CN115807601A - 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, the first direction has a component along a box body towards the direction of the lower hinge shell, and a door body of the refrigerator applying the hinge device can move backwards more at the same door opening angle in the opening process, so that a larger opening area is exposed relative to the existing refrigerator, a larger opening is opened by the door body at the same rotating angle, food taking and placing and observation of the placing condition in the refrigerator are facilitated, a user can operate the refrigerator in a labor-saving mode, and the use experience of the user is improved.

Description

Hinge device and refrigerator

Technical Field

The invention relates to a hinge device, in particular to a refrigerator with the hinge device.

Background

As shown in figure 1, a door body of a conventional refrigerator is turned upwards to be opened, and an opening of a box body below the refrigerator is exposed. In the process of using by users, there are various requirements due to the limitation of scenes, and typical scenes are as follows: the user can expose the opening with the door body upwards rotation, the door body opening angle is bigger, the exposed opening is bigger, but opening angle is bigger, user's arm need move longer distance, also need make bigger power, and when the customer only wanted to get a little article, even only when just only seeing the inside storage condition of freezer, the user does not want to spend bigger power to open the door, so door body rotation angle is bigger to expose the opening, with the user hope to reduce the opening angle and expose and form the contradiction between the bigger opening, user's use experience has been 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.

In order 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 around the lower hinge shell, the upper hinge shell simultaneously moves in a first direction having a component in the direction of the box towards the lower hinge shell.

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;

go up the hinge shell and wind hinge shell pivoted at least some in-process down, it is located the first rear of predetermineeing the face to rotate the instant center, first predetermineeing the face and be for crossing the plane of the back lower extreme of the door body and slope to the back upper place, the first contained angle of predetermineeing face and horizontal plane is 45.

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 instant 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 slot body and the second slot body are provided to one of the lower hinge shell or the upper hinge shell, and the first shaft body and the second shaft body are provided to the other of the lower hinge shell or the upper hinge shell.

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

Compared with the prior art, the invention has the following beneficial effects: the door body of the freezer that utilizes this hinge means is at the in-process of opening, under same angle of opening the door, the door body can more ground rearward movement to expose bigger open area for current freezer, realized that the door body opens bigger opening under same turned angle, be convenient for getting of food put and observe the condition of putting in the freezer, thereby be convenient for the user with mode operation freezer more laborsaving, improved user's use and experienced.

Drawings

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

fig. 2 is a side view of a cooler of one embodiment of the present invention;

FIG. 3 is a side view of a prior art refrigerator door body when opened in comparison to one embodiment of the present invention;

FIG. 4a is a schematic structural diagram of a hinge device according to an embodiment of the present invention;

FIG. 4b is a front view of a hinge assembly according to an embodiment of the present invention;

FIG. 4c is a side view of a hinge assembly according to one embodiment of the present invention;

FIG. 5a is a schematic structural diagram of a hinge device according to an embodiment of the present invention;

FIG. 5b is a side view of a hinge assembly according to one embodiment of the present invention;

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

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

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

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

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 support 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, the door body can be controlled to move backwards in the opening process, and the opening area is larger than that of the existing refrigerator under the same door opening angle, so that the door can be opened conveniently and can be taken conveniently.

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, the inside refrigeration space that encloses of box 300, 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 rotation 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 42 and a second shaft body 41, the second groove 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. 2, 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 on 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 behind the refrigerator 300, and left and right are respectively defined from the front to two sides of the refrigerator 300.

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. 4 a-8, 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 groove body 32 and the second groove body 42 can be designed according to needs, so that the center of circle of the rotation of the upper hinge shell 10 is located at the expected designed position, and the close arrangement of the first shaft body 31 and the second shaft body 41 can not cause overlarge moment, so that the hinge can be thinner, and in addition, particularly, the movement of the door body 200 according with the preset track can be controlled by designing the positions and the shapes of the first groove body 32 and the second groove 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 housing 10 around the lower hinge housing 20, the upper hinge housing 10 simultaneously moves to a first direction, and the first direction has a component in the direction of the box 300 towards the lower hinge housing 20, that is, a backward component, so that the door 200 simultaneously moves backward during the rotation, and it can also be understood that the movement track of the door 200 is the superposition of two movements of upward rotation and backward translation.

Taking the conventional hinge of fig. 1 as an example, when the conventional hinge is installed on a refrigerator, after the door body is completely opened, the distance from any point on the door body to the foremost end of the refrigerator is d, and in this embodiment, the door body 200 is controlled to move backwards simultaneously in the process of overturning, as shown in fig. 2 to 3, when the door body 200 is opened, the distance from any point on the door body 200 to the foremost end of the refrigerator 300 is increased, and the increased amount is represented by d1, that is, when the door body 200 of this embodiment is opened, the distance from the same position on the door body 200 to the foremost end of the refrigerator 300 is d + d1, also referring to the front-back comparison of fig. 3, the dotted line in the figure is the position of the conventional door body, the solid line is the door body 200 of this embodiment, and the circle center of fig. 3 is the instant center of rotation, the door body 200 of this embodiment moves backwards more than the conventional door body, so that when the same door body is opened at the same opening angle, for example, the same opening angle is opened by 45 °, the door body 200 moves backwards more, and the opening area is exposed, thereby saving the door body area, and the opening area is less.

As shown in fig. 4a-6b, the hinge device 100 is shown to rotate from the initial position to the position where the upper hinge housing 10 is completely opened, when the upper hinge housing 10 is turned over to the right position, the upper hinge housing 10 of this embodiment moves backwards a certain distance relative to the existing hinge that rotates only, so as to achieve the effect that the open area of the refrigerator 1000 is larger under the same rotation angle.

In addition, the elastic support portion includes a fixed end fixedly connected to the lower hinge housing 20, a receiving end connected to 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.

At least part of the process that the upper hinge shell 10 rotates around the lower hinge shell 20, the instantaneous center of rotation is located behind the first preset surface, the first preset surface is a plane which passes through the rear lower end of the door body 200 and is inclined towards the rear upper side, the included angle between the first preset surface and the horizontal plane is 45 degrees, the position of the existing door body with the dotted line in fig. 3 after the existing door body is opened is shown, when the position of the instantaneous center of rotation is moved to the rear of the first preset surface, the door body 200 in the embodiment can be driven to move backwards more relative to the existing door body, and therefore a larger opening area is exposed under the same rotation angle.

In fig. 4a-6b, the first groove 32 and the second groove 42 are designed in such a way that the position of the instant center of rotation in at least part of the process is set behind the first predetermined plane 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 non-pure sliding rolling and the three-center theorem of the first shaft 31 and the second shaft 41 in the groove, 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 falls behind the first predetermined plane.

Further, as shown in fig. 4a-6b, 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. 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 penetrates through the opening, the elastic member 72 can be a spring, supporting sleeves can be arranged at the upper end and the lower end of the spring, as shown in fig. 4a, the supporting sleeve at the lower part is abutted against the supporting beam 73 around the opening, and the supporting sleeve at the upper part is abutted 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 support rod 71 moves upwards under the driving of the spring, the spring releases partial 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 labor-saving effect of opening the door is achieved, and the hovering effect of the door body 200 is supported.

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

in one embodiment thereof:

as shown in fig. 4a-6b, 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 member 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 linear groove formed in a pair of side walls of the lower hinge case 20 which are opposed to each other, and the sliding shaft 61 moves up and down in the groove in the up-down direction. 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. 7, 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 element 50 includes a receiving end pivotally connected to the third shaft body 80, and the connecting element 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 the 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 material strength requirements of this embodiment are relatively low.

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. 4a to 7, 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 slot 32 and the second slot 42 are both located on the lower hinge shell 20, as shown in fig. 4a to 6b, the first shaft 31 and the second shaft 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. 7, 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. 8, 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 instant center of rotation of the upper hinge shell 10 and the lower hinge shell 20, which is in motion during at least part of the rotation of the upper hinge shell 10 about 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 after being turned, the position of the door body 200 after being turned and opened can be located more backward than the existing position by controlling the positions of different instantaneous centers, that is, in the process of rotating the door body 200, the position of the instantaneous center of rotation can be changed, and in the process of changing, at least after the instantaneous center of rotation is controlled on a first preset surface in a certain area, the door body 200 can be moved backward in at least part of the positions in the process of rotating.

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

the door body 200 of the refrigerator 1000 of the hinge device 100 is in the opening process, and under the same door opening angle, the door body 200 can move backwards more, thereby exposing a larger opening area relative to the existing refrigerator, realizing that the door body 200 opens a larger opening under the same rotating angle, facilitating the taking and placing of food and observing the placing condition in the refrigerator 1000, facilitating the operation of the user on the refrigerator 1000 in a more labor-saving manner, and improving the use experience of the user.

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 (10)

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 around the lower hinge shell, the upper hinge shell simultaneously moves in a first direction having a component in the direction of the box towards the lower hinge shell.

2. The hinge assembly as claimed in 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 rear 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 included angle of predetermineeing face and horizontal plane is 45.

3. The hinge device as claimed in claim 2, wherein the first shaft body forms a first common normal line with the first groove body at a contact position, the second shaft body forms a second common normal line with the second groove body at a contact position, 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 slot is disposed in the lower hinge shell, the elastic support portion further comprises a linkage portion, 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 the limiting part 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.

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