A dual self-locking hinge

Abstract

The utility model discloses a double self -locking hinge, it includes a first mounting frame, second mounting frame and pivot, the first mounting frame is equipped with first movable hinged block, second mounting frame is equipped with second movable hinged block, first movable hinged block is equipped with the positioning jack -pot for pivot positioning connection, second movable hinged block is equipped with the slot mouth that along pivot does the arc track activity, first movable hinged block with second movable hinged block between being equipped with first self -locking structure, the pivot is equipped with the press block component, second movable hinged block with the press block component between being equipped with second self -locking structure. The utility model discloses through setting first self -locking structure with second self -locking structure, forms two -stage mechanical locking, double self -locking synergies, effectively prevents the accidental opening of equipment under the storage state because of vibration, drop or accidental touch, greatly promoted the security and structural stability of use.

Description

Technical Field

[0001] This utility model relates to the technical field of hinges, specifically to a double self-locking hinge. Background Technology

[0002] Display stands are primarily used to tilt electronic products such as tablets and mobile phones at a certain angle, facilitating comfortable viewing or use. Existing display stands mainly consist of a base and a support plate, connected by a hinge to open and close. The hinge, as a key component, affects the stability of opening and closing. Traditional hinges often employ single-position or friction self-locking structures, which suffer from insufficient locking force, easy loosening, and short lifespan. Especially after repeated opening and closing, the hinge is prone to wear, leading to self-locking failure, causing the support structure to wobble or unexpectedly unfold when closed, affecting safety and stability. Furthermore, existing hinges often lack effective guidance and cushioning during opening and closing, resulting in a stiff feel and difficulty in achieving smooth and precise positioning. Utility Model Content

[0003] This utility model addresses the shortcomings of current technology by providing a double self-locking hinge, aiming to solve the technical problem of poor stability when the hinge is closed in the prior art.

[0004] The technical solution adopted by this utility model to achieve the above objectives is as follows: A double self-locking hinge includes a first mounting bracket, a second mounting bracket, and a rotating shaft. The first mounting bracket is provided with a first movable hinge block, and the second mounting bracket is provided with a second movable hinge block. The first movable hinge block is provided with a positioning hole for positioning and connecting the rotating shaft, and the second movable hinge block is provided with a slot that moves along an arc-shaped trajectory along the rotating shaft. A first self-locking structure is provided between the first movable hinge block and the second movable hinge block. The rotating shaft is provided with a pressure block assembly, and a second self-locking structure is provided between the second movable hinge block and the pressure block assembly.

[0005] As a further improvement, the first self-locking structure includes a guide self-locking protrusion and a guide self-locking groove that is movably connected to the guide self-locking protrusion. Both the guide self-locking protrusion and the guide self-locking groove are arc structures. The guide self-locking protrusion is disposed on the inner wall of the first movable hinge block, and the guide self-locking groove is disposed on the inner wall of the second movable hinge block in the direction facing the inner wall of the first movable hinge block.

[0006] As a further improvement, the two ends of the guide self-locking protrusion are respectively provided with a first protrusion and a first groove, and the two ends of the guide self-locking groove are respectively provided with a second protrusion and a second groove; when the first movable hinge block and the second movable hinge block are parallel, the first protrusion is engaged in the second groove, and the second protrusion is engaged in the first groove.

[0007] As a further improvement, the slot is an arc-shaped slot, and the pressure block assembly is disposed on the outer wall of the second movable hinge block via the rotating shaft. The pressure block assembly includes a pressure block, an elastic element, and a nut. The rotating shaft includes a first positioning connection part connected to the positioning hole, a rod part for guiding the movement of the slot, a second positioning connection part for positioning and fixing the elastic element, and a threaded part. The pressure block and the elastic element are disposed on the second positioning connection part, and the nut is disposed on the threaded part and moves the elastic element toward the outer wall of the second movable hinge block. The elastic element presses the pressure block against the outer wall of the second movable hinge block.

[0008] As a further improvement, the second self-locking structure includes at least one third protrusion and at least one third groove. The third protrusion is disposed on the inner wall of the pressure block, and the third groove is disposed on the outer wall of the second movable hinge block. When the first movable hinge block and the second movable hinge block are parallel, the third protrusion is engaged in the third groove to form a self-locking mechanism.

[0009] As a further improvement, the elastic element includes two oppositely arranged conical elastic washers, the arched portions of which are in contact with each other; a washer assembly is provided between the nut and the conical elastic washers.

[0010] As a further improvement, the positioning socket includes a positioning hole and a socket, and the first positioning connection part includes a positioning part and a plug part. The positioning part is inserted into the positioning hole, and the plug part is connected to the socket.

[0011] As a further improvement, the pressing block is a circular pressing block, the inner ring of the circular pressing block is provided with at least one positioning plane, and the outer wall of the second positioning connection part is provided with at least one positioning plane one. The positioning plane and the positioning plane one cooperate to position the circular pressing block on the second positioning connection part.

[0012] As a further improvement, the outer ring of the guide self-locking protrusion is provided with an arc-shaped guide groove, and the outer ring of the guide self-locking groove is provided with an arc-shaped guide block that rotates along the arc-shaped guide groove in an arc-shaped trajectory.

[0013] As a further improvement, the first protrusion, the first groove, the second protrusion and the second groove are all provided with inclined surfaces; the third protrusion and the third groove are also provided with an inclined surface.

[0014] As a further improvement, both the first mounting bracket and the second mounting bracket are provided with mounting parts, and each mounting part is composed of multiple mounting holes.

[0015] Compared with the prior art, the above-mentioned technical solutions of the double self-locking hinge provided in this utility model embodiment have at least one of the following technical effects: 1. This utility model forms a two-stage mechanical locking system by setting a first self-locking structure and a second self-locking structure. When the first mounting bracket and the second mounting bracket are in a parallel closed state: the guide self-locking protrusion in the first self-locking structure and the first protrusion and the second groove at both ends of the groove interlock, achieving rigid engagement between the hinge blocks; simultaneously, the third protrusion in the second self-locking structure automatically engages in the third groove under the action of the elastic element, completing the secondary locking of the pressure block assembly and the second movable hinge block. The synergistic effect of the dual self-locking effectively prevents accidental opening of the equipment due to vibration, drops, or accidental contact when it is in the stored state, greatly improving the safety and structural stability of use.

[0016] 2. During the closing process, the first protrusion and the second groove, and the third protrusion and the third groove, engage synchronously at specific positions, producing a distinct "click" sensation and providing the user with clear feedback that the closure is complete; the design of the inclined structure also ensures that locking can only be completed when fully aligned, preventing partial locking or loose locking. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the double self-locking hinge in this embodiment; Figure 2 This is a front view schematic diagram of the double self-locking hinge in this embodiment; Figure 3 This is an exploded view of the double self-locking hinge in this embodiment; Figure 4 This is a schematic diagram of the structure of the second mounting bracket in this embodiment; Figure 5 This is a schematic diagram of the connection structure between the rotating shaft and the pressure block assembly in this embodiment; Figure 6 This is a schematic diagram of the rotating shaft in this embodiment. Detailed Implementation

[0019] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0020] For examples, see the appendix. Figures 1-6 A double self-locking hinge 1 is applied to a support bracket, which is composed of two brackets or two plates. The double self-locking hinge 1 is used for the movable connection between the two brackets or two plates. The double self-locking hinge 1 includes a first mounting bracket 2, a second mounting bracket 3, and a rotating shaft 4. The first mounting bracket 2 is provided with a first movable hinge block 5, and the second mounting bracket 3 is provided with a second movable hinge block 6. The first movable hinge block 5 is provided with a positioning insertion hole 50 for positioning and connecting the rotating shaft 4, and the second movable hinge block 6 is provided with a slot 60 that moves along the arc trajectory of the rotating shaft 4. A first self-locking structure 7 is provided between the first movable hinge block 5 and the second movable hinge block 6. The rotating shaft 4 is provided with a pressure block assembly 40, and a second self-locking structure 8 is provided between the second movable hinge block 6 and the pressure block assembly 40.

[0021] The first self-locking structure 7 includes a guide self-locking protrusion 70 and a guide self-locking groove 71 that is movably connected to the guide self-locking protrusion 70. Both the guide self-locking protrusion 70 and the guide self-locking groove 71 are arc-shaped structures. The guide self-locking protrusion 70 is disposed on the inner wall of the first movable hinge block 5, and the guide self-locking groove 71 is disposed on the inner wall of the second movable hinge block 6 facing the inner wall of the first movable hinge block 5. The two ends of the guide self-locking protrusion 70 are respectively provided with a first protrusion 700 and a first groove 701, and the two ends of the guide self-locking groove 71 are respectively provided with a second protrusion 710 and a second groove 711. When the first movable hinge block 5 and the second movable hinge block 6 are parallel, the first protrusion 700 is engaged in the second groove 711, and the second protrusion 710 is engaged in the first groove 701. The first self-locking structure 7 is used to provide a first-level self-locking constraint, thereby ensuring the stability of the closing between the two connecting plates of the bracket when the first mounting bracket 2 and the second mounting bracket 3 are parallel.

[0022] The slot 60 is an arc-shaped slot. The pressure block assembly 40 is disposed on the outer wall of the second movable hinge block 6 via the rotating shaft 4. The pressure block assembly 40 includes a pressure block 400, an elastic element 401, and a nut 402. The rotating shaft 4 includes a first positioning connection part 41 connected to the positioning insertion hole 50, a rod part 42 for guiding the movement of the slot 60, a second positioning connection part 43 for positioning and fixing the elastic element 401, and a threaded part 44. The pressure block 400 and the elastic element 401 are disposed on the second positioning connection part 43. The nut 402 is disposed on the threaded part 44 and moves the elastic element 401 toward the outer wall of the second movable hinge block 6. The elastic element 401 presses the pressure block 400 against the outer wall of the second movable hinge block 6.

[0023] The second self-locking structure 8 includes at least one third protrusion 80 and at least one third groove 81. The third protrusion 80 is disposed on the inner wall of the pressure block 400, and the third groove 81 is disposed on the outer wall of the second movable hinge block 6. When the first movable hinge block 5 and the second movable hinge block 6 are parallel, the third protrusion 80 engages with the third groove 81 to form a self-locking mechanism. Both the third protrusion 80 and the third groove 81 are further provided with inclined surfaces 82. Preferably, there are two inclined surfaces 82, which are arranged in a mirror image on both sides of the third protrusion 80 and the third groove 81. Surface 82 is used to guide the flipping and opening action. Preferably, there are two third protrusions 80 and two third grooves 81. The two third protrusions 80 are arranged in a mirror image on the inner wall of the pressure block 400, and the two third grooves 81 are arranged in a mirror image on the outer wall of the second movable hinge block 6. The two third grooves 81 are located on the side of the slot 60 near the second mounting bracket 3. The second self-locking structure 8 is used to provide a second self-locking limit, thereby ensuring the stability of the closing between the two connecting plates of the bracket when the first mounting bracket 2 and the second mounting bracket 3 are parallel.

[0024] The elastic element 401 includes two oppositely arranged conical elastic washers, the arched portions of which are in contact with each other; a washer group is provided between the nut 402 and the conical elastic washers, the washer group including multiple washers, the elastic element 401 is used to allow the pressure block 400 to have a forward and backward movement space along the direction of the second positioning connection portion 43, and to ensure the fit between the pressure block 400 and the outer wall of the second movable hinge block 6.

[0025] The positioning insertion hole 50 includes a positioning hole and an insertion hole. The first positioning connecting part 41 includes a positioning part and an insertion rod part. The positioning part is inserted into the positioning hole and the insertion rod part is connected to the insertion hole. The pressure block 400 is a circular pressure block. The inner ring of the circular pressure block is provided with at least one positioning plane. The outer wall of the second positioning connecting part 43 is provided with at least one positioning plane. The positioning plane and the positioning plane cooperate to position the circular pressure block on the second positioning connecting part 43. Under the action of the elastic member 401, the pressure block 400 is always pressed towards the outer wall of the second movable hinge block 6, thereby ensuring that the third protrusion 80 on the pressure block 400 is engaged in the third groove 81, ensuring the stability of self-locking.

[0026] The outer ring of the guide self-locking protrusion 70 is provided with an arc-shaped guide groove 702, and the outer ring of the guide self-locking groove 71 is provided with an arc-shaped guide block 712 that rotates along the arc-shaped guide groove 702. The arc-shaped guide groove 702 and the arc-shaped guide block 712 are used to ensure the guidance of the first mounting frame 2 and the second mounting frame 3 when they are folded, thereby ensuring the stability of the operation.

[0027] The first protrusion 700, the first groove 701, the second protrusion 710, and the second groove 711 are all provided with inclined surfaces 72. The inclined surface 72 of the first protrusion 700 is located at the junction of the first protrusion 700 and the guide self-locking protrusion 70. The inclined surface 72 of the first groove 701 is located at the junction of the first groove 701 and the guide self-locking protrusion 70. The inclined surface 72 of the second protrusion 710 is located at the junction of the second protrusion 710 and the guide self-locking groove 71. The inclined surface 72 of the second groove 711 is located at the junction of the second groove 711 and the guide self-locking groove 71. The inclined surface 72 serves as a guide, that is, when the first mounting bracket 2 and the second mounting bracket 3 are parallel, the first protrusion 700 is engaged in the second groove 711, and the second protrusion 710 is engaged in the first groove 701, thereby ensuring the stability of the bracket when it is stored and closed.

[0028] Both the first mounting bracket 2 and the second mounting bracket 3 are plate structures. The first mounting bracket 2 and the second mounting bracket 3 are provided with mounting parts. Each mounting part is composed of multiple mounting holes. The mounting holes can be either through holes or countersunk holes. The mounting parts are also provided with positioning slot holes. The first mounting bracket 2 and the second mounting bracket 3 are respectively used for connection between the two folding plates.

[0029] This invention establishes a two-stage mechanical locking system by employing a first self-locking structure and a second self-locking structure. When the first and second mounting brackets are in a parallel closed state: the guide self-locking protrusion in the first self-locking structure interlocks with the first protrusion and second groove at both ends of the groove, achieving rigid engagement between the hinge blocks; simultaneously, the third protrusion in the second self-locking structure automatically engages with the third groove under the action of the elastic element, completing a secondary locking between the pressure block assembly and the second movable hinge block. This dual self-locking mechanism effectively prevents accidental opening of the equipment due to vibration, drops, or accidental contact while it is in its stored state, greatly improving safety and structural stability. During the closing process, the first protrusion and second groove, and the third protrusion and third groove, engage synchronously at specific positions, producing a distinct "click" sensation, providing the user with clear feedback that the device is fully closed; the inclined surface design also ensures that locking is only achieved when fully aligned, preventing partial or incomplete locking.

[0030] This utility model is not limited to the above-described embodiments. Other double self-locking hinges obtained by using the same or similar structures or devices as the above-described embodiments of this utility model are all within the protection scope of this utility model.

Claims

1. A double self-locking hinge, characterized in that: The double self-locking hinge includes a first mounting bracket, a second mounting bracket, and a rotating shaft. The first mounting bracket is provided with a first movable hinge block, and the second mounting bracket is provided with a second movable hinge block. The first movable hinge block is provided with a positioning hole for positioning and connecting the rotating shaft, and the second movable hinge block is provided with a slot that moves along an arc-shaped trajectory along the rotating shaft. A first self-locking structure is provided between the first movable hinge block and the second movable hinge block. The rotating shaft is provided with a pressure block assembly, and a second self-locking structure is provided between the second movable hinge block and the pressure block assembly.

2. The double self-locking hinge according to claim 1, characterized in that: The first self-locking structure includes a guide self-locking protrusion and a guide self-locking groove that is movably connected to the guide self-locking protrusion. Both the guide self-locking protrusion and the guide self-locking groove are arc structures. The guide self-locking protrusion is disposed on the inner wall of the first movable hinge block, and the guide self-locking groove is disposed on the inner wall of the second movable hinge block facing the inner wall of the first movable hinge block. The guide self-locking protrusion has a first protrusion and a first groove at both ends, and the guide self-locking groove has a second protrusion and a second groove at both ends; when the first movable hinge block and the second movable hinge block are parallel, the first protrusion is engaged in the second groove, and the second protrusion is engaged in the first groove.

3. The double self-locking hinge according to claim 2, characterized in that: The slot is an arc-shaped slot. The pressure block assembly is disposed on the outer wall of the second movable hinge block via the rotating shaft. The pressure block assembly includes a pressure block, an elastic element, and a nut. The rotating shaft includes a first positioning connection part connected to the positioning hole, a rod part for guiding the movement of the slot, a second positioning connection part for positioning and fixing the elastic element, and a threaded part. The pressure block and the elastic element are disposed on the second positioning connection part. The nut is disposed on the threaded part and moves the elastic element toward the outer wall of the second movable hinge block. The elastic element presses the pressure block against the outer wall of the second movable hinge block.

4. The double self-locking hinge according to claim 3, characterized in that: The second self-locking structure includes at least one third protrusion and at least one third groove. The third protrusion is disposed on the inner wall of the pressure block, and the third groove is disposed on the outer wall of the second movable hinge block. When the first movable hinge block and the second movable hinge block are parallel, the third protrusion is engaged in the third groove to form a self-locking mechanism.

5. The double self-locking hinge according to claim 4, characterized in that: The elastic element includes two oppositely arranged conical elastic washers, the arched portions of which are in contact with each other; a washer assembly is provided between the nut and the conical elastic washers.

6. The double self-locking hinge according to claim 3, characterized in that: The positioning socket includes a positioning hole and a insertion hole. The first positioning connection part includes a positioning part and a insertion rod part. The positioning part is inserted into the positioning hole and the insertion rod part is connected to the insertion hole.

7. The double self-locking hinge according to claim 4, characterized in that: The pressure block is a circular pressure block. The inner ring of the circular pressure block is provided with at least one positioning plane. The outer wall of the second positioning connection part is provided with at least one positioning plane. The positioning plane and the positioning plane cooperate to position the circular pressure block on the second positioning connection part.

8. The double self-locking hinge according to claim 2, characterized in that: The outer ring of the guide self-locking protrusion is provided with an arc-shaped guide groove, and the outer ring of the guide self-locking groove is provided with an arc-shaped guide block that rotates along the arc-shaped guide groove in an arc-shaped trajectory.

9. The double self-locking hinge according to claim 4, characterized in that: The first protrusion, the first groove, the second protrusion, and the second groove are all provided with inclined surfaces; the third protrusion and the third groove are also provided with an inclined surface.

10. The double self-locking hinge according to any one of claims 1-9, characterized in that: Both the first mounting bracket and the second mounting bracket are provided with mounting parts, and each mounting part is composed of multiple mounting holes.

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