the shape of a round rod, the second body 20 is assembled with the first body 10, or the second body 20 is combined with The first body 10 is pivoted, or the second body 20 is fixed to the first body 10 , the second body 20 is partially accommodated in the accommodating groove 11 , and the second body 20 is A display group is provided. The display group has a displacement function to display the torque value of the torsion structure. The second body 20 is provided with a driving part 21. The driving part 21 is assembled at one end of the second body 20. The The driving part 21 is protruded from the first Outside the main body 10, the driving part 21 is a ratchet wrench structure, a Torx wrench structure or an open-ended wrench structure with a four-cornered head. The second main body 20 is provided with a plurality of first fixing parts 23, and the first fixing parts 23 are in the Round hole shape, the first fixing part 23 is hidden in the accommodating groove 11 , the first fixing part 23 is arranged near the opening of the second body 20 , and the first fixing part 23 is connected to the driving part 21 are away from each other, the plurality of first fixing parts 23 are arranged in a ring shape with the axis of the second body 20, the number of the first fixing parts 23 is two, and the two first fixing parts 23 are in phase with each other. Symmetrical, the outer peripheral surface of the second body 20 is annularly provided with a first annular groove 24, the first annular groove 24 is in communication with the plurality of first fixing portions 23, and the first annular groove 24 is located in the first annular groove 24. On one side of the fixing portion 23, the first ring groove 24 is in the shape of a concave arc ring groove, and the opening of the second body 20 is provided with a first end surface 25, and the first end surface 25 is in the shape of a plane;

An elastic piece 28 is accommodated and springs against the second body 20 , and one end of the elastic piece 28 springs against the jump control element in the second body 20 , so that the second body 20 and the first body 10 have the effect of torsion tripping, and the elastic member 28 is a spring structure;

A locking group 30 , as shown in FIG. 3 , is assembled with the second body 20 , the locking group 30 cannot be displaced or rotated relative to the second body 20 , and the locking group 30 is accommodated in the accommodating groove 11 , the locking group 30 includes a locking piece 31 , a plurality of fixing pieces 32 , a plurality of first balls 33 and a first washer 34 ;

The locking piece 31 is assembled at the end of the second body 20 , the locking piece 31 is hidden in the accommodating groove 11 , the locking piece 31 cannot be displaced or rotated relative to the second body 20 , the locking piece 31 is The locking member 31 is separated from the driving portion 21, and the locking member 30 is provided with a first pivot portion 311. The first pivoting portion 311 penetrates the locking member 30. The first pivoting portion 311 is in the shape of a circular groove. or the first pivot 311 is internally provided with screw threads, which is the difference in the basic structural principle of the torsion structure. The locking member 31 is provided with a plurality of second fixing portions 312, and each second fixing portion 312 is connected to each first fixing portion 23. Relatively positive, the second fixing portion 312 is in the shape of a circular hole, the second fixing portion 312 is in the shape of a stepped circular hole, and the number of the second fixing portion 312 is matched with the number of the first fixing portion 23 . One end of the locking member 31 is provided with a plurality of positioning grooves 313 , the plurality of positioning grooves 313 are protruded outside the second body 20 , and the plurality of positioning grooves 313 are arranged in a ring shape with the axis of the locking member 31 . The number of the grooves 313 is ten, twelve or twenty, each positioning groove 313 is in the shape of a concave arc groove, and a bead-accommodating groove 314 is provided at the end of the locking member 31 . The bead-accommodating groove 314 It is located near the opening of one end of the first pivot portion 311 , the bead receiving groove 314 is away from the positioning groove 313 , the bead receiving groove 314 is in the shape of a concave ring groove, and the locking member 31 is provided with a second end surface 315, the second end surface 315 is opposite to the first end surface 25, there is a space between the second end surface 315 and the first end surface 25, the second end surface 315 is connected to the plurality of second fixing parts 312 Between the plurality of positioning grooves 313, the second end surface 315 is flat;

The fixing part 32 is assembled at the first fixing part 23 and the second fixing part 312 , so that the locking part 31 is assembled with the second body 20 , and the number of the fixing parts 32 is the same as that of the first fixing part 31 . The number of the fixing portion 23 and the second fixing portion 312 is matched, and the fixing member 32 is in the shape of a bead or a tip;

The first fixing portion 23, the second fixing portion 312 and the fixing member 32 are loosely fitted;

The plurality of first bead bodies 33 are accommodated in the bead receiving groove 314, and each first bead body 33 can roll naturally in the bead receiving groove 314. Body shape or tip body shape;

The first washer 34 is sleeved on the locking member 31 , the first washer 34 is an elastic or similar element with elasticity, and the first washer 34 is resilient against the first end surface 25 and the second end surface 315 between the second body 20 and the locking piece 31, the first washer 34 can reduce the gap between the locking piece 31 and the second body 20, and the first washer 34 is in the shape of ring shape;

As shown in FIG. 7 , the diameter of the first fixing portion 23 is a first diameter 51 , the diameter of the second fixing portion 312 is a second diameter 52 , and the diameter of the fixing member 32 is a first diameter 51 . Three diameters 53, the first diameter 51 is slightly the same as the second diameter 52, the length of the third diameter 53 is smaller than the first diameter 51 and the second diameter 52, that is, the first fixing part 23, the The second fixing portion 312 and the fixing member 32 are loosely fitted. The first fixing portion 23 has a first surface 54 , and the second fixing portion 312 has a second surface 55 . Under the elastic action of the washer 34, the second body 20 is slightly displaced in the direction of the driving portion 21, or the locking member 31 is displaced further outward, that is, the second body 20 and the locking member 31 are pushed apart from each other, The fixing member 32 is pressed against the first surface 54 and the second surface 55, that is, as shown in FIG. 7, the fixing member 32 is clamped between the first surface 54 and the second surface 55, so that the The gap between the second body 20 and the locking member 31 will be eliminated to form a tight fit;

A first retaining ring 40, the first retaining ring 40 is assembled at the first ring groove 24, the first retaining ring 40 is pressed against the plurality of fixing members 32, so that each fixing member 32 is not fastened Out of each first fixing portion 23 , the first retaining ring 40 is abutted between the first body 10 , the second body 20 and the fixing member 32 , and the first retaining ring 40 is a metal circle. Ring-shaped, the first buckle 40 has internal buckle elasticity.

Please continue to refer to FIG. 4, which is a three-dimensional view of some components of the torsion structure of the present invention In the assembly diagram, the driving part 21 is assembled at one end of the second body 20 , the elastic member 28 is accommodated in the second body 20 , the locking group 30 is assembled at the other end of the second body 20 , the The second end surface 315 is opposite to the first end surface 25 , and the plurality of fixing members 32 are assembled at the first fixing portion 23 and the second fixing portion 312 , so that the locking group 30 cannot be opposed to the second body 20 is displaced or rotated, the first retaining ring 40 is fastened to the first ring groove 24 , and the first retaining ring 40 is pressed against the plurality of fixing members 32 .

Please continue to refer to FIG. 5 to FIG. 7 , FIG. 5 is a side view of some components of the torsion structure of the present invention, FIG. 6 is a cross-sectional view of A-A of FIG. 5 of the present invention, and FIG. 7 is an enlarged view of B of FIG. 6 of the present invention. As shown in FIG. 7 , the fixing member 32 is clamped between the first surface 54 and the second surface 55 , the first retaining ring 40 is pressed against the plurality of fixing members 32 , and the fixing member 32 It is limited by the first retaining ring 40 , the first surface 54 and the second surface 55 and cannot come out of the first fixing portion 23 and the second fixing portion 312 .

Please continue to refer to FIG. 8. FIG. 8 is a three-dimensional combined view of some components according to the first embodiment of the present invention. In this embodiment, the length of the plurality of positioning grooves 313 is doubled, or the plurality of positioning grooves 313 can be For any length, generally the first body 10 is displaced relative to the second body 20 .

Please continue to refer to FIG. 9. FIG. 9 is an exploded perspective view of some components of the third embodiment of the present invention. In this embodiment, the second body 20 is not provided with the first ring groove 24 and the first buckle. Ring 40.

Please continue to refer to FIG. 10 . FIG. 11 is an exploded perspective view of the locking group 30 according to the fourth embodiment of the present invention. In this embodiment, the first washer 34 is in the shape of a wavy ring and has elasticity.

Please continue to refer to FIG. 11 . FIG. 11 is an exploded perspective view of the locking group 30 according to the fifth embodiment of the present invention. In this embodiment, the first washer 34 is a spring structure or similar structure and has elasticity.

Please continue to refer to FIG. 12. FIG. 12 is an exploded perspective view of some components of the sixth embodiment of the present invention. In this embodiment, the second body 20 is provided with a plurality of scales arranged at intervals, and the locking group 30 The plurality of positioning grooves 313 are not provided. Generally speaking, the first body 10 is rotated and displaced relative to the second body 20 , that is, it is applied to a torque wrench structure of another driving structure.

The advantages of the torsion structure of the present invention are:

1. The first fixing portion 23, the second fixing portion 312 and the fixing piece 32 are loosely fitted, so the plurality of fixing pieces 32 can be easily assembled, and the first washer 34 is elastically pressed against the fixing piece 32. Between the first end surface 25 and the second end surface 315, under the elastic action of the first washer 34, the second body 20 and the locking member 31 are pushed apart from each other, so that the fixing member 32 abuts against the first On one surface 54 and the second surface 55, the fixing member 32 is clamped between the first surface 54 and the second surface 55, so that the gap between the second body 20 and the locking member 31 is eliminated and the gap is eliminated. Equivalent to a tight fit, under the elastic action of the first washer 34 , the torsion structure has the dual functions of easy assembly and clearance elimination, and has the best of both worlds.

2. After the fixing member 32 is assembled, the first retaining ring 40 is assembled on the first ring groove 24, and the fixing member 32 can be restrained by the first retaining ring 40 without falling out of the first fixing member In addition to the portion 23 and the second fixing portion 312 , the second body 20 , the locking group 30 and the plurality of fixing members 32 are more easily assembled in the accommodating slot 11 .

3. The first buckle 40 is fastened to the second body 20 and the fixing member 32, and the fixing member 32 Restricted by the first retaining ring 40 , the first retaining ring 40 has the effect of restricting the fixing member 32 .

4. The locking piece 31 is a single element, and the locking piece 31 has the advantage of low processing cost, or the locking piece 31 can be directly formed by injection molding and then the second fixing portion 312 can be drilled.

5. The first washer 34 of the locking group 30 pushes the second body 20 toward the driving portion 21, so that the first surface 54 abuts on the fixing member 32, and the fixing member 32 locks the Between the first surface 54 and the second surface 55 , the first retaining ring 40 is pressed against the plurality of fixing members 32 , and the fixing members 32 are limited by the first retaining ring 40 and the first surface 54 The second body 20 and the locking group 30 have a better assembly structure because the second surface 55 cannot escape from the first fixing portion 23 and the second fixing portion 312 .

Therefore, the torsion structure of the present invention has industrial applicability, novelty and progress, and can sincerely meet the application requirements for an invention patent, and an application can be filed in accordance with the law.

10: The first body

11: accommodating slot

20: The second body

30: Lock Group

Claims (12)

A torsion structure comprising: a first body, an accommodating groove is arranged inside the first body; A second body, the second body is assembled with the first body, the second body is partially accommodated in the accommodating groove, the second body is provided with a driving part, the second body is A plurality of first fixing parts are arranged, the first fixing parts are hidden in the accommodating groove, and a first end surface is arranged at the opening of the second body; an elastic piece, the elastic piece is accommodated and springs against the second body, and one end of the elastic piece is elastically pressed against the second body, so that there is a torsion jump between the second body and the first body the effect of removal; A locking group, the locking group is assembled with the second body, the locking group cannot be displaced or rotated relative to the second body, the locking group is accommodated in the accommodating groove, and the locking assembly includes a locking piece, a plurality of fixing pieces and a first washer; The locking member is assembled at the end of the second body, the locking member is hidden in the accommodating groove, the locking member cannot be displaced or rotated relative to the second body, and the locking member is connected to the driving portion Away from each other, a first pivot portion is arranged in the locking member, a plurality of second fixing portions are arranged on the locking member, each second fixing portion is opposite to each first fixing portion, and the locking member is provided with a a second end face, the second end face is opposite to the first end face, and there is a space between the second end face and the first end face; the fixing part is assembled at the first fixing part and the second fixing part, so that the locking part is assembled with the second body; The first fixing portion, the second fixing portion and the fixing piece are loose fitting structures; The first washer is sleeved on the locking member, the first washer has elasticity, and the first washer is elastically pressed between the first end surface and the second end surface, so that the second body and the locking member Pushed apart from each other, the first washer can reduce the gap between the locking piece, the fixing piece and the second body. The torsion structure of claim 1, wherein the first body can be rotated to adjust the torsion value of the torsion structure, the first body can be held by a hand, and the accommodating groove penetrates or does not penetrate the first body. a main body, the accommodating groove is in the shape of a hollow circular groove; the second main body is in the shape of a round rod, the second main body is pivoted with the first main body, or the second main body is in the shape of the first main body The main body is fixed; the elastic piece is a spring structure. The torsion structure of claim 1, wherein the second main system is provided with a display group, and the display group has a displacement function to display the torsion value of the torsion structure. The torsion structure as claimed in claim 1, wherein the driving part is assembled on one end of the second body, the driving part is protruding from the first body, and the driving part is a ratchet wrench with a four-cornered head The structure, the Torx wrench structure or the open-end wrench structure, the first fixing part is arranged near the opening of the second body, the first fixing part is away from the driving part, and the plurality of first fixing parts are connected with the first fixing part. The axes of the two main bodies are arranged in a ring shape, the number of the first fixing parts is two, and the two first fixing parts are relatively symmetrical. The torsion structure according to claim 1, wherein the first fixing portion is in the shape of a round hole; the second fixing portion is in the shape of a round hole, or the second fixing portion is in the shape of a stepped round hole, and the second fixing portion is in the shape of a round hole. The number of the fixing parts is matched with the number of the first fixing parts; the number of the fixing parts is matched with the number of the first fixing part and the second fixing part, and the fixing parts are bead-shaped or pin-shaped shape. The torsion structure as claimed in claim 1, wherein a first annular groove is formed on the outer peripheral surface of the second body, the first annular groove is in communication with the plurality of first fixing portions, and the first annular groove It is located on one side of the first fixing part, and the first ring groove is in the shape of a concave arc ring groove; The ring is pressed against the plurality of fixing pieces, so that each fixing piece does not come out of each first fixing part, and the first buckle is pressed against the first body, the second body and the fixing piece. Meanwhile, the first buckle is in the shape of a metal circular ring, and the first buckle is slightly elastic. The torsion structure as claimed in claim 1, wherein the first end surface is flat; the second end surface is flat. The torsion structure of claim 1, wherein the first pivot portion penetrates the locking member, the first pivot portion is in the shape of a circular groove, or the first pivot portion is provided with screw threads. The torsion structure according to claim 1, wherein one end of the locking member is provided with a plurality of positioning grooves, the plurality of positioning grooves are protruded outside the second body, and the plurality of positioning grooves are formed with the axis of the locking member. In a ring-shaped arrangement, the number of the positioning grooves is ten, twelve or twenty, and each positioning groove is in the shape of a concave arc groove. The torsion structure as claimed in claim 1, wherein a bead accommodating groove is set at the end of the locking member, the bead accommodating groove is set at an opening near one end of the first pivot portion, and the bead accommodating groove is a concave ring The locking group is provided with a plurality of first bead bodies, the plurality of first bead systems are accommodated at the bead-accommodating groove, and each first bead system can roll naturally at the bead-accommodating groove, and the first bead system The system is round, bead or tip. The torsion structure according to claim 1, wherein the first washer is in the shape of a ring, or the first washer is in the shape of a wavy ring and has elasticity, or the first washer is an elastic Spring structure or similar structure and elastic. The torsion structure of claim 1, wherein the diameter of the first fixing portion is a first diameter, the diameter of the second fixing portion is a second diameter, and the diameter of the fixing member is a third diameter Diameter, the first diameter is slightly the same as the second diameter, the length of the third diameter is smaller than the first diameter and the second diameter, that is, the first fixing part, the second fixing part and the fixing part There is a loose fit structure. The first fixing part has a first surface, and the second fixing part has a second surface. Under the elastic action of the first washer, the second body is slightly moved toward the The driving part is displaced in the direction, or the locking piece is displaced further outward, that is, the second body and the locking piece are pushed apart from each other, so that the fixing piece abuts against the first surface and the second surface, the fixing piece The system is clamped between the first surface and the second surface, so that the gap between the second body and the locking piece is eliminated.

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