Refrigerator

Abstract

A refrigerator (1) includes a box (10), a hinge assembly (30), and a door (20). The hinge assembly (30) includes a first track groove (433), a second track groove (434), a first shaft (421), and a second shaft (422). The door (20) is connected to the box (10) via the hinge assembly (30). A plane on which a side of the box (10) close to the hinge assembly (30) is located is defined as a reference plane (M0). An included angle between a moving direction of the positioning center point (P) and a moving direction of the guide center point (Q) is defined as a displacement included angle. During the process of the door body (20) opening from a closed state through a first angle to a second angle, the guide center point (Q) of the second shaft (422) moves along the second locus line (K) of the second locus groove (434), and the positioning center point (P) of the first shaft (421) moves from one end to the other end of the straight locus segment of the first locus groove (433), so that the door body (20) moves inward during the rotation process, and the difference between the displacement angles when the door body (20) opens to any two angles is less than or equal to a preset angle.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims priority based on Chinese patent applications with application numbers 202210464946.8 filed on April 29, 2022, 202210464670.3 filed on April 29, 2022, 202210464933.0 filed on April 29, 2022, 202111104648.X filed on September 18, 2021, and 202111098814.X filed on September 18, 2021, and all of their disclosure contents are incorporated herein by reference.

[0002] This disclosure relates to the technical field of household electrical appliances, and particularly to refrigerators.

Background Art

[0003] In family life, refrigerators have become one of the household appliances necessary for each family. Due to the needs for indoor aesthetics and simplicity, the number of consumers choosing built - in refrigerators is increasing.

[0004] A built - in refrigerator is fitted into the cabinet where the refrigerator is aligned, and a heat dissipation cycle is formed by the floor feet, the back panel, and the top panel, so that a small gap can be left between the left and right side walls of the refrigerator and the inner wall of the cabinet.

Summary of the Invention

Means for Solving the Problems

[0005] A refrigerator is provided, and the refrigerator includes a box body, a hinge assembly, and a door body. The hinge assembly includes a first track groove, a second track groove, a first shaft, and a second shaft. The central track line of the first track groove is a first track line, and the first track line includes a linear track segment. The central track line of the second track groove is a second track line. The first shaft is fitted with the first track groove, and the orthographic projection of the central axis of the first shaft on the groove bottom of the first track groove is a positioning center point. The second shaft is fitted with the second track groove, and the orthographic projection of the central axis of the second shaft on the groove bottom of the second track groove is a guide center point. The door body is connected to the box body through the hinge assembly and opens and closes the box body. The door body includes a door side wall, and the door side wall is a side wall of the door body close to the hinge assembly. A plane where a side surface of the box body close to the hinge assembly is located is defined as a reference plane, and a side of the reference plane close to the box body is defined as the inner side. The first shaft and the second shaft are fixed to the box body. The first track groove and the second track groove are fixed to the door body. One end of the linear track segment is farther from the door side wall than the other end of the linear track segment. In the process of the door body opening from the closed state through a first angle to a second angle, the guide center point moves along the second track line, and the positioning center point moves from one end of the linear track segment to the other end of the linear track segment, so that the door body moves inward during the rotation process. The moving direction of the positioning center point is defined as a first displacement direction, the moving direction of the guide center point is defined as a second displacement direction, and the included angle between the first displacement direction and the second displacement direction is defined as a displacement included angle. In the process of the door body opening from the closed state through the first angle to the second angle, the difference between the displacement included angles when the door body is opened to any two angles is not more than a preset angle.

Brief Description of the Drawings

[0006] To more clearly illustrate the invention in the present disclosure, the drawings used in some embodiments of the present disclosure will be briefly described.

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Mode for Carrying Out the Invention

[0007] Hereinafter, with reference to the drawings, some embodiments of the present disclosure will be clearly and completely described. Of course, the embodiments described here are only a part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments conceivable to those skilled in the art shall be included in the scope of the present disclosure.

[0008] Unless otherwise indicated in the context, in this specification and the claims, the term "comprise" and its other forms, such as the third-person singular form "comprises" and the present participle form "comprising", should be construed in an open, inclusive sense, that is, "including but not limited to". In the description of the specification, terms such as "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples" are intended to indicate that a particular feature, structure, material, or property related to this embodiment or its example is included in at least one embodiment or example of the present disclosure. The schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described particular features, structures, materials, or properties may be included in any one or more embodiments or examples in any suitable manner.

[0009] In the following, the terms "first" and "second" are for illustrative purposes only and should not be construed as indicating or implying relative importance or as implying the quantity of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the embodiments of the present disclosure, unless otherwise specified, "a plurality" means two or more.

[0010] When describing some embodiments, the terms "coupled", "connected", and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components have direct physical or electrical contact with each other. Or, when describing some embodiments, the term "coupled" may be used to indicate that two or more components have direct physical or electrical contact with each other. However, the term "coupled" or "communicatively coupled" may mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this specification.

[0011] "At least one of A, B, and C" has the same meaning as "at least one of A, B, or C", and both include the following combinations of A, B, and C: only A, only B, only C, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0012] "A and / or B" includes three combinations: only A, only B, and the combination of A and B.

[0013] As used herein, the use of "apply to..." or "be arranged to..." means open and inclusive language and does not exclude an apparatus that is applied or arranged to perform additional tasks or steps.

[0014] As used herein, "about", "approximately", or "nearly" includes the stated value and the average value within an acceptable deviation range of the specific value, where the acceptable deviation range is determined in consideration of the errors associated with the measurements being considered by those skilled in the art and the measurements of the specific quantity (i.e., the limitations of the measurement system).

[0015] As used in this specification, "parallel", "perpendicular", and "equal" include the described situations and situations approximating the described situations, and the range of these approximating situations is within an acceptable deviation range, and the acceptable deviation range is determined in consideration of errors related to the measurements being considered by those skilled in the art and the measurements of specific quantities (i.e., the limitations of the measurement system). For example, "parallel" includes true parallel and substantially parallel, where the acceptable deviation range for substantially parallel is, for example, a deviation within 5°, "perpendicular" includes true perpendicular and substantially perpendicular, and the acceptable deviation range for substantially perpendicular may be, for example, a deviation within 5°. "Equal" includes absolutely equal and approximately equal, where within the acceptable deviation range of approximately equal, for example, the difference between the two equal ones is less than 5% of either one or equal.

[0016] For the sake of convenience in description, unless otherwise specified, for the directional expressions of up, down, left, right, front, and back in this disclosure, all refer to the state when the refrigerator is in use. When the refrigerator is in use, the side facing the user is the front side, and the opposite side is the back side. The height direction of the refrigerator is the up-down direction. The left-right direction of the refrigerator is opposite to the left-right direction of the user. For example, the left side of the refrigerator is the right side of the user, and the right side of the refrigerator is the left side of the user.

[0017] In some embodiments of the present disclosure, a refrigerator 1 is provided. Referring to FIGS. 1 and 2, the refrigerator 1 includes a box body 10, a door body 20, and a hinge assembly 30.

[0018] The box body 10 includes an inner container, a housing, and a heat insulation layer. The inner container has a substantially rectangular box shape, and a storage chamber is defined inside the box body 10. The shape of the housing matches the shape of the inner container, and the inner container is installed inside the housing. The heat insulation layer is disposed between the inner container and the housing to block heat transfer between the storage chamber and the external space of the box body 10.

[0019] In some embodiments, the refrigerator 1 further includes a cooling device configured to supply cold air to the storage chamber. One side (e.g., the front side) of the storage chamber is open, and an access opening is formed. The storage chamber is configured to store food, and a user can put food into the storage chamber or take food out of the storage chamber through the access opening.

[0020] In some embodiments, the storage chamber may be partitioned into a refrigerating chamber and a freezing chamber. The refrigerating chamber may keep the temperature of the air inside it at about 0°C to 5°C and store food in the refrigerating mode. The freezing chamber may keep the temperature of the air inside it at about -30°C to 0°C and store food in the freezing mode. Also, the cabinet 10 may include other chambers, such as a vacuum chamber, a constant temperature chamber, etc.

[0021] In some embodiments, the refrigerating chamber and the freezing chamber are arranged along the height direction of the refrigerator 1. For example, the refrigerating chamber is below the freezing chamber. Note that in some embodiments, the refrigerating chamber and the freezing chamber may be arranged in other ways, but are not limited in the present disclosure.

[0022] The door body 20 is connected to one end (e.g., the front end) of the cabinet 10 via a hinge assembly 30. The door body 20 may open and close the storage chamber by rotating. When the door body 20 is open, the access opening enables the access of food.

[0023] Referring to FIG. 1, the hinge assembly 30 is, for example, a first hinge assembly 40 or a second hinge assembly 50. The first hinge assembly 40 is provided at the upper part of the cabinet 10 and fixedly connected to the cabinet 10 and the door body 20 respectively. The second hinge assembly 50 is provided at the lower part of the cabinet 10 and fixedly connected to the cabinet 10 and the door body 20 respectively. The first hinge assembly 40 and the second hinge assembly 50 are provided along the same axis, so that the door body 20 can rotate around the axis, and the opening and closing of the door body 20 can be realized.

[0024] Generally, the hinge assembly 30 is located on the left or right side of the door body 20. Referring to FIGS. 1 and 2, the door body 20 includes a left side wall, a right side wall, an upper side wall, a lower side wall, and a front side wall. For the convenience of description, among the left side wall and the right side wall of the door body 20, the side wall closer to the hinge assembly 30 is called the door side wall 21.

[0025] For example, in FIGS. 1 and 2, when the hinge assembly 30 is provided at the left end (i.e., the right side of the user) of the door body 20, the left side wall of the door body 20 is called the door side wall 21, and the right end of the door body 20 rotates about the left end of the door body 20 as the rotation center.

[0026] Similarly, when the hinge assembly 30 is provided at the right end of the door body 20, the right side wall of the door body 20 is called the door side wall 21, and the left end of the door body 20 rotates about the right end of the door body 20 as the rotation center.

[0027] In some embodiments, when the door body 20 is closed, the door side wall 21 is flush with the side wall (i.e., the box side wall 12) of the box body 10 close to the hinge assembly 30. Note that the term "flush" includes complete flush and approximate flush.

[0028] In some embodiments, referring to FIGS. 1, 2, and 4, when the door body 20 is closed, the side wall (e.g., the front side wall) of the door body 20 away from the box body 10 is called the door front wall 22, and the side wall (e.g., the rear side wall) of the door body 20 close to the box body 10 when the door body 20 is closed is called the door rear wall 23. The door front wall 22 and the door side wall 21 intersect to form a first side edge W (i.e., a side edge), and the door side wall 21 and the door rear wall 23 intersect to form a second side edge N. When the door body 20 is closed, the first side edge W is located on the side of the second side edge N away from the box body 10.

[0029] In addition, when both the front door wall 22 and the side door wall 21 are flat surfaces, the intersection line of these two flat surfaces is theoretically the first side edge W. In actual processing and manufacturing, usually, the front door wall 22 and the side door wall 21 are rounded and transitioned at the intersection. In this way, a curved surface is formed at the intersection of the front door wall 22 and the side door wall 21, and any straight line extending along the height direction (i.e., the vertical direction) of the refrigerator 1 on the curved surface may represent the first side edge W.

[0030] The cabinet 10 includes a left side wall, a right side wall, an upper side wall, a lower side wall, and a rear side wall. In some embodiments, among the left side wall and the right side wall of the cabinet 10, the plane where the side wall close to the hinge assembly 30 is located is defined as the reference plane M0. Taking the reference plane M0 as the boundary plane, the side where the cabinet 10 is located is defined as the inner side, and the opposite side is defined as the outer side. In FIGS. 1 and 2, when the hinge assembly 30 is provided at the left end of the cabinet 10, the left side wall of the cabinet 10 is defined as the reference plane M0, and the inner side is the right side of the reference plane M0.

[0031] It is understood that when the hinge assembly 30 is provided at the right end of the cabinet 10, the right side wall of the cabinet 10 is defined as the reference plane M0, and the inner side is the left side of the reference plane.

[0032] Referring to FIG. 2, when the refrigerator 1 is fitted into the cabinet 100, considering factors such as the unevenness of the floor and the deformation of the cabinet, it is necessary to ensure a first gap 101 between the outer wall of the refrigerator 1 (corresponding to the location where the reference plane M0 is located) and the inner wall of the cabinet 100. The width of the first gap 101 is usually any value within the range of 3 mm to 5 mm. For example, the width of the first gap 101 may be 3 mm, 4 mm, or 5 mm.

[0033] For the door body 20 to open normally, during the rotation process of the door body 20, the distance that the first side edge W exceeds the reference plane M0 (that is, when the first side edge W moves outward from the reference plane M0 as the door body 20 rotates, the distance between the first side edge W and the reference plane M0) should not be excessive. For example, this distance should be 5 mm or less. Otherwise, it is understood that the first side edge W may collide with the cabinet 100, resulting in the door body 20 being unable to fully open and the door body 20 or the cabinet 100 being damaged.

[0034] Therefore, the hinge assembly 30 adopts the form of a biaxial hinge. When the door body 20 rotates, the first side edge W of the door body 20 moves inward, thus avoiding the first side edge W from colliding with the cabinet 100.

[0035] In some embodiments, referring to FIGS. 3 and 5, the first hinge assembly 40 includes a first hinge plate 410, a first biaxial assembly 420, a first track groove 433, and a second track groove 434. The first hinge plate 410 includes a first connection portion 411 and a first extension portion 412 connected to the first connection portion 411. The first connection portion 411 and the first extension portion 412 are formed in the same plane. The first biaxial assembly 420 includes a first shaft 421 and a second shaft 422.

[0036] The door body 20 includes a first end cap 210 provided at the upper end of the door body 20 and corresponding to the position of the first hinge assembly 40. The side surface of the first end cap 210 close to the first hinge plate 410 is recessed in a direction away from the first hinge plate 410, forming the first track groove 433 and the second track groove 434.

[0037] In some embodiments, the first end cap 210 is an injection-molded member integrally formed by injection molding. Alternatively, in some embodiments, the first end cap 210 may be integrally formed with the door body. In this case, the first end cap may be a part of the door body.

[0038] The first shaft 421 and the second shaft 422 of the first second-axis assembly 420 are both disposed on the first extending portion 412 and extend downward from the lower surface of the first extending portion. The first shaft 421 is inserted into the first locus groove 433 and engages with the first locus groove 431. The second shaft 422 is inserted into the second locus groove 434 and engages with the second locus groove 434.

[0039] When the door body 20 rotates, it is understood that the first shaft 421 moves relatively within the first locus groove 433 and the second shaft 422 moves relatively within the second locus groove 434.

[0040] The first connecting portion 411 is fixedly connected to the upper side wall of the box body 10. The first connecting portion 411 has a plurality of first through holes 4111, and the box body 10 has a plurality of second through holes 11. The plurality of second through holes 11 are located on the upper side wall of the box body 10 and correspond to the plurality of first through holes 4111 one by one. The first connecting portion 411 may be fixedly connected to the box body 10 by a fastening tool such as a screw.

[0041] In this way, the box body 10 and the door body 20 are connected by the first hinge assembly 40, and the door body 20 is rotatable relative to the box body 10 by the first hinge assembly 40.

[0042] In some embodiments, the diameter of the first shaft 421 is larger than the diameter of the second shaft 422. It is understood that the first shaft 421 is the main shaft and mainly plays a positioning role, and the second shaft 422 is the auxiliary shaft and mainly plays a guiding role. When the door body 20 rotates, the door body 20 applies a force to the first shaft 421 and the second shaft 422, and the force mainly concentrates on the main shaft. Therefore, when the diameter of the first shaft 421 is larger than the diameter of the second shaft 422, the strength of the first shaft 421 can be improved.

[0043] In some embodiments, the first connection portion 411 is integrally formed with the first extending portion 412, and the first hinge plate 410, the first shaft 421, and the second shaft 422 are integrally formed. Alternatively, the first hinge plate 410, the first shaft 421, and the second shaft 422 may all be independent members, and the first shaft 421 and the second shaft 421 may be fixedly connected to the first hinge plate 41 by welding or screw connection.

[0044] In some embodiments, referring to FIG. 6, the first hinge assembly 40 further includes a first mounting block 430 having a first plate body 431 and a first protrusion 432. The first plate body 431 extends downward to form the first protrusion 432, and the first protrusion opens upward to define a first track groove 433 and a second track groove 434.

[0045] For example, the first track groove 433 includes a groove bottom and a circumferential groove wall surrounding the edge of the groove bottom. The circumferential groove wall surrounds a groove opening facing the groove bottom. The structure of the second track groove 434 is similar to that of the first track groove 433, but different in the length and shape of the groove.

[0046] In some embodiments, as shown in FIG. 6, the first end cap 210 includes a first receiving groove 213, and the first receiving groove 213 opens upward. The first mounting block 430 is fitted into the first receiving groove 213. The first plate body 431 is parallel to the upper side wall of the door body 20. The first plate body 431 has a plurality of third through holes 4311, and the first end cap 210 has a plurality of fourth through holes 214, and the plurality of fourth through holes 214 correspond to the plurality of third through holes 431 one by one. The first plate body 431 and the first end cap 210 may be fixedly connected by a fastening tool such as a screw.

[0047] In some embodiments, the first plate 431 includes a first engaging groove. The first receiving groove 213 includes a first engaging portion. When the first mounting block 430 is fitted into the first receiving groove 213, the first engaging portion is mounted in the first engaging groove so that the relative position between the first mounting block 430 and the door body 20 is restricted.

[0048] In some embodiments, the first plate body 431 and the first protruding portion 432 are integrally formed, whereby the structural accuracy and strength of the first mounting block 430 can be enhanced.

[0049] For example, the first plate body 431 and the first protruding portion 432 may be integrally formed by injection molding.

[0050] In some embodiments, as shown in FIGS. 7A to 10B, the second hinge assembly 50 includes a second hinge plate 510, a second biaxial assembly 520, a third track groove 533, and a fourth track groove 534. The second hinge plate 510 includes a second connecting portion 511 and a second extending portion 512 connected to the second connecting portion 511. The second biaxial assembly 520 includes a third shaft 521 and a fourth shaft 522.

[0051] The door body 20 further includes a second end cap 220 provided at the lower end of the door body 20 and corresponding to the position of the second hinge assembly 50. The surface of the second end cap 220 close to the second hinge plate 510 is recessed in a direction away from the second extending portion 512, and the third track groove 533 and the fourth track groove 534 are formed.

[0052] In some embodiments, the second end cap 220 is an injection-molded member integrally formed by injection molding. Alternatively, in some embodiments, the second end cap 220 may be integrally formed with the door body, and in this case, the second end cap 220 may be a part of the door body.

[0053] The second connecting portion 511 is connected to the side of the lower end of the box body 10 close to the door body 20. The second extending portion 512 extends in a direction away from the box body 10 from the second connecting portion 511. The second connecting portion 511 has a plurality of fifth through holes 5111, and the box body 10 has a plurality of sixth through holes. The plurality of sixth through holes are located on the lower side wall of the box body 10 and correspond to the plurality of fifth through holes 5111 one by one. The second connecting portion 511 may be fixedly connected to the box body 10 by a fastening tool such as a screw.

[0054] The third axis 521 and the fourth axis 522 of the second shaft assembly 520 are both provided on the second extension portion 512 and extend upward from the upper surface of the second extension portion 512.

[0055] The third axis 521 is inserted into and fits with the third track groove 533. The fourth axis 522 is inserted into and fits with the fourth track groove 534. In this way, the box body 10 and the door body 20 are connected by the second hinge assembly 50, and the door body 20 is rotatable relative to the box body 10 by the second hinge assembly 50.

[0056] In some embodiments, the diameter of the third axis 521 is larger than the diameter of the fourth axis 522. It is understood that the third axis 521 is the main axis and mainly plays a positioning role, and the fourth axis 522 is the auxiliary axis and mainly plays a guiding role. When the door body 20 rotates, the door body 20 applies a force to the third axis 521 and the fourth axis 522, and the force mainly concentrates on the main axis. Therefore, when the diameter of the third axis 521 is larger than the diameter of the fourth axis 522, the strength of the third axis 522 can be improved.

[0057] In some embodiments, the second connection portion 511 is integrally formed with the second extension portion 512, and the second hinge plate 510, the third axis 521, and the fourth axis 522 are integrally formed. Alternatively, the second hinge plate 510, the third axis 521, and the fourth axis 522 may all be independent members, and the third axis 522 and the fourth axis 522 may be fixedly connected to the second hinge plate 510 by welding or screw connection.

[0058] In some embodiments, referring to FIGS. 11 and 12, the second hinge assembly 50 further includes a second mounting block 530 having a second plate body 531 and a second protrusion 532. The second plate body 531 extends upward to form the second protrusion 532, and the second protrusion 532 opens downward to define the third track groove 533 and the fourth track groove 534.

[0059] For example, the third trajectory groove 533 includes a groove bottom and a circumferential groove wall surrounding the edge of the groove bottom. The circumferential groove wall surrounds a groove opening facing the groove bottom. The structure of the fourth trajectory groove 534 is similar to that of the third trajectory groove 533, but different in the length and shape of the groove.

[0060] In some embodiments, as shown in FIG. 11, the second end cap 220 includes a second receiving groove 223 that opens downward. The second mounting block 530 is fitted into the second receiving groove 223. The second plate body 531 is parallel to the lower side wall of the door body 20. The second plate body 531 has a plurality of seventh through holes 5311, and the second end cap 220 has a plurality of eighth through holes 224. The plurality of eighth through holes 224 correspond to the plurality of seventh through holes 5311 one by one. The second plate body 531 and the second end cap 220 may be fixedly connected by a fastening tool such as a screw.

[0061] In some embodiments, the second plate body 531 includes a second engaging groove. The second receiving groove 223 includes a second engaging portion. When the second mounting block 530 is fitted into the second receiving groove 223, the second engaging portion is mounted in the second engaging groove so that the relative positions of the second mounting block 530 and the door body 20 are restricted.

[0062] In some embodiments, the second plate body 531 and the second protrusion 532 are integrally formed, thereby improving the structural accuracy and strength of the second mounting block 530.

[0063] For example, the second plate body 531 and the second protrusion 532 may be integrally formed by injection molding.

[0064] In some embodiments, the second hinge plate 510 further includes a first fitting portion, and the second mounting block 530 further includes a second fitting portion that fits with the first fitting portion. When the user closes the door body 20, the first fitting portion fits with the second fitting portion to limit the position of the door body 20. When the user opens the door body 20, the first fitting portion is disengaged from the fitting with the second fitting portion and rotates the door body 20 in a direction away from the box body 10.

[0065] For example, referring to FIGS. 11 and 12, the second engaging portion is configured as a lock hook 540. The lock hook 540 is provided on one side (for example, the left side or the right side) of the second plate body 531. The lock hook 540 has a fixed end fixedly connected to the second plate body 531, a free end extending in a direction away from the second plate body 531, and is bent in a direction approaching the second plate body 531, thereby forming an opening 541 facing the second plate body 531. The free end of the lock hook 540 is closer to the box body 10 than the fixed end of the lock hook 540.

[0066] Referring to FIGS. 7A and 7B, the first fitting portion is configured as a stopper portion 513. The stopper portion 513 is provided on one side (for example, the left side or the right side) of the second extending portion 512, and the stopper portion 513 extends in a direction away from the second extending portion 512 from the one side of the second extending portion 512. A second gap 514 is defined and formed between the stopper portion 513 and the second connecting portion 511.

[0067] Note that the position of the stopper portion 513 corresponds to the position of the opening 541. That is, when the lock hook 540 is provided on the left side of the second plate body 531, the stopper portion 513 is provided on the left side of the second extending portion 512. On the other hand, when the lock hook 540 is provided on the right side of the second plate body 531, the stopper portion 513 is provided on the right side of the second extending portion 512.

[0068] In this way, referring to FIGS. 7A and 7B, when the door body 20 is in the closed state, the stopper portion 513 is located within the opening 541, and the free end of the lock hook 540 is located within the second gap 514 and abuts against the side of the stopper portion 513 closer to the box body 10, thereby improving the adhesion between the door body 20 and the box body 10 and preventing the influence of the poor closing of the door body 20 on the refrigeration and freezing effects of the refrigerator.

[0069] Referring to FIGS. 8A and 10B, during the process of opening the door body 20, when the lock hook 540 is deformed by receiving a force, it overcomes the stopper of the stopper portion 513 and disengages the lock hook 540 from the engagement with the stopper portion 513.

[0070] In some embodiments, as shown in FIGS. 11 and 12, the lock hook 540 includes a third extending portion 542 and a bending portion 543. The third extending portion 542 is connected to one side (e.g., the left side or the right side) of the second plate body 531, and the third extending portion 542 is integrally formed with the second plate body 531. One end of the bending portion 543 is fixedly connected to one end of the third extending portion 542 away from the second plate body 531, and the other end of the bending portion 543 extends in a direction away from the second plate body 531 and bends in a direction approaching the second plate body 531.

[0071] The third extending portion 542 has a ninth through hole 5421, and the second end cap 220 has a tenth through hole 225 at a position corresponding to the ninth through hole 5421. The third extending portion 542 can be fixedly connected to the second end cap 220 by a fastening member such as a screw, whereby the connection strength between the third extending portion 542 and the second end cap 220 can be increased, and only the bending portion 543 deforms when the lock hook 540 detaches from the stopper portion 513.

[0072] In some embodiments, as shown in FIGS. 11 and 12, the free ends of the bending portion 543 and the stopper portion 513 are both arc-shaped, whereby the smoothness of the engagement or detachment of the bending portion 543 with respect to the fitting of the stopper portion 513 can be improved.

[0073] In some embodiments, when the door body 20 is closed from the open state to a preset closing angle, the door body 20 automatically closes under the action of the bending portion 543 and the stopper portion 513. For example, this preset closing angle is less than 7°.

[0074] In some embodiments, as shown in FIGS. 11 and 12, the second end cap 220 further includes a first protrusion 226 and a second protrusion 227. A gap groove 228 is formed between the first protrusion 226 and the second protrusion 227. The first protrusion 226 is closer to the door front wall 22 and the door side wall 21 than the second protrusion 227. The third extension 542 further includes an insertion plate 5422. The insertion plate 5422 is located at an end close to the bending portion 543 of the third extension 542, and the shape of the insertion plate 542 matches the shape of the gap groove 228. When the second mounting block 530 is inserted into the second receiving groove 223, the insertion plate 5422 can be inserted into the gap groove 228 to limit the position of the third extension 542, and the third extension 542 can prevent deformation of the door body 20 in the thickness direction.

[0075] For example, referring to FIG. 11, the gap groove 228 is an arc-shaped groove. Therefore, the insertion plate 5422 is an arc plate that fits with the gap groove 228, and the contact area between the gap groove 228 and the third extension 542 can be increased, thereby enhancing the connection strength between the second mounting block 530 and the second end cap 220.

[0076] In some embodiments, as shown in FIG. 11, a tenth through hole 225 is formed in the first protrusion 226.

[0077] Note that the lock hook 540 may be provided on at least one of the first mounting block 430 and the second mounting block 530, and the stopper portion 513 may be provided on at least one of the first hinge plate 410 and the second hinge plate 510 corresponding to the lock hook 540.

[0078] It is understood that when the structure of any mounting block (including at least one of the first mounting block 430 and the second mounting block 530) changes, the shape of the corresponding receiving groove (including at least one of the first receiving groove 213 and the second receiving groove 223) also changes to accommodate the mounting block.

[0079] The mounting block is made of polyformaldehyde (POM). POM has strong frictional resistance and can extend the service life of the mounting block.

[0080] In some embodiments, referring to FIGS. 11 and 12, the second end cover 220 further includes a position limiting portion 229. The position limiting portion 229 is provided inside the second end cover 220 and protrudes downward along the lower surface of the second end cover 220. The position limiting portion 229 extends along the width direction of the door body 20. The position limiting portion 229 is located at the tip of the second mounting block 530. For example, the position limiting portion 229 is a sheet metal member.

[0081] Referring to FIGS. 7A and 7B, the second hinge plate 510 further includes a position limiting groove 515. When the door body 20 is in the closed state, the position limiting groove 515 is located on the side close to the door side wall 21 and the door front wall 22 of the second extension portion 512, and penetrates the second extension portion 512 along the thickness direction of the second extension portion 512.

[0082] Referring to FIGS. 10A and 10B, when the door body 20 rotates to the maximum angle (i.e., the ninth angle), the position limiting portion 229 abuts against the position limiting groove 515 to prevent the door body 20 from continuing to rotate, and prevent the fourth shaft 522 from rubbing against the end portion of the fourth track groove 534 close to the door side wall 21, which is advantageous for improving the durability of the fourth shaft 522.

[0083] In some embodiments, as shown in FIG. 11, the position limiting portion 229 includes an insertion portion 2291 and a position limiting bar 2292.

[0084] The insertion portion 2291 is plate-shaped and is inserted between the second mounting block 530 and the groove wall of the second receiving groove 223. That is, when the second mounting block 530 is fitted into the second receiving groove 223, the side of the second plate body 531 close to the door front wall abuts against the insertion portion 2291, and the insertion portion 2291 is fixed to the second receiving groove 223.

[0085] The position limiting bar 2292 is connected to the insertion part 2291 and is located below the insertion part 2292. The position limiting bar 2292 extends along the width direction of the door body 20. When the door body 20 rotates to the maximum angle, the position limiting bar 2292 abuts against the position limiting groove 515, preventing the door body 20 from continuing to rotate.

[0086] In some embodiments, the position limiting bar 2292 is integrally formed with the insertion part 2291.

[0087] It is understood that the position limiting part 229 is fixedly attached to the second receiving groove 223 by being sandwiched between the second mounting block 530 and the inner wall of the second receiving groove 223, which can simplify the connection structure between the position limiting part 229 and the second end cap 220.

[0088] In some embodiments, the limiting part 229 may be provided on the first end cap 210, but will not be described in detail here.

[0089] In some embodiments, there is a clearance fit between the first shaft 421 and the first track groove 433, and there is a clearance fit between the second shaft 422 and the second track groove 434, thereby allowing deformation due to manufacturing errors. There is an interference fit between the third shaft 521 and the third track groove 533, and there is an interference fit between the fourth shaft 522 and the fourth track groove 534, preventing abnormal noise from occurring when the lock hook 540 disengages from the engagement with the stopper part 513 and realizing the silent opening of the door body 20. When the door body 20 is in the open state, in order for the first side edge W to move from the outside beyond the reference plane M0 to a distance of 5 mm or less, it is understood that it is necessary to move the first side edge W to the inside of the reference plane M0 during the rotation of the door body. Thus, the refrigerator 1 needs to be used by being fitted into the cabinet 100.

[0090] Hereinafter, mainly taking the first hinge assembly 40 provided on the upper part of the cabinet body 10 as an example, the process of opening and closing the door body 20 with respect to the cabinet body 10 will be described. It is understood that the operating principle of the second hinge assembly 50 is the same as that of the first hinge assembly 40 and will not be described in detail here.

[0091] After the first hinge plate 410 is fixedly connected to the box body 10 and the first shaft 421 and the second shaft 422 are fixedly connected to the first hinge plate 41, during the process that the door body 20 rotates relative to the box body 10, the box body 10 maintains static. Therefore, the first hinge plate 401, the first shaft 421, and the second shaft 421 also maintain static. In this case, the first track groove 433 moves relative to the first shaft 421, and the second track groove 434 moves relative to the second shaft 422.

[0092] It is understood that there is a relative motion relationship between the first track groove 433 and the first shaft 421, and between the second track groove 434 and the second shaft 422. For the sake of easy explanation, in some embodiments of the present disclosure, the first track groove 433 and the second track groove 434 are used as static reference objects, and the way that the first shaft 421 moves within the first track groove 431 and the second shaft 422 moves within the second track groove 434 will be described. However, it is understood that this does not limit the present disclosure.

[0093] As shown in FIG. 4, the first track groove 433 includes a straight groove segment and a curved groove segment communicating with the straight groove segment. The straight groove segment is farther away from the door side wall 21 than the curved groove segment.

[0094] In some embodiments, one end of the straight groove segment is farther away from the door side wall 21 than the other end of the straight groove segment, that is, the straight groove segment is parallel to the door front wall 22. One end of the curved groove segment communicates with the other end of the straight groove segment, and the other end of the curved groove segment extends in a direction approaching the door side wall 21 and the door front wall 22. The curved groove segment protrudes in a direction approaching the door side wall 21 and the door rear wall 23. In this case, the second side edge N is located on the convex side of the curved groove segment.

[0095] The central locus line of the first locus groove 433 is called the first locus line S. It is understood that the first locus line S is defined by the shape of the first locus groove 434. Corresponding to the straight groove segment and the curved groove segment, the first locus line S includes a straight locus segment and a curved locus segment connected to the straight locus segment.

[0096] One end of the straight locus segment is farther from the door side wall 21 than the other end of the straight locus segment, one end of the curved locus segment is connected to the other end of the straight locus segment, and the other end of the curved locus segment extends in a direction approaching the door side wall and the door front wall 22. The second side edge N is located on the convex side of the curved locus segment.

[0097] In some embodiments, the connection point between the straight locus segment and the curved locus segment is called the second positioning point P2 (see FIG. 15B), and the straight locus segment is tangent to the curved locus segment at point P2. During the process of the door body 20 opening, the first shaft 421 moves from the one end of the straight locus segment along the straight locus segment to the second positioning point P2 in the first locus groove 433, and then moves in a curvilinear motion along the curved locus segment.

[0098] As shown in FIG. 4, the second locus groove 434 is a substantially elliptical arc groove. One end of the second locus groove 434 is farther from the door side wall 21 than the other end of the second locus groove 434 and is close to the door front wall 22. In some embodiments, the second locus groove 434 protrudes in a direction away from the door side wall 21 and the door front wall 22. In this case, the first side edge W is located on the concave side of the second locus groove 434.

[0099] The central locus line of the second locus groove 434 is called the second locus line K. It is understood that the second locus line K is in the shape of a substantially elliptical arc, limited by the shape of the second locus groove 434. One end of the second locus line K is farther from the door side wall 21 and closer to the door front wall 22 than the other end of the second locus line, and the first side edge W is located on the concave side of the second locus line K. The first locus groove 433 is located on the concave side of the second locus groove 434.

[0100] During the process of the door body 20 opening, the first shaft 421 moves relatively linearly in the linear groove segment, and the second shaft 422 moves relatively curvilinearly in the second trajectory groove 434, so that the door body 20 can move a certain distance inside the reference plane M0 while rotating. It can be understood that in this way, it is possible to prevent the door body 20 from colliding with the box body 100 when the door body 20 opens.

[0101] The approximate elliptical arc groove is a groove having a center locus line of an approximate elliptical arc (for example, the second locus line K). The approximate elliptical arc includes a standard elliptical arc (that is, a part of a standard ellipse) and a non-standard elliptical arc that is different from the standard elliptical arc due to machining, assembly error, or slight deformation but still has elliptical arc trajectory characteristics.

[0102] In some embodiments, referring to FIG. 4, both the first shaft 421 and the second shaft 422 are cylindrical. The orthographic projection of the central axis of the first shaft 421 in the first trajectory groove 433 is called the positioning center point P, and the orthographic projection of the central axis of the second shaft 422 in the second trajectory groove 434 is called the guide center point Q.

[0103] During the process of the door body 20 opening, the door body 20 rotates around the variable point (X, Y), and the trajectory of this variable point is represented by the following formula 1.

[0104] (Formula 1) JPEG0007700371000001.jpg7170However, X represents the distance between the variable point and the door side wall 21, and Y represents the distance between the variable point and the door front wall 22. X1 represents the distance between the positioning center point P and the door side wall 21, and Y1 represents the distance between the positioning center point P and the door front wall 22. X2 represents the distance between the center point Q and the door side wall 21, and Y2 represents the distance between the guide center point Q and the door front wall 22.

[0105] When the second trajectory groove 434 is an elliptical groove, the second trajectory line K is an elliptical arc. Based on the parameter equation of a regular ellipse (x = fcos t, y = gsin t), the parameter equation of an oblique ellipse (represented by the following formula 2) is derived.

[0106] (Formula 2) JPEG0007700371000002.jpg9170However, c is the distance between the center O of the ellipse and the door side wall 21, d is the distance between the center O of the ellipse and the door front wall 22. θ is the inclination angle of the ellipse, t is a parameter, f is the major semi-axis of the ellipse, and g is the minor semi-axis of the ellipse.

[0107] As shown in FIG. 13A, when the door body 20 is in the closed state, let the distance between the positioning center point P and the door side wall 21 be a, the distance between the positioning center point P and the door front wall 22 be b, the distance between the positioning center point P and the guide center point Q be L, and the angle between the connecting line (axial center line segment PQ) between the positioning center point P and the guide center point Q and the plane where the door front wall 22 is located be n.

[0108] As shown in FIG. 13B, when the rotation angle of the door body 20 is m (0 ≤ m ≤ n), the first axis 421 moves a distance k in the direction approaching the door side wall 21. Point Q' is the end point of the second locus line K. Let the distance between point Q and point Q' be V, and the equation of the straight line QQ' determined by the guide center point Q and point Q' is represented by the following formula 3.

[0109] (Formula 3) JPEG0007700371000003.jpg8170However, h is the slope of the straight line QQ'.

[0110] In this case, X Q can be obtained by the following formula 4.

[0111] (Formula 4) JPEG0007700371000004.jpg13170However, X Q represents the distance between the guide center point Q and the door side wall 21, and X Q’ represents the distance between the end point Q' of the second locus line K and the door side wall 21.

[0112] In this case the distance between the positioning center point P and the door side wall 21 is shown by the following formula 5.

[0113] (Formula 5) JPEG0007700371000005.jpg7170

[0114] The distance between the positioning center point P and the front door wall 22 is shown in the following formula 6.

[0115] (Formula 6) JPEG0007700371000006.jpg8170

[0116] The distance between the guide center point Q and the side door wall 21 is shown in the following formula 7.

[0117] (Formula 7) JPEG0007700371000007.jpg7170

[0118] The distance between the guide center point Q and the front door wall 22 is shown in the following formula 8.

[0119] (Formula 8) JPEG0007700371000008.jpg8170

[0120] (2) As shown in FIG. 13C, when the rotation angle of the door body 20 is m and n ≤ m ≤ (n + 90°), The distance between the positioning center point P and the side door wall 21 is shown in the following formula 9.

[0121] (Formula 9) JPEG0007700371000009.jpg7170

[0122] The distance between the positioning center point P and the front door wall 22 is shown in the following formula 10.

[0123] (Formula 10) JPEG0007700371000010.jpg7170

[0124] The distance between the guide center point Q and the side door wall 21 is shown in the following formula 11.

[0125] (Formula 11) JPEG0007700371000011.jpg6170

[0126] The distance between the guide center point Q and the front door wall 22 is shown in the following Equation 12.

[0127] (Equation 12) JPEG0007700371000012.jpg9170

[0128] (3) As shown in FIG. 13D, when the rotation angle of the door body 20 is m and m ≥ (n + 90°), The distance between the positioning center point P and the door side wall 21 is shown in the following Equation 13.

[0129] (Equation 13) JPEG0007700371000013.jpg7170

[0130] The distance between the positioning center point P and the front door wall 22 is shown in the following Equation 14.

[0131] (Equation 14) JPEG0007700371000014.jpg8170

[0132] The distance between the guide center point Q and the door side wall 21 is shown in the following Equation 15.

[0133] (Equation 15) JPEG0007700371000015.jpg7170

[0134] The distance between the guide center point Q and the front door wall 22 is shown in the following Equation 16.

[0135] (Equation 16) JPEG0007700371000016.jpg12170

[0136] (2) and (3) are combined. When the rotation angle of the door body 20 is m (n ≤ m) and n ≤ m, The distance between the positioning center point P and the door side wall 21 is shown in the following Equation 17.

[0137] (Formula 17) JPEG0007700371000017.jpg6170

[0138] The distance between the positioning center point P and the front door wall 22 is shown in the following formula 18.

[0139] (Formula 18) JPEG0007700371000018.jpg9170

[0140] The distance between the guide center point Q and the side door wall 21 is shown in the following formula 20.

[0141] (Formula 19) JPEG0007700371000019.jpg7170

[0142] The distance between the guide center point Q and the front door wall 22 is shown in the following formula 21.

[0143] (Formula 20) JPEG0007700371000020.jpg11170

[0144] Through the above calculations, the locus of the variable point (X = (X1 + X2) / 2, Y = (Y1 + Y2) / 2) around which the door body 20 rotates can be obtained.

[0145] Figures 14A to 14J show the structural diagrams of the first hinge assembly 40 when the door body 20 is opened to different angles. It is understood that the movement of the first shaft 421 along the first track groove 433 corresponds to the movement of the positioning center point P along the first track line S, and the movement of the second shaft 422 along the second track groove 434 corresponds to the movement of the guide center point Q along the second track line K.

[0146] In some embodiments, as shown in FIG. 14A, the first trajectory line S includes an initial positioning point P0 and a seventh positioning point P7 that is closer to the door side wall 21 and the door front wall 22 than the initial positioning point P0. During the process of opening the door body 20, the first trajectory line S extends from the initial positioning point P0 in a direction approaching the door side wall 21, and then extends to the seventh positioning point P7 with a certain curvature in a direction approaching the door side wall 21 and the door front wall 22. The seventh positioning point P7 is the other end of the first trajectory line S.

[0147] The second trajectory line K includes an initial guide point Q0 and a ninth guide point Q9 that is closer to the door side wall 21 than the initial guide point Q0 and extends in a direction away from the door front wall 22. The second trajectory line K extends from the initial guide point Q0 to the ninth guide point Q9 in a direction approaching the door side wall 21 and away from the door front wall 22, and the second trajectory line K is substantially elliptical. The first trajectory line S is closer to the door front wall 22 and the door side wall 21 than the second trajectory line K, that is, the first trajectory line S is located on the concave side of the second trajectory line.

[0148] In this way, the second trajectory groove 434 can effectively limit the movement of the second shaft 422. In accordance with the movement of the first shaft 421 in the first trajectory groove 433, during the process of opening the door body 20, the movement of the first shaft 421 is driven by the second shaft 422, and the door body 20 is rotated and moved a certain distance inward, thereby ensuring the stability of the door body 20 when it is opened.

[0149] Hereinafter, taking the case where the maximum opening angle G9 of the door body is greater than 90° (that is, the ninth angle is greater than 90°) as an example, during the process of the door body 20 opening from the closed state to the maximum angle G9, when the door body 20 is opened to different angles, the position of the first shaft 421 with respect to the first trajectory groove 433 and the position of the second shaft 422 with respect to the second trajectory groove 434 will be described in detail.

[0150] Also, a plane passing through the center of mass of the door body 20 and parallel to the door front wall 22 is called the center of mass plane F. During the process of opening the door body 20, the center of mass plane F moves together with the door body 20.

[0151] As shown in FIG. 14A, when the opening angle of the door body 20 is 0°, the door body 20 is in a closed state, the positioning center point P is located at the initial positioning point P0 of the first trajectory line S, and the guide center point Q is located at the initial guide point Q0 of the second trajectory line K. In this case, the guide center point Q and the positioning center point P are located on the same side of the mass center plane F, and the guide center point Q is farther from the mass center plane F than the positioning center point P.

[0152] As shown in FIG. 14B, in the process of the door body 20 opening from an arbitrary angle larger than the closed state to an arbitrary angle smaller than G2, the first shaft 421 moves in a direction approaching the door side wall 21 along the linear trajectory segment of the first trajectory line S, and the second shaft 422 moves along the second trajectory line K in a direction approaching the door side wall 21 and away from the door front wall 22. In this case, the guide center point Q and the positioning center point P are located on the same side of the mass center plane F, and the guide center point Q is farther from the mass center plane F than the positioning center point P.

[0153] It should be noted that in the process of the door body 20 opening from an arbitrary angle larger than the closed state to an arbitrary angle smaller than G2, the movement tendencies of the guide center point Q and the positioning center point P do not change. When the door body 20 opens to different angles (this angle is between 0° and G2), the positions of the linear trajectory segments of the first shaft 421 with respect to the first trajectory line S are different, and the positions of the second shaft 422 with respect to the second trajectory line K are different.

[0154] In this way, when the opening angle of the door body 20 is larger than 0° and less than G2, in order to represent the relative positions of the first shaft 421 and the first trajectory groove 433 and the relative positions of the second shaft 422 and the second trajectory groove 434 when the door body 20 opens to the corresponding range, an arbitrary opening angle larger than 0° and less than G2 is selected.

[0155] For example, as shown in FIGS. 14B and 15A, in order to compare with the door body 20 opening to other angles, the opening angle of the door body 20 being G1 (for example, G1 is larger than 0° and less than G2) represents a position within the opening angle range.

[0156] When the door body 20 opens to G1, the positioning center point P is located at the first positioning point P1 of the first locus line S, and the first positioning point P1 is closer to the door side wall 21 than the initial positioning point P0. The guide center point Q is located at the first guide point Q1 of the second locus line K, and the first guide point Q1 is closer to the door side wall 21 than the initial guide point Q0 and is away from the door front wall 22.

[0157] As shown in FIGS. 14C and 15B, when the opening angle of the door body 20 is G2, the door body 20 rotates to open to G2. The positioning center point P is located at the second positioning point P2 on the straight locus segment of the first locus line S, and the second positioning point P2 is closer to the door side wall 21 than the first positioning point P1. The second positioning point P2 is the end point of the straight locus segment close to the door side wall 21. The guide center point Q is located at the second guide point Q2 of the second locus line K, and the second guide point Q2 is closer to the door side wall 21 than the first guide point Q1 and is away from the door front wall 22.

[0158] During the process of the door body 20 opening from the closed state to G2, it is understood that the first shaft 421 always moves along the straight groove segment in the direction approaching the door side wall 21, and the second shaft 422 moves along the second locus groove 434 in the direction approaching the door side wall 21 and away from the door front wall 22.

[0159] In some embodiments, G2 may be set to any value within the range of 13° to 17°. For example, G2 may be 13°, 14°, 15° or 17°.

[0160] Also, when the opening angle of the door body 20 is G2, the guide center point Q and the positioning center point P are located on the same side of the mass center plane F, and the guide center point Q is closer to the mass center plane F than the positioning center point P.

[0161] In some embodiments, when the door body 20 opens to a preset unlocking angle, the first fitting portion is released from the lock with the second fitting portion.

[0162] For example, referring to FIGS. 8A and 8B, when the door body 20 is opened to the unlocking angle, the lock hook 540 disengages from the engagement with the stopper portion 513.

[0163] In some embodiments, when the unlocking angle is set as G1, when the door body 20 is opened to G1, the lock hook 540 disengages from the engagement with the stopper portion 513.

[0164] In some embodiments, when the unlocking angle is set as G2, when the door body 20 is opened to G2, the lock hook 540 disengages from the engagement with the stopper portion 513.

[0165] In some embodiments, in the process of the door body 20 opening from the closed state to G2, when the door body 20 rotates by a unit angle, the distance it moves inward is small. Therefore, it is understood that it is advantageous for realizing a rapid separation between the lock hook 540 and the stopper portion 513 and improving the smoothness of the opening of the door body 20.

[0166] As shown in FIGS. 14D to 14G, in the process of the door body 20 opening from an arbitrary angle greater than G2 to an arbitrary angle less than G7, the first shaft 421 moves along the curved trajectory segment of the first trajectory line S in a direction approaching the door side wall 21 and the door front wall 22, and the second shaft 422 moves along the second trajectory line K in a direction approaching the door side wall 21 and away from the door front wall 22.

[0167] It should be noted that in the process of the door body 20 opening from an arbitrary angle greater than G2 to an arbitrary angle less than G7, the movement tendencies of the guide center point Q and the positioning center point P do not change. When the door body 20 is opened to different angles (the angle is between G2 and G7), the positions of the straight trajectory segments of the first shaft 421 with respect to the first trajectory line S are different, and the positions of the second shaft 422 with respect to the second trajectory line K are different.

[0168] In this way, when the opening angle of the door body 20 is greater than G2 and less than G7, in order to represent the relative positions of the first shaft 421 and the second track groove 434 and the relative positions of the second shaft 422 and the first track groove 433 when the door body 20 is opened within the corresponding range, any opening angle greater than G2 and less than G7 is selected.

[0169] For example, as shown in FIGS. 14D to 14G, G3, G4, G5, and G6 represent positions within the opening angle range for comparison with the case where the door body 20 is opened to other states. Here, G2 < G3 < G4 < G5 < G6 < G7.

[0170] Referring to FIGS. 14D to 14G and FIGS. 15C to 15F, in the process of the door body 20 being sequentially opened from an arbitrary angle greater than G2 and less than G3 to G3, G4, G5, and G6, the positioning center point P moves sequentially along the first track line S in a direction approaching the door side wall 21 and the door front wall 22 to the positioning point P3, the fourth positioning point P4, the fifth positioning point P5, and the sixth positioning point P6. Correspondingly, the guide center point Q moves sequentially along the second track line K in a direction approaching the door side wall 21 and away from the door front wall 22 to the third guide point Q3, the fourth guide point Q4, the fifth guide point Q5, and the sixth guide point Q6.

[0171] In some embodiments, G3 is any value within the range of 22° to 30°. For example, the third angle G3 is 22°, 25°, 28°, or 30°.

[0172] In some embodiments, as shown in FIGS. 14E and 15D, when the door body 20 is opened to G4, the mass center plane F of the door body 20 moves between the positioning center point P and the guide center point Q. G4 is any value within the range of 43° to 47°. For example, G4 is 43°, 45°, or 47°.

[0173] In some embodiments, as shown in FIGS. 14F and 15E, when the door body 20 is opened to G5, the distance by which the first side edge W exceeds the reference plane M0 reaches a maximum value. In this case, the distance between the first side edge W and the reference plane M0 is smaller than the width of the first gap 101, thereby effectively preventing the door body 20 from colliding with the cabinet 100 during the opening process.

[0174] In some embodiments, G5 is any value within the range of 46° to 50°. For example, G5 is 46°, 48°, or 50°, that is, when the door body 20 is opened to about 48°, the distance by which the first side edge W exceeds the reference plane M0 reaches a maximum value.

[0175] As shown in FIGS. 14G and 15F, when the door body 20 is opened to G6, the guide center point Q moves to the midpoint Q6 of the second locus line K. In this case, the straight line Q0-Q9 (the straight line on which the two end points of the second locus line K are located) where the initial guide point Q0 and the ninth guide point Q9 are located is substantially parallel to the reference plane M0. That is, the perpendicular bisector L0 of the line segment Q0Q9 is substantially perpendicular to the reference plane M0.

[0176] It should be noted that "substantially perpendicular" is defined as the included angle between the perpendicular bisector L0 and the reference plane M0 being any value within the range of 88° to 92°.

[0177] With the above settings, the extending direction of the second locus groove 434 is limited, thereby making the synchronous movement of the first axis 421 with respect to the first locus groove 433 and the synchronous movement of the second axis 422 with respect to the second locus groove 434 smoother during the opening process of the door body 20, which is beneficial to improving the smoothness and stability of the opening of the door body 20.

[0178] In some embodiments, when the door body 20 is in the closed state, the included angle between the straight line on which the major axis of the ellipse where the second locus line K is located and the reference plane M0 is G6, which is beneficial to improving the smoothness of opening the door body 20.

[0179] In some embodiments, the straight line on which the line segment Q0Q9 is located is parallel to the major axis of the ellipse on which the second locus line K is located, which can make the curvature change of the second locus line gentler and improve the smoothness of the movement along the second locus groove 434 of the second axis 422.

[0180] In some embodiments, G6 is equal to or close to G9 / 2. For example, G6 ∈ [G9 / 2 - 6°, G9 / 2]. Also, when the door body 20 is opened to G6, the guide center point Q moves to the midpoint of the second locus line K. Thereby, in the process of opening the door body 20, the movement locus with respect to the second locus groove 434 of the second axis 422 is more stable, which is advantageous for improving the smoothness of the opening of the door body 20.

[0181] In some embodiments, G9 is an arbitrary value within the range of 112° to 120°. For example, G9 is 112°, 115°, 118° or 120°. G6 is an arbitrary value within the range of 50° to 60°. For example, G6 is 50°, 53°, 56° or 60°.

[0182] It should be noted that when the door body 20 is opened to G6, the mass center plane F of the door body 20 is located between the positioning center point P and the guide center point Q.

[0183] As shown in FIGS. 14H and 15G, when the door body 20 is opened to G7, the positioning center point P is located at the seventh positioning point P7 on the first locus line S, and the guide center point Q is located at the seventh guide point Q7 on the second locus line K. The seventh positioning point P7 is closer to the door side wall 21 and the door front wall 22 than the sixth positioning point P6, and the seventh guide point Q7 is closer to the door side wall 21 and farther from the door front wall 22 than the sixth guide point Q6. In this case, the positioning center point P moves to the other end of the curved locus segment of the first locus line S. The mass center plane F of the door body 20 is located between the positioning center point P and the guide center point Q.

[0184] In some embodiments, G7 may be set to an arbitrary value within the range of 63° to 67°. For example, G7 may be 63°, 64°, 65° or 67°.

[0185] In some embodiments, as shown in FIGS. 14I, 14J, 15H, and 15I, during the process in which the door body 20 opens from any value greater than G7 to G9 (about 116°), the first axis 421 moves in a direction approaching the door side wall 21 and the door front wall 22 along the curved trajectory segment of the first trajectory line S, and the second axis 422 moves in a direction approaching the door side wall 21 and away from the door front wall along the second trajectory line K.

[0186] It should be noted that during the process in which the door body 20 opens from any value greater than G7 to G9, the tendency of the guide center point Q coincides with the tendency of the positioning center point P. When the door body 20 is opened to different angles (the angle is between G7 and G9), only the positions of the first axis 421 with respect to the curved trajectory segment of the first trajectory line S and the position of the second axis 422 with respect to the second trajectory line K are different.

[0187] Thus, when the opening angle of the door body 20 is greater than G7 and less than or equal to G9, in order to represent the relative positions of the first axis 421 and the first trajectory groove 433 and the relative positions of the second axis 422 and the second trajectory groove 434 when the door body 20 is opened within this range, any opening angle greater than G7 and less than or equal to G9 is selected.

[0188] For example, as shown in FIGS. 14I and 14J, G8 and G9 represent positions within the opening angle range for comparison with the case where the door body 20 is opened to other states. Here, G7 < G8 = 90° < G9.

[0189] As shown in FIGS. 14I and 15H, when the door body is opened to G8, the positioning center point P is located at the eighth positioning point P8 on the first trajectory line S, and the guide center point Q is located at the second guide point Q8 on the second trajectory line K. The eighth positioning point P8 is farther from the door side wall 21 and the door front wall 22 than the seventh positioning point P7, and the eighth guide point Q8 is closer to the door side wall 22 and farther from the door front wall 22 than the seventh guide point Q7. In this case, the center of mass plane F is located between the positioning center point P and the guide center point Q.

[0190] As shown in FIGS. 14J and 15I, when the door body is opened to G9, the positioning center point P is located at the ninth positioning point P9 on the first locus line S, and the guide center point Q is located at the ninth guide point Q9 on the second locus line K. The ninth positioning point P9 is farther from the door side wall 21 and the door front wall 22 than the eighth positioning point P8, and the ninth guide point Q9 is closer to the door side wall 22 and farther from the door front wall 22 than the eighth guide point Q8. In this case, the center of mass plane F is located between the positioning center point P and the guide center point Q.

[0191] In some embodiments, G1, G2, G3, G4, G5, G6, G7, G8, G9 are successively referred to as the first angle G1, the second angle G2, the third angle G3, the fourth angle G4, the fifth angle G5, the sixth angle G6, the seventh angle G7, the eighth angle G8, and the maximum angle G9.

[0192] The initial positioning point P0, the first positioning point P1, and the second positioning point P2 are distributed along the straight locus segment in a direction approaching the door side wall 21, and the third positioning point P3, the fourth positioning point P4, the fifth positioning point P5, the sixth positioning point P6, and the seventh positioning point P7 are distributed along the curved locus segment in a direction approaching the door side wall 21 and the door front wall 22. The seventh positioning point P7, the eighth positioning point P8, and the ninth positioning point P9 are distributed along the curved locus segment in a direction away from the door side wall 21 and the door front wall 22.

[0193] It should be noted that in the present disclosure, the relative positions of the ninth positioning point P9 and the eighth positioning point P8 and the third positioning point P3, the fourth positioning point P4, the fifth positioning point P5, and the sixth positioning point P6 are not limited. In some embodiments, the eighth positioning point P8 is located between the sixth positioning point P6 and the seventh positioning point P7, and the ninth positioning point P9 is close to the third positioning point P3.

[0194] The initial guide point Q0, the first guide point Q1, the second guide point Q2, the third guide point Q3, the fourth guide point Q4, the fifth guide point Q5, the sixth guide point Q6, the seventh guide point Q7, the eighth guide point Q8 and the ninth guide point Q9 are sequentially distributed along the first locus line S in the direction approaching the door side wall 21 and the direction away from the door front wall 22.

[0195] As described above, in the process of the door body 20 opening to any angle smaller than the second angle G2, the first shaft 421 moves in the direction approaching the door side wall 21 along the straight groove segment of the first locus groove 433.

[0196] In the process of the door body 20 continuing to open to the second angle G2, the first shaft 421 moves along the first locus groove 433 in the direction approaching the door side wall 21 to the other end (the second positioning point P2) of the straight groove segment.

[0197] In the process of the door body 20 continuing to open to any angle smaller than the sixth angle G6, the first shaft 421 moves in the direction approaching the door side wall 21 and the door front wall 22 along the curved groove segment of the first locus groove 433.

[0198] In the process of the door body 20 continuing to open to the sixth angle G6, the first shaft 421 moves along the first locus groove 433 in the direction approaching the door side wall 21 and the door front wall 22 to the other end (the seventh positioning point P7) of the curved groove segment.

[0199] In the process of the door body 20 continuing to open to any angle larger than the seventh angle G7, the first shaft 421 moves in the direction away from the door side wall 21 and the door front wall 22 along the curved groove segment of the first locus groove 433.

[0200] In the whole opening process of the door body 20 (the process of opening the door body 20 from 0° to the maximum angle G9), the second shaft 422 always moves along the second locus groove 434 in the direction approaching the door side wall 21 and away from the door front wall 22.

[0201] In some embodiments, the first axis 421 and the second axis 422 are fixed to the first hinge plate 410 and are stationary with respect to the first hinge plate 410. The first track groove 433 and the second track groove 434 are provided on the door body 20 and are stationary with respect to the door body. Therefore, the movement of the track groove (including the first track groove 433 and the second track groove 434) with respect to the axis line segment PQ corresponds to the movement of the first hinge plate 410 with respect to the door body 20.

[0202] Since the first hinge plate 410 is stationary with respect to the box body 10, the movement of the axis line segment PQ with respect to the track groove also corresponds to the movement of the box body 10 with respect to the door body 20. According to the relativity of motion, the movement of the door body 20 with respect to the box body 10 is obtained from the movement of the box body 10 with respect to the door body 20.

[0203] For the sake of convenience of description, in the following description, the movement of the box body 10 with respect to the door body 20 is represented by the movement of the axis line segment PQ with respect to the door body 20, and the movement of the door body 20 with respect to the box body 10 is derived based on the principle of relative motion.

[0204] It is understood that the entire opening process of the door body 20 may be divided into three stages with the opening angles G2 and G7 of the door body 20 as the boundary angles. In the following, these three stages will be described in detail by combining the fitting relationship between the first two-axis assembly 420 and the track groove and the movement track of the axis line segment PQ.

[0205] [First stage]

[0206] In the first stage, as shown in FIG. 15B, the door body 20 opens from 0° to the second angle G2 through the first angle G1. During this process, the positioning center point P moves in a direction approaching the door side wall 21 along the linear track segment of the first track line S from the initial positioning point P0, and the guide center point Q moves in a direction approaching the door side wall 21 and away from the door front wall 22 along the second track line K from the initial guide point Q0.

[0207] The positioning center point P moves from the initial positioning point P0 along the linear trajectory segment of the first trajectory line S through the first positioning point P1 to the second positioning point P2. The guide center point Q moves from the initial guide point Q0 through the first guide point Q1 to the second guide point Q2 along the second trajectory line K.

[0208] In the first stage, with reference to the first trajectory groove 433 and the second trajectory groove 434, the axis line segment PQ moves outward while rotating. For example, the axis line segment PQ rotates clockwise from P0Q0 and sequentially moves to P1Q1 and P2Q2 toward the outside.

[0209] It is understood that the first trajectory groove 433 and the second trajectory groove 434 are stationary with respect to the door body 20, the axis line segment PQ is stationary with respect to the box body 10, and the movement of the axis line segment PQ can represent the movement of the box body 10. Therefore, when the door body 20 is used as the reference object, during the process of the door body 20 opening from the closed state to the second angle G2, the box body 10 rotates clockwise with respect to the door body 20 and moves a certain distance toward the outside. According to the relativity of movement, when the box body 10 is used as the reference object, during the process of the door body 20 opening from the closed state to the second angle G2, the door body 20 rotates counterclockwise with respect to the box body 10 and moves a certain distance toward the inside.

[0210] In this way, while the first side edge W moves outward due to the rotation of the door body 20, the first side edge W further moves inward due to the inward movement of the door body, preventing interference between the door body 20 and the box body 100.

[0211] [Second stage]

[0212] In the second stage, as shown in FIGS. 15B to 15G and FIG. 16, the door body 20 sequentially opens from the second angle G2 to the third angle G3, the fourth angle G4, the fifth angle G5, and the sixth angle G6 to the seventh angle G7.

[0213] During this process, the positioning center point P moves from the second positioning point P2 to the seventh positioning point P7 along the curved trajectory segment of the first trajectory line S in the direction approaching the door side wall 21 and the door front wall 22, passing through the third positioning point P3, the fourth positioning point P4, the fifth positioning point P5, and the sixth positioning point P6. The guide center point Q moves from the second guide point Q2 to the seventh guide point Q7 along the second trajectory line K in the direction approaching the door side wall 21 and away from the door front wall 22, passing through the third guide point Q3, the fourth guide point Q4, the fifth guide point Q5, and the sixth guide point Q6.

[0214] In the second stage, with the first trajectory groove 433 and the second trajectory groove 434 as the reference objects, the axial center line segment PQ moves outward while rotating. For example, the axial center line segment PQ rotates clockwise from P2Q2 and moves outward to P3Q3, P4Q4, P5Q5, P6Q6, P7Q7 in sequence.

[0215] It is understood that the first trajectory groove 433 and the second trajectory groove 434 are stationary with respect to the door body 20, the axial center line segment PQ is stationary with respect to the box body 10, and the movement of the axial center line segment PQ can represent the movement of the box body 10. Therefore, when taking the door body 20 as the reference object, during the process of the door body 20 opening from the second angle G2 to the seventh angle G7, the box body 10 rotates clockwise with respect to the door body 20 and moves outward and forward (in the direction approaching the door body 20) along the curved trajectory segment. According to the relativity of motion, when taking the box body 10 as the reference object, during the process of the door body 20 opening from the second angle G2 to the seventh angle G7, the door body 20 rotates counterclockwise with respect to the box body 10 and moves inward and backward (in the direction approaching the box body 10) along the curved trajectory segment.

[0216] In this way, while the first side edge W moves outward due to the rotation of the door body 20, the first side edge W further moves inward due to the inward movement of the door body 20, preventing interference between the door body 20 and the box body 100. Also, by the door body 20 rotating and further moving in the direction approaching the box body 10, it is possible to prevent the door body 20 from moving too far away from the box body 10 in the direction away from the box body 10 due to rotation, and the integrity between the door body 20 and the box body 10 can be improved.

[0217] [Third stage]

[0218] In the third stage, as shown in FIGS. 15H, 15I and 17, the door body 20 opens from the seventh angle G7 (about 90°) through the eighth angle G8 to the maximum angle G9.

[0219] In this process, the positioning center point P moves from the seventh positioning point P7 through the eighth positioning point P8 to the ninth positioning point P9 in a direction away from the door side wall 21 and the door front wall 22 along the curved trajectory segment of the first trajectory line S. The guide center point Q moves from the seventh guide point Q7 through the eighth guide point Q8 to the ninth guide point Q9 in a direction approaching the door side wall 21 and away from the door front wall 22 along the second trajectory line K.

[0220] In the third stage, with reference to the first trajectory groove 433 and the second trajectory groove 434, as the door body 20 opens from the seventh angle G7 to the maximum angle G9, the axial center line segment PQ moves inward while rotating clockwise. For example, the axial center line segment PQ rotates clockwise from P7Q7 and sequentially moves inward to P8Q8 and P9Q9.

[0221] It is understood that the first trajectory groove 433 and the second trajectory groove 434 are stationary with respect to the door body 20, the axial center line segment PQ is stationary with respect to the box body 10, and the movement of the axial center line segment PQ can represent the movement of the box body 10.

[0222] Therefore, when taking the door body 20 as the reference object, as the door body 20 opens from the seventh angle G7 to the maximum angle G9, the box body 10 rotates clockwise with respect to the door body 20 and moves inward and rearward (in the direction away from the door body 20). According to the relativity of motion, when taking the box body 10 as the reference object, as the door body 20 opens from the seventh angle G7 to the maximum angle G9, the door body 20 rotates counterclockwise with respect to the box body 10 and moves outward and forward (in the direction away from the box body 10).

[0223] In the third stage, since the door body 20 opens from 90° to a larger angle (i.e., the maximum angle G9), it is understood that although the first side edge W does not interfere with the cabinet 100, it may still interfere with the cabinet 10.

[0224] Therefore, in the third stage, the door body 20 is arranged to rotate counterclockwise with respect to the box body 10 and move outward and forward (in the direction away from the box body 10). The first side edge W moves in the direction away from the box body 10 under the drive of the door body 20, preventing interference between the first side edge W and the box body 10. Also, since the door body 20 moves outward, in the third stage, the door body 20 can open to a larger angle, and it can be prevented that the door body 20 closes the access opening.

[0225] Combining the first stage and the second stage, in the process of the door body 20 opening from the closed state to the seventh angle G7, the door body 20 always maintains a tendency to move inward. The distance that the door body 20 moves inward when the door body 20 opens to the seventh angle G7 with respect to the closed state of the door body 20 is called the first distance D1.

[0226] In the third stage of the door body 20 opening, when the door body 20 opens to the maximum angle G9 with respect to the state where the door body 20 has opened to the seventh angle G7, the distance that the door body 20 moves outward is called the second distance D2.

[0227] In some embodiments, the first distance D1 is greater than the second distance D2. That is, the lateral displacement in which the door body 20 first moves inward is greater than the lateral displacement in which the door body 20 then moves outward.

[0228] As described above, in the process of the door body 20 opening from the closed state to the maximum angle G9, the door body 20 rotates around an axis that dynamically changes. This dynamically changing axis first moves the first distance D1 inward, and then moves the second distance D2 outward, causing the door body 20 to first move the first distance D1 inward and then move the second distance D2 outward. The first shaft 421 always moves with respect to the first track groove 433, and the second shaft 422 always moves with respect to the second track groove 434.

[0229] In some embodiments, during the process of the door body 20 opening from the closed state to the maximum angle G9, the relative positional relationship between the center of mass plane F and the first axis 421 and the second axis 422 continuously changes.

[0230] Referring to FIGS. 14A to 14B, when the door body 20 is opened from the closed state to the third angle G3, the first axis 421 and the second axis 422 are located on the same side of the center of mass plane F.

[0231] Referring to FIGS. 14E to 14J, during the process of the door body 20 opening from the fourth angle G4 to the maximum angle G9, the center of mass plane F is located between the first axis 421 and the second axis 422.

[0232] For most of the opening process of the door body 20 (the opening angle is within the range of about 45° to about 116°), since the center of mass plane F is always located between the first axis 421 and the second axis 422, it is understood that the stability during the opening process of the door body 20 can be improved.

[0233] The following will detail the relative positional relationship between the center of mass plane F and the first axis 421 and the second axis 422 with reference to the change trend of the distance between the midpoint of the axis line segment PQ and the center of mass plane F during the opening process of the door body 20.

[0234] Referring to FIGS. 14E to 14J, the midpoint of the axis line segment PQ is called the axis center midpoint E. The distance between the axis center midpoint E and the center of mass plane F is called the offset distance I. When the axis center midpoint E is located on the side closer to the front door wall 22 of the center of mass plane F, the offset distance I is a positive number. When the axis center midpoint E is located on the side away from the front door wall 22 of the center of mass plane F, the offset distance I is a negative number. When the axis center midpoint E is located on the center of mass plane F, the offset distance I is 0.

[0235] In the process of the door body 20 opening from the fourth angle G4 to the maximum angle G9, the offset distance I between the axial center point E and the mass center plane F tends to decrease. For example, when the door body 20 is sequentially opened to the fourth angle G4, the fifth angle G5, the sixth angle G6, the seventh angle G7, the eighth angle G8, and the maximum angle G9, the offset distances are called I4, I5, I6, I7, I8, and I9. For example, I4 > I5 > I6 > I7 > I8 > 0 ≥ I9.

[0236] In the process of the door body 20 opening, as the opening angle increases, the moment of the door body 20 increases, so it is understood that the stability of the door body 20 deteriorates and hand tremors are likely to occur.

[0237] Therefore, in some embodiments of the present disclosure, the offset distance I between the axial center point E and the mass center plane F is configured such that the offset distance I decreases as the opening angle of the door body 20 increases. That is, as the opening angle of the door body 20 increases, the mass center plane F moves closer to the midpoint of the axial center line segment PQ, so the stability of the door body 20 during the opening process is improved.

[0238] In some embodiments, when the opening angle of the door body 20 is G a the axial center point E is located on the mass center plane F and the offset distance I is 0. For example, the angle G a is any value within the range of 110° to 116° (for example, 110°, 113°, 116°). In this way, referring to FIG. 14J, when the door body 20 is opened to the maximum angle G9, the mass center plane F approaches the axial center point E (for example, I9 is any value within the range of -1 mm to 1 mm), which is advantageous for improving the stability when the door body 20 is opened to the maximum angle G9.

[0239] In some embodiments, during the process of the door body 20 opening from the eighth angle G8 (about 90°) to the maximum angle G9, the offset distance I is any value within the range of -4 mm to 4 mm (for example, -4 mm, 0, or 4 mm). Thereby, when the door body 20 is opened to a relatively large angle (for example, the door body is opened to the included angle between the eighth angle G8 and the maximum angle G9), the stability of the door body 20 can be effectively enhanced.

[0240] In some embodiments, as shown in FIGS. 15B and 16, during the process of opening from the closed state to the second angle G2 (that is, the first stage of the door body opening), the first shaft 421 linearly moves along the straight groove segment of the first track groove 433. And when the door body 20 rotates by a unit angle, the third distance D3 (that is, the first margin distance) moves inward. During the process of the door body 20 opening from the second angle G2 to the seventh angle G7 (for example, the second stage of the door body opening), the first shaft 421 moves in a curved path along the curved groove segment of the first track groove 433. And when the door body 20 rotates by a unit angle, the door body 20 moves the fourth distance D4 (that is, the second margin distance) inward. Also, the third distance D3 is greater than the fourth distance D4 (D3 > D4).

[0241] In the first stage of the door body 20 opening, since the distance that the door body 20 moves inward when the door body 20 opens by a unit angle is large, it is understood that the distance that the first side edge W of the door body 20 moves inward becomes large. Therefore, the distance that the first side edge W exceeds the reference plane M0 is smaller than the width of the first gap 101, preventing the first side edge W from colliding with the box body 100.

[0242] In some embodiments, as shown in FIG. 17, during the process of the door body 20 opening from the seventh angle G7 to the maximum angle G9, the first shaft 421 moves backward along the first locus line S in a direction away from the door side wall 21 and the door front wall 22. The stage of the door body 20 opening from the seventh angle G7 to the eighth angle G8 is called the first backward stage, and the stage of the door body 20 opening from the eighth angle G8 to the maximum angle G9 is called the second backward stage.

[0243] In the first retraction stage, when the door body 20 opens at each unit angle, the door body 20 moves the fifth distance D5 outward. In the second retraction stage, when the door body 20 opens at each unit angle, the door body 20 moves the sixth distance D6 outward, and the sixth distance D6 is greater than the fifth distance D5 (D6>D5). For example, the fifth distance D5: the sixth distance D6 ∈ [0.05, 0.1].

[0244] In the first retraction stage, the door body 20 opens from the seventh angle G7 (about 65°) to the eighth angle G8 (about 90°). When the door body 20 opens at each unit angle, the distance that the door body 20 moves outward is small. Therefore, when the door body 20 opens to 90°, it is avoided that the door body 20 exceeds the reference plane M0 too much. Thereby, the door body 20 can continue to open to a larger angle.

[0245] In the second retraction stage, the door body 20 opens from 90° to the maximum angle G9. When the door body 20 opens at each unit angle, the distance that the door body 20 moves outward is large. Therefore, it is advantageous to prevent the door body 20 from blocking the access opening and to improve the experience when the user puts in or takes out food.

[0246] In some embodiments, as shown in FIGS. 18 and 19, when the door body 20 opens to the maximum angle G9, the positioning center point P is located at the ninth positioning point P9. When the door body 20 opens to the third angle G3, the positioning center point P is located at the third positioning point P3. The difference between the maximum angle G9 and the third angle G3 is about 90°, and the ninth positioning point P9 is close to the third positioning point P3.

[0247] For example, the difference between the maximum angle G9 and the third angle G3 is any value within the range of 88° to 92° (for example, 88°, 90° or 92°). The distance between the ninth positioning point P9 and the third positioning point P3 is 1 mm or less.

[0248] In this way, during the process of the door body 20 opening from the third angle G3 to the maximum angle G9, the first shaft 421 first moves from the third positioning point P3 to the seventh positioning point P7 in a direction approaching the door side wall 21 and the door front wall, and then moves from the door side wall 21 and the door front wall in a direction away from them to the ninth positioning point P9 close to the third positioning point P3. That is, during the process of the door body 20 opening from the third angle G3 to the maximum angle G9, the first shaft 421 performs a substantially reciprocating motion.

[0249] By setting the ninth positioning point P9 to approach the third positioning point P3, the first shaft 421 can reciprocate within the first track groove 433. It is understood that this is advantageous for reducing the thickness of the door body 20 because it reduces the dimension of the first track groove 433 in the thickness direction of the door body 20.

[0250] In some embodiments, the second track groove 434 includes a first curve groove and a second curve groove. Correspondingly, the second track line K includes a first curve segment and a second curve segment. One end of the first curve segment is closer to the door front wall 22 than the other end of the first curve segment and is away from the door side wall 21. One end of the second curve segment is connected to the other end of the first curve segment, and the other end of the second curve segment extends in a direction approaching the door side wall 21 and away from the door front wall 22.

[0251] The first side edge W is located on the concave side of the first curve segment and on the convex side of the second curve segment.

[0252] During the process of the door body 20 opening from the eighth angle G8 to the ninth angle G9, the second shaft 422 moves within the second curve groove, and the guide center point Q moves from one end of the second curve segment to the other end, while the first shaft 421 moves within the first track groove 433.

[0253] In some embodiments, the second trajectory groove 434 includes a third curve groove and a fourth curve groove. Correspondingly, the second trajectory line K includes a third curve segment and a fourth curve segment. One end of the third curve segment is closer to the door front wall 22 than the other end of the third curve segment and is farther from the door side wall 21. One end of the fourth curve segment is connected to the other end of the third curve segment, and the other end of the fourth curve segment extends in a direction approaching the door side wall 21 and the door front wall 22.

[0254] The first side edge W is located on the concave side of the third curve segment and on the concave side of the fourth curve segment.

[0255] During the process of the door body 20 opening from the eighth angle G8 to the ninth angle G9, the second shaft 422 moves within the second curve groove, the guide center point Q moves from one end of the fourth curve segment to the other end, and the first shaft 421 moves within the first trajectory groove 433.

[0256] In some embodiments, as shown in FIG. 14A, when the door body 20 is closed, the positioning center point P of the first shaft 421 is located at the initial positioning point P0 of the first trajectory line S, and the distance between the initial positioning point P0 and the reference plane M0 is L1 (i.e., the first set distance). The door front wall 22 is substantially parallel to the plane where the access opening is located and is substantially perpendicular to the reference plane M0.

[0257] As shown in FIG. 14I, when the door body 20 is opened to about 90°, the door front wall 22 is substantially parallel to the box side wall 12. The positioning center point P of the first shaft 421 is located at the eighth positioning point P8 of the first trajectory line S, and the distance between the positioning center point P and the door front wall 22 is L2 (i.e., the second set distance).

[0258] When the door body 20 is opened to about 90°, when L1 and L2 are substantially equal (i.e., the difference between L1 and L2 is 1 mm or less), it is understood that the door front wall 22 is substantially located within the reference plane M0. When L1 is greater than L2, the door front wall 22 is located inside the reference plane M0. When L1 is less than L2, the door front wall 22 is located outside the reference plane M0.

[0259] Therefore, in some embodiments of the present disclosure, L1 and L2 are set to be approximately equal or L1 is set to be larger than L2. In this way, the door body 20 can be opened from 90° to a larger angle. In some embodiments, L1 and L2 may be set such that L1 is smaller than L2 and the difference between L2 and L1 is smaller than 0.2 times the width of the first gap 101, thereby enhancing the stability of the door body 20 when opened from 90° to a larger angle.

[0260] In some embodiments, as shown in FIG. 20, a plane located outside the reference plane M0 is defined as the first reference plane M1. The first reference plane M1 is parallel to the reference plane M0, and the distance between the first reference plane M1 and the reference plane M0 is the width of the first gap 101 (i.e., 3 mm to 5 mm).

[0261] In some embodiments, the first reference plane M1 is a plane where the inner wall of the cabinet 100 close to the reference plane M0 is located.

[0262] The plane where the access opening is located is defined as the second reference plane M2, and the second reference plane M2 is perpendicular to the first reference plane M1. The first reference plane M1 and the second reference plane M2 are stationary with respect to the cabinet body 10. That is, during the opening process of the door body 20 with respect to the cabinet body 10, the first reference plane M1 and the second reference plane M2 do not move as the door body 20 moves.

[0263] The plane where the top wall of the cabinet body 10 is located is defined as the horizontal reference plane. The horizontal reference plane is perpendicular to the first reference plane M1 and the second reference plane M2, and the first side edge W and the second side edge N are perpendicular to the horizontal reference plane. The orthographic projection of the first side edge W on the horizontal reference plane is the first projection point W', and the orthographic projection of the second side edge N on the horizontal reference plane is the second projection point N'.

[0264] Note that the second reference plane M2 is the plane where the access opening defined by the box body 10 is located, and it will not move forward due to the deformable door body seal or other members provided at the access opening of the box body.

[0265] Referring to FIG. 20, in the process of the door body 20 opening from the closed state to the fifth angle G5, the first projection point W' moves in a direction approaching the first reference plane M1 and the second reference plane M2 along the first side edge locus W0W5. That is, in the process of the door body 20 opening from the closed state to the fifth angle G5, the distance between the first side edge W and the first reference plane M1 tends to decrease, and the distance that the first side edge W exceeds the reference plane M0 tends to increase. When the door body 20 is opened to the fifth angle G5, the distance that the first side edge W exceeds the reference plane M0 is the largest, and the distance between the first side edge W and the first reference plane M1 is the smallest.

[0266] In this way, it is possible to prevent the first side edge W from colliding with the cabinet 100 during the opening process of the door body 20.

[0267] In the process of the door body 20 opening from the closed state to the fifth angle G5, the second projection point N' first moves in a direction away from the first reference plane M1 and approaching the second reference plane M2 along the second side edge locus N0N3, and then moves in a direction away from the first reference plane M1 and away from the second reference plane M2 along the second side edge locus N3N5.

[0268] That is, in the process of the door body 20 opening from the closed state to the third angle G3, the distance between the second side edge N and the second reference plane M2 tends to decrease. In the process of the door body 20 opening from the third angle G3 to the fifth angle G5, the distance between the second side edge N and the second reference plane M2 tends to increase. When the door body 20 is opened to the third angle G3, the distance between the second side edge N and the second reference plane M2 is the smallest. With this arrangement, the interference between the second side edge N of the door body 20 and the box body 10 during the opening process of the door body 20 can be effectively avoided.

[0269] In some embodiments, both the first side edge locus W0W5 and the second side edge locus N0N5 are smooth curves.

[0270] In some embodiments, the distance between the first side edge locus W0W5 and the first reference plane M1 is greater than the seventh distance D7. That is, the distance between the first side edge locus point W5, which is the closest to the first reference plane M1 on the first side edge locus W0W5, and the first reference plane M1 is greater than the seventh distance D7. The distance between the second side edge locus N0N5 and the second reference plane M2 is greater than the eighth distance D8.

[0271] In some embodiments, when the thickness of the door body is Da, the seventh distance D7 is not less than 0.5×Da and not more than 0.75×Da, and the eighth distance D8 is not less than 0.12×Da and not more than 0.2×Da.

[0272] For example, when the thickness Da of the door body 20 is any value within the range of 2 cm to 4 cm, the seventh distance D7 may be 0.676×Da, and the eighth distance D8 may be 0.165×Da.

[0273] With such an arrangement, in the process of the door body 20 opening from the closed state to the fifth angle G5, the second side edge N can maintain an appropriate distance from the box body 10. For example, the reduction in the integrity between the door body 20 and the box body 10 caused by the second side edge N pressing against the box body 10 or being too far away from the box body 10 does not occur.

[0274] Also, in the process of the door body 20 opening from the closed state to the fifth angle G5, the distance by which the first side edge W exceeds the reference plane M0 is relatively small, and the first side edge W does not collide with the inner wall of the cabinet 100, which is advantageous for improving the stability of the door body 20.

[0275] In some embodiments, as shown in FIG. 20, in the process of the door body 20 opening from the closed state to the fifth angle G5, the included angle between the movement direction of the first side edge W and the first reference plane M1 is referred to as the first direction included angle, and the first direction included angle is less than 15°. The included angle between the movement direction of the second side edge N and the second reference plane M2 is referred to as the second direction included angle, and the second direction included angle is less than 25°. In this way, in the process of the door body 20 opening, the first side edge W does not collide with the cabinet 100, and the second side edge N does not press against the box body 10.

[0276] Note that the moving direction of the first side edge W is the tangent direction of the first side edge locus W0W5 at the first projection point W' located on the first side edge locus W0W5. The moving direction of the second side edge N is the tangent direction of the second side edge locus N0N5 at the first projection point N' located on the second side edge path N0N5.

[0277] In the process of the door body 20 opening from the closed state to the fifth angle G5, the first direction included angle between the moving direction of the first side edge W and the first reference plane M1 tends to decrease. The second direction included angle between the moving direction of the second side edge portion N and the second reference plane M2 tends to decrease. Also, the second direction included angle first decreases to 0°, and then continues to decrease to a negative angle. Therefore, in the process of the door body 20 opening, the second side edge N first approaches the second reference plane M2 and then moves away from the second reference plane M2. Such an arrangement is advantageous for improving the smoothness of the opening of the door body 20 and avoiding snagging.

[0278] In some embodiments, in the process of the door body 20 opening from the closed state to the fifth angle G5, the orthographic projection of the first side edge locus W0W5 on the first reference plane M1 is the line segment W0'W5', and the orthographic projection of the second side edge locus N0N5 on the second reference plane M2 is the line segment N0'N5'. The ratio of the length of the line segment W0'W5' to the length of the line segment N0'N5' is within the range of 0.3 to 0.7. For example, the ratio of the length of the line segment W0'W5' to the length of the line segment N0'N5' is 0.3, 0.4, 0.5, or 0.7.

[0279] Referring to FIG. 20, in the process of the door body 20 opening from the fifth angle G5 to the maximum angle G9, the first projection point W' moves along the first side edge locus W5W9 in a direction away from the first reference plane M1 and approaching the second reference plane M2, and the distance between the first side edge W and the first reference plane M1 tends to increase. The second projection point N' moves along the second side edge locus N5N9 in a direction away from the second reference plane M2 and the first reference plane M1, and the distance between the second side edge N and the second reference plane M2 tends to increase.

[0280] In some embodiments, both the first side edge locus W5W9 and the second side edge locus N5N9 are smooth curves. The first side edge locus W0W5 is smoothly connected to the third side edge locus W5W9, and the second side edge locus N0N5 is smoothly connected to the second side edge locus N5N9.

[0281] In some embodiments, during the process of the door body 20 opening from the fifth angle G5 to the maximum angle G9, the included angle between the moving direction of the first side edge W and the first reference plane M1 is called the third direction included angle, and the third direction included angle is less than 40°. The included angle between the moving direction of the second side edge N and the second reference plane M2 is called the fourth direction included angle, and the fourth direction included angle is less than 90°.

[0282] It should be noted that the moving direction of the first side edge W is the tangent direction of the first side edge locus W5W9 where the first projection point W' on the first side edge locus W5W9 is located. The moving direction of the second side edge N is the tangent direction of the second side edge locus N5N9 where the second projection point N' on the second side edge locus N5N9 is located. Thereby, the door body 20 does not exceed the reference plane M0 too much during the opening process.

[0283] During the process of the door body 20 opening from the fifth angle G5 to the maximum angle G9, the third direction included angle tends to increase, and the fourth direction included angle also tends to increase. Also, when the door body 20 opens by a unit angle, the increments of the third direction included angle and the fourth direction included angle are basically constant.

[0284] For example, during the process of the door body 20 opening from the fifth angle G5 to the maximum angle G9, when the door body 20 opens by a unit angle, the increment of the third direction included angle is maintained at any value within the range of 0.7° to 1.5° (for example, 0.7°, 0.9°, 1.2° or 1.5°), and the increment of the fourth direction included angle is maintained at any value within the range of 0.4° to 1° (for example, 0.4°, 0.6°, 0.8° or 1°).

[0285] With such an arrangement, the change tendencies of the first side edge locus W5W9 and the second side edge locus N5N9 are stable and gentle, which is beneficial to improving the smoothness of the rotation of the door body 20.

[0286] In some embodiments, during the process in which the door body 20 opens from the fifth angle G5 to the maximum angle G9, when the door body 20 opens at each unit angle, the increment of the included angle in the third direction is an arbitrary value within the range of 0.7° to 1.5° (for example, 0.7°, 0.9°, 1.2°, or 1.5°), and the increment of the included angle in the fourth direction can be an arbitrary value within the range of 0.4° to 1° (for example, 0.4°, 0.6°, 0.8°, or 1°).

[0287] As shown in FIG. 21, the direction in which the positioning center point P moves along the first locus line S is denoted as the first displacement direction, and the direction in which the guide center point Q moves along the second locus line K is denoted as the second displacement direction. The included angle formed by the first displacement direction and the second displacement direction is denoted as the displacement included angle ω.

[0288] During the process in which the door body 20 opens from the closed state to the second angle G2, the door body 20 rotates to the first intermediate angle Gi and the second intermediate angle Gii. Both the first intermediate angle Gi and the second intermediate angle Gii are arbitrary values within the range of 0° to the second angle G2, and the first intermediate angle Gi is not equal to the second intermediate angle Gii (that is, Gi≠Gii).

[0289] In some embodiments, the displacement included angle ω formed by the first displacement direction and the second displacement direction is substantially constant. Note that "substantially constant" means that the displacement included angle ω changes within a small range in order to maintain relative constancy.

[0290] For example, when the door body 20 opens to the first intermediate angle Gi, the displacement included angle formed by the first displacement direction and the second displacement direction is denoted as the first displacement included angle ω Gi Gi, and when the door body 20 opens to the second intermediate angle Gii, if the displacement included angle formed by the first displacement direction and the second displacement direction is denoted as the second displacement included angle ωGii, the difference between the first displacement included angle ωGi and the second displacement included angle ωGii is less than or equal to a preset angle. For example, the preset angle is 8°.

[0291] In some embodiments, as shown in FIG. 21, when the door body 20 is closed, the displacement included angle is ω0; when the door body 20 is opened to the first angle G1, the displacement included angle is ω1; when the door body 20 is opened to the second angle G2, the displacement included angle is ω2. Here, the difference Δω between the displacement included angle ω1 and the displacement included angle ω2 is within the range of 0° to 4°.

[0292] For example, Δω may be 0°, 2° or 4°. Both the displacement included angle ω1 and the displacement included angle ω2 are any values within the range of 56° to 60°.

[0293] In some embodiments, during the process of the door body 20 opening from the closed state to the second angle G2, since the first shaft 421 performs linear motion in the linear groove segment where the first track groove 433 is located, the angle between the first displacement direction and the first reference plane M1 is constant. During the process of the door body 20 opening from the second angle G2 to the seventh angle G7, the first shaft 421 performs curvilinear motion in the curved groove segment of the first groove. Therefore, the angle between the first displacement direction and the first reference plane M1 tends to decrease.

[0294] In some embodiments, the curved groove segment of the first track groove 433 is a substantially arc groove, that is, the curved track segment of the first track line S is a substantially arc. During the process of the door body 20 opening from the second angle G2 to the seventh angle G7, the first shaft 421 performs arc motion with an equal radius with respect to the first track groove 431. The angle between the first displacement direction and the first reference plane M1 is within the range of 32° to 35° (for example, 32°, 33°, 34° or 35°).

[0295] It should be noted that the substantially arc groove is a groove having a center track line of a substantially arc. The substantially arc includes a standard arc (that is, a part of a standard circle) and a non-standard arc that is different from the standard arc due to manufacturing, assembly errors or slight deformations but still has arc track characteristics.

[0296] During the process of the door body 20 opening from the closed state to the maximum angle G9, the angle between the second displacement direction and the second reference plane M2 tends to decrease, and this angle is within the range of 12° to 15° (for example, 12°, 13° or 15°).

[0297] In such an arrangement, during the process of the door body 20 opening from the closed state to the maximum angle G9, the change in the displacement included angle ω is small. Therefore, when the user opens the door body 20 with a certain force (about 5 N), the force applied to the first biaxial assembly 420 hardly changes, improving the smoothness of the movement when the door is opened, reducing the wear of the above-mentioned track groove of the first biaxial assembly during the process of the door body opening, and improving the service life of the hinge assembly 30.

[0298] In some embodiments, as shown in FIG. 22, when the door body 20 is closed, the plane where the front door wall 22 is located is called the third reference plane M3. The third reference plane M3 and the reference plane M0 intersect at the theoretically first side edge W when the door body 20 is closed.

[0299] The angle bisecting plane formed by the front door wall 22 and the side door wall 21 is called the angle bisecting plane H (that is, the fourth reference plane). The dihedral angle between a part of the third reference plane M3 located inside the reference plane M0 and a part of the reference plane M0 located on the side close to the box body 10 of the third reference plane M3 is called the first included angle σ, and σ is about 90°. When the door body 20 is in the closed state, the angle bisecting plane H equally divides the first included angle σ.

[0300] It should be noted that only when the door body 20 is in the closed state, the angle bisecting plane H equally divides the first included angle σ. During the process of the door body 20 opening with respect to the box body 10, the angle bisecting plane H moves with the door body 20 with respect to the box body 10, and the first included angle σ remains stationary.

[0301] When the door body 20 is in the closed state, the first side edge W is located on the reference plane M0, that is, the first side edge W is the intersection line of the third reference plane M3 and the reference plane M0.

[0302] When the door body 20 is closed, the positioning center point P is located at the initial positioning point P0 of the first trajectory line S. The shortest line segment between the initial positioning point P0 and the first side edge W is called WP0, and the included angle between the line segment WP0 and the straight-line trajectory segment of the first trajectory line S is called θ, where 0° < θ < 90°. The distance between the first side edge W and the straight line on which the straight-line trajectory segment in the first trajectory line S is located is R, and R is a constant value.

[0303] It is understood that by setting the distance between the initial positioning point P0 and the door side wall 21, the magnitude of the included angle θ can be changed. For example, when the initial positioning point P0 is configured to approach the door side wall 21, the included angle θ becomes larger and approaches 90°. When the initial positioning point P0 is configured to move away from the door side wall 21, the included angle θ becomes smaller and approaches 0°.

[0304] When the door body 20 rotates and opens with only the first axis 421 (the positioning center point P is located at the initial positioning point P0) as the rotation axis, when the door body 20 rotates to a position where the line segment WP0 is parallel to the second reference plane M2, the distance D between the first side edge W and the reference plane M0 becomes the maximum, and it is understood that the maximum value of the distance D is Dmax = R / sinθ - Rcotθ = R(1 / sinθ - cotθ). When the door body 20 rotates from the closed state until the line segment WP0 becomes parallel to the second reference plane M2, the door body 20 rotates by an included angle θ around the first axis 421.

[0305] Therefore, by differentiating Dmax with respect to (θ), the following formula 22 is obtained.

[0306] (Formula 21) JPEG0007700371000021.jpg22170

[0307] Since θ ∈ (0°, 90°), (R / sin2θ) × (1 - cosθ) > 0. That is, Dmax = R / sinθ - Rcotθ = R(1 / sinθ - cotθ) is an increasing function with respect to θ.

[0308] As shown in Fig. 22, any point located on the side of the angular bisecting plane H closer to the door side wall 21 on the first trajectory line S is marked as the first set position A1, the intersection point of the straight line trajectory segment and the angular bisecting plane H is marked as the second set position A2, and any point on the straight line trajectory segment located on the side of the angular bisecting plane H away from the door side wall 21 is marked as the third set position A3. The shortest line segment from the first set position A1 to the first side edge W is marked as the line segment WA1, and the included angle between the line segment WA1 and the straight line trajectory segment is marked as θ1. The shortest line segment from the second set position A2 to the first side edge W is marked as the line segment WA2, and the included angle between the line segment WA2 and the straight line trajectory segment of the first trajectory is marked as θ2. The shortest line segment from the third set position A3 to the first side edge W is marked as the line segment WA3, and the included angle between WA3 and the straight line trajectory segment of the first trajectory line is marked as θ3. For example, θ1 is larger than θ2, and θ2 is larger than θ3.

[0309] Since Dmax = R / sinθ - Rcotθ is an increasing function with respect to θ, Dmax(θ1) > Dmax(θ2) > Dmax(θ3).

[0310] Therefore, when the door body 20 is closed and is configured such that the initial positioning point P0 is located at the first set position A1, during the process of the door body 20 rotating and opening with only the first axis 421 as the rotation center, the distance that the first side edge W exceeds the reference plane M0 is relatively large.

[0311] When the door body 20 is closed and the initial positioning point P0 is installed at the third installation position A3, during the process of the door body 20 rotating and opening with only the first axis 421 as the rotation center, the distance that the first side edge W exceeds the reference plane M0 is relatively small.

[0312] When a biaxial hinge is used in the refrigerator 1, in order to avoid the collision between the door body 20 and the cabinet 100 during the opening process of the door body 20, it is understood that the door body 20 needs to move a certain distance inward while rotating. Therefore, the larger the distance between the arrangement position of the initial positioning point P0 and the door side wall 21, the smaller the maximum distance Dmax that the first side edge W exceeds the reference plane M0 during the rotation of the door body 20. As a result, the distance that the door body 20 moves inward while rotating becomes smaller.

[0313] However, when the distance between the initial positioning point P0 and the door side wall 21 is configured to be too large, the smoothness and stability of the door body 20 when it opens will decrease. Therefore, in some embodiments, the initial positioning point P0 is arranged on the angular bisector plane H, that is, the angular bisector plane H divides the first axis 421 substantially equally.

[0314] As can be seen from the above, by changing the position of the initial positioning point P0 with respect to the angular bisector plane H, when the door body 20 rotates and opens up to 90°, the distance between the door body 20 and the first reference plane M1 can be changed.

[0315] For example, when the distance between the initial positioning point P0 and the door side wall 21 increases, when the door body 20 rotates and opens up to 90°, the distance between the door body 20 and the first reference plane M1 also increases, and the possible maximum opening angle of the door body 20 increases.

[0316] In some embodiments, referring to FIG. 14I, when the door body 20 opens up to 90°, the distance between the front door wall 22 and the reference plane M0 is denoted as the ninth distance D9. When the front door wall 22 is located inside the reference plane M0, the ninth distance D9 is a positive number, and when the front door wall 22 is located outside the reference plane, the ninth pitch D9 is a negative number.

[0317] In some embodiments, as shown in FIG. 23, when the door body 20 is closed, the initial positioning point P0 is located at the first installation position A1. When the door body 20 is opened to 90°, the ninth distance D9 is 0, that is, the front door wall 22 is basically located in the reference plane M0. The distance A1A2 between the first setting position A1 and the second setting position A2 is greater than 0 and less than or equal to 2 mm.

[0318] With such an arrangement, the initial positioning point P0 is set to be close to the angular bisecting plane H, ensuring the stability of the first axis 421 when the first axis 421 moves relative to the door body 20. On the other hand, when the door body 20 is opened to 90°, since the front door wall 22 does not exceed the reference plane M0, the door body 20 can be opened to a larger angle when the refrigerator 1 is used with being fitted into the cabinet 100.

[0319] In some embodiments, as shown in FIG. 24, the initial positioning point P0 is located at the third setting position A3 on the side away from the door side wall 21 of the angular bisecting plane H. In this case, when the door body 20 is opened to 90°, the ninth distance D9>0, that is, the front door wall 22 is located inside the reference plane M0. For example, the ninth distance D9 is any value within the range of 0.5 mm to 2 mm. The distance A2A3 between the second setting position A2 and the third setting position A3 is greater than 0 and less than or equal to 2 mm.

[0320] With such an arrangement, the initial positioning point P0 is set to be close to the angular bisecting plane H, ensuring the stability of the first axis 421 when the first axis 421 moves relative to the door body 20. On the other hand, when the door body 20 is opened to 90°, the door body 20 is located inside the reference plane M0, and the door body 20 can be opened to a larger angle when the refrigerator 1 is used with being fitted into the cabinet 100.

[0321] In some embodiments, during the process of opening the door body 20, when the positioning center point P of the first shaft 421 moves to the end portion close to the door side wall 21 of the linear trajectory segment (i.e., the second positioning point P2), the opening angle of the door body 20 is within the range of 43° to 47°, that is, the second angle G2 is any value within the range of 43° to 47° (i.e., G2 ∈ [43°, 47°]).

[0322] In some embodiments, as shown in FIG. 25, when the door body 20 is in the closed state, there is a third gap μ1 between the first shaft 421 and the end wall of the first trajectory groove 433 away from the door side wall 21. There is a fourth gap μ2 between the second shaft 422 and the end wall of the second trajectory groove 434 away from the door side wall 21 and close to the door front wall 22.

[0323] By providing a third gap μ1 between the first shaft 421 and the end wall of the first trajectory groove 433 away from the door side wall 21, and providing a fourth gap μ2 between the second shaft 422 and the end wall of the second trajectory groove 434 away from the door side wall 21 and close to the door front wall 22, when the user closes the door body 20 with a relatively large force, it is possible to prevent the door body 20 from being bounced in the direction away from the box body 10.

[0324] Note that there is a door seal on the side of the door body 20 close to the box body 10, and the door seal is a magnetic elastomer. Generally, when the door body 20 is closed, the door front wall 22 is located in the third reference plane M3.

[0325] As shown in FIGS. 26 and 27, when the door body 20 is pushed and closed with a relatively large force, the door body 20 continues to move from the closed state along the closing direction to the first set angle and presses the door seal, so that the door front wall 22 is located on the side of the box body 10 close to the third reference plane M3, and a second set angle δ is formed between the door front wall 22 and the third reference plane M3.

[0326] For example, 0° < the second set angle δ ≤ 3° (for example, the third set angle δ is 3°, 2° or 1°). That is, when the first shaft 421 is in contact with the end wall of the first trajectory groove 433 away from the door side wall 21, the second set angle δ between the door front wall 22 and the third reference plane M3 is any value within the range of 0° to 3°.

[0327] In addition, when the first shaft 421 is in contact with the end wall away from the door side wall 21 of the first track groove 433, the second shaft 422 and the end wall away from the door side wall 21 of the second track groove 434 may be provided so as to be in contact or have a gap.

[0328] In some embodiments, as shown in FIG. 27, the first locus line S further has a holding positioning point P' located on the side away from the door side wall 21 of the initial positioning point P0. While the door body 20 moves from the closed state along the closing direction by a first set angle, the positioning center point P moves from the initial positioning point P0 to the holding positioning point P'.

[0329] The locus segment between the holding positioning point P' and the initial positioning point P0 is defined as the holding locus segment P'P0, and the first holding locus segment P'P0 is located on the straight line where the straight locus segment is located.

[0330] In some embodiments, as shown in FIG. 27, the second locus line K has a holding guide point Q'. During the process in which the door body 20 moves from the closed state along the closing direction by a first set angle, the guide center point Q moves from the guide initial point Q0 to the holding guide point Q'.

[0331] The locus segment between the holding guide point Q' and the initial guide point Q0 is defined as the holding locus segment Q'Q0, and the tendency of the holding locus segment Q'Q0 coincides with the tendency of the second locus line K.

[0332] When the door body 20 is pressed and closed by a relatively large force, the first shaft 421 first moves to the initial positioning point P0, and the second shaft 422 first moves to the initial guide point Q0. Then, the positioning center point P continues to move from the initial positioning point P0 to the holding positioning point P' along the first locus line S, and the guide center point Q continues to move from the initial guide point Q0 to the holding guide point Q'. In this case, the door body 20 continues to rotate by a first set angle G' (0° < G' ≤ δ) in the direction approaching the box body 10, thereby preventing the door body 20 from being bounced in the direction away from the box body 10 when the user closes the door body 20 with a relatively large force.

[0333] In some embodiments, as shown in FIG. 14H, when the door body 20 is opened to the seventh angle G7, the positioning center point P moves to the end points close to the door side wall 21 and the door front wall 22 of the first locus line S. There is a fifth gap μ3 between the first shaft 421 and the end wall close to the door side wall 21 and the door front wall 22 of the first locus groove 433. In this case, the second shaft 422 moves to the middle of the second locus groove 434. With such an arrangement, it is possible to prevent the movement interference between the first shaft 421 and the first locus groove 433 due to manufacturing, assembly errors, or slight deformation.

[0334] It should be understood by those skilled in the art that the disclosure scope of the present disclosure is not limited to the technical solutions consisting of specific combinations of the above technical features, and other technical solutions formed by the above technical features or any combination equivalent thereto without departing from the spirit thereof should also be included. The scope of the present disclosure is defined by the scope of the claims.

Claims

1. Comprising a box body, a cooling device, a door body, a hinge assembly, a mounting block, and a position limiting part, The box body includes an inner container, a housing, and a heat insulation layer. A storage chamber is defined inside the box body, and the storage chamber includes a refrigerating chamber and a freezing chamber arranged along the height direction. The cooling device is configured to supply cold air to the storage chamber. The door body is configured to open and close the storage chamber. The door body includes a door side wall and a door front wall. The door side wall is the side wall of the door body close to the hinge assembly, and the door front wall is the side wall away from the box body when the door body is closed. The hinge assembly is configured to connect the door body and the box body. The hinge assembly includes a first hinge assembly and a second hinge assembly respectively provided at the upper and lower parts of the box body. The first hinge assembly and the second hinge assembly are respectively connected to the door body and the box body. The first hinge assembly includes a first hinge plate, a first biaxial assembly, a first track groove, and a second track groove. The first hinge plate includes a first connection part and a first extending part connected to the first connection part. The first connection part is connected to the upper end of the box body. The first biaxial assembly includes a first axis and a second axis. Both the first axis and the second axis are formed on the first extending part. The first axis is the main axis, and the second axis is the auxiliary axis. The first track groove and the second track groove are formed in a first end cover provided at the upper end of the door body and are close to one side surface of the first hinge plate. During the rotation process of the door body, the first axis moves in the first track groove, and the second axis moves in the second track groove. The positioning center point of the first axis moves along the first track line in the first track groove, and the guiding center point of the second axis moves along the second track line in the second track groove. Both the first axis and the second axis are cylindrical. The positive projection of the central axis of the first axis in the first track groove is used as the positioning center point, and the positive projection of the central axis of the second axis in the second track groove is used as the guiding center point. When the door body is closed, the positioning center point of the first axis is located at the initial positioning point of the first track line. The initial positioning point is located on the side away from the door side wall of the angular bisecting plane. The angular bisecting plane formed by the door front wall and the door side wall is used as the angular bisecting plane. When the opening angle of the door body is 0°, the door body is in a closed state, the positioning center point is located at the initial positioning point of the first trajectory line, and the guide center point is located at the initial guide point of the second trajectory line. During the process of the door body opening, the positioning center point extends from the initial positioning point to the seventh positioning point on the first trajectory line, and the seventh positioning point is the other end of the first trajectory line. The guide center point extends from the initial guide point to the ninth guide point on the second trajectory line. The second hinge assembly includes a second hinge plate, a second biaxial assembly, a third trajectory groove, and a fourth trajectory groove. The second hinge plate includes a second connecting portion, a second extending portion connected to the second connecting portion, and a stopper portion formed on one side of the second extending portion. The second connecting portion is fixedly connected to the box body by a fastener. The stopper portion extends in a direction away from the second extending portion from the one side of the second extending portion. A second gap is defined between the stopper portion and the second connecting portion. The second biaxial assembly includes a third axis and a fourth axis, and both the third axis and the fourth axis are formed on the second extending portion. The mounting block is provided in the accommodation groove at the lower end of the door body. The mounting block includes a plate body, a protruding portion, and a locking hook formed on the plate body. The plate body extends downward to form the protruding portion. The third trajectory groove and the fourth trajectory groove are defined in the protruding portion. The plate body and the protruding portion are integrally formed. The free end of the locking hook extends in a direction away from the plate body and bends in a direction approaching the plate body, thereby forming an opening facing the plate body. When the door body is in the closed state, the stopper portion is located in the opening, and the free end of the locking hook is located in the second gap. During the process from the door body being closed to being opened, the locking hook is deformed by receiving a force, so that the locking hook is disengaged from the fitting with the stopper portion. The position limiting portion includes a fitting portion and a position limiting bar, and the position limiting portion is a sheet metal member. The fitting portion is plate-shaped and is fixedly attached to the accommodation groove by being sandwiched between the mounting block and the inner wall of the accommodation groove. The position limiting bar is connected to the fitting portion and integrally formed, and extends along the width direction of the door body. The second hinge plate further includes a position limiting groove, and the position limiting groove is located on the door side wall and the side close to the door front wall of the second extending portion. When the door body rotates to the maximum angle, the position limiting bar abuts against the position limiting groove to prevent the door body from continuing to rotate. When the door body is opened to the seventh angle, the positioning center point moves to the end points close to the door side wall and the door front wall of the first locus line. There is a fifth gap between the first axis and the end wall close to the door side wall and the door front wall of the first locus groove, and the second axis moves to the middle of the second locus groove. Refrigerator.

2. The seventh angle is any value within the range of 63° to 67°. The refrigerator according to claim 1.

3. When the door body is closed, the door front wall is located in the third reference plane. When the door body is in the closed state, there is a third gap between the first axis and the end wall away from the door side wall of the first locus groove, and there is a fourth gap between the second axis and the end wall away from the door side wall of the second locus groove and close to the door front wall. When the door body is pushed and closed with a relatively large force, the door body continues to move from the closed state along the closing direction to the first set angle and presses the door seal, so that the door front wall is located on the side close to the box body of the third reference plane, and a second set angle is formed between the door front wall and the third reference plane. The refrigerator according to claim 1 or 2.

4. Taking the plane where the side surface of the box body close to the hinge assembly is located as the reference plane. When the door body is in the closed position, the door front wall is substantially perpendicular to the reference plane, and the distance between the positioning center point and the reference plane is the first set distance. When the door body is opened to 90°, the door front wall is substantially parallel to the reference plane, and the distance between the positioning center point and the door front wall is the second set distance. The difference between the first set distance and the second set distance is 0 mm or more and 1 mm or less. The refrigerator according to claim 3.

5. Taking the side edge formed by the intersection of the door front wall and the door side wall as the first side edge, and taking the side close to the box body of the reference plane as the inner side. In the process of the door body opening from the closed state, the first shaft moves in a direction approaching the door side wall along the first track groove, and the second shaft moves in a direction approaching the door side wall and away from the front wall of the door along the second track groove, so that the door body moves to the inside of the reference plane while rotating, and the distance that the first side edge of the door body exceeds the reference plane is less than 5 mm. The refrigerator according to claim 4.

6. In the process of the door body opening from the closed state to the maximum angle, the positioning central axis of the first shaft moves in one direction in a direction approaching the door side wall with respect to the first track groove of the door body, so that the door body moves laterally to the inside. In the process of the door body opening from the closed state to the seventh angle, the door body always maintains a tendency to move to the inside, and the distance that the door body moves to the inside is defined as the first distance. When the door body opens from the seventh angle to the maximum angle, the distance that the door body moves to the outside is defined as the second distance. The refrigerator according to claim 5.

7. The first distance is greater than the second distance. The refrigerator according to claim 6.

8. When the first shaft is in contact with the end wall away from the door side wall of the first track groove, the second set angle between the front wall of the door and the third reference plane is greater than 0° and not more than 3°. The refrigerator according to claim 3.

9. Comprising a box body, a door body, and a position limiting part. A storage chamber is defined inside the box body, and the storage chamber includes a refrigerating chamber and a freezing chamber arranged along the height direction. The door body is configured to open and close the storage chamber, and the door body includes a left side wall, a right side wall, an upper side wall, a lower side wall, a front wall of the door, and a rear wall of the door. Among the left side wall and the right side wall of the door body, the side wall closer to the hinge assembly is defined as the door side wall. The front wall of the door is the side wall away from the box body when the door body is closed, and the rear wall of the door is the side wall close to the box body when the door body is closed. The front wall of the door and the door side wall intersect to form a first side edge, and the door side wall and the rear wall of the door intersect to form a second side edge. The hinge assembly is a first hinge assembly or a second hinge assembly. The first hinge assembly is provided at the upper part of the box body and is fixedly connected to the box body and the door body respectively. The second hinge assembly is provided at the lower part of the box body and is fixedly connected to the box body and the door body respectively. The first hinge assembly and the second hinge assembly are provided along the same axis, so that the door body rotates around the axis, and the opening and closing of the door body are realized. The first hinge assembly includes a first hinge plate, a first biaxial assembly, a first track groove, and a second track groove. The first hinge plate includes a first connection portion and a first extending portion connected to the first connection portion. The first biaxial assembly includes a first axis and a second axis. Both the first axis and the second axis are arranged on the first extending portion. The first axis is the main axis, and the second axis is the auxiliary axis. The first hinge assembly further includes a first mounting block having a first plate body and a first protrusion. The first plate body extends downward to form the first protrusion. The first track groove and the second track groove are defined within the first protrusion. The second hinge assembly includes a second hinge plate, a second biaxial assembly, a third track groove, and a fourth track groove. The second hinge plate includes a second connection portion and a second extending portion connected to the second connection portion. The second extending portion extends in a direction away from the box body along the second connection portion. The second connection portion is fixedly connected to the box body by a fastener. The second biaxial assembly includes a third axis and a fourth axis. Both the third axis and the fourth axis are provided on the second extending portion and extend upward from the upper surface of the second extending portion. The third axis is inserted into and fitted with the third track groove. The fourth axis is inserted into and fitted with the fourth track groove. The second hinge assembly further includes a second mounting block. The second mounting block has a second plate body and a second protrusion. The second plate body extends upward to form the second protrusion. The third track groove and the fourth track groove are defined within the second protrusion. The door body further includes a second end cap provided at the lower end of the door body and corresponding to the position of the second hinge assembly. The second end cap includes a second receiving groove that opens downward. The second mounting block is fitted into the second receiving groove. The second hinge plate further includes a first fitting portion. The second mounting block further includes a second fitting portion that fits with the first fitting portion. When the door body is closed, the first fitting portion fits with the second fitting portion. When the door body is opened, the first fitting portion is released from the lock with the second fitting portion. The second fitting portion is configured as a locking hook. The locking hook is provided on one side of the second plate body. The fixed end of the locking hook is fixedly connected to the second plate body. The free end of the locking hook extends in a direction away from the second plate body and bends in a direction approaching the second plate body, thereby forming an opening towards the second plate body. The free end of the locking hook is closer to the box body than the fixed end. The first fitting portion is configured as a stopper portion. The stopper portion is provided on one side of the second extending portion. The stopper portion extends in a direction away from the second extending portion from the one side of the second extending portion. A second gap is defined between the stopper portion and the second connecting portion. When the door body is in the closed state, the stopper portion is located within the opening, and the free end of the locking hook is located within the second gap and abuts against the side of the stopper portion closer to the box body. During the process of the door body opening, the locking hook is deformed by receiving a force, thereby overcoming the stopper of the stopper portion and disengaging the locking hook from the fitting with the stopper portion. The locking hook includes a third extending portion and a bending portion. The third extending portion is connected to one side of the second plate body and is integrally formed with the second plate body. One end of the bending portion is fixedly connected to the one end of the third extending portion away from the second plate body. The other end of the bending portion extends in a direction away from the second plate body and bends in a direction approaching the second plate body. The third extending portion is fixedly connected to the second end cover provided at the lower end of the door body by a fastener. During the process of the door body rotating, the first shaft moves within the first track groove, and the second shaft moves within the second track groove. The position limiting portion includes a fitting portion and a position limiting bar. The position limiting portion is a sheet metal member. The position limiting bar is integrally formed with the fitting portion. The position limiting bar extends along the width direction of the door body. The fitting portion is plate-shaped and is fitted into the second receiving groove. The position limiting portion is fixedly attached to the second receiving groove by being sandwiched between the second mounting block and the inner wall of the second receiving groove. The second hinge plate further includes a position limiting groove. The position limiting groove is located on the side close to the door side wall and the door front wall of the second extending portion and penetrates the second extending portion along the thickness direction of the second extending portion. When the door body rotates to the maximum angle, the position limiting bar abuts against the position limiting groove to prevent the door body from continuing to rotate. Both the first shaft and the second shaft are cylindrical. Taking the orthographic projection of the central axis of the first shaft in the first locus groove as the positioning center point, and the orthographic projection of the central axis of the second shaft in the second locus groove as the guide center point. When the door body is opened to different angles, the positioning center point moves along the first locus line, and the guide center point moves along the second locus line. When the opening angle of the door body is 0°, the door body is in the closed state. The positioning center point is located at the initial positioning point of the first locus line, and the guide center point is located at the initial guide point of the second locus line. Taking the angular bisecting plane formed by the front wall of the door and the side wall of the door as the angular bisecting plane, and the point on the side of the angular bisecting plane away from the side wall of the door as the third set position. When the door body is closed, the initial positioning point is located at the third set position. During the process of the door body opening, the first locus line extends from the initial positioning point in a direction approaching the side wall of the door, and then extends to the seventh positioning point with a certain radian in a direction approaching the side wall of the door and the front wall of the door. The seventh positioning point is the other end of the first locus line. The second locus line includes an initial guide point and a ninth guide point that extends from the initial guide point in a direction approaching the side wall of the door and away from the front wall of the door. When the door body is opened to the first angle, the positioning center point is located at the first positioning point of the first locus line. The first positioning point is closer to the side wall of the door than the initial positioning point. The guide center point is located at the first guide point of the second locus line. The first guide point is closer to the side wall of the door and away from the front wall of the door than the initial guide point. When the door body is opened to the second angle, the door body rotates and opens to the second angle, and the lock hook is released from the lock with the stopper portion. During the process of the door body opening from an arbitrary angle greater than the closed state to an arbitrary angle smaller than the second angle, the movement tendency of the guide center point and the positioning center point does not change. In the process of the door body opening from an arbitrary angle greater than the second angle to an arbitrary angle less than the seventh angle, the positioning center point of the first axis moves along the curved trajectory segment of the first trajectory line in a direction approaching the door side wall and the door front wall, and the guide center point of the second axis moves along the second trajectory line in a direction approaching the door side wall and away from the door front wall. When the door body is opened to the seventh angle, the positioning center point is located at the seventh positioning point on the first trajectory line, and the guide center point is located at the seventh guide point on the second trajectory line, where the first angle < the second angle < the seventh angle < the eighth angle = 90°. Refrigerator.

10. The second angle is 13° or more and 17° or less. The refrigerator according to claim 9.

11. The seventh angle is an arbitrary value within the range of 63° to 67°. The refrigerator according to claim 9 or 10.

12. When the door body is opened to the seventh angle, the positioning center point of the first axis moves to the seventh positioning point on the first trajectory line close to the door side wall and the door front wall, and there is a fifth gap between the first axis and the end wall of the first trajectory groove close to the door side wall and the door front wall. The refrigerator according to claim 9 or 10.

13. When the door body is closed, the door front wall is located in the third reference plane. When the door body continues to rotate when it is in the closed state and presses the door seal, the door front wall moves to the side close to the box body of the third reference plane, and the included angle between the door front wall and the third reference plane is δ, and δ < 0°. The refrigerator according to claim 9 or 10.

14. When the door body is closed, there is a fourth gap between the second axis and the end wall of the second trajectory groove away from the door side wall with which it is fitted. The refrigerator according to claim 13.

15. When the door body is closed, there is a third gap between the first axis and the end wall of the first trajectory groove away from the door side wall. And / or there is a fourth gap between the second axis and the end wall of the second trajectory groove away from the door side wall and close to the door front wall. The refrigerator according to claim 13.

16. When the first axis is in contact with the end wall of the first trajectory groove away from the door side wall, the second set angle between the door front wall and the third reference plane is greater than 0° and 3° or less. The refrigerator according to claim 13.

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