CN221097181U

CN221097181U - Rotating shaft structure

Info

Publication number: CN221097181U
Application number: CN202323307295.0U
Authority: CN
Inventors: 张瑞鸿; 邱宥腾; 严克敦
Original assignee: Jarllytec Co Ltd
Current assignee: Jarllytec Co Ltd
Priority date: 2023-12-05
Filing date: 2023-12-05
Publication date: 2024-06-07
Anticipated expiration: 2033-12-05

Abstract

The utility model relates to a rotating shaft structure, which comprises a first joint piece, wherein one end of the first joint piece is connected with a pivot; a second clamping part of the first rotating piece is connected with a first clamping part of the first joint piece; one end of a first concave-convex wheel is provided with a first elastic piece, and a second concave-convex part at the other end of the first concave-convex wheel is in butt joint with a first concave-convex part of a first rotating piece, so that the first concave-convex wheel moves axially back and forth; a second clamping part of the cladding piece is connected with a first clamping part of the first joint piece, so that the cladding piece and the first joint piece synchronously rotate; one end of a second joint piece is fixedly sleeved with the pivot; one end of the second rotating member is provided with a second elastic member, and a protruding part of the second rotating member passes through a limiting hole of the second joint member to butt against a third concave-convex part of the cladding member, so that the second rotating member moves back and forth axially.

Description

Rotating shaft structure

Technical Field

The present utility model relates to a hinge structure, and more particularly to a hinge structure of a foldable electronic device.

Background

The display and the base of a conventional foldable electronic device, such as a notebook computer, are connected to the side of the display and the base by a single-axis or double-axis hinge, respectively, so as to form a pivot arrangement, thereby enabling the display to be turned over and lifted or closed relative to the base, and adjusting the pitching angle of the display relative to the base.

As shown in the patent of CN202926868U, the hinge is a single-axis hinge, and mainly comprises a first bracket, a second bracket and a pivot, wherein two sides of the pivot are respectively sleeved with a first cam structure, a second cam structure and at least one elastic body, and free ends at two sides of the pivot are respectively combined with a tightening piece; the first cam structure comprises a first rotating piece combined with the movable frame piece and a first fixing piece capable of being linked with the pivot, and a contact surface of the first rotating piece adjacent to the first fixing piece is provided with a first concave part and a first convex part which are in butt joint; the second cam structure comprises a second rotating piece combined with the movable frame piece and a second fixing piece capable of being linked with the pivot, the contact surface of the second fixing piece and the second rotating piece is respectively provided with a second inner convex block and a third inner convex block, and the third inner convex block and the third outer convex block are positioned in a preset angle range on the moving path of the second inner convex block and the second outer convex block; therefore, when the first rotating piece and the second rotating piece rotate relative to the first fixing piece and the second fixing piece, the first rotating piece and the first fixing piece provide automatic locking of the hinge device, and when the second inner convex block and the second outer convex block of the second fixing piece and the second rotating piece are overlapped with the third inner convex block and the third outer convex block, the distance between the second rotating piece and the second fixing piece is increased, so that the second fixing piece laterally extrudes the elastomer on the same side, and the friction torsion of the hinge device is increased.

The pivot device mainly uses the simultaneous action of the first cam structure and the second cam structure with the same components and is matched with at least one elastomer, so that friction torsion can be generated when the first bracket and the second bracket relatively rotate, and after a certain angle of relative rotation, the opening and closing angle of the second bracket is limited by the mutual stop of the blocking tenon and the limiting tenon. However, when the opening and closing angle of the bracket is fixed and a larger opening angle is required, the user is inconvenient to use due to the lack of elasticity.

Disclosure of Invention

In view of this, the inventors have made many years of experience and continued research and development improvements in order to provide a structure different from the prior art and to improve the above-described drawbacks.

The utility model provides a rotating shaft structure, which can solve the problem that after the opening and closing angle of a bracket of the conventional pivot device is fixed, a user can not conveniently use the bracket because of lacking an elastic opening angle, and can rotate and continue to repeatedly use the bracket by connecting one end of a first joint part with a first rotating part and a concave-convex wheel and connecting two ends of a second joint part with a cladding part and a second rotating part respectively.

In order to achieve the above-mentioned object, the present utility model provides a rotating shaft structure mainly comprising a first engaging member, a first rotating member, a first cam, a covering member, a second engaging member and a second rotating member. One end of the first joint piece is connected with a pivot in a relative rotation mode, and the first joint piece is provided with a first clamping part and a first clamping part; the first rotating piece is connected with the pivot in a relative rotation mode, one end of the first rotating piece is provided with a second clamping part, and the second clamping part is connected with the first clamping part and is used for enabling the first rotating piece and the first joint piece to synchronously rotate; the other end of the first rotating piece is provided with a first concave-convex part; the first concave-convex wheel is connected with the pivot in a synchronous rotation mode, one end of the first concave-convex wheel is provided with a first elastic piece, the other end of the first concave-convex wheel is provided with a second concave-convex part, and the second concave-convex part is in butt joint with the first concave-convex part and is used for enabling the first concave-convex wheel to axially move when rotating relative to the first rotating piece; the cladding piece is connected with the pivot in a relative rotation mode, one end of the cladding piece is provided with a second clamping part, and the second clamping part is connected with the first clamping part and is used for enabling the cladding piece and the first joint piece to synchronously rotate; the other end of the cladding piece is provided with a third concave-convex part; one end of the second joint piece is fixedly sleeved with the pivot and arranged at the other end of the cladding piece, and the one end of the second joint piece is provided with a limiting hole; the second rotating piece is sleeved with the pivot and arranged at one end of the second connecting piece, one end of the second rotating piece is provided with a second elastic piece, the other end of the second rotating piece is provided with a protruding part, and one end of the protruding part penetrates through the limiting hole to butt against the third concave-convex part and is used for enabling the cladding piece to axially move when rotating to an angle relative to the second rotating piece.

When the hinge is implemented, one end of the hinge is provided with a first cylindrical part and a first positioning rod part which extend axially, the other end of the hinge is provided with a second cylindrical part and a second positioning rod part which extend axially, the one end of the first joint piece is connected with the first cylindrical part in a relative rotation mode, the first rotation piece is sleeved with the first positioning rod part in a relative rotation mode, the first concave-convex wheel is sleeved with the first positioning rod part in a synchronous rotation mode, and the cladding piece is sleeved with the second cylindrical part in a relative rotation mode.

When the cam is in implementation, the second rotating piece is sleeved with the second positioning rod part, the second rotating piece comprises a cam piece and a positioning piece, a first limiting part is arranged on one end face of the cam piece, and a protruding part is arranged on the other end face of the cam piece; the locating piece is sleeved with the second locating rod part in a synchronous rotation mode, one end of the locating piece is provided with a second elastic piece, the locating piece is provided with a second limiting part, and the second limiting part is connected with the first limiting part and is used for enabling the locating piece and the cam piece to rotate synchronously.

When in implementation, the middle section of the pivot is provided with an outer ring part, and the two axial ends of the outer ring part are respectively provided with a first cylindrical part and a second cylindrical part.

When the utility model is implemented, the utility model further comprises a friction piece which is sleeved with the first positioning rod part in a synchronous rotation mode, and the friction piece is positioned between one end of the first joint piece and the first rotation piece.

When the first concave-convex part of the first rotating piece comprises a first arc-shaped concave part and a second arc-shaped concave part, the second concave-convex part of the first concave cam comprises a first arc-shaped convex part and a second arc-shaped convex part, the first arc-shaped convex part is in butt joint with the first arc-shaped concave part, and the second arc-shaped convex part is in butt joint with the second arc-shaped concave part.

When the third concave-convex part of the cladding piece comprises an arc-shaped plane part and an arc-shaped convex part, and the two ends of the arc-shaped plane part gradually rise to form the arc-shaped convex part.

The rotating shaft structure provided by the utility model can also comprise a first joint piece, a first rotating piece, a first concave-convex wheel, a connecting piece, a cladding piece, a second joint piece and a second rotating piece. One end of the first joint piece is connected with a pivot in a relative rotation mode, and the first joint piece is provided with a first clamping part; the first rotating piece is connected with the pivot in a relative rotation mode, one end of the first rotating piece is provided with a second clamping part, and the second clamping part is connected with the first clamping part and is used for enabling the first rotating piece and the first joint piece to synchronously rotate; the other end of the first rotating piece is provided with a first concave-convex part; the first concave-convex wheel is connected with the pivot in a synchronous rotation mode, one end of the first concave-convex wheel is provided with a first elastic piece, the other end of the first concave-convex wheel is provided with a second concave-convex part, and the second concave-convex part is in butt joint with the first concave-convex part and is used for enabling the first concave-convex wheel to axially move when rotating relative to the first rotating piece; one end of the connecting piece is combined with the one end of the first connecting piece, and the other end of the connecting piece is provided with a third clamping part; the cladding piece is connected with the pivot in a relative rotation mode, one end of the cladding piece is provided with a fourth clamping part, and the fourth clamping part is connected with the third clamping part and is used for enabling the cladding piece and the first joint piece to synchronously rotate; the other end of the cladding piece is provided with a third concave-convex part; one end of the second joint piece is fixedly sleeved with the pivot and arranged at the other end of the cladding piece, and the one end of the second joint piece is provided with a limiting hole; the second rotating piece is sleeved with the pivot and is arranged at one end of the second joint piece, one end of the second rotating piece is provided with a second elastic piece, the other end of the second rotating piece is provided with a protruding part, and one end of the protruding part penetrates through the limiting hole to butt-joint the third concave-convex part and is used for enabling the cladding piece to axially move when rotating to an angle relative to the second rotating piece.

The present utility model will be described in more detail below to facilitate a more thorough understanding of the present utility model.

Drawings

Fig. 1 is an exploded view of the elements of a first embodiment of the present utility model.

Fig. 2 is a schematic perspective view of the first rotating member and the first concave-convex wheel according to the present utility model.

Fig. 3 is an exploded view of a portion of the elements of a first embodiment of the present utility model.

Fig. 4 is a schematic perspective view of a first embodiment of the present utility model.

Fig. 5 is a section A-A of fig. 4.

Fig. 6 is a schematic view illustrating a use state of the first embodiment of the present utility model entering the first stage rotation.

Fig. 7 is a schematic cross-sectional view of a first embodiment of the present utility model rotated into a first stage.

FIG. 8 is a schematic diagram illustrating the first embodiment of the present utility model entering the second stage rotation.

FIG. 9 is a schematic cross-sectional view of a first embodiment of the present utility model entering a second stage rotation.

Fig. 10 is an exploded view of the elements of a second embodiment of the present utility model.

Reference numerals illustrate:

1 rotating shaft structure

2 Pivot shaft

21 Outer ring portion

22 First cylindrical portion

23 First positioning rod

231 First parallel surface

24 First cap

25 Second cylindrical portion

251 Spiral groove

26 Second positioning rod part

261 Second parallel plane

27 Second cap

3 First joint member

31 First joint part

32 First bending part

321 Pivot hole

322 First clamping part

323 First engaging portion

4 First rotating member

41 Second clamping part

42 First arc recess

43 Second arcuate recess

44 First concave-convex portion

45 Friction piece

5 First concave-convex wheel

51 Axial gap

52 First arc-shaped convex part

53 Second arcuate projection

54, Second concave-convex portion

55 First elastic member

6 Coating part

61 Elongated sleeve

62 Second engaging portion

63 Arc plane part

64 Arc-shaped protruding part

65 Third concave-convex portion

66 Fourth engaging portion

7 Second joint member

71 Second joint part

72 Second bending part

721 Positioning hole

722 Spacing hole

8 Second rotating member

81 Cam member

811 First limit portion

812, Protrusion

82 Positioning piece

821 Second limit part

83 Second elastic member

9 Connecting piece

91, A third engaging portion.

Detailed Description

Referring to fig. 1 to 5, a first embodiment of a rotary shaft structure 1 according to the present utility model mainly includes a first engaging member 3, a first rotating member 4, a first cam 5, a covering member 6, a second engaging member 7 and a second rotating member 8 penetrating a pivot shaft 2. The middle section of the pivot 2 is provided with an outer ring part 21, the outer ring part 24 is an annular plate with the outer periphery of the pivot 2 protruding radially, one end of the outer ring part 21 is provided with a first cylindrical part 22 and a first positioning rod part 23, and the first cylindrical part 22 and the first positioning rod part 23 axially extend in a direction far away from one end of the outer ring part 21 and have a shaft diameter size which is reduced in stages; the first positioning rod 23 is a non-cylinder with two first parallel surfaces 231, and the free end of the first positioning rod 23 is provided with external threads for locking a first cap 24; the other end of the outer ring part 21 is provided with a second cylindrical part 25 and a second positioning rod part 26, and the second cylindrical part 25 and the second positioning rod part 26 axially extend in a direction away from the other end of the outer ring part 21 and have a shaft diameter dimension which is reduced in stages; the second cylindrical portion 25 is a cylinder, and the outer periphery of the second cylindrical portion 25 is provided with spiral grooves 251 which axially surround to guide lubricating oil, and when the lubricating oil is applied, the number of the spiral grooves 251 is at least one; the second positioning rod portion 26 is a non-cylindrical body with two second parallel surfaces 261, and the two second parallel surfaces 261 and the two first parallel surfaces 231 have different rotation angles; the free end of the second locating stem 26 is provided with external threads for locking a second cap 27.

The first joint member 3 comprises a first joint portion 31 and a first bending portion 32, wherein the first joint portion 31 is a flat plate for locking and connecting with a machine body such as a screen; the first bending part 32 is another long flat plate with one end of the first joint part 31 vertically bent, and the plate surface of the first bending part 32 is provided with a pivot hole 321, so that one end of the first joint part 3 is connected with the first cylindrical part 22 in a relative rotation manner; a square groove serving as a first engaging portion 322 and a curved groove serving as a first engaging portion 323 are arranged above the pivot hole 321 at intervals.

The first rotating member 4 is a cam, the first rotating member 4 is connected with the first positioning rod portion 23 in a relative rotating manner, one end edge of the first rotating member 4 is provided with an axially extending square protruding block, the square protruding block is used as a second clamping portion 41, and the second clamping portion 41 is clamped and connected with the first clamping portion 322, so that the first rotating member 4 and the first connecting member 3 synchronously rotate; the other end of the first rotating member 4 has a first arc-shaped recess 42 and a second arc-shaped recess 43 which are symmetrical, and the first arc-shaped recess 42 and the second arc-shaped recess 43 are combined to form a first concave-convex portion 44. A friction ring is arranged between the first rotating member 4 and the first bending portion 32, one end face of the friction ring is provided with a friction surface, and the friction ring is used as a friction member 45; the friction member 45 is sleeved with the first positioning rod portion 23 in a synchronous rotation manner.

The first cam 5 is an annular wheel with an axial gap 51, and the first cam 5 is sleeved with the first positioning rod portion 23 of the pivot 2, so that the first cam 5 and the pivot 2 synchronously rotate. Two symmetrical trapezoid blocks are arranged on one end face of the first concave-convex wheel 5, the two trapezoid blocks are respectively used as a first arc convex part 52 and a second arc convex part 53, and the first arc convex part 52 and the second arc convex part 53 are combined to form a second concave-convex part 54; the other end of the first cam 5 has a plurality of elastic pieces, and the plurality of elastic pieces are coaxially positioned on the first positioning rod portion 23, and in practice, the plurality of elastic pieces serve as a first elastic member 55. After the first cap 24 is locked to the first positioning rod 23, the first elastic member 55 is elastically deformed to press the first concave-convex wheel 5, and the first concave-convex wheel 5 is pressed against the first rotating member 4.

The cover 6 has an elongate sleeve 61, the elongate sleeve 61 being in socket engagement with the second cylindrical portion 25, whereby the cover 6 is connected to the pivot 2 in a relatively rotatable manner. One end of the elongated sleeve 61 radially protrudes by an L-shaped block as a second engaging portion 62; one end of the second engaging portion 62 is engaged with the first engaging portion 323, so that the covering member 6 and the first engaging member 3 are rotated synchronously; the other end surface of the elongated sleeve 61 has an arc-shaped plane portion 63 and an arc-shaped protruding portion 64, and two ends of the arc-shaped plane portion 63 rise gradually to form the arc-shaped protruding portion 64, and when in use, the arc-shaped plane portion 63 and the arc-shaped protruding portion 64 are combined to form a third concave-convex portion 65.

The second joint member 7 includes a second joint portion 71 and a second bending portion 72, where the second joint portion 71 is a flat plate for locking and connecting with another machine body such as a base or a screen; the second bending portion 72 is another flat plate with one end of the second joint portion 71 vertically bent, and a positioning hole 721 is formed on the plate surface of the second bending portion 72, so that one end of the second joint member 7 is fixedly sleeved with the second positioning rod portion 26 in a synchronous rotation manner; one side of the positioning hole 721 is provided with an arc-shaped limiting hole 722 at intervals.

The second rotating member 8 is sleeved with the second positioning rod portion 26 of the pivot 2, and the second rotating member 8 includes a cam member 81 and a positioning member 82 coaxially connected in series, and one end surface of the cam member 81 has two radially symmetrical protruding blocks serving as a first limiting portion 811; the other end face of the cam member 81 is provided with a protruding portion 812, one end of the protruding portion 812 passes through the limiting hole 722 of the second bending portion 72 and is abutted against the third concave-convex portion 65 pressing the other end face of the covering member 6, so that the protruding portion 812 is limited in the limiting hole 722 in a back and forth movement manner when the covering member 6 rotates; the positioning member 82 is an annular plate, the periphery of the positioning member 82 has two radially symmetrical notches, the two notches are used as a second limiting portion 821, and the second limiting portion 821 is connected with the first limiting portion 811, so that the positioning member 82 and the cam member 81 rotate synchronously; one end of the positioning member 82 has a plurality of elastic pieces coaxially positioned on the second positioning rod portion 26, and in operation, the plurality of elastic pieces serve as a second elastic member 83. After the second cap 27 is locked to the second positioning rod 26, the second elastic member 83 is elastically deformed to press the second rotating member 8, and the protruding portion 812 is tightly pressed against the third concave-convex portion 65 on the other end surface of the covering member 6.

Therefore, when applied to a conventional notebook computer or a dual-screen notebook computer and other folding electronic devices, the two bodies of the folding electronic device can be mutually closed to form a covered state, and the first arc-shaped convex part 52 and the second arc-shaped convex part 53 are respectively accommodated and butted in the first arc-shaped concave part 42 and the second arc-shaped concave part 43. As shown in fig. 1, 2 and fig. 6 and 7, when a body (for example, from 0 degrees to 120 degrees) connected with the first joint member 3 is rotated and lifted, the second concave-convex portion 54 relatively presses the first concave-convex portion 44, so that the first concave-convex cam 5 moves axially relative to the first rotating member 4, and simultaneously the first concave-convex cam 5 is pressed by the relative rotation friction of the friction member 45 and the first bending portion 32 of the first joint member 3 and the elastic deformation of the first elastic member 55, so that the body and the first joint member 3 rotate in the first stage and are stopped at a rotation angle. As shown in fig. 1, 3 and fig. 8 and 9, when the first engaging member 3 and the machine body continue to rotate and spread (for example, after 120 degrees), the arc-shaped protruding portion 64 of the wrapping member 6 pushes against the protruding portion 812 of the second rotating member 8, so that the second rotating member 8 compresses the second elastic member 83, and the second rotating member 8 moves axially relative to the wrapping member 6, the machine body and the first engaging member 3 can rotate in the second stage, so that the machine body can be stopped at a larger opening angle, and can be turned back to the first stage and continue to be used after the second stage is turned over.

Fig. 10 shows a second embodiment of the spindle structure 1 according to the present utility model, which differs from the first embodiment in that: one end periphery of the cladding member 6 is provided with a notch which is used as a fourth clamping part 66; the connecting piece 9 is an L-shaped plate, one end of the connecting piece 9 is riveted with one end of the first connecting piece 3, and when the connecting piece 9 is implemented, one end of the connecting piece 9 can be combined with one end of the first connecting piece 3 in a locking mode; the other end of the engagement member 9 has a downward and stepwise reduced tab as the third engaging portion 91; the third engaging portion 91 is engaged with the fourth engaging portion 66, and can also rotate the covering member 6 and the first engaging member 3 synchronously.

In summary, according to the utility model, one end of the first joint member is connected with the first rotating member and the concave-convex wheel, and two ends of the second joint member are respectively connected with the cladding member and the second rotating member, when the first joint member is rotated, the first rotating member is driven to interfere with the concave-convex wheel, and after the first joint member continues to rotate, the cladding member is driven to interfere with the second rotating member, so as to generate intermittent double-stop torsion, thereby not only limiting the torsion value in the initial rotation within a preset tolerance range, namely being capable of conveniently controlling the torsion, but also slowing down the abrupt change of the rotation torsion in the subsequent rotation, enabling the integral torsion change to be controlled within a certain range value, enabling the machine body to realize a better free stagnation effect, and maintaining the stability of rotation, but also being capable of rotating back and continuing to be repeatedly used after the machine body connected with the first joint member is overturned; furthermore, the shape of the cladding member of the second embodiment is changed, and a connecting member is added between the cladding member and the first connecting member, which is more beneficial to the manufacture and assembly of the components.

Although the preferred embodiments of the present utility model have been disclosed for achieving this object, it should be appreciated by those skilled in the art that variations or modifications may be accomplished without deviating from the spirit and scope of the present utility model.

Claims

1. A rotary shaft structure, comprising:

One end of the first joint piece is connected with a pivot in a relative rotation mode, and the one end of the first joint piece is provided with a first clamping part and a first clamping part;

The first rotating piece is connected with the pivot in a relative rotation mode, one end of the first rotating piece is provided with a second clamping part, and the second clamping part is connected with the first clamping part and is used for enabling the first rotating piece and the first joint piece to synchronously rotate; the other end of the first rotating piece is provided with a first concave-convex part;

The first concave-convex wheel is connected with the pivot in a synchronous rotation mode, one end of the first concave-convex wheel is provided with a first elastic piece, the other end of the first concave-convex wheel is provided with a second concave-convex part, and the second concave-convex part is in butt joint with the first concave-convex part and is used for enabling the first concave-convex wheel to axially move when rotating relative to the first rotating piece;

The cladding piece is connected with the pivot in a relative rotation mode, one end of the cladding piece is provided with a second clamping part, and the second clamping part is connected with the first clamping part and is used for enabling the cladding piece and the first joint piece to synchronously rotate; the other end of the cladding piece is provided with a third concave-convex part;

One end of the second joint piece is fixedly sleeved with the pivot and arranged at the other end of the cladding piece, and the one end of the second joint piece is provided with a limiting hole; and

The second rotating piece is sleeved with the pivot and arranged at one end of the second joint piece, one end of the second rotating piece is provided with a second elastic piece, the other end of the second rotating piece is provided with a protruding part, and one end of the protruding part penetrates through the limiting hole to butt against the third concave-convex part and is used for enabling the cladding piece to axially move when rotating to an angle relative to the second rotating piece.

2. The rotating shaft structure according to claim 1, wherein one end of the pivot has a first cylindrical portion and a first positioning rod portion extending axially, the other end of the pivot has a second cylindrical portion and a second positioning rod portion extending axially, the one end of the first engaging member is connected to the first cylindrical portion in a relatively rotating manner, the first rotating member is sleeved with the first positioning rod portion in a relatively rotating manner, the first cam is sleeved with the first positioning rod portion in a synchronously rotating manner, and the covering member is sleeved with the second cylindrical portion in a relatively rotating manner.

3. The rotating shaft structure according to claim 2, wherein the second rotating member is sleeved with the second positioning rod portion, the second rotating member includes a cam member and a positioning member, a first limiting portion is disposed on one end face of the cam member, and the protruding portion is disposed on the other end face of the cam member; the positioning piece is sleeved with the second positioning rod part in a synchronous rotation mode, one end of the positioning piece is provided with the second elastic piece, the positioning piece is provided with a second limiting part, and the second limiting part is connected with the first limiting part and is used for enabling the positioning piece and the cam piece to synchronously rotate.

4. The rotating shaft structure according to claim 2, wherein the middle section of the pivot shaft has an outer ring portion, and the two axial ends of the outer ring portion have the first cylindrical portion and the second cylindrical portion, respectively.

5. The rotating shaft structure according to claim 2, further comprising a friction member coupled to the first positioning rod portion in a synchronous rotation manner, and the friction member is located between the one end of the first engaging member and the first rotating member.

6. The rotating shaft structure according to claim 1, wherein the first concave-convex portion of the first rotating member comprises a first arc-shaped concave portion and a second arc-shaped concave portion, the second concave-convex portion of the first concave-convex cam comprises a first arc-shaped convex portion and a second arc-shaped convex portion, the first arc-shaped convex portion is abutted with the first arc-shaped concave portion, and the second arc-shaped convex portion is abutted with the second arc-shaped concave portion.

7. The rotating shaft structure according to claim 1, wherein the third concave-convex portion of the covering member includes an arc-shaped planar portion and an arc-shaped convex portion, and both ends of the arc-shaped planar portion rise gradually to form the arc-shaped convex portion.

8. A rotary shaft structure, comprising:

One end of the first joint piece is connected with a pivot in a relative rotation mode, and the one end of the first joint piece is provided with a first clamping part;

One end of the connecting piece is combined with the one end of the first connecting piece, and the other end of the connecting piece is provided with a third clamping part;

The cladding piece is connected with the pivot in a relative rotation mode, one end of the cladding piece is provided with a fourth clamping part, and the fourth clamping part is connected with the third clamping part and is used for enabling the cladding piece and the first joint piece to synchronously rotate; the other end of the cladding piece is provided with a third concave-convex part;

9. The rotating shaft structure according to claim 8, wherein one end of the pivot has a first cylindrical portion and a first positioning rod portion extending axially, the other end of the pivot has a second cylindrical portion and a second positioning rod portion extending axially, the one end of the first engaging member is sleeved with the first cylindrical portion in a relatively rotating manner, the first rotating member is sleeved with the first positioning rod portion in a relatively rotating manner, the first cam is sleeved with the first positioning rod portion in a synchronously rotating manner, and the covering member is sleeved with the second cylindrical portion in a relatively rotating manner; the first concave-convex part of the first rotating piece comprises a first arc concave part and a second arc concave part, the second concave-convex part of the first concave-convex wheel comprises a first arc convex part and a second arc convex part, the first arc convex part is in butt joint with the first arc concave part, and the second arc convex part is in butt joint with the second arc concave part; the third concave-convex part of the cladding piece comprises an arc-shaped plane part and an arc-shaped protruding part, and two ends of the arc-shaped plane part gradually rise to form the arc-shaped protruding part.

10. The rotating shaft structure according to claim 9, wherein the second rotating member is sleeved with the second positioning rod portion, the second rotating member includes a cam member and a positioning member, a first limiting portion is disposed on one end face of the cam member, and the protruding portion is disposed on the other end face of the cam member; the positioning piece is connected with the second positioning rod part in a synchronous rotation mode, one end of the positioning piece is provided with the second elastic piece, the positioning piece is provided with a second limiting part, and the second limiting part is connected with the first limiting part and is used for enabling the positioning piece and the cam piece to synchronously rotate.