A corner hinge

Abstract

The present invention relates to a corner hinge, comprising a connecting arm, an elastic member, a damping mechanism, and a hinge arm assembly. The connecting arm comprises a first arm body and a bent end. The front end of the first arm body is bent to form a bent end. An opening is provided between the first arm body and the bent end. A limiting mounting portion is provided between the first arm body, the bent end, and a receiving member. The receiving member is limited on the opening by the limiting mounting portion. The damping mechanism is slidably supported on the receiving member. One end of the damping mechanism acts on the bent end of the connecting arm through the receiving member. The structure of transmission contact between the damping mechanism and the elastic member is eliminated in the connecting arm of the corner hinge, so that during the hinge closing process, the receiving member supporting the damping mechanism directly generates elastic friction contact with the elastic member, thereby avoiding loss between hinge components, making the hinge opening and closing more stable, and reducing the installation space for installing the damping mechanism. The hinge has a more beautiful appearance, saving production costs, and extending the service life of the hinge, thereby avoiding the need to replace the hinge multiple times in the later stage.

Description

Technical Field

[0001] The present invention relates to the technical field of furniture hardware accessories, in particular to a corner hinge. Background Art

[0002] Chinese Patent No. 2020104093316 discloses an integrated optimized structure of a damping hinge, wherein the connecting arm is a straight arm, as shown in the accompanying drawings of the specification of the patent document. Figure 4 The damping mechanism is mounted on a connecting member. One end of the piston rod of the damping mechanism acts on the connecting member, which contacts the torsion spring to achieve elastic damping closing of the hinge. Because the connecting member contacts the torsion spring, a curved concave surface must be formed on the outside of the connecting member to correspond to the outer surface of the torsion spring. Therefore, the connecting member needs to be machined into a relatively smooth curved concave surface to avoid wear during elastic contact.

[0003] On the other hand, with the passage of time and the number of times the hinge is used, during the closing process of the hinge, the outer surface of the torsion spring always maintains contact with the arc-shaped concave surface of the receiving part due to the elastic action. After long-term use, the contact area between the receiving part and the torsion spring will always wear out.

[0004] In addition, the connecting arm of the corner hinge is not a straight arm, and its connecting arm part needs to be tilted toward the outside of the hinge. If the structure in which the damping mechanism and the elastic part are in transmission contact is applied to the corner hinge, the side damping mechanism needs to be installed vertically in the connecting arm. This causes the tilted part of the connecting arm to require more height space to accommodate the damping mechanism, resulting in an unsightly appearance of the hinge and high material costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a corner hinge, in which the structure of transmitting contact between the damping mechanism and the elastic part is eliminated in the connecting arm of the corner hinge, so as to avoid elastic friction contact between the receiving part supporting the damping mechanism and the elastic part during the closing process of the hinge, thereby avoiding loss between the hinge components, making the opening and closing of the hinge more stable, and reducing the installation space for installing the damping mechanism. The hinge has a more beautiful appearance, saves production costs, and extends the service life of the hinge, avoiding the need to replace the hinge multiple times in the future.

[0006] A corner hinge designed for this purpose includes a connecting arm, an elastic member, a damping mechanism, and a hinge arm assembly rotatably connected to the connecting arm. The connecting arm includes a first arm body and a bent end. One end of the elastic member acts on the bent end, and the other end of the elastic member acts on the hinge arm assembly. The front end of the first arm body is bent to form a bent end. An opening for accommodating and installing a receiving member is provided between the first arm body and the bent end. A limiting mounting portion is provided between the first arm body, the bent end, and the receiving member. The receiving member is limited to the opening between the first arm body and the bent end by the limiting mounting portion. The damping mechanism is slidably supported on the supporting part, and one end of the damping mechanism acts on the bent end of the connecting arm through the supporting part. The structure of transmission contact between the damping mechanism and the elastic part is eliminated in the connecting arm of the corner hinge, so that during the closing process of the hinge, the supporting part supporting the damping mechanism is prevented from directly generating elastic friction contact with the elastic part, thereby avoiding loss between the hinge components, making the hinge opening and closing more stable, and reducing the installation space for installing the damping mechanism. The hinge has a more beautiful appearance, saves production costs, and also extends the service life of the hinge, avoiding the need to replace the hinge multiple times in the future.

[0007] The damping mechanism, through a bearing, slides within the opening between the first arm and the bent end during the hinge's opening and closing process, preventing the damping mechanism from shifting during the hinge's opening and closing, which could lead to unstable hinge opening and closing. The damping mechanism acts on the hinge arm assembly when the hinge is closed, enabling the hinge to open elastically and close with a cushioned effect through the elastic member and damping mechanism.

[0008] The position-limiting mounting portion includes a directional mounting portion positioned between the first arm and the receiving member, and a positioning portion positioned between the bent end and the receiving member. The positioning portion and the directional mounting portion are spaced apart in a front-to-back or vertical relationship. The receiving member is positioned between the first arm and the bent end by the directional mounting portion and the positioning portion. The receiving member is fixedly mounted in the inner cavity of the connecting arm at two points, ensuring stable installation and simple assembly.

[0009] The first arm of the connecting arm is provided with a stopper top, which is spaced vertically from the receiving member. The damping mechanism is positioned between the stopper top and the receiving member. The damping mechanism is slidably supported on the receiving member, with the top of the damping mechanism stoppered on the stopper top of the connecting arm. During installation, the damping mechanism does not require additional fasteners to secure it, simplifying its installation structure and preventing it from shifting upward or downward during movement.

[0010] The position-limiting mounting portion further includes a first position-limiting side portion and a second position-limiting side portion disposed on the first arm body. The first position-limiting side portion and the second position-limiting side portion are spaced apart from each other, and the damping mechanism and the receiving member are positioned between the first position-limiting side portion and the second position-limiting side portion to prevent the damping mechanism and the receiving member from shifting left or right during the hinge opening and closing process or during the hinge transportation process.

[0011] A supporting surface is provided on the receiving part, the damping mechanism is positioned on the supporting surface, and a movable guide portion is provided between the damping mechanism and the supporting surface. The damping mechanism is slidingly supported on the receiving part through the movable guide portion. The damping mechanism slides on the receiving part through the front and rear limit of the movable guide portion. The sliding stroke of the damping mechanism is adjusted by setting the length of the movable guide portion.

[0012] The movable guide portion is a linear movable guide portion, so that the damping mechanism can move linearly during the opening and closing process of the hinge.

[0013] The first arm body is provided with a limiting top, a first limiting side, and a second limiting side. An opening is formed between the limiting top, the first limiting side, the second limiting side and the bent end of the first arm body, which partially covers or completely covers the damping mechanism and the receiving part, thereby preventing the damping mechanism and the receiving part from being exposed outside the connecting arm and affecting the appearance of the hinge.

[0014] A damping action part is provided between the hinge arm assembly and the damping mechanism. When the hinge is closed, the damping mechanism acts on the hinge arm assembly through the damping action part. During the opening and closing process of the hinge, when the damping mechanism moves in a limited position, the damping action part between the hinge arm assembly and the damping mechanism is engaged or separated.

[0015] The hinge arm assembly includes a first hinge arm, a support member is provided on the first hinge arm corresponding to the other end of the elastic member, an elastic limiting portion is provided on the support member, the other end of the elastic member is supported on the support member, and the other end of the elastic member is limited on the support member by the elastic limiting portion, so that the elastic member is positioned between the connecting arm and the hinge arm assembly during the opening and closing process of the hinge, preventing the elastic member from shifting left and right during the opening and closing process of the hinge, and avoiding unstable elastic opening and closing of the hinge.

[0016] The support member is rotatably arranged on the first hinge arm, and the other end of the elastic member forms rolling contact with the rotating support member during the opening and closing process of the hinge, thereby avoiding wear on the other end of the elastic member, reducing friction contact, and avoiding loud noise during the opening and closing process of the hinge.

[0017] The beneficial effects of the present invention are as follows:

[0018] The connecting arm of the corner hinge includes a first arm body and a bent end. An opening portion for accommodating and installing a receiving member is provided between the first arm body and the bent end. A limiting mounting portion is provided between the first arm body, the bent end and the receiving member. The receiving member is limited on the opening portion by the limiting mounting portion. The damping mechanism is slidably supported on the receiving member. One end of the damping mechanism acts on the bent end of the connecting arm through the receiving member. The structure of transmission contact between the damping mechanism and the elastic member is eliminated in the connecting arm of the corner hinge, and the structure that requires processing an arc-shaped recess on the receiving member is eliminated. Since the receiving member does not need to be in transmission contact with the torsion spring, the processing accuracy of the torsion spring can be appropriately reduced, the product qualification rate can be improved, and the receiving member supporting the damping mechanism is avoided from directly generating elastic friction contact with the elastic member during the closing process of the hinge, thereby avoiding loss between hinge components, making the hinge opening and closing more stable, and reducing the installation space for installing the damping mechanism. The hinge has a more beautiful appearance, saves production costs, and also extends the service life of the hinge, avoiding the need to replace the hinge multiple times in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the hinge in a closed state according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the hinge in the closed state according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of a damping mechanism installed inside a connecting arm according to an embodiment of the present invention.

[0022] Figure 4 This is a partial structural diagram of the damping mechanism according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the hinge assembly structure according to an embodiment of the present invention.

[0024] Figure 6 Schematic diagram of the structure of a receiving member according to an embodiment of the present invention.

[0025] Figure 7 This is a structural diagram of an embodiment of the present invention in which the damping mechanism and the hinge arm assembly are not in action.

[0026] Figure 8 This is a schematic structural diagram of a damping mechanism acting on a hinge arm assembly according to an embodiment of the present invention.

[0027] Figure 9 This is a structural schematic diagram of an embodiment of the present invention in which the other end of the elastic member is limited on the supporting member.

[0028] Figure 10 This is a schematic diagram of the assembly structure of the hinge, door panel and cabinet body according to an embodiment of the present invention.

[0029] Figure 11Schematic diagram of the structure of another connecting arm of a corner hinge according to an embodiment of the present invention.

[0030] Figure 12 Schematic diagram of the structure of another connecting arm of the corner hinge according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] See also Figures 1-12 A corner hinge comprises a connecting arm 1, an elastic member 5, a damping mechanism 7, and a hinge arm assembly 2 rotatably connected to the connecting arm 1. The connecting arm 1 comprises a first arm body 6 and a bent end 11. One end of the elastic member 5 acts on the bent end 11, and the other end of the elastic member 5 acts on the hinge arm assembly 2. The front end of the first arm body 6 is bent to form the bent end 11. An opening for accommodating and installing a receiving member 3 is provided between the first arm body 6 and the bent end 11. A limit mounting portion is provided between the first arm body 6, the bent end 11 and the receiving member 3. The connecting member 3 is limited to the opening between the first arm body 6 and the bent end 11 by the limiting mounting portion, and the damping mechanism 7 is slidably supported on the receiving member 3. One end of the damping mechanism 7 acts on the bent end 11 of the connecting arm 1 through the receiving member 3. The damping mechanism 7 is limited to slide on the opening between the first arm body 6 and the bent end 11 during the opening and closing process of the hinge through the receiving member 3, and the damping mechanism 7 acts on the hinge arm assembly 2 when the hinge is closed, so that the hinge can be elastically opened and buffered closed through the elastic member 5 and the damping mechanism 7.

[0033] The limiting mounting portion includes a directional mounting portion 10 arranged between the first arm body 6 and the receiving part 3, and a positioning portion 15 arranged between the bent end 11 and the receiving part 3. The positioning portion 15 and the directional mounting portion 10 are arranged in a front-to-back and or upper-lower interval. The receiving part 3 is positioned between the first arm body 6 and the bent end 11 through the directional mounting portion 10 and the positioning portion 15.

[0034] In this embodiment, the directional mounting portion 10 is a first axial hole arranged on the first arm body 6, and a second axial hole arranged on the receiving part 3. The first axial hole and the second axial hole are fixed to the first fixed fulcrum between the first arm body 6 and the bent end 11 by inserting a connecting shaft or a connecting pin.

[0035] In this embodiment, the positioning portion 15 is a positioning boss arranged on the inner side of the bent end 11, and the positioning portion 15 is a limiting step arranged on one end of the receiving member 3. The limiting step rests on the positioning boss, so that the receiving member 3 is fixed at the second fixed fulcrum between the first arm body 6 and the bent end 11.

[0036] The first arm body 6 of the connecting arm 1 is provided with a limiting top 16 , which is spaced apart from the receiving member 3 in an upper and lower direction, and the damping mechanism 7 is positioned between the limiting top 16 and the receiving member 3 .

[0037] The limiting mounting portion also includes a first limiting side portion 8 and a second limiting side portion 9 arranged on the first arm body 6. The first limiting side portion 8 and the second limiting side portion 9 are arranged at intervals on the left and right, and the damping mechanism 7 and the receiving part 3 are limited between the first limiting side portion 8 and the second limiting side portion 9.

[0038] In this embodiment, the specific setting structure of the damping mechanism 7 can be found in Chinese Patent No. 2020104093316, which discloses an integrated optimized structure of a damping hinge, and will not be described in detail here.

[0039] The receiving member 3 is provided with a supporting surface, the damping mechanism 7 is positioned on the supporting surface, and a movable guide portion 17 is provided between the damping mechanism 7 and the supporting surface. The damping mechanism 7 is slidably supported on the receiving member 3 through the movable guide portion 17 .

[0040] The movable guide portion 17 is a linear movable guide portion, so that the damping mechanism 7 can move linearly during the opening and closing process of the hinge.

[0041] In this embodiment, the movable guide portion 17 is a rectangular groove arranged on the supporting surface of the receiving member 3, and the movable guide portion 17 is a rectangular boss arranged on the bottom of the bracket of the damping mechanism 7. The rectangular boss is embedded in the rectangular groove, and the rectangular boss and the rectangular groove are clearance-fitted, so that the bracket of the damping mechanism 7 and the receiving member 3 have a sliding fit clearance.

[0042] In this embodiment, the damping mechanism 7 includes a bracket and a damper fixed to the bracket by a buckle. The damper is an elastic damper or a hydraulic damper. The damper includes a cylinder body and a piston rod telescopically arranged in the cylinder body. One end of the piston rod acts on the inner end surface of the receiving member 3. The outer end surface of the receiving member 3 contacts the bent end 11 of the connecting arm 1. The contact between the outer end surface of the receiving member 3 and the bent end 11 is an arc surface. When the hinge is opened and closed, the outer end surface of the receiving member 3 maintains contact with the bent end 11, and the transmission structure of the frictional contact between the elastic member and the outer end surface of the receiving member 3 is eliminated. The contact between the receiving member 3 and the bent end 11 is buffered by the damping mechanism, effectively buffering the impact force of the hinge closing.

[0043] The first arm body 6 is provided with a limiting top 16, a first limiting side 8, and a second limiting side 9. An opening portion that partially covers or completely covers the damping mechanism 7 and the receiving part 3 is formed between the limiting top 16, the first limiting side 8, the second limiting side 9 and the bent end 11 of the first arm body 6.

[0044] In this embodiment, an opening communicating with the inner cavity of the connecting arm 1 is provided at the bottom of the connecting arm 1 .

[0045] A damping action part 4 is provided between the hinge arm assembly 2 and the damping mechanism 7. When the hinge is closed, the damping mechanism 7 acts on the hinge arm assembly 2 through the damping action part 4. During the opening and closing process of the hinge, when the damping mechanism 7 moves in a limited position, the damping action part 4 between the hinge arm assembly 2 and the damping mechanism 7 is engaged or separated.

[0046] In this embodiment, the structure of the damping portion 4 is detailed in Chinese Patent No. 2020104093316, which discloses an integrated optimized structure of a damping hinge, and will not be described in detail here.

[0047] The hinge arm assembly 2 includes a first hinge arm 12, and a support member 13 is provided on the first hinge arm 12 corresponding to the other end of the elastic member 5, and an elastic limiting portion 14 is provided on the support member 13. The other end of the elastic member 5 is supported on the support member 13, and the other end of the elastic member 5 is limited on the support member 13 by the elastic limiting portion 14, so that the elastic member 5 is positioned between the connecting arm 1 and the hinge arm assembly 2 during the opening and closing process of the hinge.

[0048] In this embodiment, the first hinge arm 12 is located in the U-shaped inner cavity of the connecting arm 1, and the left and right side walls of the U-shaped inner cavity of the connecting arm 1 are provided with a first axial hole, the receiving part 3 is located in the U-shaped inner cavity of the connecting arm 1, and the left and right side walls of the receiving part 3 are provided with a second axial hole, and the first hinge arm 12 is provided with a third axial hole. The first axial hole, the second axial hole, and the third axial hole are connected by interlacing the rotating shaft.

[0049] In this embodiment, during the opening and closing process of the hinge, the receiving member 3 is fixed and the first hinge arm 12 is hinged along the rotation axis to open or close on the connecting arm 1.

[0050] In this embodiment, the hinge arm assembly 2 further includes a second hinge arm hinged to the hinge cup, one end of the second hinge arm is hinged to the first hinge arm 12, and the other end of the second hinge arm is hinged to the hinge cup.

[0051] The support member 13 is rotatably disposed on the first hinge arm 12 , and the other end of the elastic member 5 forms rolling contact with the rotating support member 13 during the opening and closing process of the hinge.

[0052] The support member 13 is rotatably mounted on the inner side of the first hinge arm 12 via a rivet. Alternatively, the rivet is rotatably mounted on the inner side of the first hinge arm 12, and the other end of the elastic member 5 is supported on the rivet head by increasing the outer diameter of the rivet head. The rivet head is provided with an elastic limiting portion 14 via metal processing.

[0053] In this embodiment, the axial end of the rivet is formed into a flanging edge through a flanging process to prevent the rivet from falling off the inner side of the first hinge arm 12 .

[0054] In this embodiment, the elastic member 5 is a torsion spring.

[0055] In this embodiment, the support member 13 is a roller, which is provided with an elastic stopper 14 having an arc-shaped concave surface. Alternatively, the elastic stopper 14 of the roller is a flat surface, with stopper surfaces extending upward from the flat surface at its left and right ends. The flat surface and the stopper surfaces at its left and right ends form the elastic stopper 14.

[0056] See also Figure 11 、 Figure 12 The connecting arm also includes a second arm body, and an angle A is formed between the first arm body 6 and the second arm body. By changing the angle A between the first arm body 6 and the second arm body, the closing angle of the hinge is changed.

[0057] In this embodiment, other connection structures of the corner hinge that are not described in detail can be found in Chinese Patent No. 2020104093316, which discloses an integrated optimized structure of a damping hinge, and will not be described in detail here.

[0058] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A corner hinge comprising a connecting arm (1), an elastic member (5), a damping mechanism (7), and a hinge arm assembly (2) rotatably connected to the connecting arm (1), characterized in that: The connecting arm (1) includes a first arm body (6) and a bent end (11), one end of the elastic member (5) acts on the bent end (11), and the other end of the elastic member (5) acts on the hinge arm assembly (2). The front end of the first arm body (6) is bent to form the bent end (11), and an opening for accommodating and installing the receiving member (3) is provided between the first arm body (6) and the bent end (11). A limiting installation portion is provided between the first arm body (6), the bent end (11) and the receiving member (3), and the receiving member (3) is limited by the limiting installation portion between the first arm body (6) and the bent end (11). The hinge is connected to the first arm body (6) and the first arm body (7). The hinge is connected to the first arm body (6) and the first arm body (1 ... The position-limiting mounting portion comprises a directional mounting portion (10) arranged between the first arm body (6) and the receiving member (3), and a positioning portion (15) arranged between the bent end (11) and the receiving member (3), wherein the positioning portion (15) and the directional mounting portion (10) are arranged in a front-to-back and / or upper-lower spacing, and the receiving member (3) is positioned between the first arm body (6) and the bent end (11) by the directional mounting portion (10) and the positioning portion (15); The first arm body (6) of the connecting arm (1) is provided with a limiting top (16), the limiting top (16) and the receiving member (3) are arranged with an upper and lower interval, and the damping mechanism (7) is positioned between the limiting top (16) and the receiving member (3).

2. The corner hinge according to claim 1, characterized in that: The limiting mounting portion further comprises a first limiting side portion (8) and a second limiting side portion (9) arranged on the first arm body (6); the first limiting side portion (8) and the second limiting side portion (9) are arranged at intervals on the left and right; the damping mechanism (7) and the receiving member (3) are limited between the first limiting side portion (8) and the second limiting side portion (9).

3. The corner hinge according to claim 1, characterized in that: A supporting surface is provided on the receiving member (3), the damping mechanism (7) is positioned on the supporting surface, and a movable guide portion (17) is provided between the damping mechanism (7) and the supporting surface. The damping mechanism (7) is slidably supported on the receiving member (3) via the movable guide portion (17).

4. The corner hinge according to claim 3, characterized in that: The movable guide portion (17) is a linear movable guide portion, so that the damping mechanism (7) can move linearly during the opening and closing process of the hinge.

5. The corner hinge according to claim 1, characterized in that: The first arm body (6) is provided with a limiting top (16), a first limiting side (8), and a second limiting side (9); an opening portion that partially covers or completely covers the damping mechanism (7) and the receiving member (3) is formed between the limiting top (16), the first limiting side (8), the second limiting side (9) and the bent end (11) of the first arm body (6).

6. The corner hinge according to claim 1, characterized in that: A damping action portion (4) is provided between the hinge arm assembly (2) and the damping mechanism (7); when the hinge is closed, the damping mechanism (7) acts on the hinge arm assembly (2) through the damping action portion (4); and during the hinge opening and closing process, when the damping mechanism (7) moves in a limiting manner, the damping action portion (4) between the hinge arm assembly (2) and the damping mechanism (7) engages or disengages.

7. The corner hinge according to claim 1, characterized in that: The hinge arm assembly (2) comprises a first hinge arm (12), a support member (13) is provided on the first hinge arm (12) corresponding to the other end of the elastic member (5), an elastic limiting portion (14) is provided on the support member (13), the other end of the elastic member (5) is supported on the support member (13), and the other end of the elastic member (5) is limited on the support member (13) by the elastic limiting portion (14), so that the elastic member (5) is positioned between the connecting arm (1) and the hinge arm assembly (2) during the opening and closing process of the hinge.

8. The corner hinge according to claim 7, characterized in that: The support member (13) is rotatably arranged on the first hinge arm (12), and the other end of the elastic member (5) forms rolling contact with the rotating support member (13) during the opening and closing process of the hinge.

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