Keyboard Assembly and Electronic Device

Abstract

A keyboard assembly and an electronic device are provided. The assembly includes a keyboard body and a drive mechanism. The keyboard body includes a frame assembly and keys. The keys are arranged in parallel in a plurality of rows, each of which includes a plurality of keys, and the keys are positioned in key slots on the keyboard body. The frame assembly includes a first frame and a crossbar, and the drive mechanism drives the first frame to move in the arrangement direction of the plurality of key rows. One crossbar is arranged corresponding to each key row, and the crossbar moves in the arrangement direction of each key row as the first frame moves, and the keys move toward the slots or in a direction to expose them as the crossbar moves. In this way, input operations are performed via the keys. Since the keys move in a direction toward the corresponding slots, the space occupied by the keys in the thickness direction of the keyboard assembly is reduced, and a slim design for the electronic device is realized.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims priority to Chinese Patent Application No. 202111165406.1, titled "Keyboard Assembly and Electronic Device", filed with the China National Intellectual Property Administration on September 30, 2021, the entire content of which is incorporated herein by reference.

[0002] This application relates to the field of electronic device technology, and in particular, to a keyboard assembly and an electronic device.

Background Art

[0003] As people's daily lives become richer and more economic and commercial activities are carried out, portable electronic devices with keyboard input such as laptops have become one of the indispensable terminal products. The keyboard, which is an important part of these portable electronic devices, not only has a delicate appearance that can bring a good visual experience to consumers, but also provides a key - pressing experience, which is one of the user experiences (UX) that consumers attach great importance to.

[0004] Consumers who frequently use keyboards are likely to perform many keyboard input operations throughout the day, especially when consumers use portable electronic devices for work. Therefore, the experience of pressing keys on the keyboard becomes increasingly important. As portable electronic devices develop and become smaller and thinner, the size of the keyboard becomes smaller and the thickness of the keyboard becomes thinner. The thickness of the keyboard directly affects the size of the key stroke, posing a higher challenge to maintaining and improving the key - pressing experience.

[0005] Therefore, how to enable the keyboard to conform to the development trend of being lightweight, thin, and portable while providing a smooth and comfortable user experience to the user has become an urgent issue to be solved by those skilled in the art.

Summary of the Invention

Problems to be Solved by the Invention

[0006] This application provides a keyboard assembly and an electronic device such that the keyboard assembly can meet the design requirements of being thin, lightweight, and portable, thereby realizing a small, thin, and lightweight design of the electronic device and improving the user experience.

Means for Solving the Problems

[0007] According to a first aspect, a keyboard assembly is provided. The keyboard assembly may include a keyboard body and a driving mechanism. The keyboard body includes a frame assembly and keys. In the present application, the keys may be arranged in parallel in a plurality of columns, each key column includes a plurality of keys, and the number of keys in each column may be the same or different. This is not particularly limited in the present application. Key slots may be arranged on the keyboard body, and the keys may be received in the corresponding key slots. Further, when the frame assembly is specifically arranged, the frame assembly may include a first frame and a plurality of crossbars. One crossbar is correspondingly arranged for each key column. When the driving mechanism drives at least a part of the first frame to move in the arrangement direction of the plurality of key columns, each crossbar may move in the arrangement direction of each key column along with the movement of at least a part of the first frame in the arrangement direction of the plurality of key columns. Further, each key column may move in a direction towards the key slot or in a direction to expose the key slot along with the movement of each crossbar. Based on this, when the keyboard assembly is in a use state, in order to meet the user's usage requirements for tap input, the keys may move to a set stroke in a direction to expose the key slots. Further, when the keyboard assembly is not in use, the keys may move in a direction towards the key slots. In this way, the portion of the key exposed to the key slot is small, and the size of the keyboard assembly in the thickness direction is small. This facilitates the realization of a thin design of the keyboard assembly.

[0008] In one possible embodiment of 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 connected to the drive mechanism, and the first inner frame is located on the side of the first outer frame facing the key. The first outer frame and the first inner frame may be connected. During specific implementation, the 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 the fixed mechanical component on the keyboard body. In this way, when the first outer frame moves in the arrangement direction of a plurality of key columns together with the drive mechanism, the first inner frame can be driven to move in a direction approaching the first outer frame or away from the first outer frame. Furthermore, since one end of each crossbar can be fixedly connected to the first inner frame, when the first inner frame moves, each crossbar can move in the arrangement direction of each key column together with the first inner frame.

[0009] The frame assembly may further include a second frame. The first frame and the second frame may be arranged opposite to each other, and the drive mechanism may further drive the second frame to move in the arrangement direction of the plurality of key columns. The aforementioned plurality of key columns may be located between the first frame and the second frame, and each key column may be arranged in the direction from the first frame to the second frame. 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 connected to the drive mechanism, and the second inner frame is located on the side of the second outer frame facing the keys. The second outer frame and the second inner frame may be connected. During specific implementation, the 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 fixed mechanical component on the keyboard body. In this way, when the second outer frame moves in the arrangement direction of the plurality of key columns together with the drive mechanism, the second inner frame can be driven to move in a direction approaching the first outer frame or away from the first outer frame.

[0010] In this application, in the process where the first outer frame and the second outer frame move in the arrangement direction of the plurality of key columns together with the drive mechanism, the first inner frame and the second inner frame can be driven to move in the same direction as the arrangement direction of each key column. In this way, one end of the crossbar can be fixedly connected to the first inner frame, and the other end of the crossbar can be fixedly connected to the second inner frame, so that the crossbar can move in the arrangement direction of each key column. Furthermore, the simultaneous movement of the first inner frame and the second inner frame drives the crossbar to move in the arrangement direction of each key column. This can effectively improve the stability of the movement of the crossbar.

[0011] In addition to arranging the frame assembly in the present application as described above, in another possible embodiment of the present application, the first frame is provided with a first guide groove, the crossbar is provided with a first pin head, and the first pin head can be inserted into the first guide groove. In the process of the first frame moving in the arrangement direction of a plurality of key columns, the first pin head is driven to slide along the first guide groove, and the crossbar can be driven to move in the arrangement direction of each key column.

[0012] The movement locus of the first pin head along the first guide groove is the key to enabling the movement of the first frame to drive the crossbar to move in the arrangement direction of each key column. In one possible embodiment of the present application, the movement locus of the first pin head along the first guide groove can be adapted based on the force state in the process of the key moving in the direction towards the key slot. During specific implementation, the movement locus of the first pin head along the first guide groove can be divided into a continuous first locus portion and a second locus portion, and the included angle between the first locus portion and the extension direction of the crossbar is smaller than the included angle between the second locus portion and the extension direction of the crossbar. In this way, when the first pin head moves along the first locus portion and the second locus portion, the movement speed of the key cap in the first locus portion is accelerated, and the movement speed of the key cap in the second locus portion is decelerated, so that the supporting force acting on the key cap becomes closer. Therefore, the force received by the key throughout the pressing process becomes more uniform.

[0013] Furthermore, when the frame assembly further includes a second frame, the first frame and the second frame may be arranged opposite to each other, and the drive mechanism may further drive the second frame to move in the arrangement direction of the plurality of key columns. The aforementioned plurality of key columns may be located between the first frame and the second frame, and each key column may be arranged in the direction from the first frame to the second frame. Similarly, when the second frame is specifically arranged, the second frame may be provided with a second guide groove, and the crossbar may be provided with a second pin head, and the second pin head may be inserted into the second guide groove. In the process of the second frame moving in the arrangement direction of the plurality of key columns, the second pin head is driven to slide along the second guide groove, and the crossbar can be driven to move in the arrangement direction of each key column. Furthermore, the simultaneous movement of the first frame and the second frame drives the crossbar to move in the arrangement direction of each key column. This can effectively improve the stability of the movement of the crossbar.

[0014] Similar to the arrangement method of the first guide groove, when the second guide groove is specifically arranged, the movement locus of the second pin head along the second guide groove can be divided into a continuous third locus portion and a fourth locus portion, and the included angle between the third locus portion and the extension direction of the crossbar is smaller than the included angle between the fourth locus portion and the extension direction of the crossbar. In this way, when the second pin head moves along the third locus portion and the fourth locus portion, the movement speed of the key cap in the third locus portion is accelerated, and the movement speed of the key cap in the fourth locus portion is decelerated, so that the supporting forces acting on the key cap are closer. Therefore, the force received by the key during the entire pressing process becomes more uniform.

[0015] In one possible embodiment of the present application, the keyboard assembly may further include a rotary shaft mechanism, and the rotary shaft mechanism can be used as a reading mechanism. Further, the keyboard body may further include a rotary shaft connecting piece, the rotary shaft connecting piece is connected to the rotary shaft mechanism, and the rotary shaft connecting piece can move along with the movement of the rotary shaft mechanism. Specifically, when the rotary shaft mechanism moves, the rotary shaft connecting piece can be driven to move in a direction towards the rotary shaft mechanism or away from the rotary shaft mechanism. Further, the first frame, together with the rotary shaft connecting piece, moves in a direction approaching the rotary shaft mechanism or away from the rotary shaft mechanism, and can drive the crossbar to move in the arrangement direction of each key column.

[0016] In one possible embodiment of the present application, in order to enable the rotary shaft mechanism to drive the rotary shaft connecting piece to move, when the rotary shaft mechanism is specifically arranged, the rotary shaft mechanism may include a rotary assembly, and the rotary assembly may include a main shaft and a connecting rod, and the connecting rod slides in a direction approaching the keyboard body or away from the keyboard body along with the rotation of the main shaft. In this way, the rotary shaft connecting piece can be fixedly connected to the connecting rod, so the connecting rod drives the rotary shaft connecting piece to slide in a direction approaching the keyboard body or away from the keyboard body.

[0017] In the present application, in order to realize the sliding of the connecting rod, the rotary assembly may further include a fastening piece, the main shaft is rotatably connected to the fastening piece, and the connecting rod is slidably connected to the fastening piece. Further, a stopper portion is provided on the main shaft, and a track groove is arranged on the end face of the stopper portion facing the connecting rod. Correspondingly, the connecting rod has a connecting portion, and the connecting portion is inserted into the track groove. In this way, during the rotation of the main shaft, the connecting portion is driven to slide in the track groove, and the connecting rod can be pushed to slide in a direction approaching the keyboard body or away from the keyboard body.

[0018] In addition to the foregoing embodiments, the sliding of the connecting rod can be further realized in another possible manner. For example, the rotating assembly may further include a pendulum rod structure, and the pendulum rod structure is sleeved on the main shaft. In the radial direction of the main shaft, the pendulum rod structure is fixedly connected to the main shaft, and the pendulum rod structure has a protrusion. Further, the connecting rod has a connecting portion, a track groove is provided in the connecting portion, and a recess is provided in the track groove. In this way, when the pendulum rod structure rotates with the main shaft, the protrusion can be driven to slide along the track groove, and when the protrusion extends into the recess, the connecting rod can be driven to slide in the chute in a direction approaching the keyboard body or away from the keyboard body.

[0019] In addition to using a rotating shaft mechanism as a driving mechanism for moving the frame assembly in the present application, in one possible embodiment, the driving mechanism may alternatively be an electric driving mechanism, and the electric driving mechanism may be arranged on the keyboard body. Arranging the driving mechanism as an electric driving mechanism can prevent the movement of the frame assembly from being affected by the arrangement of the rotating shaft mechanism, thereby helping to simplify the structure of the keyboard assembly. Further, this also helps to enhance the technical meaning of the design of the keyboard assembly and further improve the user experience.

[0020] Furthermore, when the crossbar moves in the arrangement direction of each key column, in order to enable the keys to move in the direction towards the key slot or in the direction of exposing the key slot as the crossbar moves, in one possible embodiment of the present application, for the correspondingly arranged key columns and crossbar, each key may include a key cap and a lifting mechanism. The lifting mechanism may be located within the key slot, the key cap covers the lifting mechanism, and the lifting mechanism can be used to drive the key cap to reciprocate in the direction towards the key slot or in the direction of exposing the key slot. Furthermore, a first abutting structure is provided on the crossbar, and a second abutting structure is provided on the lifting mechanism. When the crossbar moves in the arrangement direction of the keys, the crossbar can drive the first abutting structure to press the second abutting structure, and press the lifting mechanism towards the key slot. In this case, the key slot is driven by the lifting mechanism to move in the direction towards the key slot. When the pressing force between the first abutting structure and the second abutting structure is released, it will be understood that the lifting mechanism can rise in the direction of exposing the key slot and drive the key cap to move in the direction of exposing the key slot.

[0021] In the present application, the keyboard body may be provided with a plurality of key slots, and a plurality of first abutting structures may be provided on the crossbar. At least one abutting structure may be accommodated in each key slot. For example, two abutting structures may be accommodated in each key slot, whereby a stable pressing force can be applied to the lifting mechanism.

[0022] In order to enhance the reliability of the contact between the first abutting structure and the second abutting structure, force transmission may be performed in a surface contact manner between the first abutting structure and the second abutting structure. For example, the first abutting structure may have a first inclined surface, the second abutting structure may have a second inclined surface, and the first inclined surface and the second inclined surface may be arranged opposite to each other. In this way, when the crossbar moves in the arrangement direction of each key column, the first inclined surface can contact the second inclined surface, so that the lifting mechanism can move in the direction towards the key slot.

[0023] In one possible embodiment of the present application, the keyboard body may further include a bottom plate and a keyboard cover plate. The keyboard cover plate covers the bottom plate to form an accommodation space between the bottom plate and the keyboard body. In this embodiment, the key slot may be disposed on the keyboard cover plate. When the key moves in a direction to expose the key slot until the speed of the key decreases to zero, the height of the key protruding from the keyboard cover plate is the largest. In this case, the user can realize the input function of the keyboard assembly by pressing the key. Further, when the key moves in a direction to expose the key slot until the speed of the key decreases to zero, the height of the key protruding from the keyboard cover plate is the smallest. In this case, since the external space occupied by the key on the keyboard body is small, the overall thickness of the keyboard cover plate is small.

[0024] When the keyboard body includes a bottom plate, chutes may be further arranged on the bottom plate, and each crossbar can move along one chute. This can effectively improve the stability of the movement of the crossbar and further improve the consistency of the movement of each key column arranged corresponding to each crossbar.

[0025] According to a second aspect, an electronic device is provided. The electronic device may include a display screen and the keyboard assembly of the first aspect. The display screen is rotatably coupled to the keyboard body via a rotating shaft mechanism. In the present application, the rotating shaft mechanism may be fixedly coupled to the keyboard body, or the rotating shaft mechanism may be a part of the keyboard assembly. Alternatively, the rotating shaft mechanism does not belong to the keyboard assembly and is a structure of the electronic device. The electronic device provided in the present application is used such that when the electronic device is in an unfolded state, the keys can move to a set stroke in a direction to expose the key slots in order to meet the user's usage requirements for input by key pressing. Further, when the electronic device is closed, the keys can move in a direction towards the key slots. In this way, the portion of the keys exposed to the key slots is small, and the size of the keyboard assembly in the thickness direction of the whole is small. This helps to achieve a thin design of the keyboard assembly. Therefore, the electronic device can be designed to be thin in the closed state.

[0026] The electronic device may be a user terminal including a display screen and a processor, such as a notebook computer.

[0027] According to a third aspect, another electronic device is provided. The electronic device includes a host and the keyboard assembly of the first aspect, and the host may be rotatably connected to the keyboard body via a rotary shaft mechanism. In the present application, the rotary shaft mechanism may be fixedly connected to the keyboard body, or the rotary shaft mechanism may be a part of the keyboard assembly. The electronic device provided in the present application is used such that when the electronic device is in a deployed state, the keys can move to a set stroke in a direction to expose the key slots in order to meet the user's usage requirements for input by key pressing. Further, when the electronic device is closed, the keys can move in a direction toward the key slots. In this way, the portion of the key exposed to the key slot is small, and the size of the keyboard assembly in the thickness direction as a whole is small. This helps to achieve a thin design of the keyboard assembly. Therefore, the electronic device can be designed to be thin in the closed state.

[0028] The host may be a user terminal including a display screen and a processor, such as a tablet computer.

Brief Description of the Drawings

[0029]

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Mode for Carrying Out the Invention

[0030] To make the object, technical solution, and advantages of the present application more clear, the following will further describe the present application in detail with reference to the accompanying drawings.

[0031] First, the application scenarios of the keyboard assembly provided in the present application will be described below. The keyboard assembly provided in the embodiments of the present application may be used in, but is not limited to, portable notebook computers, small keyboards adapted to mobile phones, folding devices such as computers, or may be used as a keyboard kit for light office tablet computers, personal digital assistants (PDAs), etc.

[0032] Since the keyboard is used as the main input device in application scenarios such as offices and games, users have increasingly high expectations for various features of the keyboard. To cope with the current development trend of electronic devices, that is, electronic devices are becoming lighter, thinner, and smaller, the thickness of the keyboard becomes thinner. Accordingly, the key stroke on the keyboard becomes shallower. When a user strikes the keyboard, the key usually contacts the support structure of the keyboard when the key is pressed to the lowermost end. This gives the user a feeling of hitting a hard object and causes finger fatigue after the user uses the keyboard for a long time. As a result, the user experience is affected.

[0033] The keyboard assembly provided in this application is used to solve the foregoing problems. When an input operation is performed via a key, the key can rise and be exposed on the surface of the keyboard assembly, and when the keyboard assembly is not in use, the key can descend and be hidden within the keyboard assembly. Accordingly, the electronic device using the keyboard assembly can be designed to be thin, and in order to improve the user experience, the key stroke when an input operation is performed via the keyboard assembly can be maintained or even improved. To facilitate the understanding of the keyboard assembly provided in this application and the electronic device using the keyboard assembly, the following will describe the keyboard assembly in detail with reference to specific embodiments.

[0034] The terms used in the following embodiments are merely intended to describe specific embodiments and are not intended to limit this application. The singular terms "one", "a", "the foregoing", "this", and "the one" used in this specification and the appended claims of this application are intended to include expressions such as "one or more" unless specifically specified otherwise in the context.

[0035] References to "one embodiment" or "some embodiments" described in this specification mean that the specific features, structures, or characteristics described in combination with this embodiment are included in one or more embodiments of this application. Thus, descriptions such as "in one embodiment", "in some embodiments", "in some other embodiments", "in yet some other embodiments" that appear in various places in this specification do not necessarily refer to the same embodiment. Instead, these descriptions mean "one or more embodiments but not all embodiments" unless otherwise particularly emphasized. The terms "include", "comprise", "have", and their variants all mean "include but not limited to" unless otherwise particularly emphasized.

[0036] FIG. 1 is a schematic diagram of an application scenario of a keyboard assembly according to an embodiment of this application. In this embodiment, the structure of an electronic device is shown. The electronic device may be a notebook computer, and in this case, the electronic device is in an unfolded state. The electronic device includes a display screen 1 and a keyboard assembly 2, and the display screen 1 is rotatably connected to the keyboard assembly 2 via a rotation shaft mechanism 3. In this embodiment, the rotation shaft mechanism 3 may be regarded as a part of the keyboard assembly 2, or the rotation shaft mechanism 3 does not belong to the keyboard assembly 2 and is used as an assembly of the electronic device, and it will be understood that both the display screen 1 and the keyboard assembly 2 may be rotatably connected to the rotation shaft mechanism 3.

[0037] Generally, the display screen 1 can be configured to realize a display function and can display the content input via the keyboard assembly 2. The keyboard assembly 2 may include a keyboard body 201, and the keyboard body 201 can be configured to realize the input function of an electronic device. The keyboard body 201 may include keys 2011, a keyboard cover plate 2012, and a bottom plate 2013. The keyboard cover plate 2012 covers the bottom plate 2013 to form an accommodation space between the bottom plate 2013 and the keyboard cover plate 2012. Key slots (not shown in FIG. 1a) are arranged on the keyboard cover plate 2012, and the keys 2011 may be installed in the key slots. Since the keys 2011 can protrude from the surface of the keyboard cover plate 2012, the functions of the keys 2011 can be realized by pressing the keys 2011. When the electronic device is closed, it can be understood that the display screen 1 can rotate in the direction towards the keys 2011 of the keyboard body 201.

[0038] Furthermore, a control circuit, a battery, several sensors (such as an infrared sensor, an ultrasonic sensor, a fingerprint sensor), etc. can be 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 sensors can be arranged to provide functions such as signal triggering. Furthermore, the battery in the keyboard body 201 can be used to maintain the normal operating state of the keyboard body 201 when there is no external power source.

[0039] FIG. 1b is a schematic diagram of an application scenario for a keyboard assembly 2 according to another embodiment of the present application. In this embodiment, the electronic device may include the keyboard assembly 2, and the keyboard assembly 2 may include a keyboard body 201. Further, the electronic device may further include a support portion 4. The keyboard body 201 may be rotatably coupled to the support portion 4 via a rotary shaft mechanism 3. In this embodiment, the rotary shaft mechanism 3 may be fixedly coupled to the keyboard body 201 and may be regarded as a part of the keyboard assembly 2, or the rotary shaft mechanism 3 does not belong to the keyboard assembly 2 and is used as an assembly of the electronic device, and it will be understood that both the support portion 4 and the keyboard body 201 can rotate with respect to the rotary shaft mechanism 3.

[0040] The support portion 4 may be formed by connecting a plurality of support plates. For example, the support portion 4 may include a first support plate 401, a second support plate 402, and a third support plate 403. The second support plate 402 is located between the first support plate 401 and the third support plate 403, and one end of the second support plate 402 is hinged to a surface of the first support plate 401 that is spaced apart from the keyboard assembly 2, and the other end of the second support plate 402 is hinged to the third support plate 403. Further, the third support plate 403 may slide in a direction toward the keyboard assembly 2 or away from the keyboard assembly 2.

[0041] In the embodiment shown in FIG. 1b, the electronic device is in the deployed state, and the portions of the first support plate 401, the second support plate 402, and the third support plate 403 of the support portion 4 disposed around the rotary shaft mechanism 3 form a triangular support structure. In the process of deploying and closing the electronic device, the triangular support structure can form a stable support structure and can be further used to stabilize the relative rotation process between the support portion 4 of the electronic device and the keyboard assembly 2, so the structure of the electronic device is highly reliable. In this embodiment, it will be understood that when the electronic device is closed, the first support plate 401 can rotate in the direction towards the key 2011 of the keyboard assembly 2.

[0042] FIG. 1c is a schematic diagram of an application scenario for the keyboard assembly 2 according to another embodiment of the present application. In this embodiment, the electronic device may include a host 5 and a keyboard assembly 2. The host 5 is detachably connected to the keyboard assembly 2. In the present application, the host 5 is a product with a complete structure and complete functions. After being detached from the keyboard assembly 2, the host 5 can still be used as an independent electronic device for use. For example, the host 5 may be a tablet computer. The host 5 in the present application may include, but is not limited to, a display screen, a battery module, a calculation and storage module, etc. Further, the host 5 may be further provided with a contact or connector interface used for matching with an external device to realize a wired connection between the host 5 and the external device, for example, a pogo pin, a USB, or a Type-A or Type-C connection interface. Alternatively, the host 5 may have a functional module such as Bluetooth or wifi to realize a wireless connection between the host 5 and the external device. In the present application, the type of the host 5 is not particularly limited. The host 5 may be the aforementioned tablet computer, PDA, etc., but is not limited thereto.

[0043] In this embodiment, the keyboard assembly 2 may include a keyboard body 201, the electronic device may further include a support portion 4, and the keyboard body 201 may be rotatably connected to the support portion 4 via a rotating shaft mechanism 3. In this embodiment, the rotating shaft mechanism 3 may be fixedly connected to the keyboard body 201 and regarded as a part of the keyboard assembly 2, or the rotating shaft mechanism 3 does not belong to the keyboard assembly 2 and is used as an assembly of the electronic device, and it will be understood that both the support portion 4 and the keyboard body 201 can rotate relative to the rotating shaft mechanism 3.

[0044] The support portion 4 may be formed by connecting a plurality of support plates. For example, the support portion 4 may include a first support plate 401, a second support plate 402, and a third support plate 403. The first support plate 401 may be configured to support the host 5. In one possible embodiment of the present application, in order to fix the host 5 installed on the keyboard assembly 2 to the first support plate 401, a first magnetic element (not shown in FIG. 1c) may be disposed on the first support plate 401, a second magnetic element may be disposed at a corresponding position of the host 5, and the first magnetic element and the second magnetic element can adsorb to each other. In the present application, as long as the first magnetic element and the second magnetic element can be fastened to each other by mutual adsorption, the first magnetic element may be a magnetic element or an element that is not a magnetic body but can be adsorbed by a magnetic element. Similarly, the second magnetic element may be a magnetic element or an element that is not a magnetic body but can be adsorbed by a magnetic element. The second support plate 402 is located between the first support plate 401 and the third support plate 403. One end of the second support plate 402 is hinged to a surface of the first support plate 401 that is separated from the keyboard body 201, and the other end of the second support plate 402 is hinged to the third support plate 403. Further, the third support plate 403 can slide in a direction towards the keyboard body 201 or away from the keyboard body 201.

[0045] In the embodiment shown in FIG. 1c, the electronic device is in a deployed state, and the portions of the first support plate 401, the second support plate 402, and the third support plate 403 of the support portion 4 disposed around the rotation shaft mechanism 3 form a triangular support structure. In the process of deploying and closing the keyboard assembly 2, the triangular support structure can achieve stable support for the host 5 and can be further used to stabilize the relative rotation process between the support portion 4 of the keyboard assembly 2 and the keyboard main body 201. Therefore, the structure of the keyboard assembly 2 is highly reliable. In this embodiment, it will be understood that when the electronic device is closed, the host 5 can rotate in the direction towards the keys 2011 of the keyboard main body 201.

[0046] From the description of the foregoing embodiments, it can be seen that when the electronic device performs an input operation via the keyboard assembly 2, the keys 2011 protrude from the surface of the keyboard cover plate 2012. However, when the electronic device is in a closed state, if the keys 2011 still protrude from the surface of the keyboard cover plate 2012, the portions of the keys 2011 protruding from the surface of the keyboard cover plate 2012 also occupy the space in the thickness direction of the entire electronic device. Based on this, the present application provides a solution to enable the keys 2011 to rise or fall so that the keys 2011 can rise from the corresponding key slots and protrude from the surface of the keyboard cover plate 2012 in order to facilitate the user's input operation of pressing the keys 2011 when the keys 2011 are in use. In this state, the key stroke is appropriately designed to improve the user experience of pressing the keys 2011. Further, when the electronic device is in a closed state, the keys 2011 move in the direction towards the key slots to reduce the height of the keys 2011 protruding from the surface of the keyboard cover plate 2012, and the keys 2011 can even be completely hidden in the corresponding key slots. In this way, the space occupied by the keys 2011 in the thickness direction of the entire electronic device can be reduced. Therefore, the electronic device can be designed to be thinner in the closed state.

[0047] Refer to FIG. 2 for the specific implementation. FIG. 2 is a schematic diagram of a partial structure of the keyboard body 201 according to one possible embodiment of the present application. From FIG. 2, it can be seen that the keys 2011 on the keyboard body 201 may be arranged in parallel in a plurality of columns, and each column of keys 2011 includes a plurality of keys 2011. Furthermore, the number of keys 2011 in each column may be the same or different.

[0048] FIG. 3a is a schematic diagram of the overall structure of the keyboard body 201 according to the present application. In FIG. 3a, in order to better show the internal structure of the keyboard body 201, structures such as the keys 2011 and the keyboard cover plate 2012 shown in FIG. 2 are omitted. From FIG. 3a, it can be seen that a rotary shaft connecting piece 2014 is arranged at one end of the keyboard body 201, and the rotary shaft connecting piece 2014 can be arranged in a long strip structure, although not limited thereto. Furthermore, the rotary shaft connecting piece 2014 can be connected to the rotary shaft mechanism 3, and the rotary shaft connecting piece 2014 can move in the direction towards the rotary shaft mechanism 3 or away from the rotary shaft mechanism 3 as the rotary shaft mechanism 3 rotates.

[0049] FIG. 3b is a schematic view of the structure of the keyboard body 201 shown in FIG. 3a from another angle. The keyboard body 201 may further include a frame assembly 2015, and the frame assembly 2015 includes a first frame 20151, a second frame 20152, and a cross bar 20153. The first frame 20151 and the second frame 20152 are arranged opposite to each other, and both the first frame 20151 and the second frame 20152 are fixedly connected to the rotating shaft connecting piece 2014. The connecting method is not limited to this, and it may be a fixed connection by using a fastener such as a screw. In this way, the rotating shaft mechanism 3 can be used as a driving mechanism for moving the frame assembly 2015. When the rotating shaft connecting piece 2014 moves together with the rotating shaft mechanism 3, the first frame 20151 and the second frame 20152 can be driven to move synchronously together with the rotating shaft connecting piece 2014.

[0050] FIG. 4 is a schematic view of a partial structure of the keyboard body 201 after the keyboard cover plate 2012 of the keyboard body 201 in FIG. 2 is removed. From FIG. 4, it can be seen that a plurality of rows of keys 2011 arranged in parallel are located between the first frame 20151 and the second frame 20152, and each row of keys 2011 is arranged in the direction from the first frame 20151 to the second frame 20152.

[0051] FIG. 5 is a schematic view of the structure of the keyboard body 201 shown in FIG. 4 from another angle. In this embodiment, there are a plurality of cross bars 20153, and one cross bar 20153 is correspondingly arranged for each key column. The length direction of the cross bar 20153 is the same as the arrangement direction of each row of keys 2011. Further, the cross bar 20153 may be arranged on the side of the corresponding key 2011 facing the rotating shaft mechanism 3 shown in FIG. 3a, or may be arranged on the side of the corresponding key 2011 away from the rotating shaft mechanism 3. This is not particularly limited in this application.

[0052] In this application, the first frame 20151 and the second frame 20152 can drive the crossbar 20153 to move in the longitudinal direction of the crossbar 20153. Refer to FIG. 6 for a specific implementation. FIG. 6 is an enlarged view of a partial structure of the keyboard body 201 shown in FIG. 5. In this application, the first frame 20151 includes a first inner frame 201511 and a first outer frame 201512. The first inner frame 201511 and the first outer frame 201512 are arranged side by side, and the first inner frame 201511 is located on the side of the first outer frame 201512 facing the key 2011. Further, the first outer frame 201512 is configured to be fixedly connected to the rotating shaft connecting piece 2014 shown in FIG. 3a, and the first inner frame 201511 is fixedly connected to a plurality of crossbars 20153. The connection method is not limited to this, but may be a fixed connection by using fasteners such as screws. The first outer frame 201512 can be connected to the first inner frame 201511 via the first connecting rod assembly 2016.

[0053] FIG. 7 is an enlarged view of the partial structure at A in FIG. 6. In the present application, the first connecting rod assembly 2016 includes a first connecting rod 20161 and a second connecting rod 20162. The first end 201611 of the first connecting rod 20161 is hinged to the first inner frame 201511, and the second end 201612 of the first connecting rod 20161 is hinged to the first outer frame 201512. The first connecting rod 20161 can be hinged to both the first inner frame 201511 and the first outer frame 201512 by using, but not limited to, a pin shaft. The first end 201621 of the second connecting rod 20162 is hinged to the rod body of the first connecting rod 20161, and the rod body of the first connecting rod 20161 is the portion of the first connecting rod 20161 located between the first end 201611 and the second end 201612. The second end 201622 of the second connecting rod 20162 can be hinged to another mechanical component on the keyboard body 201. It should be noted that another mechanical component on the keyboard body 201 may be any mechanical component having a fixed position on the keyboard body 201. In the present application, a position-fixed mechanical component is a mechanical component whose position does not change regardless of the operating state of the keyboard assembly. For example, the keyboard cover plate 2012 shown in FIG. 2 is a position-fixed structure on the keyboard body 201. Similarly, the second connecting rod 20162 can be hinged to the first connecting rod 20161 and a mechanical component on the keyboard body 201 by using, but not limited to, a pin shaft. Further, in one possible embodiment of the present application, the second end 201622 of the second connecting rod 20162 can be located on the side of the first end 201621 away from the first inner frame 201511.

[0054] Continuing to refer to FIG. 6. 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 keys. Further, the second outer frame 201522 is configured to be fixedly connected to the rotary shaft connecting piece 2014 shown in FIG. 3a. The second inner frame 201521 is fixedly connected to a plurality of crossbars 20153. The connection method is not limited to this, but may be a fixed connection by using fasteners such as screws. The second outer frame 201522 can be connected to the second inner frame 201521 via a second connecting rod assembly 2017. The second connecting rod assembly 2017 includes a third connecting rod and a fourth connecting rod. Similar to the first frame 20151 side, in the present application, the first end of the third connecting rod is hinged to the second inner frame 201521, and the second end of the third connecting rod is hinged to the second outer frame 201522. The third connecting rod is not limited to this, but can be hinged to both the second inner frame 201521 and the second outer frame 201522 by using a pin shaft. 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 another mechanical component on the keyboard body 201. For example, it can be hinged to the keyboard cover plate 2012. Similarly, the fourth connecting rod is not limited to this, but can be hinged to the third connecting rod and the mechanical component on the keyboard body 201 by using a pin shaft. Further, in one possible embodiment of the present application, the second end of the fourth connecting rod may be located on the side of the first end away from the second inner frame 201521.

[0055] Continue to refer to FIG. 7. In FIG. 7, the XY coordinate system indicates the moving directions of the first frame 20151 and the crossbar 20153. The positive direction of the Y-axis points to the rotating shaft mechanism 3 (not shown in FIG. 7. For the rotating shaft mechanism 3, please refer to FIG. 3a), and the positive direction of the X-axis points to the second frame 20152 (not shown in FIG. 7. For the second frame 20152, please refer to FIG. 6). Further, in the present application, the positive direction of the X-axis may be the same as or opposite to the arrangement direction of each key 2011 column, and the Y-axis may point to the arrangement direction of a plurality of key columns. The process in which the first frame 20151 drives the crossbar 20153 to move is described by using an example in which the electronic device using the keyboard assembly 2 shown in FIG. 7 is in the deployed state.

[0056] When the electronic device rotates from the deployed state shown in FIG. 7 to the closed state, since the rotating shaft mechanism 3 can drive the rotating shaft connecting piece 2014 to move in the positive direction of the Y-axis, the first outer frame 201512 moves in the positive direction of the Y-axis, and the second end 201612 of the first connecting rod 20161 moves in 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 second end 201612 of the first connecting rod 20161, the movement of the second end 201612 of the first connecting rod 20161 in the positive direction of the Y-axis means that the second end 201612 of the first connecting rod 20161 moves in the direction towards the second end 201622 of the second connecting rod 20162. Further, since 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 around the second end 201622.

[0057] FIG. 8 shows the relative positional relationship between the first connecting rod 20161 and the second connecting rod 20162 when the electronic device is in the closed state. By comparing FIG. 7 and FIG. 8, it can be seen that when the keyboard assembly 2 rotates from the deployed state shown in FIG. 7 to the closed state shown in FIG. 8, the included angle between the first connecting rod 20161 and the X-axis direction and the included angle between the second connecting rod 20162 and the X-axis direction decrease. In this case, both the first end 201611 of the first connecting rod 20161 and the first end 201621 of the second connecting rod 20162 move in the positive direction of the X-axis, pushing the first inner frame 201511 to move in the positive direction of the X-axis, and each crossbar 20153 is driven by the first inner frame 201511 to move in the direction towards the second frame 20152.

[0058] In the above process, it will be understood that the included angle between the third connecting rod and the X-axis direction and the included angle between the fourth connecting rod and the X-axis direction increase. In this case, both the first end of the third connecting rod and the first end of the fourth connecting rod move in the positive direction of the X-axis, driving the second inner frame 201521 to move in the positive direction of the X-axis, and each crossbar 20153 is driven by the second inner frame 201521 to move in the direction away from the first frame 20151.

[0059] Furthermore, when the electronic device rotates from the closed state shown in FIG. 8 to the deployed state shown in FIG. 7, each crossbar 20153 is driven by the first inner frame 201511 and the second inner frame 201521 to move in the negative direction of the X-axis.

[0060] In this application, when the keyboard assembly 2 rotates, the first outer frame 201512 and the second outer frame 201522 move in a direction towards the rotary shaft mechanism 3 or away from the rotary shaft mechanism 3, driving the first inner frame 201511 and the second inner frame 201521 to move in the same direction as the arrangement direction of each column of keys 2011. Therefore, the crossbar 20153 can move back and forth in the arrangement direction of each column of keys 2011 together with the first inner frame 201511 and the second inner frame 201521. Furthermore, each crossbar 20153 is arranged corresponding to a column of keys 2011. Based on this, in order to raise or lower the keys 2011 when the electronic device using the keyboard assembly 2 is in different folded states, a pressing mechanism can be arranged between the crossbar 20153 and the corresponding keys 2011. Therefore, the keys 2011 are pressed by the forward and backward movement of the crossbar 20153 to raise and lower the keys 2011.

[0061] For a specific implementation, refer to FIG. 9. FIG. 9 is an enlarged view of a partial structure of the crossbar 20153 according to one possible embodiment of this application. The crossbar 20153 may be provided with a first abutting structure 201531. There may be a plurality of first abutting structures 201531, and the first abutting structure 201531 may be specifically arranged based on the number of keys 2011 arranged corresponding to the crossbar 20153. In this embodiment of this application, a first inclined surface 2015311 may be provided on the first abutting structure 201531. Furthermore, the inclination angles of the first inclined surfaces 2015311 of the plurality of first abutting structures 201531 may be the same or different.

[0062] Furthermore, referring to FIG. 10, FIG. 10 shows a schematic view of the structure in which the crossbar 20153 shown in FIG. 9 is attached to the keyboard body 201. The keyboard body 201 has a plurality of key slots 20121, and correspondingly, each key slot 20121 can accommodate at least one first abutting structure 201531. For example, as shown in FIG. 10, each key slot 20121 may accommodate two first abutting structures 201531.

[0063] In this application, the key 2011 may include a key cap 20111 shown in FIG. 8 and a lifting mechanism 20112 shown in FIG. 11. The key cap 20111 may be configured to provide a pressing surface that withstands a pressing force. The lifting mechanism 20112 is disposed between the key cap 20111 and the bottom plate 2013 (refer to FIG. 1a), and the key cap 20111 covers and is fastened to the lifting mechanism 20112 to protect the lifting mechanism 20112. When no force is applied to the key 2011, the distance between the key cap 20111 and the bottom plate 2013 is the largest. When the key 2011 moves toward the bottom plate 2013 and the speed of the key 2011 decreases to zero, the distance between the key cap 20111 and the bottom plate 2013 is the smallest. Furthermore, when the distance between the key cap 20111 and the bottom plate 2013 is the largest, the lifting mechanism 20112 is in a deployed state, and when the distance between the key cap 20111 and the bottom plate 2013 is the smallest, the lifting mechanism 20112 is in a folded state. In this embodiment of the present application, the lifting mechanism 20112 can be used to drive the key cap 20111 to reciprocate in a direction toward the key slot 20121 or in a direction to expose the key slot 20121. In one aspect, the lifting mechanism 20112 can provide a driving force that enables the key cap 20111 to move in a direction to expose the key slot 20121. In another aspect, it will be understood that the lifting mechanism 20112 can further provide a supporting force to the key cap 20111 when the distance between the key cap 20111 and the bottom plate 2013 is the largest.

[0064] In this application, the specific structural form of the lifting mechanism 20112 is not limited. For example, the lifting mechanism 20112 may be of the scissor switch type shown in FIG. 11, or may be another possible structural form such as a butterfly type. The lifting mechanism 20112 may be accommodated in the key slot 20121 shown in FIG. 10. The lifting mechanism 20112 is provided with a second abutting structure 201121, and the second abutting structure 201121 may be provided with a second inclined surface 2011211. Further, each lifting mechanism 20112 may have a plurality of second abutting structures 201121. For example, as shown in FIG. 11, each lifting mechanism 20112 may be provided with two second abutting structures 201121. When each lifting mechanism 20112 has a plurality of second abutting structures 201121, the inclination directions of the second inclined surfaces 2011211 of the plurality of second abutting structures 201121 may be the same or different.

[0065] FIG. 12 shows the cooperation relationship between the crossbar 20153 and the key 2011 when the electronic device using the keyboard assembly 2 is in the deployed state according to an embodiment of the present application. In the embodiment shown in FIG. 12, the key cap 20111 is omitted to facilitate the explanation of the cooperation between the crossbar 20153 and the key 2011. Further, although the viewing angle of the keyboard assembly 2 in FIG. 12 is adjusted compared with the viewing angle in FIG. 7, the directions of the Y-axis and the X-axis are the same in FIGS. 12 and 17.

[0066] As shown in FIG. 12, in the present application, for the crossbar 20153 and the key 2011 arranged correspondingly, the first inclined surface 2015311 of the first contact structure 201531 in the key slot 20121 of the crossbar 20153 shown in FIG. 9 may be arranged to face the second inclined surface 2011211 of the second contact structure 201121 in the same key slot 20121 of the lifting mechanism 20112 shown in FIG. 11, and the second inclined surface 2011211 is located in the positive direction of the X axis with respect to the first inclined surface 2015311. Further, in the state shown in FIG. 12, the second inclined surface 2011211 arranged to face the first inclined surface 2015311 may be arranged at an interval from the first inclined surface 2015311, or the first inclined surface 2015311 and the second inclined surface 2011211 are in contact, but there is no pressing force between the first inclined surface 2015311 and the second inclined surface 2011211, or the pressing force between the first inclined surface 2015311 and the second inclined surface 2011211 is small. In this case, the lifting mechanism 20112 is in a raised state, and the entire key 2011 can protrude from the surface of the keyboard cover plate 2012 shown in FIG. 2, so that the input function of the keyboard assembly 2 is realized by pressing the key 2011.

[0067] From the description of the foregoing embodiments, when the electronic device rotates from the unfolded state shown in FIG. 12 to the closed state, the crossbar 20153 can move in the positive direction of the X-axis, and the second inclined surface 2011211 of the second abutting structure 201121 is located in the positive direction of the X-axis with respect to the first inclined surface 2015311 of the first abutting structure 201531. When the crossbar 20153 moves in the positive direction of the X-axis, the first inclined surface 2015311 exerts a pressing force on the second inclined surface 2011211. FIG. 13 shows the cooperation relationship between the crossbar 20153 and the key 2011 when the electronic device is in the closed state. From FIG. 13, when the electronic device is in the closed state, the lifting mechanism 20112 drives the key cap 20111 to move in the direction toward the key slot 20121 under the action of the pressing force exerted on the second inclined surface 2011211 by the first inclined surface 2015311. Thus, it can be seen that the key 2011 can descend into the corresponding key slot 20121. Therefore, when the electronic device is in the closed state, the height of the key 2011 protruding from the surface of the keyboard cover plate is small, so the thickness of the keyboard assembly 2 in the closed state of the electronic device is small, meeting the thin design requirements of the electronic device and improving the user experience.

[0068] Furthermore, when the electronic device rotates from the closed state to the unfolded state, the crossbar 20153 moves in the negative direction of the X-axis, and the pressing force exerted on the second inclined surface 2011211 by the first inclined surface 2015311 becomes smaller. In this case, the lifting mechanism 20112 can drive the key cap 20111 to rise from the corresponding key slot 20121, and the key cap 20111 can protrude from the surface of the keyboard cover plate 2012 shown in FIG. 2 to realize the function of the key 2011.

[0069] In the foregoing embodiments of the present application, the frame assembly 2015 includes two frames. In this case, the coordinated movement of the two frames drives the crossbar 20153 to move, improving the stability of the movement of the crossbar 20153. In some other possible embodiments of the present application, the frame assembly 2015 may include only one frame, for example, only the first frame. In this case, one frame moves together with the rotating shaft connecting piece 2014 to drive the crossbar 20153 to move. This simplifies the structure of the frame assembly 2015. It will be understood that in this embodiment, movement trajectories may be arranged for the first frame and the crossbar 20153 to ensure the stability of the movement of the first frame and the crossbar 20153. For example, a plurality of shoots may be arranged on the bottom plate 2013 shown in FIG. 1a, and each crossbar 20153 moves along the corresponding shoot.

[0070] Since the keyboard assembly 2 provided in this application is used, when the key 2011 is in use, the key 2011 can protrude from the surface of the keyboard cover plate 2012, so that the user can perform a tapping operation. In this state, the stroke of the key 2011 can be appropriately designed to meet the user's tapping requirements and improve the user experience. Further, in this application, the rotation shaft mechanism 3 drives the rotation shaft connecting piece 2014 to move in the direction towards the rotation shaft mechanism 3 or away from the rotation shaft mechanism 3, and drives the cross bar 20153 correspondingly arranged for each key 2011 column to move in the arrangement direction of each key 2011 column. The mutual pressing force of the contact structure between the cross bar 20153 and the key 2011 enables the key 2011 to move in the direction towards the corresponding key slot 20121, and reduces the height of each key 2011 protruding from the surface of the keyboard cover plate 2012. Further, the key 2011 can even be completely hidden in the corresponding key slot 20121. When the keyboard assembly 2 is used in an electronic device, the key 2011 moves in the direction towards the corresponding key slot 20121, reducing the space occupied by the key 2011 in the thickness direction of the entire electronic device. Therefore, the electronic device can be designed to be thinner in this state.

[0071] In this application, in order to drive the rotating shaft connecting piece 2014 to move in a direction approaching or away from the rotating shaft mechanism 3 when the rotating shaft mechanism 3 rotates, the rotating shaft connecting piece 2014 can be connected to the rotatable piece of the rotating shaft mechanism 3. Therefore, in the rotation process of the rotatable piece, the rotatable piece can drive the rotating shaft connecting piece 2014 to move. During specific implementation, the rotating shaft mechanism 3 may include a rotating assembly 301. FIG. 14 is a schematic diagram of the structure of the rotating assembly 301 according to one possible embodiment of this application. In this embodiment, the rotating assembly 301 may include a first fastening piece 3011 and a second fastening piece 3012. The first fastening piece 3011 and the second fastening piece 3012 may be fixedly connected to the keyboard body in the foregoing embodiment. The connection method is not limited thereto, and it may be a fixed connection by using a fastener such as a screw. Further, the first fastening piece 3011 and the second fastening piece 3012 may be used as support pieces for the entire rotating assembly 301. The first fastening piece 3011 and the second fastening piece 3012 are arranged at intervals, and other structures of the rotating assembly 301 may be directly or indirectly connected to the first fastening piece 3011 and the second fastening piece 3012.

[0072] Continuing to refer to FIG. 14. In this application, the rotating assembly 301 may further include a main shaft 3013. The main shaft 3013 may sequentially penetrate through the first fastening piece 3011 and the second fastening piece 3012. When the main shaft 3013 is rotatably connected to the first fastening piece 3011 and the second fastening piece 3012, the main shaft 3013 can rotate relative to the first fastening piece 3011 and the second fastening piece 3012.

[0073] Furthermore, refer to FIG. 15. FIG. 15 is a schematic view of the structure of the rotating assembly 301 shown in FIG. 14 from another angle. In this embodiment, at one end of the second fastening piece 3012 spaced apart from the first fastening piece 3011, a stopper portion 30131 may be further disposed on the main shaft 3013. The stopper portion 30131 can be used to achieve axial limitation of the main shaft 3013 and reduce axial slippage of the main shaft 3013, thereby improving the stability of the movement of the entire rotating assembly 301.

[0074] Continuing to refer to FIG. 15. In the present application, the rotating assembly 301 may further include a connecting rod 3014. A guide rail 30121 is disposed on the second fastening piece 3012. The connecting rod 3014 can be accommodated on the guide rail 30121 and can slide along the guide rail 30121. Continuing to refer to FIG. 15. In some embodiments of the present application, in order to prevent the connecting rod 3014 from falling off the guide rail 30121, the rotating assembly 301 may further include a limiting structure 30122. The limiting structure 30122 is fixedly connected to the second fastening piece 3012. The connecting rod 3014 is restricted within the guide rail 30121, thereby enhancing the reliability of the movement of the connecting rod 3014.

[0075] Furthermore, during the movement of the rotary assembly 301, a connecting portion 30141 can be provided on the side of the connecting rod 3014 facing the second fastening piece 3012, so that the connecting rod 3014 can slide within the guide rail 30121. Since other structures of the rotary assembly 301 can rotate as the main shaft 3013 rotates, in this application, the connecting rod 3014 can be connected to the main shaft 3013 via the connecting portion 30141. Refer to FIG. 16a for the specific implementation. FIG. 16a is a cross-sectional view taken along line B-B of FIG. 15. From the description of the foregoing embodiments, it can be seen that the stopper portion 30131 is disposed on the main shaft 3013 on the side of the second fastening piece 3012 away from the first fastening piece 3011. Refer to FIG. 16a. A track groove 301311 may be disposed on the end face of the stopper portion 30131 facing the connecting rod 3014, and the connecting portion 30141 of the connecting rod 3014 can be inserted into the track groove 301311. In this way, during the rotation of the main shaft 3013, the connecting portion 30141 of the connecting rod 3014 can slide along the track groove 301311.

[0076] It will be understood that the movement locus of the connecting rod 3014 can be designed by appropriately designing the track groove 301311. For example, when the rotary assembly 301 is in the state corresponding to FIG. 16a, the connecting rod 3014 can be hidden within the second fastening piece 3012. Further, referring to FIG. 16b. FIG. 16b shows the relative positional relationship between the connecting rod 3014 and the stopper portion 30131 when the rotary assembly 301 is in another operating state. When the rotary assembly 301 is in the state shown in FIG. 16b, the connecting rod 3014 can extend from the second fastening piece 3012. For example, in the keyboard assembly 2 shown in FIG. 3a, when the rotary assembly 301 is used and the electronic device using the keyboard assembly 2 changes from the unfolded state to the closed state, the main shaft 3013 rotates in the clockwise direction, and the connecting rod 3014 can slide in the direction toward the keyboard body 201. On the contrary, when the electronic device changes from the closed state to the unfolded state, the main shaft 3013 rotates in the counterclockwise direction, and the connecting rod 3014 can slide in the direction away from the keyboard body 201. In some other embodiments of the present application, when the rotary assembly 301 is used in the keyboard assembly and the electronic device using the keyboard assembly changes from the unfolded state to the closed state, the main shaft 3013 rotates in the clockwise direction, and the connecting rod 3014 can slide in the direction away from the keyboard body 201. On the contrary, when the electronic device changes from the closed state to the unfolded state, the main shaft 3013 rotates in the counterclockwise direction, and the connecting rod 3014 can slide in the direction toward the keyboard body 201.

[0077] Refer to FIG. 3a. In the present application, the rotary shaft mechanism 3 can be disposed at one end of the keyboard body, and the rotary shaft mechanism 3 can extend in the direction from the first frame 20151 to the second frame 20152. Further, the connecting rod 3014 can slide in a direction approaching the keyboard body 201 or away from the keyboard body 201 as the main shaft 3013 rotates. Therefore, in the present application, since the rotary shaft connecting piece 2014 of the keyboard body 201 can be fixedly connected to the connecting rod 3014, when the connecting rod 3014 slides, the rotary shaft connecting piece 2014 is driven to move in a direction approaching the rotary shaft mechanism 3 or away from the rotary shaft mechanism 3. In this way, the crossbar 20153 moves in the arrangement direction of each row of keys 2011, and the keys 2011 move in a direction toward the corresponding key slot 20121 or away from the key slot 20121.

[0078] It should be noted that in the present application, in order to improve the stability of the movement of the rotary shaft connecting piece 2014, a plurality of rotary assemblies 301 can be arranged in the rotary shaft mechanism 3. For example, in the embodiment shown in FIG. 3a, two rotary assemblies 301 can be arranged in the rotary shaft mechanism 3, and the two rotary assemblies 301 can be arranged at both ends in the extending direction of the rotary shaft mechanism 3. In this way, the connecting rods 3014 of the two rotary assemblies 301 can be fixedly connected to the rotary shaft connecting piece 2014, and the two connecting rods 3014 are appropriately arranged to move in the same direction synchronously, and can drive the rotary shaft connecting piece 2014 to move. In this way, the reliability of the movement of the rotary shaft connecting piece 2014 can be enhanced, and the stability of the movement of the entire keyboard assembly 2 can be improved.

[0079] In this application, in addition to the arrangement method provided in the foregoing embodiment, the rotary assembly 301 may be further arranged in the manner shown in FIG. 17. FIG. 17 is a schematic diagram of the structure of the rotary assembly 301 according to another embodiment of the present application. In this embodiment, the rotary assembly 301 also includes a first fastening piece 3011, a second fastening piece 3012, and a main shaft 3013. The main shaft 3013 penetrates through the first fastening piece 3011 and the second fastening piece 3012, and the main shaft 3013 can rotate relative to the first fastening piece 3011 and the second fastening piece 3012.

[0080] Furthermore, FIG. 18 is a schematic view of the structure of the rotating assembly 301 shown in FIG. 17 from another angle. The rotating assembly 301 is also provided with a connecting rod 3014, and the connecting rod 3014 can slide along the second fastening piece 3012. However, different from the foregoing embodiments, the main shaft 3013 in this embodiment drives the connecting rod 3014 to slide along the second fastening piece 3012 in a different manner. First, refer to FIG. 18. During specific implementation, the second fastening piece 3012 is provided with a guide rail 30121, and the connecting rod 3014 can be accommodated on the guide rail 30121 and slide along the guide rail 30121. Furthermore, in order to prevent the connecting rod 3014 from falling off the guide rail 30121, a first limiting portion 301211 may be disposed on the side wall of the guide rail 30121, and a second limiting portion 30142 may be disposed on the connecting rod 3014. The second limiting portion 30142 may be clamped by the first limiting portion 301211 and can slide within the first limiting portion 301211. The first limiting portion 301211 may be a chute, and the second limiting portion 30142 may be a protrusion, and the protrusion may be clamped by the chute. In some other embodiments of the present application, it will be understood that the first limiting portion 301211 may alternatively be a protrusion, and the second limiting portion 30142 may be a groove. In this way, the cooperation between the first limiting portion 301211 and the second limiting portion can provide a guiding function for sliding the connecting rod 3014 along the guide rail 30121, thereby enhancing the reliability of the movement of the connecting rod 3014.

[0081] Refer to FIG. 18. When the rotating assembly 301 moves, in order to realize the sliding of the connecting rod 3014 within the guide rail 30121, a pendulum rod structure 3015 may be further provided on the rotating assembly 301. The pendulum rod structure 3015 can be arranged on the side of the second fastening piece 3012 that is separated from the first fastening piece 3011. The pendulum rod structure 3015 may be sleeved on the main shaft 3013. Further, in the radial direction of the main shaft 3013, since the pendulum rod structure 3015 is fixedly connected to the main shaft 3013, the pendulum rod structure 3015 can rotate synchronously with the main shaft 3013.

[0082] FIG. 19a is a cross-sectional view of the rotating assembly 301 shown in FIG. 18 at C-C. The connecting rod 3014 has a connecting portion 30141, and an orbital groove 301411 may be provided in the connecting portion 30141. Further, the pendulum rod structure 3015 has a protruding portion 30151. The protruding portion 30151 can be inserted into the orbital groove 301411 and can contact the groove wall of the orbital groove 301411. In this way, when the main shaft 3013 rotates, the pendulum rod structure 3015 can be driven to rotate synchronously. Therefore, the protruding portion 30151 of the pendulum rod structure 3015 slides along the groove wall of the orbital groove 301411.

[0083] It will be understood that the movement locus of the connecting rod 3014 can be designed by appropriately designing the track groove 301411. For example, when the rotating assembly 301 is in the first operating state shown in FIG. 19a, the protrusion 30151 of the pendulum rod structure 3015 abuts against the groove wall of the track groove 301411 that is separated from the keyboard body, so that the connecting rod 3014 can be hidden in the second fastening piece 3012. Further, FIG. 19b shows the relative position of the protrusion 30151 of the connecting rod 3014 in the track groove 301411 when the rotating assembly 301 is in an intermediate state from the first operating state to the second operating state. From FIG. 19b, it can be seen that in the intermediate state, a recess 3014111 can be provided in the track groove 301411, and the protrusion 30151 can extend into the recess 3014111. When the rotating assembly 301 changes from the intermediate state shown in FIG. 19b to the second operating state, the protrusion 30151 presses against the side wall of the recess 3014111 and can push the connecting rod 3014 to slide in the direction towards the keyboard body. FIG. 19c shows the relative position of the protrusion 30151 of the connecting rod 3014 in the track groove 301411 when the rotating assembly 301 is in the deployed state. When the rotating assembly 301 is in the deployed state shown in FIG. 19c, the connecting rod 3014 can extend in the direction from the second fastening piece 3012 towards the keyboard body 201. For example, when the rotating assembly 301 is used in the keyboard assembly 2, when the electronic device using the keyboard assembly 2 changes from the closed state to the deployed state, the connecting rod 3014 can slide in the direction towards the keyboard body 201. On the contrary, when the electronic device changes from the deployed state to the closed state, the connecting rod 3014 can slide in the direction away from the keyboard body 201 within the guide rail 30121.

[0084] In this embodiment of the present application, since the rotation shaft connecting piece 2014 of the keyboard main body 201 can also be fixedly connected to the connecting rod 3014, when the connecting rod 3014 slides in the direction towards the keyboard main body 201 or away from the keyboard main body 201, the rotation shaft connecting piece 2014 is driven to move in the direction towards the rotation shaft mechanism 3 or away from the rotation shaft mechanism 3. In this way, the crossbar 20153 moves in the arrangement direction of each row of keys 2011, and the keys 2011 move in the direction towards the corresponding key slot 20121 or away from the key slot 20121.

[0085] In this application, the main shaft 3013 of the rotary shaft mechanism 3 rotates to drive the connecting rod 3014 to slide in the direction towards or away from the keyboard body 201. Since the rotary shaft connecting piece 2014 is fixedly connected to the connecting rod 3014, the sliding of the connecting rod 3014 drives the rotary shaft connecting piece 2014 to move in the direction towards or away from the rotary shaft mechanism 3, and the crossbar 20153 moves in the arrangement direction of each column of keys 2011. In this way, the abutting structure between the crossbar 20153 and the corresponding key 2011 can be used to realize the movement of the key 2011 in the direction towards the key slot 20121 or in the direction of exposing the key slot 20121. Therefore, when the key 2011 is in the used state, the key 2011 can protrude from the surface of the keyboard cover plate 2012 to facilitate the tapping operation by the user. Further, when the keyboard assembly 2 is not used for input operations, the key 2011 can move in the direction towards the corresponding key slot 20121 to reduce the height of each of the keys 2011 protruding from the surface of the keyboard cover plate 2012. Further, the key 2011 can even be completely hidden within the corresponding key slot 20121. When the keyboard assembly is used in an electronic device, the key 2011 moves in the direction towards the corresponding key slot 20121 to reduce the space occupied by the key 2011 in the thickness direction of the entire electronic device. Therefore, the electronic device can be designed to be thinner in this state.

[0086] It should be understood that the description of the rotating shaft mechanism 3 in the foregoing embodiments is merely an example of the description provided in one possible embodiment of the present application. In another possible embodiment of the present application, only one fastening piece may be arranged on the rotating shaft mechanism 3. In this case, the main shaft 3013 may be rotatably connected to the fastening piece. In some other possible embodiments of the present application, as long as the main shaft 3013 can rotate and the connecting rod 3014 is driven to move in a direction towards or away from the rotating shaft mechanism 3 during the rotation of the main shaft 3013, the main shaft 3013 of the rotating shaft mechanism 3 may alternatively be arranged independently of the first fastening piece 3011 and the second fastening piece 3012 in the foregoing embodiments.

[0087] Furthermore, as long as the rotating shaft connecting piece 2014 of the keyboard assembly 2 is driven to move in a direction towards or away from the rotating shaft mechanism when the rotating shaft mechanism 3 moves, the rotating shaft mechanism 3 may alternatively be arranged in any other possible manner. Other possible manners of the rotating shaft mechanism 3 are not described one by one in this specification, but it should be understood that other possible manners are included within the protection scope of the present application.

[0088] In the present application, in addition to the arrangement manner provided in the foregoing embodiments, as long as at least a part of the first frame of the keyboard body 201 is driven to move in the arrangement direction of the plurality of key columns, and each crossbar moves in the arrangement direction of each key column, it may be further arranged in another possible manner. In this way, the crossbar can be driven to move along the X axis by driving at least a part of the first frame to move along the Y axis. Therefore, the keys can move up and down.

[0089] For example, FIG. 20 is a schematic diagram of the structure of the keyboard body 201 according to another possible embodiment of the present application. In this embodiment, the keyboard body 201 may also include a frame assembly 2015 and keys (not shown in FIG. 20), and the keys may be arranged with reference to any of the foregoing embodiments. Details will not be described again here. However, the arrangement method of the frame assembly 2015 is slightly different from the arrangement method of the foregoing embodiments. Specifically, the frame assembly 2015 may include a first frame 20151 and a crossbar 20153. A first guide groove 201513 may be provided in the first frame 20151, a first pin head 201532 may be provided in the crossbar 20153, and the first pin head 201532 may be inserted into the first guide groove 201513. When the first frame 20151 moves in the arrangement direction of a plurality of key columns, the crossbar 20153 is driven to move in the arrangement direction of each key column, and the first pin head 201532 may slide along the first guide groove 201513.

[0090] When the first guide groove 201513 is specifically arranged, when the key moves in the direction towards the key slot, the supporting force of the lifting mechanism for the key cap changes. Based on this, the shape of the first guide groove 201513 may be obtained by adapting according to the force state of the key in the above-mentioned process. For example, FIG. 21 is an enlarged view of the partial structure at D in FIG. 20. In FIG. 21, the first guide groove 201513 is designed in an arc shape. Further, in this embodiment of the present application, when the key moves in the direction towards the key slot, the movement locus of the first pin head 201532 in the first guide groove 201513 can be divided into a continuous first locus portion 201514 and a second locus portion 201515. The included angle α1 between the first locus portion 201514 and the extension direction of the crossbar 20153 is smaller than the included angle α2 between the second locus portion 201515 and the extension direction of the crossbar 20153. In this way, when the first pin head 201532 moves along the first locus portion 201514 and the second locus portion 201515, the moving speed of the key cap in the first locus portion 201514 increases, and the moving speed of the key cap in the second locus portion 201515 is decelerated. Therefore, the driving force required by the key when the key moves along the two locus portions is close. Therefore, the force received by the key throughout the pressing process becomes more uniform.

[0091] Furthermore, since the driving force required by the key increases when the key moves along the first locus portion 201514 and the driving force required by the key decreases when the key moves along the second locus portion 201515, it will be understood that the driving force required by the key throughout the pressing process decreases. This is helpful for improving the user experience.

[0092] In this application, it should be noted that in addition to the arc-shaped design shown in FIG. 21, the first guide groove 201513 may be further designed in a fold shape, a parabolic shape, or another possible shape in some possible embodiments. This is not particularly limited in this application as long as the sliding trajectory of the first pin head 201532 in the first guide groove 201513 meets the above-mentioned requirements.

[0093] Continuing to refer to FIG. 20. In this embodiment of the present application, the keyboard body 201 may further include a second frame 20152. The first frame 20151 and the second frame 20152 are arranged opposite to each other, and a plurality of key columns are located between the first frame 20151 and the second frame 20152, and each key column is arranged in the direction from the first frame 20151 to the second frame 20152. Further, the second frame 20152 may be arranged based on the first frame 20151. Briefly speaking, the second frame 20152 may include a second guide groove 201523, and the cross bar 20153 may be further arranged together with a second pin head 201533. The second pin head 201533 is inserted into the second guide groove 201523. The first frame 20151 and the second frame 20152 can move synchronously in the same direction. When the first frame 20151 and the second frame 20152 move in the arrangement direction of the plurality of key columns, the cross bar 20153 is driven and can move in the arrangement direction of each key column. In this case, the second pin head 201533 can slide along the second guide groove 201523.

[0094] The second guide groove 201523 can also be designed in an arc shape, a fold shape, a parabolic shape, etc. Further, when the key moves in the direction towards the key slot, the movement trajectory of the second pin head 201533 in the second guide groove 201523 is divided into a continuous third trajectory portion and a fourth trajectory portion. The included angle α3 between the third trajectory portion and the extension direction of the cross bar 20153 is smaller than the included angle α4 between the fourth trajectory portion and the extension direction of the cross bar 20153.

[0095] In this application, since the synchronous movement of the first frame 20151 and the second frame 20152 drives the crossbar 20153 to move, the stability of the movement of the crossbar 20153 can be effectively improved. This helps to improve the consistency of the movement of the entire key column arranged corresponding to the crossbar 20153, and improves the user experience.

[0096] In the embodiment shown in FIG. 20, the rotary shaft mechanism of the keyboard assembly is also used as a drive mechanism to drive the first frame 20151 and the second frame 20152 to move in the arrangement direction of a plurality of key columns. Specifically, refer to FIG. 22. FIG. 22 shows the connection relationship between the rotary shaft mechanism 3 and the first frame 20151 and the second frame 20152. The keyboard body 201 may further include a rotary shaft connecting piece 2014, and the rotary shaft connecting piece 2014 is connected to the rotary shaft mechanism 3. The movement of the rotary shaft mechanism 3 can drive the rotary shaft connecting piece 2014 to move in a direction approaching the rotary shaft mechanism 3 or away from the rotary shaft mechanism 3, that is, in the arrangement direction of a plurality of key columns. Further, the first frame 20151 and the second frame 20152 are fixedly connected to the rotary shaft connecting piece 2014. In this way, the first frame 20151 and the second frame 20152 move in a direction towards the rotary shaft mechanism 3 or away from the rotary shaft mechanism 3 together with the rotary shaft connecting piece 2014, and can drive the crossbar 20153 to move in the arrangement direction of each key column.

[0097] It should be noted that the rotary shaft mechanism 3 of the embodiment shown in FIG. 22 can be arranged based on the rotary shaft mechanism 3 provided in any of the foregoing embodiments. Details are not described again here.

[0098] Figure 23 is a schematic diagram of the structure of the keyboard main body 201 according to another possible embodiment of the present application. In this embodiment, the second frame 20152 is not provided in the frame assembly 2015 of the keyboard main body 201, and the crossbar 20153 can be driven to move in the arrangement direction of each key column only by the movement of the first frame 20151 in the arrangement direction of a plurality of key columns. Further, the first frame 20151 in the embodiment shown in FIG. 23 can be arranged with reference to the first frame 20151 in the embodiment shown in FIG. 20. Details will not be described again here.

[0099] In addition to using the rotary shaft mechanism 3 as a drive mechanism for moving the frame assembly 2015 in the present application, another possible drive mechanism can be used to drive and move the frame assembly 2015. Refer to FIG. 23. For example, in this embodiment, the drive mechanism may be an electric drive mechanism 6. The electric drive mechanism 6 may be arranged on the keyboard main body 201. The electric drive mechanism 6 is connected to the first frame 20151 and can drive the first frame 20151 to move in the arrangement direction of a plurality of key columns. In the present application, the type of the electric drive mechanism 6 is not limited. For example, the electric drive mechanism 6 may be a motor, an electromagnet, or the like. Alternatively, the electric drive mechanism 6 may be connected to the first frame 20151 via a shape memory alloy wire, and the first frame 20151 may be driven to move by heating and contracting the shape memory alloy wire.

[0100] It will be understood that arranging the drive mechanism as the electric drive mechanism 6 can prevent the movement of the frame assembly 2015 from being affected by the arrangement of the rotary shaft mechanism 3, thereby helping to simplify the structure of the keyboard assembly. Further, when the electric drive mechanism 6 is used as the drive mechanism for moving the frame assembly 2015, the control program of the electric drive mechanism 6 can be adjusted to control the movement parameters (displacement, direction, speed, etc.) of the frame assembly 2015. This also helps to enhance the technical meaning of the design of the keyboard assembly and further improve the user experience.

[0101] It should be noted that when the frame assembly 2015 includes both the first frame 20151 and the second frame 20152, both the first frame 20151 and the second frame 20152 can be driven to move under the action of the electric drive mechanism 6. The first frame 20151 and the second frame 20152 may share the electric drive mechanism 6. This can improve the consistency of the movement of the first frame 20151 and the second frame 20152. Alternatively, the electric drive mechanism 6 may be separately arranged for the first frame 20151 and the second frame 20152, and the control programs of the two electric drive mechanisms 6 are adjusted to achieve synchronous movement of the first frame 20151 and the second frame 20152.

[0102] Based on this, in the present application, when the frame assembly 2015 uses the structure shown in FIG. 6, the electric drive mechanism 6 can also be used to drive the first frame 20151 and the second frame 20152 to move. When the frame assembly 2015 is arranged, the connection between the first frame 20151 and the second frame 20152 and the rotary shaft mechanism 3 may be replaced by the connection between the first frame 20151 and the second frame 20152 and the electric drive mechanism 6. This will not be described in detail here.

[0103] It is obvious that those skilled in the art can make various modifications and deformations to the present application without departing from the spirit and scope of the present application. The present application is intended to include these modifications and deformations as long as these modifications and deformations are within the protection scope defined by the appended claims and equivalent technologies.

Description of Reference Numerals

[0104] 1 Display screen 2 Keyboard assembly 201 Keyboard body 2011 Key 20111 Key cap 20112 Lifting mechanism 201121 Second abutting structure 2011211 Second inclined surface 2012 Keyboard cover plate 20121 Key slot 2013 Bottom plate 2014 Rotating shaft connecting piece 2015 Frame assembly 20151 First frame 201511 First inner frame 201512 First outer frame 201513 First guide groove 201514 First locus part 201515 Second locus part 20152 Second frame 201521 Second inner frame 201522 Second outer frame 201523 Second guide groove 20153 Cross bar 201531 First abutting structure 2015311 First inclined surface 201532 First pin head 201533 Second pin head 2016 First connecting rod assembly 20161 First connecting rod 201611 First end 201612 Second end 20162 Second connecting rod 201621 First end 201622 Second end 2017 Second connecting rod assembly 3 Rotating shaft mechanism 301 Rotating assembly 3011 First fastening piece 3012 Second fastening piece 30121 Guide rail 301211 First limiting part 30122 Limiting structure 3013 Main Shaft 30131 Stopper Part 301311 Raceway Groove 3014 Connecting Rod 30141 Connecting Part 301411 Raceway Groove 3014111 Recess 30142 Second Restriction Part 3015 Pendulum Rod Structure 30151 Protrusion 4 Support Part 401 First Support Plate 402 Second Support Plate 403 Third Support Plate 5 Host 6 Electric Drive Mechanism

Claims

1. A keyboard assembly, wherein the keyboard assembly includes a keyboard body and a drive mechanism, the keyboard body includes keys and a frame assembly, the keys are arranged in parallel in a plurality of columns, each key column includes a plurality of keys, and the keys are accommodated in key slots on the keyboard body, the frame assembly includes a first frame and a plurality of crossbars, one crossbar is correspondingly arranged for each key column, the drive mechanism drives at least a part of the first frame to move in the arrangement direction of the plurality of key columns, and each crossbar moves in the arrangement direction of each key column along with the movement of at least the part of the first frame in the arrangement direction of the plurality of key columns, and each key column moves in the direction towards the key slot or in the direction of exposing the key slot along with the movement of each crossbar, the first frame includes a first inner frame and a first outer frame, the first outer frame is connected to the drive mechanism, the first inner frame is located on the side of the first outer frame facing the keys, 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, 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 fixed mechanical component on the keyboard body, the first outer frame moves in the arrangement direction of the plurality of key columns together with the drive mechanism, drives the first inner frame to move in the direction approaching the first outer frame or away from the first outer frame, one end of each crossbar is fixedly connected to the first inner frame, and each crossbar moves in the arrangement direction of each key column along with the movement of the first inner frame, a keyboard assembly.

2. The keyboard assembly further includes a second frame, the first frame and the second frame are arranged opposite to each other, the drive mechanism drives the second frame to move in the arrangement direction of the plurality of key columns, and the plurality of key columns are located between the first frame and the second frame, and each key column is arranged in the direction from the first frame to the second frame. The keyboard assembly according to claim 1.

3. The second frame includes a second inner frame and a second outer frame. The second outer frame is connected to the drive mechanism. The second inner frame is located on the side of the second outer frame facing the keys. 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 fixed mechanical component on the keyboard body. One end of the crossbar is fixedly connected to the first inner frame, and the other end of the crossbar is fixedly connected to the second inner frame. The first outer frame and the second outer frame move in the arrangement direction of the plurality of key columns together with the drive mechanism, and drive the first inner frame and the second inner frame to move in the same direction as the arrangement direction of each key column. The keyboard assembly according to claim 2.

4. A first guide groove is provided in the first frame, a first pin head is provided on the crossbar, the first pin head is inserted into the first guide groove, and when the first frame moves in the arrangement direction of the plurality of key columns, the first pin head slides along the first guide groove to drive the crossbar to move in the arrangement direction of each key column. The keyboard assembly according to claim 1.

5. In the process of the key moving in the direction towards the key slot, the movement locus of the first pin head along the first guide groove is divided into a continuous first locus part and a second locus part, and the included angle between the first locus part and the extension direction of the crossbar is smaller than the included angle between the second locus part and the extension direction of the crossbar. The keyboard assembly according to claim 4.

6. The keyboard assembly further includes a second frame, the first frame and the second frame are arranged opposite to each other, the driving mechanism drives the second frame to move in the arrangement direction of the plurality of key columns, and the plurality of key columns are located between the first frame and the second frame, and each key column is arranged in the direction from the first frame to the second frame. The keyboard assembly according to claim 4.

7. A second guide groove is provided in the second frame, a second pin head is provided on the crossbar, the second pin head is inserted into the second guide groove, and when the second frame moves in the arrangement direction of the plurality of key columns, the second pin head slides along the second guide groove to drive the crossbar to move in the arrangement direction of each key column. The keyboard assembly according to claim 6.

8. In the process of the key moving in the direction towards the key slot, the movement locus of the second pin head along the second guide groove is divided into a continuous third locus part and a fourth locus part, and the included angle between the third locus part and the extension direction of the crossbar is smaller than the included angle between the fourth locus part and the extension direction of the crossbar. The keyboard assembly according to claim 7.

9. The keyboard assembly includes a rotating shaft mechanism, the rotating shaft mechanism is used as the driving mechanism, the keyboard body further includes a rotating shaft connecting piece, the rotating shaft connecting piece is connected to the rotating shaft mechanism, and the rotating shaft mechanism drives the rotating shaft connecting piece to move in the direction towards the rotating shaft mechanism or away from the rotating shaft mechanism. The first frame, together with the rotary shaft connecting piece, moves in the direction towards the rotary shaft mechanism or the direction away from the rotary shaft mechanism, and drives the crossbar to move in the arrangement direction of each key row. The keyboard assembly according to claim 1.

10. The rotary shaft mechanism includes a rotary assembly. The rotary assembly includes a main shaft and a connecting rod. The connecting rod slides in the direction approaching the keyboard body or the direction away from the keyboard body as the main shaft rotates. The rotary shaft connecting piece is fixedly connected to the connecting rod. The keyboard assembly according to claim 9.

11. The rotary assembly further includes a fastening piece. The main shaft is rotatably connected to the fastening piece. The connecting rod is slidably connected to the fastening piece. The main shaft is further provided with a stopper portion. A track groove is arranged on the end face of the stopper portion facing the connecting rod. The connecting rod has a connecting portion. The connecting portion is inserted into the track groove. The main shaft rotates to drive the connecting portion to slide in the track groove, and pushes the connecting rod to slide in the direction approaching the keyboard body or the direction away from the keyboard body. The keyboard assembly according to claim 10.

12. The rotary assembly further includes a pendulum rod structure. The pendulum rod structure is sleeved on the main shaft. The pendulum rod structure is fixedly connected to the main shaft in the radial direction of the main shaft. A protruding portion is provided on the pendulum rod structure. The connecting rod has a connecting portion. A track groove is provided in the connecting portion. A concave portion is provided in the track groove. The pendulum rod structure rotates together with the main shaft, drives the protruding portion to slide along the track groove, and when the protruding portion extends into the concave portion, pushes the connecting rod to slide in the track groove in the direction approaching the keyboard body or the direction away from the keyboard body. The keyboard assembly according to claim 10.

13. The driving mechanism is an electric driving mechanism. The driving mechanism is arranged on the keyboard body. The keyboard assembly according to claim 1.

14. For the correspondingly arranged key columns and crossbars, each key includes a key cap and a lifting mechanism, the lifting mechanism is located within the key slot, and the key cap covers the lifting mechanism. The crossbar is provided with a first abutting structure, the lifting mechanism is provided with a second abutting structure, and the crossbar moves so as to drive the first abutting structure to press the second abutting structure. Therefore, the lifting mechanism drives the key cap to move in the direction towards the key slot. The keyboard assembly according to claim 1.

15. The keyboard body is provided with a plurality of key slots, the crossbar is provided with a plurality of first abutting structures, and at least one first abutting structure is accommodated in each of the key slots. The keyboard assembly according to claim 14.

16. The first abutting structure has a first inclined surface, the second abutting structure has a second inclined surface, and the first inclined surface is arranged opposite to the second inclined surface. The keyboard assembly according to claim 14.

17. The keyboard body further includes a bottom plate and a keyboard cover plate, the keyboard cover plate covers the bottom plate, a receiving space is formed between the bottom plate and the keyboard cover plate, and the key slots are arranged on the keyboard cover plate. The keyboard assembly according to claim 1.

18. The keyboard body further includes a bottom plate, the bottom plate is provided with a plurality of chutes, and each crossbar moves along the corresponding chute. The keyboard assembly according to claim 1.

19. An electronic device including a display screen and the keyboard assembly according to any one of claims 1 to 18, wherein the display screen is rotatably connected to the keyboard body via a rotating shaft mechanism.

20. An electronic device including a host and the keyboard assembly according to any one of claims 1 to 18, wherein the host is rotatably connected to the keyboard body via a rotating shaft mechanism.

21. The electronic device further includes a first support plate, the host is detachably connected to the first support plate, and the first support plate is rotatably connected to the keyboard body via the rotary shaft mechanism. The electronic device according to claim 20.

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