CN220151083U - Handle assembly - Google Patents

Abstract

The utility model provides a handle assembly, which further comprises: the wheel tooth comprises a first columnar part, and a movement groove is formed in the periphery of the first columnar part; the handle is rotationally connected with the wheel teeth in a way that the wheel teeth are positioned in the accommodating cavity; the rotary core comprises a gear section and a prism section, the periphery of the gear section is provided with a first tooth, and the rotary core is assembled on the tooth in a mode that the gear section is arranged in the motion groove and the prism section penetrates out to the front end of the tooth; the gear ring comprises a central through hole, the gear ring is fixed in the accommodating cavity of the handle in a mode that the central through hole is sleeved on the first columnar part of the gear tooth, and the inner side of the gear ring is provided with a second gear tooth meshed with the first gear tooth; the handle component is connected with the eccentrically arranged rotating core in parallel by following the rotation of the handle through the toothed ring, so that the handle component is convenient to assemble to a window frame or a door frame with smaller width.

Description

Handle assembly

Technical Field

The utility model relates to the technical field of hardware fittings, in particular to a handle assembly.

Background

The traditional aluminum alloy window frame manufactured by adopting the aluminum profile has the defect that the window frame cannot meet the aesthetic requirements of consumers due to the large width of the window frame, so that the narrow-side window frame is generated. But the conventional handle cannot be normally installed due to the change of the width of the window frame. Based on this, there is a need to provide a handle assembly to solve the foregoing technical problems.

Disclosure of Invention

The utility model aims to solve the technical problem that the existing handle cannot be matched with a window frame with a narrow edge, and provides a handle assembly aiming at the problems.

The technical scheme for solving the technical problems is that the handle assembly is arranged on a door leaf or a window sash, wherein the handle assembly comprises a handle with a containing cavity; the handle assembly further includes:

the wheel tooth comprises a first columnar part, and a movement groove arranged along the axial direction of the wheel tooth is formed in the periphery of the first columnar part;

the rotary core comprises a gear section and a prism section which are coaxially arranged and connected, the periphery of the gear section is provided with a first tooth, and the rotary core is assembled on the tooth in a mode that the gear section is arranged in the motion groove and the prism section penetrates out to the front end of the tooth;

the toothed ring comprises a central through hole and second teeth positioned on the inner side wall of the central through hole, the toothed ring is fixed in a holding cavity of the handle, and the handle is rotationally connected with the teeth in a mode that the first columnar part is positioned in the holding cavity, and the second teeth of the toothed ring are meshed with the first teeth of the rotating core.

In one embodiment, the handle assembly comprises at least one positioning component installed in the accommodating cavity, wherein the positioning component is located at one end of the first columnar part of the tooth facing away from the base plate, and enables the handle to generate vibration sound when the handle rotates by a preset angle.

In one embodiment, each positioning component comprises a ball and a spring, the end face of the first columnar part of the tooth facing the positioning component is provided with a plurality of positioning grooves matched with the ball, and the positioning grooves are positioned on the same circumference taking the rotation axis of the handle as the center;

each positioning component is assembled in the accommodating cavity in a mode that the front end of the ball is pushed by the spring to be embedded into the positioning groove, the ball overcomes the elastic force of the spring in the rotation process of the handle and is separated from the positioning groove, and the spring pushes the front end of the ball to be embedded into the next positioning groove when the ball reaches the next positioning groove.

In one embodiment, each positioning component further comprises a positioning column, the ball and the spring are arranged in the positioning column, and at least one part of the ball is exposed out of the end face of the positioning column under the pushing of the elastic force of the spring;

the holding cavity is provided with a first limit groove which is matched with the positioning column and is arranged along the direction parallel to the rotating shaft of the handle, and the positioning column is assembled in the first limit groove in a way that the front end of the ball is exposed out of the first limit groove.

In one embodiment, the first columnar portion is cylindrical; the accommodating cavity comprises a second limit groove matched with the shape of the first columnar part, the first limit groove is positioned at the bottom of the second limit groove, and when the tooth is assembled to the handle, the front end of the first columnar part of the tooth is inserted into the second limit groove.

In one embodiment, the cross section of the outer side wall of the toothed ring is a regular polygon; the accommodating cavity comprises a third limit groove with the side wall being matched with the outer side wall of the toothed ring, the second limit groove is located at the bottom of the third limit groove, and the toothed ring is arranged in the third limit groove.

In one embodiment, the number of the positioning parts is 4, and the adjacent positioning parts are separated by 90 degrees; the number of the first limit grooves and the number of the positioning grooves are corresponding to the number of the positioning parts.

In one embodiment, the handle assembly further comprises a screw in the shape of a stepped shaft; the bottom wall of the accommodating cavity is provided with a first mounting hole arranged along the direction of the rotating shaft of the handle, and the tooth is provided with a second mounting hole which is matched with the first mounting hole and is in a through step shape;

the wheel tooth is fixed with the handle through the screw, and the screw penetrates through the second mounting hole and is in threaded connection with the first mounting hole.

In one embodiment, the tooth further comprises a second cylindrical portion positioned at the front end of the first cylindrical portion, and the second cylindrical portion is cylindrical;

the accommodating cavity comprises a fourth limit groove matched with the second cylindrical part, and when the tooth is assembled to the handle, the second cylindrical part is attached to the side wall of the fourth limit groove.

In one embodiment, the handle assembly further comprises a handle pad assembled at the opening of the accommodating cavity, the handle pad is provided with a first mounting column and a third mounting hole positioned beside the first mounting column, and the tooth is provided with a fourth mounting hole matched with the first mounting column and a second mounting column matched with the third mounting hole.

The utility model has the beneficial effects that: the handle assembly is convenient to assemble to the window frame or the door frame with smaller width by following the handle to rotate through the toothed ring and connecting with the eccentrically arranged rotating core.

Drawings

FIG. 1 is a schematic view of a handle assembly according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the handle assembly of FIG. 1 in accordance with the present utility model;

FIG. 3 is a cross-sectional view of the handle assembly of FIG. 1 in accordance with the present utility model;

FIG. 4 is a schematic view of the structure of the handle of FIG. 1 according to the present utility model;

FIG. 5 is a schematic view of the one directional structure of the tooth in FIG. 1 in accordance with the present utility model;

FIG. 6 is a schematic view of the alternate orientation of the tooth of FIG. 1 in accordance with the present utility model;

fig. 7 is an enlarged schematic view of the handle pad of fig. 1 according to the present utility model.

Reference numerals:

1-a handle assembly;

10-handle; 100-accommodating cavity; 1000-a first limit groove; 1001-a first mounting hole; 1002-a second limit groove; 1003-third limit groove; 1004-a fourth limit groove;

101-teeth; 1010—a first columnar portion; 1010 a-a positioning groove; 1011-second column; 1012-a movement groove; 1013-a second mounting hole; 1014-a second mounting post; 1015-fourth mounting holes;

102-rotating the core; 1020-gear segment; 1020 a-first tooth; 1021-prism section;

103-tooth ring; 1030-a central through hole; 1030 a-second tooth;

104-positioning the component; 1040-balls; 1041-positioning columns; 1041 a-skirt;

105-screw; 106-a gasket;

11-handle grip pad; 110-a first mounting post; 111-third mounting hole.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1, the present utility model provides a handle assembly 1, which is applied to a door leaf or window sash having a small width, and cooperates with a lock body assembly to open and close a door or window.

In connection with fig. 2, the handle assembly 1 is mounted on a door leaf or window sash. The handle assembly 1 includes a handle 10 having a receiving cavity 100. Specifically, the shape of the accommodating chamber 100 is substantially cylindrical. In other embodiments, the shape of the receiving cavity 100 is not limited. For example, the housing chamber 100 may have a rectangular parallelepiped shape.

The handle assembly 1 comprises a tooth 101 formed by combining a cylindrical structure and a cake-shaped structure; alternatively, the vertical cross-sectional shape of the tooth 101 is substantially convex. The handle 10 (or the handle assembly 1) is mounted on a window sash or a door leaf through the handle 101 by fixing the handle 101 with the handle 10. Specifically, the tooth 101 includes a first columnar portion 1010 and a second columnar portion 1011 (refer to the following for details). When the tooth 101 is fixed to the handle 10, the first columnar portion 1010 is located in the accommodating chamber 100). The first columnar portion 1010 has a movement groove 1012 provided on the outer periphery thereof in the axial direction of the tooth 101, that is, the movement groove 1012 is provided eccentrically on the tooth 101 (the center axis of the movement groove 1012 does not coincide with the center axis of the tooth 101), and the movement groove 1012 extends through the second columnar portion 1011 (that is, the end face of the second columnar portion 1011 is fitted with an opening of the movement groove 1012) so as to transmit the rotational moment of the handle 10 to the cylinder of the lock body through the cylinder 102 (refer to the following for details). In other words, the handle 10 is rotatably connected to the tooth 101 in such a manner that the tooth 101 is located in the accommodating cavity 100 (it should be noted that the handle 10 transmits the rotational moment to the tooth ring 103, wherein the tooth ring 103 is engaged with the rotary core 102, so that the rotational moment can be sequentially transmitted to the lock cylinder of the lock body through the tooth ring 103 and the rotary core 102). The handle 10 is indirectly rotatably connected to the tooth 101 (see below for details).

More specifically, the movement slots 1012 are configured to receive and provide for rotation of the rotor 102 about a central axis. The rotary core 102 comprises a gear section 1020, a prism section 1021 and a cylindrical section which are coaxially arranged and connected. Wherein the prism section 1021 is located between the gear section 1020 and the cylindrical section. Obviously, the prismatic section 1021 is rotatably connected to the cylinder of the lock body through the front end of the tooth 101. Specifically, the outer circumference of the gear segment 1020 has a first tooth 1020a. It will be appreciated that the transmission of the torque of the handle 10 to the rotary core 102 through the toothed ring 103 is achieved through a gear transmission as described above. And the gear section 1020 of the rotary core 102 is fitted to the movement groove 1012, that is, the rotary core 102 is fitted to the tooth 101 in such a manner that the gear section 1020 is fitted to the movement groove 1012 and the prism section 1021 passes out of the front end of the tooth 101. It is apparent that when the gear section 1020 is mounted to the movement groove 1012, the first teeth 1020a are exposed to the outside of the movement groove 1012 so as to transmit the rotation moment outputted from the handle 10 by the cooperation of the first teeth 1020a and the second teeth 1030 a. Since the shape of the gear segment 1020 is substantially cylindrical, the shape of the movement groove 1012 may also be substantially cylindrical, and the shape of the movement groove 1012 changes as the shape of the gear segment 1020 of the rotating core 102 changes. In other embodiments, the shape of the movement slots 1012 is not limited.

In particular, a side wall of the moving slot 1012 away from the second cylindrical portion 1011 has a blind hole, into which the cylindrical section of the rotary core 102 is inserted when the rotary core 102 is mounted in the moving slot 1012, so that a gap is formed between the first tooth 1020a of the gear section 1020 and the side wall of the moving slot 1012 to facilitate the rotation of the rotary core 102.

The handle assembly 1 further comprises a toothed ring 103 cooperating with the gear segment 1020 of the rotary core 102. The toothed ring 103 includes a central through hole 1030 and a second tooth 1030a located on an inner side wall of the central through hole 1030, and the toothed ring 103 is fixed in the accommodating cavity 100 of the handle 10. That is, the handle 10 is rotatably connected to the tooth 101 such that the first columnar portion 1010 is located in the accommodating chamber 100 and the second tooth 1030a of the ring gear 103 is engaged with the first tooth 1020a of the rotary core 102. Based on this, when the handle 10 rotates, the toothed ring 103 moves in synchronization with the handle 10. Meanwhile, the inner side of the tooth ring 103 is provided with the second teeth 1030a meshed with the first teeth 1020a, so that the rotation of the tooth ring 103 drives the rotary core 102 to rotate, and the rotary moment is transmitted to the lock cylinder of the lock body by the rotary core 102. In the above-described process, the tooth 101 is always in a stationary state.

In a specific embodiment, the handle assembly 1 includes at least one positioning member 104 mounted in the receiving cavity 100, and the handle 10 includes a corresponding number of locking positions (see below for details) to the number of positioning members 104. Wherein the positioning member 104 is located at an end of the first columnar portion 1010 of the tooth 101 facing away from the second columnar portion 1011, so as to increase the rotational resistance of the handle 10 by the cooperation of the positioning member 104 and the tooth 101. During the rotation of the handle 10, the handle 10 rotates by a preset angle, that is, the handle 10 is switched from one locking position to the other locking position, so that the handle 10 of the handle assembly 1 is in a pause. In other words, during rotation of the handle 10, the positioning member 104 moves from one locking position on the tooth 101 to another locking position on the tooth 101 (or, the next locking position on the tooth 101), the positioning member 104 is locked again by the first columnar portion 1010 of the tooth 101 to cause the handle 10 to come into a jerk (since the positioning member 104 is always at one locking position on the tooth 101 (i.e., the first columnar portion 1010 of the tooth 101), the movement of the positioning member 104 from one locking position on the tooth 101 to another locking position on the tooth 101 causes the positioning member 104 to lock again the first columnar portion 1010 of the tooth 101).

In a specific embodiment, referring to fig. 3 and 4, each positioning member 104 includes a ball 1040 and a spring, and the end surface of the first cylindrical portion 1010 of the tooth 101 facing the positioning member 104 has a plurality of positioning grooves 1010a matching the shape of the ball 1040 (or the shape of the front end of the ball 1040), so that the ball 1040 is inserted into the positioning grooves 1010a to lock the positioning member 104 with the first cylindrical portion 1010 of the tooth 101 again when the positioning member 104 moves from one locking position on the tooth 101 to another locking position on the tooth 101. It is apparent that the number of positioning grooves 1010a corresponds to the number of positioning members 104.

Since the positioning member 104 rotates following the handle 10 during the rotation of the handle 10, the plurality of positioning grooves 1010a are located on the same circumference centering on the rotation axis of the handle 10, and the plurality of positioning grooves 1010a are uniformly spaced apart on the circumference centering on the rotation axis of the handle 10. It is obvious that the central angle between the adjacent positioning groove 1010a and the circle is the preset angle. In summary, each positioning member 104 is assembled in the accommodating cavity 100 in such a way that the spring pushes the ball 1040 to be partially embedded in the positioning groove 1010a, the ball 1040 is separated from the positioning groove 1010a against the elastic force of the spring during the rotation of the handle 10, and the spring pushes the front portion of the ball 1040 to be embedded in the next positioning groove 1010a when the ball 1040 reaches the next positioning groove 1010a, so as to realize the switching from one locking position on the tooth 101 to another locking position on the tooth 101 during the rotation of the handle 10.

In a specific embodiment, each positioning member 104 further includes a positioning post 1041, and specifically, the positioning post 1041 may be cylindrical in shape. In other embodiments, the shape of the positioning post 1041 is not limited. Wherein, the ball 1040 and the spring are both mounted in the positioning column 1041. It should be noted that, at least a portion of the balls 1040 is always exposed to the end face of the positioning column 1041 under the urging of the elastic force of the spring, and more specifically, when the handle 10 is at each locking position, the front ends of the balls 1040 in the positioning column 1041 are embedded in the positioning grooves 1010a corresponding to the locking positions. Obviously, the number of locking positions also corresponds to the number of positioning grooves 1010 a. When the handle 10 is in the unlocked position, that is, when the handle 10 is switched from one locked position to another, the front ends of the balls 1040 in the positioning column 1041 are pressed against the end surfaces of the first columnar portions 1010 of the lugs 101.

Corresponding to the positioning groove 1010a described above, the cavity wall of the accommodating cavity 100 has the first limiting groove 1000 adapted to the positioning column 1041 and disposed along the direction parallel to the rotation axis of the handle 10, and the positioning column 1041 may be cylindrical, so the first limiting groove 1000 may also be cylindrical. The positioning column 1041 is assembled in the first limit groove 1000 in such a manner that the front end of the ball 1040 is exposed to the outside of the first limit groove 1000, so that the handle 10 is switched from one locking position to the other locking position by the movement of the positioning member 104 from one positioning groove 1010a to the next positioning groove 1010 a.

In one embodiment, when the positioning member 104 is assembled in the first limiting groove 1000, the positioning post 1041 in the positioning member 104 is partially exposed outside the first limiting groove 1000. Because the first columnar portion 1010 is cylindrical, the accommodating cavity 100 includes a second limiting groove 1002 adapted to the shape of the first columnar portion 1010. And the openings of the first limit groove 1000 are all positioned at the bottom of the second limit groove 1002, and when the tooth 101 is assembled to the handle 10, the front ends of the first columnar portion 1010 of the tooth 101 and the positioning member 104 are inserted into the second limit groove 1002, so that the rotation guide in the rotation process of the handle 10 is realized by assembling the tooth 101 and the positioning member 104 to the first limit groove 1000 and the second limit groove 1002.

In a specific embodiment, the outer side of the toothed ring 103 is composed of a plurality of continuous and first-connected limiting surfaces, that is, the cross section of the outer side wall of the toothed ring 103 is in a regular polygon, and the accommodating cavity 100 includes a third limiting groove 1003 with a side wall adapted to the outer side wall (or a plurality of limiting surfaces) of the toothed ring 103. The second limiting groove 1002 is located at the bottom of the third limiting groove 1003, and the toothed ring 103 is installed in the third limiting groove 1003, so that the toothed ring 103 moves synchronously along with the handle 10 through cooperation of the toothed ring 103 and the third limiting groove 1003, and the toothed ring 103 drives the rotary core 102 to transmit a rotation moment to the lock cylinder of the lock body.

In a specific embodiment, the number of positioning members 104 is preferably 4, that is, the predetermined angle is 90 °. The number of the first limiting grooves 1000 and the number of the positioning grooves 1010a correspond to the number of the positioning members 104, i.e. the number of the first limiting grooves 1000 and the number of the positioning grooves 1010a are 4. In other embodiments, the number of the first limiting grooves 1000 and the number of the positioning grooves 1010a are not limited.

In a specific embodiment, referring to fig. 5 and 6, the handle assembly 1 further includes a screw 105 having a stepped shaft shape, and it is apparent that a nut of the screw 105 functions to prevent the first tooth 1020a of the rotary core 102 from being moved out of the tooth 101. In order to assemble the tooth 101 into the accommodating chamber 1000 of the handle 10 by the screw 105, a first mounting hole 1001 is formed in the chamber wall of the accommodating chamber 1000 along the extending direction of the rotation axis of the handle 10, and the tooth 101 has a second mounting hole 1013 which is fitted to the first mounting hole 1001 and is in a through-type step shape. That is, the handle 101 is fixed to the handle 10 by the screw 105, and the screw 105 passes through the second mounting hole 1013 and is screwed to the first mounting hole 1001, so that the handle 10 is sleeved on the handle 101 (it should be noted that the handle 101 is still during the rotation of the handle 10).

In one embodiment, the handle assembly 1 further includes a spacer 106 that is sleeved on the screw 105 and is used to reduce friction between the handle 10 and the tooth 101, so as to reduce friction between the inner cavity wall of the handle 10 and the tooth 101.

In one embodiment, the second column portion 1011 is located at the front end of the first column portion 1010. The accommodating cavity 100 includes a fourth limiting groove 1004 adapted to the second cylindrical portion 1011, and when the tooth 101 is assembled to the handle 10, the second cylindrical portion 1011 is attached to a groove wall of the fourth limiting groove 1004. More specifically, the second cylindrical portion is substantially cake-shaped in shape.

In a specific embodiment, in connection with fig. 7, the handle assembly 1 further comprises a handle pad 11 mounted on the tooth 101, wherein the handle pad 11 is located between the handle 10 and the door leaf or window sash. That is, the handle grip pad 11 is fitted at the opening of the accommodating chamber 100, and the handle grip 1 closes the accommodating chamber 100 when the handle grip pad 11 is covered on the handle grip 1. The handle pad 11 serves to reduce friction between the handle 10 and the teeth 101 and the door leaf or window sash. The handle pad 11 is still during the rotation of the handle 10. Specifically, the handle pad 11 is provided with a first mounting post 110 and a third mounting hole 111 located beside the first mounting post, and the tooth 101 is provided with a fourth mounting hole 1015 adapted to the first mounting post 110 and a second mounting post 1014 adapted to the third mounting hole 111, so as to realize the fixed connection of the handle 10 and the tooth 101. The tooth 101 of the handle assembly 1 is mounted to the door leaf or window sash by a screw and a second mounting post 1014. It will be apparent that in other embodiments, the handle assembly 1 may also be devoid of the handle grip pad 11.

In particular, the dimension (e.g., diameter or radius) of the second column portion 1011 is greater than the dimension (e.g., diameter or radius) of the first column portion 1010, while the dimension (e.g., width or height) of the second column portion 1011 is less than the dimension (e.g., width or height) of the first column portion 1010.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (10)

1. A handle assembly mounted on a door leaf or window sash; wherein, the handle subassembly is including having the handle of holding chamber, its characterized in that, the handle subassembly still includes:

the wheel tooth comprises a first columnar part, and a movement groove arranged along the axial direction of the wheel tooth is formed in the periphery of the first columnar part;

the rotary core comprises a gear section and a prism section which are coaxially arranged and connected, the periphery of the gear section is provided with a first tooth, and the rotary core is assembled on the tooth in a mode that the gear section is arranged in the motion groove and the prism section penetrates out to the front end of the tooth;

the toothed ring comprises a central through hole and second teeth positioned on the inner side wall of the central through hole, the toothed ring is fixed in a holding cavity of the handle, and the handle is rotationally connected with the teeth in a mode that the first columnar part is positioned in the holding cavity, and the second teeth of the toothed ring are meshed with the first teeth of the rotating core.

2. The handle assembly of claim 1, wherein the handle assembly includes at least one positioning member mounted within the receiving cavity, the positioning member being positioned at an end of the first post of the tooth facing away from the base plate and causing a bump in the handle when the handle is rotated a predetermined angle.

3. The handle assembly according to claim 2, wherein each of the positioning members comprises a ball and a spring, and an end surface of the first columnar portion of the tooth facing the positioning member is provided with a plurality of positioning grooves adapted to the ball, and the positioning grooves are located on the same circumference centering on a rotation axis of the handle;

each positioning component is assembled in the accommodating cavity in a mode that the front end of the ball is pushed by the spring to be embedded into the positioning groove, the ball overcomes the elastic force of the spring in the rotation process of the handle and is separated from the positioning groove, and the spring pushes the front end of the ball to be embedded into the next positioning groove when the ball reaches the next positioning groove.

4. The handle assembly according to claim 3, wherein each of the positioning members further comprises a positioning post, the balls and the springs are installed in the positioning post, and at least a portion of the balls are exposed to an end surface of the positioning post under the urging of the elastic force of the springs;

the holding cavity is provided with a first limit groove which is matched with the positioning column and is arranged along the direction parallel to the rotating shaft of the handle, and the positioning column is assembled in the first limit groove in a way that the front end of the ball is exposed out of the first limit groove.

5. The handle assembly of claim 4, wherein the first cylindrical portion is cylindrical; the accommodating cavity comprises a second limit groove matched with the shape of the first columnar part, the first limit groove is positioned at the bottom of the second limit groove, and when the tooth is assembled to the handle, the front end of the first columnar part of the tooth is inserted into the second limit groove.

6. The handle assembly of claim 5, wherein the outer sidewall of the toothed ring has a regular polygon cross-section; the accommodating cavity comprises a third limit groove with the side wall being matched with the outer side wall of the toothed ring, the second limit groove is located at the bottom of the third limit groove, and the toothed ring is arranged in the third limit groove.

7. The handle assembly of claim 4, wherein the number of positioning members is 4, and adjacent positioning members are each 90 ° apart; the number of the first limit grooves and the number of the positioning grooves are corresponding to the number of the positioning parts.

8. The handle assembly of claim 1, further comprising a screw in the shape of a stepped shaft; the bottom wall of the accommodating cavity is provided with a first mounting hole arranged along the direction of the rotating shaft of the handle, and the tooth is provided with a second mounting hole which is matched with the first mounting hole and is in a through step shape;

the wheel tooth is fixed with the handle through the screw, and the screw penetrates through the second mounting hole and is in threaded connection with the first mounting hole.

9. The handle assembly of claim 1, wherein the tooth further comprises a second cylindrical portion at a front end of the first cylindrical portion, and the second cylindrical portion is cylindrical;

the accommodating cavity comprises a fourth limit groove matched with the second cylindrical part, and when the tooth is assembled to the handle, the second cylindrical part is attached to the side wall of the fourth limit groove.

10. The handle assembly according to any one of claims 1-9, further comprising a handle pad assembled at the opening of the accommodating cavity, wherein the handle pad is provided with a first mounting post and a third mounting hole located beside the first mounting post, and the tooth is provided with a fourth mounting hole matched with the first mounting post and a second mounting post matched with the third mounting hole.