Self-locking hinge structure

Abstract

The utility model relates to a self-locking hinge structure which comprises a connecting rod assembly, a connecting rod assembly, a connecting rod assembly and a connecting rod assembly. The connecting rod assembly comprises a center pin and crank connecting rods hinged to the two opposite ends of the center pin. The two crank connecting rods are in 180-degree symmetry about the center of the center pin; the two supports are movably connected to the two opposite ends of the connecting rod assembly; the self-locking assembly is simultaneously connected with the connecting rod assembly and the bracket; the self-locking assemblies are in one-to-one correspondence with the brackets; the self-locking assembly comprises a pin shaft, an elastic piece arranged on the pin shaft in a sleeving mode and a cam connected to the pin shaft in a sliding and sleeving mode. The position of the pin shaft and the position of the bracket are relatively fixed; the crank connecting rod is clamped between the cam and the support, and the elastic piece elastically drives the cam to be located and embedded in the inner side surface of the short end of the crank connecting rod. The self-locking hinge structure is simple in structure and convenient to use, the elastic piece is used for driving the cam to be embedded with the positioning pit of the crank connecting rod, so that the self-locking function can be achieved when the hinge is opened or closed, the situation that the hinge automatically slides or is closed is effectively prevented, and the use safety is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hinge structures, in particular to a self-locking hinge structure. Background Art

[0002] Foldable screen mobile phones, foldable screen computers, etc. will become the future development trend. For digital products with foldable form, the hinge structure is crucial, and the performance of the hinge will directly affect the function and experience of the entire machine.

[0003] General hinges cannot automatically lock the opening and closing state of digital products, and cannot effectively prevent digital products from being accidentally opened or closed. Therefore, they are prone to sliding or closing during use or storage, affecting the stability of the product and increasing the risk of damage to the screen or internal components. Utility Model Content

[0004] Based on this, the utility model provides a self-locking hinge structure with simple structure and easy use. The elastic part is used to drive the cam and the positioning pits of the crank connecting rod to embed with each other, so that the self-locking function can be realized when the hinge is opened or closed, effectively preventing the hinge from automatically sliding or closing, and greatly improving the safety of use.

[0005] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0006] A self-locking hinge structure, comprising:

[0007] A connecting rod assembly, comprising a center pin and a crank connecting rod hinged at opposite ends of the center pin; the two crank connecting rods are 180 degrees symmetrical about the center of the center pin; the long end of the crank connecting rod is used for sliding connection with one bracket, and the short end of the crank connecting rod is used for hinged connection with another bracket;

[0008] Two brackets movably connected to opposite ends of the connecting rod assembly; and

[0009] A self-locking component is simultaneously connected to the connecting rod component and the bracket; the self-locking component corresponds to the bracket one by one; the self-locking component includes a pin shaft, an elastic member sleeved on the pin shaft, and a cam connected to the pin shaft by a sliding sleeve; the position of the pin shaft is relatively fixed to the position of the bracket; the crank connecting rod is clamped between the cam and the bracket, and the elastic member elastically drives the cam to position the inner surface of the short end of the crank connecting rod.

[0010] The above-mentioned self-locking hinge structure has a simple structure and is easy to use. It utilizes an elastic member to drive the cam and the positioning pits of the crank connecting rod to embed with each other, so that the self-locking function can be achieved when the hinge is opened or closed, effectively preventing the hinge from automatically sliding or closing, and greatly improving the safety of use.

[0011] In one of the embodiments, positioning pits arranged in a circumferential array are provided on the inner surface of the short end of the crank connecting rod; and protrusions are arranged in a circumferential array on the side of the cam facing the crank connecting rod, and the protrusions are used to match and embed the positioning pits.

[0012] In one embodiment, the number of positioning recesses on each crank connecting rod is two, and the circumferential array angle of the positioning recesses is 180 degrees.

[0013] In one embodiment, the long end of the crank connecting rod is connected to a synchronization rod; the bracket is provided with an arc-shaped slide groove, and the slide groove is matched and connected with the synchronization rod.

[0014] In one of the embodiments, a through hole is provided on the crank connecting rod at the center of the array corresponding to the positioning pit; an assembly hole is provided on the side of the bracket away from the slide groove, and the assembly hole corresponds to the through hole one by one; and the shaft body of the pin shaft passes through the through hole and the assembly hole and is connected to the retaining spring outwardly.

[0015] In one embodiment, the assembly hole is a non-circular hole; and the cross-section of the shaft body of the pin is non-circular. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of a self-locking hinge structure in an open state according to an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A three-dimensional schematic diagram of the self-locking hinge structure shown in a closed state;

[0018] Figure 3 for Figure 2 A three-dimensional schematic diagram of the self-locking hinge structure shown in another perspective in a closed state;

[0019] Figure 4 for Figure 2 An exploded schematic diagram of the self-locking hinge structure shown;

[0020] Figure 5 for Figure 4 An enlarged schematic diagram of circle A shown;

[0021] Figure 6 for Figure 1 The exploded schematic diagram of the self-locking component in the self-locking hinge structure shown.

[0022] Notes on the attached drawings:

[0023] 10-connecting rod assembly, 11-center pin, 12-crank connecting rod, 13-synchronizing rod, 14-positioning pit, 15-through hole;

[0024] 20- bracket, 21- slide groove, 22- assembly hole;

[0025] 30 - self-locking assembly, 31 - pin shaft, 32 - elastic member, 33 - cam, 34 - raised portion. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] 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 considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] 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 herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] See also Figures 1 to 6 , which is a self-locking hinge structure of an embodiment of the utility model, includes a connecting rod assembly 10, two brackets 20 movably connected to the opposite ends of the connecting rod assembly 10, and a self-locking assembly 30 that simultaneously connects the connecting rod assembly 10 and the bracket 20; the self-locking assembly 30 corresponds to the bracket 20 one by one.

[0030] The connecting rod assembly 10 includes a center pin 11 and crank connecting rods 12 hinged at opposite ends of the center pin 11; the two crank connecting rods 12 are 180 degrees symmetrical about the center of the center pin 11. The long end of the crank connecting rod 12 is used for sliding connection with one bracket 20, and the short end of the crank connecting rod 12 is used for hinge connection with the other bracket 20.

[0031] like Figure 4 and Figure 5 As shown, the long end of the crank connecting rod 12 is connected to a synchronization rod 13, which is used to slide and connect the bracket 20 to ensure that the two brackets 20 have stable and smooth movement performance during the opening or closing process. The inner surface of the short end of the crank connecting rod 12 is provided with positioning pits 14 arranged in a circumferential array, and the crank connecting rod 12 is provided with a through hole 15 corresponding to the array center of the positioning pit 14. The through hole 15 is used to position the hinged bracket 20, and the positioning pit 14 is used to position the bracket 20 to achieve self-locking.

[0032] In this embodiment, there are two positioning pits 14 on each crank connecting rod 12, that is, the circular array angle of the positioning pits 14 is 180 degrees. It can be simply understood that the two positioning pits 14 are arranged opposite to each other and are used to lock the hinge in an open state or a closed state in actual work.

[0033] It can be further understood that in other embodiments, the number of the positioning recesses 14 on each crank connecting rod 12 can be other numbers, such as three, four or even more, which can correspondingly realize the locking of the hinge at an opening angle of 60 degrees, 90 degrees, etc.

[0034] The bracket 20 is provided with an arc-shaped slide groove 21, which is matched and connected with the synchronization rod 13 to realize the sliding connection between the bracket 20 and the crank connecting rod 12. The bracket 20 has a mounting hole 22 on one side away from the slide groove 21, and the mounting hole 22 corresponds to the through hole 15 one by one, so as to facilitate the positioning and connection of the self-locking component 30. In actual use, one bracket 20 can be used as a fixed bracket, and the other bracket 20 can be movable; or both brackets 20 can be movable.

[0035] In this embodiment, the assembly hole 22 is a non-circular hole to facilitate the synchronous movement of the bracket 20 and the self-locking assembly 30 .

[0036] The self-locking assembly 30 includes a pin 31, an elastic member 32 sleeved on the pin 31, and a cam 33 connected to the pin 31 by a sliding sleeve. The cross section of the shaft body of the pin 31 is non-circular, and the shaft body of the pin 31 matches the assembly hole 22, so that the position of the pin 31 is relatively fixed with the position of the bracket 20. During assembly, the shaft body of the pin 31 passes through the hole 15 and the assembly hole 22 and then connects to the retaining ring (not shown) outward, so that the self-locking assembly 30 simultaneously connects the crank connecting rod 12 and the bracket 20. At this time, the crank connecting rod 12 is sandwiched between the cam 33 and the bracket 20, and the elastic member 32 elastically drives the cam 33 to locate the inner surface of the short end of the crank connecting rod 12. Specifically, the cam 33 has a circumferential array of protrusions 34 on the side facing the crank connecting rod 12, and the protrusions 34 are used to match the embedded positioning pit 14. Therefore, in actual work, when the two brackets 20 are fully opened or fully closed, the protrusion 34 just matches the inside of the embedded positioning pit 14 to achieve a self-locking effect, effectively preventing the hinge from automatically sliding or closing, and greatly improving the safety of use.

[0037] In this embodiment, the elastic member 32 is a spring, a wave spring, a leaf spring or other devices with the same function.

[0038] The above-mentioned self-locking hinge structure has a simple structure and is easy to use. The elastic member 32 is used to drive the cam 33 and the positioning pit 14 of the crank connecting rod 12 to be embedded in each other, so that the self-locking function can be achieved when the hinge is opened or closed, effectively preventing the hinge from automatically sliding or closing, and greatly improving the safety of use.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A self-locking hinge structure, characterized in that: include: A connecting rod assembly, comprising a center pin and a crank connecting rod hinged at opposite ends of the center pin; The two crank connecting rods are 180 degrees symmetrical about the center of the center pin; the long end of the crank connecting rod is used for sliding connection with one bracket, and the short end of the crank connecting rod is used for hinge connection with the other bracket; Two brackets movably connected to opposite ends of the connecting rod assembly; and A self-locking component is simultaneously connected to the connecting rod component and the bracket; the self-locking component corresponds to the bracket one by one; the self-locking component includes a pin shaft, an elastic member sleeved on the pin shaft, and a cam connected to the pin shaft by a sliding sleeve; the position of the pin shaft is relatively fixed to the position of the bracket; the crank connecting rod is clamped between the cam and the bracket, and the elastic member elastically drives the cam to position the inner surface of the short end of the crank connecting rod.

2. The self-locking hinge structure according to claim 1, characterized in that: The inner surface of the short end of the crank connecting rod is provided with positioning pits arranged in a circumferential array; the cam has raised parts in a circumferential array on the side facing the crank connecting rod, and the raised parts are used to match and embed the positioning pits.

3. The self-locking hinge structure according to claim 2, characterized in that: The number of positioning pits on each crank connecting rod is two, and the circular array angle of the positioning pits is 180 degrees.

4. The self-locking hinge structure according to claim 2, characterized in that: The long end of the crank connecting rod is connected with a synchronous rod; the bracket is provided with an arc-shaped sliding groove, and the sliding groove is matched and connected with the synchronous rod.

5. The self-locking hinge structure according to claim 4, characterized in that: A through hole is provided on the crank connecting rod corresponding to the array center of the positioning pit; an assembly hole is provided on the side of the bracket away from the slide groove, and the assembly hole corresponds to the through hole one by one; the shaft body of the pin shaft passes through the through hole and the assembly hole and is connected to the retaining spring outwardly.

6. The self-locking hinge structure according to claim 5, characterized in that: The assembly hole is a non-circular hole; the cross section of the shaft body of the pin shaft is non-circular.

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