Multi-joint self-closing hinge and refrigerator

Abstract

Disclosed in the present invention is a multi-joint self-closing hinge, comprising a cabinet body fixed seat, a door body fixed seat, a transmission assembly and a return mechanism. The transmission assembly is rotatably connected to the cabinet body fixed seat and the door body fixed seat, the return mechanism is mounted in the door body fixed seat and is connected to the transmission assembly, and the return mechanism can drive the multi-joint self-closing hinge to move towards a closed state. In the multi-joint self-closing hinge, since the return mechanism is arranged on the door body fixed seat, the width of the transmission assembly and the width of the cabinet body fixed seat for accommodating the transmission assembly are reduced, and the space of a cabinet body occupied during installation is small, thereby increasing the internal volume of the cabinet body while causing little impact on the appearance of the cabinet body.

Description

Multi-joint self-closing hinge and refrigerator TECHNICAL FIELD

[0001] The present application relates to a hinge, in particular to a multi-joint self-closing hinge and a refrigerator. BACKGROUND

[0002] The door body and the cabinet body of the freezer are usually connected by a multi-joint self-closing hinge. The multi-joint self-closing hinge usually includes a cabinet body fixing seat, a door body fixing seat, and a transmission assembly connecting the cabinet body fixing seat and the door body fixing seat. The transmission assembly usually includes multiple joint levers connected to each other in a scissors shape. For example, a multi-joint self-closing hinge disclosed in Chinese patent application CN117090464A includes 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 assembly. The first connecting piece, the second connecting piece, the third connecting piece, and the fourth connecting piece constitute a transmission assembly connecting the cabinet body fixing seat and the door body fixing seat. The elastic assembly is installed on the second connecting piece of the transmission assembly. When the door body is opened to a critical state, the elastic assembly exerts a closing force on the door body, causing the door body to automatically close.

[0003] In the development process of the refrigerator, it has gradually become a user demand to simultaneously or separately open the doors of the upper and lower cabinets. When installing the multi-joint self-closing hinge of this kind of refrigerator, the cabinet body fixing seat needs to be fixed on the middle beam between the upper and lower inner tanks of the refrigerator. Since the elastic assembly of the above-mentioned multi-joint self-closing hinge is installed on the second connecting piece of the transmission assembly, the second connecting piece must have sufficient width to provide a space for the elastic assembly. The increase in the width of the second connecting piece inevitably leads to an increase in the width of the transmission assembly and the cabinet body fixing seat that accommodates the transmission assembly, thereby causing the middle beam of the refrigerator to have sufficient width to meet the installation of the cabinet body fixing seat. The too large width of the middle beam of the refrigerator not only makes the actual use space in the refrigerator smaller, but also is not aesthetically pleasing in appearance. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, one of the purposes of the present application is to provide a multi-joint self-closing hinge that occupies less space of the cabinet when installed.

[0005] One of the purposes of the present application is achieved by using the following technical solution:

[0006] A multi-joint self-closing hinge includes a cabinet body fixing seat, a door body fixing seat, a transmission assembly, and a rebound mechanism. The transmission assembly is rotationally connected to the cabinet body fixing seat and the door body fixing seat. The rebound mechanism is installed in the door body fixing seat and connected to the transmission assembly. The rebound mechanism can drive the multi-joint self-closing hinge to move towards a closed state.

[0007] Further, the rebound mechanism comprises an elastic assembly, a driving wheel and a cam. The elastic assembly is arranged in the door body fixing base. The driving wheel is rotatably connected with the elastic assembly. The cam is fixed with the transmission assembly. The cam is in sliding abutment with the driving wheel. During the process that the multi-articulation self-closing hinge is forced to open from the closed state to a critical state, the cam is in sliding abutment with the driving wheel to make the elastic assembly elastically deform. After the external force is removed, the elastic assembly restores the deformation to drive the multi-articulation self-closing hinge to the closed state.

[0008] Further, the circumferential wall of the cam is provided with an inner concave surface and an arc-shaped convex surface along the circumference. A convex tooth surface is formed between the inner concave surface and the arc-shaped convex surface. When the multi-articulation self-closing hinge is in the closed state, the elastic assembly is in a first compressed state. When the multi-articulation self-closing hinge changes from the closed state to the critical state, the driving wheel moves along the inner concave surface to the convex tooth surface and compresses the elastic assembly to a second compressed state. When the multi-articulation self-closing hinge moves from the critical state to the fully open state, the driving wheel passes the convex tooth surface and is in abutment with the arc-shaped convex surface.

[0009] Further, the side of the door body fixing base away from the cabinet body fixing base is provided with a clamping portion. When the multi-articulation self-closing hinge is in the closed state, the side of the cam provided with the arc-shaped convex surface is clamped in the clamping portion, thereby locking the cam.

[0010] Further, when the multi-articulation self-closing hinge is in the fully open state, the arc-shaped convex surface is in abutment with the driving wheel, thereby making the elastic assembly remain in the second compressed state to lock the driving wheel.

[0011] Further, the elastic assembly comprises an elastic piece and a rotating arm. One end of the elastic piece is rotatably arranged in the door body fixing base. The rotating arm is rotatably connected with the door body fixing base through a connecting shaft. The opposite ends of the rotating arm are rotatably connected with the other end of the elastic piece and the driving wheel, respectively. During the process that the multi-articulation self-closing hinge is forced to open from the closed state to the critical state, the cam is in sliding abutment with the driving wheel to make the rotating arm rotate around the connecting shaft, thereby making the elastic piece elastically deform.

[0012] Further, the rotating arm comprises a pair of arm plates and a connecting plate connecting the pair of arm plates. The pair of arm plates are respectively located at the opposite ends of the driving wheel. The arm plates are sleeved on the connecting shaft, and the opposite ends of the arm plates are rotatably connected with the elastic piece and the driving wheel, respectively.

[0013] Further, the elastic member comprises a mounting seat and a compression spring, the mounting seat comprises a first seat body, a second seat body and an extension component connecting the first seat body and the second seat body, the first seat body is rotatably arranged in the door body fixing seat, and the second seat body is rotatably connected with an end of the rotating arm away from the driving wheel; the compression spring is sleeved on the extension component and elastically abuts against the first seat body and the second seat body.

[0014] Further, the extension component comprises a fixed rod and a sliding sleeve sleeved on the fixed rod, one of the fixed rod and the sliding sleeve is fixed on the first seat body, and the other is fixed on the second seat body.

[0015] Further, the multi-articulated self-closing hinge comprises two door body fixing seats and two transmission assemblies corresponding to the two door body fixing seats, the two door body fixing seats are arranged along the width direction of the cabinet body fixing seat, the two transmission assemblies are arranged along the width direction of the cabinet body fixing seat, each transmission assembly is rotatably connected with the cabinet body fixing seat and the corresponding door body fixing seat, and the rebound mechanism is arranged in each door body fixing seat.

[0016] Further, each transmission assembly comprises a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece, two ends of the first connecting piece are respectively pivotally connected with the cabinet body fixing seat and the second connecting piece, two ends of the second connecting piece are respectively pivotally connected with the first connecting piece and the corresponding door body fixing seat, two ends of the third connecting piece are respectively pivotally connected with the cabinet body fixing seat and the fourth connecting piece, and two ends of the fourth connecting piece are respectively pivotally connected with the first connecting piece and the corresponding door body fixing seat; the rebound mechanism is connected with the corresponding second connecting piece.

[0017] Further, one end of the second connecting piece is pivotally connected with the door body fixing seat through a first holding shaft, and the cam sleeve is sleeved on the first holding shaft and fixedly connected with the second connecting piece.

[0018] Further, a speed reduction assembly is further arranged in the first connecting piece, and one end of the fourth connecting piece is slidably abutted against the speed reduction assembly, so that the closing speed of the cabinet hinge is reduced when the cabinet hinge is closed.

[0019] One of the purposes of the application is achieved by adopting the following technical solution two:

[0020] A refrigerator comprising the multi-articulated self-closing hinge.

[0021] Compared with the prior art, the multi-articulated self-closing hinge has the following advantages:

[0022] The resilient mechanism is arranged on the door body fixing base, so that the width of the transmission assembly and the cabinet body fixing base accommodating the transmission assembly is reduced, the position of the cabinet body occupied by the resilient mechanism is small, the volume of the cabinet body is increased, and the appearance of the cabinet body is less affected.

[0023] The multi-joint self-closing hinge includes a pair of transmission assemblies independently pivotally arranged on the cabinet body fixing base, and the pair of transmission assemblies are connected to the two door body fixing bases respectively, so that the two door bodies connected to the pair of transmission assemblies can be opened or closed simultaneously or separately. Compared with the prior art in which two multi-joint self-closing hinges are used to connect two door bodies, the position of the cabinet body occupied by the resilient mechanism is smaller, the volume of the cabinet body is further increased, and the appearance of the cabinet body is further affected. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a perspective view of a multi-joint self-closing hinge according to a preferred embodiment of the present application in a critical state;

[0025] Fig. 2 is a front view of the multi-joint self-closing hinge shown in Fig. 1;

[0026] Fig. 3 is a structural view of a cabinet body fixing base in the multi-joint self-closing hinge according to the preferred embodiment of the present application;

[0027] Fig. 4 is a structural view of a base of a door body fixing base in the multi-joint self-closing hinge according to the preferred embodiment of the present application;

[0028] Fig. 5 is a structural view of a first connecting piece in the multi-joint self-closing hinge according to the preferred embodiment of the present application;

[0029] Fig. 6 is a structural view of a second connecting piece in the multi-joint self-closing hinge according to the preferred embodiment of the present application;

[0030] Fig. 7 is a structural view of a third connecting piece in the multi-joint self-closing hinge according to the preferred embodiment of the present application;

[0031] Fig. 8 is a structural view of a fourth connecting piece in the multi-joint self-closing hinge according to the preferred embodiment of the present application;

[0032] Fig. 9 is a structural view of the second connecting piece, the resilient mechanism and the cover plate in the multi-joint self-closing hinge according to the preferred embodiment of the present application;

[0033] Fig. 10 is a structural view of Fig. 9 without a compression spring;

[0034] Fig. 11 is a structural view of Fig. 9 from another perspective;

[0035] Fig. 12 is a top view of Fig. 1;

[0036] Fig. 13 is a cross-sectional view of Fig. 12 along line A-A;

[0037] Fig. 14 is an enlarged view of a portion of the structure of Fig. 13;

[0038] Fig. 15 is a perspective view of a multi-articulating self-closing hinge in a closed position according to a preferred embodiment of the present application;

[0039] Fig. 16 is a top view of Fig. 15;

[0040] Fig. 17 is a cross-sectional view of Fig. 16 along line B-B;

[0041] Fig. 18 is a perspective view of a multi-articulating self-closing hinge in a fully open position according to a preferred embodiment of the present application;

[0042] Fig. 19 is a top view of Fig. 18;

[0043] Fig. 20 is a cross-sectional view of Fig. 18 along line C-C;

[0044] In the figure: 100, multi-articulation self-closing hinge; 10, cabinet body fixing seat; 11, bottom side; 12, extension side; 121, first through hole; 123, second through hole; 13, side blocking part; 14, accommodating groove; 15, first through shaft; 16, second through shaft; 30, door body fixing seat; 31, base; 311, bottom plate; 312, clamping part; 313, side plate; 3131, first retaining hole; 3132, second retaining hole; 3133, shaft hole; 3134, mounting hole; 3135, bayonet; 314, first retaining shaft; 315, second retaining shaft; 316, connecting shaft; 317, mounting shaft; 34, cover plate; 341, end plate part; 342, blocking part; 343, elastic arm; 344, clamping protrusion; 345, stiffener; 346, position avoiding hole; 35, mounting space; 50, transmission assembly; 51, first connecting piece; 511, bottom part; 512, notch; 513, side part; 514, first fixing hole; 515, second fixing hole; 516, third fixing hole; 517, first fixing shaft; 518, second fixing shaft; 52, second connecting piece; 521, side plate part; 522, first connecting hole; 523, second connecting hole; 525, connecting plate; 53, third connecting piece; 531, main body part; 532, first end; 533, first hole; 534, second end; 535, second hole; 536, clamping shaft; 54, fourth connecting piece; 541, side wall; 543, connecting part; 544, first clamping hole; 545, second clamping hole; 546, third clamping hole; 547, abutting face; 70, rebounding mechanism; 71, elastic assembly; 711, elastic piece; 713, mounting seat; 7131, first seat body; 7132, second seat body; 7134, telescopic part; 7135, fixing rod; 7136, sliding sleeve; 714, compression spring; 715, rotating arm; 7151, arm plate; 7153, engaging plate; 7154, first sleeving hole; 7155, second sleeving hole; 7156, third sleeving hole; 73, driving wheel; 75, cam; 751, inner concave face; 753, arc convex face; 754, convex tooth face; 76, first penetrating shaft; 77, second penetrating shaft; 80, speed reduction assembly. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] It should be noted that when a component is referred to as being "on" another component, it can be directly on the other component or intervening components can also be present therebetween. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can also be present therebetween. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or intervening components can also be present therebetween. The terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for illustrative purposes only.

[0047] Unless otherwise defined, 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0048] Referring to FIG. 1 and FIG. 13, a multi-joint self-closing hinge 100 according to a preferred embodiment of the present application includes a cabinet fixing seat 10, a door fixing seat 30, a transmission assembly 50, and a rebound mechanism 70. The transmission assembly 50 is rotatably connected to the cabinet fixing seat 10 and the door fixing seat 30. The rebound mechanism 70 is disposed in the door fixing seat 30 and connected to the transmission assembly 50. The rebound mechanism 70 is capable of driving the multi-joint self-closing hinge 100 to move to a closed state.

[0049] In the multi-joint self-closing hinge 100 according to the present embodiment, the multi-joint self-closing hinge 100 is applied to a cabinet having at least two doors arranged in an up-down direction. The cabinet fixing seat 10 is used to fix a center beam (not shown) of the cabinet. Specifically, the multi-joint self-closing hinge 100 is applied to a refrigerator. The cabinet fixing seat 10 is fixed to the center beam of the cabinet of the refrigerator. Referring to FIG. 2 and FIG. 3, the cabinet fixing seat 10 has a substantially U-shaped cross section. The cabinet fixing seat 10 is capable of accommodating other components, thereby reducing the volume of the multi-joint self-closing hinge 100 and protecting the other components. The cabinet fixing seat 10 includes a bottom side 11, a pair of extension sides 12 extending perpendicularly from both sides of the bottom side 11, and a side blocking portion 13 connecting the bottom side 11 and the pair of extension sides 12. The bottom side 11, the pair of extension sides 12, and the side blocking portion 13 form an accommodation groove 14 for accommodating other components. The pair of extension sides 12 are provided with a first through hole 121 and a second through hole 123 at intervals. The first through hole 121 is fixed by a first through shaft 15. The second through hole 123 is fixed by a second through shaft 16.

[0050] The door body fixing seat 30 is used for fixing a door body (not shown in the figure). In the embodiment, the multi-joint self-closing hinge 100 includes a pair of door body fixing seats 30 arranged along the width direction of the cabinet body fixing seat 10, and each of the door body fixing seats 30 is used for fixing a door body connected to the cabinet body. Each door body fixing seat 30 includes a base 31 and a cover plate 34 connected to the base 31. The cover plate 34 and the base 31 form an installation space 35 (shown in FIG. 14) capable of accommodating components such as the rebound mechanism 70, thereby reducing the volume of the multi-joint self-closing hinge 100 and protecting other components.

[0051] Referring to FIG. 4, the base 31 has a substantially U-shaped cross section. The base 31 includes a bottom plate 311 and a pair of side plates 313 vertically extending from both sides of the bottom plate 311. In the embodiment, the bottom plate 311 is located on the side of the door body fixing seat 30 away from the cabinet body fixing seat 10, and the bottom plate 311 is provided with a clamping portion 312, which is a clamping hole provided on the bottom plate 311. The side plates 313 are provided with a first retaining hole 3131, a second retaining hole 3132, a shaft hole 3133, a mounting hole 3134, and a bayonet 3135 at intervals along the length of the side plates 313. The first retaining hole 3131 is located between the second retaining hole 3132 and the shaft hole 3133, and the mounting hole 3134 is located between the shaft hole 3133 and the bayonet 3135. The pair of first retaining holes 3131 of the pair of side plates 313 are fixed by a first retaining shaft 314. The pair of second retaining holes 3132 of the pair of side plates 313 are fixed by a second retaining shaft 315. The pair of shaft holes 3133 of the pair of side plates 313 are fixed by a connecting shaft 316. The pair of mounting holes 3134 of the pair of side plates 313 are fixed by a mounting shaft 317.

[0052] Please see FIG. 9, FIG. 11 and FIG. 18, the cover plate 34 includes an end plate 341, a blocking part 342, a pair of elastic arms 343 and a pair of stiffening plates 345. The end plate 341 is located at one end of the base 31 away from the second holding shaft 315, and is arranged between the bottom plate 311 and the pair of side plates 313; the blocking part 342 is arranged between the pair of side plates 313, and one end of the blocking part 342 is connected to the side of the end plate 341 away from the bottom plate 311. The pair of elastic arms 343 and the pair of stiffening plates 345 are both accommodated in the mounting space 35, wherein the pair of elastic arms 343 are arranged opposite to each other along the width direction of the cover plate 34, one end of the pair of elastic arms 343 is fixed to the blocking part 342, the other end of the elastic arm 343 is provided with a clamping protrusion 344, and the pair of clamping protrusions 344 of the pair of elastic arms 343 are respectively clamped with the pair of clamping holes 3135 on the pair of side plates 313, so as to connect the cover plate 34 and the base 31 together. The stiffening plate 345 is located between the elastic arm 343 and the connecting shaft 316, and the pair of stiffening plates 345 are arranged opposite to each other along the width direction of the cover plate 34 and are fixedly connected to the blocking part 342, and the stiffening plate 345 is provided with a clearance hole 346 for the mounting shaft 317 to pass through.

[0053] The multi-joint self-closing hinge 100 is provided with two transmission assemblies 50 corresponding to the two door body fixing bases 30, and the two transmission assemblies 50 are arranged along the width direction of the cabinet body fixing base 10, and each transmission assembly 50 is rotationally connected to the cabinet body fixing base 10 and the corresponding door body fixing base 30. Each transmission assembly 50 includes a first connecting piece 51, a second connecting piece 52, a third connecting piece 53 and a fourth connecting piece 54, both ends of the first connecting piece 51 are respectively pivotally connected to the cabinet body fixing base 10 and the second connecting piece 52, both ends of the second connecting piece 52 are respectively pivotally connected to the first connecting piece 51 and the corresponding door body fixing base 30, both ends of the third connecting piece 53 are respectively pivotally connected to the cabinet body fixing base 10 and the fourth connecting piece 54, and both ends of the fourth connecting piece 54 are respectively pivotally connected to the first connecting piece 51 and the door body fixing base 30.

[0054] Please refer to Fig. 5, the first connecting member 51 is roughly in U shape, which can increase the structural strength, and the inside of the first connecting member 51 can accommodate other components, so as to reduce the size of the hinge and protect other components. The first connecting member 51 comprises a bottom 511 and two side portions 513 vertically extended from two sides of the bottom 511. In this embodiment, the bottom 511 is provided with a gap 512 to divide the bottom 511 into two parts. The side portion 513 is provided with a first fixing hole 514, a second fixing hole 515 and a third fixing hole 516 between the first fixing hole 514 and the second fixing hole 515. The first fixing hole 514 is fixed by the first through shaft 15, so that one end of the first connecting member 51 is rotatably connected with the cabinet fixed seat 10; the second fixing hole 515 is fixed by the first fixing shaft 517; and the third fixing hole 516 is fixed by the second fixing shaft 518. The end of the first connecting member 51 provided with the first fixing hole 514 is accommodated by the accommodating groove 14 of the cabinet fixed seat 10.

[0055] Please refer to Fig. 6, the second connecting member 52 comprises a pair of side plate portions 521 and a connecting plate 525 connecting the pair of side plate portions 521. The side plate portion 521 is provided with a first connecting hole 522 and a second connecting hole 523. The pair of first connecting holes 522 of the pair of side plate portions 521 are fixed by the first fixing shaft 517, so that one end of the second connecting member 52 is rotatably connected with the first connecting member 51. The pair of second connecting holes 523 of the pair of side plate portions 521 are fixed by the first holding shaft 314, so that the other end of the second connecting member 52 is rotatably connected with the door fixed seat 30.

[0056] Please refer to Fig. 7, the third connecting member 53 is roughly in plate shape, and the third connecting member 53 comprises a main body portion 531 and a first end 532 and a second end 534 at two ends of the main body portion 531. The first end 532 is provided with a first hole 533, and the first hole 533 is fixed by the second through shaft 16, so that the first end 532 of the fourth connecting member 54 is accommodated in the cabinet fixed seat 10 and rotatably connected with the cabinet fixed seat 10. The second end 534 is provided with a second hole 535, and the second hole 535 is fixed by the clamping shaft 536.

[0057] Please refer to Fig. 8, the fourth connecting piece 54 comprises a pair of oppositely arranged side walls 541 and a connecting portion 543 connecting the pair of side walls 541; in the embodiment, the connecting portion 543 can be a connecting block fixedly connecting the pair of side walls 541, so as to further improve the strength of the fourth connecting piece 54. The fourth connecting piece 54 is provided with a first clamping hole 544, a second clamping hole 545 and a third clamping hole 546 located between the first clamping hole 544 and the second clamping hole 545, the first clamping hole 544 and the second clamping hole 545 are respectively located at opposite ends of the fourth connecting piece 54, the first clamping hole 544 and the second clamping hole 545 both penetrate the pair of side walls 541 and the connecting portion 543, and the third clamping hole 546 penetrates the pair of side walls 541. The first clamping hole 544 is fixedly penetrated by the first fixed shaft 314, so that one end of the fourth connecting piece 54 is accommodated in the door body fixing seat 30 and rotationally connected with the door body fixing seat 30. The second clamping hole 545 is fixedly penetrated by the second fixed shaft 518, so that the other end of the fourth connecting piece 54 is accommodated in the first connecting piece 51 and rotationally connected with the first connecting piece 51; the arrangement of the notch 512 of the first connecting piece 51 exposes the other end of the fourth connecting piece 54 to the first connecting piece 51, so that the movement of the fourth connecting piece 54 will not be interfered by the first connecting piece 51 during the opening or closing of the multi-articulation self-closing hinge 100, and the opening and closing of the multi-articulation self-closing hinge 100 is not blocked. The pair of third clamping holes 546 on the pair of side walls 541 are fixedly penetrated by the clamping shaft 536, so that the fourth connecting piece 54 is rotationally connected with the second end 534 of the third connecting piece 53.

[0058] The door body fixing seat 30 is provided with a resilient mechanism 70, and the resilient mechanism 70 is connected with the corresponding second connecting piece 52. Please refer to Figs. 9 to 14 again, the resilient mechanism 70 comprises a resilient assembly 71, a driving wheel 73 and a cam 75, the resilient assembly 71 is arranged in the door body fixing seat 30, the driving wheel 73 is rotationally connected with the resilient assembly 71, the cam 75 is fixed with the second connecting piece 52 of the transmission assembly 50, and the cam 75 is in sliding abutment with the driving wheel 73. When the multi-articulation self-closing hinge 100 is forced to open from the closed state to a critical state, the cam 75 slides against the driving wheel 73 to make the resilient assembly 71 elastically deform, and after the external force is removed, the resilient assembly 71 restores the deformation to drive the multi-articulation self-closing hinge 100 to move to the closed state.

[0059] In the embodiment, the elastic assembly 71 comprises an elastic member 711 and a rotating arm 715. One end of the elastic member 711 is rotatably arranged in the door body fixing seat 30. In the embodiment, the elastic member 711 comprises a mounting seat 713 and a compression spring 714. The mounting seat 713 comprises a first seat body 7131, a second seat body 7132 and an extension component 7134 connecting the first seat body 7131 and the second seat body 7132. The first seat body 7131 is rotatably arranged in the door body fixing seat 30. Specifically, the first seat body 7131 is sleeved on the mounting shaft 317 to be rotatably arranged in the door body fixing seat 30 through the mounting shaft 317. The extension component 7134 comprises a fixed rod 7135 and a sliding sleeve 7136 sleeved on the fixed rod 7135. One end of the fixed rod 7135 outside the sliding sleeve 7136 is fixedly connected with the second seat body 7132, and one end of the sliding sleeve 7136 away from the fixed rod 7135 is fixedly connected with the first seat body 7131. The compression spring 714 is sleeved on the extension component 7134 and elastically abuts against the first seat body 7131 and the second seat body 7132, so that the elastic member 711 is in a first compressed state. In the embodiment, the compression spring 714 is sleeved outside the fixed shaft and the sliding sleeve 7136, and the extension component 7134 can perform extension movement with the elastic deformation of the compression spring 714. It can be understood that in other embodiments, the fixed rod 7135 can be fixedly connected with the first seat body 7131, and the sliding sleeve 7136 can be fixedly connected with the second seat body 7132.

[0060] The rotating arm 715 is rotatably connected with the door body fixing seat 30 through the connecting shaft 316, and opposite ends of the rotating arm 715 are rotatably connected with the other end of the elastic member 711 and the driving wheel 73 respectively. In the embodiment, the rotating arm 715 comprises a pair of arm plates 7151 and a connecting plate 7153 connecting the pair of arm plates 7151. The arm plate 7151 is sleeved on the connecting shaft 316, and opposite ends of the arm plate 7151 are rotatably connected with the elastic member 711 and the driving wheel 73 respectively. Specifically, the arm plate 7151 of the rotating arm 715 is provided with a first sleeving hole 7154, a second sleeving hole 7155 and a third sleeving hole 7156 located between the first sleeving hole 7154 and the second sleeving hole 7155, and the line connecting the first sleeving hole 7154 and the second sleeving hole 7155 is located between the third sleeving hole 7156 and the cabinet body fixing seat 10, so that the line connecting the first sleeving hole 7154, the second sleeving hole 7155 and the third sleeving hole 7156 forms a triangle. The end of the rotating arm 715 away from the driving wheel 73 is rotatably connected with the second seat body 7132, specifically: a pair of first sleeving holes 7154 on the pair of arm plates 7151 of the rotating arm 715 are fixed by the first penetrating shaft 76, and the second seat body 7132 of the elastic member 711 is located between the pair of arm plates 7151 and is sleeved on the first penetrating shaft 76. A pair of second sleeving holes 7155 on the pair of arm plates 7151 of the rotating arm 715 are fixed by the second penetrating shaft 77. A pair of third sleeving holes 7156 on the pair of arm plates 7151 of the rotating arm 715 are sleeved on the connecting shaft 316, so as to rotatably connect the rotating arm 715 and the door body fixing seat 30 together. The driving wheel 73 is rotatably connected with the end of the rotating arm 715 away from the elastic member 711. In the embodiment, the driving wheel 73 is located between the pair of arm plates 7151 and is sleeved on the second penetrating shaft 77, so as to be rotatably connected with the rotating arm 715.

[0061] In the embodiment, the cam 75 is sleeved on the first holding shaft 314 and is fixed with the two side plate portions 521 of the second connecting piece 52, so that the cam 75 can rotate with the second connecting piece 52. The peripheral wall of the cam 75 is provided with an inner concave surface 751 and an arc-shaped convex surface 753 along the circumference, and a convex tooth surface 754 is formed between the inner concave surface 751 and the arc-shaped convex surface 753. During the rotation of the cam 75 with the second connecting piece 52, the driving wheel 73 can slide along the inner concave surface 751, the convex tooth surface 754 and the arc-shaped convex surface 753.

[0062] The multi-articulation self-closing hinge 100 of the present embodiment further comprises a deceleration assembly 80, which is arranged in the first connecting member 51 and is fixedly connected to the bottom 511 and the side 513 of the first connecting member 51. One end of the fourth connecting member 54 is slidingly abutted against the deceleration assembly 80 to reduce the closing speed of the cabinet when the cabinet is closed. In the present embodiment, the end of the connecting portion 543 close to the first connecting member 51 is provided with an abutting surface 547 (shown in FIG. 17). When the multi-articulation self-closing hinge 100 is in the critical state, the abutting surface 547 of the fourth connecting member 54 is slidingly abutted against the deceleration assembly 80 to reduce the closing speed of the multi-articulation self-closing hinge 100 until the multi-articulation self-closing hinge 100 enters the closed state. The deceleration assembly 80 can be a damper of the prior art, and its structure belongs to the prior art. To save space, it will not be described here.

[0063] Please refer to FIG. 13, FIG. 16 to FIG. 20, in the present embodiment, the multi-articulation self-closing hinge 100 can be switched between three different states, specifically: when the multi-articulation self-closing hinge 100 is in the fully open state, the included angle between the door body fixing seat 30 and the cabinet fixing seat 10 is obtuse; when the multi-articulation self-closing hinge 100 is in the critical state, the included angle between the door body fixing seat 30 and the cabinet fixing seat 10 is acute; when the multi-articulation self-closing hinge 100 is in the closed state, the door body fixing seat 30 and the cabinet fixing seat 10 are substantially parallel.

[0064] When the multi-articulation self-closing hinge 100 is used, the cabinet fixing seat 10 is fixedly connected to the cabinet, and the door body fixing seat 30 is fixedly connected to the door. When the multi-articulation self-closing hinge 100 is in the closed state, the door body fixing seat 30 and the cabinet fixing seat 10 are arranged in parallel, and the first connecting member 51, the second connecting member 52, the third connecting member 53 and the fourth connecting member 54 are accommodated therebetween. The elastic assembly 71 is in the first compressed state, the driving wheel 73 is abutted against the inner concave surface 751 of the cam 75 under the action of the elastic assembly 71, so that the side of the cam 75 provided with the arc-shaped convex surface 753 is clamped in the clamping portion 312, thereby locking the cam 75 and preventing the multi-articulation self-closing hinge 100 from being accidentally opened.

[0065] When the external force applied to the multi-articulation self-closing hinge 100 is greater than the pre-tightening force of the elastic assembly 71 applied to the multi-articulation self-closing hinge 100, the multi-articulation self-closing hinge 100 is opened from the closed state to the critical state, in the process, the cam 75 rotates along with the second connecting piece 52 in the counterclockwise direction of the view angle of FIG. 13, the side of the cam 75 provided with the arc convex surface 753 is disengaged from the clamping part 312, and the driving wheel 73 moves along the inner concave surface 751 of the cam 75 to the convex tooth surface 754; the movement of the driving wheel 73 drives the rotating arm 715 to rotate around the connecting shaft 316 in the clockwise direction of the view angle of FIG. 13, and further makes the driving wheel 73 move towards the cover plate 34 and further compresses the elastic assembly 71 to the second compression state. When the multi-articulation self-closing hinge 100 is in any position between the closed state and the critical state, the elastic assembly 71 restores the deformation after the external force is removed, and through the cooperation of the driving wheel 73 and the convex tooth surface 754, the cam 75 and the second connecting piece 52 rotate in the clockwise direction of the view angle of FIG. 13, thereby driving the multi-articulation self-closing hinge 100 to move towards the closed state, thereby avoiding the opening of the multi-articulation self-closing hinge 100 due to misoperation.

[0066] When the multi-articulation self-closing hinge 100 moves from the critical state to the fully open state, the driving wheel 73 passes the convex tooth surface 754 and abuts against the arc convex surface 753. In the process, the arc convex surface 753 abuts against the driving wheel 73, so that the elastic assembly 71 remains in the second compression state to lock the driving wheel 73. At this time, the elastic assembly 71 does not exert a closing force on the door body fixing seat 30, thereby effectively avoiding the risk of impact on the user caused by the automatic closing of the door body fixing seat 30, improving the safety of use, and also facilitating the user to take and place things.

[0067] When the user needs to open two door bodies of the cabinet body at the same time, force can be applied to the two door bodies at the same time, thereby driving the two door body fixing seats 30 to rotate, and driving the second connecting piece 52, the fourth connecting piece 54, the third connecting piece 53 and the first connecting piece 51 of the two transmission assemblies 50 to move, thereby completing the opening process of the cabinet body door body. In the process, the opening process of any transmission assembly 50 will not affect the opening process of the other transmission assembly 50, and the user can also open or close only one of the door bodies according to the need, without affecting the state of the other door body.

[0068] The application also includes a refrigerator, which comprises the above-mentioned multi-articulation self-closing hinge 100.

[0069] Since the above-mentioned multi-articulation self-closing hinge 100 sets the rebound mechanism 70 on the door body fixing seat 30, the width of the transmission assembly 50 and the cabinet body fixing seat 10 accommodating the transmission assembly 50 is reduced, thereby occupying a smaller position of the cabinet body during installation, increasing the internal volume of the cabinet body, and having less influence on the appearance of the cabinet body.

[0070] The multi-articulation self-closing hinge 100 comprises a pair of transmission assemblies 50 pivotally arranged on the cabinet fixed seat 10, and the pair of transmission assemblies 50 are respectively connected to the two door fixed seats 30, so that the two doors connected to the pair of transmission assemblies 50 can be simultaneously opened or closed, or respectively opened or closed. Compared with the prior art in which two multi-articulation self-closing hinges 100 are respectively connected to the two doors, the cabinet occupies a smaller position, so that the internal volume of the cabinet is further increased, and the influence on the appearance of the cabinet is further reduced.

[0071] It can be understood that the multi-articulation self-closing hinge 100 can also only comprise one transmission assembly 50 and one door fixed seat 30, so as to be applied to a cabinet with only one door.

[0072] It can be understood that the structure of the rebound mechanism 70 is not limited to the embodiment, and the rebound mechanism 70 of other structures in the prior art can also be used.

[0073] It can be understood that the structure of the transmission assembly 50 is not limited to the embodiment, and the transmission assembly 50 of other structures in the prior art can also be used.

[0074] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are equivalent modifications and evolutions of the above embodiments according to the essential technology of the present application, and these all belong to the protection scope of the present application.

Claims

1. A multi-articulating self-closing hinge, characterized by: The door body fixing seat is provided with a clamping portion, and one side of the cam provided with the arc-shaped convex surface is clamped in the clamping portion when the multi-articulated self-closing hinge is in the closed state, thereby locking the cam.

2. The multi-articulating self-closing hinge of claim 1, wherein: The elastic component includes an elastic piece and a rotating arm, one end of the elastic piece is rotatably arranged in the door body fixing seat, the rotating arm is rotatably connected to the door body fixing seat through a connecting shaft, and opposite ends of the rotating arm are rotatably connected to the other end of the elastic piece and the driving wheel respectively; during the process that the multi-articulated self-closing hinge is forced to open from the closed state to the critical state, the cam is slidably abutted against the driving wheel to make the rotating arm rotate around the connecting shaft, thereby making the elastic piece elastically deform.

3. The multi-articulating self-closing hinge of claim 2, wherein: The rotating arm includes a pair of arm plates and a connecting plate connecting the pair of arm plates, and the pair of arm plates are respectively located at opposite ends of the driving wheel; the arm plates are sleeved on the connecting shaft, and opposite ends of the arm plates are rotatably connected to the elastic piece and the driving wheel respectively.

4. The multi-articulating self-closing hinge of claim 3, wherein: The rotating arm includes a pair of arm plates and a connecting plate connecting the pair of arm plates, and the pair of arm plates are respectively located at opposite ends of the driving wheel; the arm plates are sleeved on the connecting shaft, and opposite ends of the arm plates are rotatably connected to the elastic piece and the driving wheel respectively.

5. The multi-articulating self-closing hinge of claim 3, wherein: ​ 6. The multi-articulating self-closing hinge of claim 2, wherein: ​ 7. The multi-articulating self-closing hinge of claim 6, wherein: ​ 8. The multi-articulating self-closing hinge of claim 6, wherein: The elastic member comprises a mounting seat and a compression spring, the mounting seat comprises a first seat body, a second seat body and an extension component connecting the first seat body and the second seat body, the first seat body is rotatably arranged in the door body fixing seat, and the second seat body is rotatably connected with an end of the rotating arm away from the driving wheel; the compression spring is sleeved on the extension component and elastically abuts against the first seat body and the second seat body.

9. The multi-articulating self-closing hinge of claim 8, wherein: The extension component comprises a fixed rod and a sliding sleeve sleeved on the fixed rod, one of the fixed rod and the sliding sleeve is fixed on the first seat body, and the other is fixed on the second seat body.

10. The multi-articulating self-closing hinge of claim 2, wherein: The multi-articulated self-closing hinge comprises two door body fixing seats and two transmission assemblies corresponding to the two door body fixing seats, the two door body fixing seats are arranged along the width direction of the cabinet body fixing seat, the two transmission assemblies are arranged along the width direction of the cabinet body fixing seat, each transmission assembly is rotatably connected with the cabinet body fixing seat and the corresponding door body fixing seat, and the rebound mechanism is arranged in each door body fixing seat.

11. The multi-articulating self-closing hinge of claim 10, wherein: Each transmission assembly comprises a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece, two ends of the first connecting piece are respectively pivotally connected with the cabinet body fixing seat and the second connecting piece, two ends of the second connecting piece are respectively pivotally connected with the first connecting piece and the corresponding door body fixing seat, two ends of the third connecting piece are respectively pivotally connected with the cabinet body fixing seat and the fourth connecting piece, and two ends of the fourth connecting piece are respectively pivotally connected with the first connecting piece and the corresponding door body fixing seat; the rebound mechanism is connected with the corresponding second connecting piece.

12. The multi-articulating self-closing hinge of claim 11, wherein: One end of the second connecting piece is pivotally connected with the door body fixing seat through a first holding shaft, and the cam is sleeved on the first holding shaft and fixedly connected with the second connecting piece.

13. The multi-articulating self-closing hinge of claim 11, wherein: The speed reduction assembly is arranged in the first connecting piece, and one end of the fourth connecting piece is slidingly abutted against the speed reduction assembly, so that the closing speed of the cabinet hinge is reduced when the cabinet hinge is closed.

14. A refrigerator characterized by comprising: The multi-articulated self-closing hinge comprises a cabinet hinge and a speed reduction assembly, the cabinet hinge comprises a cabinet body fixing seat and a plurality of door body fixing seats, the speed reduction assembly is arranged in the cabinet body fixing seat, and the cabinet hinge comprises a plurality of transmission assemblies, each transmission assembly comprises a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece, two ends of the first connecting piece are respectively pivotally connected with the cabinet body fixing seat and the second connecting piece, two ends of the second connecting piece are respectively pivotally connected with the first connecting piece and the corresponding door body fixing seat, two ends of the third connecting piece are respectively pivotally connected with the cabinet body fixing seat and the fourth connecting piece, and two ends of the fourth connecting piece are respectively pivotally connected with the first connecting piece and the corresponding door body fixing seat; the rebound mechanism is connected with the corresponding second connecting piece. One end of the second connecting piece is pivotally connected with the door body fixing seat through a first holding shaft, and the cam is sleeved on the first holding shaft and fixedly connected with the second connecting piece.

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