WO2024125436A1 - Hinge mechanism and electronic device - Google Patents

Abstract

A hinge mechanism and an electronic device, which relate to the field of communication devices. In the hinge mechanism, a first rotating member (210) and a second rotating member (220) are respectively arranged on two opposite sides of a mounting base (110), and a first rotating arm (212) and a second rotating arm (222) of each rotating member are both in rotary fit with the mounting base (110) in a direction surrounding the lengthwise direction of the mounting base (110); the first rotating arm (212) is provided with a damping assembly (310), and an elastic member (311) abuts between the mounting base (110) and the first rotating arm (212); and a first abutting surface (214a) and a second abutting surface (214b) of the first rotating arm (212) are smoothly connected to each other, and the distance between the first abutting surface (214a) and a first end of the elastic member (311) is greater than the distance between the second abutting surface (214b) and the first end of the elastic member (311). When the hinge mechanism is in one of an unfolded state and a folded state, the first abutting surface (214a) is in abutting fit with the elastic member (311), and the elastic member (311) is in a natural state or in a compressed state; and when the hinge mechanism is in an intermediate state between the unfolded state and the folded state, the second abutting surface (214b) is in abutting fit with the elastic member (311).

Description

Hinge mechanism and electronic device

cross reference

The present invention claims the priority of the Chinese patent application filed with the China Patent Office on December 14, 2022, with application number 202211608013.8 and invention name “Hinge mechanism and electronic device”. The entire contents of the application are incorporated into the present invention by reference.

Technical Field

The present application belongs to the technical field of communication equipment, and specifically relates to a hinge mechanism and an electronic device.

Background technique

In order to take into account the characteristics of portability and large display area, foldable electronic devices are increasingly favored by consumers. In addition, in order to diversify the use scenarios of electronic devices, a damping mechanism is usually provided in foldable electronic devices so that the electronic devices have the ability to hover at a specific angle or infinitely. At present, the damping mechanism is usually an independent component. In the process of assembling the electronic device, the damping mechanism needs to be assembled separately, and then the assembled damping structure is assembled with other mechanisms in the electronic device. The damping mechanism has many parts. On the one hand, the damping mechanism occupies more space in the rotation axis of the electronic device. On the other hand, the damping mechanism is difficult to assemble.

Summary of the invention

The purpose of the embodiments of the present application is to provide a hinge mechanism and an electronic device to solve the problem that the damping mechanism in the current electronic device occupies a large space in the rotation axis of the electronic device and is difficult to assemble.

In a first aspect, an embodiment of the present application discloses a hinge mechanism, which includes a mounting seat, a first rotating member, a second rotating member and a damping assembly, wherein the first rotating member and the second rotating member are respectively arranged on opposite sides of the mounting seat, the first rotating member includes a first rotating arm, the second rotating member includes a second rotating arm, and the first rotating arm and the second rotating arm are both connected to the mounting seat. The cam is configured to engage with the first end of the elastic member and to engage with the second end of the elastic member in a direction around the length direction of the mounting seat; the damping assembly includes an elastic member, the elastic direction of the elastic member includes a component along the length direction, the first rotating arm is equipped with the damping assembly, the first end of the elastic member abuts against the mounting seat, and the second end of the elastic member is used to abut and cooperate with the first rotating arm; the end surface of the first rotating arm facing the elastic member includes a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface of the first rotating arm are smoothly connected, and the distance between the first abutting surface and the first end of the elastic member is greater than the distance between the second abutting surface and the first end of the elastic member; when the hinge mechanism is in one of the unfolded state and the folded state, the first abutting surface abuts and cooperates with the elastic member, and the elastic member is in a natural state or a compressed state, and when the hinge mechanism is in a critical state between the unfolded state and the folded state, the second abutting surface abuts and cooperates with the elastic member.

In a second aspect, an embodiment of the present application discloses an electronic device, which includes a first screen support portion, a second screen support portion, a display screen and the above-mentioned hinge mechanism, wherein the first screen support portion is fixedly connected to the first rotating member, the second screen support portion is fixedly connected to the second rotating member, and the display screen is supported by the first screen support portion and the second screen support portion.

The embodiment of the present application discloses a hinge mechanism, which includes a mounting seat, a first rotating member, a second rotating member and a damping assembly, wherein the first rotating arm of the first rotating member and the second rotating arm of the second rotating member are both rotatably matched with the mounting seat. The damping assembly includes an elastic member, the first rotating arm is equipped with the damping assembly, and the end surface of the elastic member of the first rotating arm facing the damping assembly includes a first abutting surface and a second abutting surface, when the hinge mechanism is in an unfolded state or a folded state, the first abutting surface abuts against the elastic member, and the elastic member is in a natural state or a compressed state, and when the hinge mechanism is in a critical state between the unfolded state and the folded state, the second abutting surface abuts against the elastic member; at the same time, since the spacing between the first abutting surface and the first end of the elastic member away from the first rotating arm is greater than the spacing between the second abutting surface and the first end of the elastic member, when the elastic member switches from cooperating with the first abutting surface to cooperating with the second abutting surface, the elastic member can be further compressed, ensuring that the elastic member can apply an elastic extrusion force to the second abutting surface, thereby limiting the rotation of the first rotating arm relative to the mounting seat, and then, in the absence of other external forces, the first rotating arm can be in a suspended state relative to the mounting seat. In addition, through By expanding the span range of the second abutting surface, the first rotating arm has relatively more optional values of the hovering angle, thereby expanding the use scenarios of electronic devices using the hinge mechanism.

As mentioned above, the damping assembly disclosed in the embodiment of the present application cooperates with the rotating arm (specifically the first rotating arm) that is originally required to be set in the hinge mechanism, which can reduce the number of components that the damping assembly itself needs to include, thereby reducing the difficulty of assembling the damping assembly, and can reduce the size occupied by the damping assembly in the rotation axis direction of the electronic device, thereby expanding the installation space of the hinge mechanism.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

FIG1 is a schematic structural diagram of a hinge mechanism disclosed in an embodiment of the present application;

FIG2 is a schematic diagram of the hinge mechanism shown in FIG1 in another direction;

FIG3 is an exploded schematic diagram of a part of the structure of the hinge mechanism shown in FIG1 ;

FIG4 is a schematic structural diagram of a mounting seat in a hinge mechanism disclosed in an embodiment of the present application;

5 is a schematic structural diagram of a first rotating member and a second rotating member in a hinge mechanism disclosed in an embodiment of the present application;

6 and 7 are schematic diagrams of assembly between the first rotating member and the second rotating member and the mounting seat in the hinge mechanism disclosed in the embodiment of the present application;

8 and 9 are schematic diagrams of the principle of the damping assembly in the hinge mechanism disclosed in the embodiment of the present application;

10 and 11 are schematic diagrams of the principles of the synchronizer in the hinge mechanism disclosed in the embodiment of the present application.

Description of reference numerals:
110-mounting seat, 111-first accommodating groove, 120-synchronizing member, 121-first limiting groove, 122-second limiting groove, 140-first arc-shaped matching portion, 201-second arc-shaped matching portion, 210-first rotating member, 211-first connecting portion, 212-first rotating arm, 213-first driving arm, 214a-first abutting surface, 214b-second abutting surface, 214c-third abutting surface, 220-second rotating member, 221-second connecting portion, 222-second rotating arm, 223-second driving arm, 310-damping assembly, 311-elastic member, 312-cam, 320-bridge Connecting piece, 410 - first supporting portion, 420 - second supporting portion.

Detailed ways

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

The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and/or" in the specification and claims represents at least one of the connected objects, and the character "/" generally indicates that the objects associated with each other are in an "or" relationship.

As shown in Figures 1 to 11, an embodiment of the present application discloses a hinge mechanism, which can cooperate with a flexible screen to form a foldable electronic device. This electronic device has a folded state and an unfolded state. The folded state is a state in which the two main parts of the flexible screen in the electronic device are parallel to each other and arranged relative to each other. The unfolded state is a state in which the flexible screen in the electronic device has a complete display surface, that is, the display surfaces of the two main parts are arranged coplanarly. To this end, when the electronic device is in a folded state, the overall size of the electronic device in all directions is relatively small, thereby making the electronic device more portable; when the electronic device is in an unfolded state, the display screen of the electronic device has a larger display area, which can provide a better viewing experience for the user.

Of course, in order to ensure that the flexible screen can form a stable assembly relationship with the hinge mechanism, the hinge mechanism is usually also equipped with a screen support. Specifically, screen supports (not shown in the figure) can be provided on both opposite sides of the hinge mechanism, and the display screen can be fixed on the screen support so that the screen support can provide support for the display screen, and when the two adjacent screen support parts rotate relative to each other, the display screen can be driven to produce a corresponding folding or unfolding action.

The hinge mechanism includes a mounting assembly, a first rotating member 210, a second rotating member 220 and a damping assembly 310, wherein the mounting assembly is a basic structural component in the hinge mechanism, which can provide mounting functions for components such as the first rotating member 210, the second rotating member 220 and the damping assembly 310. The mounting assembly may specifically include a mounting seat 110. Of course, the mounting assembly may also include other structures such as the synchronizing member 120 mentioned below, which will not be described in detail here. The structures of the first rotating member 210 and the second rotating member 220 may be different. In another embodiment of the present application, the structures of the first rotating member 210 and the second rotating member 220 are symmetrically arranged to enhance the connection effect between the hinge mechanism and the screen support parts on opposite sides thereof, so that the rotational movements of the two screen support parts and the hinge mechanism correspond to each other, thereby enhancing the accuracy of the electronic device.

Accordingly, in order to ensure that the hinge mechanism can form an assembly relationship with the screen support parts arranged on the opposite sides thereof, the first rotating member 210 and the second rotating member 220 in the hinge mechanism are respectively arranged on the opposite sides of the mounting seat 110 in the mounting assembly, so that the mounting seat 110 can be connected to the two aforementioned screen support parts by using the first rotating member 210 and the second rotating member 220. Specifically, the first rotating member 210 and the screen support part, as well as the second rotating member 220 and the screen support part, can form a fixed connection relationship by welding or the like; in another embodiment of the present application, the first rotating member 210 and the second rotating member 220 can each form a detachable fixed connection relationship with the screen support part by a threaded connector, so as to facilitate later maintenance and care.

In addition, it should be noted that the above-mentioned positional relationship between the first rotating member 210 and the second rotating member 220 and the mounting base 110 is described based on the example that the hinge mechanism is in the unfolded state. If the hinge mechanism is in the folded state, the first rotating member 210 and the second rotating member 220 can both rotate relative to the mounting base 110 to the same surface of the mounting base 110.

The first rotating member 210 includes a first rotating arm 212, and the second rotating member 220 includes a second rotating arm 222. During the assembly of the hinge mechanism, the first rotating member 210 is rotationally matched with the mounting base 110 through its first rotating arm 212, and the second rotating member 220 is rotationally matched with the mounting base 110 through its second rotating arm 222, so that the first rotating member 210 and the second rotating member 220 can both be rotationally matched with the mounting base 110 along the length direction of the mounting base 110 (i.e., the direction around the rotation axis of the hinge mechanism).

Specifically, taking the first rotating arm 212 as an example, an arc-shaped groove can be provided on the mounting seat 110, and the first rotating arm 212 can be installed in the aforementioned arc-shaped groove, so that the first rotating arm 212 can move in the arc-shaped groove, so that the first rotating arm 212 and the mounting seat 110 can form a rotational matching relationship; conversely, by providing an arc-shaped protrusion on the mounting seat 110 and an arc-shaped groove on the first rotating arm 212, the first rotating arm 212 and the mounting seat 110 can also form a rotational matching relationship. Of course, the first rotating arm 212 and the mounting seat 110 can also be connected to each other and form a rotational matching relationship using other forms of structures, which will not be introduced here for the sake of brevity; in addition, the second rotating arm 222 and the mounting seat 110 can also refer to the structural form of the above-mentioned first rotating arm 212, so that the second rotating arm 222 can form a rotational matching relationship with the mounting seat 110.

In order to facilitate the first rotating member 210 and the second rotating member 220 to be connected to their respective corresponding screen support parts, the first rotating member 210 can also include a first connecting part 211, and the first rotating arm 212 is fixed to the first connecting part 211. The second rotating member 220 can also include a second connecting part 221, and the second rotating arm 222 is fixed to the second connecting part 221. The first connecting part 211 and the second connecting part 221 are both used to be fixedly connected to the above-mentioned screen support parts respectively, so that the first rotating member 210 and the second rotating member 220 can both form a rotational connection relationship with the mounting base 110.

The damping assembly 310 is a device for providing damping in the hinge mechanism disclosed in the embodiment of the present application, and includes an elastic member 311. The elastic direction of the elastic member 311 includes a component along the length direction of the mounting seat 110, that is, the elastic member 311 can provide an elastic force along the length direction of the mounting seat 110, so as to utilize the elastic force provided by the elastic member 311 to enable the mechanism matched with the damping assembly 310 to have a hovering capability. The length direction of the mounting seat 110 is the rotation axis of the hinge mechanism.

Optionally, the first rotating arm 212 is provided with a damping assembly 310, that is, in the embodiment of the present application, by providing the first rotating arm 212 with a damping assembly 310, the first rotating arm 212 and the screen support portion connected to the first rotating arm 212 have the ability to suspend relative to the mounting seat 110. Specifically, the first end of the elastic member 311 abuts against the mounting seat 110, and the second end of the elastic member 311 is used to abut against the first rotating arm 212, so that when the elastic member 311 is compressed, the elastic effect of the elastic member 311 can be used to limit the first rotating arm 212 from rotating relative to the mounting seat 110.

In order to ensure that the first rotating arm 212 can apply a squeezing force to the elastic member 311, the first rotating arm 212 The end surface of the arm 212 facing the elastic member 311 includes a first abutting surface 214a and a second abutting surface 214b, and the first abutting surface 214a and the second abutting surface 214b of the first rotating arm 212 are smoothly connected to ensure that the elastic member 311 or the intermediate member between the elastic member 311 and the first rotating arm 212 (such as the cam 312 mentioned below) can stably and conveniently switch between the first abutting surface 214a and the second abutting surface 214b. At the same time, on the first rotating arm 212, the distance between the first abutting surface 214a and the first end of the elastic member 311 is greater than the distance between the second abutting surface 214b and the first end of the elastic member 311. That is, when the elastic member 311 switches from cooperating with the first abutting surface 214a to cooperating with the second abutting surface 214b, the elastic member 311 will be compressed, so that the size of the elastic member 311 is reduced.

Based on the above technical content, when the hinge mechanism is in one of the unfolded state and the folded state, the first abutment surface 214a abuts against the elastic member 311, and the elastic member 311 is in a natural state or a compressed state. In this case, it can be ensured that the elastic member 311 is clamped relatively stably between the first rotating arm 212 and the mounting seat 110, and if the elastic member 311 is in a compressed state, the hinge mechanism can also be maintained in one of the unfolded state and the folded state without being disturbed by external forces. At the same time, when the hinge mechanism is in a critical state between the unfolded state and the folded state, the second abutting surface 214b abuts against the elastic member 311. As described above, relative to the first abutting surface 214a, the second abutting surface 214b is closer to the first end of the elastic member 311, so that the elastic member 311 can be further compressed, so that the elastic member 311 has a certain elastic potential energy, and under the action of the elastic member 311 to restore its own deformation, the first rotating arm 212 can enter a suspended state without being affected by external forces, that is, the first rotating arm 212 can no longer rotate relative to the mounting seat 110 without being affected by external forces. In addition, when the elastic member 311 cooperates with the second abutting surface 214b, the degree of compression of the elastic member 311 can also be changed by controlling the specific size of the second abutting surface 214b, which is not limited here.

Specifically, the extension angles of the first abutting surface 214a and the second abutting surface 214b can be determined accordingly according to actual needs, so that the hovering angle range of the hinge mechanism can also be adjusted accordingly. In detail, in the direction around the length direction of the mounting seat 110, when the angle spanned by the second abutting surface 214b is relatively large, the hovering angle range of the hinge mechanism is also relatively large. Correspondingly, when the angle spanned by the second abutting surface 214b is relatively small, the hovering angle range of the hinge mechanism is also relatively small. This is not limited in this article, and those skilled in the art can adjust the hovering angle range according to actual needs. Of course, taking the rotation angle of the first rotating arm 212 relative to the mounting seat 110 as 90° as an example, in view of the smooth transition between the first abutting surface 214a and the second abutting surface 214b, the smooth transition surface between the two will inevitably occupy a certain angle in the direction around the length direction of the mounting seat 110, and the elastic member 311 is basically unable to stably hover on the aforementioned smooth transition surface. For this reason, it should be noted that in the hinge mechanism disclosed in the embodiment of the present application, the hovering range of the first rotating arm 212 is less than 90°.

The embodiment of the present application discloses a hinge mechanism, which includes a mounting seat 110, a first rotating member 210, a second rotating member 220 and a damping assembly 310. The first rotating arm 212 of the first rotating member 210 and the second rotating arm 222 of the second rotating member 220 are both rotatably matched with the mounting seat 110. The damping assembly 310 includes an elastic member 311. The first rotating arm 212 is equipped with the damping assembly 310, and the end surface of the elastic member 311 of the first rotating arm 212 facing the damping assembly 310 includes a first abutting surface 214a and a second abutting surface 214b. When the hinge mechanism is in an unfolded state or a folded state, the first abutting surface 214a abuts against the elastic member 311, and the elastic member 311 is in a natural state or a compressed state. When the hinge mechanism is in a critical state between the unfolded state and the folded state, the second abutting surface 214b abuts against the elastic member 311. At the same time, due to the first abutting surface 2 The distance between the first end of the elastic member 311 away from the first rotating arm 212 is greater than the distance between the second abutting surface 214b and the first end of the elastic member 311, so that when the elastic member 311 switches from cooperating with the first abutting surface 214a to cooperating with the second abutting surface 214b, the elastic member 311 can be further compressed, ensuring that the elastic member 311 can apply an elastic extrusion force to the second abutting surface 214b, thereby limiting the rotation of the first rotating arm 212 relative to the mounting seat 110, and then, in the absence of other external forces, the first rotating arm 212 can be in a hovering state relative to the mounting seat 110. In addition, by expanding the span range of the second abutting surface 214b, the selection values of the hovering angle of the first rotating arm 212 are relatively more, expanding the use scenarios of electronic devices using the above hinge mechanism.

As described above, the damping assembly 310 disclosed in the embodiment of the present application cooperates with the rotating arm (specifically the first rotating arm 212) that is originally required to be provided in the hinge mechanism, which can reduce the number of components required to be included in the damping assembly 310 itself, thereby reducing the difficulty of assembling the damping assembly 310, and can reduce the size occupied by the damping assembly 310 in the rotation axis of the electronic device, thereby expanding the hinge mechanism. installation space.

In order to further improve the structural performance of the hinge mechanism, optionally, the end surface of the first rotating arm 212 facing the elastic member 311 further includes a third abutting surface 214c, and the third abutting surface 214c is smoothly connected to the side of the second abutting surface 214b away from the first abutting surface 214a, and the distance between the third abutting surface 214c and the first end of the elastic member 311 is greater than the distance between the second abutting surface 214b and the first end of the elastic member 311. Intuitively speaking, relative to the first abutting surface 214a and the third abutting surface 214c, the second abutting surface 214b is protrudingly arranged, so that when the elastic member 311 cooperates with the second abutting surface 214b, it is ensured that the elastic member 311 has a relatively large elastic reset force, so as to improve the reliability of the hovering effect provided by the elastic member 311.

At the same time, when the hinge mechanism is in the other of the unfolded state and the folded state, the third abutting surface 214c abuts against the elastic member 311, and the elastic member 311 is in a natural state or a compressed state. Optionally, when the hinge mechanism is in the unfolded state, the first abutting surface 214a abuts against the elastic member 311, and when the hinge mechanism is in the folded state, the third abutting surface 214c abuts against the elastic member 311. Moreover, when the hinge mechanism is in the unfolded state and the folded state, by making the elastic member 311 further in a compressed state, the hinge mechanism can be ensured to be maintained in the folded state and the unfolded state without being acted upon by external forces, which can further improve the convenience of use of the electronic device using the above-mentioned hinge mechanism, thereby improving the user experience of the electronic device.

In addition, as described above, compared with the first abutting surface 214a and the third abutting surface 214c, the second abutting surface 214b is protruding, and since there is a smooth transition between the first abutting surface 214a and the second abutting surface 214b, and between the third abutting surface 214c and the second abutting surface 214b, when the elastic member 311 switches from cooperating with the second abutting surface 214b to cooperating with the first abutting surface 214a (and the third abutting surface 214c), under the elastic action of the elastic member 311, the elastic member 311 can "automatically" move from the edge of the second abutting surface 214b to the first abutting surface 214a (and the third abutting surface 214c), so that the electronic device using the above-mentioned hinge mechanism has the ability to "automatically fully fold" after folding to a preset angle and "automatically fully unfold" after unfolding to a preset angle, which facilitates the folding and unfolding of the electronic device, improves the user experience, and can also prevent the electronic device from being over-expanded and over-folded, thereby increasing the service life of the electronic device.

Of course, in order to improve the smoothness of the relative movement between the first rotating arm 212 and the corresponding elastic member 311, optionally, in the hinge mechanism disclosed in the embodiment of the present application, the damping assembly 310 may also include a cam 312, and the cam 312 abuts against the second end of the elastic member 311, and the cam 312 is in point contact or line contact with the end surface of the first rotating arm 212 facing the elastic member 311. That is, in the embodiment of the present application, the elastic member 311 corresponding to the first rotating arm 212 is movably connected to the first rotating arm 212 through the cam 312, and by making the cam 312 and the first rotating arm 212 adopt a point contact or line contact mode, the contact area between the cam 312 and the first rotating arm 212 is reduced, and the contact area between the cam 312 and the first rotating arm 212 is reduced, thereby improving the smoothness of the movement between the two.

Specifically, the cam 312 and the elastic member 311 can be connected to each other in a nested manner, or the second end of the elastic member 311 can be fixed to the end surface of the cam 312 away from the first rotating arm 212 by bonding or the like. The end of the cam 312 facing the first rotating arm 212 is provided with a spherical surface to form a point contact matching state with the first rotating arm 212, or the end of the cam 312 facing the first rotating arm 212 is provided with a cylindrical side surface structure to form a line contact matching relationship between the cam 312 and the first rotating arm 212.

As described above, the elastic direction of the elastic member 311 has a component along the length direction of the mounting base 110. Optionally, the elastic direction of the elastic member 311 is parallel to the length direction of the mounting base 110. On the one hand, it is convenient for the installation of the elastic member 311, and on the other hand, it can also maximize the effectiveness of the elastic force of the elastic member 311.

As described above, the first rotating arm 212 may be provided with a damping assembly 310. In another embodiment of the present application, the second rotating arm 222 may also be provided with a damping assembly 310. Then, under the action of the damping assembly 310 corresponding to the second rotating arm 222, the second rotating arm 222 may also have the ability to hover relative to the mounting base 110. Based on this, in the embodiment of the present application, there are multiple damping assemblies 310, and among the multiple damping assemblies 310, the second end of the elastic member 311 of at least one damping assembly 310 is used to abut against the first rotating arm 212, and the second end of the elastic member 311 of at least another damping assembly 310 is used to abut against the second rotating arm 222, thereby ensuring that the first rotating arm 212 and the second rotating arm 222 are both provided with a damping assembly 310. Of course, in the hinge mechanism, the number of the first rotating member 210 and the second rotating member 220 may also be multiple. In this case, any one of the first rotating members 210 and the second rotating member 220 may be provided with a damping assembly 310. A rotating member 210 and any second rotating member 220 are each individually provided with a damping assembly 310, or one or more of the plurality of first rotating members 210 and one or more of the plurality of second rotating members 220 are each individually provided with a damping assembly 310, which is not limited in this article.

Correspondingly, in order to ensure that the damping assembly 310 cooperating with the second rotating arm 222 can provide a damping effect for the second rotating arm 222, it is also necessary to impose corresponding restrictions on the structure of the second rotating arm 222. Specifically, similar to the first rotating arm 212, the end surface of the second rotating arm 222 facing the corresponding elastic member 311 can also include a first abutting surface 214a and a second abutting surface 214b. That is, the structure of the second rotating arm 222 is the same as or similar to that of the first rotating arm 212, so as to ensure that when the elastic member 311 switches from cooperating with the first abutting surface 214a of the second rotating arm 222 to cooperating with the second abutting surface 214b of the second rotating arm 222, the elastic member 311 can be squeezed by the second rotating arm 222, so as to ensure that the elastic member 311 is in a compressed state when cooperating with the second abutting surface 214b of the second rotating arm 222, and then the elastic effect of the elastic member 311 is utilized to enable the second rotating arm 222 to have the ability to hover relative to the mounting base 110. Similarly, the specific structure and parameters of the first abutting surface 214a and the second abutting surface 214b in the second rotating arm 222 can all refer to the corresponding design of the first abutting surface 214a and the second abutting surface 214b in the first rotating arm 212, and the second rotating arm 222 can also include a third abutting surface 214c smoothly connected to the side of the second abutting surface 214b away from the first abutting surface 214a, so that the display screen corresponding to the second rotating arm 222 also has the ability to automatically fold into place and automatically unfold into place, further improving the usability of the electronic device.

In the case where the first rotating arm 212 and the second rotating arm 222 are both equipped with a damping assembly 310, in order to make the inclination angles of (parts of) the display screens corresponding to the first rotating arm 212 and the second rotating arm 222 relative to the mounting base 110 substantially the same, thereby improving the user's viewing experience, optionally, in the hinge mechanism disclosed in the embodiment of the present application, the mounting assembly further includes a synchronizing member 120. As described above, the first rotating member 210 and the second rotating member 220 are respectively disposed on opposite sides of the mounting assembly. In the case where the mounting assembly includes the mounting base 110, the first rotating member 210 and the second rotating member 220 can be respectively disposed on opposite sides of the mounting base 110. Based on this, the synchronizing member 120 is located on a side of the mounting base 110 adjacent to the first rotating member 210 and the second rotating member 220. In detail, the mounting base 110 has a first side and a second side that are opposite to each other, and the mounting base 110 also has a first surface and a second surface that are opposite to each other, and the first surface, the first surface, and the second surface are disposed on opposite sides of the mounting base 110. The four spaces of the first side, the second side and the second side are distributed in sequence along the direction of the rotation axis around the hinge mechanism, that is, the first side is located on one side of the first side and the second side, the second side is located on the other side of the first side and the second side, the first side is adjacent to the first side and the second side, and the second side is also adjacent to the first side and the second side, wherein the first rotating member 210 is located on the first side of the mounting seat 110, the second rotating member 220 is located on the second side of the mounting seat 110, and the synchronous member 120 is located on the first side of the mounting seat 110.

Furthermore, in order to ensure that the synchronizer 120 can provide a synchronization effect, the synchronizer 120 and the mounting seat 110 are flexibly matched in the length direction of the mounting seat 110, so that the synchronizer 120 can be used to make the first rotating member 210 and the second rotating member 220 synchronously rotate relative to the mounting seat 110. As described above, the synchronizer 120 is arranged on one side of the mounting seat 110, and since the mounting seat 110 and the synchronizer 120 are flexibly matched in the length direction of the mounting seat 110, in order to ensure that the synchronizer 120 can form a reliable matching relationship with the mounting seat 110, a sliding connection member can be arranged between the two, and the synchronizer 120 and the mounting seat 110 are mutually limited with the sliding connection member in a direction perpendicular to the mounting seat 110. Among them, the direction perpendicular to the mounting seat 110 can specifically be the thickness direction of the mounting seat 110, or it can be the distribution direction between the mounting seat 110 and the synchronizer 120.

As shown in Fig. 10 and Fig. 11, the synchronizer 120 is provided with a first limiting groove 121 and a second limiting groove 122, the first rotating part further includes a first driving arm 213, and the second rotating part further includes a second driving arm 223. The first rotating arm 212 and the first driving arm 213 are both connected to the first connecting part 211, and the first rotating arm 212 and the first driving arm 213 are both located on the same side of the first connecting part 211, so that when the first rotating arm 212 rotates relative to the mounting seat 110, the first driving arm 213 can be driven to rotate relative to the mounting seat 110. The second rotating arm 222 and the second driving arm 223 are both connected to the second connecting part 221, and the second rotating arm 222 and the second driving arm 223 are both located on the same side of the second connecting part 221, so that when the second rotating arm 222 rotates relative to the mounting seat 110, the second driving arm 223 can be driven to rotate relative to the mounting seat 110.

As described above, the first driving arm 213 is a component of the first rotating member 210, and the second driving arm 223 is a component of the second rotating member 220. The first rotating member 210 and the second rotating member 220 are respectively rotatably mounted on the mounting seat 110, and the first rotating member 210 and the second rotating member 220 are respectively connected to the screen support parts on the opposite sides of the hinge mechanism. In the folding and unfolding process of the electronic device, the mounting seat 110 is used to support the screen. As a reference system, the screen support parts on opposite sides of the hinge mechanism rotate in opposite directions. Correspondingly, the first rotating member 210 and the second rotating member 220 respectively fixedly connected to the two screen support parts rotate in opposite directions.

Based on the above, in the hinge mechanism disclosed in the embodiment of the present application, in order to ensure that the first rotating member 210 and the second rotating member 220 can have the function of synchronous rotation, the first driving arm 213 and the second driving arm 223 both extend around the length direction of the mounting seat 110, and the rotation directions of the two are opposite, that is, the first driving arm 213 and the second driving arm 223 both include a spiral structure, which ensures that the two can convert rotational motion into linear motion; at the same time, the first driving arm 213 is slidably matched with the first limiting groove 121 of the synchronous member 120, and the second driving arm 223 is slidably matched with the second limiting groove 121 of the synchronous member 120 The limiting groove 122 is slidably engaged, and then, when the first rotating member 210 rotates relative to the mounting seat 110 along the first rotational direction, the first driving arm 213 spirally engaged with the first limiting groove 121 can drive the synchronous member 120 to move relative to the mounting seat 110 along the length direction of the mounting seat 110. That is, by utilizing the spirally extended first driving arm 213, the rotational driving force of the first rotating member 210 can be converted into a linear driving force. Under the action of the linear driving force, the synchronous member 120 can be driven to move relative to the mounting seat 110 along the axial direction of the spiral, that is, the length direction of the mounting seat 110.

Subsequently, since the synchronizer 120 also cooperates with the second driving arm 223 through its second limiting groove 122, a linear force will be applied to the second driving arm 223 during the linear motion of the synchronizer 120 relative to the mounting base 110. Since the second driving arm 223 is a spiral structure, the synchronizer 120 can drive the second driving arm 223 to rotate relative to the mounting base 110, thereby driving the entire second rotating member 220 to rotate relative to the mounting base 110; at the same time, since the spiral direction of the second driving arm 223 is opposite to the spiral direction of the first driving arm 213, the synchronizer 120 can drive the second driving arm 223 to rotate relative to the mounting base 110 along a second rotation direction opposite to the first rotation direction, thereby ensuring that the first rotating member 210 and the second rotating member 220 can rotate synchronously and make the rotation directions of the two opposite.

Specifically, the specific parameters of the first driving arm 213 and the second driving arm 223 of the spiral structure can be determined according to actual conditions and are not limited here. In addition, the first connecting portion 211, the first rotating arm 212 and the first driving arm 213 can be formed separately using hard materials such as metal and connected as a whole by welding or thermal fusion; or, they can be formed as a whole by an integrated molding method. The first rotating member 210 includes a first connecting portion 211, a first rotating arm 212 and a first driving arm 213. Similarly, the formation method of the second rotating member 220 can refer to the first rotating member 210, and will not be repeated here. In addition, the first limiting groove 121 and the second limiting groove 122 can be formed on one side surface of the synchronous member 120 by etching or the like. Of course, the synchronous member 120 having the first limiting groove 121 and the second limiting groove 122 can also be directly formed by an integral molding method. The first limiting groove 121 and the second limiting groove 122 can both be linear grooves, and the width and length of the two can be determined according to the specific dimensions of the first driving arm 213 and the second driving arm 223, respectively, and are not limited here.

As described above, when the first rotating member 210 and the second rotating member 220 are both equipped with the damping assembly 310, and the first rotating member 210 and the second rotating member 220 form a synchronous rotation assembly relationship through the synchronous member 120, when one of the first rotating member 210 and the second rotating member 220 rotates relative to the mounting seat 110 and squeezes the damping assembly 310, the other of the two can be driven to rotate relative to the mounting seat 110 and squeeze the corresponding damping assembly 310, ensuring that the first rotating member 210 and the second rotating member 220 can both form a hovering matching relationship with the mounting seat 110.

In order to further improve the movement stability and consistency of the damping assembly 310 respectively cooperating with the first rotating member 210 and the second rotating member 220, optionally, the hinge mechanism disclosed in the embodiment of the present application further includes a bridging member 320, and the cams 312 of the two respective damping assemblies 310 respectively cooperating with the first rotating member 210 and the second rotating member 220 in the plurality of damping assemblies 310 are fixed to the bridging member 320. In this case, when one of the first rotating member 210 and the second rotating member 220 rotates relative to the mounting base 110, the damping assemblies 310 respectively cooperating with the first rotating member 210 and the second rotating member 220 can be driven to move together, and when the user or the driving member Under the action of the driving force provided, the elastic members 311 in the two damping assemblies 310 are directly squeezed. In this case, when the synchronizer 120 acts to indirectly drive the other of the first rotating member 210 and the second rotating member 220 to rotate relative to the mounting seat 110, since the damping assembly 310 corresponding to the other of the first rotating member 210 and the second rotating member 220 has been driven and has been squeezed, when the synchronizer 120 drives the other of the first rotating member 210 and the second rotating member 220 to rotate relative to the mounting seat 110, the force strength of the synchronizer 120 can also be reduced, thereby improving the structural reliability and service life of the synchronizer 120.

Specifically, the damping corresponding to the first rotating member 210 and the second rotating member 220 may be The installation position of the assembly 310 in the mounting seat 110 and other parameters correspondingly determine the fixed position of the cams 312 in the two damping assemblies 310 on the bridge member 320, thereby ensuring that each damping assembly 310 can reliably provide a damping effect. In addition, as for the matching relationship between each damping assembly 310 and the mounting seat 110, the damping assembly 310 can be specifically assembled with the first rotating member 210 (or the second rotating member 220) to ensure that the damping assembly 310 can only move relative to the mounting seat 110 in the elastic direction of the elastic member 311, thereby improving the reliability of the damping assembly 310.

In another embodiment of the present application, the mounting seat 110 may be provided with a limiting groove, so that the bridge member 320 and the limiting groove can be movably matched in the elastic direction of the elastic member 311, and the bridge member 320 and the limiting groove can be limited in the direction perpendicular to the elastic direction of the elastic member 311, which can also ensure that each damping assembly 310 can form a good assembly relationship with the mounting seat 110. Specifically, the limiting groove can provide the bridge member 320 with limiting effects in two mutually perpendicular directions, thereby ensuring that the bridge member 320 and the limiting groove can be limited in the direction perpendicular to the elastic direction of the elastic member 311.

As described above, the mounting seat 110 may be provided with an arc-shaped groove, and the first rotating arm 212 is extended into the arc-shaped groove, so that the first rotating arm 212 and the mounting seat 110 form a rotational matching relationship. In another embodiment of the present application, as shown in FIG4 , the mounting seat 110 is provided with a first receiving groove 111, and one of the two side walls of the first receiving groove 111 opposite to each other along the length direction of the mounting seat 110 is provided with a first arc-shaped matching portion 140, and one side of the first rotating arm 212 is provided with a second arc-shaped matching portion 201, and the second arc-shaped matching portion 201 is rotationally matched with the first arc-shaped matching portion 140 of the first receiving groove 111, and one of the first arc-shaped matching portion 140 and the second arc-shaped matching portion 201 is an arc-shaped recessed groove, and the other is an arc-shaped protrusion, so that the first rotating arm 212 can form a rotational matching relationship with the mounting seat 110.

In the case of adopting the above technical solution, the first rotating arm 212 and the mounting seat 110 can be limited to each other in the length direction of the mounting seat 110 by the restriction of the first receiving groove 111 on the mounting seat 110, and the first rotating arm 212 and the second rotating arm 222 can be limited to each other in the direction perpendicular to the length direction of the mounting seat 110 by the interaction of the first arc-shaped matching portion 140 and the second arc-shaped matching portion 201; and the first rotating arm 212 and the first receiving groove 111 that cooperate with each other, as well as the first arc-shaped matching portion 140 and the second arc-shaped matching portion 201 that cooperate with each other can provide a guarantee for the rotational matching relationship between the first rotating arm 212 and the mounting seat 110, so that the first rotating arm 212 and The rotational matching relationship between the mounting seats 110 is more stable and reliable.

In order to improve the overall structural strength of the mounting seat 110, the first arc-shaped matching portion 140 provided on the side wall of the first receiving groove 111 can be an arc-shaped protrusion, and the second arc-shaped matching portion 201 provided on the side of the first rotating arm 212 can be an arc-shaped recessed groove, and the structures and sizes of the arc-shaped protrusion and the arc-shaped recessed groove correspond to each other to ensure that the two can be in a rotational matching relationship. In addition, in the case where the first rotating arm 212 is equipped with a damping assembly 310, the side surface of the first rotating arm 212 opposite to the second arc-shaped matching portion can be used to match the damping assembly 310, and under the action of the elastic member 311 in the damping assembly 310, the first rotating arm 212 can also be provided with a driving function to move in the direction close to the first arc-shaped matching portion 140 on the mounting seat 110, so as to further improve the matching stability between the second arc-shaped matching portion 201 on the first rotating arm 212 and the corresponding first arc-shaped matching portion 140 on the mounting seat 110.

Similarly, the first receiving groove 111 may also be provided at the position corresponding to the second rotating arm 222 in the mounting seat 110, and the first arc-shaped matching portion 140 may be provided on the side wall of the first receiving groove 111. Accordingly, by providing the second arc-shaped matching portion 201 on the second rotating arm 222, the second rotating arm 222 may also form a stable and reliable rotating matching relationship with the mounting seat 110. Correspondingly, when the second rotating arm 222 is also provided with the damping assembly 310, the matching stability between the second arc-shaped matching portion 201 of the second rotating arm 222 and the corresponding first arc-shaped matching portion 140 on the mounting seat 110 may also be correspondingly improved.

As described above, the first rotating member 210 includes a first driving arm 213, and the second rotating member 220 includes a second driving arm 223, and the first driving arm 213 and the second driving arm 223 both cooperate with the synchronous member 120, and the synchronous member 120 is arranged on a side of the mounting seat 110 adjacent to the first rotating member 210 and the second rotating member 220. In order to minimize the processing difficulty of the mounting seat 110, the first receiving groove 111 can be arranged through the mounting seat 110, so that a part of the first driving arm 213 can pass through the first receiving groove 111 and extend into the first limiting groove 121 of the synchronous member 120, so that the first driving arm 213 can form a reliable matching relationship with the synchronous member 120. When the above technical solution is adopted, the same groove structure (i.e., the first receiving groove 111) on the mounting seat 110 can cooperate with the first driving arm 213 and the first rotating arm 212 at the same time, while ensuring that the mounting seat 110 has a relatively long size to have a wider installation capacity, The mounting base 110 can also be made lighter, thereby improving the overall performance of the mounting base 110 .

Correspondingly, another first accommodating groove 111 in the mounting seat 110 for cooperating with the second rotating member 220 can also be a through-type structure, so that the second rotating arm 222 and the second driving arm 223 of the second rotating member 220 can be installed in the other first accommodating groove 111 of the mounting seat 110 together, and a part of the second driving arm 223 can also pass through the first accommodating groove 111 and cooperate with the second limiting groove 122 of the synchronous member 120, so that the second rotating member 220 and the synchronous member 120 form a reliable matching relationship.

As described above, a second arc-shaped matching portion 201 is provided on one side of the first rotating arm 212 in the first rotating member 210, and the other side of the first rotating arm 212 needs to be matched with the damping assembly 310. Therefore, the aforementioned other side of the first rotating arm 212 can no longer form a further rotational matching relationship with the mounting seat 110 through the aforementioned second arc-shaped matching portion 201. Based on this, in order to further improve the matching reliability between the first rotating arm 212 and the mounting seat 110, a first arc-shaped matching portion 140 can be provided on one side (referred to as the second side) of the first rotating arm 212 away from the mounting seat 110. The cam 312 is provided with one of the first arc-shaped matching portion 140 and the second arc-shaped matching portion 201, and the other of the first arc-shaped matching portion 140 and the second arc-shaped matching portion 201 is provided at one end of the cam 312 facing the first rotating arm 212, and one of the first arc-shaped matching portion 140 and the second arc-shaped matching portion 201 is an arc-shaped recessed groove, and the other is an arc-shaped protrusion. Furthermore, by utilizing the matching relationship between the first rotating arm 212 and the first arc-shaped matching portion 140 and the second arc-shaped matching portion 201 provided on the cam 312, the reliability of the rotation relationship between the first rotating arm 212 and the mounting seat 110 can also be further improved. In addition, in the above embodiment, the cam 312 can also form a limited matching relationship with the mounting seat 110 in a direction perpendicular to the elastic direction of the elastic member 311 through the bridge member 320. In this case, the matching relationship between the first rotating arm 212 and the mounting seat 110 can be further improved.

Of course, the cam 312 is also used to abut and cooperate with the side surface of the first rotating arm 212 facing the cam 312. In order to ensure that the arc-shaped protrusion (or arc-shaped groove) on the cam 312 and the arc-shaped groove (or arc-shaped protrusion) on the first rotating arm 212 that cooperate with each other will not hinder the cooperation relationship between the cam 312 and the first abutment surface 214a and the second abutment surface 214b of the first rotating arm 212, further, when the cam 312 abuts and cooperates with the first abutment surface 214a, the spacing between the arc-shaped protrusion and the arc-shaped groove respectively arranged on the cam 312 and the first rotating arm 212 in the length direction is greater than or equal to zero. That is, when the cam 312 abuts against the first abutment surface 214a, the arc-shaped protrusions and arc-shaped grooves respectively arranged on the cam 312 and the first rotating arm 212 at most contact each other, and when the distance between the two is greater than zero, when the cam 312 abuts against the first abutment surface 214a, the arc-shaped protrusions and arc-shaped grooves respectively arranged on the cam 312 and the first rotating arm 212 are spaced apart from each other, thereby not hindering the abutment and cooperation process between the cam 312 and the first abutment surface 214a, and ensuring that the cam 312 can stably abut against the first abutment surface 214a or the second abutment surface 214b.

Of course, when the first rotating arm 212 is provided with the above-mentioned third abutment surface 214c, when the cam 312 abuts against the third abutment surface 214c, the distance between the arc-shaped protrusions and the arc-shaped grooves respectively arranged on the cam 312 and the first rotating arm 212 in the length direction can be greater than or equal to zero, thereby ensuring that the arc-shaped protrusions and the arc-shaped grooves will not hinder the mutual abutment between the cam 312 and the third abutment surface 214c.

More specifically, an arc-shaped groove can be set on the second side of the first rotating arm 212 facing the cam 312, and the above-mentioned first abutment surface 214a and the second abutment surface 214b (as well as the third abutment surface 214c) are formed on the end surfaces of the two sheet structures used to form the arc-shaped groove facing the cam 312. Accordingly, an arc-shaped protrusion is formed in the middle part of the cam 312, and then the parts of the cam 312 located on the opposite sides of the arc-shaped protrusion are respectively abutted and cooperated with the two sheet structures forming the arc-shaped groove on the first rotating arm 212, so as to further improve the cooperation stability between the cam 312 and the first rotating arm 212.

As described above, the display screen can be supported on the screen support part and the hinge mechanism, and the mounting base 110 can be used to provide a certain support effect for the display screen. In order to make the support effect of the display screen relatively better, optionally, the hinge mechanism disclosed in the embodiment of the present application can also include a first support part 410 and a second support part 420, and the first support part 410 and the second support part 420 are both used to support the display screen of the electronic device. Specifically, the first support part 410 and the second support part 420 can both be plate-like structures, or both include a support member of a plate-like structure, so as to use the support member of the plate-like structure to provide a relatively stable and uniform support effect for the display screen, ensure that the display effect of the display screen is relatively good, and make the service life of the display screen relatively long.

At the same time, the first support portion 410 is fixed to the first rotating member 210, and the second support portion 420 is fixed to the second rotating member 220, so that as the first rotating member 210 and the second rotating member 220 rotate relative to each other, The first support part 410 and the second support part 420 can also rotate relative to each other, so that when the display screen is folded, the first support part 410 and the second support part 420 can provide a space for the display screen to avoid being squeezed by folding. In addition, in order to improve the movement stability of the first support part 410 and the second support part 420, the first support part 410 and the second support part 420 can also form a rotational matching relationship with the mounting seat 110.

As described above, the display screen can be supported by arranging the first support portion 410 and the second support portion 420 in the hinge mechanism, and in the above embodiment, the first support portion 410 and the first rotating member 210 can be fixed to each other, and the second support portion 420 and the second rotating member 220 can be fixed to each other.

In another embodiment of the present application, the mounting seat 110 and the first rotating member 210 can be rotatably connected to the first support portion 410, and the mounting seat 110 and the second rotating member 220 can be rotatably connected to the second support portion 420, so that the first support portion 410 has the ability to rotate relative to the first rotating member 210, and the second support portion 420 has the ability to rotate relative to the second rotating portion. Based on this, when the hinge mechanism is in a folded state, the first support portion 410 and the second support portion 420 can be in a flared structure, and the flared opening formed by the two is oriented in the direction where the mounting seat 110 is located.

Specifically, corresponding rotating structures can be provided on the first support part 410 and the second support part 420, and the rotating structures have a preset rotating track, so that when the first support part 410 is mounted on the mounting seat 110 and the first rotating member 210, and the second support part 420 is mounted on the mounting seat 110 and the second rotating member 220, when the first rotating member 210 and the second rotating member 220 are both rotated relative to the mounting seat 110, the first support part 410 and the second support part 420 can rotate accordingly, and finally rotate to a flared state. When the above technical solution is adopted, the first support part 410 and the second support part 420 can provide a larger avoidance space for the display screen, and adapt to the shape of the bent part of the display screen, further preventing the display screen from being squeezed during the folding process.

Based on the hinge mechanism disclosed in the above embodiments, the embodiment of the present application further discloses an electronic device, which includes a display screen and a plurality of screen support parts, and the hinge mechanism disclosed in any of the above embodiments. Optionally, the number of screen support parts can be two, and the two screen support parts can be a first screen support part and a second screen support part. In the process of assembling the electronic device, the first screen support part can be fixedly connected to the first connection part 211 by using a connecting member such as adhesive or screws, and the second screen support part can be fixedly connected to the first connection part 211 by using an adhesive or screw. The support portion is fixedly connected to the second connection portion 221 so that the first screen support portion and the second screen support portion can form a rotational matching relationship through a hinge mechanism; at the same time, the display screen is supported on the first screen support portion and the second screen support portion, so that under the action of the hinge mechanism, the first screen support portion and the second screen support portion can drive the display screen to switch between a folded state and an unfolded state.

It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims (10)

1. A hinge mechanism comprises a mounting seat, a first rotating member, a second rotating member and a damping assembly, wherein:

   The first rotating member and the second rotating member are respectively arranged on opposite sides of the mounting seat, the first rotating member includes a first rotating arm, the second rotating member includes a second rotating arm, and the first rotating arm and the second rotating arm are both rotatably matched with the mounting seat along a direction around the length direction of the mounting seat;

   The damping assembly includes an elastic member, the elastic direction of the elastic member includes a component along the length direction, the first rotating arm is equipped with the damping assembly, the first end of the elastic member abuts against the mounting seat, and the second end of the elastic member is used to abut and cooperate with the first rotating arm;

   The end surface of the first rotating arm facing the elastic member includes a first abutting surface and a second abutting surface, the first abutting surface and the second abutting surface of the first rotating arm are smoothly connected, and the distance between the first abutting surface and the first end of the elastic member is greater than the distance between the second abutting surface and the first end of the elastic member;

   When the hinge mechanism is in one of the unfolded state and the folded state, the first abutment surface abuts against the elastic member, and the elastic member is in a natural state or a compressed state. When the hinge mechanism is in a critical state between the unfolded state and the folded state, the second abutment surface abuts against the elastic member.
2. The hinge mechanism according to claim 1, wherein the end surface of the first rotating arm facing the elastic member further comprises a third abutting surface, the third abutting surface is smoothly connected to a side of the second abutting surface facing away from the first abutting surface, and the distance between the third abutting surface and the first end of the elastic member is greater than the distance between the second abutting surface and the first end of the elastic member;

   When the hinge mechanism is in the other of the unfolded state and the folded state, the third abutting surface is in abutment with the elastic member, and the elastic member is in a natural state or a compressed state.
3. According to the hinge mechanism according to claim 1, the damping assembly further comprises a cam, the cam abuts against the second end of the elastic member, and the cam is in point contact or line contact with the end surface of the first rotating arm facing the elastic member.
4. According to the hinge mechanism of claim 3, wherein the second rotating arm is equipped with the damping assembly, and among the multiple damping assemblies, the second end of at least one elastic member is used to abut and cooperate with the first rotating arm, and the second end of at least another elastic member is used to abut and cooperate with the second rotating arm, and the end surface of the second rotating arm facing the elastic member includes a first abutting surface and a second abutting surface.
5. The hinge mechanism according to claim 4, wherein the hinge mechanism further comprises a synchronizing member, the synchronizing member is disposed on a side of the mounting seat adjacent to the first rotating member and the second rotating member, and the synchronizing member and the mounting seat are movably matched in the length direction of the mounting seat;

   The synchronizer is provided with a first limiting groove and a second limiting groove, the first rotating member further comprises a first connecting portion and a first driving arm, the first rotating arm and the first driving arm are both connected to the same side of the first connecting portion, the second rotating member comprises a second connecting portion and a second driving arm, the second rotating arm and the second driving arm are both connected to the same side of the second connecting portion;

   The first driving arm and the second driving arm both extend around the length direction, and their rotation directions are opposite. The first driving arm slides in cooperation with the first limiting groove, and the second driving arm slides in cooperation with the second limiting groove. When the first rotating member rotates along the first rotation direction relative to the mounting seat, the first driving arm drives the synchronous member to move along the length direction relative to the mounting seat, and the synchronous member drives the second driving arm to rotate along the second rotation direction relative to the mounting seat, and the second rotation direction is opposite to the first rotation direction.
6. The hinge mechanism according to claim 5, wherein the hinge mechanism further comprises a bridging member, and the cams of the plurality of damping assemblies respectively cooperating with the first rotating member and the second rotating member are fixed to the bridging member.
7. According to the hinge mechanism of claim 6, wherein the mounting seat is provided with a limiting groove, the bridging member and the limiting groove are movably matched in the elastic direction of the elastic member, and the two are limitedly matched in a direction perpendicular to the elastic direction of the elastic member.
8. The hinge mechanism according to claim 3, wherein the mounting seat is provided with a first accommodating groove, one of the two side walls of the first accommodating groove opposite to each other along the length direction is provided with a first arc-shaped matching portion, the first side of the first rotating arm is provided with a second arc-shaped matching portion rotatably matched with the first arc-shaped matching portion of the first accommodating groove, one of the first arc-shaped matching portion and the second arc-shaped matching portion is an arc-shaped recessed groove, and the other is an arc-shaped protrusion.
9. The hinge mechanism according to claim 8, wherein one of the first arc-shaped matching portion and the second arc-shaped matching portion is provided on the second side of the first rotating arm, and the other of the first arc-shaped matching portion and the second arc-shaped matching portion is provided on one end of the cam facing the first rotating arm, one of the first arc-shaped matching portion and the second arc-shaped matching portion is an arc-shaped recessed groove, and the other is an arc-shaped protrusion, and when the cam is in abutment with the first abutting surface, the spacing between the arc-shaped protrusion and the arc-shaped recessed groove in the length direction is greater than or equal to zero.
10. An electronic device comprises a first screen support portion, a second screen support portion, a display screen and the hinge mechanism described in any one of claims 1 to 9, wherein the first screen support portion is fixedly connected to the first rotating member, the second screen support portion is fixedly connected to the second rotating member, and the display screen is supported by the first screen support portion and the second screen support portion.