Patent Description:
With the continuous development of electronic products, the electronic product is now favored by users due to its portability and a variety of operability. However, at the same time, the users' expectations and requirements for the electronic products are also getting higher and higher. For example, in flexible electronic devices, a shaft assembly is one of important structural components to control rotation of the electronic device. However, a current shaft assembly is relatively complex in structure, which increases total gaps, thus displacements after falling are enlarged, and a quality of the shaft assembly is declined.

<CIT> relates to a foldable electronic apparatus and a method for controlling the foldable electronic apparatus. The foldable electronic apparatus includes a casing assembly and a flexible display assembly disposed at the casing assembly. The casing assembly includes a first body and a second body. The first body is rotatable relative to the second body to switch the foldable electronic apparatus between a folded state and an unfolded state. The foldable electronic apparatus further defines a first acoustic opening in a second surface of the first body opposite a first surface of the first body, and a second acoustic opening in a side of the foldable electronic apparatus where an inner folding surface thereof is located. The foldable electronic apparatus emits sounds through the first acoustic opening or the second acoustic opening according to the states of the foldable electronic apparatus.

<CIT> relates to a folding device including a rotational connection assembly and a first carrying assembly. The rotating connection assembly includes a bearing part and a first rotating shaft. The bearing part is provided with a first rotating shaft hole and a first slit extending from an inner side wall of the first rotating shaft hole to an outer side wall of the bearing part. The first rotating shaft is at least partially interference-fitted with the first rotating shaft hole, so that an inner peripheral side wall of the first rotating shaft hole can exert a rotational damping force on an outer peripheral side wall of the first rotating shaft. The first carrying assembly is fixed to the first rotating shaft. The first carrying assembly is configured to rotate relative to the bearing part through the first rotating shaft.

In order to describe technical solutions in implementations of the disclosure more clearly, the following will give a brief introduction to the accompanying drawings used for describing the implementations.

Reference signs:
electronic assembly - <NUM>, shaft assembly - <NUM>, housing - <NUM>, electronic device - <NUM>, flexible screen - <NUM>, first shaft case - <NUM>, first sidewall - <NUM>, second sidewall - <NUM>, first positioning portion - <NUM>, second positioning portion - <NUM>, third rotating portion - <NUM>, fourth rotating portion - <NUM>, baffle plate - <NUM>, third receiving space - <NUM>, first rotating member - <NUM>, first rotating member (A) - <NUM>, first rotating member (B) - <NUM>, hobbed teeth - <NUM>, rotating unit - <NUM>, second rotating member - <NUM>, movable plate - <NUM>, first sliding portion - <NUM>, second sliding portion - <NUM>, first rotating portion - <NUM>, second rotating portion - <NUM>, rotating hole - <NUM>, rotating member - <NUM>, second shaft case - <NUM>, synchronization mechanism - <NUM>, first gear - <NUM>, second gear - <NUM>, first bracket - <NUM>, first receiving space - <NUM>, first internal gear - <NUM>, first accommodating space - <NUM>, second bracket - <NUM>, second receiving space - <NUM>, second internal gear - <NUM>, second accommodating space - <NUM>, first spur gear - <NUM>, first sub-spur gear - <NUM>, second sub-spur gear - <NUM>, second spur gear - <NUM>, third sub-spur gear - <NUM>, fourth sub-spur gear - <NUM>, damping mechanism - <NUM>, first limiting portion - <NUM>, first flat surface - <NUM>, first protruding portion - <NUM>, first inclined surface - <NUM>, third flat surface - <NUM>, second limiting portion - <NUM>, third limiting portion - <NUM>, second flat surface - <NUM>, second protruding portion - <NUM>, second inclined surface - <NUM>, fourth flat surface - <NUM>, elastic.

The below description are preferred implementations of the disclosure, and it is noted that various improvements and modifications can be made without departing from the principle of the application to those of ordinary skill in the art.

An electronic assembly is provided in the disclosure. The electronic assembly includes a shaft assembly and housings arranged oppositely. The shaft assembly includes a first shaft case, first rotating members, and rotating units. The housings are at least partially disposed at two opposite sides of the first shaft case. The first rotating members are at least partially disposed at the two opposite sides of the first shaft case. Each of the first rotating members has one end rotatably connected with the first shaft case and the other end connected with the housings. The rotating units are at least partially disposed at the two opposite sides of the first shaft case. Each of the rotating units includes a second rotating member and a movable plate. The second rotating member has one end rotatably connected with the first shaft case and the other end connected with the movable plate. The movable plate has one end connected to the housings.

In an implementation, the first shaft case has first sidewalls arranged oppositely and second sidewalls arranged oppositely. Each of the second sidewalls is connected with the first sidewalls arranged oppositely. The first rotating member is rotatably connected to the first sidewall. The second rotating member is rotatably connected to the second sidewall.

In an implementation, an orthographic projection of a rotation center of the second rotating member on the first sidewall is spaced apart from a rotation center of the first rotating member.

In an implementation, which is an embodiment of the invention, the movable plate has a first sliding portion. The second rotating member has a second sliding portion. The first sliding portion and the second sliding portion cooperate with each other to allow the movable plate to slide relative to the second rotating member.

According to the invention, the movable plate has a first rotating portion at one end thereof. The housing has a second rotating portion. The first rotating portion and the second rotating portion cooperate with each other to allow the movable plate to be rotatably connected with the housing at one end of the movable plate.

In an implementation, the first rotating portion defines a rotating hole. The second rotating portion has a rotating member. The first rotating portion is sleeved with the rotating member through the rotating hole to allow the movable plate to be rotatably connected with the housing at one end of the movable plate.

In an implementation, the electronic assembly further includes second shaft cases connected with the first sidewalls. The first rotating member is disposed between the first sidewall and the second shaft case.

In an implementation, the first sidewall has a first positioning portion. The second shaft case further has a second positioning portion. The first positioning portion and the second positioning portion cooperate with each other to allow the second shaft case to be connected with the first sidewall. The first rotating member is sleeved on the first positioning portion or the second positioning portion.

In an implementation, the second sidewall has a third rotating portion. The second rotating member has a fourth rotating portion. The third rotating portion and the fourth rotating portion cooperate with each other to allow the second rotating member to be rotatably connected with the second sidewall.

In an implementation, the electronic assembly further includes a synchronization mechanism. The first rotating members are at least partially disposed at the two opposite sides of the first shaft case are a first rotating member (A) and a first rotating member (B). The synchronization mechanism is connected with the first rotating member (A) and the first rotating member (B) to allow the first rotating member (A) and the first rotating member (B) to synchronously rotate.

In an implementation, the synchronization mechanism includes a first gear and a second gear, the first rotating member (A) is rotatably connected with the first gear. The first gear is rotatably connected with the second gear. The second gear is rotatably connected with the first rotating member (B).

In an implementation, the first rotating member has multiple hobbed teeth on a peripheral side surface of the first rotating member. The multiple hobbed teeth are arranged around at least one quarter of the peripheral side surface of the first rotating member.

In an implementation, the synchronization mechanism includes a first bracket and a second bracket connected with the first bracket, a first internal gear and a second internal gear, and a first spur gear and a second spur gear. The first bracket and the second bracket are received in the first shaft case. The first bracket defines a first receiving space therein. The second bracket defines a second receiving space therein. The first internal gear is received in the first receiving space and rotatable relative to the first bracket. The second internal gear is received in the second receiving space and rotatable relative to the second bracket. The first rotating member (A) is connected with the first internal gear. The first rotating member (B) is connected with the second internal gear. The first internal gear defines a first accommodating space therein. The second internal gear defines a second accommodating space therein. The first spur gear has a first sub-spur gear received in the first accommodating space and a second sub-spur gear disposed outside the first accommodating space. The first sub-spur gear is rotatably connected with the first internal gear. The second spur gear has a third sub-spur gear received in the second accommodating space and a fourth sub-spur gear disposed outside the second accommodating space. The third sub-spur gear is rotatably connected with the second internal gear. The fourth sub-spur gear is rotatably connected with the second sub-spur gear. When the first rotating member (A) rotates, the first internal gear, the second internal gear, the first spur gear, and the second spur gear cooperate to allow the first rotating member (A) and the first rotating member (B) to synchronously rotate.

In an implementation, the second sub-spur gear has a diameter larger than the first sub-spur gear, the fourth sub-spur gear has a diameter larger than the third sub-spur gear.

In an implementation, the first shaft case further has a baffle plate. The baffle plate, the first sidewall, and the second sidewalls arranged oppositely define a third receiving space. The electronic assembly further includes a damping mechanism at least partially received in the third receiving space. The damping mechanism includes an elastic member, a first limiting portion, and a second limiting portion. The first limiting portion has one end extended through the first sidewall and connected with the first gear and the other end abutted against one end of the elastic member. The second limiting portion has one end extended through the first sidewall and connect with the second gear and the other end abutted against the end of the elastic member. The elastic member has the other end connected with the baffle plate and the elastic member is in a compressed state.

In an implementation, the damping mechanism further includes a third limiting portion. The third limiting portion has one end connected with the elastic member and the other end abutted against the first limiting portion and the second limiting portion.

In an implementation, a side surface of the first limiting portion close to the third limiting portion is a first flat surface. A side surface of the third limiting portion close to the first limiting portion is a second flat surface. The first limiting portion has a first protruding portion protruded from part of the first flat surface. The first protruding portion has a first inclined surface connected with the first flat surface. The third limiting portion has a second protruding portion protruded from part of the second flat surface. The second protruding portion has a second inclined surface connected with the second flat surface. When the electronic assembly is in unfolded state, the first flat surface abuts against the second flat surface, and the first inclined surface abuts against the second inclined surface. When the electronic assembly rotates, the first limiting portion abuts against the second inclined surface.

In an implementation, the first protruding portion further has a third flat surface connected with the first inclined surface. The third flat surface is parallel to the first flat surface. The second protruding portion further has a fourth flat surface connected with the second inclined surface. The fourth flat surface is parallel to the second flat surface. When the electronic assembly is folded to a predetermined angle, the second flat surface abuts against the fourth flat surface.

An electronic device is further provided in the implementations of the disclosure. The electronic device includes a flexible screen and the electronic assembly provided in the foregoing implementations of the disclosure. The flexible screen is mounted on the movable plate of the electronic assembly.

In an implementation, the first shaft case defines an avoidance groove on one side of the first shaft case close to the flexible screen. The avoidance groove is configured to receive part of the flexible screen when the electronic device is bent.

Before describing technical solutions of the disclosure, technical problems in the related art are introduced below in detail.

In flexible electronic devices, the shaft assembly is one of important structural components to control rotation of the flexible electronic device. There are many kinds of shaft assemblies, usually named by the number of plates which are in the shaft assembly and for supporting a flexible screen, such as a two-plate shaft assembly, a four-plate shaft assembly, and a five-plate shaft assembly. In a case that the shaft assembly has a larger number of plates (for example, five plates), a gap will exist between two adjacent plates, and thus the five-plate shaft assembly will have one more gap and one more step (also known as a mismatch gap) than the four-plate shaft assembly, which will adversely affect surface effect of the flexible screen. This happens because, firstly, there will be no rigid support for the flexible screen at a position opposite to the gap, and secondly, the gap will also affect flushness between two adjacent panels, which results in a height difference of the flexible screen at different positions, and eventually adversely affects the surface effect of the flexible screen. The four-plate shaft assembly in the related art has a complex structure and a larger number of components, and there is an assembly tolerance between each two components, which may increase total gaps, increase the size of a dimensional chain, enlarge displacements after falling, and decline a quality of the shaft assembly.

In view of above, an electronic assembly is provided in the disclosure, and a first rotating member and a second rotating member cooperate with each other to allow the electronic assembly to rotate, which simplifies a shaft assembly in structure and improves a quality of the shaft assembly.

Referring to <FIG>, <FIG> is a partial top view of an electronic assembly in an implementation of the disclosure, <FIG> is a partial exploded view of an electronic assembly in an implementation of the disclosure, <FIG> is a schematic cross-sectional view of <FIG> along direction A-A, and <FIG> is a schematic cross-sectional view of <FIG> along direction B-B. An electronic assembly <NUM> is provided in the disclosure. The electronic assembly <NUM> includes a shaft assembly <NUM> and housings <NUM> arranged oppositely. The shaft assembly <NUM> includes a first shaft case <NUM>, first rotating members <NUM>, and rotating units <NUM>. The housings <NUM> are at least partially disposed at two opposite sides of the first shaft case <NUM>. The first rotating members <NUM> are at least partially disposed at the two opposite sides of the first shaft case <NUM>. Each of the first rotating members <NUM> has one end rotatably connected with the first shaft case <NUM> and the other end connected with the housings <NUM>. The rotating units <NUM> are at least partially disposed at the two opposite sides of the first shaft case <NUM>. Each of the rotating units <NUM> includes a second rotating member <NUM> and a movable plate <NUM>. The second rotating member <NUM> has one end rotatably connected with the first shaft case <NUM> and the other end connected with the movable plate <NUM>. The movable plate <NUM> has one end connected to the housings <NUM>.

The electronic assembly <NUM> provided in the disclosure mainly includes the shaft assembly <NUM> and the housings <NUM> arranged oppositely. That is, the electronic assembly <NUM> is a collective name of the shaft assembly <NUM> and the housings <NUM>. In an implementation, the shaft assembly <NUM> includes the first shaft case <NUM>. Firstly, the first shaft case <NUM> can serve as a carrier for other rotating components of the shaft assembly <NUM>, that is, the rotating components are arranged on the first shaft case <NUM> and can rotate around some points on the first shaft case <NUM>. Secondly, the first shaft case <NUM> can also be used to receive some other components in the shaft assembly <NUM>, that is, some components are mounted in the first shaft case <NUM>, which saves space. Furthermore, the first shaft case <NUM> can also serve as a protective case for the electronic assembly <NUM> and an electronic device <NUM>, that is, the first shaft case <NUM> serves as part of a housing of the electronic device <NUM>, thereby protecting components within the electronic device <NUM>. <FIG> only illustrates the first shaft case <NUM> and structures at one side of the first shaft case <NUM>, structures at the other side of the first shaft case <NUM> are the same as and arranged symmetrically with the structures at the one side of the first shaft case <NUM>.

Additionally, the housings <NUM> of the disclosure are at least partially disposed at the two opposite sides of the first shaft case <NUM>. The housings <NUM> and the first shaft case <NUM> provided in the disclosure can corporately serve as the housing of the electronic device <NUM>. In this implementation, as illustrated in <FIG>, part of the housings <NUM> are disposed at the two opposite sides of the first shaft case <NUM>, and the rest of the housings <NUM> are disposed at a third side of the first shaft case <NUM> connected with the two opposite sides, which allows the first shaft case <NUM> to be accommodated in a space surrounded by the housing <NUM>, and the first shaft case <NUM> is protected by the housing <NUM> to a certain extent.

As illustrated in <FIG>, the shaft assembly <NUM> provided in the disclosure further includes the first rotating members <NUM> at least partially disposed at the two opposite sides of the first shaft case <NUM>. The first rotating member <NUM> can be regarded as a rotatable member. In an implementation, the first rotating member <NUM> is rotatably connected to a case of the shaft assembly <NUM>, that is, the first rotating member <NUM> can rotate around a certain point on the first shaft case <NUM>. The first rotating member <NUM> is fixedly connected with the housing <NUM> at the other end of the first rotating member <NUM>. As such, when the first rotating member <NUM> rotates relative to the first shaft case <NUM>, the first rotating member <NUM> can drive the housing <NUM> to rotate together. In this implementation, as an example, part of the first rotating members <NUM> is disposed at two opposite sides of the first shaft case <NUM>, and the rest of the first rotating members <NUM> is disposed at the other sides of the first shaft case <NUM> for connecting the first shaft case <NUM>. In an implementation, the first rotating member <NUM> can be rotatably connected to the first shaft case <NUM> directly. Alternatively, the first rotating member <NUM> can also be connected to the first shaft case <NUM> indirectly, so as to make the first rotating member <NUM> rotatable relative to the first shaft case <NUM>. In an implementation, the other end of the first rotating member <NUM> can be fixedly connected to the housing <NUM>. Alternatively, the other end of the first rotating member <NUM> can be movably connected to the housing <NUM> (as illustrated in <FIG>).

As illustrated in <FIG>, the shaft assembly <NUM> provided in the disclosure further includes the rotating units <NUM> at least partially disposed at the two opposite sides of the first shaft case <NUM>. Each of the rotating units <NUM> includes the second rotating member <NUM> and the movable plate <NUM>. The second rotating member <NUM> is also a rotatable member. The second rotating member <NUM> is rotatably connected with the first shaft case <NUM> at one end of the second rotating member <NUM>. That is, the second rotating member <NUM> can rotate around a certain point on the first shaft case <NUM>. The second rotating member <NUM> is connected with the movable plate <NUM> at the other end of the second rotating member <NUM>. In the electronic device <NUM>, the flexible screen <NUM> needs to be disposed on the housings <NUM>, meanwhile, the flexible screen <NUM> needs to be supported at a bottom surface thereof by a rigid structure. Thus, in the disclosure, the flexible screen <NUM> can be supported by the movable plate <NUM>.

In addition, the movable plate <NUM> is connected with the housing <NUM> at one end of the movable plate <NUM> and is connected with the second rotating member <NUM> at the other end of the movable plate <NUM>. In an implementation, when the housing <NUM> is subjected to a rotary force, the first rotating member <NUM> can rotate relative to the first shaft case <NUM> to drive the housing <NUM> to rotate. Rotation of the housings <NUM> can also make the movable plates <NUM> rotate, and the movable plates <NUM> can also rotate together under the action of the second rotating members <NUM> and eventually drive the flexible screen <NUM> disposed on the movable plate <NUM> to rotate, which can realize bending of the flexible screen <NUM>. In an implementation, the second rotating member <NUM> may be directly connected with the first shaft case <NUM> at one end of the second rotating member <NUM>, or the second rotating member <NUM> may be indirectly connected with the second shaft case <NUM> at the end of the second rotating member <NUM>. In an implementation, the second rotating member <NUM> can be fixedly connected with the movable plate <NUM> at the other end of the second rotating member <NUM>, or the second rotating member <NUM> can be slidably connected with the movable plate <NUM> at the other end of the second rotating member <NUM>. In an implementation, the movable plate <NUM> can be fixedly connected with the housing <NUM> at one end of the movable plate <NUM>, or the movable plate <NUM> can be rotatably connected with the housing <NUM> at the end of the movable plate <NUM>. In an implementation, since the shaft assembly <NUM> includes two movable plates <NUM>, the shaft assembly <NUM> of the disclosure can be regarded as a two-plate shaft assembly <NUM>. Alternatively, when taking the housings <NUM> arranged oppositely into account, the shaft assembly <NUM> of the disclosure can also be regarded as a four-plate shaft assembly <NUM>.

To sum up, the electronic assembly <NUM> provided in the disclosure has a simple structure, in which the first rotating members <NUM> is cooperated with the second rotating members <NUM>, the first rotating member <NUM> is connected with the first shaft case <NUM> and the housing <NUM>, the second rotating member <NUM> is connected with the first shaft case <NUM> and the movable plate <NUM>, and the movable plate <NUM> is connected with the housing <NUM>, which realizes bending of the electronic assembly <NUM>, reduces an accumulated amount of the displacements after falling, and improves the quality of the shaft assembly <NUM>.

In an implementation, referring to <FIG>, in this implementation, the first shaft case <NUM> has first sidewalls <NUM> arranged oppositely and second sidewalls <NUM> arranged oppositely. Each of the second sidewalls <NUM> is connected with the first sidewalls <NUM> arranged oppositely. The first rotating member <NUM> is rotatably connected to the first sidewall <NUM>. The second rotating member <NUM> is rotatably connected to the second sidewall <NUM>.

In this implementation, the first rotating member <NUM> and the second rotating member <NUM> can be arranged on different sidewalls respectively, which can avoid a risk of collision during rotation when the first sub-rotating member and the second rotating member <NUM> are arranged on the same sidewall. Moreover, arranging the first rotating member <NUM> and the second rotating member <NUM> on different sidewalls can also facilitate a subsequent crank-slider movement.

Referring to <FIG>, <FIG> is a schematic view of a first sidewall of a first shaft case in an implementation of the disclosure. In this implementation, an orthographic projection (as illustrated by D2 in figures) of a rotation center of the second rotating member <NUM> on the first sidewall <NUM> is spaced apart from a rotation center (as illustrated by D1 in figures) of the first rotating member <NUM>.

In the electronic assembly <NUM> provided in the disclosure, the flexible screen <NUM> can be subsequently mounted on the movable plates <NUM> and the housings <NUM>, and bending of the flexible screen <NUM> can realized by controlling bending of the electronic assembly <NUM>. According to a shape of the flexible screen <NUM> after being bent, the flexible screen <NUM> can generally be classified into two types: "U-shaped screen" and "drop-shaped screen". "U-shaped screen" means that the flexible screen <NUM> is in a shape of the letter U. "Drop-shaped screen" means that the flexible screen <NUM> is in a shape of a water drop, that is, the flexible screen <NUM> has a structure that is wide at the bottom and narrow at the top. A "U-shaped screen" can make the overall electronic device <NUM> thicker, while a "drop-shaped screen" can make the overall electronic device <NUM> thinner. In an implementation, the orthographic projection of the rotation center of the second rotating member <NUM> on the first sidewall <NUM> can coincide with the rotation center of the first rotating member <NUM>, that is, the first rotating member <NUM> and the second rotating member <NUM> are rotated coaxially, which allows the flexible screen <NUM> to be a "U-shaped screen" after installation. In this implementation, the orthographic projection of the rotation center of the second rotating member <NUM> on the first sidewall <NUM> can be spaced apart from the rotation center of the first rotating member <NUM>, that is, the rotation center of the first rotating member <NUM> does not coincide with the rotation center of the second rotating member <NUM>, and the first rotating member <NUM> and the second rotating member <NUM> do not rotate coaxially. In this way, when the first rotating member <NUM> and the second rotating member <NUM> are rotated, a crank-slider movement is formed, so that the movable plate <NUM> is inclined at an angle relative to the rotating arm and the housing <NUM>, thus a position distance is formed, and a drop-shaped screen is eventually formed.

Referring to <FIG> and <FIG> together, <FIG> is a schematic perspective structural view of a first shaft case and a rotating unit in another implementation of the disclosure. In this implementation, the movable plate <NUM> has a first sliding portion <NUM>. The second rotating member <NUM> has a second sliding portion <NUM>. The first sliding portion <NUM> and the second sliding portion <NUM> cooperate with each other to allow the movable plate <NUM> to slide relative to the second rotating member <NUM>.

As can be seen from above, the drop-shaped screen can be formed by the crank-slider movement. In order to realize the crank-slider movement, the disclosure can control and compensate the movable plate <NUM> or the housing <NUM>, to increase a distance between one end of the movable plate <NUM> or the housing <NUM> away from the first shaft case <NUM> and the first shaft case <NUM>, such that the electronic assembly <NUM> can be rotated normally, and the drop-shaped screen is eventually realized. In this implementation, it is realized by controlling and compensating the movable plate <NUM>. In an implementation, the movable plate <NUM> may have the first sliding portion <NUM>, and the second rotating member <NUM> may have the second sliding portion <NUM>. The movable plate <NUM> is slidable relative to the second rotating member <NUM> by mutual cooperation between the first sliding portion <NUM> and the second sliding portion <NUM>. In an implementation, the first sliding portion <NUM> may be a sliding groove or a sliding block, and the second sliding portion <NUM> may be a sliding block or a sliding groove. It can also be understood that when the first sliding portion <NUM> is a sliding groove, the second sliding portion <NUM> is a sliding block. When the first sliding portion <NUM> is a sliding block, the second sliding portion <NUM> is a sliding groove. In this implementation, as an example, the first sliding portion <NUM> is a sliding groove, and the second sliding portion <NUM> is a sliding block.

Referring to <FIG>, <FIG> is a schematic perspective structural view of a movable plate and a housing in another implementation of the disclosure, which is an embodiment of the invention. In this implementation, the movable plate <NUM> has a first rotating portion <NUM> at one end thereof. The housing <NUM> has a second rotating portion <NUM>. The first rotating portion <NUM> and the second rotating portion <NUM> cooperate with each other to allow the movable plate <NUM> to be rotatably connected with the housing <NUM> at one end of the movable plate <NUM>.

As can be seen from above, when the crank-slider movement is performed, both the movable plates <NUM> and the housings <NUM> will rotate, and the disclosure is implemented by compensating the movable plates <NUM>. In order to achieve the drop-shaped screen, in the disclosure, the movable plate <NUM> will also be inclined at an angle with relative to the rotating arm and the housing <NUM> after the crank-slider movement, that is, the movable plate <NUM> will also rotate relative to the housing <NUM>. Therefore, in this implementation, which is an embodiment of the invention, the movable plate <NUM> has the first rotating portion <NUM> at one end of the movable plate <NUM>, and the housing <NUM> has the second rotating portion <NUM>. The movable plate <NUM> is rotatable relative to the housing <NUM> through cooperation between the first rotating portion <NUM> and the second rotating portion <NUM>. In an implementation, the first rotating portion <NUM> may be a guide rail or a sliding groove, and the second rotating portion <NUM> may be a sliding groove or a guide rail. It can also be understood that when the first rotating portion <NUM> is a guide rail, the second rotating portion <NUM> is a sliding groove. When the first rotating portion <NUM> is a sliding groove, the second rotating portion <NUM> is a guide rail. In this implementation, as an example, the first rotating portion <NUM> is a guide rail and the second rotating portion <NUM> is a sliding groove.

Referring to <FIG>, which is a schematic perspective structural view of a movable plate and a housing in another implementation of the disclosure. In this implementation, the first rotating portion <NUM> defines a rotating hole <NUM>. The second rotating portion <NUM> has a rotating member <NUM>. The first rotating portion <NUM> is sleeved with the rotating member <NUM> through the rotating hole <NUM> to allow the movable plate <NUM> to be rotatably connected with the housing <NUM> at one end of the movable plate <NUM>. In another implementation provided in the disclosure, the first rotating portion <NUM> defines the rotating hole <NUM>, the second rotating portion <NUM> has the rotating member <NUM>, and the first rotating portion <NUM> is sleeved on the rotating member <NUM>. In this way, the first rotating portion can rotate around the rotating member <NUM>, so that the movable plate <NUM> is rotatably connected with the housing <NUM> at one end of the movable plate <NUM>, and thus the movable plate <NUM> can rotate relative to the housing <NUM>.

Referring to <FIG> is a partial schematic perspective structural view of an electronic assembly in another implementation of the disclosure, and <FIG> is a partial schematic perspective structural view of a first shaft case, a second shaft case, and a first rotating member in another implementation of the disclosure. In this implementation, the electronic assembly <NUM> further includes second shaft cases <NUM> connected with the first sidewalls <NUM>. The first rotating member <NUM> is disposed between the first sidewall <NUM> and the second shaft case <NUM>.

In the disclosure, a second shaft case <NUM> can be further provided. The second shaft case <NUM> can be disposed on one side of the first sidewall <NUM> and connected with the first sidewall <NUM>. The first rotating member <NUM> is disposed between the first sidewall <NUM> and the second shaft case <NUM>, so as to effectively protect the first rotating member <NUM> and prevent the first rotating member <NUM> from collision with external objects. Secondly, the second shaft case <NUM> and the first sidewall <NUM> can also cooperate with each other, so that the first rotating member <NUM> can be rotatably connected to the first shaft case <NUM> indirectly. Referring to <FIG>, in this implementation, the first sidewall <NUM> has a first positioning portion <NUM>. The second shaft case <NUM> further has a second positioning portion <NUM>. The first positioning portion <NUM> and the second positioning portion <NUM> cooperate with each other to allow the second shaft case <NUM> to be connected with the first sidewall <NUM>. The first rotating member <NUM> is sleeved on the first positioning portion <NUM> or the second positioning portion <NUM>.

In the disclosure, the first sidewall <NUM> can define the first positioning portion <NUM>. The second shaft case <NUM> has the second positioning portion <NUM>. The first positioning portion <NUM> and the second positioning portion <NUM> cooperate with each other to allow the second shaft case <NUM> to be connected with the first sidewall <NUM>. In an implementation, the first positioning portion <NUM> may be a groove or a bump, and the second positioning portion <NUM> may be a bump or a groove. It can also be understood that when the first positioning portion <NUM> is a groove, the second positioning portion <NUM> is a bump, and when the first positioning portion <NUM> is a bump, the second positioning portion <NUM> is a groove. In this implementation, the first positioning portion <NUM> is a groove, and the second positioning portion <NUM> is a bump. Secondly, the first rotating member <NUM> can also be sleeved on the first positioning portion <NUM> or the second positioning portion <NUM>, that is, the first rotating member <NUM> can be sleeved on the bump for rotation. For example, in this implementation, the first rotating member <NUM> can be sleeved on the second positioning portion <NUM> of the second shaft case <NUM>, so that the first rotating member <NUM> can be rotatably connected with the first shaft case <NUM> indirectly.

Referring to <FIG>, which is a partial schematic perspective structural view of a first shaft case and a second rotating member in another implementation of the disclosure. In this implementation, the second sidewall <NUM> has a third rotating portion <NUM>. The second rotating member <NUM> has a fourth rotating portion <NUM>. The third rotating portion <NUM> and the fourth rotating portion <NUM> cooperate with each other to allow the second rotating member <NUM> to be rotatably connected with the second sidewall <NUM>.

In the disclosure, the second sidewall <NUM> is provided with the third rotating portion <NUM>. The second rotating member <NUM> is provided with the fourth rotating portion <NUM>. The third rotating portion <NUM> and the fourth rotating portion <NUM> cooperate with each other to allow the second rotating member <NUM> to be rotatably connected with the second sidewall <NUM>. In an implementation, the third rotating portion <NUM> can be a rotating groove or a rotating shaft, and the fourth rotating portion <NUM> can be a rotating shaft or a rotating groove. It can also be understood that, when the third rotating portion <NUM> is a rotating groove, the fourth rotating portion <NUM> is a rotating shaft. When the third rotating portion <NUM> is the rotating shaft, the fourth shaft assembly <NUM> is the rotating groove. In this implementation, as an example, the third rotating portion <NUM> is the rotating groove, and the fourth rotating portion <NUM> is the rotating shaft. As illustrated in <FIG>, the second sidewall <NUM> defines the rotating grooves which opposite to each other, and the second rotating member <NUM> has the rotating shafts on two opposite sides of the second rotating member <NUM>. The second rotating member <NUM> can rotate relative to the first shaft case <NUM> by simply inserting the rotating shaft into the rotating groove.

Referring to <FIG>, which is a schematic cross-sectional view of an electronic assembly in another implementation of the disclosure. In this implementation, the first rotating members <NUM> at least partially disposed at the two opposite sides of the first shaft case <NUM> are a first rotating member (A) <NUM> and a first rotating member <NUM>(B) <NUM>. The electronic assembly <NUM> further includes a synchronization mechanism <NUM>. The synchronization mechanism <NUM> is connected with the first rotating member (A) <NUM> and the first rotating member <NUM>(B) <NUM> to allow the first rotating member (A) <NUM> and the first rotating member <NUM>(B) <NUM> to synchronously rotate.

The number of the first rotating members <NUM> of the disclosure is symmetrical. That is, the first rotating members <NUM> (i.e., the first rotating member (A) <NUM> and the first rotating member <NUM>(B) <NUM>) are arranged at a left side and a right side of the first shaft case <NUM>. In this disclosure, a synchronization mechanism <NUM> can be further provided. The synchronization mechanism <NUM> connects the first rotating member (A) <NUM> and the first rotating member <NUM>(B) <NUM>. As such, when the first rotating member (A) <NUM> rotates, with aid of the synchronization mechanism <NUM>, the first rotating member <NUM>(B) <NUM> can also rotate together, which makes the housings <NUM> and the movable plates <NUM> on the two opposite sides rotate together, symmetry effects when the electronic assembly <NUM> is rotated are improved.

Referring to <FIG>, in this implementation, the synchronization mechanism includes a first gear <NUM> and a second gear <NUM>. The first rotating member (A) <NUM> is rotatably connected with the first gear <NUM>. The first gear <NUM> is rotatably connected with the second gear <NUM>. The second gear <NUM> is rotatably connected with the first rotating member <NUM>(B) <NUM>.

In the disclosure, the synchronization mechanism <NUM> can be implemented in two ways. In an implementation of the disclosure, the synchronization mechanism includes a first gear <NUM> and a second gear <NUM>. The first gear <NUM> is rotatably connected with the first rotating member (A) <NUM> and the second gear <NUM>. The second gear <NUM> is rotatably connected with the first rotating member <NUM>(B) <NUM> and the first gear <NUM>. When the first rotating member (A) <NUM> is rotated, the first rotating member <NUM>(B) <NUM> can be rotated synchronously through transmission of the first gear <NUM> and the second gear <NUM>.

Referring to <FIG>, in this implementation, the first rotating member <NUM> has multiple hobbed teeth <NUM> on a peripheral side surface of the first rotating member <NUM>. The multiple hobbed teeth <NUM> are arranged around at least one quarter of the peripheral side surface of the first rotating member <NUM>.

In the disclosure, the first rotating member <NUM> can have multiple hobbed teeth <NUM> arranged on the peripheral side surface of the first rotating member <NUM>. With aid of meshing between the hobbed teeth <NUM> with the first gear <NUM> and meshing between the hobbed teeth <NUM> and the second gear <NUM>, rotational connections can be realized. One side of the electronic assembly <NUM> is usually rotated by at least <NUM>°, and thus in the disclosure, the multiple hobbed teeth <NUM> are arranged around at least one quarter of the peripheral side surface of the first rotating member <NUM>, and the number of the hobbed teeth <NUM> is determined according to a rotation angle, which reduces the weight of the first rotating member <NUM>.

Referring to <FIG>, <FIG> is a schematic structural view of a synchronization mechanism in another implementation of the disclosure, <FIG> is an exploded view of <FIG>, <FIG> is a schematic structural view of a first bracket, a first internal gear, and a first spur gear in <FIG>, <FIG> is a schematic structural view of a second bracket, a second internal gear, and a second spur gear in <FIG>, and <FIG> is a schematic diagram illustrating cooperation of the first internal gear, the second internal gear, the first spur gear, and the second spur gear in <FIG>. A synchronization mechanism <NUM> is also provided in the disclosure. In this implementation, the synchronization mechanism <NUM> can be received in the first shaft case <NUM>. The synchronization mechanism <NUM> includes a first bracket <NUM> and a second bracket <NUM> connected with the first bracket <NUM>, a first internal gear <NUM> and a second internal gear <NUM>, and a first spur gear <NUM> and a second spur gear <NUM>. The first bracket <NUM> and the second bracket <NUM> are received in the first shaft case <NUM>. The first bracket <NUM> defines a first receiving space <NUM> therein. The second bracket <NUM> defines a second receiving space <NUM> therein. The first internal gear <NUM> is received in the first receiving space <NUM> and rotatable relative to the first bracket <NUM>. The second internal gear <NUM> is received in the second receiving space <NUM> and rotatable relative to the second bracket <NUM>. The first rotating member (A) <NUM> is connected with the first internal gear <NUM>. The first rotating member <NUM>(B) <NUM> is connected with the second internal gear <NUM>. The first internal gear <NUM> defines a first accommodating space <NUM> therein. The second internal gear <NUM> defines a second accommodating space <NUM> therein. The first spur gear <NUM> has a first sub-spur gear <NUM> received in the first accommodating space <NUM> and a second sub-spur gear <NUM> disposed outside the first accommodating space <NUM>. The first sub-spur gear <NUM> is rotatably connected with the first internal gear <NUM>. The second spur gear <NUM> has a third sub-spur gear <NUM> received in the second accommodating space <NUM> and a fourth sub-spur gear <NUM> disposed outside the second accommodating space <NUM>. The third sub-spur gear <NUM> is rotatably connected with the second internal gear <NUM>. The fourth sub-spur gear <NUM> is rotatably connected with the second sub-spur gear <NUM>. When the first rotating member (A) <NUM> rotates, the first internal gear <NUM>, the second internal gear <NUM>, the first spur gear <NUM>, and the second spur gear <NUM> cooperate to allow the first rotating member (A) <NUM> and the first rotating member <NUM>(B) <NUM> to synchronously rotate.

In the disclosure, the first bracket <NUM> is used for mounting the first internal gear <NUM> and the first spur gear <NUM>, and the second bracket <NUM> is used for mounting the second internal gear <NUM> and the second spur gear <NUM>. Further, in the disclosure, the first bracket <NUM> can be connected with the second bracket <NUM>, which can reduce difficulty in forming gear pairs and reduce a size of the synchronization mechanism <NUM>.

In the disclosure, the first internal gear <NUM> and the second internal gear <NUM> are further provided. In an implementation, an internal gear refers to a gear with teeth cut on an internal surface of a cylinder. In the disclosure, the first internal gear <NUM> is disposed within the first receiving space <NUM> and is rotatable relative to the first bracket <NUM>. In addition, in the disclosure, the first rotating member (A) <NUM> is connected with the first internal gear <NUM>. In this way, the first internal gear <NUM> in rotation can drive the first rotating member (A) <NUM> to rotate, such that the first rotating member (A) <NUM> is rotatably connected with the first shaft case <NUM> indirectly.

In the disclosure, the second internal gear <NUM> can also be received in the second receiving space <NUM> and rotatable relative to the second bracket <NUM>. In addition, in the disclosure, the first rotating member <NUM>(B) <NUM> is connected with the second internal gear <NUM>. In this way, the second internal gear <NUM> in rotation can drive the first rotating member <NUM>(B) <NUM> to rotate, such that the first rotating member <NUM>(B) <NUM> is rotatably connected with the first shaft case <NUM> indirectly. In an implementation, the first receiving space <NUM> is used for receiving the first internal gear <NUM>. As an example, a rotation direction of the first internal gear <NUM> is consistent with an arrangement direction of teeth of the first internal gear <NUM>. The second receiving space <NUM> is used for receiving the second internal gear <NUM>. As an example, a rotation direction of the second internal gear <NUM> is consistent with an arrangement direction of teeth of the second internal gear <NUM>.

In the disclosure, the first spur gear <NUM> and the second spur gear <NUM> are further provided. The first spur gear <NUM> includes the first sub-spur gear <NUM> received in the first accommodating space <NUM> and the second sub-spur gear <NUM> disposed outside the first accommodating space <NUM>. It can also be understood that, since the teeth of the first internal gear <NUM> are cut on an internal surface of a cylinder, part of the first spur gear <NUM> needs to be received in the first accommodating space <NUM> and rotatably connected with the first internal gear <NUM>, and thus a gear pair is formed. The rest of the first spur gear <NUM> is disposed outside the first accommodating space <NUM>. The second spur gear <NUM> can be understood in the same way. The second spur gear <NUM> includes the third sub-spur gear <NUM> received in the second accommodating space <NUM> and the fourth sub-spur gear <NUM> disposed outside the second accommodating space <NUM>. It can also be understood that, since the teeth of the second internal gear <NUM> are cut on an internal surface of a cylinder, part of the second spur gear <NUM> needs to be received in the second accommodating space <NUM> and rotatably connected with the second internal gear <NUM>, and thus a gear pair is formed. The rest of the second spur gear <NUM> is disposed outside the second accommodating space <NUM> and is rotatably connected with the rest of the first spur gear <NUM> which is disposed outside the first accommodating space <NUM>. That is, the fourth sub-spur gear <NUM> and the second sub-spur gear <NUM> are rotatably connected with each other to form a gear pair.

To sum up, in the synchronization mechanism <NUM> provided in the disclosure, by using two internal gears and two spur gears, a total of four gears cooperate with one another to form three gear pairs. It can also be understood that, the first internal gear <NUM> and the first sub-spur gear <NUM> cooperate with each other to form a first gear pair, the second sub-spur gear <NUM> and the fourth sub-spur gear <NUM> cooperate with each other to form a second gear pair, and the third sub-spur gear <NUM> and the second internal gear <NUM> cooperate with each other to form a third gear pair. The first rotating member (A) <NUM> in rotation drives the first internal gear <NUM> to rotate, the first internal gear <NUM> rotates synchronously with the first sub-spur gear <NUM>, the first sub-spur gear <NUM> rotates synchronously with the second sub-spur gear <NUM>, the second sub-spur gear <NUM> rotates synchronously with the fourth sub-spur gear <NUM>, the fourth sub-spur gear <NUM> rotates synchronously with the third sub-spur gear <NUM>, and the third sub-spur gear <NUM> rotates synchronously with the second internal gear <NUM>. Since the second internal gear <NUM> is connected with the first rotating member <NUM>(B) <NUM>, synchronous rotation of the first rotating member (A) <NUM> and the second rotating member <NUM> (B) can be eventually realized. The synchronization mechanism <NUM> provided in the disclosure has a simple structure, and can realize the synchronous rotation of the first rotating member (A) <NUM> and the second rotating member <NUM> (B) by using three gear pairs. The number of gear pairs is reduced, which can reduce an accumulated backlash, improve synchronization effects of the synchronization mechanism <NUM>, and at the same time ensure structural precision of the synchronization mechanism.

Referring to <FIG>, which is a schematic structural view of a first spur gear and a second spur gear in an implementation of the disclosure. In this implementation, the second sub-spur gear <NUM> has a diameter larger than the first sub-spur gear <NUM>, the fourth sub-spur gear <NUM> has a diameter larger than the third sub-spur gear <NUM>.

When the synchronization mechanism <NUM> is in motion, that is, when the first internal gear <NUM> and the second internal gear <NUM> rotate synchronously, a slight distance deviation may occur between the first spur gear <NUM> and the second spur gear <NUM>. For example, when each of the first internal gear <NUM> and the second internal gear <NUM> rotates by <NUM>°, if the second sub-spur gear <NUM> has a diameter equal to the first sub-spur gear <NUM> and the fourth sub-spur gear <NUM> has a diameter equal to the third sub-spur gear <NUM>, a certain gap may exist between the second sub-spur gear <NUM> and the fourth sub-spur gear <NUM>, resulting in incomplete meshing. Hence, in the disclosure, the second sub-spur gear <NUM> has a diameter larger than the first sub-spur gear <NUM>, the fourth sub-spur gear <NUM> has a diameter larger than the third sub-spur gear <NUM>, such that the second sub-spur gear <NUM> and the fourth sub-spur gear <NUM> can fully mesh with each other no matter how much degrees the first internal gear <NUM> and the second internal gear <NUM> rotate, which improves the synchronization effects of the synchronization mechanism <NUM>.

Referring to <FIG>, which is a partial schematic perspective structural view of an electronic assembly in another implementation of the disclosure. In this implementation, the first shaft case <NUM> further has a baffle plate <NUM>. The baffle plate <NUM>, the first sidewall <NUM>, and the second sidewalls <NUM> arranged oppositely define a third receiving space <NUM>. The electronic assembly <NUM> further includes a damping mechanism <NUM> at least partially received in the third receiving space <NUM>. The damping mechanism <NUM> includes an elastic member <NUM>, a first limiting portion <NUM>, and a second limiting portion <NUM>. The first limiting portion <NUM> has one end extended through the first sidewall <NUM> and connected with the first gear <NUM> and the other end abutted against one end of the elastic member <NUM>. The second limiting portion <NUM> has one end extended through the first sidewall <NUM> and connect with the second gear <NUM> and the other end abutted against the end of the elastic member <NUM>. The elastic member <NUM> has the other end connected with the baffle plate <NUM> and the elastic member <NUM> is in a compressed state.

In the disclosure, the baffle plate <NUM> can be further provided, such that the baffle plate <NUM>, the first sidewall <NUM>, and the second sidewall <NUM> can cooperate with one another to define a third receiving space <NUM>. The damping mechanism <NUM> is further received in the third receiving space <NUM>. In an implementation, the damping mechanism <NUM> is used to prevent the electronic assembly <NUM> from being arbitrarily bent. It can also be understood that the damping mechanism <NUM> is used to prevent the electronic assembly <NUM> from being bent when a small external force is applied. Several implementations are provided in the disclosure. In an implementation, the first limiting portion <NUM> is connected with the first gear <NUM>, so that when the first gear <NUM> rotates, the first limiting portion <NUM> is driven to rotate together. The second limiting portion <NUM> can be understood in the same way. The elastic member <NUM> abuts against the first limiting portion <NUM> and the second limiting portion <NUM> at one end and is connected with the baffle plate <NUM> at the other end, and the elastic member <NUM> remains in a compressed state. That is, regardless of whether the electronic assembly <NUM> is in an unfolded state or a folded state, the elastic member <NUM> remains in a compressed state. Here, the elastic member <NUM> applies a restoring force to the first limiting portion <NUM> and the second limiting portion <NUM>, and a direction of the restoring force is perpendicular to the first sidewall <NUM>. When the electronic component <NUM> is subjected to a relatively small external force, the external force can be counteracted by the restoring force, so that the electronic component <NUM> will not be rotated. Only when a force applied to the housing <NUM> is greater than a certain value, the restoring force will be counteracted, so that the electronic assembly <NUM> starts to rotate.

Referring to <FIG>, which is a partial schematic perspective structural view of an electronic assembly in another implementation of the disclosure. In this implementation, the damping mechanism <NUM> further includes a third limiting portion <NUM>. The third limiting portion <NUM> has one end connected with the elastic member <NUM> and the other end abutted against the first limiting portion <NUM> and the second limiting portion <NUM>.

In a second implementation of the disclosure, the third limiting portion <NUM> can be further disposed between the elastic member <NUM> and the first/second limiting portion <NUM>/<NUM>. The third limiting portion <NUM> is connected with the elastic member <NUM> at one end of the third limiting portion <NUM> and abutted against the first limiting portion <NUM> and the second limiting portion <NUM> at the other end of the third limiting portion <NUM>. Hence, the restoring force is transferred to the first limiting portion <NUM> and the second limiting portion <NUM> through the third limiting portion <NUM>, and structural stability of the damping mechanism <NUM> is improved by abutting the third limiting portion <NUM> against the first limiting portion <NUM> and the second limiting portion <NUM>.

Referring to <FIG> is a schematic perspective structural view of a first limiting portion and a second limiting portion in another implementation of the disclosure, and <FIG> is a front view of a first limiting portion and a second limiting portion in another implementation of the disclosure. In this implementation, a side surface of the first limiting portion <NUM> close to the third limiting portion <NUM> is a first flat surface <NUM>, and a side surface of the third limiting portion <NUM> close to the first limiting portion <NUM> is a second flat surface <NUM>. The first limiting portion <NUM> has a first protruding portion <NUM> protruded from part of the first flat surface <NUM>. The first protruding portion <NUM> has a first inclined surface <NUM> connected with the first flat surface <NUM>. The third limiting portion <NUM> has a second protruding portion <NUM> protruded from part of the second flat surface <NUM>. The second protruding portion <NUM> has a second inclined surface <NUM> connected with the second flat surface <NUM>. When the electronic assembly <NUM> is in an unfolded state, the first flat surface <NUM> abuts against the second flat surface <NUM>, and the first inclined surface <NUM> abuts against the second inclined surface <NUM>. When the electronic assembly <NUM> rotates, the first limiting portion <NUM> abuts against the second inclined surface <NUM>. In an implementation, the first flat surface <NUM> and the second flat surface <NUM> are parallel to first sidewall <NUM>. Alternatively, it can also be understood that the first flat surface <NUM> and the second flat surface <NUM> are parallel to a rotation direction of the electronic assembly <NUM>.

In an implementation of the disclosure, the first limiting portion <NUM> can also has a first protruding portion <NUM>, and the first protruding portion <NUM> has a first inclined surface <NUM>. The third limiting portion <NUM> has the second protruding portion <NUM>, and the second protruding portion <NUM> has a second inclined surface <NUM>. In this case, when the electronic assembly <NUM> is in the unfolded state, the first flat surface <NUM> abuts against the second flat surface <NUM>, the first inclined surface <NUM> abuts against the second inclined surface <NUM>, and the restoring force of the elastic member <NUM> can be transferred to the first flat surface <NUM> of the first limiting portion <NUM> through the second flat surface <NUM> of the third limiting portion <NUM>, so that the electronic assembly <NUM> can be avoided from being rotated when subjected to a small external force. When the electronic assembly <NUM> starts to rotate, the housing <NUM> drives the first rotating member (A) <NUM> to rotate, the first rotating member (A) <NUM> drives the first gear <NUM> to rotate, and the first gear <NUM> drives the first limiting portion <NUM> to rotate, and then, the first flat surface <NUM> will be separated from the second flat surface <NUM>, and only the first limiting portion <NUM> abuts against the second inclined surface <NUM>. In an implementation, the first inclined surface <NUM> of the first limiting portion <NUM> abuts against the second inclined surface <NUM>, or other parts of the first limiting portion <NUM> abut against the second inclined surface <NUM>, as such, the restoring force transferred by the second inclined surface <NUM> on the first limiting portion <NUM> can be decomposed into components which include a rotating force, which can make the electronic assembly <NUM> return to the unfolded state by itself when the electronic assembly <NUM> is free of an external force. For example, when a user applies an external force to the electronic assembly <NUM> and rotates the electronic assembly <NUM> by <NUM>°, the electronic assembly <NUM> can automatically return to the unfolded state upon removing the external force. In addition, when the first limiting portion <NUM> is rotated, due to an interaction between the second inclined surface <NUM> and the first protruding portion <NUM>, the third limiting portion <NUM> can be moved toward the baffle plate <NUM>, which further compresses the elastic member <NUM> and then improves the restoring force of the elastic member <NUM>.

Referring to <FIG>, in this implementation, the first protruding portion <NUM> further has a third flat surface <NUM> connected with the first inclined surface <NUM>. The third flat surface <NUM> is parallel to the first flat surface <NUM>. The second protruding portion <NUM> further has a fourth flat surface <NUM> connected with the second inclined surface <NUM>. The fourth flat surface <NUM> is parallel to the second flat surface <NUM>. When the electronic assembly <NUM> is folded to a predetermined angle, the second flat surface <NUM> abuts against the fourth flat surface <NUM>. In an implementation, the third flat surface <NUM> and the fourth flat surface <NUM> are parallel to the first sidewall <NUM>. Alternatively, it can also be understood that the third flat surface <NUM> and the fourth flat surface <NUM> are parallel to the rotation direction of the electronic assembly <NUM>.

In this implementation, the first protruding portion <NUM> further has the third flat surface <NUM> connected with the first inclined surface <NUM>, and the second protruding portion <NUM> further has the fourth flat surface <NUM> connected with the second inclined surface <NUM>. As such, when the electronic assembly <NUM> rotates to a predetermined angle, the second flat surface <NUM> abuts against the fourth flat surface <NUM>. Here, the restoring force is transferred to the second flat surface <NUM> through the fourth flat surface <NUM>, so that the electronic assembly <NUM> can be prevented from rotating under a small external force. For example, when the user applies an external force to the electronic assembly <NUM> and rotates the electronic assembly <NUM> by <NUM>°, firstly, the electronic assembly <NUM> may not automatically recover to the unfolded state upon removing the external force, and secondly, the electronic assembly <NUM> is further prevented from being rotated under a small external force.

As an example, in the above-mentioned implementations, only the first limiting portion <NUM> and the third limiting portion <NUM> are described in structures. The second limiting portion <NUM> can also have the same structure, that is, the second limiting portion <NUM> may also have a protruding portion on a flat surface of the second limiting portion <NUM>, and the protruding portion also has an inclined surface and a flat surface. Here, the third limiting portion <NUM> may also have a protruding portion, and the protruding portion also has an inclined surface and a flat surface. Further, in an implementation, the first limiting portion <NUM>, the second limiting portion <NUM>, and the third limiting portion <NUM> may be arranged in an axis-symmetric manner, which can further improve the damping and limiting effects of the electronic assembly <NUM>.

In addition to the electronic assembly <NUM> described above, an electronic device <NUM> is further provided in implementations of the disclosure. Both the electronic device <NUM> and the electronic assembly <NUM> provided in the disclosure can realize inventiveness of the disclosure. As an example, the electronic device <NUM> described hereinafter can include the electronic assembly <NUM> provided above.

Referring to <FIG>, <FIG> is a partial top view of an electronic device in an unfolded state in an implementation of the disclosure, <FIG> is a cross-sectional view of <FIG> taken along direction C-C, <FIG> is a schematic perspective structural view of an electronic device in a folded state in an implementation of the disclosure, <FIG> is a top view of <FIG>, and <FIG> is a cross-sectional view of <FIG> taken along direction D-D. An electronic device <NUM> provided in this implementation includes a flexible screen <NUM> and the electronic assembly <NUM> provided in the foregoing implementations of the disclosure. The flexible screen <NUM> is mounted on the movable plate <NUM> of the electronic assembly <NUM>.

The electronic device <NUM> provided in the disclosure includes, but is not limited to, a cell phone, a tablet, a laptop, a personal computer (PC), a personal digital assistants (PDA), a portable media player (PMP), a navigation device, a wearable device, a smart bracelet, a pedometer, and other mobile terminals, as well as a fixed terminal such as a digital television (TV) and a desktop computer.

In the electronic device <NUM> provided in the disclosure, the flexible screen <NUM> can be mounted on the movable plates <NUM> to allow the flexible screen <NUM> to be bent inwardly, that is, when the electronic device <NUM> is bent, the flexible screen <NUM> is not exposed, instead, the flexible screen <NUM> is protected by the housings <NUM>. It is clear from the above that when the housings <NUM> are bent under an external force, the housings <NUM> can drive the movable plates <NUM> to bend together, and the movable plates <NUM> in turn drive the flexible screen <NUM> on the movable plates <NUM> to bend. In the electronic device <NUM> provided in the disclosure, with aid of the electronic assembly <NUM> provided in above implementation of the disclosure, the electronic device <NUM> can be bent, and the drop-shaped screen is also achieved, which reduces an accumulated amount of the displacements after falling, improves the quality of the electronic device <NUM>, and ensures precision of the electronic device <NUM>.

Referring to <FIG>, in this implementation, the first shaft case <NUM> defines an avoidance groove <NUM> on one side of the first shaft case <NUM> close to the flexible screen <NUM>. The avoidance groove <NUM> is configured to receive part of the flexible screen <NUM> when the electronic device <NUM> is bent. During bending of the electronic device <NUM>, the flexible screen <NUM> will have a certain displacement in a direction towards the first shaft case <NUM> at a position where the flexible screen <NUM> is bent. Thus, in the disclosure, the first shaft case <NUM> can define the avoidance groove <NUM> on one side of the first shaft case <NUM> close to the flexible screen <NUM>, so that when the flexible screen <NUM> is bent, the avoidance groove <NUM> may accommodate part of the flexible screen <NUM> that is displaced in the direction towards the first shaft case <NUM>, which can prevent the flexible screen <NUM> during bending from collision with the first shaft case <NUM> and protect the flexible screen <NUM>.

Claim 1:
An electronic assembly (<NUM>), comprising a shaft assembly (<NUM>) and housings (<NUM>) arranged oppositely, the shaft assembly (<NUM>) comprising:
a first shaft case (<NUM>), the housings (<NUM>) being at least partially disposed at two opposite sides of the first shaft case (<NUM>);
first rotating members (<NUM>) at least partially disposed at the two opposite sides of the first shaft case (<NUM>), each of the first rotating members (<NUM>) having one end rotatably connected with the first shaft case (<NUM>) and the other end connected with the housings (<NUM>); and
rotating units (<NUM>) at least partially disposed at the two opposite sides of the first shaft case (<NUM>), each of the rotating units (<NUM>) comprising a second rotating member (<NUM>) and a movable plate (<NUM>), the second rotating member (<NUM>) having one end rotatably connected with the first shaft case (<NUM>) and the other end connected with the movable plate (<NUM>), and the movable plate (<NUM>) having one end connected to the housings (<NUM>);
characterized in that:
the movable plate (<NUM>) has a first rotating portion (<NUM>) at one end thereof, the housing (<NUM>) has a second rotating portion (<NUM>), the first rotating portion (<NUM>) and the second rotating portion (<NUM>) cooperate with each other so that the movable plate (<NUM>) is in contact with and rotatably connected to the housing (<NUM>) at one end of the movable plate (<NUM>).