Hinge mechanism

Abstract

The embodiment of the utility model relates to the technical field of hinge structures, and particularly discloses a hinge mechanism which is applied to a first part and a second part which need to rotate relatively, and the hinge mechanism comprises a first base, an elastic part and a second base. The first base is provided with a rotating groove and a containing groove, a groove opening of the containing groove is located in the groove bottom of the rotating groove, an included angle exists between the extending direction of the containing groove and the extending direction of the rotating groove, and the first base is installed on a first part. The elastic piece is contained in the containing groove, and the extension and contraction direction of the elastic piece is the same as the extension direction of the containing groove. The second base comprises a rotating shaft and a base body, the rotating shaft is installed on the base body, the rotating shaft is contained in the rotating groove, the rotating shaft can rotate relative to the first base, the rotating shaft is further provided with a plurality of limiting grooves distributed in the circumferential direction, the elastic pieces can stretch into or leave the limiting grooves, and the base body is installed on the second part. Through the structure, the exposed part of the elastic piece is reduced, the occupied space of the elastic piece is reduced, and the elastic piece is protected by the first base.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of hinge structures, and in particular to a hinge mechanism. Background Art

[0002] Hinge structure refers to a mechanical structure composed of several connecting rods connected by hinges. It is a mechanical connection method widely used in various fields. It is widely used in the fields of construction, furniture, ships, etc. to connect two parts that need to rotate or swing relative to each other.

[0003] In some practical application scenarios, a damping structure is added to the hinge mechanism to adapt to rotation or swing in different situations.

[0004] In the process of realizing the present application, the inventor found that: currently, the hinge damping mechanism includes two relatively rotating parts, a hinge assembly and a damping assembly, the hinge assembly is respectively installed on the two parts, and the damping assembly is installed between a part of the hinge assembly and a part. However, this method makes the damping assembly exposed, occupies a large space, and is easy to be damaged. Utility Model Content

[0005] The embodiment of the present application provides a hinge mechanism that can improve the current situation where the damping component is exposed, occupies a large space, and is easily damaged.

[0006] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a hinge mechanism, which is applied to a first part and a second part that need to rotate relative to each other, and the hinge mechanism includes: a first base, an elastic member, and a second base. The first base is provided with a rotation groove and a receiving groove, the notch of the receiving groove is located at the groove bottom of the rotation groove, and there is an angle between the extension direction of the receiving groove and the extension direction of the rotation groove, and the first base is installed on the first part. The elastic member is received in the receiving groove, and the extension and contraction direction of the elastic member is the same as the extension direction of the receiving groove. The second base includes a rotating shaft and a seat body, the rotating shaft is installed on the seat body, the rotating shaft is received in the rotating groove, and the rotating shaft can rotate relative to the first base, the rotating shaft is also provided with a plurality of limiting grooves distributed along the circumferential direction, the elastic member can extend into or leave the limiting groove, and the seat body is installed on the second part.

[0007] Optionally, the first base is further provided with a clearance groove, which is arranged at the connection between the receiving groove and the rotating groove, the clearance groove is arranged around the receiving groove, and the elastic member is at least partially exposed in the clearance groove.

[0008] Optionally, the elastic member includes a spring needle; or, the elastic member includes a shell, a contact head and a spring, the shell is installed in the receiving groove, the shell is recessed with a sliding cavity, the contact head is at least partially accommodated in the sliding cavity, and the contact head can slide relative to the shell under the drive of the spring, the contact head is used to contact the limiting groove and slide relative to the limiting groove, one end of the spring is connected to the contact head, and the other end is connected to the bottom of the sliding cavity.

[0009] Optionally, when the elastic member includes a spring pin, the length of the spring pin when contracted is less than or equal to the distance between the outer surface of the shaft and the bottom of the receiving groove. When the elastic member includes a housing, a contact head and a spring, the minimum length between the contact head and the bottom of the sliding cavity is less than or equal to the distance between the outer surface of the shaft and the bottom of the sliding cavity.

[0010] Optionally, the limiting groove is arc-shaped and concave relative to the rotating shaft. The outer contour of the spring pin is matched with the inner contour of the limiting groove. Alternatively, the contact head is semi-circular and protrudes relative to the housing, and the outer contour of the contact head is matched with the inner contour of the limiting groove.

[0011] Optionally, the rotating shaft may be provided with a plurality of groups of the limiting grooves, the plurality of groups of the limiting grooves are arranged along the axial direction of the rotating shaft, and the distribution of one group of the limiting grooves in the circumferential direction of the rotating shaft is staggered with the distribution of another group of the limiting grooves in the circumferential direction of the rotating shaft. The first base is also provided with a number of receiving grooves corresponding to the number of groups of the limiting grooves. The hinge mechanism also includes a number of elastic members corresponding to the number of groups of the limiting grooves. The elastic members, the receiving grooves, and a group of limiting grooves are correspondingly arranged.

[0012] Optionally, the first base further includes a first limiting wall and a second limiting wall, and the first limiting wall and the second limiting wall are concave to form the rotation groove. The seat body includes a third limiting wall and a fourth limiting wall, and the third limiting wall and the fourth limiting wall connect the rotating shaft and the seat body. When the first limiting wall abuts against the third limiting wall, the hinge mechanism is in a first limit position; when the second limiting wall abuts against the fourth limiting wall, the hinge mechanism is in a second limit position. The hinge mechanism can rotate between the first limit position and the second limit position.

[0013] Optionally, the outer contour of the first limiting wall is adapted to the outer contour of the third limiting wall in an arc shape. The outer contour of the second limiting wall is adapted to the outer contour of the fourth limiting wall in a right angle.

[0014] Optionally, an escape portion is further provided at the end of the second limiting wall away from the rotation groove. When the hinge mechanism rotates to the second limit position, the escape portion is located between the second limiting wall and the fourth limiting wall.

[0015] Optionally, the first base also includes a first fixing part and a second fixing part, and the first base is also provided with an axial hole, the axial holes are respectively provided at the first fixing part and the second fixing part, the rotating shaft is rotatably installed between the first fixing part and the second fixing part, the rotating shaft is inserted into the axial hole, and the rotating shaft can rotate around the axis of the axial hole relative to the first base.

[0016] The beneficial effect of the embodiment of the present application is as follows: Different from the prior art, the embodiment of the present application provides a hinge mechanism, which is applied to a first part and a second part that need to rotate relative to each other, and the hinge mechanism includes: a first base, an elastic member, and a second base. The first base is provided with a rotation groove and a receiving groove, the notch of the receiving groove is located at the groove bottom of the rotation groove, and there is an angle between the extension direction of the receiving groove and the extension direction of the rotation groove, and the first base is installed on the first part. The elastic member is received in the receiving groove, and the extension and contraction direction of the elastic member is the same as the extension direction of the receiving groove. The second base includes a rotating shaft and a seat body, the rotating shaft is installed on the seat body, the rotating shaft is received in the rotating groove, and the rotating shaft can rotate relative to the first base, the rotating shaft is also provided with a plurality of limiting grooves distributed along the circumferential direction, the elastic member can extend into or leave the limiting groove, and the seat body is installed on the second part. Through the above structure, the elastic member is arranged at the bottom of the rotating groove, thereby reducing the exposed part of the elastic member, reducing the space occupied by the elastic member, and protecting the elastic member through the first base to prevent damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional diagram of a hinge mechanism, a first part and a second part provided in one embodiment of the present application;

[0019] Figure 2 is an exploded view of a hinge mechanism, a first part, and a second part provided in one embodiment of the present application;

[0020] Figure 3 One embodiment of the present application provides Figure 2 A magnified view of part B;

[0021] Figure 4 One embodiment of the present application provides Figure 1 A-side cross-sectional view.

[0022] The reference numerals are as follows:

[0023] Hinge mechanism 1000 Shaft 310 First base 100 Limit slot 311 Rotation groove 110 seat body 320 Storage tank 120 The third limiting wall 321 Give way slot 130 Fourth limit wall 322 The first limiting wall 140 Elastic parts 200 The second limiting wall 150 shell 210 Avoidance Department 151 Sliding cavity 211 First fixing part 160 Contact head 220 Second fixing part 170 spring 230 Shaft hole 180 First Part 2000 Second base 300 Second part 3000 DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0026] In the application scenario of the embodiment of the present application, the hinge mechanism 1000 is used to be installed on a first part 2000 and a second part 3000 that need to rotate relative to each other, wherein the first part 2000 and the second part 3000 can be plates, blocks or other parts that need to rotate relative to each other.

[0027] See also Figures 1 to 3The present application provides a hinge mechanism 1000. Applicable to a first part 2000 and a second part 3000 that need to rotate relative to each other, the hinge mechanism 1000 includes: a first base 100, an elastic member 200, and a second base 300. The first base 100 is provided with a rotation groove 110 and a receiving groove 120, the notch of the receiving groove 120 is located at the groove bottom of the rotation groove 110, and there is an angle between the extension direction of the receiving groove 120 and the extension direction of the rotation groove 110, and the first base 100 is installed on the first part 2000. The elastic member 200 is received in the receiving groove 120, and the extension and contraction direction of the elastic member 200 is the same as the extension direction of the receiving groove 120. The second base 300 includes a rotating shaft 310 and a seat body 320. The rotating shaft 310 is mounted on the seat body 320. The rotating shaft 310 is received in the rotating groove 110, and the rotating shaft 310 can rotate relative to the first base 100. The rotating shaft 310 is also provided with a plurality of limiting grooves 311 distributed along the circumferential direction. The elastic member 200 can extend into or leave the limiting grooves 311. The seat body 320 is mounted on the second part 3000. It should be noted that the first base 100 can be a separate part, so as to be mounted on the first part 2000, so as to facilitate the mass production of the first base 100; or, the first base 100 can be integrally formed with the first part 2000, so as to improve the structural strength of the first base 100 and the first part 2000. Accordingly, the second base 300 can be a separate part, so as to be mounted on the second part 3000, so as to facilitate the mass production of the second base 300; or, the second base 300 can be integrally formed with the second part 3000, so as to improve the structural strength of the second base 300 and the second part 3000; preferably, the rotating shaft 310 and the seat body 320 are integrally formed, so as to prevent the rotating shaft 310 from having relative movement with the second base 300 during the rotation process. It can be understood that in order to facilitate the rotation of the rotating shaft 310, the rotating groove 110 is set to be an arc shape to prevent interference with the rotating shaft 310. Optionally, the direction in which the receiving groove 120 extends is perpendicular to the rotation axis of the rotating shaft 310, so that the elastic member 200 moves smoothly and continuously when extending into or leaving the limiting groove 311, thereby improving the user experience; in some other embodiments, the angle between the direction in which the receiving groove 120 extends and the rotation axis of the rotating shaft 310 can also be 30°, 45°, 60°, 80°, etc., so as to adapt to different work requirements. For example, when the rotating shaft 310 rotates in both directions, it needs to be subjected to different resistances. The angle between the receiving groove 120 and the rotation axis of the rotating shaft 310 can be adjusted to change the thrust of the elastic member 200 on the limiting groove 311. Optionally, the length of the limiting groove 311 in the axial direction of the rotating shaft 310 can be greater than the size of the elastic member 200, so as to prevent the deviation in the workpiece manufacturing process from causing installation interference.

[0028] For further information, see Figure 3, and in combination with other drawings. The first base 100 is further provided with a clearance groove 130, which is provided at the connection between the receiving groove 120 and the rotating groove 110, and the clearance groove 130 is provided around the receiving groove 120, and the elastic member 200 is at least partially exposed in the clearance groove 130. Specifically, the size of the clearance groove 130 is larger than the size of the limiting groove 311, so as to facilitate the rotation of the rotating shaft 310 relative to the first base 100.

[0029] For the elastic member 200, see Figure 3 and Figure 4 , and in combination with other drawings. The elastic member 200 includes a spring pin; or, the elastic member 200 includes a shell 210, a contact head 220 and a spring 230. The shell 210 is installed in the receiving groove 120. The shell 210 is concavely provided with a sliding cavity 211. The contact head 220 is at least partially accommodated in the sliding cavity 211. The contact head 220 can slide relative to the shell 210 under the drive of the spring 230. The contact head 220 is used to contact the limiting groove 311 and slide relative to the limiting groove 311. One end of the spring 230 is connected to the contact head 220, and the other end is connected to the bottom of the sliding cavity 211. Specifically, the shell 210 is installed in the receiving groove 120 and is partially exposed at the bottom of the groove of the yield groove 130, thereby increasing the contact area between the shell 210 and the first base 100 and improving the bonding strength. The spring 230 in the embodiment of the present application is configured as a compression spring, and in some other embodiments it can also be configured as a tension spring. The specific structure can be changed according to actual usage conditions. The spring 230 only needs to generate thrust on the limit groove 311 to buffer the rotation of the shaft 310.

[0030] Further, when the elastic member 200 includes a spring pin, the length of the spring pin when it is contracted is less than or equal to the distance between the outer surface of the rotating shaft 310 and the bottom of the receiving groove 120. When the elastic member 200 includes a housing 210, a contact head 220 and a spring 230, the minimum length between the contact head 220 and the bottom of the sliding cavity 211 is less than or equal to the distance between the outer surface of the rotating shaft 310 and the bottom of the sliding cavity 211. Accordingly, the length of the spring pin when it is extended is equal to the distance between the limiting groove 311 and the bottom of the receiving groove 120; when the elastic member 200 includes a housing 210, a contact head 220 and a spring 230, the maximum length between the contact head 220 and the bottom of the sliding cavity 211 is equal to the distance between the limiting groove 311 and the bottom of the sliding cavity 211. During the rotation of the rotating shaft 310 relative to the first base 100, the elastic member 200 always abuts against the limiting groove 311 or the outer surface of the rotating shaft 310, so that the sliding of the elastic member 200 relative to the rotating shaft 310 is continuous and stable, so that the thrust provided by the elastic member 200 to the rotating shaft 310 changes linearly, thereby improving the user experience.

[0031] For further information, see Figure 4, and combined with other drawings. The limiting groove 311 is concave relative to the rotating shaft 310 in an arc shape. The outer contour of the spring pin is matched with the inner contour of the limiting groove 311; or, the contact head 220 is protruding relative to the housing 210 in a semi-circular arc shape, and the outer contour of the contact head 220 is matched with the inner contour of the limiting groove 311. It can be understood that in order to facilitate the spring pin or the contact head 220 to extend into the limiting groove 311, the limiting groove 311 extends along the axial direction of the rotating shaft 310, thereby increasing the area of ​​the inner surface of the limiting groove 311. It can be understood that the arc-shaped limiting groove 311 facilitates the spring pin or the contact head 220 to slide into or out of the limiting groove 311, so that the rotation of the hinge mechanism 1000 is continuous and stable.

[0032] In combination with the above embodiments, in other embodiments of the present application, the rotating shaft 310 may be provided with multiple groups of limiting grooves 311, and the multiple groups of limiting grooves 311 are arranged along the axial direction of the rotating shaft 310, and the distribution of one group of limiting grooves 311 in the circumferential direction of the rotating shaft 310 is staggered with the distribution of another group of limiting grooves 311 in the circumferential direction of the rotating shaft 310. The first base 100 is also provided with a number of receiving grooves 120 corresponding to the number of groups of limiting grooves 311. The hinge mechanism 1000 also includes a number of elastic members 200 corresponding to the number of groups of limiting grooves 311. The elastic member 200, the receiving groove 120, and a group of limiting grooves 311 are correspondingly arranged. Through the above arrangement, the elastic member 200 and the limiting groove 311 slide relative to each other for multiple times during the rotation of the hinge mechanism 1000, thereby increasing the damping of the hinge mechanism 1000, so as to increase the opening and closing gear of the relative rotation of the first part 2000 and the second part 3000.

[0033] In the embodiments of this application, please refer to Figure 3 and Figure 4, and in combination with other drawings. The first base 100 also includes a first limiting wall 140 and a second limiting wall 150, and the first limiting wall 140 and the second limiting wall 150 are concave to form a rotation groove 110. The seat body 320 includes a third limiting wall 321 and a fourth limiting wall 322, and the third limiting wall 321 and the fourth limiting wall 322 connect the rotating shaft 310 and the seat body 320. When the first limiting wall 140 abuts against the third limiting wall 321, the hinge mechanism 1000 is in the first limit position; when the second limiting wall 150 abuts against the fourth limiting wall 322, the hinge mechanism 1000 is in the second limit position. The hinge mechanism 1000 can rotate between the first limit position and the second limit position. By setting the first limiting wall 140 and the second limiting wall 150, the relative rotation between the first base 100 and the second base 300 is limited, so that the first part 2000 and the second part 3000 can be relatively rotated to be flat, or other relative states; accordingly, the relative angle between the first limiting wall 140 and the second limiting wall 150, and the relative angle between the third limiting wall 321 and the fourth limiting wall 322 can be changed to adjust the relative state of the first part 2000 and the second part 3000 at the first extreme position and the second extreme position.

[0034] For further information, see Figure 4 , and combined with other drawings. The outer contour of the first limiting wall 140 is adapted to the outer contour of the third limiting wall 321 in an arc shape. The outer contour of the second limiting wall 150 is adapted to the outer contour of the fourth limiting wall 322 at a right angle. In the embodiment of the present application, the outer contours of the second limiting wall 150 and the fourth limiting wall 322 are at a right angle to facilitate the alignment of the boundary gap when the first part 2000 and the second part 3000 are flatly connected. The arc-shaped adaptation between the first limiting wall 140 and the third limiting wall 321 is to prevent the first limiting wall 140 and the third limiting wall 321 from contacting multiple times without the obstruction of the first part 2000 and the second part 3000, resulting in the sharp first limiting wall 140 wearing the third limiting wall 321, thereby achieving the purpose of protecting the seat body 320, and also preventing the third limiting wall 321 from being accidentally touched and causing damage to the human body.

[0035] For further information, see Figure 4, and in combination with other drawings. The end of the second limiting wall 150 away from the rotation groove 110 is also provided with an avoidance portion 151. When the hinge mechanism 1000 is rotated to the second limit position, the avoidance portion 151 is located between the second limiting wall 150 and the fourth limiting wall 322. The avoidance portion 151 is provided on the one hand to prevent the hinge mechanism 1000 from being unable to fully rotate to the second limit position when there are tolerances in the parts or errors in the assembly. In addition, after the avoidance portion 151 is provided in the present application, when in the second limit position, the first part 2000 and the second part 3000 can contact first, and the connection between the fourth limiting wall 322 and other parts of the second base 300 will not be in hard contact with the second limiting wall 150, thereby further protecting the second limiting wall 150 and the fourth limiting wall 322.

[0036] In the embodiments of this application, please refer to Figure 3 , and in combination with other drawings. The first base 100 also includes a first fixing portion 160 and a second fixing portion 170. The first base 100 is also provided with an axial hole 180, which is respectively provided at the first fixing portion 160 and the second fixing portion 170. The rotating shaft 310 is rotatably installed between the first fixing portion 160 and the second fixing portion 170. The rotating shaft 310 is inserted into the axial hole 180, and the rotating shaft 310 can rotate relative to the first base 100 around the axis of the axial hole 180. It can be understood that the protruding parts of the first fixing portion 160 and the second fixing portion 170 are set in an arc shape, so as to facilitate the rotation of the second base 300 relative to the first base 100.

[0037] The embodiment of the present application provides a hinge mechanism 1000, which is applied to a first part 2000 and a second part 3000 that need to rotate relative to each other. The hinge mechanism 1000 includes: a first base 100, an elastic member 200, and a second base 300. The first base 100 is provided with a rotation groove 110 and a receiving groove 120. The notch of the receiving groove 120 is located at the groove bottom of the rotation groove 110. There is an angle between the extension direction of the receiving groove 120 and the extension direction of the rotation groove 110. The first base 100 is installed on the first part 2000. The elastic member 200 is received in the receiving groove 120. The extension and contraction direction of the elastic member 200 is the same as the extension direction of the receiving groove 120. The second base 300 includes a rotating shaft 310 and a seat body 320. The rotating shaft 310 is installed on the seat body 320. The rotating shaft 310 is received in the rotating groove 110 and can rotate relative to the first base 100. The rotating shaft 310 is also provided with a plurality of limiting grooves 311 distributed along the circumferential direction. The elastic member 200 can extend into or leave the limiting groove 311. The seat body 320 is installed on the second part 3000. Through the above structure, the elastic member 200 is arranged at the bottom of the rotating groove 110, thereby reducing the exposed part of the elastic member 200, reducing the space occupied by the elastic member 200, and protecting the elastic member 200 through the first base 100 to prevent damage.

[0038] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not intended to be additional limitations on the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all deemed to be within the scope of the present application specification; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A hinge mechanism, applied to a first part and a second part that need to rotate relative to each other, characterized in that: include: A first base is provided with a rotation groove and a receiving groove, wherein the notch of the receiving groove is located at the groove bottom of the rotation groove, an angle is formed between the extending direction of the receiving groove and the extending direction of the rotation groove, and the first base is mounted on the first part; An elastic member is received in the receiving groove, and the extension and contraction direction of the elastic member is the same as the extension direction of the receiving groove; The second base includes a rotating shaft and a seat body, wherein the rotating shaft is installed on the seat body, the rotating shaft is accommodated in the rotating groove, and the rotating shaft can rotate relative to the first base. The rotating shaft is also provided with a plurality of limiting grooves distributed along the circumferential direction, the elastic member can extend into or leave the limiting groove, and the seat body is installed on the second part.

2. The hinge mechanism according to claim 1, characterized in that: The first base is further provided with a clearance groove, which is arranged at the connection between the receiving groove and the rotating groove, and the clearance groove is arranged around the receiving groove, and the elastic member is at least partially exposed in the clearance groove.

3. The hinge mechanism according to claim 1, characterized in that: The elastic member comprises a spring pin; Alternatively, the elastic member includes a shell, a contact head and a spring, the shell is installed in the receiving groove, the shell is recessed with a sliding cavity, the contact head is at least partially received in the sliding cavity, and the contact head can slide relative to the shell under the drive of the spring. The contact head is used to contact the limit groove and slide relative to the limit groove, one end of the spring is connected to the contact head, and the other end is connected to the bottom of the sliding cavity.

4. The hinge mechanism according to claim 3, characterized in that: When the elastic member includes a spring pin, the length of the spring pin when contracted is less than or equal to the distance between the outer surface of the rotating shaft and the bottom of the receiving groove; When the elastic member includes a housing, a contact head and a spring, the minimum length between the contact head and the bottom of the sliding cavity is less than or equal to the distance between the outer surface of the rotating shaft and the bottom of the sliding cavity.

5. The hinge mechanism according to claim 3, characterized in that: The limiting groove is arc-shaped and concave relative to the rotating shaft; The outer contour of the spring pin is adapted to the inner contour of the limiting groove; or, The contact head protrudes relative to the housing in a semicircular arc shape, and the outer contour of the contact head is matched with the inner contour of the limiting groove.

6. The hinge mechanism according to any one of claims 1 to 5, characterized in that: The rotating shaft may be provided with a plurality of groups of the limiting grooves, the plurality of groups of the limiting grooves are arranged along the axial direction of the rotating shaft, and the distribution of one group of the limiting grooves in the circumferential direction of the rotating shaft is staggered with the distribution of another group of the limiting grooves in the circumferential direction of the rotating shaft; The first base is also provided with receiving grooves of a number corresponding to the number of groups of the limiting grooves; The hinge mechanism further includes elastic members of a number corresponding to the number of groups of the limiting grooves; The elastic member, the receiving groove, and a group of limiting grooves are arranged correspondingly.

7. The hinge mechanism according to any one of claims 1 to 5, characterized in that: The first base further comprises a first limiting wall and a second limiting wall, wherein the first limiting wall and the second limiting wall are concave to form the rotation groove; The seat body comprises a third limiting wall and a fourth limiting wall, wherein the third limiting wall and the fourth limiting wall connect the rotating shaft and the seat body; When the first limiting wall abuts against the third limiting wall, the hinge mechanism is in a first limit position; when the second limiting wall abuts against the fourth limiting wall, the hinge mechanism is in a second limit position; The hinge mechanism can rotate between a first extreme position and a second extreme position.

8. The hinge mechanism according to claim 7, characterized in that: The outer contour of the first limiting wall is adapted to the outer contour of the third limiting wall in an arc shape; The outer contour of the second limiting wall is adapted to the outer contour of the fourth limiting wall at a right angle.

9. The hinge mechanism according to claim 8, characterized in that: The end of the second limiting wall away from the rotation groove is also provided with an escape portion; When the hinge mechanism rotates to the second limit position, the avoidance portion is located between the second limiting wall and the fourth limiting wall.

10. The hinge mechanism according to any one of claims 1 to 5, characterized in that: The first base also includes a first fixing part and a second fixing part. The first base is also provided with an axial hole, and the axial holes are respectively provided at the first fixing part and the second fixing part. The rotating shaft is rotatably installed between the first fixing part and the second fixing part. The rotating shaft is inserted into the axial hole, and the rotating shaft can rotate around the axis of the axial hole relative to the first base.

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