TWI607835B - Integral type wrench structure for preventing - Google Patents

Description

Integrated wrench structure that prevents the workpiece from being detached

The invention relates to a wrench structure, in particular to a wrench structure which is convenient to assemble and has a manufacturing economical effect to prevent the workpiece from being detached.

Press, a tool commonly used in wrench work, used to tighten, turn loose screws or nuts and other types of positioning workpieces, and a wide variety of wrenches, including open end wrenches, compound wrenches, plum wrenches, adjustable wrenches and socket wrenches. The conventional wrench structure generally includes a head portion and a handle portion, and the head portion has an accommodating space for accommodating a workpiece (screw or nut), and the accommodating space is in contact with the workpiece. After the fit, the handle is rotated and applied to achieve the purpose of tightening and loosening the workpiece. Although the conventional wrench structure technology can be rotated by the wrench to achieve the labor-saving effect of tightening and loosening the workpiece, there are still some defects, for example, when the accommodating space of the wrench is in contact with the workpiece, Due to problems such as the construction environment space or the angle of the force application, the head of the wrench is often easily separated from the workpiece that has been positioned and engaged. At this time, the head space is required to be placed and positioned to fit the workpiece. , making the operation quite unsatisfactory and wasting time, and in the case that the head (accommodation space) and the application workpiece are relatively dislocated and the force is relatively strong, there is even a risk of hand injury causing a hand injury. situation.

A technique for preventing misalignment between a wrench and a workpiece is disclosed in the new patent application No. 483367, which provides a wrench structure improvement, which mainly comprises: a wrench, a rotating member, an upper cover and a ring; The working end has a receiving hole, the receiving hole is accommodated by a rotating member, a card slot is arranged on one side of the receiving hole and the upper cover, a snap tooth is arranged around the outer part of the rotating member, and a polygonal groove is arranged at the center position. An upper cover can be covered over the receiving hole of the wrench, and a ring groove is arranged with respect to the card slot of the wrench, and a card smaller than the multi-angle groove of the rotating member is arranged at the upper end. A ring can be inserted between the slot of the wrench and the ring groove of the upper cover, and the upper cover is fixed or pivoted on the wrench by the ring. The prior art (new type 483367) can prevent the screwing member from falling off the wrench by the card cover surface of the upper cover, but the upper cover is provided by its own ring groove setting and the wrench slot of the wrench, and is matched with a ring sleeve. Fixing in between and making it cumbersome and inconvenient to manufacture and assemble, does not meet the economic benefits of manufacturing, and is not ideal design.

The related art is also known as the new type 494830 patent, which provides a ratchet wrench anti-extraction structure improvement, which mainly comprises: a ratchet wrench end having a receiving hole, a space for accommodating the hole for the ratchet and Two upper and lower ring rings are accommodated, and a ring groove is arranged at a near end of the receiving hole for pivoting the upper ring; a ratchet tooth is provided around the outer circumference of the ratchet wheel and a multi-angle groove is arranged at a center position; and the upper and lower ring rings are provided with a fitting end, and They are respectively fixed on the upper and lower end faces of the ratchet wheel, and the fitting ends are protruded into the polygonal groove of the ratchet wheel and the fitting ends of the upper and lower ring rings are shifted from each other. The conventional technology (new type 494830) can perform the locking of the screwing member by the upper (lower) ring when the ratchet wrench is rotated in the positive (reverse) rotation to prevent the falling off of the wrench, but the ratchet The arrangement of the ring groove at the end of the accommodating hole of the wrench and the use of the two upper and lower ring rings also have the cumbersome components and inconvenience in manufacturing and assembly, which is not in line with the economical efficiency of manufacture, and the embedded end of the ring is rotated on the wrench. When the force is operated, it is easily deformed or squeezed, which forms a serious defect of the overall shape of the wrench. It is also necessary to improve it. Therefore, how to solve the lack of manufacturing and assembly of the conventional anti-disengage wrench should be The intellectuals should solve and overcome important issues.

Therefore, the inventors of the present invention have developed the solution in view of the disadvantages of the conventional assembly and assembly of the anti-disengagement wrench and the fact that the structural design is not ideal, and hope to develop a more operational stability. One of the safety, economical and economical effects of the structure of the wrench to prevent the workpiece from being detached, to serve the public and to promote the development of the industry, and to create the invention by a long time.

The object of the present invention is to prevent the detachment of the workpiece from the operation of the workpiece by the simple configuration, thereby achieving excellent process convenience and economic efficiency in manufacturing and assembly. Beneficiary.

Still another object of the present invention is to provide a structure which is capable of preventing the wrench from being detached from the workpiece and having structural stability and operational reliability, thereby actively enhancing its practical robustness and competitiveness of the product.

The technical means for achieving the above object includes: a wrench head having a hollow operation receiving space, the peripheral wall of the operation receiving space having an operation surface, the operation surface may include a curved surface, A curved surface or a straight surface is combined, the rear end of the wrench head is connected to a wrench handle portion, and a top end portion is disposed above the head portion of the wrench, and the top end portion protrudes toward the center of the operation receiving space to have a top end convex portion. Forming, in the direction of the center of the operation receiving space, an inner convex abutting ring space above the operating receiving space, the top protruding portion serving as a covering limit above the operating receiving space, and the top protruding portion is defined by The wrench head is integrally extended to be formed.

It is still another object of the present invention to provide a set of fasteners that are used in conjunction with the size of the workpiece to be used when working on workpieces (screws or nuts) of different sizes, without the need to replace the entire set of wrenches. This will increase economic efficiency.

Another technical means for achieving the above object includes: a wrench head having a hollow operation receiving space; and a detachable sleeve in the operation receiving space, the sleeve is a hollow ring body, and the sleeve is provided with a sleeve accommodating space, and an inner side of the sleeve is provided with an operation surface, and the operation surface can be composed of a curved surface, a curved surface or a straight surface, and the sleeve is assembled. Positioning in the operating accommodating space of the head of the wrench; and having a top end portion above the head of the wrench, the top end portion has a top end protruding toward the center of the operating accommodating space and the sleeve accommodating space a convex portion, the top convex portion forming an inner convex abutting ring space above the sleeve accommodating space toward the center of the sleeve accommodating space, so that the top protruding portion serves as a covering limit above the sleeve accommodating space, And the top protrusion is integrally formed by the wrench head; at the same time, the top end of the sleeve is also covered by the top protrusion of the wrench head.

In the above configuration, the outer side of the sleeve is provided with a ring gear portion.

The foregoing structure further includes a positioning piece, the positioning piece is embedded in one of the annular groove below the operating receiving space, and the two end ends of the positioning piece are respectively provided with a through hole.

A further technical means for achieving the above object includes: a wrench head having a hollow operation receiving space, a rear end portion of the wrench head is provided with a first pivot slot, and the first pivot slot is borrowed a lateral control space for connecting the operation receiving space, the rear end of the wrench head is connected to a wrench handle portion; a latching member is disposed in the control space; and a reversing switch is disposed in the first pivot slot The reversing switch is provided with an abutting spring, the abutting spring abuts against the latching member; a ratchet member is disposed in the operating receiving space, and the ratcheting member has a ratcheting receiving space. The outer side of the ratchet member is coupled to the latch member.

In the above configuration, the top end of the wrench has a top end portion, and the top end portion is circumferentially protruded toward the center of the operating accommodating space and the slanting member accommodating space, and has a top end convex portion toward the ratchet member. Forming, in a central direction of the accommodating space, an inner ring abutting ring space above the accommodating member accommodating space, the top protruding portion serving as a covering limit above the accommodating member accommodating space, and the top protruding portion is formed by the wrench head The department is integrally extended.

In the above configuration, the first pivoting groove includes a second pivoting groove having a smaller diameter than the first pivoting groove, and the first pivoting groove is provided with an abutting groove on the end wall.

In the above configuration, the latching member is provided with one of a tooth portion on the front end surface and a latching groove on the rear end surface, and the tooth portion is formed in an inner arc shape.

In the above configuration, the reversing switch is provided with an upper triggering member and a lower positioning post, and the positioning post is disposed on the second pivoting slot.

In the above configuration, the front end surface of the reversing switch is provided with a spring slot for penetrating the abutting spring.

In the foregoing configuration, the front and rear ends of the abutting spring are arranged in a denser spring, and the middle portion is arranged in a relatively sparse spring.

In the above configuration, the ratchet member has an outer ring portion and an inner side operating surface.

In the above configuration, the diameter of the ring-shaped space is smaller than the diameter of the ratchet housing space.

The foregoing structure further includes a support ring member, the support ring member is disposed on the The operation is disposed in the accommodating space and is sleeved under the ring gear portion of the swaying member.

The foregoing structure further includes a positioning piece, the positioning piece is embedded in one of the ring-shaped grooves below the operating receiving space for supporting the supporting ring member, and the two end ends of the positioning piece are respectively provided with a through hole.

For a better understanding and understanding of the technical features of the present invention and the achievable effects of the present invention, please refer to the preferred embodiment of the drawings and the detailed descriptions as follows:

10‧‧‧Wrench

11‧‧‧ wrench head

110‧‧‧Operating space

111‧‧‧First pivot slot

112‧‧‧Second pivot slot

113‧‧‧Inch groove

114‧‧‧

115‧‧‧Card Firmware

12‧‧‧Wrench handle

13‧‧‧Control space

14‧‧‧ Cards

141‧‧‧cartridge groove

142‧‧‧ teeth

15‧‧‧Reversing switch

151‧‧‧Removable parts

152‧‧‧Positioning column

153‧‧‧Spring slot

16‧‧‧Abutting spring

17‧‧‧Top part

171‧‧‧Top convex

172‧‧‧Round space

18‧‧‧Operation surface

20‧‧‧Sets of firmware

21‧‧‧Sets of firmware accommodation space

211‧‧‧Operation surface

22‧‧‧ tooth ring department

30‧‧‧Support ring

40‧‧‧ Positioning film

41‧‧‧Perforation

50‧‧‧thorn parts

51‧‧‧Spinning housing space

511‧‧‧Operation surface

52‧‧‧ tooth ring department

100‧‧‧Workpiece

101‧‧‧Workpiece head

Fig. 1 is a perspective view showing a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view showing the operation of the first embodiment of the present invention.

Figure 3 is an exploded perspective view of a second embodiment of the present invention.

Figure 4 is a schematic cross-sectional view showing the operation of the second embodiment of the present invention.

Figure 5 is a perspective view of a third embodiment of the present invention.

Figure 6 is an exploded perspective view of a third embodiment of the present invention.

Figure 7 is a schematic cross-sectional view showing the operation of the third embodiment of the present invention.

Referring to Figures 1 and 2, a first embodiment of the integrated structure for preventing the workpiece from being detached from the workpiece includes a wrench 10, the wrench 10 further comprising: a wrench head 11 and a wrench handle 12, The wrench head 11 has a hollow operation receiving space 110, and the peripheral wall of the operation receiving space 110 has an operation surface 18; the wrench head 11 has a top end portion 17 above the wrench head portion 11, and the top end portion 17 accommodates the operation A top end convex portion 171 is protruded from the center of the space 110, and the top end convex portion 171 is formed in the center of the operation receiving space 110 and forms an inner convex ring space 172 above the operation receiving space 110. The top convex portion 171 is used as a cover limit above the operation accommodation space 110. The top end portion 17 is a portion of the region in which the top end of the wrench head portion 11 is integrally formed, that is, the wrench head portion 11 integrally extends the tip end convex portion 171.

When the operation receiving space 110 of the wrench head 11 is provided with the workpiece 100 (such as a screw) When the rod/nut or the like is rotated, the top end convex portion 171 of the wrench head 11 can cover the workpiece head 101 of the workpiece 100 to prevent the workpiece head 101 from coming off the ring space from above. 172. It is worth mentioning that the composition of the present invention for preventing the disengagement of the workpiece does not require complicated components, and is relatively simple in design, difficult to be broken, or deformed and damaged, and can surely exert its anti-off effect.

In the above configuration, the operation surface 18 may be composed of a combination of a curved surface, a curved surface, or a straight surface, but is not limited thereto.

In the foregoing configuration, the diameter of the ring-shaped space 172 is smaller than the diameter of the operation receiving space 110, and the effect of limiting and preventing the protrusion by the top protrusion 171 is achieved.

Referring to Figures 3 to 4, the second embodiment of the integrated structure for preventing the workpiece from being detached from the workpiece is modified based on the first embodiment, so that the wrench can be applied to a plurality of sizes of workpieces. The wrench 10 includes a wrench head 11 having a hollow accommodating space 110. The bottom of the accommodating space 110 is provided with a ring groove 113. A detachable sleeve 20 is disposed in the accommodating space 110. The sleeve 20 is a hollow ring body having a sleeve accommodating space 21, and the sleeve 20 is inside. The top end portion 17 has a top end portion 17 extending upwardly from the center of the operation receiving space 110 and the sleeve receiving space 21, and has a top end convex portion 171. The top protrusion 171 forms an inner ring abutment space 172 above the sleeve accommodating space 21 in the center direction of the sleeve accommodating space 21, so that the top protrusion 171 is covered as the sleeve accommodating space 21 Limit, and the top protrusion 171 is The wrench head 11 is integrally formed to extend; at the same time, the top end of the sleeve 20 is also covered by the top end projection 171 of the wrench head 11.

In the foregoing configuration, the diameter of the ring-shaped space 172 is smaller than the diameter of the sleeve accommodating space 21, and the effect of limiting and preventing the protrusion by the tip protrusion 171 is achieved.

In the above configuration, the sleeve 20 is further provided with the outer ring portion 22.

In the foregoing configuration, the sleeve 20 is a ratchet member, but is not limited thereto.

In the above configuration, the operation surface 211 may be composed of a combination of a curved surface, a curved surface, or a straight surface.

The foregoing configuration further includes a positioning piece 40, which can be a C-shaped ring member, and the positioning piece 40 is embedded in the annular groove 113 below the operating accommodating space 110 for use as an internal component of the operating accommodating space 110. The positioning end of the positioning is provided; the two ring ends of the positioning piece 40 are respectively provided with a through hole 41 for facilitating the positioning and displacement operation thereof.

The foregoing configuration further includes a fastener 115 disposed on an inner side of the operation receiving space 110, and the fastener 115 is correspondingly fixed to the sleeve 20 .

Referring to Figures 5 to 7, the third embodiment of the integrated structure for preventing the workpiece from being detached from the workpiece is modified based on the structural features of the top portion 17 according to the first embodiment, so that it is suitable for the ratchet wrench. application. The spanner 10 includes a wrench head 11 and a wrench handle 12, and the wrench head 11 has a hollow operation receiving space 110, and the bottom of the operation receiving space 110 is provided with a ring. A first pivot slot 111 is defined in the slot head portion 11 adjacent to the wrench handle portion 12 (ie, the rear end portion of the wrench head portion 11). The first pivot slot 111 includes a first width and a smaller width than the first pivot slot 111. The slot 111 has a second pivot slot 112 (see FIG. 7) having a small diameter. The first pivot slot 111 is connected to the operation receiving space 110 by a lateral control space 13 , and the first pivot slot 111 is followed by the first pivot slot 111. The end wall is provided with abutment groove 114; in other embodiments, the first pivot groove 111 can be located on the wrench handle 12, depending on the shape of the wrench head 11; a latching member 14, In the control space 13, the latching member 14 is slightly bent in a half-moon shape, and the latching member 14 is provided with a tooth portion 142 and a rear end surface of the front end surface (in the direction of the operation receiving space 110). a latching groove 141, the tooth portion 142 is formed in an inner arc shape, and the latching groove 141 is disposed opposite to the first pivot slot 111; The switch 15 is disposed in the first pivot slot 111. The switch 15 is provided with an upper triggering member 151 and a lower positioning post 152. The triggering member 151 is opposite to the reversing switch 15 The columnar body has a convex handle shape for facilitating the rotation of the changeover switch 15. The front end surface of the changeover switch 15 is provided with a through spring slot 153. The positioning post 152 is disposed in the first pivot slot 111. The second pivot slot 112 having a smaller diameter is disposed to ensure the stability of the rotation operation of the reversing switch 15; an abutting spring 16 is disposed on the spring slot 153 of the reversing switch 15, and the The top spring 16 abuts between the latching groove 141 of the latching member 14 at the front and the abutting groove 114 of the first pivoting slot 111; in a suitable embodiment, the front and rear ends of the abutting spring 16 are relatively Intensive spring laying, In order to increase the resistance of the spring, and the middle portion of the detachable spring is provided to provide the telescopic elastic force, and the end portion of the abutting spring 16 is formed in an arc shape for the convenience thereof. Displacement resistance; a ratchet member 50 is disposed in the operation receiving space 110 of the wrench head portion 11, and the ratchet member 50 is a hollow toothed ring body having a ratchet receiving space 51, and The outer ring portion 52 and the inner side of the operation surface 511 may be formed by a combination of a curved surface, a curved surface or a straight surface, but are not limited thereto; and the toothed ring portion 52 is coupled to the locking member. 14 tooth portion 142.

Similarly, the top end portion 17 has a top end portion 17 that protrudes toward the center of the operation receiving space 110 and the rocking member receiving space 51 in a circumferential direction, and has a top end convex portion 171. The convex portion 171 is disposed in the center direction of the swaying member accommodating space 51 and forms an inner convex abutting space 172 above the spurring member accommodating space 51. The apex convex portion 171 serves as the upper portion of the spurring member accommodating space 51. Cover the limit. The top end portion 17 is a portion of the region in which the top end of the wrench head portion 11 is integrally formed, that is, the wrench head portion 11 integrally extends the tip end convex portion 171. That is, the diameter of the ring-shaped space 172 is smaller than the diameter of the rocking member accommodating space 51, and the effect of limiting and preventing the protrusion by the top protrusion 171 is achieved; a support ring member 30, the support ring member The locating piece 40 is disposed in the operating accommodating space 110 and is disposed under the ring gear portion 52 of the swaying member 50 for supporting the swaying member 50. The locating piece 40 can be a C-shaped ring member. The positioning piece 40 is embedded in the annular groove 113 below the operating accommodating space 110 for supporting the supporting ring member 30 and the positioning end arranged as the inner member of the operating accommodating space 110; The ends are respectively provided with a through hole 41 for facilitating the positioning and displacement operation thereof.

In this embodiment, when the wrench structure for preventing the workpiece is detached, the rotation of the operation switch can be switched by the rotation of the changeover switch 15, and the abutment spring 16 in the changeover switch 15 is also followed. The rotation displacement causes the front end of the abutment spring 16 to be displaced at the opposite ends of the latching groove 141 of the latching member 14 for the front end to resist, and the rear end of the abutting spring 16 is displaced to actuate the slot 114 for the rearward movement. The end resists, so that the state of the elastic yaw space can be determined by the change of the position of the latch member 14 to control and select the rotational operation direction of the ratchet member 50.

The end portion convex portion 171 is integrally formed with the wrench head portion 11 as a whole of the wrench body 11 , and the top end convex portion 171 serves as the operation receiving space 110. The cover member accommodation space 51) above the cover limit, when the operation When the accommodating space 110 (the shank accommodating space 21 and the ratchet accommodating space 51) is provided with a workpiece 100 (such as a screw/nut or the like) for performing a turning operation, the tip end of the wrench head 11 is convex. The portion 171 can cover the workpiece head 101 that is applied to the workpiece 100 to prevent the workpiece head 101 from being detached from the ring space 172 from above. In this way, the configuration for preventing the workpiece from being detached does not require a complicated component, and the design is relatively simple, difficult to be broken, deformed and damaged, and the anti-off effect can be surely exerted.

According to the present invention, the integrated structure for preventing the workpiece from being detached from the workpiece can be separated from the workpiece by the simple configuration, thereby achieving an excellent manufacturing and assembly process. Convenience and economic efficiency. At the same time, the present invention enables the wrench to prevent the structural design from being detached from the workpiece, and has structural stability and operational reliability, thereby actively improving the practical robustness and the competitive effect of the product.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, the shapes, structures, features, and spirits described in the scope of the present invention are equally varied and modified. All should be included in the scope of the patent application of the present invention.

10‧‧‧Wrench

11‧‧‧ wrench head

110‧‧‧Operating space

12‧‧‧Wrench handle

17‧‧‧Top part

171‧‧‧Top convex

172‧‧‧Round space

18‧‧‧Operation surface

Claims (16)

An integrated wrench structure for preventing the workpiece from being detached, comprising a wrench head having a hollow operation receiving space, the peripheral wall of the operation receiving space having an operation surface, the rear end of the wrench head A top end portion is disposed above the head of the wrench, and the top end portion is circumferentially protruded toward the center of the operation receiving space to have a top end convex portion, and the top end convex portion is formed toward the center of the operation receiving space. The upper end of the accommodating space is formed by the one end of the accommodating space, so that the top end convex portion is a cover limit above the operation accommodating space, and the top end convex portion is integrally formed by the wrench head, and the top end convex portion is formed. It is used to cover a workpiece head which is applied as a workpiece during construction, and prevent the workpiece head from coming out of the ring space. The operating surface of the utility model as claimed in claim 1, wherein the operating surface may comprise a combination of a curved surface, a curved surface or a straight surface. The span type of the ring-shaped space is less than the diameter of the operation receiving space, as one of the structures of the first aspect of the invention claims to prevent the workpiece from being detached. An integrated wrench structure for preventing the workpiece from being detached, comprising: a wrench head having a hollow operation receiving space, the rear end of the wrench head is connected with a wrench handle portion, and the wrench head has a top portion a top end portion; a set of firmware detachably disposed in the operating accommodating space, the sleeve is a hollow ring body having a sleeve accommodating space, and an inner side of the sleeve is provided with an operation surface; In the above configuration, the top end of the wrench has a top end portion, and the top end portion is circumferentially protruded toward the center of the sleeve accommodating space to have a top end convex portion, and the top end convex portion forms the center of the sleeve accommodating space. One end of the sleeve accommodating space abuts the ring space, so that the top protrusion is used as a cover limit above the sleeve accommodating space, and the top protrusion is integrally formed by the wrench head, and the top end is convex. The part is used to cover a workpiece head that is applied as a workpiece during construction, preventing the workpiece head from coming out of the ring space. A wrench structure for preventing the workpiece from being detached as claimed in claim 4, wherein the sleeve has an outer ring portion. A wrench structure for preventing the workpiece from being detached, as in the case of claim 5, wherein The wrench further includes a positioning piece, and the positioning piece is embedded in one of the annular groove below the operating receiving space, and the two end ends of the positioning piece are respectively provided with a through hole. The wrench structure of claim 5, wherein the wrench further comprises a fastener disposed on an inner side of the operating receiving space, the fastener and the set of firmware Corresponding and clamped. For example, in the structure of the fourth aspect of the patent application, the wrench structure for preventing the workpiece from being detached is configured, and the diameter of the ring-shaped space is smaller than the diameter of the sleeve accommodating space. An integrated structure for preventing the disengagement of the workpiece, comprising: a wrench head having a hollow operation receiving space, the first end of the wrench head being provided with a first pivot slot, the first The pivot slot is connected to the operating accommodating space by a lateral control space, and the rear end of the wrench head is connected to a wrench handle; a latching member is disposed in the control space; and a reversing switch is disposed at the first pivot In the slot, the reversing switch is provided with an abutting spring, the abutting spring abuts against the latching member; a ratchet member is disposed in the operating receiving space, the ratchet member is a ratchet a hollow toothed ring body accommodating a space, and the ratchet member has an outer ring portion and an inner side operating surface, the ring gear portion is coupled to the latching member; and the foregoing structure has a top portion of the wrench head a top end portion that protrudes toward the center of the operation receiving space and has a top end convex portion that forms the operation receiving space and the upper portion of the ratcheting member in a direction toward a center of the operation receiving space One of the inner convex portions abuts the ring space, so that the top convex portion serves as the a cover limit above the moving piece accommodating space, and the top protrusion is integrally formed by the wrench head, and the top protrusion is used for inserting a workpiece head which is applied as a workpiece during construction. The workpiece head is prevented from coming out of the ring space. A wrench structure for preventing the workpiece from being detached, wherein the first pivot groove includes a second pivot groove having a smaller diameter than the first pivot groove. An abutment groove is formed on the end wall of the first pivot groove. A wrench structure for preventing the workpiece from being detached as described in claim 9 of the patent application scope, The latching member is provided with one of a tooth portion on the front end surface and a latching groove on the rear end surface, and the tooth portion is formed in an inner arc shape. The spanner switch is provided with a wrench structure for preventing the workpiece from being detached, wherein the reversing switch is provided with an upper trigger member and a lower positioning post, and the positioning post is disposed in the second pivot slot. The wrench structure according to claim 9 is characterized in that the front end surface of the reversing switch is provided with a spring slot for providing the abutting spring. The wrench structure according to claim 9 is characterized in that the diameter of the ring-shaped space is smaller than the diameter of the rocker receiving space. A wrench structure for preventing the workpiece from being detached, as described in claim 9, further comprising a support ring member disposed in the operation receiving space and sleeved on the rocking member Below the ring gear. The wrecking structure for preventing the workpiece from being detached from the workpiece according to the fifteenth aspect of the invention, further comprising a positioning piece embedded in the one of the operating recesses of the operating accommodating space for abutting The support ring member is supported, and the two end ends of the positioning piece are respectively provided with a through hole.