CN219316649U - Handle structure and base-free handle - Google Patents

Abstract

The utility model belongs to the technical field of door and window accessories, and discloses a handle structure and a non-base handle, which comprise a handle, a square shaft, a limiting assembly and a locking assembly, wherein one end of the square shaft is connected with the handle, and the limiting assembly comprises a spring sheet, a plurality of elastic resetting pieces and a plurality of steel balls; the elastic pressing sheet is sleeved on the square shaft; the surface of the handle, which is close to the spring pressing piece, is provided with a plurality of mounting blind holes, the plurality of mounting blind holes are uniformly distributed around the square shaft, and a plurality of elastic resetting pieces are respectively arranged in the plurality of mounting blind holes; the elastic pressing piece is provided with a plurality of clamping holes, the clamping holes correspond to the elastic resetting pieces one by one, one end of the steel ball is abutted to the clamping holes, and the other end of the steel ball is positioned in the mounting blind hole and is abutted to the elastic resetting pieces. Through setting up spacing subassembly on the handle structure for the subassembly of the base of constituteing no base handle obtains subtracting, thereby makes the structure of the base of no base handle become simple, so that assemble.

Description

Handle structure and base-free handle

Technical Field

The utility model belongs to the technical field of door and window accessories, and particularly relates to a handle structure and a base-free handle.

Background

The handle is a device mounted on a door and window sash and having fastening function after opening and closing, and the existing handle is generally divided into a base handle and an unbacked handle, wherein the base handle means that a base part is exposed outside, and the unbacked handle means that the base part is not exposed outside but is positioned in a handle of the handle.

In order to ensure that the handle rotates in place every time, an angle limiting structure is usually arranged in the base in the prior art, however, because the structure of the base-free handle can be limited by the volume, the arrangement of the angle limiting structure in the base of the base-free handle can lead the structure of the base-free handle to be quite complex, thereby causing the trouble of assembling the base of the base-free handle.

Accordingly, the prior art is subject to improvement and development.

Disclosure of Invention

The utility model aims to provide a handle structure and an unbase handle, which can reduce the components of a base forming the unbase handle, so that the structure of the base of the unbase handle is simplified, and the assembly is convenient.

In a first aspect, the utility model provides a handle structure, which comprises a handle, a square shaft, a limiting assembly and a locking assembly, wherein one end of the square shaft is connected with the handle, and the limiting assembly comprises a spring sheet, a plurality of elastic resetting pieces and a plurality of steel balls; the spring sheet is sleeved on the square shaft; the side, close to the spring sheet, of the handle is provided with a plurality of mounting blind holes, the plurality of mounting blind holes are uniformly distributed around the square shaft, and the plurality of elastic reset pieces are respectively arranged in the plurality of mounting blind holes; the elastic pressing piece is provided with a plurality of clamping holes, and the clamping holes correspond to the elastic resetting pieces one by one; one end of the steel ball is abutted against the clamping hole, and the other end of the steel ball is positioned in the mounting blind hole and is abutted against the elastic reset piece.

According to the utility model, the design of the limiting component is arranged on the handle structure, so that the components forming the base of the non-base handle are reduced, and the structure of the base of the non-base handle is simplified, so that the base is convenient to assemble.

Further, a plurality of limiting bayonets for limiting and fixing the spring pressing pieces are uniformly distributed on the edges of the spring pressing pieces.

According to the utility model, the plurality of limit bayonets are uniformly distributed on the edge of the spring sheet, so that the plurality of limit bayonets are mutually matched with the plurality of limit lugs on the base, the spring sheet is limited and fixed, and the spring sheet is prevented from rotating along with the square shaft.

Further, the handle structure further comprises a fixing sleeve connected with the base; the fixed sleeve is sleeved on the square shaft, and an annular clamping groove is formed in the fixed sleeve.

According to the utility model, the square shaft is sleeved with the fixing sleeve with the annular clamping groove, so that the elastic clamp spring of the base can be clamped in the annular clamping groove after the square shaft is inserted into the base, and the handle structure is firmly connected with the base.

Further, an edge of one end of the square shaft parallel to the axis of the square shaft is provided with a first cambered surface, a second cambered surface matched with the first cambered surface is arranged in the fixing sleeve, the first cambered surface coincides with the second cambered surface, and one surface of the fixing sleeve, which is far away from the handle, is abutted to the transition surface on the square shaft.

Further, one surface of the handle, which is close to the spring sheet, is provided with an installation shaft hole, and one end of the square shaft is inserted into the installation shaft hole.

Further, a clamping position is arranged on the side wall of one end of the square shaft, and the clamping position is located in the installation shaft hole.

Further, a cavity is arranged on the handle, and the spring sheet is positioned in the cavity.

In a second aspect, the present utility model provides a non-base handle, including the handle structure described in the first aspect.

Further, the non-base handle further comprises a base connected with the handle structure;

the base comprises a base body, a cover plate and an elastic clamp spring, wherein the cover plate is arranged on the base body, the base body is provided with a through hole and a containing groove communicated with the through hole, the shape of the containing groove is matched with that of the elastic clamp spring, a limiting clamping block is arranged in the containing groove, the elastic clamp spring is positioned in the containing groove, the closed end of the elastic clamp spring is abutted to the outer side wall of a part of the limiting clamping block, so that the elastic clamp spring is connected with the square shaft, and the opening end of the elastic clamp spring can be opened in the containing groove.

Further, the above-mentioned non-base handle further comprises a safety lock assembly; the safety lock assembly comprises a rotating sleeve, a moving pin and a reset elastic piece;

the rotating sleeve is sleeved on the base body and the cover plate and can rotate relative to the base body; the inner side wall of the rotating sleeve is provided with a convex part protruding inwards, and the convex part stretches into a containing position formed between the base body and the cover plate; the movable pin is arranged in the mounting pin hole of the base body, and when the rotating sleeve rotates, the convex part can push the movable pin to enable one end of the movable pin to be exposed out of the mounting pin hole; the reset elastic piece is sleeved on the moving pin, one end of the reset elastic piece is abutted against a first limiting part arranged on the inner side wall of the mounting pin hole, and the other end of the reset elastic piece is abutted against a second limiting part on the moving pin.

Therefore, the handle structure and the non-base handle are characterized in that the limit component is arranged on the handle structure, so that the components forming the base of the non-base handle are reduced, and the structure of the base of the non-base handle is simplified, so that the non-base handle is convenient to assemble.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

Fig. 1 is a schematic structural diagram of a handle structure according to an embodiment of the present utility model.

Fig. 2 is an exploded view of a handle structure according to an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of a handle structure according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of a non-base handle according to an embodiment of the present utility model.

Fig. 5 is a cross-sectional view of a non-base handle according to an embodiment of the present utility model.

Fig. 6 is a schematic front view of a base according to an embodiment of the present utility model.

Fig. 7 is a schematic structural diagram of an elastic snap spring in a receiving groove according to an embodiment of the present utility model.

Fig. 8 is an exploded view of a base according to an embodiment of the present utility model.

Fig. 9 is a schematic view of a back structure of a base according to an embodiment of the present utility model.

Fig. 10 is a cross-sectional view of a base provided in an embodiment of the present utility model.

Description of the reference numerals: 100. a handle; 101. installing a blind hole; 102. mounting a shaft hole; 103. a cavity; 104. an insertion hole; 200. a square shaft; 201. a first cambered surface; 202. a transition surface; 203. clamping; 300. spring pressing sheets; 301. a clamping hole; 302. limiting bayonet; 400. an elastic reset piece; 500. steel balls; 600. a fixed sleeve; 601. an annular clamping groove; 602. a second cambered surface; 1. a base body; 11. mounting pin holes; 111. a first limit part; 12. a guide groove; 13. a first extension; 14. a through hole; 141. a positioning groove; 15. a receiving groove; 151. a limit clamping block; 16. a quick-release port; 17. positioning holes; 18. a mounting column; 181. a mounting hole; 19. mounting through holes; 110. a limit bump; 2. a cover plate; 21. a second extension; 22. a limiting block; 23. a positioning pin; 3. an elastic clamp spring; 4. a rotating sleeve; 41. a convex portion; 42. a boss; 5. a moving pin; 51. a second limit part; 6. a return elastic member; 7. rong Zhiwei; 8. a shaft sleeve; 81. limiting arc blocks; 82. and positioning the protruding blocks.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

In a first aspect, as shown in fig. 1, 2 and 3, a handle structure of the present utility model includes a handle 100, a square shaft 200 and a limiting component. One end of the square shaft 200 is connected to the handle 100. The limiting assembly comprises a spring plate 300, a plurality of elastic resetting pieces 400 and a plurality of steel balls 500. The elastic pressing sheet 300 is sleeved on the square shaft 200. The handle 100 has a plurality of blind installation holes 101 near the spring 300, and a plurality of blind installation holes 101 are evenly distributed around the square shaft 200, and a plurality of elastic resetting members 400 are respectively arranged in a plurality of blind installation holes 101. The elastic pressing piece 300 is provided with a plurality of clamping holes 301, and the plurality of clamping holes 301 are in one-to-one correspondence with the plurality of elastic resetting pieces 400. One end of the steel ball 500 is abutted against the clamping hole 301, and the other end of the steel ball 500 is positioned in the mounting blind hole 101 and is abutted against the elastic reset piece 400.

In a specific application, after the handle structure is connected with the base, the handle 100 is rotated, the handle 100 drives the square shaft 200, the elastic reset piece 400 and the steel ball 500 to rotate, the steel ball 500 is separated from the clamping hole 301 under the action of torsion force and rolls along the surface of the spring sheet 300, which is close to the handle 100, at this time, the elastic reset piece 400 is compressed, and when the steel ball 500 rolls along the surface of the spring sheet 300, which is close to the handle 100, to correspond to the other clamping hole 301, one end of the steel ball 500 is abutted against the other clamping hole 301 under the action of the elasticity of the elastic reset piece 400, so that the limiting of the rotation angle is realized.

Through this technical scheme for the subassembly of the base of constituteing the no base handle obtains subtracting, thereby makes the structure of the base of no base handle become simple, in order to assemble.

Specifically, the number of the elastic restoring members 400 is four, and an included angle of 90 degrees is formed between two adjacent elastic restoring members 400, which of course, the number of the elastic restoring members 400 may be adaptively increased or decreased according to the actual requirement, and correspondingly, the included angle between two adjacent elastic restoring members 400 may be correspondingly adjusted according to the actual requirement, which is just an embodiment of the present utility model, but not limited thereto.

In some preferred embodiments, a plurality of limiting bayonets 302 for limiting and fixing the elastic pressing piece 300 are uniformly arranged at the edge of the elastic pressing piece 300. In a specific application, a plurality of limit bayonets 302 are uniformly distributed on the edge of the snap 300, so that the limit bayonets 302 are mutually matched with the limit lugs 110 on the base to limit and fix the snap 300, and the snap 300 is prevented from rotating along with the square shaft 200.

In some preferred embodiments, the handle structure further includes a securing sleeve 600 for connection to the base. The fixing sleeve 600 is sleeved on the square shaft 200, the elastic pressing sheet 300 is sleeved on the fixing sleeve 600, and the fixing sleeve 600 is provided with an annular clamping groove 601. In a specific application, the fixing sleeve 600 with the annular clamping groove 601 is sleeved on the square shaft 200, so that after the square shaft 200 is inserted into the base, the elastic clamp spring 3 of the base can be clamped in the annular clamping groove 601, and the handle structure is firmly connected with the base.

In some preferred embodiments, the edge of one end of the square shaft 200 parallel to the axis of the square shaft 200 has a first arc surface 201, the fixing sleeve 600 has a second arc surface 602 adapted to the first arc surface 201, the first arc surface 201 coincides with the second arc surface 602, and the surface of the fixing sleeve 600 away from the handle 100 abuts against the transition surface 202 on the square shaft 200. In a specific application, the first cambered surface 201 is processed on the edge of one end of the square shaft 200 parallel to the axis of the square shaft 200, so that the transition surface 202 is formed on the square shaft 200, and after one end of the square shaft 200 is connected with the handle 100, the transition surface 202 is matched with one surface of the handle 100, which is close to the snap piece 300, so that the limit of the fixing sleeve 600 in the axial direction is realized, and the fixing sleeve 600 is prevented from moving along the axial direction.

In some preferred embodiments, the handle 100 has a mounting shaft hole 102 on a surface thereof adjacent to the snap tab 300, and one end of the square shaft 200 is inserted into the mounting shaft hole 102. In a specific application, one end of the square shaft 200 is in interference fit with the mounting shaft hole 102, so as to ensure that the square shaft 200 is firmly connected with the handle 100.

In some preferred embodiments, a side wall of one end of the square shaft 200 is provided with a locking position 203, and the locking position 203 is located in the installation shaft hole 102. In a specific application, the side wall of one end of the square shaft 200 is provided with the clamping position 203, so that after the one end of the square shaft 200 is inserted into the installation shaft hole 102, the square shaft 200 and the handle 100 can be firmly connected.

In some preferred embodiments, the handle 100 is provided with a cavity 103, and the snap tab 300 is located in the cavity 103. In a specific application, the cavity 103 is arranged on the handle 100, so that after the handle structure is connected with the base, the base is positioned in the cavity 103, and the aesthetic degree of the handle without the base is improved.

In a second aspect, the present utility model provides a non-base handle, including the handle structure of the first aspect.

In some preferred embodiments, the above-described non-base handle further comprises a base coupled to the handle structure, as shown in fig. 4, 5, 6 and 7. Specifically, the base includes base body 1, apron 2 and elasticity jump ring 3, apron 2 sets up on base body 1, base body 1 has through-hole 14 and the storage tank 15 with through-hole 14 intercommunication, the shape looks adaptation of storage tank 15 and elasticity jump ring 3 is equipped with spacing fixture block 151 in the storage tank 15, elasticity jump ring 3 is located storage tank 15, the partial lateral wall of the spacing fixture block 151 of the closed end butt of elasticity jump ring 3 to make elasticity jump ring 3 and square shaft 200 connection, the open end of elasticity jump ring 3 can be opened in storage tank 15.

In a specific application, when the square shaft 200 passes through the through hole 14, the elastic clamp spring 3 is opened under the action of the square shaft 200 (i.e. the opening end of the elastic clamp spring 3 is opened in the accommodating groove 15), and after the square shaft 200 is inserted in place, the elastic clamp spring 3 is clamped in the annular clamping groove 601, so that the connection between the base and the handle structure is realized.

As shown in fig. 7, in some preferred embodiments, the base body 1 has a quick-release opening 16 in communication with the accommodating groove 15, and the quick-release opening 16 faces the open end of the elastic clip spring 3. In specific application, through setting up quick detach mouth 16 in the position of the open end towards elasticity jump ring 3 on base body 1 for when being connected or dismantle base and handle structure, can utilize a columnar instrument to stretch into holding tank 15 by quick detach mouth 16 and strut the open end of elasticity jump ring 3, be convenient for carry out the quick connect with square shaft 200 and fix or dismantle the separation fast with the base.

As shown in fig. 8, in some preferred embodiments, a stopper 22 is disposed on a surface of the cover 2 near the base body 1, and the stopper 22 abuts against the elastic clip spring 3. In the specific application, through set up stopper 22 in the one side that apron 2 is close to base body 1 for stopper 22 cooperates with storage tank 15 and realizes the spacing to elasticity jump ring 3 in the axial of through hole 14, avoids handle structure and base connection back to appear not hard up condition.

As shown in fig. 7 and 8, in some preferred embodiments, the base of the above-mentioned base-free handle further includes a shaft sleeve 8, the shaft sleeve 8 is located in the through hole 14, one end of the shaft sleeve 8, which is close to the accommodating groove 15, is provided with a limiting arc block 81, the limiting arc block 81 is located in the accommodating groove 15, and two ends of the limiting arc block 81 respectively abut against two opposite inner side walls of the elastic snap spring 3. In a specific application, the limiting arc blocks 81 on the shaft sleeve 8 are matched with the side wall of the accommodating groove 15 to further limit the elastic clamp spring 3 in the radial direction of the through hole 14, so that the elastic clamp spring 3 is not easy to shift, and the square shaft 200 can be accurately clamped in the annular clamping groove 601 when passing through the through hole 14, so that firm connection is ensured; in addition, the sleeve 8 can guide the square shaft 200 when the square shaft 200 passes through the through hole 14, so as to ensure that the square shaft 200 is accurately inserted into the base.

In some preferred embodiments, as shown in fig. 8, the inner side wall of the through hole 14 is provided with a positioning groove 141, the outer side wall of the sleeve 8 is provided with a positioning protrusion 82, and the positioning protrusion 82 is located in the positioning groove 141. In a specific application, the positioning groove 141 and the positioning projection 82 with a shape matching with the positioning groove 141 are respectively disposed on the inner sidewall of the through hole 14 and the outer sidewall of the shaft sleeve 8, so that the shaft sleeve 8 can be quickly mounted at a predetermined position in the through hole 14, and the assembly speed is improved.

In some preferred embodiments, as shown in fig. 8, the surface of the base body 1 near the cover plate 2 is provided with a positioning hole 17, and the surface of the cover plate 2 near the base body 1 is provided with a positioning pin 23, where the positioning pin 23 is located in the positioning hole 17. In a specific application, the positioning holes 17 and the positioning pins 23 matched with the shapes of the positioning holes 17 are respectively arranged on one surface of the base body 1 close to the cover plate 2 and one surface of the cover plate 2 close to the base body 1, so that the cover plate 2 can be conveniently and rapidly installed at the preset position of the base body 1. Specifically, the number of the positioning holes 17 and the positioning pins 23 is two, and the two positioning holes 17 and the two positioning pins 23 are respectively disposed at two sides of the through hole 14.

As shown in fig. 6 and 8, in some preferred embodiments, a mounting post 18 is provided on a surface of the base body 1 adjacent to the cover plate 2, and the mounting post 18 is exposed from the cover plate 2. In a specific application, the mounting column 18 is arranged on one surface, close to the cover plate 2, of the base body 1, and the mounting column 18 is exposed out of the cover plate 2, so that when the base is mounted on a door or window, the mounting column 18 exposed out of the cover plate 2 can be inserted into a preset hole site on the door or window, and the base is rapidly mounted at a preset position on the door or window. Specifically, the mounting post 18 is provided with a mounting hole 181, and the mounting hole 181 communicates with a mounting through hole 19 on the base body 1. After the mounting post 18 exposed out of the cover plate 2 is inserted into a preset hole on the door and window, the base body 1 is mounted on the door and window by sequentially penetrating the mounting through hole 19 and the mounting hole 181 by using bolts or screws.

In some preferred embodiments, as shown in fig. 9, a limiting bump 110 is disposed on a surface of the base body 1 away from the cover 2. In a specific application, the limiting lug 110 is arranged on one surface, far away from the cover plate 2, of the base body 1, so that after the base is connected with the handle structure, the limiting lug 110 can limit the snap piece 300 sleeved on the square shaft 200, and when the handle 100 is prevented from rotating, the snap piece 300 rotates together. Specifically, the number of the limiting protrusions 110 is multiple, and the plurality of limiting protrusions 110 are uniformly distributed on one surface of the base body 1 far away from the cover plate 2, so as to better limit the snap tabs 300 sleeved on the square shaft 200.

As shown in fig. 8 and 10, in some preferred embodiments, the above-described non-base handle further comprises a safety lock assembly. The safety lock assembly comprises a rotating sleeve 4, a moving pin 5 and a reset elastic piece 6. The rotating sleeve 4 is sleeved on the base body 1 and the cover plate 2 and can rotate relative to the base body 1. The inner side wall of the rotating sleeve 4 is provided with an inwardly protruding part 41, and the protruding part 41 protrudes into a containing position 7 formed between the base body 1 and the cover plate 2. The moving pin 5 is disposed in the mounting pin hole 11 of the base body 1, and when the rotation sleeve 4 rotates, the protruding portion 41 can push the moving pin 5 so that one end thereof is exposed to the mounting pin hole 11. The reset elastic member 6 is sleeved on the moving pin 5, one end of the reset elastic member is abutted against a first limiting portion 111 arranged on the inner side wall of the mounting pin hole 11, and the other end of the reset elastic member is abutted against a second limiting portion 51 on the moving pin 5.

In a specific application, an insertion hole 104 is formed on one surface of the handle 100, which is close to the elastic pressing piece 300, after the handle 100 rotates in place, the rotating sleeve 4 rotates, the rotating sleeve 4 drives the protruding portion 41 to rotate, along with the continuous rotation of the protruding portion 41, the protruding portion 41 pushes the moving pin 5 to enable one end of the moving pin 5 to extend into the insertion hole 104, the handle 100 is locked, the handle 100 cannot rotate, at the moment, the reset elastic piece 6 is compressed, when the locking of the handle 100 needs to be released, the rotating sleeve 4 rotates reversely, the protruding portion 41 does not push the moving pin 5 any more, the compressed reset elastic piece 6 needs to restore an uncompressed state, and the elastic force of the reset elastic piece 6 drives the moving pin 5 to move away from the direction of the insertion hole 104, so that one end of the moving pin 5 is separated from the insertion hole 104, and the unlocking of the handle 100 is realized.

As shown in fig. 7 and 8, in some preferred embodiments, a guide groove 12 is provided in a region of the upper surface of the base body 1 corresponding to the accommodation site 7, and one end of the protrusion 41 protrudes into the guide groove 12. In a specific application, the protruding portion 41 can be guided by providing the guide groove 12 in the region corresponding to the accommodating position 7 on the upper surface of the base body 1, so that the protruding portion 41 can precisely push the moving pin 5 to move when the rotating sleeve 4 rotates.

As shown in fig. 10, in some preferred embodiments, the edge of the base body 1 has a first extension portion 13 extending outward, the edge of the cover plate 2 has a second extension portion 21 extending outward, and the inner sidewall of the rotating sleeve 4 is provided with a boss 42 protruding inward, and the boss 42 is located between the first extension portion 13 and the second extension portion 21. In a specific application, the first extending portion 13 and the second extending portion 21 extending outwards are respectively arranged at the edge of the base body 1 and the edge of the cover plate 2, so that the first extending portion 13 and the second extending portion 21 not only can limit the boss 42 protruding inwards and arranged on the inner side wall of the rotating sleeve 4, but also can enable the base body 1, the cover plate 2 and the rotating sleeve 4 to be coaxial, and therefore the protruding portion 41 can accurately push the moving pin 5 to move when the rotating sleeve 4 is rotated.

In summary, according to the handle structure and the non-base handle provided by the utility model, the design of arranging the limiting component on the handle structure enables the components forming the base of the non-base handle to be reduced, so that the structure of the base of the non-base handle is simplified, and the assembly is facilitated.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims (10)

1. The handle structure comprises a handle and a square shaft, wherein one end of the square shaft is connected with the handle; the spring sheet is sleeved on the square shaft; the side, close to the spring sheet, of the handle is provided with a plurality of mounting blind holes, the plurality of mounting blind holes are uniformly distributed around the square shaft, and the plurality of elastic reset pieces are respectively arranged in the plurality of mounting blind holes; the elastic pressing piece is provided with a plurality of clamping holes, and the clamping holes correspond to the elastic resetting pieces one by one; one end of the steel ball is abutted against the clamping hole, and the other end of the steel ball is positioned in the mounting blind hole and is abutted against the elastic reset piece.

2. The handle structure according to claim 1, wherein a plurality of limiting bayonets for limiting and fixing the snap pieces are uniformly distributed on the edges of the snap pieces.

3. The handle structure of claim 1, further comprising a securing sleeve for connection to the base; the fixed sleeve is sleeved on the square shaft, and an annular clamping groove is formed in the fixed sleeve.

4. The handle structure according to claim 3, wherein an edge of one end of the square shaft parallel to the axis of the square shaft is provided with a first cambered surface, a second cambered surface matched with the first cambered surface is arranged in the fixing sleeve, the first cambered surface coincides with the second cambered surface, and one surface of the fixing sleeve away from the handle is abutted against the transition surface on the square shaft.

5. The handle structure according to claim 1, wherein a mounting shaft hole is formed in a surface of the handle, which is close to the spring sheet, and one end of the square shaft is inserted into the mounting shaft hole.

6. The handle structure according to claim 5, wherein a side wall of one end of the square shaft is provided with a detent, and the detent is located in the mounting shaft hole.

7. The handle structure according to claim 1, wherein a cavity is provided on the handle, and the snap tab is located in the cavity.

8. An unbase handle comprising the handle structure according to any one of claims 1-7.

9. The non-base handle of claim 8 further comprising a base coupled to the handle structure;

the base comprises a base body, a cover plate and an elastic clamp spring, wherein the cover plate is arranged on the base body, the base body is provided with a through hole and a containing groove communicated with the through hole, the shape of the containing groove is matched with that of the elastic clamp spring, a limiting clamping block is arranged in the containing groove, the elastic clamp spring is positioned in the containing groove, the closed end of the elastic clamp spring is abutted to the outer side wall of a part of the limiting clamping block, so that the elastic clamp spring is connected with the square shaft, and the opening end of the elastic clamp spring can be opened in the containing groove.

10. The base-less handle of claim 9 further comprising a safety lock assembly; the safety lock assembly comprises a rotating sleeve, a moving pin and a reset elastic piece;

the rotating sleeve is sleeved on the base body and the cover plate and can rotate relative to the base body; the inner side wall of the rotating sleeve is provided with a convex part protruding inwards, and the convex part stretches into a containing position formed between the base body and the cover plate; the movable pin is arranged in the mounting pin hole of the base body, and when the rotating sleeve rotates, the convex part can push the movable pin to enable one end of the movable pin to be exposed out of the mounting pin hole; the reset elastic piece is sleeved on the moving pin, one end of the reset elastic piece is abutted against a first limiting part arranged on the inner side wall of the mounting pin hole, and the other end of the reset elastic piece is abutted against a second limiting part on the moving pin.

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