Self-rebounding hinge structure

Abstract

The utility model discloses a self-rebounding hinge structure which is simpler in product assembly, more stable in structure and longer in service life. The self-rebounding hinge structure comprises a primary hinge, a secondary hinge, a torsion spring and a lock shaft. The primary hinge and the secondary hinge are respectively and relatively fixed with the door frame and the door leaf during installation; the torsion spring comprises two spiral sleeves which are coaxially arranged, a torsion spring shoulder connected between the two spiral sleeves, and a torsion spring arm connected with one spiral sleeve; the spiral sleeve, the torsional spring shoulder and the torsional spring arm are integrally formed; the primary hinge, the secondary hinge and the spiral sleeve are arranged on the lock shaft in a sleeving manner; the face, facing a user, of the self-rebounding hinge structure after installation is defined as the inner side, the torsion spring shoulder is located on the inner side of the child hinge and abuts against a door leaf, and the torsion spring arm and the inner side face of the mother hinge are relatively fixed.

Description

Technical Field

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

[0002] Some self-rebounding hinge products on the market are equipped with torsion springs, which can realize the rebound function, but it is more laborious to install. Because the two torsion spring arms of the existing self-rebounding hinges are fixed on the mother hinge and the child hinge respectively, the torsion spring is stretched or compressed through the relative rotation between the mother hinge and the child hinge, so that the torsion spring accumulates force. When the door leaf is not under force, it can make the door leaf rotate in the opposite direction to realize the operation of automatic closing or opening of the door; and during the installation process, the mother hinge and the child hinge need to be fixed at a certain angle relative to each other for assembly, which will inevitably cause stretching or compression of the torsion spring, and the torsion spring will produce a reaction force, which may pinch the installer and pose a safety hazard. At the same time, the torsion spring arm of the torsion spring is in point contact with the mother hinge and the child hinge, and the force is relatively concentrated, resulting in a shorter service life of the torsion spring. Utility Model Content

[0003] The purpose of the utility model is to provide a self-rebounding hinge structure to solve the problems existing in the prior art, so that the assembly of the product is simpler, the structure is more stable, and the service life is longer.

[0004] In order to achieve the above purpose, the solution of the utility model is:

[0005] A self-rebounding hinge structure comprises a mother hinge, a child hinge, a torsion spring and a lock shaft; the mother hinge and the child hinge are relatively fixed to a door frame and a door leaf respectively during installation; the torsion spring comprises two coaxially arranged spiral sleeves, a torsion spring shoulder connected between the two spiral sleeves, and a torsion spring arm connected to one of the spiral sleeves; the spiral sleeves, the torsion spring shoulder and the torsion spring arm are integrally formed; the mother hinge, the child hinge and the spiral sleeve are all sleeved on the lock shaft; it is defined that the side of the self-rebounding hinge structure that faces away from the user after installation is the inner side, the torsion spring shoulder is located on the inner side of the child hinge and abuts against the door leaf, and the torsion spring arm is relatively fixed to the inner side surface of the mother hinge.

[0006] The shafts of the mother hinge and the child hinge are respectively provided with a first notch and a second notch, and the two spiral sleeves of the torsion spring are respectively coaxially arranged in the first notch and the second notch.

[0007] Preferably, the self-rebounding hinge structure further comprises a screw; when installed, the sub-hinge is located above the mother hinge, and the screw is penetrated through the shaft of the sub-hinge along the radial direction of the lock shaft and abuts against the lock shaft.

[0008] The inner side surface of the female hinge is provided with a connecting portion with an opening, and the torsion spring arm is passed through the hole of the connecting portion and is provided with an anti-slip hook portion.

[0009] The number of turns of the spiral sleeve is at least two.

[0010] After adopting the above technical solution, the utility model has the following technical effects:

[0011] The two movable ends of the torsion spring of the utility model are a torsion spring shoulder and a torsion spring arm, wherein the torsion spring shoulder is no longer relatively fixed to the sub-hinge, but is arranged on the inner side of the sub-hinge and abuts against the door leaf, so that when the door is closed, the door leaf will push the torsion spring shoulder to rotate around the lock shaft to compress the torsion spring, and when the torsion spring is released, the function of automatic door opening can be realized, and it can be applied to doors with smaller space; secondly, because the torsion spring shoulder is no longer relatively fixed to the sub-hinge, the sub-hinge is no longer subjected to force during the installation process, and it is not easy to pinch the installer due to the elastic force of the torsion spring; at the same time, there is line contact between the torsion spring shoulder and the door leaf, the contact area is larger, and the structure of the torsion spring is more stable, which makes the product have a longer service life and can withstand more times of opening and closing the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an exploded view of a specific embodiment of the utility model;

[0013] Figure 2 This is a schematic diagram of the door opening state of a specific embodiment of the utility model;

[0014] Figure 3 This is a schematic diagram of an application scenario of a door opening state of a specific embodiment of the utility model;

[0015] Figure 4 This is a schematic diagram of a door closing state of a specific embodiment of the utility model;

[0016] Figure 5 This is a schematic diagram of an application scenario of a door closing state of a specific embodiment of the utility model;

[0017] Description of Figure Numbers:

[0018] 1-mother hinge; 11-first notch; 12-connecting part; 2-sub-hinge; 21-second notch; 3-torsion spring; 31-spiral sleeve; 32-torsion spring shoulder; 33-torsion spring arm; 331-hook; 4-locking shaft; 5-screw; a-door frame; b-door leaf. DETAILED DESCRIPTION

[0019] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0020] refer to Figures 1 to 5 As shown, the utility model discloses a self-rebound hinge structure, comprising a mother hinge 1, a sub-hinge 2, a torsion spring 3 and a lock shaft 4;

[0021] The main hinge 1 and the sub-hinge 2 are fixed relatively to the door frame a and the door leaf b respectively during installation;

[0022] The torsion spring 3 includes two coaxially arranged spiral sleeves 31, a torsion spring shoulder 32 connected between the two spiral sleeves 31, and a torsion spring arm 33 connected to one of the spiral sleeves 31; the spiral sleeve 31, the torsion spring shoulder 32 and the torsion spring arm 33 are integrally formed;

[0023] The mother hinge 1, the child hinge 2 and the spiral sleeve 31 are all sleeved on the lock shaft 4;

[0024] The side of the self-rebounding hinge structure facing away from the user after installation (i.e. the side that cannot be seen by the user after installation) is defined as the inner side. The torsion spring shoulder 32 is located on the inner side of the sub-hinge 2 and abuts against the door leaf b. The torsion spring arm 33 is relatively fixed to the inner side of the main hinge 1.

[0025] Through the above scheme, the two movable ends of the torsion spring 3 of the utility model are the torsion spring shoulder 32 and the torsion spring arm 33, wherein the torsion spring shoulder 32 is no longer fixed relative to the sub-hinge 2, but is arranged on the inner side of the sub-hinge 2 and abuts against the door leaf b, so that the door leaf b will push the torsion spring shoulder 32 to rotate around the lock shaft 4 in the closed state to achieve the compression of the torsion spring 3 (see Figure 4 and Figure 5 ), when the torsion spring 3 is released, the door can be opened automatically (see Figure 2 and Figure 3 ), it can be applied to doors with smaller spaces; secondly, because the torsion spring shoulder 32 is no longer relatively fixed to the sub-hinge 2, the sub-hinge 2 is no longer subjected to force during installation, and it is not easy for the installer to be pinched and injured by the elastic force of the torsion spring 3; at the same time, the torsion spring shoulder 32 and the door leaf b are in line contact, the contact area is larger, and the structure of the torsion spring 3 is more stable, which makes the product have a longer service life and can withstand more times of opening and closing the door.

[0026] Specific embodiments of the present utility model are shown below.

[0027] The shafts of the above-mentioned mother hinge 1 and the sub-hinge 2 are respectively provided with a first notch 11 and a second notch 21, and the two spiral sleeves 31 of the torsion spring 3 are respectively coaxially arranged in the first notch 11 and the second notch 21, so that the lock shaft 4 passes through the mother hinge 1, one of the spiral sleeves 31, the sub-hinge 2 and the other spiral sleeve 31 in sequence.

[0028] Furthermore, the utility model also includes a screw 5; when installing, the sub-hinge 2 is located above the mother hinge 1, and the screw 5 is penetrated through the shaft of the sub-hinge 2 along the radial direction of the lock shaft 4 and abuts against the lock shaft 4, so that the lock shaft 4 and the sub-hinge 2 are axially limited. Since the lower end of the lock shaft 4 penetrates the shaft of the mother hinge 1, the axial limit between the lock shaft 4 and the mother hinge 1 can also be guaranteed. This structure makes the assembly of the accessories of the self-rebound hinge itself simpler and faster, and it can be assembled without being assembled at the factory, but it can be installed together with the self-rebound hinge on the door frame a and the door leaf b, thereby reducing the manufacturer's cost.

[0029] The inner side surface of the female hinge 1 is provided with a connecting portion 12 with an opening, and the torsion spring arm 33 is passed through the hole of the connecting portion 12 and is provided with a hook portion 331 for preventing disengagement.

[0030] The number of turns of the spiral sleeve 31 is at least two.

[0031] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A self-rebound hinge structure, characterized in that: It includes a mother hinge, a sub-hinge, a torsion spring and a locking shaft; The mother hinge and the child hinge are fixed relative to the door frame and the door leaf respectively during installation; The torsion spring comprises two coaxially arranged spiral sleeves, a torsion spring shoulder connected between the two spiral sleeves, and a torsion spring arm connected to one of the spiral sleeves; the spiral sleeve, the torsion spring shoulder and the torsion spring arm are integrally formed; The mother hinge, the sub-hinge and the spiral sleeve are all sleeved on the lock shaft; The side of the self-rebounding hinge structure facing away from the user after installation is defined as the inner side, the torsion spring shoulder is located on the inner side of the sub-hinge and abuts against the door leaf, and the torsion spring arm is relatively fixed to the inner side surface of the main hinge.

2. The self-rebound hinge structure according to claim 1, characterized in that: The shafts of the mother hinge and the child hinge are respectively provided with a first notch and a second notch, and the two spiral sleeves of the torsion spring are respectively coaxially arranged in the first notch and the second notch.

3. The self-rebound hinge structure according to claim 2, characterized in that: It also includes screws; when installed, the sub-hinge is located above the mother hinge, and the screws penetrate the shaft of the sub-hinge along the radial direction of the lock shaft and abut against the lock shaft.

4. The self-rebound hinge structure according to claim 1, characterized in that: The inner side surface of the female hinge is provided with a connecting portion with an opening, and the torsion spring arm is passed through the hole of the connecting portion and is provided with an anti-slip hook portion.

5. The self-rebound hinge structure according to claim 1, characterized in that: The number of turns of the spiral sleeve is at least two.

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