Tool engagement structure

Abstract

It provides a simple structure that allows tools to be engaged. [Solution] In order to solve the above-mentioned problems, the tool engagement structure of the present invention is characterized in that the main body 10 has a front wall 11, a first side wall 12 and a second side wall 13, a guide groove 14 is formed between the front wall 11, the first side wall 12 and the second side wall 13, the oscillating member 20 has a plate moving end 20A and an oscillating end 20B, a pivot component 20C is provided between the plate moving end 20A and the oscillating end 20B, the oscillating member 20 is pivotally attached to the front wall 11 by the pivot component 20C, the end face of the oscillating end 20B is arc-shaped and a part thereof is inserted into the guide groove 14, when the plate moving end 20A is pulled, the oscillating end 20B moves away from the guide groove 14, the oscillating member 20 is further provided with a guide surface 25 that contacts the end face of the oscillating end 20B, and a return means 30 is provided for driving the oscillating member 20 to its return position.

Description

Technical Field

[0001] This utility model relates to an engagement structure of tools and belongs to the technical field of the engagement structure of tools.

Background Art

[0002] Generally, workers in water supply, electricity, and construction need to carry many working tools such as a measuring tape, power tools, and tool bags during work. However, workers often need to climb to high places or move positions during construction, and they cannot work while holding these tools in their hands. Therefore, generally, workers hang the tools on a work belt for carrying.

[0003] As shown in FIG. 1, a conventional locking device includes a first piece 71, a second piece 72, a hanging tool 73, an insertion member 74, and a stopper 75. The first piece 71 is combined with the second piece 72, and a guide groove 711 is provided in the first piece 71. A guide block 731 is provided on the hanging tool 73, and this is inserted into the guide groove 711. The stopper 75 controlled by the insertion member 74 restricts the guide block 731 so that the hanging tool 73 cannot move within the guide groove 711, forming a structure to prevent removal. When the user presses down the insertion member 74, the stopper 75 is pulled inward, and the hanging tool 73 can be removed. In addition, there is also the prior art described in Patent Document 1.

Prior Art Documents

Patent Documents

[0004]

Patent Document Ⅰ

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, typical workers often cannot stand upright while working and need to maintain a slanted or crouched position. Therefore, it is difficult to apply the appropriate force to the positioning component's retaining part, and the hanger cannot be removed without consciously pressing hard with the thumb. Continuing such operations for extended periods can cause discomfort in the user's fingers and hands. Therefore, a better tool engagement structure is needed.

[0006] Furthermore, other conventional positioning members have complex structures, and because the gaps in the positioning members are open at the front, small fragments and large amounts of dust can easily enter, potentially clogging the gaps, preventing the press buttons from being pressed properly, and causing the entire positioning member to malfunction.

[0007] Taking this a step further, conventional positioning members have a complex internal structure for the retaining button and operate heavily relying on the elastic force of a spring. If elastic fatigue occurs in the spring, the retaining button may not return to its original position completely, impairing the practicality of the positioning member and potentially rendering it completely ineffective.

[0008] Therefore, a simple structure that allows tools to be engaged is required. [Means for solving the problem]

[0009] To achieve the aforementioned objectives, the tool engagement structure of the present invention is: The main body has a front wall, a first side wall and a second side wall. A guide groove is formed between the front wall, the first side wall and the second side wall. The oscillating member has a plate-moving end and an oscillating end, a pivot component is provided between the plate-moving end and the oscillating end, the oscillating member is pivotally mounted to the front wall by the pivot component, the end face of the oscillating end is arc-shaped and a portion thereof is inserted into a guide groove, When the plate moving end is pulled, the oscillating end moves away from the guide groove, and furthermore, the oscillating member is provided with a guide surface that contacts the end face of the oscillating end. The invention is characterized by comprising a return mechanism for driving the oscillating member back to its original position.

[0010] Furthermore, it is preferable that the main body has opposing first and second sides, the extension direction between the first and second sides is transverse, the first side wall is located on one side in the transverse direction along the guide groove, and the second side wall is located on the other side in the transverse direction along the guide groove.

[0011] Furthermore, the second side wall is provided with an upper edge pivoting portion, and a top groove is formed between the upper edge pivoting portion and the front wall. A stopper end surface is provided at one end of the upper edge swinging portion, and an inwardly contracted portion and a convex edge portion are provided adjacent to each other at the swinging end. The aforementioned convex edge portion protrudes from the inwardly contracted portion, and the inwardly contracted portion is provided with an inwardly contracted end face, and the convex edge portion is provided with a convex edge end face. The aforementioned inwardly contracted end face and convex edge end face are arc-shaped, the inwardly contracted end face faces the upper edge pivot portion, and the convex edge end face is inserted into the apex groove. The two opposing ends of the aforementioned inwardly contracted portion are an inner end and an outer end, respectively, with the inner end being closer to the guide groove than the outer end. A stopper projection is provided at the outer end of the inwardly retracted portion, and it is preferable that this stopper projection protrudes from the inwardly retracted end surface and abuts against the stopper end surface.

[0012] Furthermore, the oscillating member has opposing front and back surfaces, the back surface faces the front wall of the main body, and the back surface is provided with an arc-shaped groove, the arc-shaped groove is close to the oscillating end and away from the plate moving end, A first restricting portion is provided at one end of the arc-shaped groove, and a second restricting portion is provided at the other end. The first restricting portion is movable according to the position of the swinging member, and the second restricting portion is fixed. The return means is preferably an elastic body, provided within the arc-shaped groove, with one end of the elastic body in contact with the first limiting portion and the other end in contact with the second limiting portion.

[0013] Furthermore, the arc-shaped groove is an open groove, with a groove wall at one end and an opening at the other end. A limiting plug is provided. The limiting plug penetrates the front wall and is inserted into the arc-shaped groove, is close to the opening, and is away from the groove wall. It is preferable that the first limiting part is the groove wall and the second limiting part is the limiting plug.

[0014] Also, the guiding surface has an inlet end and an outlet end. The outlet end is closer to the first side than the inlet end in the lateral position, the outlet end is closer to the guide groove than the inlet end, and it is preferable that the outlet end is in contact with the swinging end.

[0015] Also, it is preferable that the pivot connecting component is a screw, and the screw penetrates the swinging member and is fastened to the front wall.

[0016] Also, the main body further has a rear wall, an upper connecting wall, and a lower connecting wall. There is a gap between the front wall and the rear wall. One end of the upper connecting wall and the lower connecting wall is connected to the front wall, and the other end is connected to the rear wall. It is preferable that a through hole is formed among the front wall, the rear wall, the upper connecting wall, and the lower connecting wall.

[0017] Also, it is preferable that a first extending part for coupling with another tool engaging structure is provided on the upper connecting wall.

[0018] Also, it is preferable that a second extending part for coupling with another tool engaging structure is provided on the lower connecting wall.

[0019] Also, a first common through hole is provided in the first extending part, and a second extending part is provided on the lower connecting wall. There are two bumps on the second extending part, each provided with a second common through hole, and an assembling space is formed between the two bumps. It is preferable that the first extending part is inserted into this assembling space, and the first common through hole and the second common through hole are communicated, thereby forming a through extending column.

[0020] Furthermore, positioning perforations and positioning screws are provided. It is preferable that the positioning perforations penetrate through the second side wall and the front wall, and the positioning screws are provided in the positioning perforations.

[0021] In addition, a main groove portion, a first side groove, and a second side groove are communicatively provided in the guide groove. A first swing portion is provided on the first side wall, and a second swing portion is provided on the second side wall. It is preferable that a first side groove is formed between the first swing portion and the front wall, and a second side groove is formed between the second swing portion and the front wall.

[0022] Moreover, it is preferable that the guiding surface is inclined toward the guide groove.

Advantages of the Invention

[0023] As is clear from the above, in the present invention, the end face of the swing end is arc-shaped, a part of the swing end is inserted into the guide groove, and the guiding surface contacts the end face of the swing end. When the user needs to take out the swing end from the guide groove, the user only needs to pull the tool upward. Since the protrusion hits the swing end and the end face of the swing end is arc-shaped, and the protrusion is also cylindrical, by simply rotating the tool a little, the protrusion is pushed along the guiding surface of the swing end, the swing end rotates and separates from the guide groove, the protrusion smoothly exits the guide groove, and the tool can be taken out. As a result, the user can easily take out the tool without manually pressing the pivot lever, and the purpose of quickly taking it out can be achieved.

[0024] Also, in the present invention, the elastic body directly abuts against the groove wall of the arc-shaped groove and pushes the swing member, thereby obtaining the technical effect of a simple structure.

Brief Description of the Drawings

[0025] The present utility model will be further described in detail below with reference to the accompanying drawings. [Figure 1] It is a perspective view of a conventional positioning fastener. [Figure 2A]This is a perspective view of the tool engagement structure according to this embodiment. [Figure 2B] This is a perspective view of the tool engagement structure according to this embodiment, from a different viewpoint. [Figure 3] This is a perspective view of the rocking member according to this embodiment. [Figure 4] This is a schematic diagram showing the relationship between the tool engagement structure and the tool according to this embodiment. [Figure 5A] This embodiment is a schematic diagram showing the state in which the projection column is installed within the guide groove. [Figure 5B] This embodiment is a schematic diagram showing how the user rotates the oscillating member by pressing the operating end. [Figure 6] This is a longitudinal cross-sectional view of the tool engagement structure according to this embodiment. [Figure 7A] This embodiment is a schematic diagram showing the state in which the convex column is in contact with the swinging end. [Figure 7B] This embodiment is a schematic diagram showing how the convex column rotates and presses against the guide surface. [Figure 8] This embodiment is a schematic diagram showing the state in which two tool engagement structures are connected and engaged. [Figure 9] In this embodiment, the bolt is shown as a three-dimensional view inserted through a positioning hole. [Figure 10] This is a longitudinal cross-sectional view taken at a different position than that shown in Figure 6 of this embodiment. [Modes for carrying out the invention]

[0026] The following embodiments of the present invention provide a type of tool engagement structure and will be described with reference to Figures 1 to 10.

[0027] As shown in Figure 2A, the main body 10 has a front wall 11, a first side wall 12, and a second side wall 13, and a guide groove 14 is formed between the front wall 11 and the first and second side walls 13. As shown in Figures 4, 5A, and 5B, this guide groove 14 is for slidably arranging the tool 60 and the protruding column 61, and the protruding column 61 is cylindrical with a projection 611 and a wide portion 612 formed at its end. The guide groove 14 has a main groove 141, a first side groove 142, and a second side groove 143 in communication, with the projection 611 located in the main groove 141 and the wide portion 612 inserted into the first and second side grooves 142 and 143.

[0028] As shown in Figure 2A, the main body 10 has a first side 10A and a second side 10B facing each other, and the direction of extension between them is the lateral direction Y. The guide groove 14 extends along the lateral direction Y, and has a first side wall 12 on one side and a second side wall 13 on the other side of the guide groove 14. The first side wall 12 is provided with a first oscillating part 121, and the second side wall 13 is provided with a second oscillating part 131. A first side groove 142 is formed between the first oscillating part 121 and the front wall 11, and a second side groove 143 is formed between the second oscillating part 131 and the front wall 11.

[0029] Furthermore, the second side wall 13 has an upper edge pivot portion 132, and a top groove 15 is formed between this and the front wall 11. This upper edge pivot portion 132 is close to one end of the second side 10B and is provided with a stopper end surface 132A.

[0030] As shown in Figures 2A, 2B, and Figure 3, the oscillating member (pivot member) 20 has opposing plate-moving ends 20A and oscillating ends 20B, and the end face of the oscillating end 20B is arc-shaped. This end face is for securing the protruding column 61 and prevents the protruding column 61 from falling out of the guide groove 14 in the opposite direction. A pivot component 20C is provided between the plate-moving end 20A and the oscillating end 20B, thereby allowing the oscillating member 20 to be rotatably mounted on the front wall 11.

[0031] The oscillating member 20 has opposing front and rear surfaces 21 and 22, with the rear surface 22 facing the front wall 11 of the main body 10 (see Figure 2B). An arc-shaped groove 221 is provided on the rear surface 22, which is positioned closer to the oscillating end 20B and far from the plate moving end 20A. One end of the arc-shaped groove 221 has a first restricting portion 222, and the other end has a second restricting portion 223. The first restricting portion 222 can move according to the position of the oscillating member 20, while the second restricting portion 223 is fixed (see Figures 5A and 5B).

[0032] As shown in Figure 3, the oscillating end 20B is provided with opposing inward-contracted portion 23 and convex edge portion 24, with the convex edge portion 24 protruding in a stepped manner from the inward-contracted portion 23. The inward-contracted portion 23 has an inward-contracted end face 231, and the convex edge portion 24 has a convex edge end face 241. The inward-contracted end face 231 and the convex edge end face 241 are arc-shaped, with the inward-contracted end face 231 facing the upper edge oscillating portion 132, and the convex edge end face 241 being inserted into the top groove 15 (see Figure 5A).

[0033] The two opposing ends of the inwardly retracted portion 23 along the lateral direction Y are the inner end 232 and the outer end 233. The inner end 232 is closer to the guide groove 14 than the outer end 233, and the outer end 233 is provided with a stopper projection 234, which protrudes from the inwardly retracted end surface 231. This stopper projection 234 abuts against the stopper end surface 132A and serves to limit the swing range of the swinging member 20.

[0034] Furthermore, the two opposing ends of the convex edge portion 24 along the lateral direction Y are the swaying end 242 and the outer end 243, with the swaying end 242 being closer to the guide groove 14 than the outer end 243. The swaying end 242 is normally inserted into the guide groove 14, and when the user pulls the plate moving end 20A, the swaying end 242 moves away from the guide groove 14.

[0035] The oscillating member 20 is further provided with a guide surface 25, which contacts and resists the wide portion 612 of the convex column 61, thereby causing the oscillating member 20 to swing. The guide surface 25 is connected to the oscillating end 242 and the inner end 232, and is inclined toward the guide groove 14. The guide surface 25 has an in end 251 and an out end 252, with the out end 252 being closer to the first side 10A than the in end 251 in the lateral direction Y. The in end 251 is close to the guide groove 14, and the out end 252 is located where the convex column 61 slides within the guide groove 14, and the out end 252 is connected to the oscillating end 20B.

[0036] As shown in Figures 2B, 5A, and 5B, the elastic body 30, which is the return mechanism, is installed in the arc-shaped groove 221, with one end of the elastic body 30 in contact with the first limiting portion 222 and the other end in contact with the second limiting portion 223. When the user pulls the plate moving end 20A to swing the oscillating member 20, the first limiting portion 222 gradually moves closer to the second limiting portion 223. The second limiting portion 223 compresses the elastic body 30, and when the user releases the plate moving end 20A, the elastic body 30 provides a return action to the oscillating member 20, returning the oscillating member 20 to its original position.

[0037] In this embodiment, as shown in Figure 2B, the arc-shaped groove 221 is an open groove with a groove wall 221A at one end and an opening 221B at the other end. There is also a limiting plug 223A, which penetrates the front wall 11 and is inserted into the arc-shaped groove 221. The limiting plug 223A is close to the opening 221B and away from the groove wall 221A. Therefore, the first limiting portion 222 is the groove wall 221A, and the second limiting portion 223 is the limiting plug 223A.

[0038] In this embodiment, referring to Figure 2A, the pivot component 20C is a screw, and the screw penetrates the oscillating member 20 and is installed on the front wall 11.

[0039] Please refer to Figure 2A for a preferred embodiment. The main body 10 has a rear wall 16, an upper connecting wall 17, and a lower connecting wall 18. There is a gap between the front wall 11 and the rear wall 16, and one end of the upper connecting wall 17 and the lower connecting wall 18 is connected to the front wall 11, and the other end is connected to the rear wall 16. Perforations 19 are formed between the front wall 11, the rear wall 16, the upper connecting wall 17, and the lower connecting wall 18, and these perforations 19 are for the user to pass the belt L through and fix this tool engagement structure to the belt.

[0040] See Figure 2A for another preferred embodiment. The upper connecting wall 17 is provided with a first extension 171, which is for connecting to another tool engagement structure, and the first extension 171 is provided with a first common perforation 172.

[0041] Refer to Figure 2A for another preferred embodiment. The lower connecting wall 18 is provided with a second extension portion 181, which is for connecting to another tool engagement structure. The second extension portion 181 has two protrusions 182, each provided with a second common perforation 183. There is an assembly space 184 between the two protrusions 182 (see Figure 8), into which the first extension portion of the other tool engagement structure is inserted. The first common perforation 172 communicates with the second common perforation 183, thereby allowing the extension column to be inserted. This structure connects the two tool engagement structures to each other, providing an extension effect.

[0042] See Figures 9 and 10 for another preferred embodiment. A positioning hole 40 and a positioning screw 41 are provided, with the hole 40 penetrating the second side wall 13 and the front wall 11. The positioning screw 41 is inserted into the drilled hole 19 through the hole 40 and serves to secure the user's belt L.

[0043] As mentioned above, please refer to Figures 7A and 7B. The present invention functions by making the end face of the oscillating end 20B arc-shaped, a part of which is inserted into the guide groove 14, and the guide surface 25 contacting the end face of the oscillating end 20B. Therefore, when the user removes the tool 60 from the guide groove 14 of the main body 10, simply lifting the tool 60 upwards causes the protruding column 61 to hit the oscillating end 20B. However, since the end face of the oscillating end 20B is arc-shaped and the protruding column 61 is cylindrical, as shown in Figure 7B, the user only needs to rotate the tool 60 slightly, causing the protruding column 61 to rotate and hit the guide surface 25 that contacts the end face of the oscillating end 20B, causing the oscillating member 20 to oscillate and the oscillating end 20B to move away from the guide groove 14. As a result, the protruding column 61 can smoothly exit the guide groove 14, and the tool 60 can be removed. The user does not need to hold the oscillating member 20 with their hand, and can remove the tool quickly.

[0044] Furthermore, the protruding column 61 of the tool 60 is not limited to the cylindrical shape shown in Figures 7A and 7B, but may be in a form like the guide block 731 shown in Figure 1, or in any other form. It may have an inclined surface on the wide portion that contacts the guide surface 25, as in the guide block 731 shown in Figure 1, or it may have a wide portion on a rectangular prism-shaped projection. It is sufficient that it is inserted into and supported in the guide groove 14 and can press against the guide surface 25 during the removal operation.

[0045] Furthermore, please refer to Figures 5A, 5B, and 6. The convex edge end face 241 is inserted into the top groove 15, and the limiting plug 223A penetrates the front wall 11 and is inserted into the arc-shaped groove 221. As a result, the upper edge swing portion 132 can restrict the convex edge portion 24, and the limiting plug 223A can restrict the inner wall 221C of the arc-shaped groove 221. This ensures that the swinging member 20 is stably connected to the main body 10, preventing unwanted movement. Furthermore, even if the pivot component 20C is removed, the swinging member 20 will not fall. [Explanation of Symbols]

[0046] 10...Main body, 10A...First side, 10B...Second side, 11...Front wall, 12...First side wall, 121...First oscillating part, 13...Second side wall, 131...Second oscillating part, 132...Upper edge oscillating part, 132A...Stopping end face, 14... Guide groove, 141... Main groove section, 142... First side groove, 143... Second side groove, 15...Top groove, 16...Back wall, 17... Upper connecting wall, 171... First extension part, 172... First common perforation, 18...lower connecting wall, 181...second extension part, 182...convex mass, 183...second common perforation, 184...assembly space, 19...Drilling hole, 20...Oscillating member, 20A...Moving end of plate, 20B...Oscillating end, 20C...Pivot part 21...Top surface, 22...Bottom surface, 221...Arch-shaped groove, 221A...Groove wall, 221B...Opening, 221C...Inner wall, 222...First limiting section 223...Second limiting section, 223A...Limiting plug, 23...Inner contraction portion, 231...Inner contraction end face, 232...Inner end, 233...Outer end, 234...Retaining projection, 24...Convex edge portion, 241...Convex edge end face, 242...Swinging end, 243...Outer end, 25...Guiding surface, 251...Input end, 252...Output end, 30...Elastic body (returning mechanism), 40...Positioning holes, 41...Positioning screws, 60...Tool, 61...Convex column, 611...Protrusion, 612...Wide part L...belt, Y...horizontal direction, 71...First piece, 711...Guide groove, 72...Second piece, 73...Lifting device, 731...Guide block 74... Insertion member, 75... Stopper.

Claims

1. The main body has a front wall, a first side wall and a second side wall. A guide groove is formed between the front wall, the first side wall and the second side wall. The oscillating member has a plate-moving end and an oscillating end, a pivot component is provided between the plate-moving end and the oscillating end, the oscillating member is pivotally mounted to the front wall by the pivot component, the end face of the oscillating end is arc-shaped and a portion thereof is inserted into a guide groove, When the plate moving end is pulled, the oscillating end moves away from the guide groove, and furthermore, the oscillating member is provided with a guide surface that contacts the end face of the oscillating end. A tool engagement structure characterized by comprising a return means for driving the oscillating member to its return position.

2. A tool engagement structure according to claim 1, The tool engagement structure is characterized in that the main body has opposing first and second sides, the extension direction between the first and second sides is transverse, the first side wall is located on one side in the transverse direction along the guide groove, and the second side wall is located on the other side in the transverse direction along the guide groove.

3. A tool engagement structure according to claim 1, The second side wall is provided with an upper edge pivoting portion, and a top groove is formed between the upper edge pivoting portion and the front wall. A stopper end surface is provided at one end of the upper edge swinging portion, and an inwardly contracted portion and a convex edge portion are provided adjacent to each other at the swinging end. The aforementioned convex edge portion protrudes from the inwardly contracted portion, and the inwardly contracted portion is provided with an inwardly contracted end face, and the convex edge portion is provided with a convex edge end face. The aforementioned inwardly contracted end face and convex edge end face are arc-shaped, the inwardly contracted end face faces the upper edge pivot portion, and the convex edge end face is inserted into the apex groove. The two opposing ends of the aforementioned inwardly contracted portion are an inner end and an outer end, respectively, with the inner end being closer to the guide groove than the outer end. A tool engagement structure characterized in that a retaining projection is provided at the outer end of the inwardly retracted portion, and this retaining projection protrudes from the inwardly retracted end surface and abuts against the stopper end surface.

4. A tool engagement structure according to claim 1, The rocking member has opposing front and back surfaces, the back surface faces the front wall of the main body, and the back surface is provided with an arc-shaped groove, the arc-shaped groove is close to the rocking end and away from the plate moving end, A first restricting portion is provided at one end of the arc-shaped groove, and a second restricting portion is provided at the other end. The first restricting portion is movable according to the position of the swinging member, and the second restricting portion is fixed. The tool engagement structure is characterized in that the return means is an elastic body provided within the arc-shaped groove, with one end of the elastic body in contact with the first limiting portion and the other end in contact with the second limiting portion.

5. A tool engagement structure according to claim 4, The aforementioned arc-shaped groove is an open groove, with a groove wall at one end and an opening at the other end. A tool engagement structure characterized by having a limiting plug provided, the limiting plug penetrating the front wall and inserted into the arc-shaped groove, being close to the opening and away from the groove wall, the first limiting portion being the groove wall, and the second limiting portion being the limiting plug.

6. The tool engagement structure according to claim 2, The tool engagement structure is characterized in that the guide surface has an in-end and an out-end, the out-end is closer to the first side than the in-end in a lateral position, the out-end is closer to the guide groove than the in-end, and the out-end is in contact with the oscillating end.

7. A tool engagement structure according to claim 1, The tool engagement structure is characterized in that the pivot component is a screw, and the screw passes through the oscillating member and is fastened to the front wall.

8. A tool engagement structure according to claim 1, The tool engagement structure is characterized in that the main body further has a rear wall, an upper connecting wall, and a lower connecting wall, there is a gap between the front wall and the rear wall, one end of the upper connecting wall and the lower connecting wall is connected to the front wall and the other end is connected to the rear wall, and perforations are formed between the front wall, rear wall, upper connecting wall, and lower connecting wall.

9. The tool engagement structure according to claim 8, A tool engagement structure characterized in that the upper connecting wall is provided with a first extension for connecting with other tool engagement structures.

10. The tool engagement structure according to claim 8, A tool engagement structure characterized in that the lower connecting wall is provided with a second extension for connecting with other tool engagement structures.

11. The tool engagement structure according to claim 9, The first extension portion is provided with a first common perforation, and the lower connecting wall is provided with a second extension portion. The second extension portion has two protrusions, each of which is provided with a second common perforation, and an assembly space is formed between the two protrusions. The tool engagement structure is characterized in that the first extension portion is inserted into the assembly space, the first common perforation and the second common perforation are connected, and thereby the extension column is drilled.

12. The tool engagement structure according to claim 8, The tool engagement structure is further characterized by being provided with a positioning hole and a positioning screw, wherein the positioning hole is drilled through the second side wall and the front wall, and the positioning screw is provided in the positioning hole.

13. A tool engagement structure according to claim 1, wherein the guide groove is provided with a main groove, a first side groove and a second side groove in communication, and a first oscillating part is provided on the first side wall and a second oscillating part is provided on the second side wall. A tool engagement structure characterized in that a first side groove is formed between the first oscillating part and the front wall, and a second side groove is formed between the second oscillating part and the front wall.

14. A tool engagement structure according to claim 1, characterized in that the guide surface is inclined toward the guide groove.

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