CN115807594A - Hinge device and refrigerator - Google Patents

Abstract

The invention discloses a hinge device and a refrigerator, wherein the hinge device comprises a lower hinge shell, an upper hinge shell, a first rotating part, a second rotating part and an elastic supporting part, wherein the upper hinge shell simultaneously moves towards a first direction, and the first direction has a component towards the direction of a box body along the lower hinge shell; the door body of the freezer applying the hinge device can make the door body move forwards simultaneously in the opening process, so that when the door body is completely opened, the space occupation of the door body to the rear part of the freezer is reduced, the door body can be placed close to a wall body, the influence of insufficient reserved space at the rear part of the freezer on the angle opening of the door body is reduced, and the use experience of a user is improved.

Description

Hinge device and refrigerator

Technical Field

The present disclosure relates to a hinge device, and more particularly, to a refrigerator with the hinge device.

Background

As shown in figures 1 and 2, a door body of the existing refrigerator is turned upwards and opened, and an opening of a box body below the refrigerator is exposed. In the process of using by a user, various requirements can exist due to the limitation of scenes, and typical scenes are as follows: the user hopes to place the refrigerator backwards against the wall as much as possible, but the refrigerator is limited by the thickness of the hinge and the structure of the hinge, so that enough space needs to be reserved behind the refrigerator to ensure the normal opening of the door body, and the space behind the refrigerator is wasted; correspondingly, when the user puts the freezer closer to the wall body, the opening angle of the door body can be limited, the user is limited from taking out food materials from the opening, and the use experience of the user is influenced.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a hinge device and a refrigerator with the same.

To achieve the above object, according to one embodiment of the present invention, there is provided a hinge device including:

a lower hinge housing for connecting the case;

the upper hinge shell is used for connecting the door body;

the first rotating part comprises a first groove body and a first shaft body, and the first groove body limits the sliding distance of the first shaft body;

the second rotating part comprises a second groove body and a second shaft body, the second groove body limits the sliding distance of the second shaft body, and the upper hinge shell is rotatably connected to the lower hinge shell through the first rotating part and the second rotating part;

the elastic supporting part comprises a fixed end fixedly connected with the lower hinge shell, a bearing end connected with the first rotating part or the second rotating part, and an elastic supporting part arranged between the fixed end and the bearing end;

during at least part of the rotation of the upper hinge shell about the lower hinge shell, the upper hinge shell simultaneously moves in a first direction having a component in a direction along the lower hinge shell toward the container body.

As a further improvement of the present invention, the first shaft body is parallel to the second shaft body, and the first rotating part and the second rotating part together define a rotation instant center of the upper hinge shell and the lower hinge shell;

at least part of the process that the upper hinge shell rotates around the lower hinge shell, the instant center of rotation is located in front of a first preset surface, and the first preset surface is a plane which passes through the rear lower end of the door body and inclines 45 degrees to the rear upper side.

As a further improvement of the present invention, a contact position of the first shaft body and the first groove body forms a first common normal line, a contact position of the second shaft body and the second groove body forms a second common normal line, and the instantaneous center of rotation is an intersection point of the first common normal line and the second common normal line.

As a further improvement of the present invention, the elastic supporting member includes a supporting beam, a supporting rod, and an elastic member sleeved outside the supporting rod, the supporting beam includes the fixed end connected to the lower hinge shell, one end of the elastic member is fixed to the supporting beam, and the other end of the elastic member abuts against the supporting rod.

As a further improvement of the present invention, the support rod includes the receiving end connected to the first shaft body or the second shaft body.

As a further improvement of the present invention, the first groove and the second groove are provided in one of the lower hinge shell or the upper hinge shell, and the first shaft body and the second shaft body are provided in the other of the lower hinge shell or the upper hinge shell.

As a further improvement of the present invention, the first groove body and the second shaft body are provided to one of the lower hinge housing or the upper hinge housing, and the first shaft body and the second groove body are provided to the other of the lower hinge housing or the upper hinge housing.

As a further improvement of the present invention, the first shaft is disposed on the upper hinge shell, the first groove is disposed on the lower hinge shell, the elastic support portion further includes a linkage portion, and the linkage portion includes:

the sliding shaft is connected to the lower hinge shell in a sliding mode and is parallel to the first shaft body;

the connecting piece comprises a bearing end which is pivotally connected with the first shaft body, and the connecting piece is also pivotally connected with the sliding shaft;

and a limiting part which is arranged on the lower hinge shell and limits the movement direction of the sliding shaft.

As a further improvement of the present invention, the first rotating part or the second rotating part further includes a third shaft body parallel to the first shaft body and the second shaft body, and the third shaft body is fixedly connected to the upper hinge housing;

the elastic support portion further includes a linkage portion including:

the sliding shaft is connected to the lower hinge shell in a sliding mode and is parallel to the third shaft body;

the connecting piece comprises a bearing end which is pivotally connected with the third shaft body, and the connecting piece is also pivotally connected with the sliding shaft;

and a limiting part which is arranged on the lower hinge shell and limits the movement direction of the sliding shaft.

In order to achieve one of the above objects, an embodiment of the present invention provides a refrigerator, which includes the above hinge device.

The refrigerator comprises a refrigerator body and a door body, wherein the refrigerator body comprises a rear wall, and when the door body is completely opened, the distance between the end part of the door body far away from the rear wall and the rear wall is smaller than the thickness of the door body.

Compared with the prior art, the invention has the following beneficial effects: the door body of the freezer that utilizes this hinge means can make the door body move forward simultaneously at the in-process of opening to when the door body is opened completely, reduced the door body and taken the space at freezer rear, the door body can be more close to the wall body and put, has also reduced the not enough influence of opening the angle to the door body in freezer rear reserved space, has improved user's use and has experienced.

Drawings

Fig. 1 is a side view of a prior art cooler;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic view of a refrigerator according to an embodiment of the present invention;

fig. 4 is a side view of a cooler of one embodiment of the present invention;

FIG. 5 is a partial enlarged view at B in FIG. 4;

FIG. 6a is a schematic view of a hinge device according to an embodiment of the present invention;

FIG. 6b is a front view of a hinge assembly according to an embodiment of the present invention;

FIG. 6c is a side view of a hinge assembly according to one embodiment of the present invention;

FIG. 7a is a schematic view of a hinge device according to an embodiment of the present invention;

FIG. 7b is a side view of a hinge assembly according to one embodiment of the present invention;

FIG. 8a is a schematic view of a hinge device according to an embodiment of the present invention;

FIG. 8b is a side view of a hinge assembly according to one embodiment of the present invention;

FIG. 9 is a schematic structural view of a hinge device according to another embodiment of the present invention;

FIG. 10 is a schematic view of a hinge assembly according to still another embodiment of the present invention;

figure 11 is a side view of a prior art door body in comparison to one embodiment of the present invention when the refrigerator door body is opened;

1000, a refrigerator; 100. a hinge device; 200. a door body; 300. a box body; 10. an upper hinge shell; 20. a lower hinge shell; 31. a first shaft body; 32. a first tank body; 41. a second shaft body; 42. a second tank body; 50. a connecting member; 61. a sliding shaft; 62. a limiting part; 71. a support bar; 72. an elastic member; 73. a supporting beam; 80. and a third shaft body.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

It will be understood that terms used herein such as "upper," "above," "lower," "below," and the like, refer to relative positions in space and are used for convenience in description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

According to the hinge device and the refrigerator with the hinge device, the structure of the hinge is redesigned, so that the occupation of the rear space of the refrigerator in the opening process of the door body can be controlled, the refrigerator can be placed closer to a rear wall, and the waste of the space is reduced.

This hinge means 100 also can install on equipment such as refrigerator, vertical freezer, gradevin, dish washer, microwave oven, provides a freezer 1000 in this embodiment, including door body 200 and box 300, and box 300 is inside to enclose out the refrigeration space, and door body 200 seals the refrigeration space, is connected through hinge means 100 between door body 200 and the box 300, and hinge means 100 supports opening and closing of door body 200.

The hinge device 100 of the present embodiment includes a lower hinge housing 20, an upper hinge housing 10, a first rotating part, a second rotating part, and an elastic support part. The first rotating portion includes a first groove 32 and a first shaft body 31, the first groove 32 defines a sliding distance of the first shaft body 31; the second rotation part includes a second groove body 42 and a second shaft body 41, the second groove body 42 defines a sliding distance of the second shaft body 41, and the upper hinge case 10 is rotatably connected to the lower hinge case 20 through the first rotation part and the second rotation part.

As shown in fig. 3 to 5, in order to clearly express the position and direction described in this embodiment, taking a horizontal refrigerator 1000 as an example, the opening of the refrigerator 1000 is defined to be upward, and the opposite direction is defined as downward, the door 200 is located above the refrigerator 300, the user is located at one side of the refrigerator 300 away from the hinge device 100 to operate the refrigerator 1000, the user is defined to be located in front of the refrigerator 1000, the hinge device 100 is located at the back of the refrigerator 300, and the two sides of the refrigerator 300 from the front are respectively defined as left and right.

The first shaft 31 can slide out a distance in the first slot 32 and the second shaft 41 can slide out a distance in the second slot 42, i.e. the first slot 32 and the second slot 42 are not circular slots but slots with a length, as shown in fig. 5 or 6a, the shaft can move from one end to the other end in the slots. In the process of sliding the first shaft body 31 and the second shaft body 41, the upper hinge shell 10 is turned around the lower hinge shell 20, and in the whole turning process, the upper hinge shell 10 does not always rotate around the first shaft body 31 or the second shaft body 41, but is turned over under the limitation of the first shaft body 31, the first groove body 32, the second shaft body 41 and the second groove body 42.

When the upper hinge shell 10 rotates around the first shaft body 31 and the second shaft body 41 simultaneously, the shapes of the first chute body 32 and the second chute body 42 can be designed as required, so that the center of a circle of the rotation of the upper hinge shell 10 is located at a position of an expected design, and the close arrangement of the first shaft body 31 and the second shaft body 41 does not cause too large moment, so that the hinge can be made thinner, and in addition, particularly, the movement of the door body 200 according with a preset track can be controlled by designing the positions and the shapes of the first chute body 32 and the second chute body 42.

In addition, the first shaft 31 and the second shaft 41 of the present embodiment are merely distinguished as names, and similarly, the first groove body 32 and the second groove body 42 are also distinguished as names for explaining that there are two shafts that can slide a distance in the grooves. The second shaft 41 may also be referred to as the first shaft 31, and the second groove 42 may also be referred to as the first groove 32.

During at least part of the rotation of the upper hinge case 10 about the lower hinge case 20, the upper hinge case 10 is simultaneously moved in a first direction having a component in a direction toward the case 300 along the lower hinge case 20. In this embodiment, the lower hinge shell 20 faces the box 300, that is, the lower hinge shell points forward from the rear, so that the door 200 moves forward simultaneously during the rotation process, and it can be understood that the movement track of the door 200 is the superposition of two movements of upward rotation and forward translation.

At least partial in-process that last hinge shell 10 rotated around lower hinge shell 20, the rotation instant center is located the place ahead of first preset face, first preset face is the plane that crosses the back lower extreme of door body 200 and slope to the back top, the contained angle of first preset face and horizontal plane is 45, as shown in fig. 11, the position after the dotted line was opened for current door body in the picture, the centre of a circle is the position of rotation instant center, when moving the position of rotating the instant center to the place ahead of first preset face, can drive the forward motion more for current door body with the door body 200 of this embodiment, thereby make the length that the door body 200 stretches out backward reduce, occupation reduction to the rear space.

Taking the conventional hinge shown in fig. 1 and 2 as an example, when the conventional hinge is installed on a refrigerator, after the door 200 is opened, the distance between the door 200 at the position farthest from the cabinet 300 and the rear wall of the cabinet 300 is generally 60mm, that is, when the door 200 is closed, the distance between the cabinet 300 and the rear wall is at least 60 mm.

And control door body 200 is simultaneously forward motion at the in-process of upset in this embodiment, as shown in fig. 3 ~ 5, when can making door body 200 open, the distance between the position that door body 200 is furthest apart from box 300 and the box 300 back wall shortens to about 30mm to when making freezer 1000 put, the distance control of freezer 1000's rear side and wall body about 30mm can, greatly reduced the space that needs the reservation behind freezer 1000, reduced the waste of space size.

As shown in fig. 6a-8b, the hinge device 100 is shown to rotate from the initial position to the position where the upper hinge shell 10 is completely opened, when the upper hinge shell 10 is turned over to the right position, the upper hinge shell 10 of the present embodiment moves forward for a certain distance relative to the existing hinge that rotates purely, and the reduction of the occupancy of the rear space is achieved.

In addition, the elastic support portion includes a fixed end fixedly connected with the lower hinge housing 20, a receiving end connected with the first rotating portion or the second rotating portion, and an elastic support member disposed between the fixed end and the receiving end. One end of the elastic supporting piece is supported at the fixed end, and the other end of the elastic supporting piece is connected to the first rotating part or the second rotating part, so that the elastic supporting piece can support the first rotating part or the second rotating part and plays a role in supporting the door body 200 to suspend.

The elastic supporting part is supported by the fixed end, the sliding end moves parallel to the connecting plate of the box body 300 along with the movement of the sliding shaft 61, namely, the movement in the direction vertical to the connecting plate of the box body 300 is avoided, the moving space required in the door is reduced, the thickness of the hinge can be reduced, the downward gravity of the door body 200 is applied to the first rotating part and the second rotating part in the upward opening process of the door body 200, and the elastic supporting part is connected with the first rotating part or the second rotating part to support the first rotating part or the second rotating part.

In fig. 6a-8b, the first groove 32 and the second groove 42 are designed such that the position of the instant center of rotation of at least part of the process is located in front of the first predetermined surface according to the above requirement, so the track of the first groove 32 and the second groove 42 is the position of the instant center of rotation required to meet the requirement, according to the principles that the first shaft 31 and the second shaft 41 roll in the groove and the three centers, the contact position of the first shaft 31 and the first groove 32 forms a first common normal line, the contact position of the second shaft 41 and the second groove 42 forms a second common normal line, and the instant center of rotation is the intersection point of the first common normal line and the second common normal line. Therefore, the first and second grooves 32 and 42 are traced such that the intersection of the common normal lines at the target position is located in front of the first predetermined plane.

Further, as shown in fig. 6a-8b, the elastic supporting element includes a supporting beam 73, a supporting rod 71, and an elastic element 72 sleeved outside the supporting rod 71, the supporting beam 73 includes a fixed end connected to the lower hinge shell 20, one end of the elastic element 72 is fixed to the supporting beam 73, and the other end of the elastic element is abutted against the supporting rod 71. The two ends of the supporting beam 73 are respectively connected to a pair of opposite side walls of the lower hinge shell 20, an opening is formed in the supporting beam 73, the supporting rod 71 passes through the opening, the elastic member 72 can be a spring, the upper end and the lower end of the spring can be provided with supporting sleeves, as shown in fig. 6a, the lower supporting sleeve abuts against the supporting beam 73 around the opening, and the upper supporting sleeve abuts against a protrusion extending from the supporting rod 71.

The spring is always in a compressed state, under the elastic action of the spring, when the upper hinge shell 10 turns upwards, the supporting rod 71 moves upwards under the driving of the spring, the spring releases part of the elastic force, and the spring is still in a compressed state, so that the upper hinge shell 10 can be supported to be opened, the door opening labor is saved, and the door body 200 is supported to hover.

The specific structure of the elastic support part has various embodiments:

in one embodiment thereof:

as shown in fig. 6a to 8b, the first shaft 31 is disposed on the upper hinge shell 10, the first groove 32 is disposed on the lower hinge shell 20, the elastic support portion further includes a linkage portion, the linkage portion includes a sliding shaft 61, a connecting piece 50 and a limiting portion 62, the sliding shaft 61 is slidably connected to the lower hinge shell 20 and is parallel to the first shaft 31; the connecting member 50 includes a receiving end pivotally connected to the first shaft body 31, and the connecting member 50 is also pivotally connected to the sliding shaft 61; the stopper 62 is provided to the lower hinge case 20 and defines a moving direction of the sliding shaft 61. Two sets of round holes have been seted up on connecting piece 50, first axis body 31 passes a set of round hole, sliding shaft 61 passes another group's round hole, and first axis body 31 and sliding shaft 61 all can be at the round hole internal rotation, and when bracing piece 71 upward movement under the effect of spring, promote sliding shaft 61 along spacing 62 upward movement, sliding shaft 61 promotes connecting piece 50 motion, and connecting piece 50 is connecting first axis body 31 and is driving the motion of first axis body 31, is supporting the motion of upper hinge shell 10 then.

The stopper 62 is formed as a pair of linear grooves formed in the side walls of the lower hinge case 20, which are opposite to each other, and the sliding shaft 61 moves up and down in the vertical groove. In addition, the stopper 62 may be provided on a bottom wall connecting the two side walls.

In another embodiment:

the difference from the previous embodiment is that the connecting element 50 is not connected to the first shaft 31 or the second shaft 41, but is connected to the third shaft 80 on the upper hinge housing 10, as shown in fig. 9, the first rotating part or the second rotating part further includes the third shaft 80 parallel to the first shaft 31 and the second shaft 41, and the third shaft 80 is fixedly connected to the upper hinge housing 10.

The elastic support part further comprises a linkage part, the linkage part comprises a sliding shaft 61, a connecting piece 50 and a limiting part 62, and the sliding shaft 61 is connected to the lower hinge shell 20 in a sliding mode and is parallel to the third shaft body 80; the connecting member 50 includes a receiving end pivotally connected to the third shaft body 80, and the connecting member 50 is also pivotally connected to the sliding shaft 61; the stopper 62 is provided to the lower hinge case 20 and defines a moving direction of the sliding shaft 61. Therefore, the elastic force of the spring is released to the upper hinge shell 10 through the third shaft body 80, and then the first shaft body 31 and the second shaft body 41 release force, so that the stress of the first shaft body 31 and the second shaft body 41 is more uniform, and the force shared by each shaft body is smaller. In the above embodiment, the force is transmitted to the first shaft 31, and then is released to the second shaft 41 through the upper hinge shell 10, so that the force applied to the first shaft 31 is greater than that applied to the second shaft 41, and the requirement on the material strength of the first shaft 31 is higher. The requirements on the strength of the material are relatively low for this embodiment.

In the above two embodiments, the support rod 71 can move linearly in the up-and-down direction.

In other embodiments:

the supporting rod 71 includes a direct receiving end connected to the first shaft 31 or the second shaft 41, and in this embodiment, the supporting rod 71 swings back and forth while moving up and down, but the sliding shaft 61, the limiting portion 62 and the connecting member 50 are eliminated, so the structure is simpler, but the thickness of the hinge is increased by the back and forth swing of the supporting rod 71.

In addition, various embodiments also exist in the concrete connection mode of the first rotating part and the second rotating part:

in one embodiment thereof:

as shown in fig. 6a to 9, the first slot 32 and the second slot 42 are disposed on one of the lower hinge shell 20 or the upper hinge shell 10, and the first shaft 31 and the second shaft 41 are disposed on the other of the lower hinge shell 20 or the upper hinge shell 10, at this time, the structural layout is clear.

When the first and second slots 32 and 42 are located on the lower hinge shell 20, as shown in fig. 6a to 8b, the first and second shaft bodies 31 and 41 are both disposed on the upper hinge shell 10, and may extend outward from both sides of the upper hinge shell 10, or may penetrate through the upper hinge shell 10 as shown in the figure.

When the first slot 32 and the second slot 42 are both located on the upper hinge shell 10, as shown in fig. 9, the first shaft 31 and the second shaft 41 are both disposed on the lower hinge shell 20, and pass through the slot on the upper hinge shell 10 between the first shaft and the second shaft, and may extend outward from both sides of the upper hinge shell 10, or may pass through the upper hinge shell 10 as shown in the figure.

In another embodiment:

as shown in fig. 10, the first groove 32 and the second groove 41 are disposed in one of the lower hinge shell 20 or the upper hinge shell 10, and the first shaft 31 and the second groove 42 are disposed in the other of the lower hinge shell 20 or the upper hinge shell 10, which is different from the previous embodiment, so that a groove is formed near one groove, and conversely, if two grooves are formed in one plate at the same time, the distance between the two grooves cannot be too close to each other, otherwise, the position closest to the two grooves is deformed and fails; on the other hand, the requirement on the strength of the material is high, and deformation is prevented.

In the solution of this embodiment, for example, the upper hinge shell 10 is provided with a first slot 32, the lower hinge shell 20 is provided with a second slot 42, and the two slots are respectively provided on the two plate bodies, so that on one hand, there is no problem that the two slots cannot be too close to each other, and thus the size of the hinge device 100 can be made thinner, and on the other hand, because the holes dug on each plate are fewer, the supporting effect is better, and the hinge device is not easy to deform, and the requirement for the material strength of the hinge device 100 is lowered.

Further, the first shaft body 31 is parallel to the second shaft body 41, and the first rotating part and the second rotating part together define a rotation instant center of the upper hinge shell 10 and the lower hinge shell 20, and the rotation instant center is in a moving state during at least part of the rotation of the upper hinge shell 10 around the lower hinge shell 20. Because the instantaneous centers can move, the motion track of the door body 200 does not simply turn around a certain fixed point, but at least two circle centers at different positions exist in the space, the door body 200 rotates around one of the instantaneous centers and then rotates around the other instantaneous center, and therefore the motion track of the door body 200 can be more in line with the expectation.

Correspondingly, in the process of instantaneous center movement of the upper hinge shell 10, the instantaneous center of rotation of the door body 200 is changed, and since the door body 200 is fixed with the upper hinge shell 10 and the box body 300 is fixed with the lower hinge shell 20, the instantaneous centers of the upper hinge shell 10 and the lower hinge shell 20, that is, the instantaneous center of rotation of the door body 200 around the box body 300, that is, the instantaneous centers of rotation of the door body 200 and the box body 300 are in a motion state. For example, relative to the position of the existing door body in fig. 1 and 2 after being turned over, by controlling the positions of different instant centers, the position of the door body 200 after being turned over and opened may be further ahead than the existing position, that is, during the rotation of the door body 200, the position of the instant center of rotation may be changed, and during the change, the instant center of rotation is controlled in front of the first preset surface at least in a certain area, so that during the rotation of the door body 200, at least in part of the position, the door body may move forward.

Compared with the prior art, the embodiment has the following beneficial effects:

the door body 200 of the refrigerator 1000 using the hinge device 100 can move forward simultaneously in the opening process of the door body 200, so that when the door body 200 is completely opened, the space occupation of the door body 200 to the rear of the refrigerator 1000 is reduced, the door body 200 can be placed closer to a wall body, the influence of insufficient reserved space at the rear of the refrigerator 1000 on the opening angle of the door body 200 is also reduced, and the use experience of a user is improved.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (11)

1. A hinge device, characterized in that it comprises:

a lower hinge housing for connecting the case;

the upper hinge shell is used for connecting the door body;

the first rotating part comprises a first groove body and a first shaft body, and the first groove body limits the sliding distance of the first shaft body;

the second rotating part comprises a second groove body and a second shaft body, the second groove body limits the sliding distance of the second shaft body, and the upper hinge shell is rotatably connected to the lower hinge shell through the first rotating part and the second rotating part;

the elastic supporting part comprises a fixed end fixedly connected with the lower hinge shell, a bearing end connected with the first rotating part or the second rotating part, and an elastic supporting part arranged between the fixed end and the bearing end;

during at least part of the rotation of the upper hinge shell about the lower hinge shell, the upper hinge shell simultaneously moves in a first direction having a component in a direction along the lower hinge shell towards the box.

2. The hinge assembly of claim 1, wherein the first shaft body is parallel to the second shaft body, the first rotating portion and the second rotating portion together defining a instant center of rotation of the upper hinge shell and the lower hinge shell;

go up the hinge shell and wind hinge shell pivoted at least partial in-process down, the rotation instant center is located the place ahead of first predetermined face, first predetermined face is for crossing the plane of the back lower extreme of the door body and slope to the back top, the first predetermined face is 45 with the contained angle of horizontal plane.

3. The hinge device according to claim 2, wherein a contact position of the first shaft body with the first groove forms a first common normal line, a contact position of the second shaft body with the second groove forms a second common normal line, and the instant center of rotation is an intersection point of the first common normal line and the second common normal line.

4. The hinge assembly as claimed in claim 1, wherein the elastic supporting member includes a supporting beam, a supporting rod, and an elastic member sleeved outside the supporting rod, the supporting beam includes the fixed end connected to the lower hinge housing, one end of the elastic member is fixed to the supporting beam, and the other end of the elastic member abuts against the supporting rod.

5. The hinge assembly of claim 4, wherein the support rod includes the receiving end coupled to the first shaft body or the second shaft body.

6. The hinge assembly of claim 1, wherein the first and second slots are disposed in one of the lower hinge housing or the upper hinge housing, and the first and second shafts are disposed in the other of the lower hinge housing or the upper hinge housing.

7. The hinge assembly of claim 1, wherein the first and second shafts are disposed in one of the lower or upper hinge shells and the first and second shafts are disposed in the other of the lower or upper hinge shells.

8. The hinge device of claim 1, wherein the first shaft is disposed in the upper hinge shell, the first groove is disposed in the lower hinge shell, the elastic support portion further comprises a linkage portion, and the linkage portion comprises:

the sliding shaft is connected to the lower hinge shell in a sliding mode and is parallel to the first shaft body;

the connecting piece comprises a bearing end which is pivotally connected with the first shaft body, and the connecting piece is also pivotally connected with the sliding shaft;

and the limiting part is arranged on the lower hinge shell and limits the movement direction of the sliding shaft.

9. The hinge assembly of claim 1, wherein the first or second rotating portion further comprises a third shaft body parallel to the first and second shaft bodies, the third shaft body being fixedly connected to the upper hinge housing;

the elastic support portion further includes a linkage portion including:

the sliding shaft is connected to the lower hinge shell in a sliding mode and is parallel to the third shaft body;

the connecting piece comprises a bearing end which is pivotally connected with the third shaft body, and the connecting piece is also pivotally connected with the sliding shaft;

and a limiting part which is arranged on the lower hinge shell and limits the movement direction of the sliding shaft.

10. A refrigerator comprising a hinge assembly as claimed in any one of claims 1 to 9.

11. The refrigerator of claim 10 comprising a cabinet and a door, wherein the cabinet comprises a rear wall, and when the door is fully opened, the distance between the end of the door far away from the rear wall and the rear wall is smaller than the thickness of the door.

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