Large-angle compact hinge

Abstract

The utility model belongs to the technical field of hinges, and discloses a large-angle compact type hinge which comprises a hinge cup, a connecting arm assembly; the elastic structure comprises a torsional spring and a pressing sheet; the torsional spring comprises a spiral main body and an extending end which are connected with each other; a first arc-shaped part matched with the extending end of the torsional spring is arranged on the first connecting arm; the pressing piece comprises a first part and a second part which are connected with each other, the first part of the pressing piece covers the extending end of the torsional spring, the second part of the pressing piece extends in the direction of the spiral body of the torsional spring, and the first arc-shaped part abuts against the first part of the pressing piece. According to the large-angle compact type hinge, the torsion spring is adopted for providing elastic force, and the torsion spring can be installed in a narrow space, so that the large-angle compact type hinge can be opened and closed at a larger angle; the contact area between the first connecting arm and the extending end of the torsion spring is increased through the pressing piece, and the pressing piece plays a role in reinforcing, supporting and protecting the extending end of the torsion spring and the spiral body of the torsion spring.

Description

Technical Field

[0001] The utility model relates to the technical field of hinges, in particular to a large-angle compact hinge. Background Art

[0002] A hinge is a mechanical device used to connect two solids and allow relative rotation between them. A hinge can be composed of movable components or made of foldable materials, and is often used to open and close cabinet doors.

[0003] Chinese Patent CN207999153U discloses a large-angle door hinge, which is provided with an elastic structure to assist the opening and closing of the door. The elastic structure includes a spring and a stop block. The spring is arranged on the mounting seat, and the stop block is arranged at the left end of the spring. The stop block abuts against the right end of the swing arm. It can be seen from the attached drawings that this technical solution uses a straight cylindrical spring. The straight cylindrical spring has a certain length and occupies a large space, thus affecting the opening and closing angle of the large-angle door hinge and limiting its opening and closing angle; during the opening and closing process of the large-angle door hinge, the swing arm swings. Since the swing arm always abuts against the stop block during the swinging process, the swing arm is offset to the side of the straight cylindrical spring, resulting in uneven stress on the straight cylindrical spring and affecting its service life. Moreover, the stop block is arranged at the left end of the spring, which can only increase the contact area between the spring and the swing arm and cannot support the spring. To avoid deformation of the spring, a receiving groove needs to be separately provided on the mounting seat. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned defects of the prior art, the utility model provides a large-angle compact hinge, which uses a torsion spring to provide elastic force for the large-angle compact hinge. Since the torsion spring can be installed in a relatively narrow space, the large-angle compact hinge can achieve a larger opening and closing angle; a pressing piece is used to increase the contact area between the first connecting arm and the extending end of the torsion spring, and the pressing piece plays a role in strengthening, supporting and protecting the extending end of the torsion spring and the spiral body of the torsion spring.

[0005] The technical solution adopted by the utility model to solve its problems is as follows:

[0006] A large-angle compact hinge includes:

[0007] A hinge cup;

[0008] A connecting arm assembly, which includes a first connecting arm, a second connecting arm and a seat body. One end of the first connecting arm is rotatably connected to the hinge cup, the other end of the first connecting arm is rotatably connected to one end of the second connecting arm, and the other end of the second connecting arm is rotatably connected to the seat body;

[0009] An elastic structure, which is arranged on the second connecting arm and includes a torsion spring and a pressing piece;

[0010] The torsion spring includes a helical body and an extension end that are connected to each other. A first arc portion for cooperating with the extension end of the torsion spring is provided on the first connecting arm.

[0011] The pressing piece includes a first part and a second part that are connected to each other. The first part of the pressing piece covers the extension end of the torsion spring, the second part of the pressing piece extends along the direction of the helical body of the torsion spring, and the first arc portion abuts against the first part of the pressing piece.

[0012] In a preferred embodiment, the pressing piece further includes a third part. The third part of the pressing piece extends along the side of the extension end of the torsion spring, and the third parts of the pressing piece are provided on both sides of the extension end of the torsion spring.

[0013] In a preferred embodiment, the pressing piece is a metal piece.

[0014] In a preferred embodiment, the large-angle compact hinge further includes a mounting seat. The mounting seat is provided on the second connecting arm, the helical body of the torsion spring is provided on the mounting seat, and the extension end of the torsion spring extends out of the mounting seat.

[0015] In a preferred embodiment, the connecting arm assembly further includes a third connecting arm and a fourth connecting arm. One end of the third connecting arm is rotatably connected to the hinge cup, the other end of the third connecting arm is rotatably connected to one end of the fourth connecting arm, and the other end of the fourth connecting arm is rotatably connected to the seat body.

[0016] The middle part of the second connecting arm is rotatably connected to the middle part of the third connecting arm.

[0017] In a preferred embodiment, the large-angle compact hinge further includes a first pin shaft, a second pin shaft, a third pin shaft, a fourth pin shaft, a fifth pin shaft, a sixth pin shaft, and a seventh pin shaft.

[0018] One end of the first connecting arm is rotatably connected to the hinge cup through the first pin shaft, the other end of the first connecting arm is rotatably connected to one end of the second connecting arm through the second pin shaft, and the other end of the second connecting arm is rotatably connected to the seat body through the third pin shaft.

[0019] One end of the third connecting arm is rotatably connected to the hinge cup through the fourth pin shaft, the other end of the third connecting arm is rotatably connected to one end of the fourth connecting arm through the fifth pin shaft, and the other end of the fourth connecting arm is rotatably connected to the seat body through the sixth pin shaft.

[0020] The middle part of the second connecting arm is rotatably connected to the middle part of the third connecting arm through the seventh pin shaft.

[0021] In a preferred embodiment, the large-angle compact hinge further includes a pressing arm and an eighth pin shaft. One end of the pressing arm is connected to the first connecting arm through the eighth pin shaft, and the other end of the pressing arm is connected to the first connecting arm through the second pin shaft.

[0022] The pressing arm includes a first arc portion.

[0023] In a preferred embodiment, the torsion spring is arranged between the second pin shaft and the seventh pin shaft.

[0024] In a preferred embodiment, the large-angle compact hinge further includes a damper which is arranged on the mounting seat. The pressing arm further includes a second arc portion which is used for abutting against the end portion of the damper.

[0025] In a preferred embodiment, both the third connecting arm and the fourth connecting arm are arranged outside the first connecting arm and the second connecting arm.

[0026] In summary, the utility model has the following technical effects: The utility model uses a torsion spring to provide elastic force. Since the torsion spring can be installed in a relatively narrow space, the large-angle compact hinge can achieve opening and closing at a larger angle. The pressing piece is used to increase the contact area between the first connecting arm and the extending end of the torsion spring, and the pressing piece plays a role in strengthening, supporting and protecting both the extending end of the torsion spring and the spiral body of the torsion spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the external structure of the first state of the embodiment of the utility model;

[0028] Figure 2 is a schematic diagram of the internal structure of the first state of the embodiment of the utility model;

[0029] Figure 3 is a schematic diagram of the external structure of the second state of the embodiment of the utility model;

[0030] Figure 4 is a schematic diagram of the internal structure of the second state of the embodiment of the utility model;

[0031] Figure 5 is a schematic diagram of the external structure of the third state of the embodiment of the utility model;

[0032] Figure 6 is a schematic diagram of the internal structure of the third state of the embodiment of the utility model;

[0033] Figure 7 is for the embodiment of the utility model Figure 5 exploded structure schematic diagram;

[0034] Figure 8 is a schematic diagram of the structure of the pressing piece of the embodiment of the utility model.

[0035] Among them, the meanings of the reference numerals are as follows:

[0036] 10. Hinge cup, 20. Link arm assembly, 201. First link arm, 202. Second link arm, 203. Seat body, 204. Third link arm, 205. Fourth link arm, 206. First pin shaft, 207. Second pin shaft, 208. Third pin shaft, 209. Fourth pin shaft, 210. Fifth pin shaft, 211. Sixth pin shaft, 212. Seventh pin shaft, 213. Pressing arm, 2131. First arc portion, 2132. Second arc portion, 214. Eighth pin shaft, 30. Elastic structure, 301. Torsion spring, 3011. Spiral main body, 3012. Extended end, 302. Pressing plate, 3021. First part, 3022. Second part, 3023. Third part, 40. Mounting seat, 50. Damper. Detailed implementation mode

[0037] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0040] Refer to Figures 1-8, A large-angle compact hinge, comprising: a hinge cup 10; a connecting arm assembly 20, the connecting arm assembly 20 includes a first connecting arm 201, a second connecting arm 202 and a seat body 203, one end of the first connecting arm 201 is rotatably connected to the hinge cup 10, the other end of the first connecting arm 201 is rotatably connected to one end of the second connecting arm 202, and the other end of the second connecting arm 202 is rotatably connected to the seat body 203; an elastic structure 30, the elastic structure 30 is arranged on the second connecting arm 202, and the elastic structure 30 includes a torsion spring 301 and a pressing piece 302; the torsion spring 301 includes a spiral main body 3011 and an extending end 3012 connected to each other, and a first arc portion 2131 for cooperating with the extending end 3012 of the torsion spring 301 is arranged on the first connecting arm 201; the pressing piece 302 includes a first portion 3021 and a second portion 3022 connected to each other, the first portion 3021 of the pressing piece 302 covers the extending end 3012 of the torsion spring 301, the second portion 3022 of the pressing piece 302 extends along the direction of the spiral main body 3011 of the torsion spring 301, and the first arc portion 2131 abuts against the first portion 3021 of the pressing piece 302.

[0041] The utility model uses the torsion spring 301 to provide elasticity. Since the torsion spring 301 can be installed in a relatively narrow space, the large-angle compact hinge can achieve opening and closing at a larger angle; the pressing piece 302 is used to increase the contact area between the first connecting arm 201 and the extending end 3012 of the torsion spring 301, and the pressing piece 302 plays a role in strengthening, supporting and protecting both the extending end 3012 of the torsion spring 301 and the spiral main body 3011 of the torsion spring 301.

[0042] In an embodiment of the utility model, the pressing piece 302 further includes a third portion 3023, the third portion 3023 of the pressing piece 302 extends along the side of the extending end 3012 of the torsion spring 301, and the third portion 3023 of the pressing piece 302 is arranged on both sides of the extending end 3012 of the torsion spring 301; the pressing piece 302 limits the axial two sides of the torsion spring 301 through its third portion 3023.

[0043] In an embodiment of the utility model, the pressing piece 302 is a metal sheet. Preferably, the pressing piece 302 is a thin metal sheet, and the second portion 3022 of the pressing piece 302 is arc-shaped, so that the pressing piece 302 as a whole has elasticity, and the elasticity of the pressing piece 302 corresponds to the elasticity of the torsion spring 301.

[0044] In an embodiment of the utility model, the large-angle compact hinge further includes a mounting seat 40, the mounting seat 40 is arranged on the second connecting arm 202, the spiral main body 3011 of the torsion spring 301 is arranged on the mounting seat 40, and the extending end 3012 of the torsion spring 301 extends out of the mounting seat 40.

[0045] It should be noted that the mounting base 40 is connected and fixed to the second connecting arm 202, and the connection manner between the mounting base 40 and the second connecting arm 202 is such that the elastic structure 30 can always be in contact with the first connecting arm 201.

[0046] Specifically, the torsion spring 301 can be connected to the mounting base 40 by means such as welding, bonding, screw connection, etc., and the installation of the torsion spring 301 is such that it can be in contact with the first connecting arm 201 to provide elastic force.

[0047] In the embodiment of the present utility model, the connecting arm assembly 20 further includes a third connecting arm 204 and a fourth connecting arm 205. One end of the third connecting arm 204 is rotatably connected to the hinge cup 10, the other end of the third connecting arm 204 is rotatably connected to one end of the fourth connecting arm 205, and the other end of the fourth connecting arm 205 is rotatably connected to the seat body 203; the middle part of the second connecting arm 202 is rotatably connected to the middle part of the third connecting arm 204.

[0048] In the embodiment of the present utility model, the large-angle compact hinge further includes a first pin shaft 206, a second pin shaft 207, a third pin shaft 208, a fourth pin shaft 209, a fifth pin shaft 210, a sixth pin shaft 211, and a seventh pin shaft 212; one end of the first connecting arm 201 is rotatably connected to the hinge cup 10 through the first pin shaft 206, and the other end of the first connecting arm 201 is rotatably connected to one end of the second connecting arm 202 through the second pin shaft 207, and the other end of the second connecting arm 202 is rotatably connected to the seat body 203 through the third pin shaft 208; one end of the third connecting arm 204 is rotatably connected to the hinge cup 10 through the fourth pin shaft 209, the other end of the third connecting arm 204 is rotatably connected to one end of the fourth connecting arm 205 through the fifth pin shaft 210, and the other end of the fourth connecting arm 205 is rotatably connected to the seat body 203 through the sixth pin shaft 211; the middle part of the second connecting arm 202 is rotatably connected to the middle part of the third connecting arm 204 through the seventh pin shaft 212.

[0049] In the embodiment of the present utility model, the large-angle compact hinge further includes a pressing arm 213 and an eighth pin shaft 214. One end of the pressing arm 213 is connected to the first connecting arm 201 through the eighth pin shaft 214, and the other end of the pressing arm 213 is connected to the first connecting arm 201 through the second pin shaft 207; the pressing arm 213 includes a first arc portion 2131.

[0050] It should be noted that the first arc portion 2131 and the first connecting arm 201 are integrally formed or separately formed. When they are separately formed, the first arc portion 2131 is integrated on the pressing arm 213. That is, after the first connecting arm 201 and the pressing arm 213 are separately formed, the pressing arm 213 is installed on the first connecting arm 201. In this way, the manufacturing difficulty of the first connecting arm 201 is reduced.

[0051] In the embodiment of the present utility model, the torsion spring 301 is arranged between the second pin shaft 207 and the seventh pin shaft 212.

[0052] In the embodiment of the present utility model, the large-angle compact hinge further includes a damper 50. The damper 50 is arranged on the mounting seat 40. The pressing arm 213 further includes a second arc portion 2132, and the second arc portion 2132 is used to abut against the end of the damper 50.

[0053] Preferably, the damper 50 can be a hydraulic cylinder. The damper 50 provides a buffering function when the hinge is closed, and maximally reduces the noise generated by the collision between the cabinet door and the cabinet body when the hinge is closed.

[0054] It should be noted that the damper 50 is fixed on the mounting seat 40. The installation of the damper 50 is based on the ability to achieve the buffering function of the damper 50 for the large-angle compact hinge, and the installation method of the prior art can be used for implementation, which will not be elaborated here.

[0055] In the embodiment of the present utility model, both the third connecting arm 204 and the fourth connecting arm 205 are arranged outside the first connecting arm 201 and the second connecting arm 202, so as to realize the stable operation of the connecting arm assembly 20 and avoid interference between the various components of the connecting arm assembly 20.

[0056] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present utility model.

Claims

1. A large-angle compact hinge, characterized in that, Comprising: Hinge cup; Link arm assembly, the link arm assembly includes a first link arm, a second link arm and a seat body, one end of the first link arm is rotatably connected to the hinge cup, the other end of the first link arm is rotatably connected to one end of the second link arm, and the other end of the second link arm is rotatably connected to the seat body; Elastic structure, the elastic structure is arranged on the second link arm, and the elastic structure includes a torsion spring and a pressing piece; The torsion spring includes a helical body and an extending end connected to each other, and a first arc portion for cooperating with the extending end of the torsion spring is arranged on the first link arm; The pressing piece includes a first part and a second part connected to each other, the first part of the pressing piece covers the extending end of the torsion spring, the second part of the pressing piece extends along the direction of the helical body of the torsion spring, and the first arc portion abuts against the first part of the pressing piece.

2. The large-angle compact hinge according to claim 1, wherein: The pressing piece further includes a third part, the third part of the pressing piece extends along the side of the extending end of the torsion spring, and the third part of the pressing piece is arranged on both sides of the extending end of the torsion spring.

3. The large-angle compact hinge according to claim 1, wherein: The pressing piece is a metal sheet.

4. The large-angle compact hinge according to claim 1, wherein: It further includes a mounting seat, the mounting seat is arranged on the second link arm, the helical body of the torsion spring is arranged on the mounting seat, and the extending end of the torsion spring extends out of the mounting seat.

5. The large-angle compact hinge according to claim 4, characterized in that: The link arm assembly further includes a third link arm and a fourth link arm, one end of the third link arm is rotatably connected to the hinge cup, the other end of the third link arm is rotatably connected to one end of the fourth link arm, and the other end of the fourth link arm is rotatably connected to the seat body; The middle part of the second link arm is rotatably connected to the middle part of the third link arm.

6. The large-angle compact hinge according to claim 5, characterized in that: It further includes a first pin shaft, a second pin shaft, a third pin shaft, a fourth pin shaft, a fifth pin shaft, a sixth pin shaft and a seventh pin shaft; One end of the first link arm is rotatably connected to the hinge cup through the first pin shaft, the other end of the first link arm is rotatably connected to one end of the second link arm through the second pin shaft, and the other end of the second link arm is rotatably connected to the seat body through the third pin shaft; One end of the third link arm is rotatably connected to the hinge cup through the fourth pin shaft, the other end of the third link arm is rotatably connected to one end of the fourth link arm through the fifth pin shaft, and the other end of the fourth link arm is rotatably connected to the seat body through the sixth pin shaft; The middle part of the second link arm is rotatably connected to the middle part of the third link arm through the seventh pin shaft.

7. The large-angle compact hinge according to claim 6, characterized in that: It further includes a pressing arm and an eighth pin shaft, one end of the pressing arm is connected to the first link arm through the eighth pin shaft, and the other end of the pressing arm is connected to the first link arm through the second pin shaft; The pressing arm includes the first arc portion.

8. The large-angle compact hinge according to claim 6, wherein: The torsion spring is arranged between the second pin shaft and the seventh pin shaft.

9. The large-angle compact hinge according to claim 7, wherein: It further includes a damper, the damper is arranged on the mounting seat, the pressing arm further includes a second arc portion, and the second arc portion is used to abut against the end of the damper.

10. The large-angle compact hinge according to claim 5, characterized in that: The third link arm and the fourth link arm are both arranged outside the first link arm and the second link arm.

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