Rotating shaft assembly, rotating mechanism and keyboard

Abstract

The utility model provides a rotating shaft assembly, a rotating mechanism and a keyboard. The rotating shaft assembly comprises a shaft core; the shaft core is rotatably sleeved with the concave wheel, a first matching part is arranged on the end face of one end of the concave wheel in a protruding mode, a plurality of grooves are formed in the first matching part and distributed around the center axis of the concave wheel at intervals, and the side wall of each groove inclines to the end face of the concave wheel; the shaft core is fixedly sleeved with the cam, a second matching part is arranged on the end face of the end, close to the concave wheel, of the cam in a protruding mode, the second matching part is suitable for being inserted into the groove, and the side wall of the second matching part inclines to the end face of the cam so that the side wall of the second matching part can be suitable for being attached to the side wall of the groove. Through the arrangement, the hovering function of the rotating shaft assembly at multiple rotating angles is achieved, in the relative rotating process of the shaft core and the concave wheel, the second matching part automatically falls into the groove along the inclined face through inertia, and automatic locking and hovering of the rotating shaft at the corresponding rotating angle are achieved; therefore, the rotating shaft assembly is kept at the position corresponding to the rotating angle.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment accessories, and in particular to a shaft assembly, a rotating mechanism and a keyboard. Background Art

[0002] The hinge is used in electronic devices such as mobile phones, tablet computers, and keyboards. The opening and closing functions of the electronic devices are realized by rotating the hinge.

[0003] In recent years, the application of electronic devices such as tablet keyboards has become more and more popular, and users have higher and higher demands for the opening and closing feel of the keyboards, which has led to the demand for hovering and automatic locking of the hinges. Utility Model Content

[0004] In view of this, the present application provides a hinge assembly, a rotation mechanism and a keyboard, which can meet the requirements of the hinge's hovering and automatic locking.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, the present application provides a shaft assembly, the shaft assembly comprising:

[0007] Axis core;

[0008] A concave wheel is rotatably sleeved on the shaft core, and a first matching portion is convexly provided on an end surface of one end of the concave wheel, and a plurality of grooves are formed on the first matching portion. The plurality of grooves are spaced and distributed around the central axis of the concave wheel, and the side wall of each of the grooves is inclined to the end surface of the concave wheel;

[0009] A cam is fixedly sleeved on the shaft core, and a second matching portion is convexly provided on an end face of the cam close to the concave wheel, and the second matching portion is suitable for being inserted into the groove, and the side wall of the second matching portion is inclined to the end face of the cam so that the side wall of the second matching portion is suitable for fitting with the side wall of the groove.

[0010] In an optional embodiment, the side wall of the groove smoothly transitions to the end surface of the first matching portion.

[0011] In an optional embodiment, when the second matching portion is inserted into the groove, there is a gap between the end surface of the second matching portion and the bottom wall of the groove.

[0012] In an optional embodiment, the groove is fan-shaped, and the center of the fan-shaped groove is located on the central axis of the cam wheel.

[0013] In an optional embodiment, a first limit block is protruding from one end of the cam wheel away from the cam, and the shaft core is provided with a second limit block corresponding to the first limit block, and the second limit block is suitable for abutting against the first limit block along the circumference of the shaft core to limit the rotation angle of the shaft core.

[0014] In an optional embodiment, the rotating shaft assembly also includes an elastic member and a nut, wherein the elastic member is sleeved on the shaft core and connected to the end of the cam facing away from the concave wheel, the elastic member can be deformed in the direction of its own length, and the nut is threadedly connected to the shaft core and connected to the end of the elastic member facing away from the cam.

[0015] In an optional embodiment, the rotating shaft assembly further includes a torsion spring and a fixing member, wherein the torsion spring is at least partially sleeved on the shaft core and is located on a side of the nut away from the elastic member, and one end of the torsion spring away from the nut is connected to the fixing member.

[0016] In an optional embodiment, the shaft assembly further includes a gasket, which is sleeved on the shaft core and located between the elastic member and the nut, and two opposite surfaces of the gasket are provided with raised patterns.

[0017] In a second aspect, the present application provides a rotating mechanism, which includes a first shell, a second shell, and a rotating shaft assembly provided by any embodiment of the first aspect, wherein a portion of the rotating shaft assembly is fixed in the first shell, and the other portion is accommodated in the second shell, wherein one end of the shaft core of the rotating shaft assembly is fixedly connected to the first shell, and the concave wheel of the rotating shaft assembly is fixedly connected to the second shell, so that the first shell can rotate relative to the second shell.

[0018] In an optional embodiment, the number of each of the second shell and the rotating shaft assembly is two, and the two second shells are respectively arranged at two ends of the first shell.

[0019] In a third aspect, the present application provides a keyboard, comprising the rotating mechanism provided by any one of the embodiments of the second aspect.

[0020] The beneficial effects of the technical solution provided in the embodiment of the present application include at least: by rotatably sleeved the cam on the shaft core, a rotational connection between the cam and the shaft core is achieved, thereby ensuring the rotation function of the shaft assembly; by setting a plurality of grooves, into which the second matching portion can be inserted, the hovering function of the shaft assembly at a plurality of rotation angles can be achieved; by setting the side wall of the groove to be inclined to the end face of the cam, and the side wall of the second matching portion to be inclined to the end face of the cam, in the process of relative rotation between the shaft core and the cam, inertia is utilized to make the second matching portion automatically fall into the groove along the inclined surface, thereby achieving automatic locking and hovering of the shaft at the corresponding rotation angle, thereby keeping the shaft assembly at a position corresponding to the rotation angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 An exploded view of the shaft assembly provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of a cam wheel provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a cam provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the cooperation between the second cooperation portion and the groove provided in an embodiment of the present application;

[0026] Figure 5 A front view of a cam wheel provided in an embodiment of the present application;

[0027] Figure 6 A schematic diagram of the coordination of the first limiting block and the second limiting block provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of an exploded view of the rotation mechanism provided in an embodiment of the present application.

[0029] The reference numerals in the figures represent respectively:

[0030] 10-shaft assembly;

[0031] 1-shaft core; 11-second limit block;

[0032] 2-concave wheel; 21-first matching portion; 211-groove; 22-first limit block;

[0033] 3-cam; 31-second matching portion; 311-gap;

[0034] 4-elastic part; 5-nut; 6-torsion spring; 7-fixing part; 8-gasket; 9-connector;

[0035] 100-first shell; 200-second shell.

[0036] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] The directional nouns involved in the embodiments of the present application, such as "upper", "lower", "side", etc., are generally based on the relative relationship of the directions shown in the figures, and these directional nouns are used only to more clearly describe the relationship between structures, and are not intended to describe absolute directions. When the product is placed in different postures, the direction may change, for example, "upper" and "lower" may be interchangeable.

[0039] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as those generally understood by those of ordinary skill in the art. Some technical terms appearing in the embodiments of the present application are explained below.

[0040] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0041] like Figure 1 As shown, an embodiment of the present application provides a rotating shaft assembly 10 , which includes a shaft core 1 , a concave wheel 2 and a cam 3 .

[0042] like Figure 1 and Figure 2 As shown, the cam 2 is rotatably sleeved on the shaft core 1, and a first matching portion 21 is convexly provided on one end surface of the cam 2. The first matching portion 21 forms a groove 211, and the side wall of the groove 211 is inclined to the end surface of the cam 2. The cam 2 and the shaft core 1 are coaxially arranged, and relative rotation can be generated between the cam 2 and the shaft core 1.

[0043] like Figure 1 and Figure 3 As shown, the cam 3 is fixedly sleeved on the shaft core 1, and a second matching portion 31 is convexly provided on the end surface of the cam 3 close to the cam wheel 2. The second matching portion 31 is suitable for being inserted into the groove 211, and the side wall of the second matching portion 31 is inclined to the end surface of the cam 3, so that the side wall of the second matching portion 31 is suitable for being fitted with the side wall of the groove 211. The cam 3 is coaxially arranged with the shaft core 1, and the cam 3 can move synchronously with the shaft core 1.

[0044] The shaft core 1 is fixedly connected to the first housing 100 , and the cam 2 is fixedly connected to the second housing 200 . Since the cam 2 is rotatably sleeved on the shaft core 1 , relative rotation between the first housing 100 and the second housing 200 can be achieved.

[0045] Exemplarily, mounting holes are provided in the first shell 100 and the second shell 200, the shaft core 1 is inserted into the mounting hole of the first shell 100 and has an interference fit with the first shell 100, and the concave wheel 2 is located in the mounting hole of the second shell 200 and has an interference fit with the second shell 200.

[0046] Exemplarily, the hinge assembly 10 is applied to a tablet keyboard, the second shell 200 is a base for mounting the keyboard body, the first shell 100 is used to mount a tablet computer and the first shell 100 can rotate relative to the second shell 200 to adjust the angle between the tablet computer and the keyboard body.

[0047] The concave wheel 2 and the cam 3 are distributed along the length direction of the shaft core 1. The first matching portion 21 is convexly arranged on the end surface of the concave wheel 2 close to the cam 3. The groove 211 is concave relative to the end surface of the first matching portion 21, and the side wall of the groove 211 is an inclined surface. Figure 2 As shown, each groove 211 has two side walls arranged opposite to each other, and both side walls are inclined surfaces.

[0048] Exemplarily, the plurality of grooves 211 are evenly spaced around the central axis of the cam 2 , thereby facilitating even adjustment of the relative rotation angle between the shaft core 1 and the cam 2 .

[0049] The second matching portion 31 corresponds to the first matching portion 21. When the second matching portion 31 is inserted into the groove 211, the shaft assembly 10 is in a suspended state, that is, the shaft core 1 and the cam 2 remain relatively stationary. When the shaft assembly 10 is not subjected to external force, no relative rotation occurs between the shaft core 1 and the cam 2.

[0050] The side wall of the second matching portion 31 is matched with the side wall of the cam 2, that is, the angle between the side wall of the second matching portion 31 and the end face of the second matching portion 31 is equal to the angle between the side wall of the groove 211 and the end face of the cam 2. With this arrangement, after the side wall of the second matching portion 31 contacts the side wall of the groove 211, under the action of inertia, the side wall of the second matching portion 31 can slide along the side wall of the groove 211, so that the second matching portion 31 automatically enters the groove 211, realizing the hovering and automatic locking of the shaft assembly 10, and improving the stability of the shaft assembly 10; and after the user applies force to the shaft assembly 10 again, the second matching portion 31 can smoothly detach from the groove 211 along the side wall of the groove 211, releasing the hovering state and reducing the stuck feeling when the shaft assembly 10 rotates.

[0051] Exemplarily, when the second matching portion 31 is inserted into the groove 211 , the side wall of the second matching portion 31 fits with the side wall of the cam 2 , thereby improving the stability during hovering.

[0052] The shaft assembly 10 provided in the embodiment of the present application realizes the rotational connection between the cam 2 and the shaft core 1 by rotatably sleeved the cam 2 on the shaft core 1, thereby ensuring the rotation function of the shaft assembly 10; by setting a plurality of grooves 211, and the second matching portion 31 can be inserted into the groove 211, the hovering function of the shaft assembly 10 at a plurality of rotation angles can be realized; by setting the side wall of the groove 211 to be inclined to the end face of the cam 2, and the side wall of the second matching portion 31 to be inclined to the end face of the cam 3, in the process of relative rotation between the shaft core 1 and the cam 2, inertia is utilized to make the second matching portion 31 automatically fall into the groove 211 along the inclined surface, thereby realizing automatic locking and hovering of the shaft at the corresponding rotation angle, thereby keeping the shaft assembly 10 at the position corresponding to the rotation angle.

[0053] In a further embodiment, the side wall of the groove 211 and the end surface of the first matching portion 21 are smoothly transitioned.

[0054] Specifically, the side wall of the groove 211 and the end surface of the first matching portion 21 are chamfered, so that the transition between the side wall of the groove 211 and the end surface of the first matching portion 21 is smooth.

[0055] This arrangement facilitates the second matching portion 31 to be inserted into or out of the groove 211 , while preventing the first matching portion 21 and the second matching portion 31 from being damaged during relative rotation.

[0056] In a specific embodiment, when the second matching portion 31 is inserted into the groove 211 , a gap 311 is provided between the end surface of the second matching portion 31 and the bottom wall of the groove 211 .

[0057] like Figure 4As shown, when the second matching portion 31 is inserted into the groove 211 , the end surface of the second matching portion 31 is parallel to the bottom wall of the groove 211 and is spaced apart.

[0058] Through this arrangement, the gap 311 between the end face of the second matching part 31 and the bottom wall of the groove 211 plays a ventilation role, preventing the formation of a vacuum between the second matching part 31 and the groove 211 and affecting the release of the hinge assembly 10 from the hovering state. At the same time, it plays a certain buffering role, preventing the second matching part 31 from colliding with the bottom wall of the groove 211 after entering the groove 211, causing noise or damage.

[0059] In a further embodiment, the groove 211 is in a sector shape, and the center of the sector is located on the central axis of the cam 2 .

[0060] Specifically, Figure 5 As shown, the bottom wall of the groove 211 is fan-shaped, and the outer contour of the orthographic projection of the groove 211 on the end surface of the cam 2 is also fan-shaped. It can be understood that the side wall shape of the second matching portion 31 is adapted to the shape of the side wall of the groove 211.

[0061] Through this arrangement, the matching process between the side wall of the groove 211 and the side wall of the second matching portion 31 is more adapted to the rotation trajectory of the shaft core 1 or the cam 2, so that the relative movement between the first matching portion 21 and the second matching portion 31 is smoother.

[0062] A first limit block 22 is protruded from one end of the cam wheel 2 away from the cam 3, and the shaft core 1 is provided with a second limit block 11 corresponding to the first limit block 22. The second limit block 11 is suitable for abutting against the first limit block 22 along the circumference of the shaft core 1 to limit the rotation angle of the shaft core 1.

[0063] like Figure 6 As shown, the number of the first limit block 22 is one, the shape of the first limit block 22 is fan-shaped, and the second limit block 11 protrudes outward along the radial direction of the shaft core 1.

[0064] By setting the first limit block 22 and the second limit block 11, the maximum rotation angle of the shaft assembly 10 can be limited. When the first limit block 22 and the second limit block 11 abut, the shaft core 1 cannot continue to rotate in the opening direction, but can rotate in the closing direction, so that the first limit block 22 and the second limit block 11 no longer abut.

[0065] Based on any of the above embodiments, the shaft assembly 10 also includes an elastic member 4 and a nut 5. The elastic member 4 is sleeved on the shaft core 1 and connected to the end of the cam 3 away from the cam wheel 2. The elastic member 4 can be deformed in its own length direction. The nut 5 is threadedly connected to the shaft core 1 and connected to the end of the elastic member 4 away from the cam 3.

[0066] Exemplarily, the elastic member 4 is a component with elastic deformation capability such as a spring or a disc spring.

[0067] One end of the elastic member 4 is connected to the cam 3 , and the other end is connected to the nut 5 . By screwing the nut 5 , the distance between the nut 5 and the cam 3 can be adjusted, thereby adjusting the length of the elastic member 4 and the squeezing force of the elastic member 4 on the cam 3 .

[0068] In this embodiment, by providing the elastic member 4 , the elastic force of the elastic member 4 can be used to squeeze the cam 3 , thereby making the cam 3 close to the cam wheel 2 , which is beneficial for the cooperation between the cam 3 and the cam wheel 2 .

[0069] like Figure 1 As shown, the shaft assembly 10 also includes a torsion spring 6 and a fixing member 7. The torsion spring 6 is at least partially sleeved on the shaft core 1 and is located on the side of the nut 5 away from the elastic member 4. The end of the torsion spring 6 away from the nut 5 is connected to the fixing member 7.

[0070] Specifically, the fixing member 7 is fixedly connected to the second shell 200, and the end of the torsion spring 6 close to the nut 5 is fixedly connected to the shaft core 1. Therefore, when the shaft core 1 rotates along its own central axis, the end of the torsion spring 6 close to the nut 5 rotates with the shaft core 1, and the end of the torsion spring 6 away from the nut 5 is fixed by the fixing member 7, so that the torsion spring 6 twists and can generate torque.

[0071] In this embodiment, by adjusting the initial torque value and rotation direction and other parameters of the torsion spring 6, the use requirements of the shaft assembly 10 such as light opening and heavy closing can be achieved, and the opening and closing feel of the shaft assembly 10 can be improved.

[0072] Alternatively, if Figure 1 As shown, the shaft assembly 10 also includes a connector 9 sleeved on the shaft core 1, the connector 9 is fixedly connected to the shaft core 1 and is located on the side of the nut 5 away from the elastic member 4, the connector 9 moves synchronously with the shaft core 1, the torsion spring 6 is sleeved on the outer periphery of the connector 9, and the end of the torsion spring 6 close to the nut 5 is fixedly connected to the connector 9. By providing the connector 9, the torsion spring 6 can be supported and the radial deformation of the torsion spring 6 can be limited.

[0073] like Figure 1 As shown, the shaft assembly 10 further includes a gasket 8, which is sleeved on the shaft core 1 and located between the elastic member 4 and the nut 5, and two opposite surfaces of the gasket 8 are provided with raised patterns.

[0074] By providing the gasket 8 and providing raised patterns on the surface of the gasket 8 , the friction between the gasket 8 and the nut 5 can be increased to prevent the nut 5 from loosening.

[0075] like Figure 7As shown, the embodiment of the present application further provides a rotation mechanism, comprising a first housing 100, a second housing 200, and a shaft assembly 10 provided in any of the above embodiments. A portion of the shaft assembly 10 is fixed in the first housing 100, and another portion is accommodated in the second housing 200, wherein one end of the shaft core 1 of the shaft assembly 10 is fixedly connected to the first housing 100, and the concave wheel 2 of the shaft assembly 10 is fixedly connected to the second housing 200, so that the first housing 100 can rotate relative to the second housing 200.

[0076] Exemplarily, mounting holes are provided in the first shell 100 and the second shell 200, one end of the shaft core 1 is inserted into the mounting hole of the first shell 100 and has an interference fit with the first shell 100, and the concave wheel 2 is located in the mounting hole of the second shell 200 and has an interference fit with the second shell 200.

[0077] Exemplarily, the rotating mechanism is applied to a tablet keyboard, the second shell 200 is a base for mounting the keyboard body, the first shell 100 is used to mount a tablet computer and the first shell 100 can rotate relative to the second shell 200, thereby adjusting the angle between the tablet computer and the keyboard body.

[0078] Furthermore, there are two second shells 200 and two rotating shaft assemblies 10 , and the two second shells 200 are respectively disposed at two ends of the first shell 100 .

[0079] like Figure 7 As shown, the two second shells 200 correspond to the two rotating shaft assemblies 10 one by one, and the two second shells 200 are symmetrically arranged at both ends of the length direction of the first shell 100, which helps to improve the stability of the rotating mechanism.

[0080] An embodiment of the present application also provides a keyboard, comprising the rotating mechanism provided in the above embodiment.

[0081] Specifically, the keyboard is a tablet keyboard, the second shell 200 is a base for mounting the keyboard body, the first shell 100 is used to mount the tablet computer and the first shell 100 can rotate relative to the second shell 200 to adjust the angle between the tablet computer and the keyboard body.

[0082] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0083] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0084] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A rotating shaft assembly (10), characterized in that: The rotating shaft assembly (10) comprises: Axle core (1); A cam (2) is rotatably sleeved on the shaft core (1); a first matching portion (21) is convexly provided on an end surface of one end of the cam (2); a plurality of grooves (211) are formed on the first matching portion (21); the plurality of grooves (211) are spaced apart and distributed around the central axis of the cam (2); and a side wall of each groove (211) is inclined toward the end surface of the cam (2); A cam (3) is fixedly sleeved on the shaft core (1); a second matching portion (31) is convexly provided on an end surface of the cam (3) close to the concave wheel (2); the second matching portion (31) is suitable for being inserted into the groove (211); a side wall of the second matching portion (31) is inclined at the end surface of the cam (3) so that the side wall of the second matching portion (31) is suitable for being fitted with the side wall of the groove (211).

2. The shaft assembly (10) according to claim 1, characterized in that: The side wall of the groove (211) and the end surface of the first matching portion (21) are in smooth transition.

3. The shaft assembly (10) according to claim 1, characterized in that: When the second matching portion (31) is inserted into the groove (211), a gap (311) is provided between an end surface of the second matching portion (31) and a bottom wall of the groove (211).

4. The shaft assembly (10) according to claim 1, characterized in that: The groove (211) is in a sector shape, and the center of the sector is located on the central axis of the cam wheel (2).

5. The shaft assembly (10) according to claim 1, characterized in that: A first limit block (22) is protruding from one end of the cam wheel (2) away from the cam (3), and the shaft core (1) is provided with a second limit block (11) corresponding to the first limit block (22), and the second limit block (11) is suitable for abutting against the first limit block (22) along the circumference of the shaft core (1) to limit the rotation angle of the shaft core (1).

6. The shaft assembly (10) according to any one of claims 1 to 5, characterized in that: The rotating shaft assembly (10) further comprises an elastic member (4) and a nut (5); the elastic member (4) is sleeved on the shaft core (1) and connected to the end of the cam (3) facing away from the cam wheel (2); the elastic member (4) is capable of deforming in the direction of its own length; the nut (5) is threadedly connected to the shaft core (1) and connected to the end of the elastic member (4) facing away from the cam (3).

7. The shaft assembly (10) according to claim 6, characterized in that: The rotating shaft assembly (10) further comprises a torsion spring (6) and a fixing member (7); the torsion spring (6) is at least partially sleeved on the shaft core (1) and is located on a side of the nut (5) facing away from the elastic member (4); and one end of the torsion spring (6) facing away from the nut (5) is connected to the fixing member (7).

8. The shaft assembly (10) according to claim 6, characterized in that: The rotating shaft assembly (10) further comprises a gasket (8), wherein the gasket (8) is sleeved on the shaft core (1) and located between the elastic member (4) and the nut (5), and two opposite surfaces of the gasket (8) are provided with raised patterns.

9. A rotating mechanism, characterized in that: The rotating mechanism comprises a first shell (100), a second shell (200) and a rotating shaft assembly (10) according to any one of claims 1 to 8, wherein a portion of the rotating shaft assembly (10) is fixed in the first shell (100), and another portion is accommodated in the second shell (200), wherein one end of the shaft core (1) of the rotating shaft assembly (10) is fixedly connected to the first shell (100), and the cam (2) of the rotating shaft assembly (10) is fixedly connected to the second shell (200), so that the first shell (100) can rotate relative to the second shell (200).

10. The rotating mechanism according to claim 9, characterized in that: There are two of each of the second shell (200) and the rotating shaft assembly (10), and the two second shells (200) are respectively arranged at two ends of the first shell (100).

11. A keyboard, characterized in that: The keyboard comprises the rotating mechanism according to claim 9 or 10.

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