CN212096113U

CN212096113U - Sleeve barrel

Info

Publication number: CN212096113U
Application number: CN201922257419.6U
Authority: CN
Inventors: 江文宏
Original assignee: Salary Enterprise Co ltd
Current assignee: Salary Enterprise Co ltd; Hsin Ying Enterprise Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-12-08
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a sleeve, it includes: a main rod, an outer sleeve and an ejection mechanism. The outer sleeve is movably sleeved on the main rod piece, the ejection mechanism is arranged inside the main rod piece, and the ejection mechanism comprises an elastic piece and a pushing piece, and the elastic piece drives the pushing piece to push against a first object.

Description

Sleeve barrel

Technical Field

The utility model relates to a sleeve.

Background

Sleeves are often used to drive fasteners such as screws, bolts, nuts, etc., and can be one of the most commonly used tools, which is in great demand from manufacturing industries such as factories. However, the size and shape of the sleeve joint part are mostly fixed, and only fasteners matched with the outline of the sleeve joint part can be sleeved, so that a user needs to prepare sleeves with different sizes for use, and the problems of high cost, difficulty in storage, inconvenience in carrying and the like are often caused.

Moreover, the conventional sleeve is too simple and cumbersome to use, such as but not limited to: driving the fastener to rotate is unstable, the fastener is not easily sleeved, the fastener is not easily removed, the sleeve is easily detached from the power tool, and the like, which are problems often encountered in practical operation.

Therefore, there is a need for a new and improved sleeve to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide a sleeve, which can provide two different sizes of socket joint parts for users to choose, and is equipped with an ejection mechanism, and the ejection mechanism supports the object (fastener) to move towards the direction of keeping away from the joint part, so that the user can easily take the object off the sleeve.

To achieve the above object, the present invention provides a sleeve, including: a main rod, an outer sleeve and an ejection mechanism. The main rod piece comprises an axis, a combination part, a body and a first sleeving part, wherein the combination part is connected with a power tool along the axis; the outer sleeve part comprises a second sleeving part which can slide along the axis direction to be sleeved on the main rod part at a use position and a containing position, and the second sleeving part protrudes out of the first sleeving part to be sleeved with a second object when at the use position; the ejection mechanism comprises a pushing element and an elastic element, the pushing element can be movably inserted into the inner space along the axis direction, the elastic element is positioned in the inner space and is elastically abutted between the main rod element and the pushing element, and the elastic element is used for driving an abutting part of the pushing element to normally push the first object to move towards the direction far away from the combining part in the sleeving space.

Preferably, the pushing element further includes a through hole, the through hole is opened on an abutting surface of the abutting portion along the axis, the through hole is communicated with the sleeving space, and the abutting surface abuts against the first object.

Preferably, the abutting portion further includes an outer annular wall and an inner annular wall, the abutting surface is transversely connected between the outer annular wall and the inner annular wall, the outer annular wall has a contour shape matching the contour shape of the inner wall of the first engaging portion, and the inner annular wall surrounds the through hole.

Preferably, the contour of the outer annular wall or the contour of the inner annular wall is selected from the group consisting of a circle, a rectangle, a hexagon, and a dodecagon.

Preferably, the locking mechanism further includes a control member, a through hole set penetrating the combining portion to communicate with the inserting hole, and a locking unit selectively movably received in the through hole set, the control member is movably sleeved on the combining portion, the control member includes a recess, and an opening of the recess faces the combining portion; when the control piece moves to make the concave hole correspond to the through hole group, part of the locking unit can be accommodated in the concave hole without protruding into the inserting hole, and when the control piece moves to make the concave hole and the through hole group dislocated, the inner wall of the control piece presses against the locking unit, and part of the locking unit protrudes into the inserting hole to be connected with the power tool.

Preferably, the magnetic device further includes a magnetic component, the magnetic component is positioned on the abutting surface, and the magnetic component is used for magnetically attracting the first object.

Preferably, the magnetic attraction component is detachably positioned on the abutting surface.

Preferably, the magnetic assembly includes a substrate and at least one magnet, the at least one magnet is positioned on the substrate, one end of the at least one magnet is magnetically attracted to the abutting surface, and the other end of the at least one magnet is magnetically attracted to the first object.

Preferably, in the extending direction of the axis, a gap is defined between the substrate and the abutting surface, and the gap is used for a foreign object to extend into so as to hook the substrate to be separated from the abutting surface.

Preferably, the locking mechanism further includes a control member, a through hole set penetrating the combining portion to communicate with the inserting hole, and a locking unit selectively movably received in the through hole set, the control member is movably sleeved on the combining portion, the control member includes a recess, and an opening of the recess faces the combining portion; when the control piece moves to make the concave hole correspond to the through hole group, part of the locking unit can be accommodated in the concave hole without protruding into the inserting hole, and when the control piece moves to make the concave hole and the through hole group dislocated, the inner wall of the control piece presses against the locking unit, and part of the locking unit protrudes into the inserting hole to be connected with the power tool; the sleeve further comprises a magnetic attraction component, the magnetic attraction component is positioned on the abutting surface, and the magnetic attraction component is used for magnetically attracting the first object; the magnetic component is detachably positioned on the abutting surface; the magnetic component comprises a substrate and at least one magnet, the at least one magnet is positioned on the substrate, one end of the at least one magnet is magnetically attracted to the abutting surface, and the other end of the at least one magnet is magnetically attracted to the first object; in the extending direction of the axis, a gap is defined between the substrate and the abutting surface, and the gap is used for a foreign object to extend into so as to hook the substrate to be separated from the abutting surface; the substrate is provided with a group of connecting holes in a penetrating way, the group of connecting holes are correspondingly communicated with the through hole, and the shape of the group of connecting holes is equal to that of the through hole; the number of the at least one magnet is plural, and the plural magnets are symmetrically arranged by the assembling holes; the substrate comprises a first surface and a second surface which are opposite, the first surface is back to the abutting surface, the second surface faces to the abutting surface, the magnets are flush with the first surface, the magnets protrude out of the second surface and abut against the abutting surface to form the gap, and the gap is communicated with the assembling hole; the pushing piece further comprises a head part and a body part, two ends of the body part are respectively connected with the head part and the abutting part, the abutting part is higher than the head part in the direction vertical to the axis, and the head part is higher than the body part; the main rod part further comprises a plurality of positioning holes, the plurality of stopping parts are accommodated in the plurality of positioning holes and protrude out of the inner space, and the plurality of stopping parts stop the head part in the axis direction; a ring sleeve tightly hooping the main rod piece to shield the plurality of positioning holes, wherein the ring sleeve presses against the plurality of stopping pieces to protrude out of the inner space in the direction vertical to the axial direction; when the outer sleeve piece is positioned at the using position, the outer sleeve piece can press against the ring sleeve, and when the outer sleeve piece is positioned at the accommodating position, the end face of the outer sleeve piece does not protrude out of the end face of the first sleeving part in the axial direction; the control member is movably sleeved on the combining portion along the axis and can rotate around the axis; in the axial direction, the abutting part does not protrude out of the end surface of the first sleeving part; the locking mechanism further comprises a spring which elastically supports between the combining part and the control part so as to ensure that the concave hole is normally staggered with the through hole group; the through hole is formed along the axis and entirely penetrates the pushing member, so that the pushing member is in a hollow cylindrical shape.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required to be used in the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a sectional view of the first embodiment of the present invention using the second hitching section.

Fig. 4 to 5 are sectional views of the first embodiment of the present invention using the first hitching section.

Fig. 6 is an exploded view of the magnetic attraction component according to the first embodiment of the present invention.

Fig. 7 is a cross-sectional view of a magnetic attraction assembly according to a first embodiment of the present invention.

Fig. 8 is a cross-sectional view of a magnetic assembly according to a first embodiment of the present invention.

Fig. 9 shows a second embodiment of the present invention.

Fig. 10 shows a third embodiment of the present invention.

Fig. 11 shows a seat back according to a fourth embodiment of the present invention.

Fig. 12 shows a backrest according to a fifth embodiment of the present invention.

Fig. 13 shows a backrest according to a sixth embodiment of the present invention.

Fig. 14 shows a seat back according to a seventh embodiment of the present invention.

Fig. 15 shows a backrest according to an eighth embodiment of the present invention.

Fig. 16 is a perspective view of a ninth embodiment of the present invention.

Fig. 17 is an exploded view of fig. 16.

Fig. 18 is a perspective view of a tenth embodiment of the present invention.

Wherein, 1, 1A: a main bar member; 11: an axis; 12: a bonding section; 121: inserting holes; 13: a body; 131: an interior space; 14,14A, 14B: a first nesting portion; 141: a sleeving space; 15: positioning holes; 2: an outer sleeve member; 21: a second socketing portion; 3, 3A: an ejection mechanism; 31: pushing the workpiece; 32,32A,32B,32C, 32D: a butting part; 32E,32F, 32G: a butting part; 321: an abutting surface; 322,322A,322B,322C, 322D: an outer annular wall; 323,323A,323B, 323C: an inner annular wall; 323D, 323E: an inner annular wall; 33: a head portion; 34: a body part; 35: a through hole; 36: an elastic member; 4: a magnetic component; 41: a magnet; 42: a substrate; 421: a first side; 422: a second face; 423: assembling holes; 43: a gap; 5: a locking mechanism; 51, 51A: a control member; 511: concave holes; 512: a ring groove; 52: a group of through holes; 53: a locking unit; 54: a spring; 61: a stopper; 62: sleeving a ring; 7: a power tool; 81: a first object; 82: a second object.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The following description is given by way of example only, and not by way of limitation, of the scope of the invention.

Referring to fig. 1 to 8, which show a first embodiment of the present invention, the sleeve of the present invention includes a main rod 1, an outer sleeve 2 and an ejection mechanism 3.

The main rod 1 includes an axis 11, a combination portion 12 connected along the axis 11, a body 13 and a first engaging portion 14, the combination portion 12 is for connecting a power tool 7, the body 13 encloses an inner space 131, the first engaging portion 14 encloses a engaging space 141, the engaging space 141 is connected to the inner space 131 and is for engaging a first object 81 (such as a nut or a screw); the outer sheath 2 includes a second engaging portion 21 slidably engaging with the main rod 1 along the axis 11 in a use position and a storage position, wherein the second engaging portion 21 protrudes from the first engaging portion 14 to engage with a second object 82 (such as a nut or a screw). Therefore, a user only needs to take one sleeve, and can select the first sleeving part 14 or the second sleeving part 21 according to requirements, so as to reduce the number of the sleeves, save the placing space and facilitate carrying or placing.

The ejecting mechanism 3 includes a pushing element 31 and an elastic element 36, the pushing element 31 is movably inserted into the inner space 131 along the axis 11 direction, the elastic element 36 is positioned in the inner space 131 and elastically pressed between the main rod element 1 and the pushing element 31, so as to drive an abutting portion 32 of the pushing element 31 to normally push the first object 81 to move in a direction away from the connecting portion 12 in the engaging space 141. When the sleeve is used to rotate the first object 81, the pushing element 31 is driven by the elastic element 36 to normally abut against the first object 81, so as to improve the stability of the connection between the first engaging portion 14 and the first object 81; moreover, when the sleeve is used for loosening, once loosening is completed, the pushing element 31 can provide an acting force to assist the first object 81 to withdraw from the engaging space 141, so as to facilitate the user to take the object, and the situation that the first object 81 is embedded in the engaging space 141 and is not easy to take out, especially when the first object 81 is a nut, is not likely to occur.

Preferably, the pushing element 31 further includes a through hole 35, the through hole 35 is opened on an abutting surface 321 of the abutting portion 32 along the axis 11, the through hole 35 is communicated with the engaging space 141, when the first object 81 is a nut, the through hole 35 can be inserted by a screw rod, so as to allow the first engaging portion 14 to be smoothly engaged with the first object 81; wherein the abutting surface 321 abuts against the first object 81. In this embodiment, the through hole 35 is entirely through the pushing member 31 along the axis 11, so that the pushing member 31 is hollow and cylindrical, and a longer screw rod can be inserted into the through hole.

The abutting portion 32 further includes an outer wall 322 and an inner wall 323, the abutting surface 321 is transversely connected between the outer wall 322 and the inner wall 323, the contour of the outer wall 322 matches the contour of the inner wall of the first engaging portion 14, so that the pushing element 31 can stably slide along the inner wall of the first engaging portion 14 through the outer wall 322, wherein the inner wall 323 surrounds the through hole 35. In this embodiment, the inner wall of the first engaging portion 14 is hexagonal, and the outer wall 322 is hexagonal.

Of course, the contour of the outer annular wall 322 or the contour of the inner annular wall 323 can be selected from various geometric shapes such as circular, rectangular, hexagonal, and dodecagonal shapes, and can be disposed in various ways to form various different abutting portions 32.

For example, but not limited to, the outer annular wall 322 of the abutting portion 32A of the second embodiment shown in fig. 9 is hexagonal, and the inner annular wall 323A is circular; the outer annular wall 322 of the abutting portion 32B of the third embodiment of fig. 10 is hexagonal, and the inner annular wall 323B is dodecagonal; the outer annular wall 322 of the abutting portion 32C according to the fourth embodiment of fig. 11 is hexagonal, and the inner annular wall 323C is square.

Alternatively, as shown in fig. 12, the outer annular wall 322A of the abutting portion 32D of the fifth embodiment is circular, and the inner annular wall 323A is circular; the outer annular wall 322A of the abutting portion 32E of the sixth embodiment of fig. 13 is circular, and the inner annular wall 323B is dodecagonal; the outer annular wall 322A of the abutting portion 32F of the seventh embodiment of FIG. 14 is circular, and the inner annular wall 323C is square; alternatively, the outer annular wall 322B and the inner annular wall 323A of the abutting portion 32G of the eighth embodiment of fig. 15 are square and circular.

Referring to the first embodiment shown in fig. 8 of fig. 1, the sleeve further includes a magnetic component 4, the magnetic component 4 is positioned on the abutting surface 321, the magnetic component 4 can magnetically attract the first object 81, so that when the first object 81 is pushed away from the engaging space 141 by the pushing member 31, the first object 81 is magnetically attracted by the magnetic component 4 and cannot directly fall off, thereby facilitating the user to take.

Preferably, the magnetic component 4 is detachably positioned on the abutting surface 321, so that a user can select whether to use the magnetic component 4 according to requirements, thereby providing more diversified uses.

More specifically, the magnetic component includes a substrate 42 and at least one magnet 41, the at least one magnet 41 is positioned on the substrate 42, one end of the at least one magnet 41 is magnetically attracted to the abutting surface 321, and the other end of the at least one magnet 41 is magnetically attracted to the first object 81, and has two functions of positioning and absorbing; the at least one magnet 41 is magnetically attracted to the abutting surface 321, which is convenient for assembly and disassembly. More specifically, the base plate 42 is provided with a set of connection holes 423 through, the set of connection holes 423 correspondingly communicates with the through hole 35 for passing the screw rod, and the shape of the set of connection holes 423 is identical to the shape of the through hole 35. Furthermore, the number of the at least one magnet 41 is plural, and the plural magnets 41 are symmetrically arranged with the connection hole 423 to provide uniform magnetic attraction.

Preferably, in the extending direction of the axis 11, a gap 43 is defined between the base plate 42 and the abutting surface 321, and the gap 43 is used for a foreign object (such as a finger, a hand tool, etc.) to extend into so as to hook the base plate 42 to be separated from the abutting surface 321. In this embodiment, the substrate 42 includes a first surface 421 and a second surface 422 opposite to each other, the first surface 421 faces away from the abutting surface 321, the second surface 422 faces the abutting surface 321, the plurality of magnets 41 are flush with the first surface 421, the plurality of magnets 41 protrude from the second surface 422 and abut against the abutting surface 321 to form the gap 43, and the gap 43 is communicated with the connection hole 423, so that the substrate 423 has a uniform thickness, and the gap 43 can be formed in a simple structure by only installing the plurality of magnets 41 with a relatively thick thickness, which is quite convenient for production and assembly.

Specifically, the pushing element 31 further includes a head portion 33 and a body portion 34, two ends of the body portion 34 are respectively connected to the head portion 33 and the abutting portion 32, in a direction perpendicular to the axis 11, the abutting portion 32 is higher than the head portion 33, and the head portion 33 is higher than the body portion 34. Moreover, the main rod 1 further includes a plurality of positioning holes 15, a plurality of stoppers 61 are accommodated in the plurality of positioning holes 15 and protrude from the inner space 131, and the plurality of stoppers 61 stop the head 33 in the direction of the axis 11 to prevent the pushing member 31 from separating.

More specifically, a collar 62 is tightened around the main rod 1 to cover the positioning holes 15, and the collar 62 presses against the stoppers 61 protruding from the inner space 131 in the direction perpendicular to the axial direction, ensuring that the stoppers can securely stop the head 33. When the outer sleeve 2 is located at the using position, the outer sleeve 2 is preferably pressed against the ring sleeve 62 to increase the force of the ring sleeve 62 pressing against the plurality of stoppers 61, so that the plurality of stoppers 61 can provide enough lateral force to stabilize the pushing member 31; when the outer sleeve 2 is located at the storage position, the end face of the outer sleeve 2 preferably does not protrude beyond the end face of the first engaging portion 14 in the direction of the axis 11, and when an object from the axis 11 collides, the first engaging portion 14, which is not stationary, can contact the object first to avoid unnecessary collision and slippage of the outer sleeve 2, and similarly, the abutting portion 32 preferably does not protrude beyond the end face of the first engaging portion 14 in the direction of the axis 11.

The sleeve further comprises a locking mechanism 5, the combining portion 12 is surrounded by an inserting hole 121, the locking mechanism 5 comprises a control member 51, a through hole group 52 and a locking unit 53, the through hole group 52 penetrates through the combining portion 12 to be communicated with the inserting hole 121, the locking unit 53 is selectively and movably accommodated in the through hole group 52, the control member 51 is movably sleeved on the combining portion 12, the control member 51 comprises a concave hole 511, and an opening of the concave hole 511 faces the combining portion 12; when the control member 51 moves to make the concave hole 511 correspond to the through hole group 52, a part of the locking unit 53 can be accommodated in the concave hole 511 without protruding into the inserting hole 121, and when the control member 51 moves to make the concave hole 511 and the through hole group 52 dislocate, the inner wall of the control member 51 presses against the locking unit 53, and makes a part of the locking unit 53 protrude into the inserting hole 121 to connect the power tool 7.

Preferably, the control member 51 is movably sleeved on the coupling portion 12 along the axis 11 and can rotate around the axis 11, so that the concave hole 511 and the through hole group 52 are relatively dislocated in a three-dimensional space, and the sleeve can be more stably assembled on the power tool 7 without being separated from the power tool.

Preferably, the locking mechanism 5 further comprises a spring 54, and the spring 54 is elastically pressed between the combining portion 12 and the control member 51, so that the concave hole 511 is normally dislocated from the through hole set 52.

Finally, it should be added that, depending on the requirements, the present invention is not limited to the above aspects, but the outer sleeve 2 shown in the first embodiment of fig. 1 to 8 may be eliminated, and only the main rod 1A and the ejection mechanism 3A are retained for use as shown in the ninth embodiment of fig. 16 to 17. Moreover, the recess 511 of the first embodiment can be replaced by a ring recess 512 to simplify the operation of the control member, so that the user can quickly release the control member by moving the control member 51A in the axial direction, thereby achieving the purpose of quick release. In addition, the contour of the inner wall of the first engaging portion 14A, the contour of the outer annular wall 322C, and the contour of the inner annular wall 323D are all rectangular for uniformity of production.

Of course, as shown in the tenth embodiment shown in fig. 18, the contour shape of the inner wall of the first engaging portion 14B, the contour shape of the outer annular wall 322D, and the contour shape of the inner annular wall 323E may be hexagonal to meet the common requirement.

To sum up, the utility model discloses the sleeve provides two kinds of not unidimensional cup joints portion for the user chooses for use, sets up ejection mechanism more specially and supports and withstand the article to the combination stability of sleeve and article when strengthening the rotating, and when being used for the unscrewing operation, ejection mechanism can push away the sleeve so that the user takes with the article is automatic, and is convenient and quick fairly.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A sleeve, comprising:

the main rod piece comprises an axis, a combination part, a body and a first sleeving part, wherein the combination part is connected along the axis, the combination part is used for being connected with a power tool, the body is surrounded by an inner space, the first sleeving part is surrounded by a sleeving space, and the sleeving space is communicated with the inner space and is used for sleeving a first object;

the outer sleeve part comprises a second sleeving part which can slide along the axis direction and is sleeved on the main rod part at a use position and a containing position, and when the main rod part is at the use position, the second sleeving part protrudes out of the first sleeving part to be sleeved with a second object;

the pushing-out mechanism comprises a pushing-out piece and an elastic piece, wherein the pushing-out piece can be movably inserted into the inner space along the axis direction, the elastic piece is positioned in the inner space and is propped between the main rod piece and the pushing-out piece, and the elastic piece is used for driving a propping part of the pushing-out piece to normally push and prop the first object to move towards the direction far away from the combining part in the sleeving-connecting space.

2. The socket of claim 1, wherein the pushing member further comprises a through hole, the through hole is disposed on an abutting surface of the abutting portion along the axis, the through hole is communicated with the receiving space, and the abutting surface abuts against the first object.

3. The socket of claim 2, wherein the abutting portion further comprises an outer annular wall and an inner annular wall, the abutting surface is connected between the outer annular wall and the inner annular wall, the outer annular wall has a contour shape matching the contour shape of the inner wall of the first engaging portion, and the inner annular wall surrounds the through hole.

4. A socket as claimed in claim 3, wherein the profile of the outer annular wall or the profile of the inner annular wall is selected from circular, rectangular, hexagonal and dodecagonal.

5. The socket of claim 1, further comprising a locking mechanism, the engaging portion defines an insertion hole, the locking mechanism comprises a control member, a through hole set and a locking unit, the through hole set extends through the engaging portion and communicates with the insertion hole, the locking unit is selectively movably received in the through hole set, the control member is movably sleeved on the engaging portion, the control member comprises a recess, and an opening of the recess faces the engaging portion; when the control piece moves to make the concave hole correspond to the through hole group, part of the locking unit can be accommodated in the concave hole without protruding into the inserting hole, and when the control piece moves to make the concave hole and the through hole group dislocated, the inner wall of the control piece presses against the locking unit, and part of the locking unit protrudes into the inserting hole to be connected with the power tool.

6. A socket according to any one of claims 1 to 5, further comprising a magnetic assembly positioned on the abutting surface for magnetically attracting the first object.

7. A socket according to claim 6, wherein the magnetically attractive element is removably positionable on the abutment surface.

8. The socket of claim 7, wherein the magnetic assembly comprises a base plate and at least one magnet, the at least one magnet is positioned on the base plate, one end of the at least one magnet is magnetically attracted to the abutting surface, and the other end of the at least one magnet is magnetically attracted to the first object.

9. The socket of claim 8, wherein a gap is defined between the base plate and the abutting surface in the extending direction of the axis, and the gap allows a foreign object to extend into the gap so as to hook the base plate to be separated from the abutting surface.

10. The socket of claim 4, further comprising a locking mechanism, the engaging portion defines a plug hole, the locking mechanism comprises a control member, a through hole set and a locking unit, the through hole set extends through the engaging portion and communicates with the plug hole, the locking unit is selectively movably received in the through hole set, the control member is movably sleeved on the engaging portion, the control member comprises a recess, and an opening of the recess faces the engaging portion; when the control piece moves to make the concave hole correspond to the through hole group, part of the locking unit can be accommodated in the concave hole without protruding into the inserting hole, and when the control piece moves to make the concave hole and the through hole group dislocated, the inner wall of the control piece presses against the locking unit, and part of the locking unit protrudes into the inserting hole to be connected with the power tool; the sleeve further comprises a magnetic attraction component, the magnetic attraction component is positioned on the abutting surface, and the magnetic attraction component is used for magnetically attracting the first object; the magnetic component is detachably positioned on the abutting surface; the magnetic component comprises a substrate and at least one magnet, the at least one magnet is positioned on the substrate, one end of the at least one magnet is magnetically attracted to the abutting surface, and the other end of the at least one magnet is magnetically attracted to the first object; in the extending direction of the axis, a gap is defined between the substrate and the abutting surface, and the gap is used for a foreign object to extend into so as to hook the substrate to be separated from the abutting surface; the substrate is provided with a group of connecting holes in a penetrating way, the group of connecting holes are correspondingly communicated with the through hole, and the shape of the group of connecting holes is equal to that of the through hole; the number of the at least one magnet is plural, and the plural magnets are symmetrically arranged by the assembling holes; the substrate comprises a first surface and a second surface which are opposite, the first surface is back to the abutting surface, the second surface faces to the abutting surface, the magnets are flush with the first surface, the magnets protrude out of the second surface and abut against the abutting surface to form the gap, and the gap is communicated with the assembling hole; the pushing piece further comprises a head part and a body part, two ends of the body part are respectively connected with the head part and the abutting part, the abutting part is higher than the head part in the direction vertical to the axis, and the head part is higher than the body part; the main rod part further comprises a plurality of positioning holes, the plurality of stopping parts are accommodated in the plurality of positioning holes and protrude out of the inner space, and the plurality of stopping parts stop the head part in the axis direction; a ring sleeve tightly hooping the main rod piece to shield the plurality of positioning holes, wherein the ring sleeve presses against the plurality of stopping pieces to protrude out of the inner space in the direction vertical to the axial direction; when the outer sleeve piece is positioned at the using position, the outer sleeve piece can press against the ring sleeve, and when the outer sleeve piece is positioned at the accommodating position, the end face of the outer sleeve piece does not protrude out of the end face of the first sleeving part in the axial direction; the control member is movably sleeved on the combining portion along the axis and can rotate around the axis; in the axial direction, the abutting part does not protrude out of the end surface of the first sleeving part; the locking mechanism further comprises a spring which elastically supports between the combining part and the control part so as to ensure that the concave hole is normally staggered with the through hole group; the through hole is formed along the axis and entirely penetrates the pushing member, so that the pushing member is in a hollow cylindrical shape.