CN111802704B

CN111802704B - Aerosol generating device

Info

Publication number: CN111802704B
Application number: CN202010590845.6A
Authority: CN
Inventors: 廖振龙; 赵贯云
Original assignee: Shenzhen Woody Vapes Technology Co Ltd
Current assignee: Shenzhen Woody Vapes Technology Co Ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2023-07-28
Anticipated expiration: 2040-06-24
Also published as: CN111802704A

Abstract

The invention provides an aerosol generating device, which comprises a host and a cover body assembly, wherein the host is provided with an opening, the cover body assembly comprises a first rotating body and a second rotating body, the first rotating body is rotatably connected with the host, the second rotating body is covered on the opening, the second rotating body is rotatably connected to the host, and when the first rotating body is rotated, the second rotating body is driven to rotate, so that the second rotating body can open or close the opening. The technical scheme of the invention effectively solves the problem of complex structure of the protective cover of the electronic cigarette inserter in the prior art.

Description

Aerosol generating device

Technical Field

The invention relates to the field of articles for daily use, in particular to an aerosol generating device.

Background

The electronic cigarette is an electronic product imitating cigarettes, and has smoke, taste and feel similar to those of cigarettes. The cigarette cartridge is placed into a cigarette inserting device of an electronic cigarette main body through means of atomization and the like, and aerosol of smoke is formed after liquid in the cigarette cartridge is heated and atomized for a user to inhale. The cartridge can be used continuously by replacing the cartridge with a new cartridge. In the case of not inserting the cigarette bullet, the internal structure of inserting the cigarette ware is not sheltered from, if dust or impurity gets into in exposing the cigarette ware that inserts outward, can influence the heating effect of inserting the cigarette ware, if the texture of impurity is harder, more probably destroys the heat-generating body in inserting the cigarette ware. Therefore, some electronic cigarettes in the market can be provided with a cover body on a cigarette inserting device of the electronic cigarette to shield the cigarette inserting device, so that the cigarette inserting device and the internal structure of the cigarette inserting device are protected.

If the publication number is CN110522087 patent application, the driving medium rotationally sets up the open end in holding the chamber, and a plurality of mobilizable blades shelter from the open end in holding the chamber and link to each other with the driving medium respectively, and when rotatory structure relatively rotated, well spacing connecting piece's effect down the driving medium can drive the blade and keep away from the opening that holds the chamber, makes the opening open.

The structure is complex, and the space for moving the blades is reserved in the electronic cigarette, so that the whole volume of the electronic cigarette is relatively bulky and attractive.

Disclosure of Invention

The invention aims to solve the problem that the protective cover structure of the electronic cigarette inserting device in the prior art is complex. In order to solve the above problems, the aerosol generating device of the present invention includes a main unit and a cover assembly, the main unit is provided with an opening, the cover assembly includes a first rotating body and a second rotating body, the first rotating body is rotatably connected with the main unit, the second rotating body is covered on the opening, the second rotating body is rotatably connected to the main unit, and when the first rotating body is rotated, the second rotating body is driven to rotate, so that the second rotating body opens or closes the opening.

Further, the rotation axis of the first rotating body and the rotation axis of the second rotating body form an included angle.

Further, the first rotating body is provided with a first position and a second position, and when the first rotating body rotates to the first position, the second rotating body is pushed to turn over in the first direction, so that the second rotating body opens the opening; when the first rotating body moves to the second position, the second rotating body is pushed to turn over in the second direction, so that the second rotating body closes the opening.

Further, the aerosol generating device further comprises a transmission structure, wherein the transmission structure is rotatably arranged on the host machine and connected with the first rotating body, and when the first rotating body rotates, the transmission structure synchronously rotates with the first rotating body and drives the second rotating body to rotate.

Further, the first rotating body is provided with a first position and a second position, when the first rotating body rotates to the first position, the transmission mechanism is driven to rotate, and the transmission mechanism pushes the second rotating body to overturn towards the first direction, so that the second rotating body opens the opening; when the first rotating body moves to the second position, the transmission mechanism is driven to rotate, and the transmission mechanism pushes the second rotating body to overturn towards the second direction, so that the second rotating body closes the opening.

Further, the first position is provided with a first driving part, the second position is provided with a second driving part, the second rotating body is provided with a driven part, and the driven part is positioned between the first driving part and the second driving part; the first driving part or the second driving part drives the second rotating body to turn over by driving the driven part. 7. Further, the cover assembly further comprises a support, the support is arranged on the host, a first supporting portion and a second supporting portion are arranged on the turnover path of the second rotating body, when the opening is opened, the first supporting portion supports the second rotating body, and when the opening is closed, the second supporting portion supports the second rotating body.

Further, the transmission structure comprises a driving ring and a driven part, the driving ring is rotatably arranged on the bracket and rotates synchronously with the first rotating body, and the driving ring drives the second rotating body to turn over by pushing the driven part.

Further, the driven part comprises a driving shaft and a driven block which are connected with each other, the driving shaft penetrates through the bracket and is connected with the second rotating body, and the driving ring can drive the driven block to rotate, so that the driving shaft drives the second rotating body to rotate.

Further, the driving ring comprises a ring part and two driving blocks arranged at intervals, the two driving blocks are arranged on the ring part, the driven block is positioned between the two driving blocks, and the two driving blocks respectively push the driven block to rotate in opposite directions.

Further, the driving ring further includes a limiting portion provided on the ring portion and extending toward a center of the ring portion, and the bracket supports the limiting portion in a case where the driving ring is assembled to the bracket.

Further, the driving ring further comprises a positioning groove, the first rotating body is provided with a positioning protrusion, the positioning protrusion is matched with the positioning groove, or the driving ring further comprises a positioning protrusion, the first rotating body is provided with a positioning groove, and the positioning protrusion is matched with the positioning groove.

Further, a driving surface is arranged on the driving shaft, a driven surface is arranged on the second rotating body, and the driving surface rotates along with the driving shaft to drive the driven surface to rotate, so that the second rotating body is overturned.

Further, the transmission structure further comprises a positioning shaft, wherein the positioning shaft and the driving shaft are coaxially arranged on the bracket and penetrate through the second rotating body.

Further, the support is provided with a clasp, the first rotating body is provided with a chute, and the clasp can extend into the chute and slide in the chute.

Further, the transmission structure comprises a sleeve and a support, the sleeve is arranged on the host and is in driving connection with the first rotating body, the support is arranged on the host, the second rotating body is rotatably arranged on the support, a groove is formed in the sleeve, a poking position is arranged on the second rotating body, the poking position stretches into the groove, and when the sleeve rotates, the groove wall of the groove can push the poking position to swing, so that the second rotating body can overturn.

Further, the sleeve further comprises a positioning groove, the first rotating body is provided with a positioning protrusion, the positioning protrusion is matched with the positioning groove, or the sleeve further comprises a positioning protrusion, the first rotating body is provided with a positioning groove, and the positioning protrusion is matched with the positioning groove.

The implementation of the embodiment of the invention has the following beneficial effects:

the first rotating body rotates to drive the second rotating body to rotate, so that the second rotating body can open or close the opening. When the aerosol generating device is idle, the first rotating body is rotated to enable the second rotating body to close the opening, so that dust and impurities are prevented from entering the aerosol generating device, and internal parts of the aerosol generating device are protected; when the aerosol-generating device is in use, an aerosol capsule for generating an aerosol can be mounted in the aerosol-generating device by rotating the first rotating body such that the second rotating body opens the opening. The structure is simple, the operation is easy, and the movement of the blades in the plane in the prior art is converted into the overturning in the space, so that the volume of the cover body assembly is not obviously changed between two states. Therefore, a movable viewing space is not required to be reserved for the second rotating body, the structure of the cover body assembly is effectively simplified, and the volume of the cover body assembly is reduced.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

fig. 1 shows a schematic exploded structure of an embodiment one of an aerosol-generating device according to the invention;

fig. 2 shows a schematic cross-sectional structure of the aerosol-generating device of fig. 1;

fig. 3 shows a partially enlarged schematic construction of the aerosol-generating device of fig. 2 at a;

fig. 4 shows a schematic structural view of a second rotating body, a bracket, a driving ring and a driven part of the aerosol-generating device of fig. 1;

FIG. 5 shows a schematic view of the aerosol-generating device of FIG. 1 with a second rotating body in a retracted position;

fig. 6 shows a schematic structural view of the second rotating body of the aerosol-generating device of fig. 1 in a blocking position;

fig. 7 shows a schematic exploded structure of a second embodiment of an aerosol-generating device according to the invention;

fig. 8 shows a schematic cross-sectional structure of the aerosol-generating device of fig. 7;

fig. 9 shows a partially enlarged structural schematic diagram of the aerosol-generating device of fig. 8 at B;

fig. 10 shows a schematic structural view of a second rotating body of the aerosol-generating device of fig. 7;

FIG. 11 shows a schematic structural view of the second rotating body of the aerosol-generating device of FIG. 7 in a retracted position; and

fig. 12 shows a schematic structural view of the second rotating body of the aerosol-generating device of fig. 7 in a blocking position.

The above figures contain the following reference numerals:

1. a host; 2. a cover assembly; 10. a first rotating body; 11. a first opening; 12. a chute; 17. a positioning groove; 20. a second rotating body; 21. a second opening; 22. a driven surface; 23. toggle; 24. a pivot; 30. a drive ring; 31. a ring portion; 32. a driving block; 33. a limit part; 34. a positioning groove; 40. a bracket; 41. a clasp; 42. a first support portion; 43. a second supporting part; 50. a driven part; 51. a drive shaft; 52. a driven block; 53. a driving surface; 60. positioning a shaft; 70. a sleeve; 71. a groove; 72. positioning the bulge; 80. a bracket; 81. an upper bracket; 82. a lower bracket; 90. a cigarette inserting device.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many other different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Embodiment one:

as shown in fig. 1, the aerosol generating device of the first embodiment includes a main unit 1 and a cover assembly 2, a cigarette inserting device 90 is disposed in the main unit 1, an opening for installing a cigarette is disposed on the cigarette inserting device 90, the cover assembly 2 includes a first rotating body 10 and a second rotating body 20, the first rotating body 10 is rotatably connected with the main unit 1, the second rotating body 10 is covered at the opening, the second rotating body 20 is rotatably disposed on the main unit 1, and when the first rotating body 10 is rotated, the first rotating body 10 can drive the second rotating body 20 to rotate so that the second rotating body 20 opens or closes the opening.

By applying the technical scheme of the embodiment, the first rotating body 10 rotates to drive the second rotating body 20 to rotate, so that the opening of the smoke inserting device 90 is opened or closed by the second rotating body 20. When the aerosol generating device is idle, the first rotating body 10 is rotated to enable the second rotating body 20 to rotate to close the opening, so that dust and impurities are prevented from entering the interior of the aerosol generating device, and the internal parts of the aerosol generating device are protected; when the aerosol-generating device is in use, an aerosol capsule for generating an aerosol can be mounted in the aerosol-generating device by rotating the first rotating body 10 such that the second rotating body 20 rotates to open the opening. The structure is simple, the operation is easy, and the movement of the blades in the plane in the prior art is converted into the overturning in the space, so that the volume of the cover body assembly 2 is not obviously changed between two states. Thus, a movable viewing space is not required to be reserved for the second rotating body 20, the structure of the cover body assembly 2 is effectively simplified, and the volume of the cover body assembly 2 is reduced.

Preferably, the rotation axis of the first rotating body 10 of the present embodiment is perpendicular to the rotation axis of the second rotating body 20.

As shown in fig. 1 and 2, the first rotary body 10 of the present embodiment is provided with a first opening 11, the first opening 11 is provided corresponding to the open end, the second rotary body 20 is provided with a second opening 21, the second rotary body 20 has a retracted position (as shown in fig. 5) in which the second opening 21 corresponds to the open end, and a blocking position (as shown in fig. 6) in which the second opening 21 is offset from the open end, and the first rotary body 10 is capable of driving the second rotary body 20 to rotate between the retracted position and the blocking position.

As shown in fig. 1, the aerosol generating device of the present embodiment further includes a transmission structure and a bracket 40, the transmission structure includes a driving ring 30 and a driven portion 50, the bracket 40 is disposed on the host 10, the driving ring 30 is rotatably disposed on the bracket 40, and when the first rotating body 10 rotates, the driving ring 30 can rotate synchronously with the first rotating body 10 and push the driven portion 50 to rotate, so that the second rotating body 20 is turned over.

Specifically, as shown in fig. 3 and 4, the drive ring 30 includes a ring portion 31 and two drive blocks 32 disposed at intervals, the two drive blocks 32 are disposed on the ring portion 31, the driven block 52 is located between the two drive blocks 31, and the two drive blocks 31 are capable of rotating the driven block 52 in two directions. The driven portion 50 includes a driving shaft 51 and a driven block 52 connected to each other, and the driving shaft 51 is provided in the bracket 40.

When the second rotating body 20 is at the avoiding position, as shown in fig. 5, the first rotating body 10 is rotated along the arrow direction in the drawing, one driving block 32 approaches the driven block 52 to contact with the driven block 52, and continues to rotate the first rotating body 10, and the driving block 32 pushes the driven block 52 to rotate around the axis of the driving shaft 51, so as to drive the second rotating body 20 to rotate to the shielding position as shown in fig. 6, and the second opening 21 is dislocated with the first opening 11. On the contrary, as shown in fig. 6, when the second rotating body 20 is in the shielding position, the first rotating body 10 is reversely rotated, the other driving block 32 approaches the driven block 52 to contact with the driven block 52, and continues to rotate the first rotating body 10, the driving block 32 pushes the driven block 52 to rotate around the axis of the driving shaft 51, so as to drive the second rotating body 20 to rotate to the avoiding position shown in fig. 5, so that the second opening 21 corresponds to the first opening 11, and at this time, the aerosol capsule can enter the cigarette inserting device 90 through the first opening 11 and the second opening 21 once.

Specifically, as shown in fig. 4, a driving surface 53 is disposed on the driving shaft 51 of the present embodiment, and a driven surface 22 is disposed on the second rotating body 20, where the driving surface 53 cooperates with the driven surface 22 to transmit torque to the second rotating body 20, so that the second rotating body 20 can rotate between the avoidance position and the shielding position along with the rotation of the driven portion 50.

It should be noted that, in other embodiments not shown in the drawings, the orientations and specific numbers of the driving surfaces and the driven surfaces may be adaptively set as needed.

Further, as shown in fig. 4, the transmission structure of the present embodiment further includes a positioning shaft 60, and the positioning shaft 60 is disposed coaxially with the driving shaft 53 on the bracket 40 and penetrates the second rotating body 20. The positioning shaft 60 and the driving shaft 53 define the position of the rotation axis of the second rotating body 20, preventing the first rotating body 10 from being shifted from the rotation axis of the second rotating body 20 during the rotation of the second rotating body 20.

As shown in fig. 1, the driving ring 30 of the present embodiment further includes a stopper 33 provided on the ring 31 and protruding toward the center of the ring 31, the stopper 33 being in contact with the bracket 40 and restricting the relative position between the driving ring 30 and the bracket 40 during rotation when the driving ring 30 is assembled to the bracket 40.

As shown in fig. 1, the driving ring 30 of the present embodiment further includes a positioning groove 34, and a positioning protrusion (not shown in the drawing) is provided on the first rotating body 10, and the positioning protrusion is adapted to the positioning groove 34. In rotating the first rotating body 10, the positioning projections drive the driving ring 30 to rotate through the positioning grooves 34, thereby driving the second rotating body 20 to turn over. In other embodiments not shown in the figures, positioning protrusions may also be provided on the drive ring, and correspondingly, the first rotation body is provided with positioning grooves, the positioning protrusions being adapted to the positioning grooves.

As shown in fig. 1, 3 and 4, a hook 41 is provided on the bracket 40 of the present embodiment, a chute 12 is provided on the first rotating body 10, and the hook 41 can extend into the chute 12 when the first rotating body 10 is covered on the bracket 40. When the first rotating body 10 rotates, the clasp 41 slides in the chute 12, preventing the first rotating body 10 from being disengaged from the bracket 40.

The bracket 40 is further provided with a first support portion 42 and a second support portion 43, as shown in fig. 4, when the opening is opened, the second rotating body 20 is in contact with the first support portion 42, and the first support portion 42 supports the second rotating body 20; as shown in fig. 6, when the opening is closed, the second rotating body 20 contacts the second supporting portion 43, and the second supporting portion 43 supports the second rotating body 20.

Embodiment two:

the aerosol-generating device of the second embodiment provides a different structural form than that of the first embodiment, and achieves the same uncovering effect. Specifically, as shown in fig. 7 to 9, the transmission structure of the second embodiment includes a sleeve 70 and a bracket 80, the sleeve 70 is disposed on the host 1 and is in driving connection with the first rotating body 10, the bracket 80 is disposed on the host 1, the second rotating body 20 is rotatably disposed on the bracket 80, a groove 71 is disposed on the sleeve 70, a toggle bit 23 is disposed on the second rotating body 20, and the toggle bit 23 extends into the groove 71.

As shown in fig. 12, when the second rotating body 20 is in the shielding position, the first rotating body 10 is rotated along the direction indicated by the arrow in the drawing, the groove wall on one side of the groove 71 is close to the poking position 23 to contact, the first rotating body 10 is continuously rotated, the poking position 23 is pushed by the groove wall to rotate around the axis of the pivot 23, and the second rotating body 20 is further driven to rotate to the avoiding position shown in fig. 11, so that the second opening 21 corresponds to the first opening 11, and at this time, the aerosol capsule can enter the smoke plug 90 through the first opening 11 and the second opening 21 once. Conversely, when the second rotating body 20 is in the retracted position as shown in fig. 11, the first rotating body 10 is rotated in the reverse direction, so that the second rotating body 20 is rotated to the blocking position as shown in fig. 12, and the second opening 21 is displaced from the first opening 11.

Specifically, as shown in fig. 11 and 12, the sleeve 70 of the present embodiment further includes a positioning protrusion 72, and the first rotating body 10 is provided with a positioning groove 17, and the positioning protrusion 72 is adapted to the positioning groove 17.

In other embodiments not shown in the figures, the positioning grooves and the positioning protrusions may be reversed, i.e. the first rotating body is provided with positioning protrusions, and the sleeve is provided with positioning grooves, which are adapted to allow the sleeve to rotate synchronously with the first rotating body.

As shown in fig. 7 to 10, the bracket 80 of the present embodiment includes an upper bracket 81 and a lower bracket 82, the upper bracket 81 and the lower bracket 82 being connected by a fastener and being capable of being fixed to the sleeve 70, the second rotating body 20 being provided with a pivot shaft 24, the pivot shaft 24 being capable of extending into a hole of the upper bracket 81 so that the second rotating body 20 can be turned over on the upper bracket 81.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The aerosol generating device is characterized by comprising a host machine and a cover body assembly, wherein the host machine is provided with an opening, the cover body assembly comprises a first rotating body and a second rotating body, the first rotating body is rotatably connected with the host machine, the second rotating body is covered on the opening, and the second rotating body is rotatably connected with the host machine;

the first rotating body is provided with a first position and a second position, and when the first rotating body rotates to the first position, the second rotating body is pushed to turn over in a first direction; when the first rotating body moves to a second position, the second rotating body is pushed to turn over in a second direction;

the first position is provided with a first driving part, the second position is provided with a second driving part, the second rotating body is provided with a driven part, and the driven part is positioned between the first driving part and the second driving part; the first driving part or the second driving part drives the second rotating body to turn over by driving the driven part, so that the second rotating body opens or closes the opening.

2. The aerosol-generating device of claim 1, wherein the axis of rotation of the first rotating body and the axis of rotation of the second rotating body form an included angle.

3. The aerosol generating device of claim 1, further comprising a transmission structure rotatably mounted on the host machine and coupled to the first rotating body, the transmission structure rotating in synchronization with the first rotating body and driving the second rotating body to rotate when the first rotating body is rotated.

4. An aerosol generating device according to claim 3, wherein when the first rotating body rotates to a first position, the transmission mechanism is driven to rotate, and the transmission mechanism pushes the second rotating body to turn in a first direction, so that the second rotating body opens the opening; when the first rotating body moves to the second position, the transmission mechanism is driven to rotate, and the transmission mechanism pushes the second rotating body to overturn towards the second direction, so that the second rotating body closes the opening.

5. The aerosol generating device according to claim 3 or 4, wherein the cover assembly further comprises a bracket provided on the main body, the bracket being provided with a first supporting portion and a second supporting portion on a turning path of the second rotating body, the first supporting portion supporting the second rotating body when the opening is opened, and the second supporting portion supporting the second rotating body when the opening is closed.

6. The aerosol generating device of claim 5, wherein the transmission structure comprises a driving ring and a driven portion, the driving ring is rotatably disposed on the bracket and rotates synchronously with the first rotating body, and the driving ring drives the second rotating body to turn over by pushing against the driven portion.

7. The aerosol generating device of claim 6, wherein the driven portion comprises a driving shaft and a driven block connected to each other, the driving shaft is disposed in the bracket in a penetrating manner and connected to the second rotating body, and the driving ring is capable of driving the driven block to rotate, so that the driving shaft drives the second rotating body to rotate.

8. The aerosol generating device of claim 7, wherein the drive ring comprises a ring portion and two spaced apart drive blocks, the two drive blocks being disposed on the ring portion, the driven blocks being positioned between the two drive blocks, the two drive blocks respectively pushing the driven blocks to rotate in opposite directions.

9. The aerosol generating device of claim 8, wherein the drive ring further comprises a stopper portion provided on the ring portion and protruding toward a center of the ring portion, the holder supporting the stopper portion with the drive ring assembled to the holder.

10. The aerosol generating device of claim 8, wherein the drive ring further comprises a positioning groove, the first rotating body is provided with a positioning protrusion, the positioning protrusion is matched with the positioning groove, or the drive ring further comprises a positioning protrusion, the first rotating body is provided with a positioning groove, and the positioning protrusion is matched with the positioning groove.

11. The aerosol generating device of claim 7, wherein a driving surface is disposed on the driving shaft, and a driven surface is disposed on the second rotating body, and the driving surface rotates with the driving shaft to rotate the driven surface, so that the second rotating body turns over.

12. The aerosol-generating device of claim 7, wherein the transmission structure further comprises a positioning shaft disposed on the bracket coaxially with the drive shaft and penetrating in the second rotating body.

13. The aerosol generating device of claim 7, wherein the bracket is provided with a clasp, and the first rotator is provided with a chute, and the clasp is capable of extending into and sliding in the chute.

14. An aerosol generating device according to claim 3, wherein the transmission structure comprises a sleeve and a bracket, the sleeve is arranged on the host and is in driving connection with the first rotating body, the bracket is arranged on the host, the second rotating body is rotatably arranged on the bracket, a groove is arranged on the sleeve, a poking position is arranged on the second rotating body, the poking position stretches into the groove, and when the sleeve rotates, the groove wall of the groove can push the poking position to swing, so that the second rotating body can be overturned.

15. The aerosol generating device of claim 14, wherein the sleeve further comprises a positioning groove, the first rotating body is provided with a positioning protrusion, the positioning protrusion is matched with the positioning groove, or the sleeve further comprises a positioning protrusion, the first rotating body is provided with a positioning groove, and the positioning protrusion is matched with the positioning groove.