A mobile terminal back cover hinge

Abstract

The present invention relates to a rotating shaft for a rear cover of a mobile terminal, which is provided with a base body, a rotating piece and a torque generating and self-locking mechanism. The base body carries the overall structure and enables the rotating piece to slide along an open groove. The elastic element in the torque generating and self-locking mechanism supports a transmission member, and the transmission member contacts the outer circumferential surface of the rotating piece. When the rotating piece rotates, friction is generated at the contact position between the transmission member and the outer circumferential surface of the rotating piece, thereby generating torque. A locking portion is provided on the outer circumferential surface of the rotating piece. When the rotating piece rotates to a position corresponding to the locking portion and the transmission member, the transmission member is lifted up and slides into the locking portion under the action of the elastic element, thereby completing the function of travel self-locking. Compared with a method in which an end shaft rod slides frictionally on a travel guide rail in the inner wall of a shell and this friction force is converted into rotating shaft torque, the torque generating method of the rotating shaft is not controlled by angle, has small dynamic changes, and is stable in torque.

Description

Technical Field

[0001] The present invention relates to the technical field of rotating shafts, and in particular to a rotating shaft for a rear cover of a mobile terminal. Background Art

[0002] The hinge structures in existing mobile terminal smart devices with flip-up back covers are generally complex. Chinese Invention Publication No. CN205605638U discloses an automatic pop-up hinge device, which includes a housing consisting of first and second half-shells, a torsion and elastic biasing mechanism disposed within the housing, and a torque generating device. The rotation of the torsion and elastic biasing mechanism causes the end shaft of the torque generating device to slide frictionally against a travel guide rail within the inner wall of the housing, and this friction is converted into shaft torque. The device has a large number of parts, making assembly difficult and the overall size large. Furthermore, the hinge achieves travel locking by providing first and second guide grooves in the first and second half-shells and a raised portion in the travel guide rail. However, the specific fixing structure is machined within the housing, making machining difficult and preventing the design of a self-locking function in any position. Therefore, there is a need to design a rear cover hinge with a compact structure, simple assembly, and a self-locking function to meet current market demand. Summary of the Invention

[0003] Based on this, the present invention provides a mobile terminal rear cover hinge.

[0004] In order to achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0005] A mobile terminal back cover hinge comprises a base body, which is connected to the mobile terminal shell and plays an integral bearing role, and is provided with an open groove; a rotating piece; the rotating piece is connected to the mobile terminal back cover and is rotatably connected to the open groove, and the mobile terminal back cover is opened and closed on the mobile terminal shell by rotation, and is provided with at least one locking part; and a torque generating and self-locking mechanism; the torque generating and self-locking mechanism comprises an elastic element and a transmission member; the elastic element is arranged on the wall of the open groove structure; one end of the transmission member is connected to the elastic element, and the other end abuts against the rotating piece and fits with the locking part.

[0006] Furthermore, a downwardly recessed assembly groove is provided on the top right side of the base body for connecting with the housing of the mobile terminal.

[0007] Furthermore, the rotating piece includes a sheet body portion and a rotating portion; the sheet body portion is used to connect with the back cover of the mobile terminal; and the rotating portion is used to be rotatably connected to the opening slot.

[0008] Furthermore, the rotating part is a semicircular structure, which is connected to the lower side of the sheet body. Rotating grooves are concentrically provided on the front and rear sides of the rotating part; a rotating boss is provided in the open groove; and the rotating boss fits in the rotating groove.

[0009] Furthermore, an assembly end is provided on the left side of the sheet body; the front-to-back distance of the assembly end is greater than the front-to-back distance of the sheet body; a downwardly recessed bearing groove is provided on the top left side of the seat body; the bearing groove fits with the assembly end and is connected to the opening groove.

[0010] Furthermore, a guide boss is provided on the transmission member; a guide groove is provided on the outer side surface of the rotating part; and the guide groove fits with the guide boss.

[0011] Furthermore, a torsion groove is provided on the opening groove along the front-to-back direction; the longitudinal center line of the torsion groove points to the rotation center of the rotating plate; and the transmission member is slidingly connected to the torsion groove.

[0012] Furthermore, one end of the transmission member is a flat structure, and the other end is an arc-shaped boss structure; the flat structure abuts against the elastic element; and the arc-shaped boss structure abuts against the rotating piece.

[0013] Furthermore, the locking portion is a groove-shaped structure.

[0014] Furthermore, a fixed shaft and an abutment shaft are provided through the open slot in the front-to-back direction; the elastic element is a torsion spring, and is fixedly arranged in the fixed shaft, one end of which abuts against the abutment shaft, and the other end abuts against the transmission member.

[0015] The beneficial effects of the present invention are:

[0016] By providing a seat body, a rotating piece and a torque generating and self-locking mechanism, the seat body carries the overall structure and enables the rotating piece to slide along the open groove; the elastic element supports the transmission part and applies pressure to the transmission part; the transmission part contacts the outer circular surface of the rotating piece; when the rotating piece rotates, friction is generated at the contact position between the transmission part and the outer circular surface of the rotating piece, thereby generating torque; and a locking part is provided on the outer circular surface of the rotating piece. When the rotating piece rotates to the position where the locking part corresponds to the position of the transmission part, the transmission part will be lifted up and slide into the locking part under the action of the elastic element, completing the function of stroke self-locking; compared with the method of using the end shaft to slide frictionally on the travel guide rail in the inner wall of the shell and converting this friction force into the torque of the rotating shaft, the torque generating method of this rotating shaft is not controlled by angle, has small dynamic changes and stable torque; and by setting the center line of the length direction of the torque groove where the transmission part is slidably connected to point to the rotation center of the rotating piece, the contact area between the transmission part and the rotating piece can be increased, and the conversion efficiency can be improved;

[0017] The locking portion is located at the leading and trailing edges of the semicircular structure of the rotating portion, which means that the self-locking position is set at the minimum and maximum rotational travel of the rotating shaft. Corresponding self-locking positions can also be set according to different needs. The self-locking release torque can be adjusted according to the parameters of the elastic element and the depth of the groove structure in the locking portion. Compared with the physical locking method of the rotating shaft by providing a raised portion in the guide groove and travel guide rail, the locking structure of the rotating shaft is simple to manufacture and low in cost. In addition, there is travel feedback during self-locking, and there is a feedback feeling of sliding into the locking portion during physical operation, which provides good user feedback.

[0018] One end of the transmission member is a flat structure, and the other end is an arc-shaped boss structure. The flat structure abuts the elastic element; the arc-shaped boss abuts the rotating plate. The flat structure can ensure the contact stability between the transmission member and the elastic element; the arc-shaped boss can ensure the smooth contact between the transmission member and the transmission plate, avoid jumping, and further improve the stable torque.

[0019] In addition, a guide boss is provided in the center position of the arc-shaped boss structure in the transmission part, and a guide groove that fits therewith is provided on the outer circular surface of the rotating part in the transmission plate. The rotating groove in the rotating part and the rotating boss in the open groove are combined to ensure rotation stability through the two structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the seat body of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the rotating piece of the present invention;

[0023] Figure 4 This is a schematic structural diagram of the rotating piece of the present invention from another perspective;

[0024] Figure 5 It is a structural schematic diagram of the torque generation and self-locking mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the local structure of the present invention;

[0026] Figure 7 This is a schematic structural diagram of the initial rotation state of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the present invention in a maximum rotation state;

[0028] Figure 9 It is a schematic diagram of the rotation state structure of the present invention.

[0029] 100. Base body; 110. Opening groove; 120. Assembly groove; 130. Load-bearing groove; 140. Rotating boss; 150. Fixed shaft; 160. Abutting shaft; 170. Torque groove; 200. Rotating sheet; 210. Sheet body; 211. Assembly end; 220. Rotating portion; 221. Rotating groove; 222. Guide groove; 223. Locking portion; 300. Torque generation and self-locking mechanism; 310. Elastic element; 320. Transmission member; 321. Flat structure; 322. Arc boss structure; 323. Guide boss. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0031] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] like Figures 1-9 As shown,

[0034] A mobile terminal back cover hinge includes a base 100, a rotating piece 200, and a torque generating and self-locking mechanism 300;

[0035] The base 100 is connected to the mobile terminal housing and serves as a supporting structure for the entire device. An opening 110 is formed on the base.

[0036] In this embodiment, a downwardly recessed assembly groove 120 is provided on the top right side of the base body 100 for connecting with the mobile terminal housing. During assembly, the mobile terminal housing is locked in the assembly groove 120 using screws.

[0037] The left top of the base body 100 is provided with a downwardly recessed bearing groove 130, which is connected to the opening groove 110 for use in locking the travel of the rotating piece 200;

[0038] The front and rear inner walls of the opening slot 110 are parallel to each other and are provided with rotating bosses 140 for the rotating piece 200 to rotate with.

[0039] The opening slot 110 is provided with a fixed shaft 150 and an abutting shaft 160 along the front-to-back direction for assembly of the torque generating and self-locking mechanism 300;

[0040] A torsion groove 170 is formed on the opening groove 110 along the front-to-back direction; the longitudinal center line of the torsion groove 170 points to the rotation center of the rotating piece 200 for torque generation and assembly of the self-locking mechanism 300;

[0041] The rotating piece 200 includes a piece body portion 210 and a rotating portion 220;

[0042] The left side of the sheet body 210 is provided with an assembly end 211; the assembly end 211 is used to connect with the back cover of the mobile terminal. During assembly, the back cover of the mobile terminal is locked in the assembly end 211 using screws. The front-to-back distance of the assembly end 211 is greater than the front-to-back distance of the sheet body 210 and fits in the bearing groove 130. By providing the bearing groove 130 on the base 100 and providing the assembly end 211 on the left side of the sheet body 210 that fits in the shape of the bearing groove 130, a fixed locking function is provided during the initial rotation stroke of the shaft to prevent the back cover of the mobile terminal from rotating in the opposite direction. During the initial rotation stroke of the shaft, the assembly end 211 can fit and splice with the bearing groove 130, reducing the overall volume and making the structure of the shaft more compact.

[0043] The rotating portion 220 is a semicircular structure connected to the lower side of the sheet portion 210. The rotating portion 220 has concentric rotating grooves 221 that fit with the rotating boss 140 on its front and rear sides. A guide groove 222 and a locking portion 223 are provided on its outer circumferential surface. In this embodiment, the locking portion 223 is a groove-shaped structure, and two are provided, located at the first and last edges of the semicircular arc. By providing the rotating groove 221 on the rotating portion 220 and providing the rotating boss 140 that fits with it in the open groove 110, the rotating connection of the rotating portion 220 to the open groove 110 is achieved.

[0044] The torque generating and self-locking mechanism 300 includes an elastic element 310 and a transmission member 320;

[0045] In this embodiment, the elastic element 310 is a torsion spring and is fixedly disposed in the fixed shaft 150 , with one end thereof abutting against the abutting shaft 160 and the other end abutting against the transmission member 320 ;

[0046] The transmission member 320 is slidably connected to the torsion groove 170 on the base 100. One end of the transmission member 320 is a flat structure 321, and the other end is an arc-shaped boss structure 322. The flat structure 321 abuts against the elastic element 310. The arc-shaped boss structure 322 abuts against the rotating piece 200. In this embodiment, the arc-shaped boss structure 322 fits with the locking portion 223 on the rotating piece 200. A guide boss 323 is provided at the center of the arc-shaped boss structure 322. The guide boss 323 fits with the guide groove 222.

[0047] By providing a transmission member 320, one end of which abuts against the elastic element 310 and the other end abuts against the rotating piece 200, the elastic force of the elastic element 310 can be transmitted to the rotating piece 200, that is, the elastic force is converted into a sliding friction force, and this sliding friction force constitutes the torsion of the rotating shaft. The torque provided by this method is compared with the method of using the end shaft to slide frictionally on the travel guide rail in the inner wall of the shell and converting this friction force into the torsion of the rotating shaft. The torsion generation method of the rotating shaft is not controlled by the angle, has small dynamic changes, and stable torsion. In addition, by setting the center line of the length direction of the torsion groove 170 to which the transmission member 320 is slidably connected to point to the rotation center of the rotating piece 200, the contact area between the transmission member 320 and the rotating piece 200 can be increased, and the conversion efficiency can be improved.

[0048] Among them, one end of the transmission member 320 is a flat structure 321, and the other end is an arc-shaped boss structure 322. The flat structure 321 abuts against the elastic element 310; the arc-shaped boss structure 322 abuts against the rotating plate 200. The flat structure 321 can ensure the contact stability between the transmission member 320 and the elastic element 310; the arc-shaped boss can ensure the smooth contact between the transmission member 320 and the transmission plate, avoid jumping, and further improve the stable torque.

[0049] When the locking member 223 is in the locked position, the locking member 223 is locked and the locking member 223 is locked.

[0050] A guide boss 323 is provided in the center position of the arc-shaped boss structure 322 in the transmission member 320, and a guide groove 222 that fits therewith is provided on the outer circular surface of the rotating part 220 in the transmission plate. The two structures cooperate with the rotating groove 221 in the rotating part 220 and the rotating boss 140 in the opening groove 110 to ensure rotation stability.

[0051] Working principle:

[0052] When the cam 320 is in the closed position, the spring 320 is in the locked position, so that the cam 320 can be locked in the closed position, and the cam 320 can be locked in the closed position.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A mobile terminal rear cover hinge, characterized in that: The lock mechanism comprises a first locking portion and a second locking portion, wherein the locking portion is engaged with the locking cam and the locking cam, and the locking cam is engaged with the locking cam when the lock mechanism is in a closed position.

2. The mobile terminal rear cover hinge according to claim 1, characterized in that: A downwardly recessed assembly groove is provided on the top right side of the base body for connecting with the mobile terminal housing.

3. The mobile terminal rear cover hinge according to claim 1, characterized in that: The rotating piece includes a sheet body and a rotating part; the sheet body is used to connect with the back cover of the mobile terminal; and the rotating part is used to be rotatably connected with the opening slot.

4. The mobile terminal rear cover hinge according to claim 3, characterized in that: The rotating part is a semicircular structure, which is connected to the lower side of the sheet body. Rotating grooves are concentrically provided on the front and rear sides of the rotating part. A rotating boss is provided in the open groove. The rotating boss fits in the rotating groove.

5. The mobile terminal rear cover hinge according to claim 3, characterized in that: An assembly end is provided on the left side of the sheet body; the front-to-back distance of the assembly end is greater than the front-to-back distance of the sheet body; a downwardly recessed bearing groove is provided on the top left side of the seat body; the bearing groove fits with the assembly end and is connected to the opening groove.

6. The mobile terminal rear cover hinge according to claim 3, characterized in that: The transmission member is provided with a guide boss; the outer side surface of the rotating part is provided with a guide groove; the guide groove is matched with the guide boss.

7. The mobile terminal rear cover hinge according to claim 1 or 6, characterized in that: A torsion groove is provided on the opening groove along the front-to-back direction; the longitudinal center line of the torsion groove points to the rotation center of the rotating plate; and the transmission member is slidably connected to the torsion groove.

8. The mobile terminal rear cover hinge according to claim 7, characterized in that: One end of the transmission member is a flat structure, and the other end is an arc-shaped boss structure; the flat structure abuts against the elastic element; and the arc-shaped boss structure abuts against the rotating piece.

9. The mobile terminal rear cover hinge according to claim 1, characterized in that: The locking portion is a groove-shaped structure.

10. The mobile terminal rear cover hinge according to claim 1, characterized in that: A fixed shaft and an abutment shaft are provided through the open slot in the front-to-back direction; the elastic element is a torsion spring, and is fixedly arranged in the fixed shaft, with one end abutting the abutment shaft and the other end abutting the transmission member.

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