CN117090464A

CN117090464A - Multi-joint self-closing hinge

Info

Publication number: CN117090464A
Application number: CN202311048389.2A
Authority: CN
Inventors: 张海文; 许兴隆; 邹莲; 季强
Original assignee: Wuxi Haidaer Precision Slides Co ltd
Current assignee: Wuxi Haidaer Precision Slides Co ltd
Priority date: 2023-04-27
Filing date: 2023-08-18
Publication date: 2023-11-21

Abstract

The application discloses a multi-joint self-closing hinge, which belongs to the field of hinges, wherein when the multi-joint self-closing hinge is in a fully opened state, an elastic component is locked with a second connecting piece and is in a compressed state; when the multi-movable joint self-closing hinge is in a first critical state, the elastic component and the second connecting piece are unlocked, the elastic component is restored to deform and is abutted against the door body fixing seat and rotates around the door body fixing seat, the elastic force of the elastic component drives the multi-movable joint self-closing hinge to move towards a closed state, so that when the door body is in a fully opened state, the elastic component does not apply closing acting force to the door body, and a user can conveniently take and put east and west; when the door body rotates through the first critical state, the elastic component applies closing acting force to the door body, so that the door body and the cabinet body are finally and completely closed.

Description

Multi-joint self-closing hinge

Technical Field

The present application relates to hinges, and more particularly to a multi-articulated self-closing hinge.

Background

In general, in order to ensure thermal insulation performance of a refrigerator, a door body is thicker, which requires a hinge connected between the door body and the refrigerator cabinet to have a larger opening degree so as to avoid interference between the door body and the refrigerator cabinet during opening/closing, and particularly, as embedded integrated refrigerators are increasingly popular, the door body of the refrigerator needs to be assembled to a cabinet door plate, which further increases the thickness of the whole door body, and the hinge is required to have a larger opening degree.

The chinese patent publication No. CN101111655B discloses a multi-joint hinge, in which a first fixing element is fixed to a furniture body, a second fixing element is fixed to a door, two fixing elements are connected to each other via a plurality of levers, and two fixing elements are connected to each other via a plurality of levers, wherein the scissor-like hinge via each lever can meet the requirement of a large opening, open a thicker door, and in order to pretension the multi-joint hinge to a closed position, a spring is provided, and the hinge is always in a tensioned state during closing, which results in an uncontrolled and rapid closing of the door under the action of the hinge, thereby bringing about a safety hazard.

The Chinese patent publication No. CN112292500B discloses a furniture deceleration hinge, which adopts a deceleration device to reduce the speed of the door when the door is closed, but the door is in a completely opened state and tends to be closed by the elasticity of a spring, and can not be kept in an opened state under the condition of no external force, so that a user can take and put east and west conveniently.

Disclosure of Invention

In order to overcome the defects in the prior art, one of the purposes of the application is to provide a device which can keep an open state when being completely opened, and is convenient for a user to take and put east and west; the multi-joint self-closing hinge can be preloaded to a closing position when the door body and the cabinet body are closed, so that the door body and the cabinet body cannot be completely closed.

One of the purposes of the application is realized by adopting the following technical scheme:

a multi-joint self-closing hinge comprises a cabinet body fixing seat, a door body fixing seat, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and an elastic component,

the two ends of the first connecting piece are respectively connected with the cabinet body fixing seat and the second connecting piece in a rotating way, the two ends of the second connecting piece are respectively connected with the first connecting piece and the door body fixing seat in a rotating way, the two ends of the third connecting piece are respectively connected with the cabinet body fixing seat and the fourth connecting piece in a rotating way, the two ends of the fourth connecting piece are respectively connected with the first connecting piece and the door body fixing seat in a rotating way, and the elastic component is rotatably arranged on the second connecting piece;

when the multi-joint self-closing hinge is in a fully open state, the elastic assembly is locked with the second connector and the elastic assembly is in a compressed state;

when the multi-joint self-closing hinge is in a first critical state, the elastic component and the second connecting piece are unlocked, the elastic component recovers deformation, is abutted to the door body fixing seat and rotates around the door body fixing seat, and the elastic force of the elastic component drives the multi-joint self-closing hinge to move towards a closed state.

Further, the elastic component is provided with a matching surface, the door body fixing seat comprises a supporting shaft, when the multi-joint self-closing hinge is in a first critical state, the matching surface is abutted to the supporting shaft, and the elastic component rotates around the supporting shaft.

Further, the elastic component includes fastener, elastic component, trigger piece and connecting axle, the fastener pass through the connecting axle rotate install in the second connecting piece, the elastic component both ends respectively with the fastener with the trigger piece is contradicted, the fastener with the trigger piece is pegged graft, when many movable joints are from the closed hinge in the state of opening completely, the trigger piece with the second connecting piece locks, the mating surface set up in on the trigger piece.

Further, the triggering piece comprises a clamping block, the second connecting piece is provided with a clamping hole, when the multi-joint self-closing hinge is in a completely opened state, the clamping block is positioned in the clamping hole, and when the multi-joint self-closing hinge is in a first critical state, the clamping block is separated from the clamping hole.

Further, the trigger piece comprises a clamping shaft, the second connecting piece is provided with a clamping groove, the clamping shaft is positioned in the clamping groove when the multi-joint self-closing hinge is in a completely opened state, and the clamping shaft is separated from the clamping groove when the multi-joint self-closing hinge is in a first critical state.

Further, the trigger piece is provided with a plugging groove, the tail end of the plugging groove is provided with a stop block, the buckle piece comprises a plugging arm, the end part of the plugging arm is provided with a buckle bulge, the plugging arm is positioned in the plugging groove, when the multi-movable joint self-closing hinge is in a completely opened state, the plugging arm is plugged in the plugging groove, when the multi-movable joint self-closing hinge is in a first critical state, the plugging groove moves relative to the plugging arm until the buckle bulge is in contact with the stop block.

Further, the second connecting piece comprises two side plates and a connecting plate connected with the two side plates, an accommodating space is formed between the two side plates, and the elastic component is located in the accommodating space.

Further, the fourth connecting piece is provided with a third hinge hole, a fourth hinge hole and a fifth hinge hole, the fourth connecting piece is rotationally connected with the first connecting piece through the third hinge hole, the fourth connecting piece is rotationally connected with the third connecting piece through the fourth hinge hole, the fourth connecting piece is rotationally connected with the door body fixing seat through the fifth hinge hole, and the fourth hinge hole is located between the third hinge hole and the fifth hinge hole.

Further, the fourth link includes a push plate, the multi-joint self-closing hinge further includes a deceleration assembly, and the push plate interferes with the deceleration assembly when the multi-joint self-closing hinge is in the second threshold state.

Further, the speed reducing assembly comprises a stop piece, a damping sleeve and a damping rod, wherein the damping rod is installed on the damping sleeve, the top end of the damping rod is connected with the stop piece, the stop piece is provided with an abutting surface, when the multi-movable joint self-closing hinge is in a completely opened state and a first critical state, the push plate is separated from the abutting surface, and when the multi-movable joint self-closing hinge is in a second critical state, the push plate is abutted to the abutting surface.

Further, the deceleration assembly is mounted within the first link.

Further, the stop piece is provided with a limiting groove, the first connecting piece comprises a limiting protrusion, and the limiting protrusion is located in the limiting groove.

Further, when the multi-joint self-closing hinge is in a completely opened state, the cabinet body fixing seat and the door body fixing seat form an obtuse included angle.

Further, when the multi-joint self-closing hinge is in a fully closed state, the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are contained between the cabinet body fixing seat and the door body fixing seat, and the bottom of the cabinet body fixing seat is parallel to the top of the door body fixing seat.

Compared with the prior art, the multi-joint self-closing hinge has the following advantages:

(1) Since the multi-joint self-closing hinge is in the fully open state, the elastic assembly is locked with the second connector and the elastic assembly is in the compressed state; when the multi-movable joint self-closing hinge is in a first critical state, the elastic component and the second connecting piece are unlocked, the elastic component is restored to deform and is abutted against the door body fixing seat and rotates around the door body fixing seat, the elastic force of the elastic component drives the multi-movable joint self-closing hinge to move towards a closed state, so that when the door body is in a completely opened state, the elastic component does not apply closing acting force to the door body, the impact risk to a user caused by automatic closing of the door body can be effectively avoided, the use safety is improved, and meanwhile, the user is convenient to take and put east and west; when the door body rotates through the first critical state, the elastic component applies closing acting force to the door body, so that the door body and the cabinet body are finally and completely closed.

(2) The multi-joint self-closing hinge further comprises a speed reducing assembly, when the door body rotates through the second critical state, the push plate is in conflict with the speed reducing assembly, so that the closing speed of the door body is reduced, and the closing safety of the door body is improved.

(3) The structural design of the multi-joint self-closing hinge enables the hinge to have larger opening degree when being opened, and is applicable to different use scenes; when the hinge is closed, the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are contained between the cabinet body fixing seat and the door body fixing seat, so that the hinge is small in size and does not occupy space.

(4) The first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are of double-sided board structures, the multi-joint self-closing hinge is in the closing or opening process, the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are located at different positions and form different gaps, and at the moment, the double-sided board structures of the connecting pieces play a role in protecting other parts.

Drawings

FIG. 1 is a perspective view of the multi-joint self-closing hinge of the present application in a fully open state;

FIG. 2 is a perspective cross-sectional view of the multi-joint self-closing hinge of FIG. 1 in a fully open state;

FIG. 3 is a perspective view of a second connector of the multi-joint self-closing hinge of FIG. 1;

FIG. 4 is a perspective view of the spring assembly of the multi-joint self-closing hinge of FIG. 2;

FIG. 5 is an exploded view of the spring assembly of FIG. 4;

FIG. 6 is a perspective view of the deceleration assembly of the multi-joint self-closing hinge of FIG. 2;

FIG. 7 is a perspective view of the multi-joint self-closing hinge of FIG. 1 in a first threshold state;

FIG. 8 is a perspective cross-sectional view of the multi-joint self-closing hinge of FIG. 1 in a second threshold state;

fig. 9 is a perspective view of the multi-joint self-closing hinge of fig. 1 in a fully closed state.

In the figure: 10. a cabinet fixing seat; 11. a receiving groove; 20. a door body fixing seat; 21. a main body; 22. a support; 221. a support shaft; 30. a first connector; 31. a limit protrusion; 40. a second connector; 41. a side plate; 410. a clamping groove; 411. a first mounting hole; 412. a first hinge hole; 413. a second hinge hole; 42. a connecting plate; 420. a snap hole; 43. an accommodating space; 50. a third connecting member; 60. a fourth connecting member; 61. a plate body; 610. a third hinge hole; 611. a fourth hinge hole; 612. a fifth hinge hole; 62. a push plate; 70. an elastic component; 71. a clip; 710. a mounting part; 7101. a mounting hole; 711. a plug arm; 7110. a snap-fit protrusion; 712. a mounting column; 72. an elastic member; 73. a trigger; 730. a first plug-in connection; 731. a second plug-in connection; 7311. a plug-in groove; 7312. a stop block; 732. a top; 734. a clamping block; 735. a clamping shaft; 736. a mating surface; 74. a connecting shaft; 80. a deceleration assembly; 81. a stopper; 810. an abutment surface; 811. a limit groove; 82. a damping sleeve; 83. a damping rod.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or be present as another intermediate element through which the element is fixed. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the multi-joint self-closing hinge of the present application includes a cabinet fixing base 10, a door fixing base 20, a first connecting member 30, a second connecting member 40, a third connecting member 50, a fourth connecting member 60, an elastic member 70, and a reduction member 80.

The cabinet fixing seat 10 is used for fixing the cabinet. In this embodiment, the multi-joint self-closing hinge is applied to a refrigerator, and the cabinet fixing base 10 is fixed to the refrigerator cabinet. The cabinet fixing base 10 is provided with a containing groove 11 for containing the first connecting piece 30, the second connecting piece 40, the third connecting piece 50 and the fourth connecting piece 60 when the hinge is closed.

The door body fixing seat 20 is used for door body fixing. In this embodiment, the multi-joint self-closing hinge is applied to a refrigerator, and the door body fixing base 20 is fixed to the refrigerator door. The door fixing base 20 includes a main body 21 and a support 22 fixed to the main body 21. The bottom of the body 21 is planar and the support 22 is located at the end of the body 21. The support 22 is of a double-plate design, and is of a triangular structure overall, so that the structural strength is improved. The support 22 is provided with a support shaft 221.

The first connecting piece 30 is of a double-plate type design, the cross section of the first connecting piece 30 is U-shaped, other parts can be contained in the first connecting piece 30 while the structural strength is improved, the size of the hinge is reduced, and the other parts are protected. The first end of the first connecting piece 30 is rotatably connected with the cabinet fixing base 10. The second end of the first link 30 is rotatably coupled to the second link 40. The first connecting member 30 is provided with a limit protrusion 31, and the limit protrusion 31 is used for limiting the moving distance of the reduction assembly 80.

With continued reference to fig. 3, the second connecting member 40 includes two side plates 41 and a connecting plate 42. The connection plate 42 is located between the two side plates 41 and connects the two side plates 41. The two side plates 41 are parallel to each other, and an accommodating space 43 is formed between the two side plates 41. The accommodating space 43 is used for mounting and accommodating the elastic assembly 70. Each side plate 41 is provided with a clamping groove 410, a first mounting hole 411, a first hinge hole 412, and a second hinge hole 413. The clamping groove 410 accommodates the clamping shaft 735 to lock the elastic member 70 and the second connecting member 40. Specifically, the clamping groove 410 is arc-shaped, and the end of the clamping groove 410 is designed as an opening, so that the clamping shaft 735 can be separated from the clamping groove 410, and the elastic assembly 70 is unlocked from the second connecting piece 40. The first hinge hole 412 and the second hinge hole 413 are respectively located at opposite ends of the side plate 41, and the first mounting hole 411 is located between the first hinge hole 412 and the second hinge hole 413 near the first mounting hole 411. The first mounting hole 411 is used for mounting the elastic assembly 70, so that the elastic assembly 70 can be rotatably mounted on the second connecting piece 40 and is located in the accommodating space 43. The first hinge hole 412 is rotatably coupled to the second end of the first link 30, and the second hinge hole 413 is rotatably coupled to the door body fixing base 20. The connecting plate 42 is provided with a fastening hole 420, and the fastening hole 420 is used for fastening with a fastening block 734, so that the elastic assembly 70 is locked with the second connecting piece 40.

With continued reference to fig. 2, the third connecting member 50 is of a linear design, a first end of the third connecting member 50 is rotatably connected to the cabinet fixing base 10, and a second end of the third connecting member 50 is connected to the fourth connecting member 60.

The fourth connecting piece 60 is of a double-plate type design, and other parts can be accommodated in the fourth connecting piece 60 while the structural strength is improved, so that the size of the hinge is reduced, and the other parts are protected. The fourth link 60 includes two plate bodies 61 and a push plate 62. The two plate bodies 61 are parallel to each other, and both sides of the push plate 62 are respectively connected with the edges of the two plate bodies 61. Each of the plate bodies 61 is provided with a third hinge hole 610, a fourth hinge hole 611, and a fifth hinge hole 612. The third hinge hole 610 and the fifth hinge hole 612 are respectively located at both ends of the plate body 61, and the fourth hinge hole 611 is located between the third hinge hole 610 and the fifth hinge hole 612. The third hinge hole 610 is hinged to the middle portion of the first connector 30. The fourth hinge hole 611 is hinged to an end of the third link 50, and the fifth hinge hole 612 is hinged to the door body holder 20.

With continued reference to fig. 4-5, the spring assembly 70 is configured to provide a biasing force to the hinge when closed. The elastic assembly 70 includes a snap 71, an elastic member 72, a trigger 73, and a connecting shaft 74.

The clip 71 includes a mounting portion 710, a plug arm 711, and a mounting post 712. The mounting portion 710 is provided with a mounting hole 7101, and the mounting hole 7101 is used for mounting the connection shaft 74, so that the elastic assembly 70 is rotatably mounted to the second connection member 40 through the connection shaft 74. The insertion arm 711 extends from the mounting portion 710, and the insertion arm 711 is inserted into the trigger 73, so that the locking member 71 is engaged with the trigger 73. The number of the plug arms 711 is plural, and the plurality of plug arms 711 stabilizes the engagement of the catch 71 with the trigger 73. Specifically, in the present embodiment, the number of the plugging arms 711 is two, and the two plugging arms 711 are symmetrically disposed with respect to the mounting portion 710. The end of each of the plugging arms 711 remote from the mounting portion 710 is provided with a snap projection 7110, and the snap projection 7110 is snapped with the stop block 7312 to prevent the plugging arms 711 from being separated from the plugging grooves 7311. A mounting post 712 extends from the mounting section 710 and is located between the two mating arms 711. The mounting post 712 is configured to receive the elastic member 72 and guide the elastic member 72.

The two ends of the elastic piece 72 respectively collide with the buckling piece 71 and the triggering piece 73 to provide elastic force for the triggering piece 73, so that the triggering piece 73 provides closing pretightening force for the door body fixing seat 20. The elastic member 72 is any one of a spring, a disc spring, a shrapnel and a compression spring. Specifically, in the present embodiment, the elastic member 72 is preferably a spring, and the elastic member 72 is sleeved on the mounting post 712.

The trigger 73 includes a first mating portion 730, a second mating portion 731, a top 732, a latch 734, a latch shaft 735, and a mating surface 736. The top 732 connects the first socket 730 and the second socket 731, and a space for accommodating the elastic member 72 and the mounting post 712 is formed between the first socket 730 and the second socket 731. The first insertion portion 730 and the second insertion portion 731 are respectively provided with an insertion slot 7311 and a stop block 7312 located at the end of the insertion slot 7311. The insertion groove 7311 is engaged with the insertion arm 711, so that when the trigger 73 is unlocked from the second connector 40, the trigger 73 slides relative to the catch member 71 under the elastic force of the elastic member 72 to engage with the support shaft 221. The stopper 7312 limits the moving distance of the trigger 73. The clamping block 734 is disposed at the second plugging portion 731, and the clamping block 734 is configured to be snapped with the snapping hole 420, so that the elastic component 70 is locked with the second connecting member 40. The clamping shaft 735 is disposed on the first inserting portion 730, and the clamping shaft 735 is configured to be snapped into the clamping groove 410, so that the elastic assembly 70 is locked with the second connector 40. The mating surface 736 is disposed on the top 732, the mating surface 736 is an arc surface, and the mating surface 736 can be mated with the support shaft 221, so that the elastic assembly 70 rotates around the support shaft 221 to provide a pretightening force to the door fixing seat 20, thereby ensuring the final closing of the door and the cabinet.

The connection shaft 74 is mounted to the mounting hole 7101 and cooperates with the first mounting hole 411 of the second connector 40 such that the elastic member 70 is rotatably mounted to the second connector 40 through the connection shaft 74.

With continued reference to fig. 6, the deceleration assembly 80 includes a stop 81, a damping sleeve 82, and a damping rod 83.

The damping sleeve 82 is mounted inside the first connector 30. The damper rod 83 is partially located inside the damper sleeve 82, and the end of the damper rod 83 located outside the damper sleeve 82 is connected to the stopper 81. The stopper 81 has an abutment surface 810 at an end portion thereof, and the abutment surface 810 is curved. The stopper 81 is provided with a limit groove 811 on a side portion thereof, the limit groove 811 being provided along a movement direction of the stopper 81, and the limit projection 31 being located in the limit groove 811 to limit a movement limit position of the stopper 81.

When the multi-joint self-closing hinge is used, the cabinet body fixing seat 10 is fixedly connected with the cabinet body, and the door body fixing seat 20 is fixedly connected with the door body. When the hinge is in a fully opened state, as shown in fig. 1-2, the included angle between the door body fixing seat 20 and the cabinet body fixing seat 10 is an obtuse angle, so that the requirement of the large opening of the hinge is met. At this time, the clamping shaft 735 of the elastic member 70 is clamped with the clamping groove 410, the clamping block 734 is clamped with the clamping hole 420, the elastic member 70 is locked with the second connecting member 40, and the elastic member 72 is in a compressed state. The trigger 73 does not contact with the support shaft 221 of the door body fixing seat 20, that is, the elastic component 70 does not apply elastic force (closed pre-tightening force) to the door body fixing seat 20, and the door body is kept in an open state, so that a user can conveniently take and place east and west. When the door needs to be closed, an external force is applied to the door body, the door body starts to be closed, the hinge is changed from a fully opened state to a first critical state, when the hinge is in the first critical state, as shown in fig. 7, the clamping block 734 is separated from the clamping hole 420, the clamping shaft 735 slides out of the clamping groove 410, the elastic component 70 is unlocked from the second connecting piece 40, the elastic piece 72 is deformed in a recovery manner, the trigger piece 73 slides relative to the clamping piece 71 under the elastic force of the elastic piece 72 until the matching surface 736 is abutted to the supporting shaft 221, the elastic component 70 rotates around the supporting shaft 221 under the elastic force of the elastic piece 72, and meanwhile, the elastic force of the elastic piece 72 is transferred to the door body fixing seat 20, so that the hinge moves to the fully closed state. When the hinge is moved to the second threshold condition, as shown in fig. 8, the push plate 62 of the fourth link 60 abuts the abutment surface 810 of the stop 81, and the stop 81 moves relative to the damping sleeve 82 and generates a damping force against the fourth link 60, reducing the rate at which the hinge closes until the hinge is in the fully closed condition, as shown in fig. 9. At this time, the first connecting member 30, the second connecting member 40, the third connecting member 50 and the fourth connecting member 60 are accommodated between the cabinet fixing base 10 and the door fixing base 20, and the bottom of the cabinet fixing base 10 is parallel to the top of the door fixing base 20.

In the present application, since the multi-joint self-closing hinge is in the fully opened state, the elastic assembly 70 is locked with the second link 40 and the elastic assembly 70 is in the compressed state; when the multi-joint self-closing hinge is in a first critical state, the elastic component 70 and the second connecting piece 40 are unlocked, the elastic component 70 is restored to deform and is abutted against the door body fixing seat 20 and rotates around the door body fixing seat 20, the elastic force of the elastic component 70 drives the multi-joint self-closing hinge to move towards a closing state, so that when the door body is in a fully opened state, the elastic component 70 does not apply closing acting force to the door body, and a user can conveniently take and place east and west; when the door body rotates through the first critical state, the elastic component 70 applies a closing acting force to the door body, so that the door body and the cabinet body are finally completely closed. When the door body rotates through the second critical state, the push plate 62 collides with the speed reducing assembly 80, so that the speed of closing the door body is reduced, and the safety of closing the door body is improved. The four connecting pieces of the multi-joint self-closing hinge enable the hinge to have larger opening degree when being opened, and are suitable for different use scenes; when the door is closed, the first connecting piece 30, the second connecting piece 40, the third connecting piece 50 and the fourth connecting piece 60 are accommodated between the cabinet fixing base 10 and the door fixing base 20, so that the hinge is small in size and does not occupy space. The first connecting member 30, the second connecting member 40 and the fourth connecting member 60 are all of a double-plate structure, and the multi-joint self-closing hinge is capable of protecting other parts when the first connecting member 30, the second connecting member 40, the third connecting member 50 and the fourth connecting member 60 are positioned at different positions and form different gaps in the closing or opening process.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that, for those skilled in the art, it is possible to make several modifications and improvements without departing from the concept of the present application, which are equivalent to the above embodiments according to the essential technology of the present application, and these are all included in the protection scope of the present application.

Claims

1. The utility model provides a many movable joints self-closing hinge, includes cabinet body fixing base and door body fixing base, its characterized in that: the multi-joint self-closing hinge further comprises a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece and an elastic component,

2. The multi-articulated self-closing hinge of claim 1, wherein: the elastic component is provided with a matching surface, the door body fixing seat comprises a supporting shaft, when the multi-movable joint self-closing hinge is in a first critical state, the matching surface is abutted to the supporting shaft, and the elastic component rotates around the supporting shaft.

3. The multi-articulated self-closing hinge of claim 2, wherein: the elastic component includes fastener, elastic component, trigger piece and connecting axle, the fastener pass through the connecting axle rotate install in the second connecting piece, the elastic component both ends respectively with the fastener with the trigger piece is contradicted, the fastener with the trigger piece is pegged graft, the articulated from when closing the hinge and being in the state completely open, the trigger piece with the second connecting piece locks, the mating surface set up in on the trigger piece.

4. A multi-articulated self-closing hinge according to claim 3, wherein: the trigger piece comprises a clamping block, the second connecting piece is provided with a clamping hole, when the multi-movable joint self-closing hinge is in a complete opening state, the clamping block is positioned in the clamping hole, and when the multi-movable joint self-closing hinge is in a first critical state, the clamping block is separated from the clamping hole.

5. A multi-articulated self-closing hinge according to claim 3, wherein: the trigger piece comprises a clamping shaft, the second connecting piece is provided with a clamping groove, the clamping shaft is positioned in the clamping groove when the multi-movable joint self-closing hinge is in a completely opened state, and the clamping shaft is separated from the clamping groove when the multi-movable joint self-closing hinge is in a first critical state.

6. A multi-articulated self-closing hinge according to claim 3, wherein: the trigger piece is provided with a plugging groove, the tail end of the plugging groove is provided with a stop block, the buckle piece comprises a plugging arm, the end part of the plugging arm is provided with a buckle bulge, the plugging arm is positioned in the plugging groove, when the multi-movable joint self-closing hinge is in a completely opened state, the plugging arm is plugged in the plugging groove, and when the multi-movable joint self-closing hinge is in a first critical state, the plugging groove moves relative to the plugging arm until the buckle bulge is in collision with the stop block.

7. The multi-articulated self-closing hinge of claim 1, wherein: the second connecting piece comprises two side plates and a connecting plate connected with the two side plates, an accommodating space is formed between the two side plates, and the elastic component is positioned in the accommodating space.

8. The multi-articulated self-closing hinge of claim 1, wherein: the fourth connecting piece is provided with a third hinge hole, a fourth hinge hole and a fifth hinge hole, the fourth connecting piece is rotationally connected with the first connecting piece through the third hinge hole, the fourth connecting piece is rotationally connected with the third connecting piece through the fourth hinge hole, the fourth connecting piece is rotationally connected with the door body fixing seat through the fifth hinge hole, and the fourth hinge hole is located between the third hinge hole and the fifth hinge hole.

9. The multi-articulated self-closing hinge of claim 1, wherein: the fourth link includes a push plate, the multi-joint self-closing hinge further includes a deceleration assembly, and the push plate interferes with the deceleration assembly when the multi-joint self-closing hinge is in the second threshold state.

10. The multi-articulated self-closing hinge of claim 9, wherein: the speed reducing assembly comprises a stop piece, a damping sleeve and a damping rod, wherein the damping rod is installed on the damping sleeve, the top end of the damping rod is connected with the stop piece, the stop piece is provided with an abutting surface, when the multi-movable joint self-closing hinge is in a completely opened state and a first critical state, the push plate is separated from the abutting surface, and when the multi-movable joint self-closing hinge is in a second critical state, the push plate is abutted to the abutting surface.

11. The multi-articulated self-closing hinge of claim 10, wherein: the deceleration assembly is mounted within the first connector.

12. The multi-articulated self-closing hinge of claim 11, wherein: the stop piece is provided with a limiting groove, the first connecting piece comprises a limiting protrusion, and the limiting protrusion is located in the limiting groove.

13. The multi-articulated self-closing hinge of claim 1, wherein: when the multi-movable joint self-closing hinge is in a fully opened state, the cabinet body fixing seat and the door body fixing seat form an obtuse included angle.

14. The multi-articulated self-closing hinge of claim 1, wherein: when the multi-joint self-closing hinge is in a complete closing state, the first connecting piece, the second connecting piece, the third connecting piece and the fourth connecting piece are contained between the cabinet body fixing seat and the door body fixing seat, and the bottom of the cabinet body fixing seat is parallel to the top of the door body fixing seat.