CN116006573A - Hinge assembly and electronic equipment - Google Patents

Abstract

The invention discloses a hinge assembly and an electronic device, wherein the hinge assembly comprises: the middle frame support is internally provided with a cavity; a hinge bracket; the first end of the synchronous swing arm is movably arranged in the cavity, and the second end of the synchronous swing arm is movably connected with the hinge bracket; the second end of the synchronous swing arm is provided with a plurality of limiting surfaces; one end of the virtual swing arm is connected with the middle frame support, and the other end of the virtual swing arm is connected with the hinge support; the matching piece is movably arranged on the hinge bracket and is provided with a plurality of matching surfaces; the magnetic attraction assembly is arranged on the middle frame support or the hinge support, the magnetic attraction assembly can be switched between an electrified state and a power-off state, the limiting surfaces can be respectively in limiting fit with the matching surfaces under the condition that the hinge support moves to different positions relative to the middle frame support, and the magnetic attraction assembly limits the synchronous swing arm or the matching piece to move when the magnetic attraction assembly is in the electrified state.

Description

Hinge assembly and electronic equipment

Technical Field

The invention belongs to the technical field of electronic product manufacturing, and particularly relates to a hinge assembly and electronic equipment.

Background

In recent years, the development trend of folding screen mobile phones is continuously rising, and the folding screen mobile phones are popular with users. Among all the parts of the folding screen mobile phone, the hinge is used as one of the most critical components, and plays a critical role in the integral folding and unfolding of the folding screen. However, in the existing folding screen mobile phone, the angle of the folding screen is not stable in hovering, and when a slight external force acts on the folding screen, for example, when the folding screen is placed in a car for navigation or shooting, the change of the hovering angle can be caused by the shake of the car body, so that the use experience of a user is greatly affected.

Disclosure of Invention

The invention aims to provide a hinge assembly and a technical scheme of electronic equipment, which at least can solve the problems of unstable hovering of a folding screen mobile phone and the like in the prior art.

In order to solve the technical problems, the invention is realized as follows:

in a first aspect, embodiments of the present invention provide a hinge assembly comprising: the middle frame support is internally provided with a cavity; the hinge bracket is arranged opposite to the middle frame bracket at intervals; the first end of the synchronous swing arm is movably arranged in the cavity, and the second end of the synchronous swing arm is movably connected with the hinge bracket; the second end of the synchronous swing arm is provided with a plurality of limiting surfaces;

the virtual swing arms are distributed at intervals with the synchronous swing arms, one end of each virtual swing arm is fixedly connected with the middle frame support, and the other end of each virtual swing arm is movably connected with the hinge support; the matching piece is movably arranged on the hinge bracket and is provided with a plurality of matching surfaces corresponding to the limiting surfaces;

the magnetic component is arranged on the middle frame support or the hinge support, the magnetic component can be switched between an electrified state and a power-off state, a plurality of limiting surfaces can be respectively in limiting fit with a plurality of matching surfaces under the condition that the hinge support moves to different positions relative to the middle frame support, and when the magnetic component is in the electrified state, the magnetic component limits the synchronous swing arm or the matching piece to move.

In a second aspect, an embodiment of the present invention provides an electronic device, including the hinge assembly described in the foregoing embodiment.

In the invention, the middle frame support, the hinge support, the synchronous swing arm and the virtual swing arm form a movable hinge structure, wherein a plurality of limiting surfaces are arranged at the second end of the synchronous swing arm, a plurality of matching surfaces are arranged on the matching piece, and in the moving process of the hinge assembly, the preliminary hovering of the hinge assembly at any folding position can be realized through the limiting cooperation of the limiting surfaces and the matching surfaces. Meanwhile, when the hinge bracket moves to an unexpected hovering position relative to the middle frame bracket, the magnetic attraction force is generated by electrifying the magnetic attraction component, so that the activity of the synchronous swing arm or the matching piece can be further limited, the hovering stability of the hinge component is improved, the hinge component can resist certain external force action under the double actions of the limiting matching of the limiting surface and the matching surface and the magnetic attraction component, the hovering angle is kept unchanged, the folding hovering stability and reliability of the hinge component are kept, and the use experience of a user is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a hinge assembly according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a hover locking mechanism built into a center frame bracket of a hinge assembly according to an embodiment of the invention;

FIG. 3 is a cross-sectional view of a hover locking mechanism built into a center frame bracket of a hinge assembly according to an embodiment of the invention;

FIG. 4 is a schematic illustration of a hover structure of a hinge assembly according to embodiments of the invention;

FIG. 5 is a force diagram of one hover structure of a hinge assembly according to embodiments of the invention.

Reference numerals:

a hinge assembly 100;

a center frame bracket 10;

a hinge bracket 20; a connecting shaft 21;

a synchronization swing arm 30; a first cam 31; a limit surface 311;

a virtual swing arm 40;

a mating member 50; a mating surface 51; a connection plate 52;

a first elastic member 60;

a pressing plate 71; a second elastic member 72; a first electromagnetic member 73; a first magnetic attraction member 74; a first wiring board 75;

a second electromagnetic member 81; a second wiring board 82; a second magnetic attraction member 83;

a middle frame 90.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description and claims of the present invention, the terms "first," "second," and the like, if any, may include one or more of those features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present invention, it should be understood that, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are referred to, the positional relationship indicated based on the drawings is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The hinge assembly 100 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 and 2, the hinge assembly 100 according to the embodiment of the present invention includes a center frame bracket 10, a hinge bracket 20, a synchronization swing arm 30, a dummy swing arm 40, a fitting 50, and a magnetic attraction assembly.

Specifically, a chamber is provided in the center frame bracket 10, and the hinge bracket 20 is disposed opposite to the center frame bracket 10 with a space therebetween. The first end of the synchronization swing arm 30 is movably disposed within the chamber, and the second end of the synchronization swing arm 30 is movably coupled to the hinge bracket 20. The second end of the synchronous swing arm 30 is provided with a plurality of limiting surfaces 311. The virtual swing arms 40 are distributed at intervals with the synchronous swing arms 30, one ends of the virtual swing arms 40 are fixedly connected with the middle frame support 10, and the other ends of the virtual swing arms 40 are movably connected with the hinge support 20. The matching piece 50 is movably arranged on the hinge bracket 20, and the matching piece 50 is provided with a plurality of matching surfaces 51 corresponding to the limiting surfaces 311. The plurality of stopper surfaces 311 can be stopper-fitted with the plurality of fitting surfaces 51, respectively, in the case where the hinge bracket 20 moves to different positions with respect to the center bracket 10.

The magnetic component is arranged on the middle frame support 10 or the hinge support 20, the magnetic component can be switched between an electrified state and a powered-off state, the limiting surfaces 311 can be respectively in limiting fit with the matching surfaces 51 under the condition that the hinge support 20 moves to different positions relative to the middle frame support 10, and the magnetic component limits the synchronous swing arm 30 or the matching piece 50 to move when the magnetic component is in the electrified state.

In other words, the hinge assembly 100 according to the embodiment of the present invention can be applied to electronic devices (e.g., electronic products such as folding screen mobile phones, folding computers, etc.). Referring to fig. 1 and 2, the hinge assembly 100 of the present invention is mainly composed of a center frame bracket 10, a hinge bracket 20, a synchronization swing arm 30, a virtual swing arm 40, a mating member 50, and a magnetic attraction assembly. Wherein, a chamber is arranged in the middle frame support 10, and the hinge support 20 and the middle frame support 10 are distributed at intervals. The first end of the synchronous swing arm 30 is movably arranged in the cavity, and the second end of the synchronous swing arm 30 is movably connected with the hinge bracket 20. The first end and the second end of the synchronization swing arm 30 may be understood as both ends of the synchronization swing arm 30 in the length direction. The synchronous swing arm 30 can be used as a synchronous swing arm, and a plurality of limiting surfaces 311 are arranged on the second end of the synchronous swing arm 30.

The virtual swing arms 40 and the synchronous swing arms 30 can be distributed in parallel at intervals, one end of each virtual swing arm 40 is fixedly connected with the middle frame support 10, and the other end of each virtual swing arm 40 is movably connected with the hinge support 20. The virtual swing arm 40 serves as a virtual swing arm of the hinge assembly 100, the virtual swing arm 40 does not move, the function of supporting the middle frame support 10 and the hinge support 20 is achieved, and the hinge support 20 can rotate around the virtual swing arm 40 in a fixed axis.

The matching piece 50 is movably arranged on the hinge bracket 20, the matching piece 50 is provided with a plurality of matching surfaces 51, and the matching surfaces 51 respectively correspond to the limiting surfaces 311. In the case that the hinge bracket 20 moves to different positions relative to the center bracket 10, the plurality of matching surfaces 51 can directly form limiting contact with the plurality of limiting surfaces 311, so that preliminary hovering of the hinge assembly 100 at any folding position is realized.

The magnetic assembly is provided on the center bracket 10 or the hinge bracket 20, and is switchable between an energized state and a de-energized state. When the magnetic component is electrified, magnetic acting force can be generated. When the magnetic component is powered off, the magnetic acting force disappears. In the case that the hinge bracket 20 moves to different positions relative to the center bracket 10, the plurality of limiting surfaces 311 can be respectively in limiting fit with the plurality of matching surfaces 51, so that preliminary hovering of the hinge assembly 100 at any folding position is realized. At this time, the magnetic component can be electrified, and the magnetic component generates a magnetic action, and the magnetic component further limits the movement of the synchronous swing arm 30 or the matching piece 50 through the magnetic action force, so that the hinge component 100 can hover more stably, and resists a certain external force action, and the hover angle is kept unchanged, so that the stability and reliability of the folding hover of the hinge component 100 are maintained, and the user experience is improved.

It should be noted that, when the hinge assembly 100 of the present invention is applied to a folding-screen electronic product (for example, a folding-screen mobile phone), the middle frame support 10 may be used as a middle frame support of the folding-screen mobile phone, the middle frame support is connected with the middle frame 90 (for example, a left middle frame) of the folding screen, and the virtual swing arm 40 may drive the middle frame support 10 and the middle frame 90 of the folding screen to perform a fixed-axis rotation, so as to support the opening and closing movement of the whole folding screen. The synchronous swing arm 30 rotates around the hinge bracket 20 under the drive of the middle frame bracket 10, the limiting surface 311 on the synchronous swing arm 30 is in limiting fit with the matching surface 51 on the matching piece 50, and meanwhile, the stable hovering of any angle of the folding mobile phone in the opening and closing process is further realized by the magnetic attraction of the magnetic attraction component through the on and off of the magnetic attraction component.

Thus, according to the hinge assembly 100 of the embodiment of the present invention, the middle frame support 10, the hinge support 20, the synchronous swing arm 30 and the virtual swing arm 40 form a movable hinge structure, wherein the plurality of limiting surfaces 311 are provided at the second end of the synchronous swing arm 30, the plurality of matching surfaces 51 are provided on the matching member 50, and in the moving process of the hinge assembly 100, the preliminary hovering of the hinge assembly 100 at any folding position can be realized through the limiting cooperation of the limiting surfaces 311 and the matching surfaces 51. Meanwhile, when the hinge bracket 20 moves to an unexpected hovering position relative to the center bracket 10, the magnetic attraction force is generated by electrifying the magnetic attraction assembly, so that the movement of the synchronous swing arm 30 or the matching piece 50 can be further limited, the hovering stability of the hinge assembly 100 is improved, the hinge assembly can resist certain external force action under the double effects of the limiting matching of the limiting surface 311 and the matching surface 51 and the magnetic attraction assembly, the hovering angle is kept unchanged, the folding hovering stability and reliability of the hinge assembly 100 are kept, and the user experience is improved.

According to one embodiment of the invention, the magnetic attraction assembly comprises a first electromagnetic member 73 and a first magnetic attraction member 74.

Specifically, the first electromagnetic member 73 is provided in the chamber. The first magnetic attraction piece 74 is arranged in the cavity, the first magnetic attraction piece 74 is connected with the middle frame support 10, the first magnetic attraction piece 74 corresponds to the first electromagnetic piece 73 in position, the first end of the synchronous swing arm 30 is located between the first magnetic attraction piece 74 and the first electromagnetic piece 73, the first electromagnetic piece 73 can be switched between a power-off state and a power-on state, and the first magnetic attraction piece 74 is separated from the first electromagnetic piece 73 under the condition that the first electromagnetic piece 73 is in the power-off state. When the first electromagnetic member 73 is in the energized state, the first electromagnetic member 73 and the first magnetic attraction member 74 attract each other, so that the limiting surface 311 abuts against the mating surface 51.

In other words, referring to fig. 2 and 3, the hinge assembly 100 may further include a first electromagnetic member 73 and a first magnetic attraction member 74. Wherein the first electromagnetic member 73 is installed in the chamber, and the first electromagnetic member 73 is installed on the pressing plate 71. The first electromagnet 73 may be an electromagnet. The first magnetic attraction piece 74 is installed in the chamber, and the first magnetic attraction piece 74 is connected with the middle frame support 10, and the first magnetic attraction piece 74 corresponds to the position of the first electromagnetic piece 73. The first magnetic attraction member 74 may employ a permanent magnet. The first end of the synchronization swing arm 30 is located between the first magnetic attraction piece 74 and the first electromagnetic piece 73. The first electromagnetic member 73 may be switchable between a power-off state and a power-on state, and in the case where the first electromagnetic member 73 is in the power-off state, the first electromagnetic member 73 does not generate a magnetic field, there is no interaction force on the first magnetic member 74, the first magnetic member 74 is separated from the first electromagnetic member 73, and the synchronization swing arm 30 may normally move. Under the condition that the first electromagnetic member 73 is in the electrified state, the first electromagnetic member 73 generates a magnetic field, the first electromagnetic member 73 and the first magnetic attraction member 74 attract each other and attract the synchronous swing arm 30, and the synchronous swing arm 30 cannot move, so that the hovering stability of the hinge assembly 100 is further improved.

According to one embodiment of the invention, the magnetic attraction assembly further comprises a pressure plate 71 and a second elastic member 72.

Specifically, the platen 71 is disposed within the chamber, and the first electromagnetic member 73 is disposed on the platen 71. The second elastic member 72 is disposed in the chamber, the second elastic member 72 supports the pressing plate 71, and the first end of the synchronization swing arm 30 is disposed between the pressing plate 71 and the center frame bracket 10. The pressing plate 71 is switchable between a first position and a second position, and in the case that the first electromagnetic member 73 is in the power-off state, the pressing plate 71 is spaced apart from the first end of the synchronization swing arm 30, the pressing plate 71 is in the first position, and the length of the second elastic member 72 is the first length. When the first electromagnetic member 73 is in the energized state, the pressing plate 71 is fixed in contact with the synchronization swing arm 30, the pressing plate 71 is in the second position, the length of the second elastic member 72 is a second length, and the first length is greater than the second length.

That is, as shown in fig. 2 and 3, a chamber is provided in the center frame bracket 10, and a first end of the synchronization swing arm 30 is movably provided in the chamber. The hinge assembly 100 further includes a pressing plate 71 and a second elastic member 72. Wherein the platen 71 is mounted within the chamber. The second elastic member 72 is installed in the chamber, and the second elastic member 72 can support the pressing plate 71. The second elastic members 72 may employ springs, and the number of the second elastic members 72 may be plural, and the plurality of second elastic members 72 may be disposed in the chamber of the middle frame support 10 at intervals to support the pressing plate 71.

The first end of the synchronization swing arm 30 is disposed between the pressing plate 71 and the center bracket 10. The pressure plate 71 is switchable between a first position and a second position. When the pressure plate 71 is in the first position, the pressure plate 71 is separated from the first end of the synchronization swing arm 30, and the synchronization swing arm 30 is movable within the chamber. At this time, the second elastic member 72 may be in a naturally elongated state, and the length of the second elastic member 72 is the first length. When the pressing plate 71 is at the second position, the pressing plate 71 is fixed in contact with the first end of the synchronous swing arm 30, so that the pressing plate 71 can press the synchronous swing arm 30, more sufficient acting force is provided for hovering of the hinge assembly 100, and hovering stability of the hinge assembly 100 is further improved. At this time, the second elastic member 72 is in a compressed state, and the length of the second elastic member 72 is the second length.

In some embodiments of the invention, the magnetic assembly further comprises: the first circuit board 75, the first circuit board 75 is connected with the first electromagnetic member 73, and the first circuit board 75 controls the first electromagnetic member 73 to be switchable between a power-off state and a power-on state.

In other words, as shown in fig. 2, the magnetic attraction assembly may further include a first circuit board 75, where the first circuit board 75 is connected to the first electromagnetic member 73, and the first circuit board 75 is capable of providing current to the first electromagnetic member 73, and controlling the first electromagnetic member 73 to switch between the power-off state and the power-on state, so as to achieve connection or disconnection of the synchronization swing arm 30 and the pressing plate 71.

In the present invention, the inside of the center frame bracket (center frame bracket 10) may be provided with a synchronous swing arm locking mechanism composed of the first electromagnetic member 73, the first magnetic attraction member 74, the second elastic member 72, the first circuit board 75, the pressing plate 71, and the like. The first electromagnetic member 73 and the first circuit board 75 may be fixed to the pressing plate 71K by double-sided tape, and may be housed in the middle frame bracket 10 together with the first magnetic member 74 to be supported. 4 second elastic members 72 (springs) are interposed between the pressing plate 71 and the center frame bracket 10. The springs act as supports in a conventional manner, pushing up the pressure plate 71 into contact with the upper surface of the chamber of the middle frame support 10. The first end of the first movable portion is interposed between the pressing plate 71 and the lower surface of the chamber of the center frame bracket 10.

When the user opens and closes the folding screen mobile phone in normal use, the first electromagnetic member 73 is non-conductive, and the second elastic member 72 pushes up the pressing plate 71. During the opening and closing process, the synchronous swing arm 30 can normally perform telescopic movement in the cavity of the middle frame support 10.

When a user needs to make a decoration in a severe environment or other uses need to use the hover locking function. The user can open the mobile phone interface or by means of a key. When the folding screen receives a signal, the first electromagnetic member 73 is energized through the first circuit board 75, thereby generating a magnetic field. The first electromagnetic member 73 and the first magnetic member 74 generate an attractive interaction, so that the pressing plate 71 is driven to move downwards, the synchronous swing arm 30 is pressed inside the middle frame support 10, and telescopic movement cannot be generated, so that the hinge assembly 100 cannot rotate. When the user cancels the hovering locking function, the first electromagnetic member 73 is not conductive, the second elastic member 72 is not acted by the pressure of the first electromagnetic member and the second electromagnetic member, the pressing plate 71 is supported and the normal working state is returned to the first position.

Of course, the above structure can be slightly adjusted, and is designed to be in a locking state in a normal state, and when a user touches the mobile phone, the program is adjusted to be in the normal state, so that the mobile phone can be normally folded for operation. When the mobile phone is adjusted to be placed at a certain angle for more than a few seconds and no motion is perceived, the mobile phone is automatically and intelligently locked.

According to one embodiment of the present invention, the mating element 50 further includes a connection plate 52, the connection plate 52 being connected to the hinge bracket 20. The magnetic attraction assembly further includes a second electromagnetic member 81, a second circuit board 82, and a second magnetic attraction member 83.

Specifically, the second electromagnetic member 81 is provided on the hinge bracket 20. The second circuit board 82 is connected to the second electromagnetic member 81, and the second circuit board 82 energizes or de-energizes the second electromagnetic member 81. The second magnetic attraction piece 83 is arranged on the connecting plate 52, the second magnetic attraction piece 83 corresponds to the second electromagnetic piece 81, and when the second electromagnetic piece 81 is electrified, the second magnetic attraction piece 83 and the second electromagnetic piece 81 repel each other, so that the matching surface 51 of the matching piece 50 abuts against the limiting surface 311.

That is, as shown in fig. 4 and 5, the mating piece 50 may further include a connection plate 52, and the connection plate 52 is connected with the hinge bracket 20. The magnetic attraction assembly may further include a second electromagnetic member 81, a second circuit board 82, and a second magnetic attraction member 83. Wherein the second electromagnetic member 81 is provided on the hinge bracket 20. The second electromagnetic member 81 may be an electromagnet, and the second circuit board 82 is connected to the second electromagnetic member 81, and the second circuit board 82 can energize or de-energize the second electromagnetic member 81. The second magnetic attraction piece 83 is disposed on the connection plate 52, the second magnetic attraction piece 83 may be a permanent magnet, and the second magnetic attraction piece 83 corresponds to the second electromagnetic piece 81. When the second electromagnetic member 81 is energized, the second magnetic attraction member 83 and the second electromagnetic member 81 repel each other, so that the mating surface 51 of the mating member 50 is more abutted against the stopper surface 311, and the hover stability of the hinge assembly 100 is further improved.

When the user needs to use the hover function, the hover function can be started through a key or touch screen operation, at this time, the second circuit board 82 connected with the mobile phone motherboard charges the second electromagnetic member 81, and generates a mutual repulsive force with the second magnetic member 83, so that the mating member 50 connected with the second magnetic member 83 is also subjected to a downward pushing force, so that the mutual pressure between the second cam of the mating member 50 and the first cam 31 on the synchronous swing arm 30 is larger, a larger cam surface friction force is generated, and further the torque required by rotation of the synchronous swing arm 30 is increased, so that more stable hover of the hinge assembly 100 is further realized (the repulsive force of the magnetic member is shown in an arrow direction in fig. 5).

When the user does not need to hover in a locking way and needs to normally switch on. The state is a normal state of the folding electronic equipment, the second electromagnetic member 81 is not electrified, and the pressure between the cam surfaces is in a proper state, so that the requirement of normal opening and closing of a user can be met.

According to one embodiment of the present invention, the hinge bracket 20 includes: the second end of the synchronous swing arm 30 is pivotally sleeved on the connecting shaft 21, and the matching piece 50 is pivotally sleeved on the connecting shaft 21.

That is, as shown in fig. 1, the hinge bracket 20 includes a connection shaft 21, the second end of the synchronization swing arm 30 is sleeved on the connection shaft 21, and the second end of the synchronization swing arm 30 can rotate around the connection shaft 21. The matching piece 50 is sleeved on the connecting shaft 21 and is movable relative to the axial direction of the connecting shaft 21. The second end of the synchronization swing arm 30 rotates about the connection shaft 21 during the movement of the hinge assembly 100 between the folding and the opening.

During the rotation process, the plurality of limiting surfaces 311 are continuously contacted and pressed with the plurality of matching surfaces 51 on the matching piece 50, so that the preliminary hovering of the hinge assembly 100 at any folding position is realized. And under the action of the limiting cooperation of the limiting surface 311 and the matching surface 51 and the magnetic force of the magnetic component, a certain external force can be resisted, and the hovering angle is kept unchanged, so that the stability and reliability of the folding hovering of the hinge component 100 are kept, and the use experience of a user is improved.

According to one embodiment of the present invention, the second end of the synchronization swing arm 30 forms a first cam 31, and a side of the first cam 31 facing the mating member 50 forms a plurality of first teeth, and a profile surface of each first tooth forms a limiting surface 311. The mating member 50 forms a second cam, and a side of the second cam facing the first cam 31 forms a plurality of second teeth, each of which has a profile surface formed with a limiting surface 311.

In other words, referring to fig. 1, the second end of the synchronization swing arm 30 may be provided as a first cam 31, and a side of the first cam 31 facing the mating piece 50 may be provided with a plurality of first teeth arranged in succession, each of which has a contour surface formed as a limit surface 311. The mating element 50 may be designed as a second cam, and the side of the second cam facing the first cam 31 may be designed as a plurality of consecutive second teeth, each of which is profiled to form the limiting surface 311. When the hinge assembly 100 moves between folding and opening, the second end of the synchronous swing arm 30 rotates around the connecting shaft 21, and in the rotating process, the first convex teeth and the second convex teeth are meshed with each other, so that stable hovering of the hinge assembly 100 at any folding position is realized.

According to one embodiment of the present invention, the hinge assembly 100 further includes: the first elastic member 60, the first elastic member 60 is sleeved on the connecting shaft 21, and one end of the first elastic member 60 is connected with the hinge bracket 20, and the other end of the first elastic member 60 is connected with one side of the matching member 50, which is opposite to the synchronous swing arm 30.

That is, as shown in fig. 1, the hinge assembly 100 may further include a first elastic member 60, the first elastic member 60 may be a spring column, the first elastic member 60 may be sleeved on the connection shaft 21, one end of the first elastic member 60 is connected to the hinge bracket 20, and the other end of the first elastic member 60 is connected to a side of the mating member 50 facing away from the synchronization swing arm 30. The first elastic member 60 can provide an elastic force to the mating member 50. When the hinge assembly 100 moves between folding and opening and closing, the second end of the synchronous swing arm 30 rotates around the connecting shaft 21, and in the rotating process, the first teeth and the second teeth are meshed with each other, and the synchronous swing arm 30 rotates around the connecting shaft 21 of the hinge bracket 20, so that the first elastic member 60 provides torque acting forces with different magnitudes for the middle frame bracket 10, which is more beneficial to stably hovering of the hinge assembly 100 at any folding position.

In some embodiments of the present invention, the side of the virtual swing arm 40 adjacent to the hinge bracket 20 is provided with a movable slot, and the hinge bracket 20 is pivotable with respect to the movable slot. The virtual swing arm 40 serves as a virtual swing arm of the hinge assembly 100, the virtual swing arm 40 does not move, the function of supporting the middle frame support 10 and the hinge support 20 is achieved, and the hinge support 20 can rotate around the virtual swing arm 40 in a fixed axis.

In summary, according to the hinge assembly 100 of the embodiment of the present invention, the middle frame support 10, the hinge support 20, the synchronous swing arm 30 and the virtual swing arm 40 form a movable hinge structure, wherein the second end of the synchronous swing arm 30 is provided with a plurality of limiting surfaces 311, the matching piece 50 is provided with a plurality of matching surfaces 51, and in the moving process of the hinge assembly 100, the preliminary hovering of the hinge assembly 100 at any folding position can be realized through the limiting cooperation of the limiting surfaces 311 and the matching surfaces 51.

Meanwhile, when the hinge bracket 20 moves to an unexpected hovering position relative to the center bracket 10, the magnetic attraction force is generated by electrifying the magnetic attraction assembly, so that the movement of the synchronous swing arm 30 or the matching piece 50 can be further limited, the hovering stability of the hinge assembly 100 is improved, the hinge assembly can resist certain external force action under the double effects of the limiting matching of the limiting surface 311 and the matching surface 51 and the magnetic attraction assembly, the hovering angle is kept unchanged, the folding hovering stability and reliability of the hinge assembly 100 are kept, and the user experience is improved.

According to a second aspect of the present invention, there is provided an electronic device comprising the hinge assembly 100 of the above-described embodiment. The electronic equipment can be folding products such as folding screen mobile phones or folding screen computers. Because the hinge assembly 100 of the embodiment of the present invention has the above technical effects, the electronic device according to the embodiment of the present invention should also have corresponding technical effects, that is, the electronic device of the present invention realizes stable hovering of the folding screen at any folding position by adopting the hinge assembly 100, and improves the user experience.

Of course, other structures of the electronic device and the working principle thereof are understood and can be implemented by those skilled in the art, and detailed description thereof is omitted herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A hinge assembly, comprising:

the middle frame support is internally provided with a cavity;

the hinge bracket is arranged opposite to the middle frame bracket at intervals;

the first end of the synchronous swing arm is movably arranged in the cavity, and the second end of the synchronous swing arm is movably connected with the hinge bracket; the second end of the synchronous swing arm is provided with a plurality of limiting surfaces;

the virtual swing arms are distributed at intervals with the synchronous swing arms, one end of each virtual swing arm is fixedly connected with the middle frame support, and the other end of each virtual swing arm is movably connected with the hinge support;

the matching piece is movably arranged on the hinge bracket and is provided with a plurality of matching surfaces corresponding to the limiting surfaces;

the magnetic component is arranged on the middle frame support or the hinge support, the magnetic component can be switched between an electrified state and a power-off state, a plurality of limiting surfaces can be respectively in limiting fit with a plurality of matching surfaces under the condition that the hinge support moves to different positions relative to the middle frame support, and when the magnetic component is in the electrified state, the magnetic component limits the synchronous swing arm or the matching piece to move.

2. The hinge assembly of claim 1, wherein the magnetic assembly comprises:

a first electromagnetic member disposed within the chamber;

the first magnetic attraction piece is arranged in the cavity and connected with the middle frame support, the first magnetic attraction piece corresponds to the first electromagnetic piece in position, the first end of the synchronous swing arm is positioned between the first magnetic attraction piece and the first electromagnetic piece, the first electromagnetic piece can be switched between a power-off state and a power-on state, and the first magnetic attraction piece and the first electromagnetic piece are separated under the condition that the first electromagnetic piece is in the power-off state; and under the condition that the first electromagnetic piece is in the electrified state, the first electromagnetic piece and the first magnetic piece are adsorbed, so that the limiting surface is tightly abutted against the matching surface.

3. The hinge assembly of claim 2, wherein the magnetic assembly further comprises:

the pressing plate is arranged in the cavity; the first electromagnetic piece is arranged on the pressing plate;

the second elastic piece is arranged in the cavity, the second elastic piece supports the pressing plate, and the first end of the synchronous swing arm is positioned between the pressing plate and the middle frame support; the pressing plate is switchable between a first position and a second position, the pressing plate and the first end of the synchronous swing arm are distributed at intervals when the first electromagnetic piece is in the power-off state, and the length of the second elastic piece is a first length; and under the condition that the first electromagnetic piece is in an electrified state, the pressing plate is in contact fixation with the synchronous swing arm, the length of the second elastic piece is a second length, and the first length is larger than the second length.

4. The hinge assembly of claim 3, wherein the magnetic assembly further comprises: the first circuit board is connected with the first electromagnetic piece, and the first circuit board controls the first electromagnetic piece to be switchable between a power-off state and a power-on state.

5. The hinge assembly of claim 1, wherein the mating piece further comprises a connection plate, the connection plate being connected to the hinge bracket; the magnetic assembly further comprises:

the second electromagnetic piece is arranged on the hinge bracket;

the second circuit board is connected with the second electromagnetic piece and is used for powering on or powering off the second electromagnetic piece;

the second magnetic attraction piece is arranged on the connecting plate, corresponds to the second electromagnetic piece, and repels each other under the condition that the second electromagnetic piece is electrified, so that the matching surface of the matching piece is tightly abutted to the limiting surface.

6. The hinge assembly of claim 1, wherein the hinge bracket comprises: the second end of the synchronous swing arm is sleeved on the connecting shaft in a pivotable manner, and the matching piece is sleeved on the connecting shaft and is movable in the axial direction of the connecting shaft.

7. The hinge assembly of claim 6, wherein the second end of the synchronization swing arm forms a first cam, a side of the first cam facing the mating member forms a plurality of first teeth, a profile of each of the first teeth forms the limit face, the mating member forms a second cam, a side of the second cam facing the first cam forms a plurality of second teeth, a profile of each of the second teeth forms the limit face.

8. The hinge assembly of claim 6, further comprising: the first elastic piece is sleeved on the connecting shaft, one end of the first elastic piece is connected with the hinge bracket, and the other end of the first elastic piece is connected with one side, back to the synchronous swing arm, of the matching piece.

9. The hinge assembly of claim 1, wherein a side of the virtual swing arm adjacent to the hinge bracket is provided with a movable slot, the hinge bracket being pivotable relative to the movable slot.

10. An electronic device comprising the hinge assembly of any one of claims 1-9.

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