Support assembly, protection mechanism, motor assembly and electronic device

Abstract

A support assembly, a protection mechanism, a motor assembly, and an electronic device are provided. The support assembly includes a rotating shaft mechanism and a support (202). The rotating shaft mechanism includes a rotating assembly (301). The rotating assembly includes a first fastening piece (3012), a second fastening piece (3013), a connecting piece (3011), and a connecting rod assembly. The first fastening piece and the second fastening piece are located on the same side of the connecting piece. The first slide slot is disposed on an end surface of the first fastening piece facing the second fastening piece, and the second slide slot (30132) is disposed on an end surface of the second fastening piece facing the first fastening piece. The support includes a first support board (2021), a second support board (2022), and a third support board (2023). The second support board is rotatably connected to the first support board and the third support board. The first support board is fastened to the connecting piece. When the first support board rotates around the rotating shaft mechanism, the connecting rod assembly slides along the first slide slot and the second slide slot, and the connecting piece rotates around the connecting rod assembly. The third support board can slide along a direction toward or away from the rotating shaft mechanism, so that the support can form a stable support structure, thereby improving the structural stability of the support assembly.

Description

[Technical field]

[0001] [CROSS REFERENCE TO RELATED APPLICATIONS] This application claims priority to Chinese Patent Application No. 202111165613.7, entitled "SUPPORT ASSEMBLY, PROTECTION MECHANISM, MOTOR ASSEMBLY, AND ELECTRONIC DEVICE," filed with the China State Intellectual Property Office on September 30, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of electronic device technology, in particular to support assemblies, protection mechanisms, motor assemblies and electronic devices. [Background technology]

[0003] Currently, foldable electronic devices, such as laptops and 2-in-1 products, usually need to be opened manually. The foldable electronic device can be turned on by turning on the power, and can only be used after logging in by keyboard input or biometric fingerprint. This operation process requires a large number of steps, is time-consuming, and reduces the user experience.

[0004] With the rapid development of foldable electronic devices, users have increasingly higher requirements for the use experience of foldable electronic devices. In addition to the poor user experience caused by the above-mentioned complicated operation process, in the process of manually opening and closing a foldable electronic device, the hand feel of the operation, the safety of the operation, the stable support of the foldable electronic device in the open state, the overall thickness of the device in the closed state, etc. are all important factors that affect the user experience.

[0005] Based on this, how to improve the user experience of foldable electronic devices has become a difficult problem that those skilled in the art urgently need to solve. Summary of the Invention

[0006] The present application provides a support assembly, a protection mechanism, a motor assembly, and an electronic device to improve a user's usage experience.

[0007] According to a first aspect, a support assembly is provided. The support assembly may be used for a foldable electronic device. The support assembly may include a rotating shaft mechanism and a support. The rotating shaft mechanism may include a rotating assembly. The rotating assembly may be linked with the support. When the rotating assembly is specifically arranged, the rotating assembly includes a first fastening piece, a second fastening piece, a connecting piece, and a connecting rod assembly. The first fastening piece and the second fastening piece may function as a support base for the entire rotating assembly. The first fastening piece and the second fastening piece are spaced apart. The first fastening piece and the second fastening piece are located on the same side of the connecting piece. Furthermore, a first slide slot is provided on an end surface of the first fastening piece facing the second fastening piece, and a second slide slot is provided on an end surface of the second fastening piece facing the first fastening piece. The connecting piece is rotatably connected to the connecting rod assembly. The connecting rod assembly can slide along the first and second slide slots. When the support is specifically arranged, the support includes a first support board, a second support board, and a third support board arranged around the rotating shaft mechanism, the second support board is located between the first and third support boards, and the second support board is rotatably connected to the first and third support boards. One end of the first support board is fixedly connected to the connecting piece. In this manner, when the first support board rotates around the rotating shaft mechanism, the connecting rod assembly can slide along the first and second slide slots, and the connecting piece rotates around the connecting rod assembly, so that the third support board can slide along a direction toward or away from the rotating shaft mechanism.

[0008] By using the support assembly provided in the present application, the movement trajectory of the connecting rod assembly can be set by designing the specific shape of the first slide slot and the second slide slot. Moreover, since the connecting piece is rotatably connected to the connecting rod assembly, in the process of the connecting rod assembly moving along the specified movement trajectory, the connecting piece can move according to the specified movement trajectory. Moreover, since the first support board is fixedly connected to the connecting piece, in the process of the connecting rod assembly moving along the specified movement trajectory, the first support board can move along the specified movement trajectory to drive the second support board to rotate and enable the third support board to slide along the specified movement trajectory toward or away from the rotating shaft mechanism. It should be noted that in the process of the first support board moving to drive the third support board along the direction toward or away from the rotating shaft mechanism, a triangular support structure surrounding the rotating shaft mechanism can be formed between the first support board, the second support board and the third support board. This can improve the support stability of the support part, thereby improving the structural reliability of the support assembly.

[0009] The rotating assembly may further include a main shaft. The main shaft extends through the first fastener piece, the connecting rod assembly, and the second fastener piece. The main shaft may be rotatably connected to the first fastener piece and the second fastener piece. In the process of the main shaft rotating relative to the first fastener piece and the second fastener piece, the connecting rod assembly may be driven to slide along the first slide slot and the second slide slot to drive the connecting piece to rotate.

[0010] Furthermore, the rotating shaft mechanism may further include a cam and an auxiliary support mechanism. The cam and the main shaft are fastened to each other in the radial direction of the main shaft, so that the main shaft in the rotating process can drive the cam to rotate synchronously. A cam slide slot may be further disposed on the surface of the cam. One end of the auxiliary support mechanism may be accommodated in the cam slide slot, and the other end of the auxiliary support mechanism may be connected to the third support board. In the rotating process of the main shaft, the one end of the auxiliary support mechanism slides along the cam slide slot to drive the third support board to slide along the direction toward or away from the rotating shaft mechanism. In this manner, the sliding stability of the third support board can be improved, and the movement stability of the entire support part can be improved.

[0011] In a possible implementation of the present application, the rotating shaft mechanism may include two rotating assemblies. The two rotating assemblies are spaced apart. One cam is disposed corresponding to each rotating assembly. In this implementation, the auxiliary support mechanism may be located between the two rotating assemblies. When the auxiliary support mechanism is specifically disposed, the auxiliary support mechanism may include a first support rod and a second support rod. The first support rod and the second support rod are disposed in a crossing manner. The middle parts of the first support rod and the second support rod are hinged. Furthermore, one end of the first support rod is received in one cam slide slot, and the other end of the first support rod is hinged to the third support board. One end of the second support rod is received in the other cam slide slot, and the other end of the second support rod is hinged to the third support board. The first support rod and the second support rod of the auxiliary support mechanism are disposed in a crossing manner. Therefore, in the process of the third support board sliding along the direction away from the rotating shaft mechanism, the two support rods rotate around the hinge joints of the two support rods. Furthermore, the movement trajectories of the two support rods can be designed by appropriately designing the cam slide slots so that the two support rods can slide the third support board along the direction away from the rotating shaft mechanism, thereby improving the sliding stability of the third support board.

[0012] In a possible implementation of the present application, the support assembly may further include a keyboard body. The support may be rotatably connected to the keyboard body via a rotating shaft mechanism. The third support board sliding along a direction toward or away from the rotating shaft mechanism may also be understood as the third support board sliding along a direction toward or away from the keyboard body. Furthermore, a receptacle may be disposed in the keyboard body. At least a portion of the third support board may be accommodated in the receptacle. The third support board may slide within the receptacle. In this manner, when the sliding stability of the third support board is improved, the third support board may further be hidden within the keyboard body to improve the appearance aesthetics of the support assembly.

[0013] In the present application, when the third support board is specifically arranged, the third support board includes a circular arc-shaped board segment and a straight board segment fixedly connected. The circular arc-shaped board segment is located between the second support board and the straight board segment. The second support board is rotatably connected to the circular arc-shaped board. When the third support board slides toward the keyboard body, the circular arc-shaped board segment can cover the rotating shaft mechanism to prevent the rotating shaft mechanism from being exposed, thereby protecting the rotating shaft mechanism and improving the appearance aesthetics of the support assembly. Furthermore, at least a part of the straight board segment of the third support board can be received in a receptacle to guide the sliding of the third support board.

[0014] In a possible implementation of the present application, the support assembly may further include a host support kit. The host support kit is fixedly connected to the connection piece. The host support kit is located on a side of the first support board facing the keyboard body. The host support kit is fixedly connected to an end of the first support board facing the connection piece. The host support kit may be configured to support a host attached to the support assembly. Furthermore, a surface of the host support kit that contacts the host may be set to an arc-shaped surface to improve the reliability of the connection between the host and the host support kit.

[0015] In the present application, when specifically disposing the connecting rod assembly, the connecting rod assembly may include a first connecting rod and a second connecting rod. The first connecting rod is located between the connecting piece and the second connecting rod. The second connecting rod is located between the first fastening piece and the second fastening piece. The main shaft passes through the second connecting rod. In the radial direction of the main shaft, the main shaft and the second connecting rod are fastened to each other. Therefore, in the process of rotating the main shaft, the second connecting rod can be driven to rotate synchronously. Furthermore, one end of the first connecting rod is rotatably connected to the connecting piece, and the other end of the first connecting rod is rotatably connected to the second connecting rod. One end of the rotating shaft rotatably connected to the first connecting rod and the second connecting rod is located in the first slide slot, and the other end of the rotating shaft is located in the second slide slot. In this method, a rotating shaft rotatably connected to the first connecting rod and the second connecting rod slides within the first sliding slot and the second sliding slot such that the connecting rod assembly slides within the first sliding slot and the second sliding slot to drive the connecting piece to rotate.

[0016] When the connecting piece is specifically arranged, the connecting piece may include a body portion. The body portion has a first edge portion and a second edge portion arranged opposite to each other. The first mounting portion, the second mounting portion, and the third mounting portion are arranged on the first edge portion. The first mounting portion and the second mounting portion are spaced apart. The body portion includes a first surface and a second surface arranged opposite to each other. The first mounting portion and the second mounting portion extend in a direction away from the second surface. The third mounting portion is located on the second surface. The third mounting portion extends along a direction from the first edge portion to the second edge portion.

[0017] In the present application, the rotating assembly further includes an intermediate connecting rod. There may be two intermediate connecting rods. One end of one of the intermediate connecting rods is rotatably connected to the first mounting part, and the other end of the intermediate connecting rod is rotatably connected to the first fastening piece. One end of the other of the intermediate connecting rods is rotatably connected to the second mounting part, and the other end of the other intermediate connecting rod is rotatably connected to the second fastening piece, so that the body of the rotating assembly can be rotatably connected to the two fastening pieces via the two intermediate connecting rods. Furthermore, one end of the first connecting rod facing the connecting piece is rotatably connected to the end of the third mounting part, which is away from the first edge. Furthermore, since the rotating shaft rotatably connected to the first connecting rod and the second connecting rod slides within the first sliding slot and the second sliding slot, the first connecting rod can move according to a defined movement trajectory by designing the trajectories of the first sliding slot and the second sliding slot, so that the connecting piece can rotate around the first connecting rod according to the defined trajectory.

[0018] In a possible implementation of the present application, the first support board can be fixedly connected to the first surface of the connecting piece, in this way the first support board and the connecting piece can rotate along the same movement trajectory.

[0019] When the support assembly provided in the present application is used for an electronic device, different users have personalized requirements for the extension angle of the electronic device. In order to meet the usage requirements of different users, in the present application, the first support board can further hover at a certain rotation position under a damping force without an external force, so that the included angle between the first support board and the third support board meets the usage requirements of the user. In a specific implementation, the rotation assembly can further include a first elastic piece. The elastic piece is disposed on a side of the first fastening piece, away from the second fastening piece. The elastic force generated by the first elastic piece along the axis of the main shaft can be applied to the first fastening piece.

[0020] Further, the rotating assembly further includes a first extrusion structure. The first extrusion structure may be located between the first fastening piece and the first elastic piece. The first extrusion structure may be sleeved on the main shaft. The first extrusion structure and the main shaft are fastened relative to each other in the radial direction of the main shaft. When the first extrusion structure rotates with the main shaft, the deformation amount of the first elastic piece changes. The main shaft is rotatably connected to the first fastening piece, and the first extrusion mechanism and the main shaft can rotate synchronously, so that in the process of rotating the main shaft, the first extrusion mechanism and the first fastening piece can rotate relative to each other. However, the deformation amount of the first elastic piece changes, and the elastic force applied to the first extrusion structure by the first elastic piece changes. Therefore, the extrusion force between the first extrusion mechanism and the first fastening piece changes, and the damping force generated by the sliding friction between the first extrusion mechanism and the first fastening piece changes. In this way, the user's hand feeling can be improved. Furthermore, when the external force is removed, the first pushing mechanism and the first fastening piece may stop relative rotation under a damping force generated between the first pushing mechanism and the first fastening piece, so that the support assembly hovers at the corresponding rotational position.

[0021] In the present application, in order to allow the support assembly to stably stay in a defined rotational position, the rotating assembly may further include a second extrusion structure. The second extrusion structure is disposed between the first extrusion structure and the first fastening piece. The second extrusion structure is disposed in a sleeve-like manner on the main shaft. The main shaft is rotatably connected to the second extrusion structure. Furthermore, the first elastic piece presses the first extrusion structure toward the second extrusion structure. The first slot is disposed on an end surface of the first extrusion structure that faces the first fastening piece. The first protrusion is disposed on an end surface of the second extrusion structure that faces the first extrusion structure. It can be understood that when the first protrusion falls into the first slot, the total length of the first extrusion structure and the second extrusion structure is the shortest in the axial direction of the main shaft. In this case, the deformation amount of the first elastic piece is the smallest, and the damping force generated between the first extrusion structure and the second extrusion structure is relatively small. When the first protrusion is located outside the first slot, the total length of the first extrusion structure and the second extrusion structure is the largest in the axial direction of the main shaft. In this case, the deformation amount of the first elastic piece is the largest, and the damping force generated between the first extrusion structure and the second extrusion structure is relatively large. Therefore, the damping force generated between the first extrusion structure and the second extrusion structure can be adjusted by adjusting the position where the first cam and the second slot are arranged to adjust the position where the support assembly can hover.

[0022] In a possible implementation of the present application, the rotating assembly may further include a second elastic piece. The second elastic piece may be disposed on a side of the second fastening piece away from the first fastening piece. Alternatively, a hollow area is disposed on the second connecting rod, and the second elastic piece is disposed in the hollow area. Furthermore, the second elastic piece is disposed on the main shaft in a sleeve-like manner. One end of the second elastic piece is fixedly connected to the main shaft, and the other end of the second elastic piece is fixedly connected to the second fastening piece. Since the main shaft is rotatable around the second fastening piece, the second elastic piece can generate an elastic force around the axial direction of the main shaft in the process of rotating the main shaft. By utilizing this elastic force, a corresponding hand feel can be provided to the user in the process of rotating the support assembly, thereby improving the user experience.

[0023] In the present application, the support assembly may further include a keyboard body. The support may be rotatably connected to the keyboard body via a rotating shaft assembly. Furthermore, the keyboard body includes a rotating shaft connecting piece, a frame assembly, and a key. The rotating shaft connecting piece may move with the movement of the rotating shaft mechanism. Specifically, when the rotating shaft mechanism moves, the rotating shaft connecting piece may be driven to move along a direction toward or away from the rotating shaft mechanism. In the present application, the keys may be in multiple rows arranged in parallel. Each row of keys includes multiple keys. Note that the number of keys in a row may be the same or different. This is not particularly limited in the present application. A key slot is further arranged in the keyboard body. The keys may be accommodated in the corresponding key slot. Furthermore, when the frame assembly is specifically arranged, the frame assembly may include a first frame, a second frame, and a horizontal rod. The first frame and the second frame may be arranged relative to each other. The first frame and the second frame are fixedly connected to the rotating shaft connecting piece. In this way, when the rotating shaft connecting piece moves, the first frame and the second frame can move together with the rotating shaft connecting piece along a direction toward or away from the rotating shaft mechanism. A plurality of rows of keys can be located between the first frame and the second frame. Each row of keys can be arranged along a direction from the first frame to the second frame. Also, one horizontal rod can be arranged corresponding to each row of keys. When the first frame and the second frame move together with the rotating shaft connecting piece toward or away from the rotating shaft mechanism, the horizontal rod can be driven to move along the arrangement direction of each row of keys. Furthermore, with the movement of the horizontal rod, the key can move toward the key slot or move in a direction out of the key slot. In this way, when the keyboard body is in a used state, the key can move along a trajectory defined in a direction out of the key slot to meet the use demand of the user's keystroke input. Furthermore, when the keyboard body is not in use, the key can move toward the key slot.In this way, the part of the key that protrudes from the key slot is relatively small, so that the size of the entire keyboard body is relatively small in the thickness direction, which is helpful to implement a thin design of the support assembly.

[0024] In order for the rotating shaft mechanism to drive the rotating shaft connecting piece to rotate, in a possible implementation of the present invention, the rotating assembly may further include a third connecting rod. The third connecting rod is slidably connected to the second fastening piece. During the rotation process of the main shaft, the third connecting rod can slide along the direction approaching or leaving the keyboard body. On this basis, the rotating shaft connecting piece is fixedly connected to the third connecting rod. Thus, the third connecting rod slides to drive the rotating shaft connecting piece in the direction approaching or leaving the keyboard body.

[0025] In addition, in order to improve the sliding stability of the third connecting rod, in the present application, a sliding portion may be disposed on the second fastening piece, and the third connecting rod may be accommodated in the sliding portion and slide along the sliding portion. In this case, the sliding portion may be useful for guiding the sliding of the third connecting rod to improve the sliding reliability of the third connecting rod.

[0026] A fourth connecting rod may be further disposed on the rotating assembly. The fourth connecting rod is fixedly connected to the second fastening piece. The connection method is not limited to tightly connecting using fasteners such as screws. Furthermore, the fourth connecting rod may be disposed outside the sliding part, and the third connecting rod is limited within the sliding part so as to prevent the third connecting rod from falling off the sliding part, thereby improving the reliability of the sliding connection between the third connecting rod and the second fastening piece.

[0027] According to a second aspect, an electronic device is provided. The electronic device may include a host and the support assembly of the first aspect. The host is detachably connected to the first support board. By using the electronic device provided in the present application, the host may move along a defined track together with the first support board. Furthermore, in the process of the first support board moving and driving the third support board to slide along a direction toward or away from the rotating shaft mechanism, a triangular support structure surrounding the rotating shaft mechanism may be formed between the first support board, the second support board, and the third support board. This may help to improve the support stability of the support for the host, thereby improving the structural reliability of the electronic device.

[0028] The host may be a user terminal including a display and a processor, such as a tablet computer or a mobile phone. When the host and the support assembly are integrated, the electronic device is a user terminal with functions such as folding and supporting functions that can be realized by the support assembly.

[0029] According to a third aspect, a protection mechanism is provided. The protection mechanism includes a fastening frame, a first rotating shaft assembly, a second rotating shaft assembly, a first conversion bracket, and a motor connection piece. The fastening frame can function as a base of the entire protection mechanism to support the entire protection mechanism. When the fastening frame is specifically arranged, the fastening frame can include a first fastening plate and a second fastening plate. The first fastening plate and the second fastening plate are arranged relative to each other to form an installation space between the first fastening plate and the second fastening plate.

[0030] The first rotating shaft assembly and the second rotating shaft assembly are both located within the installation space. The first rotating shaft assembly may include a first shaft and a first gear piece. One end of the first shaft is fastened to the first fastening plate, and the other end of the first shaft is fastened to the second fastening plate. The first gear piece is arranged in a sleeve-like manner on the first shaft. The first gear piece can rotate around the first shaft. The second rotating shaft assembly includes a second shaft and a second gear piece. One end of the second shaft is fastened to the first fastening plate, and the other end of the second shaft extends toward the second fastening plate. The second gear piece is arranged in a sleeve-like manner on the second shaft. The second gear piece can rotate around the second shaft. Furthermore, the first conversion bracket is located between the second gear piece and the second fastening plate, and the first conversion bracket is arranged in a sleeve-like manner on the second shaft.

[0031] In the present application, at least a portion of the motor connection piece is located on a side of the first conversion bracket away from the first fastening plate. The motor connection piece includes a rotation center per piece. An end of the second shaft facing the second fastening plate is inserted into the rotation center piece. An end of the rotation center piece away from the first conversion bracket passes through the second fastening plate. The rotation center piece may be configured to connect to the motor.

[0032] By using the protection mechanism provided in the present application, when the motor drives the rotating center piece to rotate, and the torque applied to the first conversion bracket is smaller than the connection force between the first conversion bracket and the rotating center piece, the first conversion bracket is connected to the motor connection piece. In this case, the first conversion bracket and the rotating center piece can rotate synchronously. In addition, the first conversion bracket can drive the first gear piece to rotate around the first shaft. The rotation torque of the first gear piece can be transmitted to the second rotating shaft assembly. When the torque applied to the second rotating shaft assembly is transmitted to the first conversion bracket through the first gear piece, and the torque applied to the first conversion bracket is larger than the connection force between the first conversion bracket and the rotating center piece, the first conversion bracket can be disconnected from the motor connection piece. Therefore, the following case is avoided: a torque larger than the connection force between the first conversion bracket and the rotating center piece is applied to the rotating center piece. In this manner, the motor connected to the rotating center piece can be protected.

[0033] When the first gear piece is specifically arranged, the first gear piece may include a first gear structure and a second gear structure, and the first gear structure and the second gear structure are spaced apart along a direction from the first fastening plate to the second fastening plate. When the second gear piece is specifically arranged, the second gear piece may include a third gear structure, and the third gear structure may mesh with the first gear structure. Furthermore, the first conversion bracket may include a fourth gear structure, and the fourth gear structure may mesh with the second gear structure. In this manner, when the first conversion bracket drives the first gear piece to rotate around the first shaft, the first gear piece slides along a direction from the first fastening plate to the second fastening plate such that the third gear structure disengages from the first gear structure. However, when the third gear structure disengages from the first gear structure, the rotational torque of the first gear piece is no longer transmitted to the third gear structure. In this case, the second gear structure stops rotating. In the present application, the state in which the third gear structure disengages from the first gear structure may be a state in which the motor drives the protection mechanism to open to the maximum angle.

[0034] From the above description, it can be seen that the first conversion bracket and the rotating center piece can be connected or disconnected. In order to realize the connection or disconnection between the first conversion bracket and the rotating center piece, a specific structure of the first conversion bracket and the rotating center piece can be arranged. During specific implementation, the first conversion bracket can have an accommodation cavity. The opening of the accommodation cavity faces the motor connection piece. The rotating center piece can be inserted into the accommodation cavity. The first conversion bracket can further have a first elastic piece and a rolling piece. The first elastic piece and the rolling piece are accommodated in the accommodation cavity. One end of the first elastic piece abuts against the rotating center piece, and the other end of the first elastic piece presses the rolling piece toward the bottom wall of the accommodation cavity.

[0035] Also, a slot may be further disposed on the bottom wall of the receiving cavity of the first conversion bracket. In this manner, when the rolling piece is received in the slot, the first conversion bracket and the rotation center piece are in a connected state. In this state, the first conversion bracket can rotate synchronously with the rotation center piece. When the rolling piece is disengaged from the slot, the first conversion bracket is separated from the rotation center piece. In this state, the rotation torque of the first conversion bracket cannot be transmitted to the rotation center piece. In this case, the rotation center piece stops rotating.

[0036] In this embodiment, the first stopper may further be disposed on an end of the second gear piece facing the first fastening plate, and the notch is disposed on the first stopper. The second rotating shaft assembly may further include a fast pin and a slide pin. The fast pin and the slide pin are located on a side of the second gear piece facing the first fastening plate. The fast pin is sleeve-like disposed on the second shaft. The fast pin is rotatably connected to the second shaft. The slide pin is disposed between the fast pin and the first stopper. One end of the slide pin facing the fast pin is slidably connected to the fast pin. A second stopper is disposed on one end of the slide pin away from the fast pin. The second stopper may be inserted into the notch. When the second stopper of the slide pin is inserted into the notch, rotation of the second gear piece drives the slide pin to rotate, thereby driving the fast pin to rotate.

[0037] In a possible implementation of the present application, a gasket can be further disposed between the slide pin and the second gear piece. The slide pin and the second gear piece both abut against the gasket. In this manner, when the slide pin and the second gear piece can rotate relative to each other, a damping force can be generated between the slide pin and the second gear piece, which helps to improve the user experience.

[0038] In order to realize the sliding of the first gear piece along the first shaft, in the present application, a guide slot structure may be further arranged on the first gear piece. The guide slot structure may be located between the first gear structure and the first fastening plate. A guide slot may be arranged on the guide slot structure. The guide slot may be arranged in a spiral shape. Furthermore, a guide structure may be arranged on the fixed pin, and the guide structure may be inserted into the guide slot. In this manner, when the fixed pin rotates, the guide structure can slide in the guide slot. However, the guide slot may be arranged in a spiral shape. In the process of sliding the guide structure in the guide slot, the first gear piece may be driven to slide along the axial direction of the first shaft, so that the third gear is separated from the first gear. Also, in the process of rotating the fixed pin, the slide pin may slide with the sliding of the first gear piece. The slide direction of the slide pin may be opposite to the slide direction of the first gear piece.

[0039] In a possible implementation of the present application, the first rotating shaft assembly may further include an assist mechanism. One end of the assist mechanism may be fixedly connected to the first gear piece, and the other end of the assist mechanism is fixedly connected to the first shaft. In this manner, the assist mechanism is appropriately designed so that the assist mechanism can be configured to provide assistance for the first gear piece to slide along the first shaft to improve the sliding reliability of the first gear piece.

[0040] According to a fourth aspect, there is provided a motor assembly including the protection mechanism of the third aspect.

[0041] According to a fifth aspect, an electronic device is provided. The electronic device includes a first housing, a second housing, a rotating assembly, and the motor assembly of the fourth aspect. The first housing and the second housing are disposed on two sides of the rotating assembly. When the motor rotates, the first housing and the second housing are driven to rotate relative to the rotating assembly. By using the electronic device provided in the present application, the motor can drive the first housing and the second housing to rotate relative to the rotating assembly to realize electrical opening and closing of the electronic device. In this manner, the operation steps performed by the user to open and close the electronic device can be simplified, thereby improving the user experience.

[0042] The electronic device may be a user terminal including a display and a processor, for example a notebook computer, a tablet computer, or a mobile phone. The first housing may be configured to mount a display of the electronic device or to carry a host with a display. The second housing may be configured to carry a keyboard body. The keyboard body may be the subject of the keyboard according to the first aspect above. The rotation assembly may be the rotation assembly according to the first aspect above.

[0043] In a possible implementation of the present application, the rotating assembly is located on a side of the first fastening plate away from the second fastening plate, and the rotating assembly and the second rotating shaft assembly rotate synchronously.

[0044] In a possible implementation of the present application, the electronic device further includes a second conversion bracket. The second conversion bracket is located between the first fastening plate and the rotating assembly. The rotating assembly is connected to the second rotating shaft assembly in a transmitting manner through the second conversion bracket.

[0045] According to a sixth aspect, a keyboard assembly is provided. The keyboard assembly may include a keyboard body. The keyboard body includes a rotating shaft connecting piece, a frame assembly, and a key. The rotating shaft connecting piece is connected to the rotating shaft mechanism. The rotating shaft connecting piece can move with the movement of the rotating shaft mechanism. Specifically, when the rotating shaft mechanism moves, the rotating shaft connecting piece can be driven to move along a direction toward or away from the rotating shaft mechanism. In the present application, the keys may be in multiple rows arranged in parallel. Each row of keys includes multiple keys. The number of keys in a row may be the same or different. This is not particularly limited in the present application. A key slot is further arranged in the keyboard body. The keys may be accommodated in the corresponding key slot. Furthermore, when specifically arranging the frame assembly, the frame assembly may include a first frame, a second frame, and a horizontal rod. The first frame and the second frame may be arranged relative to each other. The first frame and the second frame are fixedly connected to the rotating shaft connecting piece. In this method, when the rotating shaft connecting piece moves, the first frame and the second frame can move along a direction toward or away from the rotating shaft mechanism together with the rotating shaft connecting piece. A plurality of rows of keys can be located between the first frame and the second frame. Each row of keys can be arranged along a direction from the first frame to the second frame. One horizontal rod can be arranged correspondingly for each row of keys. When the first frame and the second frame move along a direction toward or away from the rotating shaft mechanism together with the rotating shaft connecting piece, the horizontal rod can be driven to move along the arrangement direction of each row of keys. Furthermore, with the movement of the horizontal rod, the key can move toward the key slot or move in a direction out of the key slot. Thus, when the keyboard assembly is in a use state, the key can move along a trajectory defined in a direction out of the key slot to meet a user's use request for input by keystroke. Furthermore, when the keyboard assembly is not in use, the key can move toward the key slot.In this manner, since the portion of the key that protrudes from the key slot is relatively small, the size of the entire keyboard assembly is relatively small in the thickness direction, which helps to implement a thin design of the keyboard assembly.

[0046] In the present application, when the first frame is specifically arranged, the first frame may include a first inner frame and a first outer frame. The first outer frame is fixedly connected to the rotating shaft connecting piece. The first inner frame is located on a side of the first outer frame facing the keys. The first outer frame may be coupled to the first inner frame. During specific implementation, a first connecting rod assembly is arranged between the first inner frame and the first outer frame. The first connecting rod assembly includes a first connecting rod and a second connecting rod. One end of the first connecting rod is hinged to the first inner frame, and the other end of the first connecting rod is hinged to the first outer frame. One end of the second connecting rod is hinged to the rod body of the first connecting rod, and the other end of the second connecting rod is hinged to a mechanical part that is in a fixed position on the keyboard body. In this method, the first outer frame can be driven to move along a direction toward or away from the rotating shaft mechanism such that in the course of the rotating shaft connection piece moving along a direction toward or away from the rotating shaft mechanism, the first inner frame can be driven to move along a direction toward or away from the first outer frame.

[0047] Similarly, when the second frame is specifically arranged, the second frame may include a second inner frame and a second outer frame. The second outer frame is fixedly connected to the rotating shaft connecting piece. The second inner frame is located on a side of the second outer frame facing the keys. The second outer frame may be coupled to the second inner frame. During specific implementation, a second connecting rod assembly is arranged between the second inner frame and the second outer frame. The second connecting rod assembly includes a third connecting rod and a fourth connecting rod. One end of the third connecting rod is hinged to the second inner frame, and the other end of the third connecting rod is hinged to the second outer frame. One end of the fourth connecting rod is hinged to the rod body of the third connecting rod, and the other end of the fourth connecting rod is hinged to a mechanical part at a fixed position on the keyboard body. In this method, during the process of the rotating shaft connection piece moving along a direction toward or away from the rotating shaft mechanism, the second outer frame can be driven to move along a direction toward or away from the rotating shaft mechanism, and therefore the second inner frame can be driven to move along a direction approaching or away from the first outer frame.

[0048] In the present application, in the process in which the first outer frame and the second outer frame move along the direction toward or away from the rotating shaft mechanism with the rotation of the rotating mechanism, the first inner frame and the second inner frame can be driven to move in the same direction along the arrangement direction of each row of keys. In this method, one end of the horizontal rod can be fixedly connected to the first inner frame, and the other end of the horizontal rod can be fixedly connected to the second inner frame, so that the horizontal rod can move along the arrangement direction of each row of keys.

[0049] Furthermore, in the process of the horizontal rod moving along the arrangement direction of each row of keys, the key may move toward the key slot or move in a direction out of the key slot with the movement of the horizontal rod, so that in a possible implementation of the present application, the key may include a key cap and an up-down mechanism. The up-down mechanism may be located in the key slot. A key cap cover may be disposed on the up-down mechanism. The up-down mechanism may be configured to drive the key cap to move back and forth in a direction toward the key slot or in a direction out of the key slot. Also, a first abutment structure is disposed on the horizontal rod, and a second abutment structure is disposed on the up-down mechanism. In the process of each horizontal rod moving along the arrangement direction of the keys, the first abutment structure may be driven to press the second abutment structure of the key of the corresponding row to press the up-down mechanism against the key slot. The key slot driven by the up-down mechanism moves toward the key slot. When the pushing force between the first abutment structure and the second abutment structure is removed, the up-down mechanism may rise in a direction out of the key slot to drive the key cap to move in a direction out of the key slot.

[0050] In the present application, a plurality of key slots may be arranged on the keyboard body, and a plurality of first abutment structures may be arranged on the horizontal rod. At least one abutment structure may be accommodated in each key slot. For example, two abutment structures may be accommodated in each key slot to apply a stable pushing force to the up-down mechanism.

[0051] The force may be transferred between the first abutment structure and the second abutment structure in a surface contact manner to improve the reliability of the contact between the first abutment structure and the second abutment structure. For example, the first abutment structure may have a first inclined surface, and the second abutment structure may have a second inclined surface, and the first inclined surface and the second inclined surface may be arranged relative to each other. In this manner, when the horizontal rod moves along the arrangement direction of each row of keys, the first inclined surface may abut against the second inclined surface so that the up-down mechanism can move toward the key slot.

[0052] In a possible implementation of the present application, when the rotating shaft mechanism is specifically arranged so that it can drive the rotating shaft connecting piece to move, the rotating shaft mechanism may include a rotating assembly. The rotating assembly may include a main shaft and a connecting rod. When the main shaft rotates, the connecting rod slides along a direction toward or away from the keyboard body. In this manner, the rotating shaft connecting piece may be fixedly connected to the connecting rod. Thus, the connecting rod drives the rotating shaft connecting piece to slide along a direction toward or away from the keyboard body.

[0053] In the present application, to realize the sliding of the connecting rod, the rotating assembly may further include a fastening piece. The main shaft is rotatably connected to the fastening piece. The connecting rod is slidably connected to the fastening piece. A stop is further disposed on the main shaft. A track slot is disposed on an end surface of the stop portion facing the connecting rod. Correspondingly, the connecting rod has a connecting portion. The connecting portion is inserted into the track slot. In this manner, during the rotating process of the main shaft, the connecting portion can be driven to slide in the track slot, and push the connecting rod to slide toward or away from the keyboard body.

[0054] In addition to the above implementation, the sliding portion of the connecting rod can be further realized in another possible implementation. For example, the rotating assembly can further include a swing rod structure. The swing rod structure is arranged on the main shaft in a sleeve-like manner. In the radial direction of the main shaft, the swing rod structure is fixedly connected to the main shaft, and the swing rod structure has a protrusion. Furthermore, the connecting rod has a connection portion. A track slot is arranged on the connection portion. The track slot has a recess. In this manner, in the process of the swing rod structure rotating together with the main shaft, the protrusion can be driven to slide along the track slot. When the protrusion extends into the recess, the connecting rod can be driven to slide in the slide slot along a direction approaching or receding from the keyboard body.

[0055] According to a seventh aspect, an electronic device is provided. The electronic device includes a host and the keyboard assembly of the sixth aspect. The host can be rotatably connected to the keyboard body through a rotating shaft mechanism. In the present application, the rotating shaft mechanism can be fixedly connected to the keyboard body. By using the electronic device provided in the present application, when the electronic device is opened, the key can move along a defined trajectory in a direction out of the key slot to meet the user's usage requirements for input by keystroke. Furthermore, when the electronic device is closed, the key can move toward the key slot. In this manner, the part of the key that comes out of the key slot is relatively small, so that the size of the entire keyboard assembly is relatively small in the thickness direction, which is helpful for realizing a thin design of the keyboard assembly and for realizing a thin design of the electronic device in this state.

[0056] According to an eighth aspect, an electronic device is provided. The electronic device includes a display and the keyboard assembly of the sixth aspect. The display is rotatably connected to the keyboard body through a rotating shaft mechanism. In the present application, the rotating shaft mechanism may be fixedly connected to the keyboard body, and the rotating shaft mechanism may be a part of the keyboard assembly. Alternatively, the rotating shaft mechanism does not belong to the keyboard assembly, but is a structure of the electronic device. By using the electronic device provided in the present application, when the electronic device is opened, the key may move along a defined trajectory in the direction of exiting the key slot, and may meet the user's usage requirements for input by keystroke. Also, when the electronic device is closed, the key may move toward the key slot. In this way, the part of the key that exits the key slot is relatively small, and the size of the entire keyboard assembly is relatively small in the thickness direction, which is helpful for realizing a thin design of the keyboard assembly and for realizing a thin design of the electronic device. [Brief description of the drawings]

[0057] [Figure 1] FIG. 1 is a schematic diagram of a structure of a conventional two-in-one product according to an embodiment of the present application.

[0058] [Diagram 2] FIG. 1 is a schematic diagram of a structure of an electronic device according to an embodiment of the present application.

[0059] [Figure 3a] FIG. 2 is a schematic diagram of a structure of a keyboard assembly according to an embodiment of the present application.

[0060] [Figure 3b] 1 is a cross-sectional view of a keyboard assembly according to an embodiment of the present application.

[0061] [Figure 4a] 3A-3C are schematic diagrams of the structure of the electronic device provided in FIG. 2 in different folded states.

[0062] [Figure 4b] 3A-3C are schematic diagrams of the structure of the electronic device provided in FIG. 2 in different folded states.

[0063] [Figure 4c] 3A-3C are schematic diagrams of the structure of the electronic device provided in FIG. 2 in different folded states.

[0064] [Figure 4d] 3A-3C are schematic diagrams of the structure of the electronic device provided in FIG. 2 in different folded states.

[0065] [Figure 4e] 3A-3C are schematic diagrams of the structure of the electronic device provided in FIG. 2 in different folded states.

[0066] [Diagram 5] FIG. 2 is a schematic cross-sectional view of a structure of a keyboard assembly in a closed state according to an embodiment of the present application.

[0067] [Figure 6a] FIG. 2 is a schematic diagram of a structure of a rotating assembly according to an embodiment of the present application.

[0068] [Figure 6b] FIG. 2 is a schematic diagram of a structure of a rotating assembly according to an embodiment of the present application.

[0069] [Figure 7] FIG. 2 is an exploded view of a rotating assembly according to an embodiment of the present application.

[0070] [Figure 8a] FIG. 6b is a cross-sectional view along AA of the rotating assembly shown in FIG. 6a.

[0071] [Figure 8b] 1A-1D are cross-sectional views of a rotating assembly in different folded states according to an embodiment of the present application.

[0072] [Figure 8c] 1A-1D are cross-sectional views of a rotating assembly in different folded states according to an embodiment of the present application.

[0073] [Figure 8d] 1A-1D are cross-sectional views of a rotating assembly in different folded states according to an embodiment of the present application.

[0074] [Figure 9] FIG. 2 is a schematic diagram of a structure of a first extrusion structure according to an embodiment of the present application.

[0075] [Figure 10] FIG. 13 is a schematic diagram of a structure of a rotating assembly according to another embodiment of the present application.

[0076] [Figure 11a] FIG. 11 is a cross-sectional view taken along line BB in FIG.

[0077] [Figure 11b] FIG. 2 is a cross-sectional view of a rotating assembly in a closed state according to an embodiment of the present application.

[0078] [Figure 12] FIG. 2 is a schematic partial view of a structure of a keyboard body according to an embodiment of the present application.

[0079] [Figure 13a] FIG. 2 is a schematic partial view of the overall structure of a keyboard body according to an embodiment of the present application;

[0080] [Figure 13b] FIG. 13b is a schematic partial view of the structure of the keyboard body shown in FIG. 13a from another angle.

[0081] [Figure 14] FIG. 2 is a schematic partial view of a structure of a keyboard body according to an embodiment of the present application.

[0082] [Figure 15]15 is a schematic diagram of the structure of the keyboard body shown in FIG. 14 from another angle.

[0083] [Figure 16] 16 is an enlarged view of a partial structure of the keyboard body shown in FIG. 15.

[0084] [Figure 17] FIG. 17 is a locally enlarged view of the structure of part C in FIG. 16.

[0085] [Figure 18] 1 illustrates the relative position between the first connecting rod and the second connecting rod when the keyboard assembly is in a closed state.

[0086] [Figure 19] FIG. 2 is an enlarged view of a partial structure of a horizontal rod according to an embodiment of the present application.

[0087] [Figure 20] FIG. 2 is a schematic diagram of a structure for installing a horizontal rod on a keyboard body according to an embodiment of the present application.

[0088] [Figure 21] FIG. 2 is a schematic diagram of the structure of a lift mechanism according to an embodiment of the present application.

[0089] [Figure 22] 1 illustrates the cooperation relationship between the horizontal rods and the keys when the keyboard assembly is in an open state according to an embodiment of the present application.

[0090] [Diagram 23] 1 illustrates the cooperation between the horizontal rods and the keys when the keyboard assembly is in a closed state according to an embodiment of the present application.

[0091] [Figure 24] FIG. 2 is a schematic diagram of a structure of a rotating shaft mechanism according to an embodiment of the present application.

[0092] [Figure 25a] FIG. 2 is a schematic partial view of a structure of a keyboard assembly in a closed state according to an embodiment of the present application.

[0093] [Figure 25b] 25b is a schematic diagram of the structure of the fourth support board of the support in FIG. 25a when the keyboard assembly is in an open state; FIG.

[0094] [Figure 26] FIG. 2 is a schematic diagram of a structure of a rotating shaft mechanism according to an embodiment of the present application.

[0095] [Figure 27] FIG. 2 is a schematic diagram of the structure of a protection mechanism according to an embodiment of the present application;

[0096] [Figure 28] FIG. 28 is an exploded view of the protection mechanism shown in FIG.

[0097] [Figure 29a] 28 is a view of the protection mechanism shown in FIG. 27 in the direction D.

[0098] [Figure 29b] FIG. 29b is a view of the protection mechanism shown in FIG. 29a in the E direction.

[0099] [Figure 30a] FIG. 2 is a schematic diagram of a structure of a protection mechanism when the keyboard assembly is in an open state according to an embodiment of the present application.

[0100] [Figure 30b] FIG. 30b is a view of the protection mechanism shown in FIG. 30a in the F direction.

[0101] [Diagram 31] 1 is a cross-sectional view of a protection mechanism according to an embodiment of the present application.

[0102] [Figure 32a]FIG. 13 is a schematic diagram of a structure of a rotating assembly according to another embodiment of the present application.

[0103] [Figure 32b] FIG. 13 is a schematic diagram of a structure of a rotating assembly according to another embodiment of the present application.

[0104] [Diagram 33] FIG. 32b is an exploded view of the rotating assembly shown in FIG. 32a.

[0105] [Diagram 34] FIG. 2 is a schematic diagram of a structure of a second extrusion structure according to an embodiment of the present application.

[0106] [Diagram 35] FIG. 32b is a schematic diagram of the structure of the rotating assembly shown in FIG. 32a from another angle.

[0107] [Figure 36a] FIG. 36 is a cross-sectional view along line GG of the rotating assembly shown in FIG. 35.

[0108] [Figure 36b] 11A-11C are cross-sectional views of a rotating assembly in different folded states according to another embodiment of the present application.

[0109] [Figure 36c] 11A-11C are cross-sectional views of a rotating assembly in different folded states according to another embodiment of the present application. [Explanation of symbols]

[0110] 1:host; 2: keyboard assembly; 201: keyboard body; 2011: receptacle; 2012: key; 20121: keycap; 20122: up and down mechanism; 201221: second abutment structure; 2012211: second inclined surface; 2013: keyboard cover; 2014: rotating shaft connecting piece; 2015: frame assembly; 20151: first frame; 201511: first inner frame; 201512: first outer frame; 20152: 2nd frame;201521: 2nd inner frame;201522: 2nd outer frame;20153: horizontal rod; 201531: first abutment structure; 2015311: first inclined surface; 2016: first connecting rod assembly; 20161: a first connecting rod; 201611: a first end of the first connecting rod; 201612: a second end of the first connecting rod; 20162: second connecting rod; 201621: first end of second connecting rod; 201622: second end of second connecting rod; 2017: second connecting rod assembly; 2018: key slot; 202: support; 2021: first support board; 2021a: a first edge of a first support board; 2021b: a second edge of the first support board; 2022: a second support board; 2022a: a first edge of a second support board; 2022b: a second edge of a second support board; 2023: a third support board; 2023a: a first edge of a third support board; 2023b: a second edge of a third support board; 20231: an arc-shaped board segment; 20232: straight board segment; 20241: auxiliary support mechanism; 202411: first support rod; 202412: second support rod; 20242: slide part; 20243: slide; 20244: first slide block; 20245: second slide block; 3: rotating shaft mechanism; 301: rotating assembly; 3011: connecting piece; 30111: body part; 30112: first mounting part; 30113: second mounting portion; 30114: third mounting portion; 301141: connecting arm; 3012: first fastening piece; 30121: first open slot; 3013: second fastening piece; 30131: second open slot; 30132: second slide slot; 30133: slide portion; 301331: a first limiting portion; 3014: an intermediate connecting rod; 3015a: a first rotating shaft; 3015b: a second rotating shaft; 3015c: second rotating shaft; 3015d: fourth rotating shaft; 3016: first connecting rod; 3017: second connecting rod; 30171: third open slot; 30172: hollow area; 3018: main shaft; 30181: stop; 301811: track slot; 3019: elastic piece; 3020: regulating piece; 3021: gasket; 3022: first extrusion structure; 30221: first slot; 3023: elastic piece; 3024: third connecting rod; 30241: connecting portion; 302411: track slot; 3024111: recess; 30242: second restricting portion; 3025: fourth connecting rod; 3026: second extrusion structure; 30261: first protrusion; 3027: rotating fastening piece; 30271: lock slot; 3028: sleeve; 3029: swing rod structure; 30291: protrusion; 303: cam; 3031: cam slide slot; 304: automatic opening and closing device; 3041: motor; 3042: protection mechanism; 30421: fastening frame; 304211: first fastening plate; 304212: second fastening plate; 30422: first rotating shaft assembly; 304221: first shaft; 304222: first gear piece; 3042221: first gear structure; 3042222: second gear structure; 3042223: guide slot structure; 30422231: guide slot; 304223: assist mechanism; 30423: second rotating shaft assembly; 304231: second shaft; 304232: second gear piece; 3042321: third gear structure; 3042322: first stopper; 30423221: notch; 304233: fixing pin; 3042331: release slot; 3042332: guide structure; 304234: slide pin; 3042341: pin shaft; 3042342: second stopper; 304235: Motor connection piece; 304236: Gasket; 30424: Conversion bracket; 304241: Mounting hole; 30425: conversion bracket; 304251: fourth gear structure; 304252: accommodation cavity; 304253: elastic piece; 304254: rolling piece; 304255: pressing block; 4: Host support kit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0111] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in more detail with reference to the accompanying drawings.

[0112] An embodiment of the present application provides a keyboard assembly. In order to facilitate understanding of the keyboard assembly provided in this embodiment of the present application, the following will first describe the application scenario of the keyboard assembly. The keyboard assembly can be used in an electronic device, for example, a foldable electronic device. For example, the foldable electronic device can be, but is not limited to, a two-in-one product. The two-in-one product usually includes a host 1 and a keyboard assembly 2. FIG. 1 shows a conventional two-in-one product according to an embodiment of the present application. In this embodiment, the host 1 is detachably connected to the keyboard assembly 2. After being detached from the keyboard assembly 2, the host 1 can still be used as an independent electronic device. For example, the host 1 can be a tablet computer. In addition to the keyboard body 201 that can implement a keyboard function, the keyboard assembly 2 further includes a support part 202 as a support structure to support the host 1 and facilitate use by a user. For example, the keyboard assembly 2 can be a keyboard accessory used with a tablet computer. The keyboard assembly 2 can support the tablet computer and can also be used as a keyboard.

[0113] It can be understood that after the host 1 is installed on the keyboard assembly 2, the keyboard body 201 and the support part 202 of the keyboard assembly 2 rotate relative to each other to open or close the two-in-one product. The relative rotation between the keyboard body 201 and the support part 202 can be realized by arranging the rotating shaft mechanism 3. It can be seen from FIG. 1 that the keyboard body 201 and the support part 202 can be located on two sides of the rotating shaft mechanism 3, respectively, and rotatably connected to the rotating shaft mechanism 3.

[0114] Currently, in order to reduce operation steps such as opening, powering on, logging in, etc., in the process of a user starting up a foldable electronic device similar to a two-in-one product, the concept of automatic opening / closing has been proposed in the field. The keyboard body 201 and the support part 202 of the keyboard assembly 2 can realize relative rotation through the rotating shaft mechanism 3, so that an automatic opening / closing device for realizing the automatic opening / closing function can be disposed on the rotating shaft mechanism 3. The automatic opening / closing device usually includes a motor to drive the rotation of the rotating shaft mechanism 3 by using the motor, thereby realizing the relative rotation between the keyboard body 201 and the support part 202.

[0115] However, in response to the current development trend of lighter and thinner electronic devices, the installation space reserved for the rotating shaft mechanism 3 in the keyboard assembly 2 is becoming more and more limited. For this reason, when the automatic opening / closing device is disposed in the rotating shaft mechanism 3, it is necessary to make the size of the structure such as the motor in the automatic opening / closing device relatively small. However, if the size of the motor is too small, the torque provided by the motor for the rotation of the rotating shaft mechanism 3 is restricted.

[0116] From the above description, it can be seen that in the two-in-one product, the host 1 and the keyboard assembly 2 are in a detachable connection structure, and the weight of the host 1 is generally greater than that of the keyboard assembly 2. Therefore, when the two-in-one product is opened to a certain angle, the supporting force of the keyboard assembly 2 to the host 1 is insufficient. The two-in-one product will shake during the movement of the two-in-one product. In this case, the rotating shaft mechanism 3 may be damaged.

[0117] Furthermore, since users have individualized requirements for the angle of use of the 2-in-1 product, if the process of driving the 2-in-1 product to open or close by using a motor is manually intervened, the motor or other mechanical parts of the automatic opening and closing device may be damaged when the torque provided by the motor is insufficient.

[0118] The rotating shaft mechanism provided in the present application is intended to solve the above-mentioned problems. A protection mechanism is disposed on the automatic opening / closing device of the rotating shaft mechanism to protect the automatic opening / closing device in scenarios such as manual intervention, thereby realizing a safe and reliable automatic opening / closing function of the keyboard assembly. In this manner, the life of the keyboard assembly is extended. Furthermore, a rotating assembly is disposed on the rotating shaft mechanism to realize the hovering at any angle of the keyboard assembly and stepless adjustment of the opening / closing angle. In order to facilitate understanding of the rotating shaft mechanism provided in the present application and the keyboard assembly and electronic device in which the rotating shaft mechanism is used, the following will describe the rotating shaft mechanism, the keyboard assembly, and the electronic device in detail with reference to specific embodiments.

[0119] It should be noted that the terms used in the following embodiments are merely for describing specific embodiments and are not intended to limit the present application. The singular terms "one", "a", "the", "the foregoing", "this" and "the one" used in the present specification and claims are also intended to include expressions such as "one or more" unless otherwise specified in the context.

[0120] References to "one embodiment," "some embodiments," and the like herein indicate that one or more embodiments of the present application include a particular feature, structure, or characteristic described with reference to the embodiment. Thus, in this specification, statements such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in different parts of the specification do not necessarily mean to refer to the same embodiment, but instead mean "one or more, but not all, of the embodiments," unless otherwise emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise emphasized.

[0121] FIG. 2 is a schematic diagram of an application scenario of a rotating shaft mechanism according to an embodiment of the present application. FIG. 2 shows a foldable electronic device. The electronic device includes a host 1 and a keyboard assembly 2. The host 1 is detachably connected to the keyboard assembly 2. In the present application, the host 1 is a product with a complete structure and complete functions. After being detached from the keyboard assembly 2, the host 1 can still be used as an independent electronic device. The host 1 in the present application may include, but is not limited to, a display, a battery module, a computing and storage module, etc. In addition, the host 1 may also be equipped with a contact or connector interface that is compatible with an external device, such as a pogo pin, a USB, a type A connection interface, or a type C connection interface, to realize a wired connection between the host 1 and the external device. Alternatively, the host 1 may have a function module such as Bluetooth and Wi-Fi to realize a wireless connection between the host 1 and the external device. In the present application, the type of the host 1 is not particularly limited. The host 1 may be, but is not limited to, a tablet computer, a palmtop computer (personal digital assistant, PDA), or the like.

[0122] FIG. 3a is a schematic diagram of the structure of the keyboard assembly 2 according to an embodiment of the present application. In this embodiment, the keyboard assembly 2 is in an open state (i.e., the support portion 202 is separated from the keyboard body 201, and the keyboard body 201 is exposed to the user). The keyboard assembly 2 includes a keyboard body 201 and a support portion 202. The keyboard body 201 can provide a keyboard input function for the host 1. In addition, a control circuit, a battery, several sensors (such as an infrared sensor, an ultrasonic sensor, a fingerprint sensor, etc.) can be further arranged on the keyboard body 201. The control circuit can be arranged to provide a circuit control function for the keyboard body 201, and the sensor can be arranged to provide functions such as signal triggering. Further, the battery in the keyboard body 201 can be configured to maintain the normal operating state of the keyboard body 201 when there is no external power supply.

[0123] From the foregoing embodiments, it can be seen that the relative rotation between the keyboard body 201 and the support portion 202 can be realized by using the rotation shaft mechanism 3. Further, referring to FIG. 3a, in this embodiment, the keyboard assembly 2 further includes a rotation shaft mechanism 3, and the keyboard body 201 can be connected to the rotation shaft mechanism 3.

[0124] In the present application, the support part 202 of the keyboard assembly 2 includes a first support board 2021, a second support board 2022, and a third support board 2023. The first support board 2021, the second support board 2022, and the third support board 2023 are arranged around the rotating shaft mechanism 3. The first support board 2021 may support the host 1 shown in FIG. 2. In order to fasten the host 1 installed in the keyboard assembly 2 and the first support board 2021, in a possible implementation of the present application, a first magnetic element (not shown in FIG. 3a) may be arranged on the first support board 2021, and a second magnetic element may be arranged at a corresponding position of the host 1. The first magnetic element and the second magnetic element may be attracted to each other. In the present application, the first magnetic element may be an element with magnetic properties, or an element that does not have magnetic properties but can be attracted by an element with magnetic properties. Similarly, the second magnetic element may be an element with magnetic properties, or an element without magnetic properties but capable of being attracted by an element with magnetic properties. The first magnetic element and the second magnetic element can be attracted to each other and fastened.

[0125] Still referring to FIG. 3a, the first support board 2021 has a first edge 2021a and a second edge 2021b disposed opposite to each other. The first edge 2021a of the first support board 2021 is disposed toward the rotating shaft mechanism. The first edge 2021a may be fixedly connected to the host support kit 4. The first support board 2021 may rotate around the rotating shaft mechanism. Referring to FIG. 2 and FIG. 3a, the host support kit 4 may be configured to support the host 1. Furthermore, an arc surface may be disposed on the host support kit 4. After the host 1 is installed on the host support kit 4, the frame of the host 1 may be clamped to the arc surface to realize the attachment and fastening between the host support kit 4 and the frame of the host 1. This helps to realize the fastening between the host 1 and the first support board 2021 to reduce the risk of the host 1 falling off the first support board 2021. It can be understood that in the present application, a connector interface, contact, etc. can be further disposed on the host support kit 4, and the connector interface or contact can be conducted to the control circuit in the keyboard body 201 through a lead wire. In this manner, when the host 1 is installed on the keyboard assembly 2, the contact or connector interface of the host 1 can be connected to the corresponding contact or connector interface of the host support kit 4 to realize the electrical connection between the host 1 and the keyboard assembly 2, so that the host 1 can be operated and controlled by using the keyboard body 201. It should be noted that in the present application, the lead wire connecting the host support kit 4 and the control circuit of the keyboard body 201 can be hidden in the rotating shaft mechanism 3 so that the lead wire is protected.

[0126] FIG. 3b is a cross-sectional view of a keyboard assembly according to an embodiment of the present application. In the present application, the second support board is located between the first support board 2021 and the third support board 2023. The second support board 2022 may include a first edge 2022a and a second edge 2022b arranged opposite each other. The first edge 2022a of the second support board 2022 is hinged to a surface of the first support board 2021 that is remote from the keyboard body 201. In this case, the second support board 2022 can rotate relative to the first support board 2021. Furthermore, the third support board 2023 includes a first edge 2023a and a second edge 2023b arranged opposite each other. The second edge 2022b of the second support board 2022 is hinged to the first edge 2023a of the third support board 2023.

[0127] Still referring to Fig. 3b, in the embodiment shown in Fig. 3b, the keyboard assembly 2 is in an open state, and the parts of the first support board 2021, the second support board 2022 and the third support board 2023 that are arranged around the rotating shaft mechanism 3 form a triangular support structure. In this way, in the process of opening and closing the keyboard assembly 2 (i.e., the support part 202 approaches the keyboard body 201, and the keyboard body 201 is covered by a part of the support part 202), the triangular support structure can realize a stable support for the host 1 shown in Fig. 2, and further realize a relative rotation process between the support part 202 and the keyboard body 201 of the keyboard assembly 2. Therefore, the structure of the keyboard assembly 2 is relatively reliable.

[0128] FIG. 4a is a schematic diagram of the structure of the electronic device provided in FIG. 2 in a closed state according to the present application. From FIG. 4a, it can be seen that when the electronic device is in a closed state, the host 1 is attached to the keyboard body 201, and at least a part of the second support board 2022 and the first support board 2021 covers the host 1 so as to protect the host 1. Furthermore, in the present application, the third support board 2023 includes an arc-shaped board segment 20231 and a straight board segment 20232. The radian of the arc-shaped board segment 20231 can be designed based on the outer shape of the rotating shaft mechanism 3. In this way, when the electronic device is in a closed state, the arc-shaped board segment 20231 can cover the rotating shaft mechanism 3 to protect the rotating shaft mechanism 3. Furthermore, the appearance aesthetics of the keyboard assembly 2 can be improved.

[0129] By using the electronic device provided in the present application, when the electronic device needs to be opened from a closed state, a force F away from the keyboard body 201 can be applied to the host 1 and the first support board 2021. Figures 4b to 4e are schematic diagrams of the structure of the electronic device opened at different angles. From Figures 4b to 4e, it can be seen that in the process of opening the electronic device, the first support board 2021 drives the second support board 2022 to rotate in a direction away from the keyboard body 201, and the second support board 2022 drives the third support board 2023 to rotate in a direction away from the keyboard body 201, so that the third support board 2023 is disengaged from the rotating shaft mechanism 3.

[0130] Further, still referring to FIG. 4a-FIG. 4e, in the process of opening the electronic device, the parts of the first support board 2021, the second support board 2022 and the third support board 2023 arranged around the rotating shaft mechanism 3 form a triangular support structure. The triangular support structure can effectively improve the movement stability of the electronic device. It can be seen that in the process of the electronic device changing from an open state to a closed state, the first support board 2021, the second support board 2022 and the third support board 2023 all move toward the keyboard body 201. In this process, the triangular support structure can also provide a stable support for the movement of the electronic device.

[0131] 5 is a schematic cross-sectional view of the structure of the keyboard assembly in a closed state according to the present application. From the description of the above embodiment, it can be seen that in the process of changing the keyboard assembly from an open state to a closed state, the third support board 2023 moves in a direction toward the keyboard body 201. In the present application, the receptacle 2011 can be disposed in the keyboard body 201, and the opening of the receptacle 2011 is provided toward the third support board 2023. In this manner, when the keyboard assembly 2 is in the closed state shown in FIG. 5, at least a part of the straight board segment 20232 of the third support board 2023 can be accommodated in the receptacle 2011 to improve the unity of the appearance of the keyboard assembly 2. Furthermore, in some embodiments of the present application, the second edge 2023b of the third support board 2023 shown in FIG. 3b may alternatively always be located in the receptacle 2011, and the third support board 2023 may slide in the receptacle 2011, so that the receptacle 2011 may guide the sliding of the third support board 2023. In order to improve the movement stability of the third support board 2023, in some other embodiments of the present application, a sliding portion (not shown in FIG. 5) may be disposed on the side wall of the receptacle 2011; a sliding block structure (not shown in FIG. 5) may be disposed on the third support board 2023, and the sliding block structure may move along the sliding portion so as to reduce the shaking of the third support board 2023 in the movement process, thereby improving the movement stability of the entire keyboard assembly 2.

[0132] From the description of the above embodiment, it can be seen that the rotating shaft mechanism 3 plays an important role in the movement process from the open state to the closed state and from the closed state to the open state of the keyboard assembly 2. In order to understand the implementation of the movement of the keyboard assembly 2 provided in the present application, the specific arrangement method of the rotating shaft mechanism 3 will be described in detail below with reference to the drawings.

[0133] It can be understood that the rotating assembly can be normally disposed on the rotating shaft mechanism 3 so that the keyboard body 201 and the support part 202 of the keyboard assembly 2 can be maintained at any folding angle that meets the personal use conditions of the user. Therefore, in the process of switching the folding mode of the keyboard assembly 2, the rotating assembly can provide a reliable damping force for the entire keyboard assembly 2, thereby realizing stable support for the host 1. In the present application, the folding angle between the keyboard body 201 and the support part 202 is the included angle between the surface of the keyboard body 201 facing the support part 202 and the surface of the support part 202 facing the keyboard body 201 in the process of changing the keyboard assembly 2 from the open state to the closed state and from the closed state to the open state.

[0134] Fig. 6a is a schematic diagram of the structure of the rotating assembly according to an embodiment of the present application. Fig. 6a is a schematic diagram of the structure of the rotating assembly 301 when the keyboard assembly 2 is in a closed state. Furthermore, Fig. 6b is a schematic diagram of the structure of the rotating assembly 301 when the keyboard assembly 2 is in an open state.

[0135] 6a and 6b, in this embodiment, the rotating assembly 301 may include a connection piece 3011, a first fastening piece 3012, and a second fastening piece 3013. The first fastening piece 3012 and the second fastening piece 3013 may be fixedly connected to the keyboard body 201 shown in FIG. 5. The connection method may be, but is not limited to, a tight connection using fasteners such as screws. Furthermore, the first fastening piece 3012 and the second fastening piece 3013 may function as a support kit for the entire rotating assembly 301. The first fastening piece 3012 and the second fastening piece 3013 are spaced apart. Other structures of the rotating assembly 301 may be directly or indirectly connected to the first fastening piece 3012 and the second fastening piece 3013.

[0136] For easy understanding of the connection relationship between the structures of the rotating assembly 301, please refer to FIG. 7. FIG. 7 is an exploded view of the rotating assembly 301 shown in FIG. 6a and FIG. 6b. In this embodiment, the connecting piece 3011 includes a body portion 30111 arranged in a long-strip structure. The body portion 30111 can be fixedly connected to the host support kit 4 shown in FIG. 3b. The connection method can be, but is not limited to, a tight connection by using fasteners such as screws. Still referring to FIG. 7, the body portion 30111 has a first edge. A first mounting portion 30112 and a second mounting portion 30113 are arranged on a first side. The first mounting portion 30112 and the second mounting portion 30113 are spaced apart. Furthermore, the body portion 30111 has a first surface and a second surface arranged opposite to each other. The first surface can be configured to be fixedly connected to the host support kit 4. A first edge of the first support board 2021 is fixedly connected to the host support kit 4, so that the first support board 2021 can be fixedly connected to the first surface of the body part 30111 via the host support kit 4. The first mounting portion 30112 and the second mounting portion 30113 can extend in a direction away from the second surface. The first mounting portion 30112 can have a first mounting slot. The second mounting portion 30113 can have a second mounting slot. Still referring to FIG. 7, the third mounting portion 30114 can be further disposed on the first edge of the body part 30111. The third mounting portion 30114 is located on the body part 30111. The body part 30111 further has a second edge. The first edge and the second edge are disposed opposite each other. The third mounting portion 30114 may include two connecting arms 301141 disposed relative to one another. The two connecting arms 301141 extend in a direction from a first edge to a second edge of the body portion 30111.

[0137] 6a, 6b and 7, in the present application, the first fastening piece 3012 and the second fastening piece 3013 are located on the same side of the connecting piece 3011. The rotating assembly 301 may further include a connecting rod assembly. The connecting rod assembly includes an intermediate connecting rod 3014. There are two intermediate connecting rods 3014. A first open slot 30121 is disposed on the side of the first fastening piece 3012 facing the connecting piece 3011. A second open slot 30131 is disposed on the side of the second fastening piece 3013 facing the connecting piece 3011. The intermediate connecting rod 3014 includes a first end and a second end disposed opposite each other. A first end of one intermediate connecting rod 3014 is installed in the first installation slot of the first installation part 30112, and a second end of the intermediate connecting rod 3014 is installed in the first open slot 30121 of the first fastening piece 3012. In addition, the first end of the intermediate connecting rod 3014 is rotatably connected to the slot wall of the first installation slot through a first rotating shaft 3015a, and the second end of the intermediate connecting rod 3014 is rotatably connected to the first open slot 30121 of the first fastening piece 3012 through a second rotating shaft 3015b. To realize the rotatable connection between the first end of the intermediate connecting rod 3014 and the slot wall of the first installation slot, the first rotating shaft 3015a can be fixedly connected to the first end of the first connecting rod, and the first rotating shaft 3015a can be rotatably connected to the slot wall of the first installation slot. In the rotatable connection method, the mounting holes can be arranged on two opposite slot walls of the first installation slot, and each of the two ends of the intermediate connecting rod 3014 is inserted into one of the mounting holes. In some other embodiments of the present application, the first rotating shaft 3015a can be further fixedly connected to the slot wall of the first installation slot, and the first end of the intermediate connecting rod 3014 can rotate around the first rotating shaft 3015a. Furthermore, in this embodiment, the second end of the intermediate connecting rod 3014 can be rotatably connected to the slot wall of the first open slot 30121 of the first fastening piece 3012 through the second rotating shaft 3015b. The second rotating shaft 3015b can be, but is not limited to, a pin shaft.In this application, the setting of the rotation connection method of the two machine parts can be referred to as the method of rotatably connecting the first end of the intermediate connecting rod 3014 to the slot wall of the first installation slot through the first rotating shaft 3015a. In the following embodiments, the details will not be described.

[0138] Similarly, the first end of the other intermediate connecting rod 3014 can be installed in the second installation slot of the second installation portion 30113 of the connecting piece 3011, and rotatably connected to the slot wall of the second installation slot through the first rotating shaft 3015a. The second end of the intermediate connecting rod 3014 can be installed in the second open slot 30131 of the second fastening piece 3013, and rotatably connected to the slot wall of the second open slot 30131 through the second rotating shaft 3015b. Furthermore, in this embodiment, the second end of the intermediate connecting rod 3014 can be rotatably connected to the slot wall of the second open slot 30131 of the second fastening piece 3013 through the second rotating shaft 3015b. The second rotating shaft 3015b can be, but is not limited to, a pin shaft.

[0139] Still referring to Fig. 6a, Fig. 6b and Fig. 7, in the present application, the connecting rod assembly may further include a first connecting rod 3016 and a second connecting rod 3017. The first connecting rod 3016 includes a first end and a second end arranged opposite to each other. The first end of the first connecting rod 3016 may be mounted on the third mounting portion 30114 of the connecting piece 3011. The first end of the first connecting rod 3016 is located between the two connecting arms 301141. Furthermore, the first end of the first connecting rod 3016 is rotatably connected to the two connecting arms 301141 via a third rotating shaft 3015c. Furthermore, the second end of the first connecting rod 3016 is rotatably connected to the second connecting rod 3017 via a fourth rotating shaft 3015d. The third open slot 30171 may be disposed at an end of the second connecting rod 3017 configured to connect to the first connecting rod 3016. The second end of the first connecting rod 3016 may be installed in the third open slot 30171, and the second end of the first connecting rod 3016 is rotatably connected to the slot wall of the third open slot 30171 via the fourth rotating shaft 3015d, so that the connecting structure formed by the first connecting rod 3016 and the second connecting rod 3017 is relatively compact.

[0140] Further, a first slide slot (not shown in FIG. 7) is arranged on an end surface of a side of the first fastening piece 3012 facing the second fastening piece 3013, and a second slide slot 30132 is arranged on an end surface of a side of the second fastening piece 3013 facing the first fastening piece 3012. One end of the third rotating shaft 3015c can be inserted into the first slide slot and slide along the first slide slot, and the other end of the third rotating shaft 3015c can be inserted into the second slide slot 30132 and slide along the second slide slot 30132. It can be understood that the connecting rod assembly can slide along the first slide slot and the second slide slot 30132.

[0141] In the present application, the movement trajectory of the third rotating shaft 3015c can be set by designing the specific shapes of the first sliding slot and the second sliding slot 30132. Furthermore, since the first end of the first connecting rod 3016 is rotatably connected to the connecting piece 3011 via the third rotating shaft 3015c, in the process of the third rotating shaft 3015c moving along the defined movement trajectory, the connection between the second end of the first connecting rod 3016 and the connecting piece 3011 can move according to the defined movement trajectory.

[0142] For example, Fig. 8a is a cross-sectional view along AA of the rotating assembly 301 shown in Fig. 6a. Fig. 8a shows the position of the third rotating shaft 3015c in the second sliding slot 30132 when the keyboard assembly 2 is in a closed state, that is, when the included angle between the surface of the keyboard body 201 facing the support part 202 and the surface of the support part 202 facing the keyboard body 201 is about 0°. In the state shown in Fig. 8a, the third rotating shaft 3015c is located at the highest point of the second sliding slot 30132. Furthermore, when the rotating assembly 301 is used for the keyboard assembly 2, in the state shown in Fig. 8a, the third rotating shaft 3015c is located at the end of the second sliding slot 30132 that is the farthest end from the keyboard body 201.

[0143] In the process of moving the keyboard assembly 2 from the closed state to the open state, the third rotating shaft 3015c can slide along the second slide slot 30132. FIG. 8b shows the position of the third rotating shaft 3015c in the second slide slot 30132 when the keyboard assembly 2 is in an intermediate state from the closed state to the open state. In the state shown in FIG. 8b, the included angle between the surface of the keyboard body 201 facing the support part 202 and the surface of the support part 202 facing the keyboard body 201 can be about 45°. Comparing FIG. 8a and FIG. 8b, it can be seen that in the process of opening the keyboard assembly 2, the third rotating shaft 3015c slides along the second slide slot 30132 in a direction toward the keyboard body.

[0144] When the keyboard assembly continues to open in the state shown in FIG. 8b, please refer to FIG. 8c. FIG. 8c shows the position of the third rotating shaft 3015c in the second sliding slot 30132 when the included angle between the surface of the keyboard body 201 facing the support part 202 and the surface of the support part 202 facing the keyboard body 201 is about 110°. Also refer to FIG. 8d. FIG. 8d shows the position of the third rotating shaft 3015c in the second sliding slot 30132 when the included angle between the surface of the keyboard body 201 facing the support part 202 and the surface of the support part 202 facing the keyboard body 201 is maximum (e.g., about 130°). In this case, the third rotating shaft 3015c is located at the end of the second sliding slot 30132 that is closest to the keyboard body 201. From FIGS. 8a to 8d, in the present application, the movement trajectory of the connecting piece 3011 can be set by designing the shape of the second sliding slot 30132.

[0145] 6a, 6b and 7, in the present application, the rotating assembly 301 may further include a main shaft 3018, which may pass through the first fastening piece 3012, the second connecting rod 3017 and the second fastening piece 3013 in sequence. The main shaft 3018 is rotatably connected to the first fastening piece 3012 and the second fastening piece 3013. The main shaft 3018 may rotate relative to the first fastening piece 3012 and the second fastening piece 3013. Furthermore, in the radial direction of the main shaft 3018, the second connecting rod 3017 and the main shaft 3018 are fastened to each other. In this case, the second connecting rod 3017 and the main shaft 3018 may rotate synchronously around the axis of the main shaft 3018. In a possible embodiment of the present application, an irregular hole may be arranged in the second connecting rod 3017 to relatively fasten the second connecting rod 3017 and the main shaft 3018 in the radial direction. For example, the irregular hole may be a D-shaped hole, but is not limited thereto. Furthermore, a part of the main shaft 3018 that penetrates the second connecting rod 3017 is also set to an irregular section that can fit the irregular hole to realize the radial restraint of the second connecting rod 3017 and the main shaft 3018.

[0146] Furthermore, a stop portion 30181 may be further disposed at an end of the main shaft 3018 located on the second fastening piece 3013 and away from the first fastening piece 3012 to restrain the main shaft 3018 in the axial direction and reduce axial fluttering of the main shaft 3018, thereby improving the movement stability of the entire rotating assembly 301.

[0147] In the present application, in order that the rotating assembly 301 can provide a damping force to the rotating shaft mechanism at a corresponding rotation position during the forward movement process of the entire rotating shaft mechanism to hold the rotating shaft mechanism at a corresponding rotation position, still referring to FIG. 7, in a possible embodiment of the present application, an elastic piece 3019 can be further arranged on the rotating assembly 301, and the elastic piece 3019 can accumulate an elastic force when pressed. As shown in FIG. 7, the elastic piece 3019 can be arranged on a side of the first fastening piece 3012 and away from the second fastening piece 3013. The specific arrangement form of the elastic piece 3019 is not limited in the present application. For example, the elastic piece 3019 can include an elastic pad. There may be one or more elastic pads. When the elastic piece 3019 includes multiple elastic pads, the multiple elastic pads can be arranged in a stacked manner. Further, referring to FIG. 7, the elastic piece 3019 can be arranged on the main shaft 3018 in a sleeve-like manner. In this embodiment, when the elastic piece 3019 is pressed, the elastic piece 3019 generates an elastic force along the axial direction of the main shaft 3018 .

[0148] In addition, in order to prevent the elastic piece 3019 from falling off the main shaft 3018, a restricting piece 3020 may be further arranged on a side of the elastic piece 3019 away from the first fastening piece 3012. For example, the restricting piece 3020 may be a nut. The restricting piece 3020 is arranged on the main shaft 3018 in a sleeve-like manner. The elastic piece 3019 is restricted along the axial direction of the main shaft 3018. Furthermore, in the present application, a group of gaskets 3021 may be further arranged to apply an effective force to the elastic piece 3019. The group of gaskets 3021 is arranged on the main shaft 3018 in a sleeve-like manner. The elastic piece 3019 is arranged between the group of gaskets 3021. In addition, the outer diameter of the gasket 3021 may be greater than or equal to the outer diameter of the elastic piece 3019. The restricting piece 3020 can come into contact with a gasket 3021 located on a side of the elastic piece 3019 away from the first fastening piece 3012 .

[0149] It should be noted that in the present application, the elastic piece 3019 may deform along the axial direction of the main shaft 3018. The elastic force generated by the deformation of the elastic piece 3019 may be applied to the first fastening piece 3012 to generate a friction force between the first fastening piece 3012 and the elastic piece 3019. This friction force may impede the rotation of the main shaft 3018. Furthermore, the second connecting rod 3017 and the main shaft 3018 may rotate synchronously. The second connecting rod 3017 may drive the connecting piece 3011 to rotate. The connecting piece 3011 is fixedly connected to the host support kit 4 fastened to the first support board 2021 shown in FIG. 3b. Therefore, when the second connecting rod 3017 is impeded with the rotation of the main shaft 3018, the movement of the first support board 2021 is impeded. In this manner, the elastic force generated by the elastic piece 3019 is converted into a damping force that impedes the rotation of the rotating shaft mechanism.

[0150] It can be understood that the host 1 can be fastened to the first support board 2021. When the host 1 reaches a certain rotation position in the rotation process of the first support board 2021, if the torque generated by the gravity of the host 1 is equal to the torque generated by the damping force of the rotating shaft mechanism, the first support board 2021 can hover at the corresponding rotation position without external force.

[0151] Because the rotating shaft mechanism requires different damping forces at different rotation positions, the change in damping force can be realized by changing the elastic force generated by the elastic piece 3019. The change in the elastic force of the elastic piece 3019 can be realized by changing the deformation of the elastic piece 3019. In a possible embodiment of the present application, a cam contact surface can be disposed between the first fastening piece 3012 and the elastic piece 3019, so that the elastic piece 3019 has corresponding deformation at different rotation positions. During specific implementation, still referring to FIG. 7, a first extrusion structure 3022 is disposed between the elastic piece 3019 and the first fastening piece 3012. The first extrusion structure 3022 is disposed on the main shaft 3018 in a sleeve-like manner. The elastic piece 3019 can press the first extrusion structure 3022 toward the first fastening piece 3012, so that the first extrusion structure 3022 abuts against the first fastening piece 3012 under the elastic force of the elastic piece 3019. Furthermore, in the radial direction of the main shaft 3018, the first extrusion structure 3022 and the main shaft 3018 are fastened to each other, and the first extrusion structure 3022 can rotate synchronously with the main shaft 3018. A deformed hole may be disposed in the first extrusion structure 3022. For example, the deformed hole may be, but is not limited to, a D-shaped hole. Furthermore, a portion of the main shaft 3018 that passes through the first cam mechanism 3022 is also set to a deformed section corresponding to the deformed hole to realize the restriction of the first extrusion structure 3022 and the main shaft 3018 in the radial direction.

[0152] FIG. 9 is a schematic diagram of the structure of the first extrusion structure according to an embodiment of the present application. A first slot 30221 is disposed on an end surface of the first extrusion structure 3022 facing the first fastening piece 3012. The first slot 30221 has a plurality of segments, for example, four segments as shown in FIG. 9. Furthermore, the first slot 30221 may be disposed in a circular arc shape. The radii of the circle on which the plurality of segments of the first slot 30221 are located may be different. In order for the first extrusion structure 3022 to cooperate with the end surface of the first fastening piece 3012, in the present application, a first protrusion (not shown) may be disposed on the end surface of the first fastening piece 3012 facing the first extrusion structure 3022. The first protrusion also has a plurality of segments. The plurality of segments of the first protrusion are disposed in one-to-one correspondence with the plurality of segments of the first slot 30221. In some other embodiments of the present application, the first slot 30221 may also be disposed on an end face of the first fastening piece 3012 that faces the first extrusion structure 3022, and the first protrusion may be disposed on an end face of the first extrusion structure 3022 that faces the second fastening piece.

[0153] When the correspondingly arranged first protrusion falls into the first slot 30221 so that the first slot 30221 cooperates with the first protrusion and is clamped by the first protrusion, the total length of the first extrusion structure 3022 and the first fastening piece 3012 in the axial direction of the main shaft 3018 is minimum. In this case, the extrusion force on the elastic piece 3019 is minimum, and the deformation amount of the elastic piece 3019 is minimum, so that the elastic force generated by the elastic piece 3019 is minimum. Therefore, the friction force between the first extrusion structure 3022 and the first fastening piece 3012 is minimum. After the first extrusion structure 3022 rotates relative to the first fastening piece 3012, when the first slot 30221 is misaligned with the first protrusion, the total length of the first extrusion structure 3022 and the first fastening piece 3012 in the axial direction of the main shaft 3018 increases, thereby increasing the deformation amount of the elastic piece 3019 to accumulate elastic force. Under the elastic force, the friction force between the first extrusion structure 3022 and the first fastening piece 3012 increases, thereby increasing the damping force of the rotating shaft mechanism.

[0154] In the present application, by appropriately designing the first slot 30221 and the first protrusion, the damping force of the rotating shaft mechanism 3 is maximum when the corresponding keyboard assembly 2 is in a closed state, so that the keyboard assembly 2 can be stably held in a closed state.

[0155] Still referring to FIG. 7, in the present application, an elastic piece 3023 may be further disposed on the rotating assembly 301. The elastic piece 3023 may be, for example, a torsion spring. Furthermore, FIG. 10 is a schematic diagram of the structure of the rotating assembly 301 corresponding to FIG. 6b from another angle. From FIG. 10, a hollow area 30172 may be disposed on the second connecting rod 3017, and the elastic piece 3023 may be hidden in the hollow area 30172. In this embodiment, the elastic piece 3023 is disposed on the main shaft 3018 in a sleeve-like manner. Furthermore, since the main shaft 3018 can rotate relative to the first fastening piece 3012 and the second fastening piece 3013, and the second connecting rod 3017 can rotate synchronously with the main shaft 3018, in the present application, one end of the elastic piece 3023 can be fastened to the first fastening piece 3012 or the second fastening piece 3013, and the other end of the elastic piece 3023 can be fastened to the second connecting rod 3017 or the main shaft 3018. In this manner, in the process of the second connecting rod 3017 rotating together with the main shaft 3018, the elastic piece 3023 can generate elastic deformation, thereby generating an elastic force in the direction around the main shaft. Therefore, with a suitable design, the elastic force generated by the elastic piece 3023 can provide an auxiliary force for the rotation of the second connecting rod 3017 and the main shaft 3018. Therefore, when a relatively small force is applied to the connecting piece 3011 shown in FIG. 7, the second connecting rod 3017 and the main shaft 3018 can be driven to rotate, and using the rotating assembly 301 improves the user's comfort when opening or closing the keyboard assembly 2.

[0156] Still referring to Fig. 7, the rotating assembly 301 further includes a third connecting rod 3024, which can slide along the second fastening piece 3013. Further referring to Fig. 10, a sliding portion 30133 is disposed on a side of the second fastening piece 3013 away from the second open slot 30131 shown in Fig. 7, and the third connecting rod 3024 can be received within the sliding portion 30133 and can slide along the sliding portion 30133.

[0157] In some embodiments of the present application, in order to prevent the third connecting rod 3024 from falling off the slide portion 30133, still referring to FIG. 7 and FIG. 10, the rotating assembly 301 may further include a fourth connecting rod 3025. At least a part of the fourth connecting rod 3025 is located on a side of the third connecting rod 3024, away from the second open slot 30131. The fourth connecting rod 3025 is fixedly connected to the second fastening piece 3013. Therefore, the third connecting rod 3024 is restrained in the slide portion 30133 by using the fourth connecting rod 3025, which improves the movement reliability of the third connecting rod 3024.

[0158] In addition, in order to realize the sliding of the third connecting rod 3024 in the sliding part 30133 during the rotation process of the rotating assembly 301, it can be seen from FIG. 7 that the side of the third connecting rod 3024 facing the second fastening piece 3013 has a connecting part 30241. Since other structures of the rotating assembly 301 can rotate together with the main shaft 3018, in this application, the third connecting rod 3024 can be connected to the main shaft 3018 through the connecting part 30241. For specific implementation, please refer to FIG. 11a. FIG. 11a is a cross-sectional view along BB in FIG. 10. From the description of the above embodiment, the stop part 30181 is disposed on the side of the main shaft 3018, located on the second fastening piece 3013, and away from the first fastening piece 3012. 7 and 11a, a track slot 301811 may be disposed on an end surface of the stop portion 30181 facing the third connecting rod 3024, and the connecting portion 30241 of the third connecting rod 3024 may be inserted into the track slot 301811. In this manner, the connecting portion 30241 of the third connecting rod 3024 may slide along the track slot 301811 during the rotation process of the main shaft 3018.

[0159] It can be seen that the movement trajectory of the third connecting rod 3024 can be designed by appropriately designing the track slot 301811. For example, when the rotating assembly 301 is in the open state shown in FIG. 11a, the third connecting rod 3024 can be hidden in the second fastening piece 3013. Further, refer to FIG. 11b. FIG. 11b shows the relative positional relationship between the third connecting rod 3024 and the stop 30181 when the rotating assembly 301 is in the closed state shown in FIG. 11b. When the rotating assembly 301 is in the closed state shown in FIG. 11b, the third connecting rod 3024 can extend out of the second fastening piece 3013. For example, when the rotating assembly 301 is used in the keyboard assembly 2 shown in FIG. 3a, in the process of the keyboard assembly 2 switching from the open state to the closed state, the third connecting rod 3024 can slide in a direction toward the keyboard body 201. Conversely, in the process of switching the keyboard assembly 2 from a closed state to an open state, the third connecting rod 3024 can slide in a direction away from the keyboard body 201. In some other embodiments of the present application, when the rotating assembly 301 is used in the keyboard assembly 2, in the process of switching the keyboard assembly 2 from an open state to a closed state, the third connecting rod 3024 can alternatively slide in a direction away from the keyboard body 201. Conversely, in the process of switching the keyboard assembly 2 from a closed state to an open state, the third connecting rod 3024 can slide in a direction toward the keyboard body 201.

[0160] From the description of the above embodiment, it can be seen that the keyboard body 201 of the keyboard assembly 2 can be configured to realize a keyboard input function. A key 2012 can be disposed on the keyboard body 201. FIG. 12 is a schematic partial view of the structure of the keyboard body 201 according to a possible embodiment of the present application. The keyboard body 201 can further include a keyboard cover 2013. The keyboard cover 2013 can protect the internal structure of the keyboard body 201. The key 2012 can come out of the keyboard cover 2013. Generally, the key 2012 can protrude from the surface of the keyboard cover 2013 to realize the function of the key 2012 by hitting the key 2012. However, when the keyboard assembly 2 is in a closed state, the key 2012 is in an unused state. In this case, the key 2012 does not need to protrude from the surface of the keyboard cover 2013. Based on this, the present application provides a solution in which the key 2012 of the keyboard body 201 can move up and down with the rotation of the rotating shaft mechanism. Therefore, when the keyboard assembly 2 is in an open state, the keys 2012 rise and protrude from the surface of the keyboard cover 2013 of the keyboard body 201. However, when the keyboard assembly 2 is in a closed state, the keys 2012 fall and are hidden by the keyboard body 201, reducing the thickness of the keyboard assembly 2 in the closed state. In this manner, it meets the requirement of a thin design of an electronic device and avoids traces on the display when the keyboard body 201 is attached to the display of the electronic device in a closed state, thereby improving the user's usage experience.

[0161] In a specific implementation, FIG. 13a is a schematic diagram of the overall structure of the keyboard body 201 according to the present application. The structures such as the key 2012 and the key cover 2013 shown in FIG. 12 are omitted in FIG. 13a to show the connection relationship between the rotating shaft mechanism 3 and the keyboard body 201. From FIG. 13a, it can be seen that the rotating shaft connecting piece 2014 can be disposed at the end of the keyboard body 201, which is close to the rotating shaft mechanism 3. The rotating shaft connecting piece 2014 can be disposed in a long strip structure, but is not limited thereto. The length direction of the rotating shaft connecting piece 2014 can be the same as the axial direction of the main shaft 3018 of the rotating assembly 301.

[0162] From the description of the rotating assembly 301 of the rotating shaft mechanism 3 in the above embodiment, it can be seen that the rotating assembly 301 includes a third connecting rod 3024 that can slide along a direction toward or away from the keyboard body 201. In the present application, the rotating shaft connecting piece 2014 can be fixedly connected to the third connecting rod 3024, so as to drive the rotating shaft connecting piece 2014 to move along a direction toward or away from the rotating shaft mechanism 3 during the sliding process of the third connecting rod 3024. It can be understood that in the present application, when the third connecting rod 3024 slides along a direction toward the keyboard body 201, the rotating shaft connecting piece 2014 can be driven to move in a direction away from the rotating shaft mechanism 3; when the third connecting rod 3024 slides in a direction away from the keyboard body 201, the rotating shaft connecting piece 2014 can be driven to move in a direction toward the rotating shaft mechanism 3;

[0163] In the present application, it should be understood that a plurality of rotating assemblies 301 may be arranged in the rotating shaft mechanism 3 to improve the movement stability of the rotating shaft connecting piece 2014. For example, in the embodiment shown in FIG. 13a, two rotating assemblies 301 may be arranged in the rotating shaft mechanism 3, and the two rotating assemblies 301 may be arranged at two ends in the length direction of the rotating shaft mechanism 3. In this manner, the third connecting rods 3024 of the two rotating assemblies 301 may be fixedly connected to the rotating shaft connecting piece 2014 together, and the two third connecting rods 3024 move synchronously in the same direction by suitable arrangement to drive the rotating shaft connecting piece 2014 to move, thereby improving the movement reliability of the rotating shaft connecting piece 2014 and improving the movement stability of the entire keyboard body 2.

[0164] Further, please refer to Fig. 13b. Fig. 13b is a schematic diagram of the structure of the keyboard body shown in Fig. 13a from another angle. The keyboard body 201 may further include a frame assembly 2015. The frame assembly 2015 includes a first frame 20151, a second frame 20152, and a horizontal rod 20153. In the axial direction of the main shaft 3018 of the rotating assembly 301 of the rotating shaft mechanism 3, the first frame 20151 and the second frame 20152 are arranged relative to each other, and the first frame 20151 and the second frame 20152 are both fixedly connected to the rotating shaft connecting piece 2014. The connecting method may be, but is not limited to, a tight connection by using a fastener such as a screw. In this manner, when the rotating shaft connecting piece 2014 moves together with the third connecting rod 3024, the first frame 20151 and the second frame 20152 can be driven to move synchronously with the rotating shaft connecting piece 2014.

[0165] FIG. 14 is a schematic partial view of the structure obtained after the keyboard cover 2013 of the keyboard body 201 shown in FIG. 12 is removed. From FIG. 14, it can be seen that the keys 2012 are located between the first frame 20151 and the second frame 20152. Furthermore, in this application, the keys 2012 may be in multiple rows arranged in parallel. Each row of the keys 2012 includes multiple keys 2012. Each row of the keys 2012 is arranged in the direction from the first frame 20151 to the second frame 20152.

[0166] FIG. 15 is a schematic diagram of the structure of the keyboard body 201 shown in FIG. 14 from another angle. In this embodiment, there are multiple horizontal rods 20153. One horizontal rod 20153 is arranged corresponding to each row of the keys 2012. The length direction of the horizontal rods 20153 is the same as the arrangement direction of each row of the keys 2012. Furthermore, the horizontal rods 20153 may be arranged on the side of the correspondingly arranged keys 2012 facing the rotating shaft mechanism 3 shown in FIG. 13a, or on the side of the correspondingly arranged keys 2012 away from the rotating shaft mechanism 3. This is not specifically limited in the present application.

[0167] In this application, the first frame 20151 and the second frame 20152 can drive the horizontal rod 20153 to move in the length direction of the horizontal rod 20153. Please refer to FIG. 16 for specific implementation. FIG. 16 is an enlarged view of the partial structure of the keyboard body 201 shown in FIG. 15. In this application, the first frame 20151 includes a first inner frame 201511 and a first outer frame 201512, and the first inner frame 201511 and the first outer frame 201512 are arranged side by side, and the first inner frame 201511 is located at the side of the first outer frame 201512 and faces the key 2012. Further, the first outer frame 201512 is configured to be fixedly connected to the rotating shaft connecting rod 2014 shown in FIG. 13a, and the first inner frame 201511 is fixedly connected to a plurality of horizontal rods 20153. The connection method can be, but is not limited to, a tight connection by using fasteners such as screws. The first outer frame 201512 and the first inner frame 201511 can be connected via a first connecting rod assembly 2016.

[0168] 17 is a local enlarged view of the structure of part C in FIG. 16. In the present application, the first connecting rod assembly 2016 includes a first connecting rod 20161 and a second connecting rod 20162. A first end 201611 of the first connecting rod 20161 is hinged to the first inner frame 201511, and a second end 201612 of the first connecting rod 20161 is hinged to the first outer frame 201512. The first connecting rod 20161 may be hinged to the first inner frame 201511 and the first outer frame 201512 via a pin shaft, but is not limited thereto. A first end 201621 of the second connecting rod 20162 is hinged to the rod body of the first connecting rod 20161. The rod body of the first connecting rod 20161 is a portion located between the first end 201611 and the second end 201612. The second end 201622 of the second connecting rod 20162 may be hinged to another mechanical part of the keyboard body 201. The other mechanical part of the keyboard body 201 may be any mechanical part in a fixed position of the keyboard body 201. In this application, a mechanical part in a fixed position is a mechanical part whose position does not change regardless of the operating state of the keyboard assembly. For example, the keyboard cover 2013 shown in FIG. 12 is a structure in a fixed position of the keyboard body 201. Similarly, the second connecting rod 20162 may be connected to the first connecting rod 20161 and the mechanical part of the keyboard body 201 through a pin shaft, but is not limited thereto. Furthermore, in a possible implementation of the present application, the second end 201622 of the second connecting rod 20162 may be located on a side of the first end 201621 away from the first inner frame 201511.

[0169] Still referring to FIG. 16, in the present application, the second frame 20152 may include a second inner frame 201521 and a second outer frame 201522, the second inner frame 201521 and the second outer frame 201522 are arranged side by side, and the second inner frame 201521 is located on the side of the second outer frame 201522 facing the key 2012. Furthermore, the second outer frame 201522 is configured to be fixedly connected to the rotating shaft connecting rod 2014 shown in FIG. 13a, and the second inner frame 201521 is fixedly connected to a plurality of horizontal rods 20153. The connecting method may be, but is not limited to, a tight connection by using fasteners such as screws. The second outer frame 201522 and the second inner frame 201521 may be connected via a second connecting rod assembly 2017. The second connecting rod assembly 2017 includes a third connecting rod and a fourth connecting rod. In the present application, a first end of the third connecting rod is hinged to the second inner frame 201521, and a second end of the third connecting rod is hinged to the second outer frame 201522. This is similar to the case of the first frame 20151. The third connecting rod may be hinged to the second inner frame 201521 and the second outer frame 201522 through a pin shaft, but is not limited thereto. The first end of the fourth connecting rod is hinged to the rod body of the third connecting rod, and the second end of the fourth connecting rod may be hinged to other mechanical parts of the keyboard body 201. For example, the second end may be hinged to the keyboard cover 2013. Similarly, the fourth connecting rod may be connected to the third connecting rod and mechanical parts of the keyboard body 201 through a pin shaft, but is not limited thereto. Furthermore, in a possible embodiment of the present application, the second end of the fourth connecting rod may be located on a side of the first end, away from the second inner frame 201521.

[0170] Still referring to Fig. 17, in Fig. 17, a coordinate system including an X-axis and a Y-axis is used to indicate the moving directions of the first frame 20151 and the horizontal rod 20153. The positive direction of the Y-axis points to the rotating shaft mechanism (not shown in Fig. 17, but may refer to Fig. 13a), and the positive direction of the X-axis points to the second frame (not shown in Fig. 17, but may refer to Fig. 16). Furthermore, in this application, the positive direction of the X-axis may be the same as or opposite to the arrangement direction of each row of the keys 2012. The process in which the first frame 20151 drives the horizontal rod 20153 to move is described by using an example in which the keyboard assembly 2 shown in Fig. 17 is in an open state.

[0171] When the keyboard assembly 2 changes from the open state shown in FIG. 17 to the closed state, the rotating shaft mechanism 3 drives the first outer frame 201512 to move toward the positive direction of the Y axis, and the second end 201612 of the first connecting rod 20161 moves toward the positive direction of the Y axis accordingly. Since the second end 201622 of the second connecting rod 20162 is located in the positive direction of the Y axis of the first connecting rod 20161, the second end 201612 of the first connecting rod 20161 moves along the positive direction of the Y axis. Specifically, the second end 201612 of the first connecting rod 20161 moves toward the second end 201622 of the second connecting rod 20162. Furthermore, the second end 201622 of the second connecting rod 20162 is fixedly connected to the structure of the keyboard body 201. The second end 201622 of the second connecting rod 20162 is always in a fixed position and the second connecting rod 20162 can only rotate about the second end 201622 .

[0172] FIG. 18 shows the relative positional relationship between the first connecting rod 20161 and the second connecting rod 20162 when the keyboard assembly 2 is in a closed state. Comparing FIG. 17 and FIG. 18, it can be seen that in the process of changing the keyboard assembly 2 from the open state shown in FIG. 17 to the closed state shown in FIG. 18, the included angle between the first connecting rod 20161 and the second connecting rod 20162 in the X-axis direction decreases, and the first end 201611 of the first connecting rod 20161 and the first end 201621 of the second connecting rod 20162 both move along the positive direction of the X-axis to push the first inner frame 201511 to move along the positive direction of the X-axis. Each horizontal rod 20153 driven by the first inner frame 201511 moves along a direction toward the second inner frame 20152.

[0173] It can be seen that in the above process, the included angle between the third connecting rod and the fourth connecting rod in the X-axis direction increases, and the first end of the third connecting rod and the first end of the fourth connecting rod both move along the positive direction of the X-axis to drive the second inner frame 201521 to move along the positive direction of the X-axis. Each horizontal rod 20153 driven by the second inner frame 201521 moves along a direction away from the first inner frame 20151.

[0174] Furthermore, when the keyboard assembly 2 changes from the closed state shown in FIG. 18 to the open state shown in FIG. 17, each horizontal rod 20153 driven by the first inner frame 201511 and the second inner frame 201521 moves along the negative direction of the X-axis.

[0175] In the present application, in the process of changing the keyboard assembly 2, the first outer frame 201512 and the second outer frame 201522 can move toward or away from the rotating shaft mechanism to drive the first inner frame 201511 and the second inner frame 201521 to move in the same direction along the arrangement direction of each row of the keys 2012, so that the horizontal rod 20153 can move back and forth along the arrangement direction of each row of the keys 2012 accordingly. Furthermore, each horizontal rod 20153 is disposed corresponding to one row of the keys 2012. Based on this, in order to realize the up and down of the keys 2012 in different folding states of the keyboard assembly 2, the pushing mechanism can be disposed between the horizontal rod 20153 and the corresponding key 2012, so that the key 2012 moves up or down when pressed and after being pressed by the forward and backward movement of the horizontal rod 20153.

[0176] For specific implementation, please refer to FIG. 19. FIG. 19 is an enlarged view of a partial structure of the horizontal rod 20153 according to a possible embodiment of the present application. A first abutment structure 201531 may be disposed on the horizontal rod 20153. There may be a plurality of first abutment structures 201531. The first abutment structures 201531 may be specifically disposed based on the number of keys 2012 correspondingly disposed on the horizontal rod 20153. In this embodiment of the present application, the first abutment structure 201531 may include a first inclined surface 2015311. Furthermore, the inclination angles of the first inclined surfaces 2015311 of the plurality of first abutment structures 201531 may be the same or different.

[0177] Further, please refer to FIG. 20. FIG. 20 is a schematic diagram of a structure for installing a horizontal rod 20153 on a keyboard body 201. The keyboard body 201 has a plurality of key slots 2018. At least one first abutment structure 201531 can be accommodated correspondingly in each key slot 2018. For example, as shown in FIG. 20, two first abutment structures 201531 can be accommodated in each key slot 2018.

[0178] In the present application, the key 2012 may include a key cap 20121 and a vertical mechanism. The key cap 20121 covers the vertical mechanism and is fixed to the vertical mechanism to protect the vertical mechanism. Furthermore, the key cap 20121 may function as a force-bearing part of the key 2012, and the input function of the keyboard assembly 2 may be realized by depressing the vertical mechanism by applying force to the key cap 20121. The vertical mechanism may drive the key cap 20121 to raise the key cap 20121 after the force applied to the key cap 20121 is removed. FIG. 21 is a schematic diagram showing a structure of the vertical mechanism 20122 according to an embodiment of the present invention. The vertical mechanism 20122 may be received in the key slot 2018 shown in FIG. 20. A second abutment structure 201221 is disposed on the vertical mechanism 20122. The second abutment structure 201221 may include a second inclined surface 2012211. Furthermore, each vertical mechanism 20122 may have a plurality of second abutment structures 201221. For example, as shown in Fig. 21, two second abutment structures 201221 may be disposed in each vertical mechanism 20122. When each vertical mechanism 20122 has a plurality of second abutment structures 201221, the inclination directions of the second inclined surfaces 2012211 of the plurality of second abutment structures 201221 may be the same or different.

[0179] FIG. 22 illustrates the cooperation relationship between the horizontal rod 20153 and the key 2012 when the keyboard assembly 2 is in an open state. In the embodiment illustrated in FIG. 22, the key cap is omitted for easier depiction of the cooperation between the horizontal rod 20153 and the key 2012. Furthermore, compared with FIG. 17, the view angle of the keyboard assembly 2 in FIG. 22 is adjusted. However, the directions of the Y-axis and the X-axis in FIG. 22 are the same as those in FIG. 17.

[0180] As shown in FIG. 22, in the present application, for the horizontal rod 20153 and the key 2012 correspondingly arranged, the first inclined surface 2015311 of the first abutment structure 201531 of the horizontal rod 20153 shown in FIG. 19 and the second inclined surface 2012211 of the second abutment structure 201221 of the up-down mechanism 20122 shown in FIG. 21 can be arranged relative to each other. The first abutment structure and the second abutment structure are located in the same key slot 2018. The second inclined surface 2012211 is in the positive direction of the X-axis relative to the first inclined surface 2015311. Furthermore, in the state shown in FIG. 22, the first inclined surface 2015311 and the second inclined surface 2012211 arranged relative to each other can be spaced apart; or the first inclined surface 2015311 and the second inclined surface 2012211 contact each other with no or a small pushing force therebetween. In this case, when the up / down mechanism 20122 is in an up state, the entire key 2012 can protrude from the surface of the keyboard cover 2013 shown in FIG. 12 to realize the input function of the keyboard assembly 2 by hitting the key 2012.

[0181] From the description of the above embodiment, it can be seen that when the keyboard assembly 2 changes from the open state shown in Fig. 22 to the closed state, the horizontal rod 20153 can move along the positive direction of the X-axis, and the second inclined surface 2012211 of the second abutment structure 201221 is in the positive direction of the X-axis relative to the first inclined surface 2015311 of the first abutment structure 201531. Therefore, when the horizontal rod 20153 moves along the positive direction of the X-axis, the first inclined surface 2015311 can be used to apply a pushing force to the second inclined surface 2012211. Fig. 23 shows the cooperation relationship between the horizontal rod 20153 and the key 2012 when the keyboard assembly 2 is in the closed state. It can be seen from Fig. 23 that when the keyboard assembly 2 is in a closed state, the up-down structure 20122 drives the key cap to move down under the pushing force applied to the second inclined surface 2012211 via the first inclined surface 2015311, so that the key 2012 can be hidden in the corresponding key slot 2018. Therefore, the thickness of the keyboard assembly 2 in the closed state is thin. In this way, it meets the requirement of the thin design of the electronic device and improves the user's using experience.

[0182] Furthermore, when the keyboard assembly 2 changes from the closed state to the open state, the horizontal rod 20153 moves along the negative direction of the X-axis, and the pushing force applied to the second inclined surface 2012211 via the first inclined surface 2015311 becomes gradually smaller. The up-down mechanism 20122 can drive the key cap 20121 to rise from the corresponding key slot 2018, and the key cap 20121 can be protruded from the surface of the keyboard cover 2013 shown in FIG. 12, thereby realizing the function of the key 2012.

[0183] It should be noted that the solution of the key 2012 being raised and lowered according to the folding state of the keyboard assembly 2 provided in the present application can be applied to the keyboard assembly 2 of the present application, and can also be applied to other foldable electronic devices having a keyboard. For example, the solution can also be applied to a notebook computer. For specific setting methods, please refer to the above-mentioned embodiments of the present application. Details will not be described again here.

[0184] From the description of the above embodiment, referring to Fig. 2, it can be seen that the support part 202 of the keyboard assembly 2 can be configured to support the host 1 installed on the first support board 2021. Therefore, in the process of changing the keyboard assembly 2 from a closed state to an open state and from an open state to a closed state, a relatively high requirement is imposed on the movement stability of the support part 202.

[0185] In light of this, reference is made to FIG. 24. FIG. 24 is a schematic diagram of the structure of the rotating shaft mechanism 3 according to another embodiment of the present application. In this embodiment, the rotating shaft mechanism 3 may further include a cam 303. The cam 303 may rotate synchronously with the main shaft 3018 of the rotating assembly 301. In other words, the cam 303 and the main shaft 3018 are fastened to each other in the radial direction of the main shaft 3018. A special-shaped hole may be disposed in the cam 303. For example, the special-shaped hole may be, but is not limited to, a D-shaped hole. Furthermore, a section of the part of the main shaft 3018 that penetrates the cam 303 is also set to a special-shaped section that can fit the special-shaped hole, thereby realizing radial restriction of the cam 303 and the main shaft 3018.

[0186] Still referring to FIG. 24, the cam slide slot 3031 is disposed on the surface of the cam 303. Further referring to FIG. 25a. FIG. 25a is a schematic partial view of the structure of the keyboard assembly 2 in a closed state according to an embodiment of the present application. FIG. 25a shows the structure of the fourth support board 2024 of the support part 202 in a closed state. An auxiliary support mechanism 20241 is disposed on the fourth support board 2024. The auxiliary support mechanism 20241 includes a first support rod 202411 and a second support rod 202412. The first support rod 202411 and the second support rod 202412 are disposed in a crossing manner. The middle parts of the first support rod 202411 and the second support rod 202412 are hinged.

[0187] Further, a sliding portion 20242 and a sliding portion 20243 are disposed on the fourth support board 2024. The sliding portion 20242 and the sliding portion 20243 can extend in a direction away from the keyboard body 201. A first sliding block 20244 is disposed on the sliding portion 20242. A second sliding block 20245 is disposed on the sliding portion 20243. Still referring to FIG. 25a, in the present application, both the first sliding block 20244 and the second sliding block 20245 can be fixedly connected to the fourth support board 2024.

[0188] From the description of the above embodiment, in order to stably move the rotating shaft mechanism 3 relative to one another, one rotating assembly 301 may be disposed at each of the two end portions of the rotating shaft mechanism 3 in the length direction. Furthermore, in the present application, one cam 303 may be disposed corresponding to each rotating assembly 301.

[0189] In this manner, the auxiliary support structure may be located between the two rotating assemblies 301. One end of the first support rod 202411 may be accommodated in the cam slide slot 3031 of one cam 303, and the other end of the first support rod 202411 is hinged to the first slide block 20244. One end of the second support rod 202412 is accommodated in the cam slide slot 3031 of the other cam 303, and the other end of the second support rod 202412 is hinged to the second slide block 20245. FIG. 25b shows the structure of the fourth support board 2024 of the support part 202 shown in FIG. 25a when the keyboard assembly 2 is in an open state. With reference to both FIG. 25a and FIG. 25b, in the process from the closed state shown in FIG. 25a to the open state shown in FIG. 25b, the cam 303 may rotate together with the main shaft 3018 of the rotating assembly 301. In this manner, the end of the first support rod 202411 accommodated in the corresponding cam slide slot 3031 and the end of the second support rod 202412 accommodated in the corresponding cam slide slot 3031 are pushed to move toward each other along the axial direction of the main shaft 3018. Since the first support rod 202411 is hinged to the second support rod 202412, in the above process, the first support rod 202411 can push the first slide block 20244 to slide along the slide portion 20243 in a direction away from the keyboard body 201, and the second support rod 202412 can push the second slide block 20245 to slide along the slide portion 20242 in a direction away from the keyboard body 201. Furthermore, since the first slide block 20244 and the second slide block 20245 are both fixedly connected to the fourth support board 2024, in the process of the first slide block 20244 and the second slide block 20245 sliding in a direction away from the keyboard body 201, the fourth support board 2024 can be pressed to slide in a direction away from the keyboard body 201.In this manner, the movement stability of the support part 202 can be improved during the process of opening the keyboard assembly 2, so that the keyboard assembly 2 can stably support the host 1 placed on the first support board 2021, thereby improving the user experience.

[0190] It can be understood that in the present application, the orbital shape of the cam slide slot 3031 can be designed based on the moving directions of the first support rod 202411, the second support rod 202412, and the first slide block 20244 and the second slide block 20245. Therefore, the first slide block 20244 and the second slide block 20245 can be pushed to slide stably in the process of the first support rod 202411 and the second support rod 202412 rotating around the hinge joint of the first support rod 202411 and the second support rod 202412.

[0191] In addition to the above-mentioned structure, the rotating shaft mechanism 3 provided in the present application may further include an automatic opening / closing device 304. The automatic opening / closing device 304 may include a motor 3041. When the rotating shaft mechanism 3 is used in the keyboard assembly 2, the motor 3041 can be used to drive the rotating shaft mechanism 3 to move so as to open or close the keyboard assembly 2, thereby simplifying the operation procedure of the user.

[0192] In addition, users have personal requirements for the use angle of the folding device. In the process in which the motor 3041 is used to drive the keyboard assembly 2 to open and close, the process may be unconsciously intervened according to the user's requirements. If the torque provided by the motor 3041 is insufficient, the motor 3041 or other machine parts will be damaged. To solve this problem, the motor 3041 can be operated safely and reliably. A protection mechanism 3042 may further be arranged in the automatic opening and closing device 304 provided in this application.

[0193] For specific implementation, please refer to FIG. 26. FIG. 26 is a schematic diagram of the structure of the rotating shaft mechanism 3 according to an embodiment of the present application. In an embodiment of the present application, in addition to the rotating assembly 301, the rotating shaft mechanism 3 further includes an automatic opening / closing device 304. The automatic opening / closing device 304 includes a motor 3041 and a protection mechanism 3042. The protection mechanism 3042 can be, but is not limited to, a clutch. The protection mechanism 3042 is located between the motor 3041 and the rotating assembly 301. The motor 3041 can be used to drive the rotating shaft mechanism 3 to rotate, so as to realize the automatic opening / closing function of the keyboard assembly. The protection mechanism 3042 can protect the motor 3041. In a normal working state, the motor 3041 transmits torque to the rotating assembly 301 through the protection mechanism 3042 to drive the rotating assembly 301 to rotate. When the load on the motor 3041 is too large, the protection mechanism 3042 can adjust the load on the motor 3041 to avoid damage to the motor.

[0194] 27 is a schematic diagram showing a structure of a protection mechanism 3042 according to an embodiment of the present application. The protection mechanism 3042 includes a fastening frame 30421. The fastening frame 30421 may function as a support base for the entire protection mechanism 3042 to support other components of the protection mechanism 3042. Furthermore, a first fastening plate 304211 and a second fastening plate 304212 may be disposed on the fastening frame 30421. The first fastening plate 304211 and the second fastening plate 304212 are disposed relative to each other so as to form an installation space between the first fastening plate 304211 and the second fastening plate 304212.

[0195] Figure 28 is an exploded view of the protection mechanism 3042 shown in Figure 27. In the present application, the fastening frame 30421 can be fixedly connected to the keyboard body 201 of the above-mentioned embodiment. The connection method can be, but is not limited to, a screw connection.

[0196] Still referring to FIG. 28, the protection mechanism 3042 further includes two rotating shaft assemblies. For ease of explanation, the two rotating shafts may be respectively indicated as a first rotating shaft assembly 30422 and a second rotating shaft assembly 30423. The first rotating shaft assembly 30422 and the second rotating shaft assembly 30423 are accommodated in an installation space between a first fastening plate 304211 and a second fastening plate 304212. The first rotating shaft assembly 30422 includes a first shaft 304221. The second rotating shaft assembly 30423 includes a second shaft 304231. The axes of the first shaft 304221 and the second shaft 304231 may be set in parallel. One end of the first shaft 304221 is fastened to the first fastening plate 304211, and the other end of the first shaft is fastened to the second fastening plate 304212. One end of the second shaft 304231 is fastened to the first fastening plate 304211 , and the other end of the second shaft extends toward the second fastening plate 304212 .

[0197] Moreover, the first rotating shaft assembly 30422 further includes a first gear piece 304222. The first gear piece 304222 is disposed on the first shaft 304221 in a sleeve-like manner. The first gear piece 304222 can rotate around the first shaft 304221 and can slide along the axial direction of the first shaft 304221. In a direction from the first fastening plate 304211 to the second fastening plate 304212, the first gear structure 3042221 and the second gear structure 3042222 are disposed on the first gear piece 304222, and the first gear structure 3042221 and the second gear structure 3042222 are spaced apart from each other. 28, a guide slot structure 3042223 is further disposed in the first gear piece 304222, and the guide slot structure 3042223 is located between the first gear structure 3042221 and the first fastening plate 304211. A guide slot 30422231 is disposed in the guide slot structure 3042223. The guide slot 30422231 may be arranged in a spiral shape, but is not limited thereto.

[0198] When the second rotating shaft assembly 30423 is specifically disposed, a second gear piece 304232 is further disposed on the second rotating shaft assembly 30423. The second gear piece 304232 is sleeved on the second shaft 304231 and can rotate about the second shaft 304231. Still referring to FIG. 28 , a third gear structure 3042321 can be disposed on the second gear piece 304232. The third gear structure 3042321 can mesh with the first gear structure 3042221.

[0199] A first stopper 3042322 may further be disposed on an end of the second gear piece 304232 facing the first fastening plate 304211. A notch 30423221 may be disposed on the first stopper 3042322. Furthermore, the second rotating shaft assembly 30423 may further include a fixed pin 304233 and a slide pin 304234. The fixed pin 304233 and the slide pin 304234 are located on a side of the second gear piece 304232 facing the first fastening plate 304211. Still referring to FIG. 28 , the fixed pin 304233 may be sleeve-like disposed on the second shaft 304231, and the fixed pin 304233 may be rotatably connected to the second shaft 304231. Additionally, a fixing pin 304233 may extend from the first fastening plate 304211 out of the installation space to fixedly connect to a main shaft of the rotating assembly of the previous embodiment.

[0200] In the present application, the protection mechanism 3042 may further include a conversion bracket 30424 to connect the fixed pin 304233 to the rotating shaft of the rotating assembly. The conversion bracket 30424 may be disposed on a side of the first fastening plate 304211 away from the second fastening plate 304212. An end of the fixed pin 304233 extending from the first fastening plate 304211 outside the installation space may be fixedly connected to the conversion bracket 30424. The conversion bracket 30424 may rotate synchronously with the main shaft of the rotating assembly shown in FIG.

[0201] 28, the mounting hole 304241 is disposed in the conversion bracket 30424. The main shaft 3018 (see FIG. 7) of the rotating assembly 301 can be disposed in the mounting hole 304241. The conversion bracket 30424 can rotate synchronously with the main shaft 3018. From the description of the above embodiment, in the present application, the section of the main shaft 3018 that is disposed in the mounting hole 304241 can be a non-shaped section, for example, a D-shaped section. In this case, the mounting hole 304241 of the conversion bracket 30424 can also be disposed as a non-shaped hole, for example, a D-shaped hole, which is associated with the section of the main shaft.

[0202] 29a is a view of the protection mechanism 3042 shown in FIG. 27 in the direction D. In the present application, the fixed pin 304233 includes an open slot 3042331. An opening of the open slot 3042331 is located at an end of the fixed pin 304233 that is away from the first fastening plate 304211. The open slot 3042331 extends in a direction toward the first fastening plate 304211. In the present application, a guide structure 3042332 may be further disposed on a surface of the fixed pin 304233. The guide structure 3042332 may be a protrusion structure. The guide structure 3042332 can be inserted into the guide slot 30422231 of the guide slot structure 3042223 of the first gear piece 304222, and can slide along the guide slot 30422231.

[0203] In the present application, in the process of the guide structure 3042332 sliding in the guide slot 30422231, the first gear piece 304222 can be pushed to slide along the first rotating shaft. Still referring to FIG. 28, in a possible embodiment of the present application, an assist mechanism 304223 can be further arranged on the first rotating shaft assembly 30422. The assist mechanism 304223 can provide an assist for the sliding of the first gear piece 304222 along the first shaft 304221 so as to improve the sliding reliability of the first gear piece 304222. In the present application, the specific manner of arranging the assist mechanism 304223 is not limited. For example, the assist mechanism 304223 can be a torsion spring. One end of the assist mechanism 304223 can be fixedly connected to the first gear piece 304222, and the other end of the assist mechanism can be fixedly connected to the first shaft 304221. By appropriately designing the shape of the torsion spring, in the process of the first gear piece 304222 sliding along the first shaft 304221, the elastic force generated by the deformation of the torsion spring drives the first gear piece 304222 and the first shaft 304221 to slide relative to each other.

[0204] 29a, the slide pin 304234 is located between the fixed pin 304233 and the first stopper 3042322. The slide pin 304234 is arranged on the second shaft 304231 shown in FIG. 28 in a sleeve-like manner, and can slide along the axial direction of the second shaft 304231. In the present application, a pin shaft 3042341 is arranged on the end of the slide pin 304234 facing the fixed pin 304233. The pin shaft 3042341 can be inserted into the open slot 3042331 of the fixed pin 304233, and can slide along the open slot 3042331.

[0205] In the present application, it can be understood that there can be one or more open slots 3042331 in the fixed pin 304233. The pin shaft 3042341 disposed in the slide pin 304234 can be disposed corresponding to the open slots 3042331 to improve the sliding stability of the slide pin 304234 along the open slots 3042331 of the fixed pin 304233.

[0206] 29a, a second stopper 3042342 is further disposed at an end of the slide pin 304234 away from the fixed pin 304233. The second stopper 3042342 may be a protruding structure. When the slide pin 304234 slides in a direction away from the first fastening plate 304211, the second stopper 3042342 is inserted into the notch 30423221 of the first stopper 3042322, so that the slide pin 304234 and the second gear piece 304232 are locked relative to each other. The pin shaft 3042341 of the slide pin 304234 is always positioned in the open slot 3042331 of the fixed pin 304233, and the fixed pin 304233 is fixedly connected to the main shaft of the rotating assembly, so that when the second stopper 3042342 is inserted into the notch 30423221 of the first stopper 3042322, the second gear piece 304232 can rotate synchronously with the fixed pin 304233.

[0207] Still referring to FIG. 29a, a first clamp portion (not shown in FIG. 29a) may be further provided on a side of the slide pin 304234 facing the first gear piece 304222, and a second clamp portion (not shown in FIG. 28) may be further provided on the first gear piece 304222. The first clamp portion may be clamped to the second clamp portion. Thus, when the first gear piece 304222 slides along the first shaft 304221, the slide pin 304234 may be pushed to slide along the second shaft 304231 in the opposite direction to the direction of the first gear piece 304222. In the present application, the specific structures of the first clamp portion and the second clamp portion are not limited. For example, the first clamp portion may be a protrusion. The shape of the first clamp portion may be, but is not limited to, a trapezoid. Additionally, the second clamping portion may be a slot and the protrusion may be clamped into the slot to achieve clamping between the first clamping portion and the second clamping portion. In some other embodiments of the present application, the first clamping portion may alternatively be a slot and the second clamping portion may be a protrusion.

[0208] Still referring to FIG. 29a, a motor connection piece 304235 may further be disposed at an end of the second shaft 304231 facing the second fastening plate 304212. The motor connection piece 304235 may be configured to be fixedly connected to a rotating shaft of a motor. Furthermore, the second rotating shaft assembly 30423 may further include a conversion bracket 30425. The conversion bracket 30425 is located between the second rotating shaft assembly 30423 and the second fastening plate 304212. The conversion bracket 30425 abuts the second rotating shaft assembly 30423. In the present application, the conversion bracket 30425 may be disposed on the second shaft in a sleeve-like manner. The conversion bracket 30425 may be connected to the motor connection piece 304235. The conversion bracket 30425 may rotate together with the motor connection piece 304235.

[0209] As shown in FIG. 29a, the fourth gear structure 304251 may be disposed on the surface of the conversion bracket 30425, and the second gear structure 3042222 of the first gear piece 304222 meshes with the fourth gear structure 304251. In the present application, FIG. 29a is a schematic diagram of the structure of the protection mechanism 3042 when the keyboard assembly is in a closed state. FIG. 29b is a view in the E direction of FIG. 29a. FIG. 29b shows the structure of the side of the conversion bracket 30424 in the closed state. In the closed state, the first gear structure 3042221 meshes with the third gear structure 3042321, and the second gear structure 3042222 meshes with the fourth gear structure 304251. Furthermore, the guide structure 3042332 on the fixed pin 304233 is inserted into the guide slot 30422231 of the guide slot structure 3042223.

[0210] In the process of changing the keyboard assembly from a closed state to an open state, the motor 3041 shown in FIG. 26 operates and drives the conversion bracket 30425 to rotate by using the motor connecting piece 304235. Since the second gear structure 3042222 of the first gear piece 304222 meshes with the fourth gear structure 304251 of the conversion bracket 30425, the rotation of the conversion bracket 30425 can drive the first gear piece 304222 to rotate. Furthermore, since the first gear structure 3042221 of the first gear piece 304222 meshes with the third gear structure of the second gear piece 304232, the rotation of the first gear piece 304222 can drive the second gear piece 304232 to rotate.

[0211] 29a, in the closed state, the second stopper 3042342 of the slide pin 304234 is inserted into the notch 30423221 of the first stopper 3042322 of the second gear piece 304232, and the pin shaft 3042341 of the slide pin 304234 is inserted into the open slot 3042331 of the fixed pin 304233. In this manner, in the process of the keyboard assembly changing from the closed state to the open state, the rotation of the first gear piece 304222 can drive the second gear piece 304232 to rotate, and the rotation of the second gear piece 304232 can drive the rotating slide pin 304234 and the fixed pin 304233 to rotate accordingly. The fixed pin 304233 is further connected to the main shaft of the rotating assembly via a conversion bracket 30424 to drive the main shaft of the rotating assembly to rotate together with the fixed pin 304233.

[0212] Furthermore, in the process of rotating the first gear piece 304222, the guide structure 3042332 of the fixed pin 304233 can slide along the guide slot 30422231 of the guide slot structure 3042223, and the guide slot 30422231 of the guide slot structure 3042223 interacts with the guide structure 3042332 of the fixed pin 304233. In this case, through appropriate design, in the process of the guide structure 3042332 of the fixed pin 304233 sliding along the guide slot 30422231 of the guide slot structure 3042223, the first gear piece 304222 is pushed to slide along the first shaft 304221 in the direction toward the second fastening plate 304212. Also, from the description of the above embodiment, it can be seen that the slide pin 304234 can slide synchronously with the first gear piece 304222. During the process in which the first gear piece 304222 slides along the first shaft 304221 in a direction toward the second fastening plate 304212, the slide pin 304234 can be pushed so as to slide along the second shaft 304231 in a direction toward the first fastening plate 304211.

[0213] FIG. 30a is a schematic diagram of the structure of the protection mechanism 3042 when the keyboard assembly is in an open state. FIG. 30b is a view in the F direction of FIG. 30a. FIG. 30b shows the structure of the side of the conversion bracket 30424 in a closed state. When the keyboard assembly is in an open state, the first gear structure 3042221 and the third gear structure 3042321 are staggered to release the engagement relationship between the first gear piece 304222 and the second gear piece 304232. However, in this case, the second gear structure 3042222 and the fourth gear structure 304251 are still in an engaged state. Furthermore, in this case, the second stopper 3042342 of the slide pin 304234 is disengaged from the notch 30423221 of the first stopper 3042322 of the second gear piece 304232 shown in FIG. There is no connection between the slide pin 304234 and the second gear piece 304232.

[0214] It can be understood that the closing of the keyboard assembly is usually performed by a user's operation. In a specific implementation, the user can apply a force toward the keyboard body to the first support board of the support part of the keyboard assembly. From the description of the above embodiment, it can be seen that in the process of changing the keyboard assembly from an open state to a closed state, the movement of the first support board toward the keyboard body can drive the main shaft of the rotating assembly to rotate. With reference to both Fig. 29a and Fig. 30a, the process of changing the keyboard assembly from an open state to a closed state is the process of the protection mechanism moving from the state shown in Fig. 30a to the state shown in Fig. 29a. The main shaft of the rotating assembly can rotate synchronously with the conversion bracket 30424, and in this process, the first gear piece 304222 slides along the first shaft 304221 in a direction toward the first fastening plate 304211 under cooperation of the guide structure 3042332 of the fixed pin 304233 and the guide slot 30422231, so that the gear structures corresponding to the first gear piece 304222 and the second gear piece 304232 mesh again. Furthermore, during the process of the first gear piece 304222 sliding in the direction toward the first fastening plate 304211, the slide pin 304234 can be driven to slide in the direction toward the second fastening plate 304212, so that the second stopper 3042342 of the slide pin 304234 is again inserted into the notch 30423221 of the first stopper 3042322 of the second gear piece 304232.

[0215] With the understanding of the structure and working principle of the protection mechanism 3042 provided in this application, the following describes an implementation in which the protection mechanism 3042 protects the motor 3041 shown in FIG.

[0216] 31 is a cross-sectional view of a protection mechanism 3042 according to an embodiment of the present application. For ease of explanation, FIG. 31 only shows the cross-sectional structure of the second rotating shaft assembly 30423, and omits the cross-sectional structure of the first rotating shaft assembly 30422.

[0217] 31, the conversion bracket 30425 includes an accommodation cavity 304252, and an opening of the accommodation cavity 304252 faces the motor connection piece 304235. The motor connection piece 304235 includes a rotation center piece 3042351. The rotation center piece 3042351 can be inserted into the accommodation cavity 304252. Still referring to FIG. 31, in the present application, the second shaft 304231 can be inserted into the rotation center piece 3042351. Furthermore, an end of the rotation center piece 3042351, which is away from the conversion bracket 30425, can penetrate the second fastening plate 304212 to connect to the motor.

[0218] Moreover, the motor connection piece 304235 may further include a housing 3042352. The housing 3042352 is arranged on the rotation center piece 3042351 in a sleeve-like manner. The housing 3042352 may be fixed to the second fastening plate 304212. From FIG. 31, it can be seen that in a possible embodiment of the present application, a roll ball may be arranged between the housing 3042352 and the rotation center piece 3042351. There may be a plurality of roll balls. Both the housing 3042352 and the rotation center piece 3042351 abut against the roll ball. In this case, the friction force between the housing 3042352 and the rotation center piece 3042351 becomes a rolling friction force, which reduces the risk of damage to the housing and the rotation center piece, thereby extending the life of the housing and the rotation center piece.

[0219] 31, the elastic piece 304253 is further disposed on the conversion bracket 30425. The elastic piece 304253 is accommodated in the accommodation cavity 304252. The elastic piece 304253 is arranged in a sleeve-like manner on the rotation center piece 3042351 of the motor connection piece 304235. In the present application, the specific arrangement form of the elastic piece 304253 is not limited. For example, the elastic piece 304253 may include a plurality of stacked spring plates. Furthermore, the deformation of the elastic piece 304253 may form an elastic force between the conversion bracket 30425 and the rotation center piece 3042351.

[0220] A rolling piece 304254 may be further disposed on the conversion bracket 30425. The rolling piece 304254 is accommodated in the accommodation cavity 304252. A slot is further disposed on the bottom wall of the accommodation cavity 304252 of the conversion bracket 30425. The rolling piece 304254 may be accommodated in the slot. One end of the elastic piece 304253 presses the rolling piece 304254 toward the bottom wall of the accommodation cavity 304252, and the other end of the elastic piece abuts against the rotation center piece 3042351. In the present application, the specific arrangement form of the rolling piece 304254 is not limited. For example, the rolling piece 304254 may be a roll ball or a roll pillar. Furthermore, there may be one or more rolling pieces 304254. The rolling pieces 304254 may be accommodated in the corresponding slots in a one-to-one manner.

[0221] 31 , a pressing block 304255 is further disposed between the elastic piece 304253 and the rolling piece 304254, and the elastic piece 304253 presses the rolling piece 304254 toward the corresponding slot through the pressing block 304255. An arc-shaped slot is disposed on the surface of the pressing block 304255 that is used to contact the rolling piece 304254. At least a part of the rolling piece 304254 can be accommodated in the arc-shaped slot to prevent the rolling piece 304254 from falling off during the movement process.

[0222] In the present application, a gasket 304236 is further disposed between the slide pin 304234 and the second gear piece 304232. The material of the gasket 304236 can be, but is not limited to, polyformaldehyde (POM). The slide pin 304234 and the second gear piece 304232 both abut against the gasket 304236 so as to generate torque in the process of the second gear piece 304232 and the slide pin 304234 rotating relative to each other. Furthermore, wear of the second gear piece and the slide pin can be reduced to improve the reliability of the structure.

[0223] It can be understood that when the keyboard assembly is in an open state, when the keyboard assembly is manually closed, a rotational friction force may be generated between the slide pin 304234 and the second gear piece 304232, since the slide pin 304234 rotates together with the fixed pin 304233. The friction force can generate different torques when the keyboard assembly is in different states, so as to provide different hand feels to consumers.

[0224] Furthermore, according to the rotating shaft mechanism provided in the present application, in the process in which the motor is used to drive the keyboard assembly to be opened or closed, if the torque provided by the conversion bracket 30425 to the motor connecting piece 304235 exceeds a predetermined value due to manual intervention in the process (i.e., the motor is overloaded), the torque generated in the rotation process of the conversion bracket 30425 can overcome the elastic pushing force applied to the rolling piece 304254 by the elastic piece 304253, so that the rolling piece 304254 falls out of the corresponding slot. In this case, the connection relationship between the conversion bracket 30425 and the motor connecting piece 304235 may collapse, and the torque applied to the conversion bracket 30425 is not applied to the motor connecting piece 304235 to avoid damage to the motor connected to the motor connecting piece 304235.

[0225] Therefore, in the present application, the conversion bracket 30425 can function as a torque limiter between the protection mechanism 3042 and the motor 3041 to prevent excessive external torque from being applied to the back of the motor, thereby limiting the torque overload protection of the motor 3041.

[0226] According to the automatic opening / closing device of the present application, during switching between the manual mode and the electric mode, different torques can be generated by switching the connection relationship between the conversion bracket 30425 and the motor connection piece 304235, so that the torque required in the manual mode and the electric mode can be met, thereby satisfying the user experience. Furthermore, both the torque between the conversion bracket 30425 and the motor connection piece 304235 and the torque between the second gear piece 304232 and the conversion bracket 30425 can be realized by using the elastic piece 304253. This can help reduce the space occupied by the automatic opening / closing device to realize a compact design of the automatic opening / closing device.

[0227] In the present application, in the process of using an automatic opening / closing device to drive the keyboard assembly to be opened and closed, in order to improve the movement stability of the keyboard assembly, multiple sets of automatic opening / closing devices can be arranged on the rotating shaft mechanism. For example, one automatic opening / closing device can be arranged on each of the two ends of the rotating shaft mechanism in the longitudinal direction. In this manner, the movement stability of the keyboard assembly can be effectively improved in a synchronous driving manner by using two automatic opening / closing devices.

[0228] In the present application, the rotating assembly 301 of the rotating shaft mechanism 3 may be arranged in other possible ways in addition to the ways provided in the above-mentioned embodiments. For example, Fig. 32a is a schematic diagram of the structure of the rotating assembly 301 according to another embodiment of the present application. Fig. 32a is a schematic diagram of the structure of the rotating assembly 301 when the keyboard assembly 2 is in a closed state. Furthermore, Fig. 32b is a schematic diagram of the structure of the rotating assembly 301 when the keyboard assembly 2 is in an open state.

[0229] 32a and 32b, the rotating assembly 301 includes a connecting piece 3011, a first fastening piece 3012, and a second fastening piece 3013. The first fastening piece 3012 and the second fastening piece 3013 can be fixedly connected to the keyboard body. The connecting method can be, but is not limited to, by using fasteners such as screws. Furthermore, the first fastening piece 3012 and the second fastening piece 3013 can function as a support kit for the entire rotating assembly 301. The first fastening piece 3012 and the second fastening piece 3013 are spaced apart. Other structures of the rotating assembly 301 can be directly or indirectly connected to the first fastening piece 3012 and the second fastening piece 3013.

[0230] For easier understanding of the connection relationship between the structures of the rotating assembly 301, please refer to FIG. 33. FIG. 33 is an exploded view of the rotating assembly 301 shown in FIG. 32a. In this embodiment, the connecting piece 3011 includes a body portion 30111 arranged in a long strip structure. The body portion 30111 can be fixedly connected to a host support kit. The connecting method can be, but is not limited to, a tight connection by using fasteners such as screws. Still referring to FIG. 33, the body portion 30111 can have two segments, and the connecting piece 3011 further includes a connecting structure disposed between the two segments of the body portion 30111. The connecting structure is configured to connect the two segments of the body portion 30111.

[0231] In the present application, the rotating assembly 301 further includes a first connecting rod 3016 and a second connecting rod 3017, and the first connecting rod 3016 is located between the connecting piece 3011 and the second connecting rod 3017. One end of the first connecting rod 3016 facing the connecting piece 3011 is rotatably connected to the connecting structure of the connecting piece 3011 via a first rotating shaft 3015a, and one end of the first connecting rod 3016 facing the second connecting rod 3017 is rotatably connected to the second connecting rod 3017 via a second rotating shaft 3015b.

[0232] Still referring to FIG. 33, the rotating assembly 301 provided in this embodiment of the present application further includes a main shaft 3018, which passes through the first fastening piece 3012, the second connecting rod 3017, and the second fastening piece 3013. The main shaft 3018 can rotate relative to the first fastening piece 3012 and the second fastening piece 3013. In addition, the second connecting rod 3017 and the main shaft 3018 are fastened to each other in the radial direction of the main shaft 3018. In this case, the second connecting rod 3017 and the main shaft 3018 can rotate synchronously around the axis of the main shaft 3018. In a possible embodiment of the present application, a deformed hole can be disposed in the second connecting rod 3017 to fasten the second connecting rod 3017 and the main shaft 3018 relatively in the radial direction. For example, the deformed hole can be, but is not limited to, a D-shaped hole. In addition, the portion of the main shaft 3018 that passes through the second connecting rod 3017 is also set to an irregular section that can accommodate the irregular hole, thereby realizing radial restriction of the second connecting rod 3017 and the main shaft 3018.

[0233] In the present application, in order to allow the rotating assembly 301 to provide a damping force at a rotation position corresponding to the rotating shaft mechanism during the movement process of the entire rotating shaft mechanism to hold the rotating shaft mechanism at a corresponding rotation position, still referring to FIG. 33, in the embodiment of the present application, an elastic piece 3019 may be further arranged on the rotating assembly 301, and the elastic piece 3019 may accumulate an elastic force when pressed. As shown in FIG. 33, the elastic piece 3019 may be arranged on a side of the first fastening piece 3012 and away from the second fastening piece 3013. The specific arrangement form of the elastic piece 3019 is not limited in the present application. For example, the elastic piece 3019 may include an elastic pad. There may be one or more elastic pads. When the elastic piece 3019 includes multiple elastic pads, the multiple elastic pads may be arranged in a stacked manner. Furthermore, referring to FIG. 33, the elastic piece 3019 may be arranged on the main shaft 3018 in a sleeve-like manner. In this embodiment, when the elastic piece 3019 is pressed, the elastic piece 3019 generates an elastic force along the axial direction of the main shaft 3018 .

[0234] In addition, in order to prevent the elastic piece 3019 from falling off the main shaft 3018, a restricting piece 3020 may be further arranged on the side of the elastic piece 3019 away from the first fastening piece 3012. For example, the restricting piece 3020 may be a nut to facilitate assembly and disassembly. The restricting piece 3020 is arranged on the main shaft 3018 in a sleeve-like manner to restrict the elastic piece 3019 along the axial direction of the main shaft 3018. In the present application, a group of gaskets 3021 may be further arranged to apply an effective force to the elastic piece 3019. The group of gaskets 3021 is arranged on the main shaft 3018 in a sleeve-like manner. The elastic piece 3019 is arranged between the group of gaskets 3021. In addition, the outer diameter of the gasket 3021 may be greater than or equal to the outer diameter of the elastic piece 3019. The restricting piece 3020 can come into contact with a gasket 3021 located on a side of the elastic piece 3019 away from the first fastening piece 3012 .

[0235] It should be understood that in the present application, the elastic piece 3019 can be deformed along the axial direction of the main shaft 3018. The elastic force generated by the deformation of the elastic piece 3019 can be applied to the first fastening piece 3012 to generate a friction force between the first fastening piece 3012 and the elastic piece 3019. The friction force can impede the rotation of the main shaft 3018. Furthermore, the second connecting rod 3017 and the main shaft 3018 can rotate synchronously. The second connecting rod 3017 can drive the connecting piece 3011 to rotate. The connecting piece 3011 is fixedly connected to the host support kit 4 fixed to the first support board 2021 shown in FIG. 3b. Therefore, when the second connecting rod 3017 is impeded with the rotation of the main shaft 3018, the movement of the first support board 2021 is impeded. In this manner, the elastic force generated by the elastic piece 3019 is converted into a damping force that impedes the rotation of the rotating shaft mechanism.

[0236] It should be understood that the host 1 can be fixed to the first support board 2021. When the host 1 reaches a certain rotation position in the rotation process of the first support board 2021, if the torque generated by the gravity of the host 1 is equal to the torque generated by the damping force of the rotating shaft mechanism 3, the first support board 2021 can hover at the corresponding rotation position without external force.

[0237] Since the rotating shaft mechanism 3 requires different damping forces at different rotation positions, the change in damping force can be realized by changing the elastic force generated by the elastic piece 3019. The change in the elastic force of the elastic piece 3019 can be realized by changing the deformation of the elastic piece 3019. In a possible embodiment of the present application, an extrusion contact surface can be disposed between the first fastening piece 3012 and the elastic piece 3019, so that the elastic piece 3019 has corresponding deformation at different rotation positions. In a specific implementation, still referring to FIG. 33, a first extrusion structure 3022 is disposed between the elastic piece 3019 and the first fastening piece 3012. The first extrusion structure 3022 is disposed in a sleeve-like manner on the main shaft 3018. The elastic piece 3019 can push the first extrusion structure 3022 toward the first fastening piece 3012, so that the first extrusion structure 3022 abuts against the first fastening piece 3012 under the elastic force of the elastic piece 3019. Furthermore, in the radial direction of the main shaft 3018, the first extrusion structure 3022 and the main shaft 3018 are fastened to each other. A special-shaped hole may be arranged in the first extrusion structure 3022. For example, the special-shaped hole may be, but is not limited to, a D-shaped hole. Furthermore, a section of the part of the main shaft 3018 that penetrates the first extrusion structure 3022 is also set to a special-shaped section that can correspond to the special-shaped hole, thereby realizing the restriction of the first extrusion structure 3022 and the main shaft 3018 in the radial direction.

[0238] In the embodiment of the present application, the first extrusion structure 3022 may be arranged with reference to the first extrusion structure 3022 shown in FIG. 9 . Details will not be described here. From the description of the above embodiment, it can be understood that the first slot 30221 may be arranged on an end surface of the first extrusion structure 3022 facing the first fastening piece 3012.

[0239] Furthermore, the second extrusion structure 3026 may be further disposed on the rotating assembly 301. FIG. 34 is a schematic diagram of the structure of the second extrusion structure 3026 according to a possible embodiment of the present application. Referring to both FIG. 33 and FIG. 34, the second extrusion structure 3026 may be disposed between the first extrusion structure 3022 and the first fastening piece 3012, and the main shaft 3018 may be rotatably connected to the second extrusion structure 3026. The elastic piece 3019 may press the first extrusion structure 3022 toward the second extrusion structure 3026. Furthermore, a first protrusion 30261 may be disposed on an end surface of the second extrusion structure 3026 facing the first extrusion structure 3022, and the first protrusion 30261 may be disposed corresponding to the first slot 30221 of the first extrusion structure 3022. It may be understood that in some other embodiments of the present application, the first slot 30221 may also be disposed on an end face of the second extrusion structure 3026 that faces the first extrusion structure 3022, and the first protrusion 30261 may be disposed on an end face of the first extrusion structure 3022 that faces the second extrusion structure 3026.

[0240] When the correspondingly arranged first protrusion 30261 falls into the first slot 30221 and the first slot 30221 cooperates with the first protrusion 30261 to be clamped, the total length of the first extrusion structure 3022 and the second extrusion structure 3026 in the axial direction of the main shaft 3018 is minimum. In this case, the pushing force on the elastic piece 3019 is minimum, so the elastic force generated is minimum. Therefore, the friction force between the first extrusion structure 3022 and the second extrusion structure 3026 is minimum. After the first extrusion structure 3022 and the second extrusion structure 3026 rotate relative to each other, when the first slot 30221 is misaligned with the first protrusion 30261, the total length of the first extrusion structure 3022 and the second extrusion structure 3026 in the axial direction of the main shaft 3018 increases. Therefore, the elastic piece 3019 accumulates elastic force. Under this elastic force, the friction force between the first extruded structure 3022 and the second extruded structure 3026 increases, thereby increasing the damping force of the rotating shaft mechanism.

[0241] In the present application, by appropriately designing the first slot 30221 and the first protrusion 30261, the damping force of the rotating shaft mechanism 3 is maximum when the corresponding keyboard assembly is in a closed state, so that the keyboard assembly can be kept stably closed.

[0242] Still referring to FIG. 33, in the present application, an elastic piece 3023 may be further disposed on the rotating assembly 301. The elastic piece 3023 may be, for example, a torsion spring. Referring to both FIG. 32a and FIG. 33, the elastic piece 3023 is disposed on a side of the second fastening piece 3013 and away from the first fastening piece 3012, and the elastic piece 3023 is disposed on the main shaft 3018 in a sleeve-like manner, so that the elastic piece 3023 can rotate relative to the main shaft 3018. In addition, the rotating assembly 301 further includes a rotating fastening piece 3027. The rotating fastening piece 3027 is located on a side of the elastic piece 3023 and away from the second fastening piece 3013. The rotating fastening piece 3027 is disposed on the main shaft 3018 in a sleeve-like manner. In the radial direction of the main shaft 3018, the rotating fastening piece 3027 is fixedly connected to the main shaft 3018. A lock slot 30271 is disposed on the rotating fastening piece 3027. One end of the elastic piece 3023 can be locked in the lock slot 30271, and the other end of the elastic piece can be fastened to the second fastening piece 3013. In this manner, during the rotation process of the main shaft 3018, the elastic piece 3023 can generate elastic deformation, thereby generating an elastic force in the direction around the axial direction of the main shaft 3018. On this basis, through appropriate design, the elastic force generated by the elastic piece 3023 can provide an auxiliary force for the rotation of the main shaft 3018. Therefore, when a relatively small force is applied to the connecting piece 3011, the main shaft 3018 can be driven to rotate, which improves the user's comfort when using the rotating assembly 301 to perform the opening and closing operation of the keyboard assembly.

[0243] In addition, a sleeve 3028 may be further disposed on the rotating assembly 301. The sleeve 3028 may be disposed on the main shaft 3018 in a sleeve-like manner. The elastic piece 3023 may be disposed on the sleeve 3028 in a sleeve-like manner. The sleeve 3028 may guide the movement of the elastic piece 3023 along the axial direction, thereby improving the movement stability of the elastic piece 3023.

[0244] Still referring to Fig. 33, the rotating assembly 301 may further include a third connecting rod 3024, which can slide along the second fastening piece 3013. Fig. 35 is also a schematic diagram of the structure of the rotating assembly 301 shown in Fig. 32a from another angle. In this embodiment, the sliding portion 30133 is disposed on a side of the second fastening piece 3013, away from the connecting piece 3011. The third connecting rod 3024 can be accommodated in the sliding portion 30133 and can slide along the sliding portion 30133.

[0245] In some embodiments of the present application, in order to prevent the third connecting rod 3024 from falling off the sliding part 30133, still referring to FIG. 35, the first restricting part 301331 may be disposed on the side wall of the sliding part 30133, and the second restricting part 30242 may be disposed on the third connecting rod 3024. The second restricting part 30242 may be clamped to the first restricting part 301331 and may slide within the first restricting part 301331. The first restricting part 301331 may be a sliding slot, and the second restricting part 30242 may be a protrusion, so that the protrusion can be clamped to the sliding slot. In some other embodiments of the present application, the first restricting part 301331 may alternatively be a protrusion, and the second restricting part 30242 may be a slot. In this manner, the first regulating portion 301331 and the second regulating portion 30242 can cooperate to guide the sliding of the third connecting rod 3024 along the sliding portion 30133 to improve the movement reliability of the third connecting rod 3024.

[0246] Furthermore, in order to realize the sliding of the third connecting rod 3024 in the sliding part 30133 during the rotation process of the rotating assembly 301, it can be seen from FIG. 33 that the side of the third connecting rod 3024 facing the second fastening piece 3013 has a connecting part 30241. Since the rotating assembly 301 can rotate with the rotation of the main shaft 3018, in the present application, the third connecting rod 3024 can be connected to the main shaft 3018 through the connecting part 30241. In a specific implementation, referring to FIG. 33, a swing rod structure 3029 can be further disposed on the rotating assembly 301 provided in the present application, and the swing rod structure 3029 can be disposed on the side of the second fastening piece 3013 away from the first fastening piece 3012. The swing rod structure 3029 can be disposed on the main shaft 3018 in a sleeve-like manner. Furthermore, in the radial direction of the main shaft 3018, the swing rod structure 3029 is fixedly connected to the main shaft 3018, so that the swing rod structure 3029 can rotate synchronously with the main shaft 3018. The swing rod structure 3029 has a protrusion 30291.

[0247] Further, Fig. 36a is a cross-sectional view along GG of the rotating assembly 301 shown in Fig. 35. Referring to both Fig. 33 and Fig. 36a, a track slot 302411 can be disposed in the connecting portion 30241 of the third connecting rod 3024. The protrusion 30291 of the swing rod structure 3029 can be inserted into the track slot 302411 and can contact with the slot wall of the track slot 302411. In this manner, in the process of rotating the main shaft 3018, the swing rod structure 3029 can be driven to rotate synchronously, so that the protrusion 30291 of the swing rod structure 3029 slides along the slot wall of the track slot 302411.

[0248] It can be understood that the movement trajectory of the third connecting rod 3024 can be designed by appropriately designing the track slot 302411. For example, when the rotating assembly 301 is in the closed state shown in FIG. 36a, the protrusion 30291 of the swing rod structure 3029 abuts against the slot wall of the track slot 302411, which is a slot wall away from the connecting piece 3011, so that the third connecting rod 3024 can be hidden by the second fastening piece 3013. Furthermore, FIG. 36b shows the relative position of the protrusion 30291 of the third connecting rod 3024 in the track slot 302411 when the rotating assembly 301 is in an intermediate state from the closed state to the open state. From FIG. 36b, it can be seen that the recess 3024111 can be disposed in the track slot 302411, and the protrusion 30291 extends into the recess 3024111, corresponding to the intermediate state. In the process of continuing to open the rotating assembly 301 from the intermediate state shown in FIG. 36b, the protrusion 30291 can press the side wall of the recess 3024111 to push the third connecting rod 3024 to slide in a direction toward the connecting piece 3011. FIG. 36c shows the relative position of the protrusion 30291 of the third connecting rod 3024 in the track slot 302411 when the rotating assembly 301 is in the open state shown in FIG. 36c, the third connecting rod 3024 can extend from the second fastening piece 3013 in a direction toward the connecting piece. For example, when the rotating assembly 301 is used in a keyboard assembly, the third connecting rod 3024 can slide in a direction toward the keyboard body in the process of changing the keyboard assembly from a closed state to an open state. In contrast, when the keyboard assembly changes from an open state to a closed state, the third connecting rod 3024 can slide in a direction away from the connecting piece 3011, so that the third connecting rod 3024 slides in a direction away from the keyboard body.

[0249] It should be noted that when the rotating shaft mechanism provided in the embodiment of the present application is used in a keyboard assembly, the third connecting rod 3024 can be configured to connect to the rotating shaft connecting piece 2014 of the keyboard body 201 shown in FIG. 13a. In this manner, in the process of the third connecting rod 3024 sliding with the rotation of the main shaft 3018, the rotating shaft connecting piece 2014 can be driven to move in a direction toward or away from the rotating shaft mechanism 3. It can be understood that in the present application, when the third connecting rod 3024 slides along a direction toward the keyboard body 201, the rotating shaft connecting piece 2014 can be driven to move along a direction away from the rotating shaft mechanism 3; when the third connecting rod 3024 slides along a direction away from the keyboard body 201, the rotating shaft connecting piece 2014 can be driven to move along a direction toward the rotating shaft mechanism 3. Alternatively, when the third connecting rod 3024 slides along a direction toward the keyboard body 201, the rotating shaft connecting piece 2014 can be driven to move along a direction toward the rotating shaft mechanism 3; when the third connecting rod 3024 slides along a direction away from the keyboard body 201, the rotating shaft connecting piece 2014 can be driven to move along a direction away from the rotating shaft mechanism 3. Thus, when the keyboard assembly is in an open state, the keys on the keyboard body 201 are in an up state; or, when the keyboard assembly is in a closed state, the keys on the keyboard body 201 are down. For the specific arrangement method of the keyboard body, please refer to the above-mentioned embodiment. Details will not be described again here.

[0250] In addition, when the automatic opening / closing device is further disposed on the rotating shaft mechanism, the connection relationship between the rotating assembly and the automatic opening / closing device in this embodiment of the present application, the method for driving the rotating assembly so that the automatic opening / closing device moves, and the specific method for disposing the automatic opening / closing device can be referred to the above-mentioned embodiment, and the details will not be described again here.

[0251] It should be noted that in the present application, a structure including the support part 202 and the rotating shaft mechanism 3 described in any of the previous embodiments may be defined as a support assembly. The support assembly may use a specific structure described in the previous embodiments and dependent on the keyboard assembly 2 to realize the case where the first support board 2021 rotates to drive the third support board 2023 to slide along a direction toward or away from the rotating shaft mechanism 3. Furthermore, the support assembly may be arranged without depending on the structure of the keyboard assembly 2. When the first support board 2021 rotates around the rotating shaft mechanism 3, the third support board 2023 can be driven to slide along a direction toward or away from the rotating shaft mechanism 3. Therefore, a stable support structure can be formed between the first support board 2021, the second support board, and the third support board 2023.

[0252] Furthermore, the support assembly may be used for an electronic device. The electronic device may further include a host 1. For example, the host 1 may be a tablet computer in the above-mentioned embodiment. The host 1 may be fastened to the first support board 2021. The host 1 may move along a defined track together with the first support board 2021. Furthermore, in the process of the first support board 2021 moving and driving the third support board 2023 to slide along a direction toward or away from the rotating shaft mechanism 3, a triangular support structure surrounding the rotating shaft mechanism 3 may be formed between the first support board 2021, the second support board and the third support board 2023. This may help improve the support stability of the support part 202 to the host 1, thereby improving the structural reliability of the electronic device.

[0253] In a possible embodiment of the present application, a structure including the protection mechanism 3042 and the motor described in any of the above embodiments can be defined as a motor assembly. The motor assembly can protect the motor by using a specific structure described in the above embodiments that depends on the keyboard assembly 2, or can be arranged without depending on the structure of the keyboard assembly 2. When the motor drives the rotating center piece to rotate, and the torque applied to the conversion bracket 30424 is smaller than the connection force between the conversion bracket 30424 and the rotating center piece, the conversion bracket 30424 is connected to the motor connection piece, the conversion bracket 30424 rotates together with the rotating center piece, and the conversion bracket 30424 drives the first gear piece to rotate around the first shaft. The rotation torque of the first gear piece is transmitted to the second rotating shaft assembly. The torque applied to the second rotating shaft assembly is transmitted to the conversion bracket 30424 through the first gear piece, and when the torque applied to the conversion bracket 30424 is greater than the connecting force between the conversion bracket 30424 and the rotating center piece, the conversion bracket 30424 is disconnected from the motor connecting piece. In this manner, the motor is protected.

[0254] When the motor assembly is used in an electronic device, the electronic device can be other possible foldable electronic devices besides two-in-one products. The electronic device only needs to include two parts that can rotate relative to any form of rotating shaft mechanism 3. For example, the electronic device includes a first housing and a second housing, and the motor assembly can be configured to drive the two housings to rotate relative to one rotating shaft mechanism 3 to realize the electrical opening and closing of the electronic device. In this manner, the operation steps of opening and closing the electronic device by the user can be simplified, thereby improving the user experience. Furthermore, in scenarios such as scenarios of manual intervention in the electrical opening and closing of the electronic device, the motor assembly can protect the motor to realize the safe and reliable automatic opening and closing function of the electronic device and extend the life of the electronic device.

[0255] In addition, the rotating shaft connecting piece 2014 of the keyboard body 201 described in any of the previous embodiments of the present application can be connected to the rotating shaft mechanism provided in the previous embodiments of the present application, and further, any other possible rotating shaft mechanism can be used as long as the rotating shaft connecting piece can be driven towards or away from the rotating shaft mechanism during the movement process of the rotating shaft mechanism.

[0256] In addition to the above-mentioned keyboard assembly 2, the keyboard body 201 provided in the present application can be used in electronic devices such as notebook computers. In addition to the keyboard body 201, these electronic devices can further include a display. The display can be rotatably connected to the keyboard body 201 through a rotating shaft mechanism 3. When the electronic device is opened, the key 2012 can move along a defined track in a direction out of the key slot to meet the user's use requirements for input by hitting the key 2012. Also, when the electronic device is closed, the key 2012 can move toward the key slot. In this manner, the part of the key 2012 that is out of the key slot is relatively small, so that the size of the entire keyboard body 201 is relatively small in the thickness direction, which helps to realize a thin design of the keyboard body 201 in this state and also realize a thin design of the electronic device.

[0257] It is obvious that a person skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. This application intends to cover these modifications and variations of this application, provided that they fall within the scope of protection defined by the following claims and their equivalent technologies.

Claims

1. A support assembly including a rotating shaft mechanism and a support part, wherein the rotating shaft mechanism includes a rotating assembly, and the rotating assembly includes a first fastening piece, a second fastening piece, a connecting piece, and a connecting rod assembly; the first fastening piece and the second fastening piece are spaced apart, and the first fastening piece and the second fastening piece are located on the same side portion of the connecting piece; a first slide slot is disposed on an end surface of the first fastening piece facing the second fastening piece, and a second slide slot is disposed on an end surface of the second fastening piece facing the first fastening piece; the connecting piece is rotatably connected to the connecting rod assembly, and the connecting rod assembly can slide along the first slide slot and the second slide slot; the support part has a first support board, a second support board, and a third support board disposed around the rotating shaft mechanism, and one end of the first support board is fixedly connected to the connecting piece; the second support board is located between the first support board and the third support board, and the second support board is rotatably connected to the first support board and the third support board; when the first support board rotates around the rotating shaft mechanism, the connecting rod assembly slides along the first slide slot and the second slide slot, the connecting piece rotates around the connecting rod assembly, and the third support board slides along a direction toward or away from the rotating shaft mechanism, Support assembly.

2. The rotating assembly further has a main shaft, the main shaft penetrates through the first fastening piece, the connecting rod assembly, and the second fastening piece, the main shaft is rotatably connected to the first fastening piece and the second fastening piece, and the main shaft drives the connecting rod assembly to slide along the first slide slot and the second slide slot, The support assembly according to claim 1.

3. The rotating shaft mechanism further has a cam and an auxiliary support mechanism; the cam and the main shaft are fastened to each other in the radial direction of the main shaft, and a cam slide slot is disposed on the surface of the cam; One end of the auxiliary support mechanism is received in the cam slide slot, and the other end of the auxiliary support mechanism is connected to the third support board; the main shaft rotates, and one end of the auxiliary support mechanism slides along the cam slide slot to drive the third support board so as to slide in a direction towards or away from the rotary shaft mechanism. The support assembly according to claim 2.

4. The rotary shaft mechanism has two rotary assemblies, the two rotary assemblies are spaced apart, one of the cams is correspondingly arranged for each rotary assembly, and one of the cam slide slots is arranged on the surface of the corresponding one of the cams; The auxiliary support mechanism is located between the two rotary assemblies, the auxiliary support mechanism has a first support rod and a second support rod, the first support rod and the second support rod are arranged in an intersecting manner, and the middle parts of the first support rod and the second support rod are hinged; one end of the first support rod is received in one of the cam slide slots, and the other end of the first support rod is hinged to the third support board; one end of the second support rod is received in the other cam slide slot, and the other end of the second support rod is hinged to the third support board. The support assembly according to claim 3.

5. The support assembly further has a keyboard body, the support part is rotatably connected to the keyboard body through the rotary shaft mechanism, a receptacle is arranged on the keyboard body, at least a part of the third support board is received in the receptacle, and the third support board can slide in the receptacle. The support assembly according to claim 2.

6. The third support board has an arc-shaped board segment and a linear board segment which are fixedly connected, the arc-shaped board segment is located between the second support board and the linear board segment, the second support board is rotatably connected to the arc-shaped board segment, the arc-shaped board segment can cover the rotary shaft mechanism, and at least a part of the linear board segment is received in the receptacle. The support assembly according to claim 5.

7. The support assembly further has a host support kit, the host support kit is fixedly connected to the connection piece, the host support kit is located on a side portion of the first support board facing the keyboard body, and the host support kit is fixedly connected to an end portion of the first support board facing the connection piece. The support assembly according to claim 5.

8. The connection rod assembly has a first connection rod and a second connection rod. The first connection rod is located between the connection piece and the second connection rod. The second connection rod is located between the first fastening piece and the second fastening piece. The main shaft penetrates through the second connection rod, and the main shaft and the second connection rod are fastened to each other in the radial direction of the main shaft. One end of the first connection rod is rotatably connected to the connection piece, and the other end of the first connection rod is rotatably connected to the second connection rod. One end of a rotating shaft rotatably connected to the first connection rod and the second connection rod is located in the first slide slot, and the other end of the rotating shaft is located in the second slide slot. The support assembly according to claim 2.

9. The connection piece has a body portion. The body portion has a first edge portion and a second edge portion arranged opposite to each other. A first installation portion, a second installation portion, and a third installation portion are arranged on the first edge portion. The first installation portion and the second installation portion are spaced apart. The body portion has a first surface and a second surface arranged opposite to each other. The first installation portion and the second installation portion extend in a direction away from the second surface. The third installation portion is located on the second surface, and the third installation portion extends along a direction from the first edge portion to the second edge portion. The rotating assembly further includes two intermediate connecting rods. One end of one of the intermediate connecting rods is rotatably connected to the first installation portion, and the other end of the one intermediate connecting rod is rotatably connected to the first fastening piece; one end of the other intermediate connecting rod is rotatably connected to the second installation portion, and the other end of the other intermediate connecting rod is rotatably connected to the second fastening piece; one end of the first connecting rod, which faces the connecting piece, is rotatably connected to an end of the third installation portion that is away from the first edge. The support assembly according to claim 8.

10. The first support board is fixedly connected to the first surface of the connecting piece. The support assembly according to claim 9.

11. The rotating assembly further has a first elastic piece. The first elastic piece is disposed on a side portion of the first fastening piece that is away from the second fastening piece. An elastic force generated by the first elastic piece along the axial direction of the main shaft is applied to the first fastening piece. The support assembly according to claim 2.

12. The rotating assembly further has a first extrusion structure. The first extrusion structure is located between the first fastening piece and the first elastic piece. The first extrusion structure is disposed in a sleeve shape on the main shaft. The first extrusion structure and the main shaft are fastened to each other in the radial direction of the main shaft. When the first extrusion structure rotates with the main shaft, the deformation amount of the first elastic piece changes. The support assembly according to claim 11.

13. The first elastic piece presses the first extrusion structure toward the first fastening piece. A first slot is disposed on an end surface of the first extrusion structure that faces the first fastening piece. A first protrusion is disposed on an end surface of the first fastening piece that faces the first extrusion structure. The support assembly according to claim 12.

14. The rotation assembly further has a second extrusion structure, the second extrusion structure is located between the first extrusion structure and the first fastening piece, the second extrusion structure is arranged in a sleeve shape on the main shaft, the main shaft is rotatably connected to the second extrusion structure, the first elastic piece presses the first extrusion structure toward the second extrusion structure, a first slot is arranged on a multi-faceted surface of the first extrusion structure at an end surface facing the first fastening piece, and a first protrusion is arranged on a multi-faceted surface of the second extrusion structure at an end surface facing the first extrusion structure. The support assembly according to claim 12.

15. The rotation assembly further has a second elastic piece, the second elastic piece is arranged at a side portion of the second fastening piece and away from the first fastening piece; alternatively, a hollow region is arranged in the second connecting rod, and the second elastic piece is arranged in the hollow region. The second elastic piece is formed in a sleeve shape on the main shaft, one end of the second elastic piece is fixedly connected to the main shaft, and the other end of the second elastic piece is fixedly connected to the second fastening piece; the main shaft rotates, and the second elastic piece generates an elastic force around the axial direction of the main shaft. The support assembly according to claim 8.

16. The keyboard body has a rotating shaft connection piece, a frame assembly, and keys, and the rotating shaft mechanism moves to drive the rotating shaft connection piece to move along a direction toward or away from the rotating shaft mechanism. The keys are in a plurality of parallel rows, each row of the keys has a plurality of keys, and the keys are accommodated in key slots of the keyboard body. The frame assembly has a first frame, a second frame, and a horizontal rod, the first frame and the second frame are arranged opposite to each other, the first frame and the second frame are fixedly connected to the rotating shaft connection piece, a plurality of rows of the keys are located between the first frame and the second frame, and each row of the keys is arranged along a direction from the first frame to the second frame. One horizontal rod is arranged corresponding to each column of the keys, and the first frame and the second frame move along a direction towards or away from the rotary shaft mechanism together with the rotary shaft connection piece to drive the horizontal rod to move along the arrangement direction of each column of the keys. Along with the movement of the horizontal rod, the keys move in a direction towards the key slots or move out of the key slots. The support assembly according to claim 5.

17. The rotary assembly further has a third connecting rod, and the third connecting rod is slidably connected to the second fastening piece; along with the rotation of the main shaft, the third connecting rod slides along a direction towards or away from the keyboard body; the rotary shaft connection piece is fixedly connected to the third connecting rod. The support assembly according to claim 16.

18. A sliding part is arranged on the second fastening piece, the third connecting rod can slide along the sliding part, the rotary assembly further has a fourth connecting rod, the fourth connecting rod is fixedly connected to the second fastening piece, and the third connecting rod is restricted within the slide. The support assembly according to claim 17.

19. An electronic device having a host and the support assembly according to any one of claims 1 to 18, wherein the host is removably connected to the first support board within the support assembly.

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