Hinge structure and refrigerator

Abstract

The invention relates to the technical field of refrigerators, and discloses a hinge structure and a refrigerator, the hinge structure comprises a first hinge piece and a second hinge piece, the first hinge piece is provided with a first groove body and a second groove body, the second hinge piece is fixedly provided with a first shaft body and a second shaft body, the first shaft body is inserted into the first groove body, and the second shaft body is inserted into the second groove body. The first groove part of the first groove body and the fourth groove part of the second groove body extend towards the junction surface of the box and the door, so that when the first shaft body and the second shaft body move in the corresponding groove bodies, the door body can move far away from the box body at the first stage, the door-box distance in the door closing state can be reduced while opening and closing of the door body are not affected, and the door closing efficiency is improved. And even zero spacing can be realized. And for a door body provided with a door seal, the problem that the door seal structure is influenced is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a hinge structure and a refrigerator. Background Art

[0002] In order to prevent the side of the door from interfering with the box body when the door box is opened and closed, the existing refrigerator and hinge technology have to increase the distance between the door and the box, which will affect the heat conduction inside and outside the box of refrigerator products and increase power consumption. Even so, when the door seal is installed on the door body, the opening and closing of the conventional hinge still has the possibility of the door seal being squeezed and deformed laterally, affecting the sealing effect. (Lateral squeezing and deformation of the door seal: During the opening and closing process of the door body, the door seal interferes with the box body until it is deformed and fits, so that the door seal cannot achieve the actual sealing design effect, and there is also the risk of cold leakage).

[0003] SUMMARY OF THE INVENTION

[0004] The technical problem solved by the present invention is that the distance between the box and the door connected by the existing hinge structure is relatively large, and there is a possibility that the door seal is squeezed and deformed laterally, which affects the sealing effect.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A hinge structure, comprising:

[0007] A first hinged member, wherein the first hinged member is provided with a first slot body and a second slot body, wherein the first slot body comprises a first slot portion and a second slot portion which are connected, and the second slot body comprises a fourth slot portion and a fifth slot portion which are connected, wherein the first slot portion and the fourth slot portion extend from a starting end toward a mating surface of the box body and the door body in a closed state, and an angle between tangents of the center lines of the second slot portion and the fifth slot portion gradually increases;

[0008] A second hinge, on which a first shaft and a second shaft are fixedly disposed, the first shaft is inserted into the first slot, and the second shaft is inserted into the second slot;

[0009] The first hinge and the second hinge switch between an initial position and an open position. In the initial position, the first shaft is located at an end of the first groove away from the second groove, and the second shaft is located at an end of the fourth groove away from the fifth groove. Between the initial position and the open position, the first shaft moves in the first groove, and the second shaft moves in the second groove.

[0010] In one embodiment of the present invention, a first transition portion is provided between the first groove portion and the second groove portion, and between the fourth groove portion and the fifth groove portion.

[0011] In one embodiment of the present invention: a guide slope is provided on the first hinge, and the angle between the guide slope and the opening and closing direction of the inner wall of the door body is an acute angle; a thrust piece is fixedly provided on the second hinge, and when the door is closed, the thrust piece contacts and cooperates with the guide slope.

[0012] In one embodiment of the present invention, the thrust member is a cam structure, a piston structure or a shaft structure.

[0013] In one embodiment of the present invention, the thrust member is a third shaft body, and the guide slope is a side wall of a third groove body.

[0014] In one embodiment of the present invention, the distance ratio between the first axis, the second axis and the reference plane 3 is between 1:1.8 and 1:3.3, and the distance ratio between the first axis, the second axis and the reference plane 2 is between 1:1.47 and 1:1.6.

[0015] In one embodiment of the present invention, the ratio of the straight-line distances between the first axis, the third axis and the reference plane 2 is between 1:1 and 1:2.8; and the spacing between the first axis and the third axis in the y-axis direction is 25 mm or more.

[0016] In one embodiment of the present invention, the angle between the initial movement direction of the first shaft body and the second shaft body and the side wall of the box body is between 0° and 25°, the difference is between 0° and 10°, and the angle of the first shaft body is greater than the angle of the second shaft body.

[0017] In one embodiment of the present invention, the tangent direction angle between the center lines of the second groove portion and the fifth groove portion is greater than 20°.

[0018] A refrigerator comprises a box body and a door body, wherein the box body and the door body are rotatably connected via the hinge structure.

[0019] Beneficial effects of the present invention:

[0020] The hinge structure in the present application includes a first slot body and a second slot body, and the first slot portion of the first slot body and the fourth slot portion of the second slot body extend toward the direction of the box-door joint surface, so that during the movement of the first shaft body and the second shaft body in the corresponding slot body, the door body can first move away from the box body in the first stage, and the distance between the door and the box in the closed state can be reduced without affecting the opening and closing of the door body, and even zero distance can be achieved. And for the door body provided with a door seal, there will be no problem of affecting the door seal structure.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a refrigerator device of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of the closed door state and the coordination of the environmental structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the instantaneous force on the door when the door is opened in the closed state of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the hinge structure of the present invention;

[0027] Figure 5 is a schematic structural diagram of the first hinge of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the force applied to the door body of the present invention during the first stage of opening;

[0029] Figure 7 It is a structural schematic diagram of the first stage of opening the door body of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the vector components of the first stage trajectory of point b of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the second stage of the opening and closing of the door body of the present invention, and the movement tracks of points a and b in the whole opening and closing process are attached in the figure;

[0032] Fig.10 It is a structural schematic diagram of the door body of the present invention when it is opened and closed to 90°;

[0033] Fig.11 It is a structural schematic diagram of the third stage of the door body opening process of the present invention;

[0034] Fig.12 It is a structural schematic diagram of the relationship between the maximum opening angle of the door body of the present invention and the coordination of the environmental structure;

[0035] Fig.13 It is a schematic diagram of the motion trajectory of point a and point b in the entire opening and closing process;

[0036] Fig.14 It is a curve diagram of the angle between the movement direction of the shaft body and the reference surface 1 during the entire opening and closing process of the present invention;

[0037] Fig.15 It is a curve diagram of the angle between the movement direction of the shaft body and the reference surface 2 during the entire opening and closing process of the present invention;

[0038] Fig.16 It is a curve diagram of the angle between the motion trajectory of point a and the reference surface 2 during the entire opening and closing process of the present invention;

[0039] Fig.17 It is a curve diagram of the angle between the axis movement direction and the reference surface 1 in the first stage of the door opening of the present invention;

[0040] Fig.18 It is a curve diagram of the angle between the axis movement direction and the reference surface 2 in the first stage of the door opening of the present invention;

[0041] Fig.19 It is a curve diagram of the angle between the axis movement direction and the reference surface 1 in the second stage of the door opening of the present invention;

[0042] Fig. 20 It is a curve diagram of the angle between the axis movement direction and the reference surface 2 in the second stage of the door opening of the present invention;

[0043] Fig.21 It is a curve diagram of the angle between the axis movement direction and the reference surface 1 in the third stage of the door opening of the present invention;

[0044] Fig. 22 It is a curve diagram of the angle between the axis movement direction and the reference plane 2 in the third stage of door opening of the present invention.

[0045] The reference numerals in the figure are:

[0046] 10. Box body; 20. Door body; 30. First slot body; 40. Second slot body; 50. Third slot body; 60. First shaft body; 70. Second shaft body; 80. Third shaft body;

[0047] 31. first groove portion; 32. second groove portion; 33. third groove portion;

[0048] 41. Fourth groove portion; 42. Fifth groove portion; 43. Sixth groove portion. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] See also Figure 1-22 The present application discloses a refrigeration device. The refrigeration device provided in the embodiments of the present application includes low-temperature storage devices such as refrigerators, freezers, and ice bars. Of course, the refrigeration device can also be other devices with a box body and a door assembly, and the door assembly is required to be able to rotate relative to the box body. The following description of the refrigeration device in the embodiments of the present application is explained by taking a refrigerator as an example. This example is only for discussion purposes and does not limit the specific form of the refrigeration device.

[0053] When the door body is installed to a fixed cabinet or door frame through a hinge assembly, the door body may interfere with the cabinet or door frame during movement. Therefore, in order to prevent the side of the door body from interfering with the cabinet when the door box is opened and closed, the existing refrigerator and hinge technology have to increase the distance between the door and the cabinet, which will then affect the heat conduction inside and outside the cabinet of refrigerator products and increase power consumption. Even so, when a door seal is installed on the door body, the opening and closing of conventional hinges may still cause the door seal to be squeezed and deformed laterally, affecting the sealing effect. (Lateral squeezing and deformation of the door seal means that during the opening and closing of the door body, the door seal interferes with the cabinet until it is deformed and fits, which negatively affects the performance of the door seal and fails to achieve the actual sealing design effect. There is also the risk of cold leakage).

[0054] To solve the above problems, please refer to Figure 1-22 The present application provides a hinge assembly with a special trajectory and capable of realizing a change in the distance between door boxes, so that at the moment of opening or closing the door body, the side edges of the door body do not rotate or rotate very little, so that the side edges of the door body close to the box body will not move in the direction close to the box body, thereby changing the overall operation trajectory of the door body, effectively reducing the distance between door boxes (achieving zero distance), improving the sealing effect, and reducing the power consumption of the refrigerator.

[0055] Before describing the hinge assembly of the embodiment of the present invention, the application scenario of the hinge assembly of the embodiment of the present invention is described, but the application scenario of the hinge assembly of the embodiment of the present invention is not limited to the listed application scenarios.

[0056] refer to Figures 1 to 13 As shown, the hinge assembly of the embodiment of the present invention can be applied to a door body 20 connected to the box body 10 and can be opened and closed, and the user can directly observe the front side of the door body 20; it can also be applied to the door body 20 of a refrigerator-like refrigeration device installed in an embedded (flush) manner, and the front side of the door body 20 is flush with the front wall of the environmental structure. In the case of an embedded door body, it is necessary to ensure that the side edges of the door body 20 will not interfere with the environmental structure, and to ensure the opening and closing angle of the door body 20.

[0057] See also Figure 2 , wherein the environmental structure can be understood as a wall, a cabinet, an electrical appliance, etc. The side edge of the door body 20 (hereinafter referred to as the first side edge, i.e., point a) can be understood as being located at the connection between the front side of the door body 20 and the first side wall (the left side wall or the right side wall of the door body 20, the right side wall in the figure), the front side and the first side wall are located at adjacent sides of the door body 20, the first side wall is located at the hinge side of the door body 20, the hinge assembly is installed at the hinge side of the door body 20, the opening and closing side of the door body 20 is arranged opposite to the hinge side in the left and right directions, and at the opening and closing side, the front side of the door body 20 is connected to the second side wall, and the second side wall is arranged opposite to the first side wall in the left and right directions. Among them, the user usually grasps the door body 20 at the opening and closing side to open and close the door body 20. Regarding the first side edge: when the front side of the door body 20 intersects with the first side wall, the intersection is the first side edge; when a chamfered area is provided between the front side of the door body 20 and the first side wall, any straight line extending along the height direction of the chamfered area can be understood as the first side edge, and the first side edge is not limited to a fixed edge line, and the first side edge can be switched among multiple vertical lines between the front side of the door body 20 and the first side wall. The second side edge (point b) of the door body 20 is located at the connection between the first side wall of the door body 20 and the rear side (the side of the door body 20 corresponding to the fitting of the box body 10).

[0058] See also Figure 2-12A hinge assembly includes a first hinge and a second hinge, wherein the first hinge is provided with a first slot 30 and a second slot 40, and the second hinge is fixedly provided with a first shaft 60 and a second shaft 70, wherein the first shaft 60 is inserted in the first slot 30, and the second shaft 70 is inserted in the second slot 40. The first hinge and the second hinge are provided with a double-shaft double-slot matching structure, wherein the first shaft 60 moves in the first slot 30, and the second shaft 70 moves in the second slot 40, so as to drive the first hinge and the second hinge to open or close relative to each other, and when one of the first hinge and the second hinge is installed on the door body 20, and the other is installed on the box body 10 or the door frame, the door body 20 can be opened and closed.

[0059] See also Figure 2-12 In the following embodiments, one of the first hinge and the second hinge is provided on the door body 20, and the other is provided on the box body 10. The box body 10 is provided with an opening on the front side, and the door body 20 switches between the opening state of the box body 10 and the closing state. One of the first hinge or the second hinge is provided on the hinge side of the door body 20 (or the box body 10), which can be understood as the first hinge or the second hinge being integrally formed with the door body 20 (or the box body 10), or the first hinge or the second hinge being an independent part and fixedly mounted on the door body 20 (or the box body 10).

[0060] See also Figure 2-12, the first slot body 30 includes a first slot portion 31, a second slot portion 32 and a third slot portion 33 connected to each other, and the second slot body 40 includes a fourth slot portion 41, a fifth slot portion 42 and a sixth slot portion 43 connected to each other. The first slot portion 31 and the fourth slot portion 41 extend from the starting end to the matching surface (reference surface 1) of the box body 10 and the door body 20 in the closed state. The angle of the tangent of the center line of the second slot portion 32 and the fifth slot portion 42 gradually increases to ensure that the door body 20 is opened as soon as possible relative to the box body 10. The third slot portion 33 and the sixth slot portion 43 are slot structures with the same center and different radii. When the first shaft body 60 is in the first slot portion 31, the second shaft body 70 is located in the fourth slot portion 41. At this time, the first shaft body 60 and the second shaft body 70 can move relative to the slot structure in the direction close to the reference surface 1. When the first shaft body 60 is located in the second slot portion 32 and moves, the second shaft body 70 is located in the fifth slot portion 42. When the first shaft body 60 moves in the third groove portion 33, the second shaft body 70 is located in the sixth groove portion 43. The sixth groove portion 43 corresponds to the second shaft body 70, and the third groove portion 33 is an arc-shaped structure extending along the center of the sixth groove portion 43. The second groove portion 32 is provided at the terminal end of the first groove portion 31, so that the first shaft body 60 can move from the first groove portion 31 to the second groove portion 32, and the fifth groove portion 42 is provided at the terminal end of the fourth groove portion 41, so that the second shaft body 70 can move from the fourth groove portion 41 to the fifth groove portion 42.

[0061] See also Figure 2-12 , the first hinge and the second hinge switch between an initial position and an open position, in which the first shaft 60 is located at an end of the first slot 31 away from the second slot 32, and the second shaft 70 is located at an end of the fourth slot 41 away from the fifth slot 42; between the initial position and the open position, the first shaft 60 moves in the first slot 30, and the second shaft 70 moves in the second slot 40; in the open position, the first shaft 60 is located in the third slot 33 and the second shaft 70 is located in the sixth slot 43.

[0062] See also Figure 2-12, a first transition portion is provided between the first groove portion 31 and the second groove portion 32, and between the fourth groove portion 41 and the fifth groove portion 42, so that the first rotating shaft can smoothly enter the second groove portion 32 from the first groove portion 31, and at the same time, the second rotating shaft can smoothly enter the fifth groove portion 42 from the fourth groove portion 41. Similarly, a second transition portion is provided between the second groove portion 32 and the third groove portion 33, and between the fifth groove portion 42 and the sixth groove portion 43, respectively. By providing the transition portion, the entire door opening trajectory is smooth. The fifth groove portion 42 and the sixth groove portion 43 are arranged at an angle, and the inner side wall between the two is protruded outward to form a blocking portion, so as to ensure that when the first shaft body 60 is in the third groove portion 33, the second shaft body 70 can be positioned in the sixth groove portion 43, so that at this stage, the door body 20 performs a single-axis opening and closing action with the second shaft body 70. At the same time, the process of the second shaft 70 entering the sixth groove 43 from the fifth groove 42 and completing the positioning will cause the first hinge to move toward the opening side relative to the second hinge, reducing the distance that the first side edge moves outward during the door opening process, thereby avoiding the first side edge of the door body 20 from interfering with the adjacent environment.

[0063] See also Figure 2-12 In the initial stage of opening the door, the user usually grasps the door body 20 on the opening and closing side to open and close the door body 20. In the above-mentioned double-axis double-groove matching trajectory, initially, the movement direction of the first axis 60 and the second axis 70 relative to the groove body is roughly toward the matching surface of the box body 10 and the door body 20. At the moment of opening the door, there is a large deviation between the door opening force and the movement direction of the hinge structure, which may cause the door body 20 to jam during opening and closing. The existence of the matching clearance between the axis body and the groove body causes the door body 20 to produce a false motion center state at the second axis body 70 at the moment of opening and closing, which will further increase the possibility of jamming. Therefore, a guide bevel is provided on the first hinge, and the angle between the guide bevel and the opening and closing side direction of the inner wall of the door body 20 is an acute angle. A thrust piece is fixedly provided on the second hinge, and when the door is closed, the thrust piece contacts and cooperates with the guide bevel. In this way, at the moment of opening the door, no matter how the direction of the force acting on the door body 20 changes, through the cooperation of the thrust piece and the guide slope, there is always a component force in the negative direction of the y-axis, so that the movement of the hinged side of the door body 20 and the rotation of the door body are synchronized.

[0064] See also Figure 2-12 , the thrust piece can be realized by a cam, a piston (thrust rod), a shaft or other means. When the structural expression of the thrust piece changes, the guide slope adapts thereto. As an example, the thrust piece is a third shaft body 80, and the guide slope is embodied by a corresponding third groove body 50 provided on the second hinge. The distance ratio between the first shaft body 60, the third shaft body 80 and the reference plane 2 is between 1:1 and 1:2.8; the spacing between the first shaft body 60 and the third shaft body 80 in the y-axis direction is 25 mm or more.

[0065] Working principle of the present invention:

[0066] See also Figure 1-22 Below, the opening and closing process of the door body 20 is described with the first hinge fixedly arranged on the door body and the second hinge fixedly arranged on the box body 10, wherein the door body 20 can also be directly used as the first hinge. At this time, the first groove body 30 and the second groove body 40 are directly opened at the end positions of the door body 20.

[0067] See also Figure 2-22 In the closed state, the plane where the side surface of the box body 10 used to cooperate with the door body 20 is located is defined as reference plane 1, the plane where the side surface of the box body 10 perpendicular to the reference plane 1 is located is defined as reference plane 2, a plane parallel to the reference plane 1 and separated by a specified distance (the specified distance can be selected as the thickness t of the door body) is defined as reference plane 3, and a plane parallel to the reference plane 2 and separated by a specified distance is defined as reference plane 4. The reference plane 4 can be understood as a plane parallel to the side surface of the environmental structure and the box body 10, wherein a reference point e is set on the reference plane 4, which can be understood as the side edge position of the environmental structure. The distance between the reference plane 2 and the reference plane 4 is h, that is, the distance between the side wall of the box body 10 and the environmental structure. The hinge assembly is located between the reference plane 1 and the reference plane 3. In this embodiment, the plane where the front side surface of the door body 20 is located can be selected as the reference plane 3. In the top / bottom view, a coordinate system is established with the reference plane 1 as the x-axis and the reference plane 2 as the y-axis. At the same time, four points a, b, c, and d are set in four directions (the positions are as shown in FIG. Figure 3 As shown), in the closed state, ab coincides with reference plane 2, bc is parallel to reference plane 1, the vertical distance between point b and reference plane 1 is L1 (which is the distance between the door boxes in the closed state. In the closed state, the vertical distance L1 between point b and reference plane 1 is defined as s), and the vertical distance between point a and reference plane 2 is L2.

[0068] See also Figure 2-12, when the door is closed, that is, the first shaft body 60 is located at the starting end of the first slot body 30, and the second shaft body 70 is located at the starting end of the second slot body 40. At this time, the distance ratio between the first shaft body 60, the second shaft body 70 and the reference surface 3 is between 1:1.8 and 1:3.3 (in the flush embedded use environment, the outer side surface of the door body (reference surface 3) needs to be flush with the environmental structure. Therefore, in order to ensure that the front side surface of the door body does not interfere with the environmental structure during the opening and closing process, it is necessary to ensure that the distance between the first shaft body 60, the second shaft body 70 and the reference surface 3 is within the set range, and the numerical change of the thickness t of the door body 20 can only be reflected in the change of the parameters between the first shaft body 60, the second shaft body 70 and the reference surface 1); the distance ratio between the first shaft body 60, the second shaft body 70 and the reference surface 2 is between 1:1.47 and 1:1.6. The door body and the box body 10 are opened and closed by the connection of the hinge assembly. The opening and closing process is divided into three stages. The symbols Ⅰ, Ⅱ, and Ⅲ are used below to refer to the opening and closing process of the three stages. Furthermore, Ⅰ1 represents the movement direction of the first shaft body 60 in the first stage (the movement trend of the first shaft body 60 relative to the first slot body 30), and Ⅱ1 represents the movement direction of the first shaft body 60 in the second stage. (The illustrated case does not illustrate the movement of the shaft, but the movement of the shaft body relative to the slot body). ΔⅠ1 represents the reference angle difference of a certain section of the trajectory in this stage, and α represents the opening angle of the door body.

[0069] See also Figure 2-12 , the first stage, the first stage is the variable spacing stage, and the door opening angle in this stage is less than or equal to 5°. The user's door opening force F acts on the opening and closing side. Under the action of the reaction force, the third shaft body 80 applies a force F1 to the door body through the third groove body 50. The force F1 is along the normal direction of the contact point with the guide slope, and at least has a component in the negative direction of the y-axis (the direction away from the reference plane 1), so that the door body 20 will not be stuck at the moment of opening.

[0070] See also Figure 2-12 Then, the first shaft body 60 moves in the first groove 31, and the second shaft body 70 moves in the fourth groove 41. The initial movement direction points to the reference plane 1 or at least there is a movement component toward the reference plane 1. Therefore, the door body can move in the y-axis direction at this stage, so that the door body moves away from the box body 10 in the process of opening the door, thereby optimizing the opening and closing action of the door body 20, reducing the distance between the door and the box in the closed state, and the door body equipped with a door seal can also prevent the door seal and the box body 10 from being squeezed and deformed laterally.

[0071] See also Figure 2-12In the first stage, in the motion trajectory of the door body 20, point b is taken as the research point. When the door body is in the closed state, the position of point b is b0. In the process of point b moving from b0 to b1 through the cooperation of the hinge, the distance L1 of any point will only increase, not decrease, that is, L1≥door box spacing. Because the force does not act directly on the hinge during the opening of the door body, according to the human body's door opening method, under normal circumstances, the direction of force F will change along a curved trajectory. The direction of the initial force F should be perpendicular to the surface of the door body, or point to the fourth quadrant at an angle less than 45° (with the point of force of F as the origin, right as x positive, and top as y positive as the coordinate system). Therefore, to meet the condition of L1≥door box spacing, it is necessary to move the door in the negative direction of the y axis at the moment of opening the door, that is, the initial movement direction of point b points to the bottom of the reference surface 1.

[0072] To meet the above requirements, the initial movement directions Ⅰ1 and Ⅰ2 of the first shaft body 60 and the second shaft body 70 in the first stage should point to the upper left of the initial position (the second quadrant of the coordinate system), and Ⅰ3 should point to the first quadrant. From the initial position to the end of the first stage, the movement directions Ⅰ1 and Ⅰ2 of the first shaft body 60 and the second shaft body 70 should rotate clockwise from pointing to the second quadrant to pointing to the first quadrant. The angles of the initial movement directions Ⅰ1 and Ⅰ2 with the y-axis should be between 0° and 25°, and the angles Ⅰ1>Ⅰ2, with a difference between 0° and 10°. The angle of the initial movement direction Ⅰ3 is greater than 0.3 times (Ⅰ1+Ⅰ2) and less than 180°.

[0073] The legend uses a 2° opening angle as an explanation case. Point b1 is the position when the door is opened to 2°. The distance from b0 to b1 (b0b1 is its direction scale, not the actual trajectory of point b) is decomposed into two vector distances in the x direction and the y direction, namely bx and by, satisfying 0<by≤0.2bx, that is, the angle between b0b1 and reference surface 2 is 0<θ<30°. When the opening angle is 0-2°, the trajectory of point b is similar to linear motion. From the trajectory of point b, it can be seen that the center of the osculating circle of point b in stage 1 is always at the upper left of point b.

[0074] See also Figure 2-13, the center of the osculating circle of the point b trajectory in the second stage will change to the lower right, so in order to prevent the trajectory from being stuck, a transition stage is required, and the transition stage has at least a 1° opening and closing angle process. In the first transition stage, the first shaft body 60 moves from the first slot portion 31 to the second slot portion 32, and at the same time, the second shaft body 70 moves from the fourth slot portion 41 to the fifth slot portion 42. The legend uses 2°-9° as the transition process, the unit variable of the point b trajectory in the by direction gradually decreases, and the unit variable in the bx direction gradually increases, so as to smoothly combine the curve of the second stage and prevent stuck. In the transition stage, when the angle between the movement direction of the first shaft body 60 and the reference plane 1 decreases as a whole, there will be a sudden increase process (the angle between the extension line of the movement direction of the first shaft body 60 and the positive direction of the x-axis), which is the process in which the center of the osculating circle of the point b trajectory changes from the upper left to the lower right. At the end of the transition stage, the change in the angle of the movement direction of Ⅰ3 is greater than 0.5 times the sum of Ⅰ1, Ⅰ2 and the initial movement angle change (i.e., ΔⅠ3≥0.5(ΔⅠ1+ΔⅠ2)), and the angle of the movement direction of Ⅰ3 at the end of the transition stage is less than 180°. At this time, the angle between the movement direction of the second axis 70 and the reference surface 1 is 45° or less. If a door seal is installed on the inner side of the door body 20, the movement trajectory of the door seal will be similar to the movement trajectory of point b. After setting the distance (the distance between the box and the door in the closed state), since the door body 20 will first move away from the box body 10 in an approximately straight line, it will not interfere with or rub against the box body 10 during the opening and closing process.

[0075] See also Figure 2-13 After the first stage trajectory ends, it gradually transitions to the second stage trajectory. Since the trajectory after the first stage will no longer have a situation where the angle between the force and the movement direction is too large, at the end of the first stage, the third axis 80 is separated from the third groove 33, and the movement trajectory of the hinge structure is changed from three axes to two axes to reduce the friction consumption of the third axis 80. At the same time, the movement complexity of the hinge structure is reduced to ensure the smooth opening and closing of the door body 20.

[0076] See also Figure 2-13, the second stage trajectory begins, the angle between the initial movement direction of Ⅱ1 and the reference plane 2 is between 0-20°, the angle between the initial movement direction of Ⅱ2 and the reference plane 2 is between 20-45°, and the angle difference between Ⅱ1 and Ⅱ2 in the second stage is always greater than 20°. In this process, the angle change of Ⅱ1 and Ⅱ2 is first stable and then increases. The angle between the two also changes from being stable to gradually increasing, and finally becoming stable, indicating that this stage is over. Among them, in the process of the shaft body moving relative to the groove body in the groove body (that is, the process of one hinge moving relative to another hinge), the instantaneous movement direction of a certain point is consistent with the tangent of the center line of the groove body (the axis body movement trajectory line) at this point. In order to meet market changes and user application needs, at this stage, the distance that the position of point 20a of the door body exceeds the reference plane 2 should not be greater than h (as an example, h can be 3mm). Therefore, at this stage, the angle between the movement direction angle of the second shaft body 70 and the reference plane 1 should always be kept below 45°, so that the movement of the door body will always keep the distance that point a moves to the right less than 3mm.

[0077] See also Figure 2-13 As an example, after the door body 20 is opened 15°, the angle difference between Ⅱ1 and Ⅱ2 gradually increases to prevent the problem that when point a reaches the same horizontal line as the center of the trajectory osculating circle, the distance L2 is too large and exceeds h. In this example, the position of point a reaches above the center of the trajectory osculating circle at 55° (that is, L2 is the largest at this time), and then the distance L2 will gradually decrease. The angle difference between Ⅱ1 and Ⅱ2 will gradually stabilize, indicating that this stage is over. At the end of the second stage, the angle between the movement direction of Ⅱ2 and the reference plane 1 is between -45° and -55° (the negative sign indicates the direction), and the angle with the movement direction of the initial position of the third stage exceeds 90°.

[0078] See also Figure 2-13 After the second stage is over, the third stage is entered, which may include a second transition stage from the second stage to the third stage, in which the first shaft body 60 moves from the second groove portion 32 to the third groove portion 33, and the second shaft body 70 moves from the fifth groove portion 42 to the sixth groove portion 43. This process can complete the positioning of the second shaft body 70. As an example, the door body 20 completes the positioning of the second shaft body 70 at 66° to 80°. In the third stage, the second shaft body 70 moves from the beginning of the sixth groove portion 43 (the end close to the fifth groove portion 42) to the end of the sixth groove portion 43, which is represented on the movement trajectory of the door body as follows: the door body moves to the left side of the figure (i.e., the opening and closing side, in the figure as an example, the hinged side is on the right and the opening and closing side is on the left) to reduce the interference between the front side of the door body, the first side wall and the surrounding environment. After the second shaft 70 is positioned, the second shaft 70 is located at the end of the sixth groove 43, and the first shaft 60 is in the third groove 33, and the hinge track is transformed from a dual-axis motion to a quasi-uniaxial motion rotating around the second shaft 70. This process can reduce friction, reduce the structural failure rate, and improve the track smoothness.

[0079] See also Figure 2-13 The third stage is mainly to transition the trajectory to single-axis rotation. Therefore, the movement angle of the first shaft body 60 is basically stable, and the movement direction angle of the second shaft body 70 changes roughly linearly. In the third stage, due to the sixth groove portion 43 arranged at an angle with the fifth groove portion 42, when the door body 20 is opened and closed to about 80°, its hinged side can be displaced a distance in the direction away from the environmental structure, and then continue the single-axis opening and closing action, thereby avoiding interference with the environmental structure while increasing the opening and closing angle of the door body 20 relative to the box body 10 as much as possible.

[0080] See also Figure 2-13 , below, the movement trajectory of the door body 20 is explained by taking the first hinge connected to the door body 20 as an example, wherein the two side edges of the door body 20 that are prone to interference are respectively marked as the first side edge point a and the second side edge point b in the top view. Point a is prevented from interfering with the environmental structure and the box body 10 during movement, and point b is prevented from interfering with the box body 10. During the opening and closing process of the door body 20, no matter which hinge is used, there is a curvature circle in the non-straight line motion trajectory of the door body. Therefore, the motion trajectory of point b at any time can be regarded as a circular motion around a certain center of the circle, but due to the change of the trajectory, the center of the curvature circle will also change from time to time. During the opening and closing process of the door body 20 using the special hinge structure of the present application, the motion trajectories of points a and b and the change diagram of the center position of point b are roughly as shown below. Fig.13 shown.

[0081] See also Figure 2-13At the beginning of the first stage, the center of the osculating circle of the motion trajectory of point b is at the upper left of point b, so the initial motion direction of point b is downward or lower left. The opening angle is between 0-5°. This allows point b to quickly detach from the box 10, reducing the risk of friction and interference, and achieving an ultra-thin door box spacing in the closed state. When the door is closed, the initial position of point b is b0, and it reaches point b1 at the end of the first stage. The distance from b0 to b1 is decomposed into two vector distances in the x-direction and y-direction, namely bx and by, (b0b1 is its direction scale, not the actual trajectory of point b) satisfying 0<by≤0.2bx, that is, the angle between b0b1 and the reference surface 2 is 0<θ<30°. At the same time, the following parameters are also met at this stage: L2 = t*tanα-bx; bx ≥ t*tanα-h; L1 = by = (tanα*(90°-θ)*bx) / α+s; where L1 is the vertical distance between point b and reference plane 1; L2 is the vertical distance between point a and reference plane 2; α is the door opening angle; θ is the angle between the trajectory of point b and reference plane 2; t is the door thickness, h is the distance between the side wall of the box 10 and the environmental structure, and s is the vertical distance between point b and reference plane 1 when closed. Among them, due to the different compensation heights of the door seal, the distance by is adjusted differently according to the actual situation, and by is approximately equal to the compensation height of the door seal.

[0082] In the closed state, the distance between the second shaft body 70 and the reference surface 4 is D1, and the distance between the second shaft body 70 and the reference surface 3 is D2. When the door is opened 90°, the distance between the second shaft body 70 and the front side surface of the door body 20 (reference surface 2) is D3. During the opening and closing process of the door body 20, the straight line distance from the center of the second shaft body 70 to point a is A1, and the straight line distance to point e is B1. The maximum opening angle of the door body 20 satisfies αmax=90°+β, β is the opening angle value of the door body after opening 90°, and the angle β and D1, D2 meet the following settings: cosβ=1-((D1-D3) 2 / B1 2 ), among which, B1 2 =D1 2 +D2 2 ; That is, cosβ=1-((D1-D3) 2 / (D1 2 +D2 2 )). Wherein, 0≤D1-D3≤11; 32.5≤D1+D2≤48; β satisfies 0≤β≤50°. The positional relationship between the first shaft body 60 and the second shaft body 70 satisfies tanγ=(O1O3) / (O2O3), where 0.58<tanγ<0.63; 30°<γ<32°.

[0083] In the above three stages of the opening and closing movement trajectory of the door body 20 relative to the box body 10, the existence of the first stage trajectory is mainly used to make the door body 20 move away from the box body 10 at the moment of opening the door, the second stage is the angle expansion action of the door body 10, and the third stage is mainly used to enable the door body 20 to move toward the opening and closing side to reduce the risk of interference with the environmental structure, thereby expanding the maximum angle that the door body 20 can open. Therefore, in the above three stages, the first stage and the second stage can be implemented separately to achieve the purpose of reducing the distance between the door and the box. The second stage and the third stage can be implemented separately to solve the problem of interference between the door body 20 and the environmental structure and insufficient door opening angle. In addition, the entire opening scheme of the first stage, the second stage, and the third stage can be used as a whole, or they can be combined with existing related technologies to solve corresponding technical problems.

[0084] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A hinge structure, characterized in that: include: A first hinged member, wherein a first slot body and a second slot body are formed on the first hinged member, wherein the first slot body comprises a first slot portion and a second slot portion that are connected, and the second slot body comprises a fourth slot portion and a fifth slot portion that are connected, wherein the first slot portion and the fourth slot portion extend from a starting end toward a mating surface of the box body and the door body in a closed state, and an angle between tangents of the center lines of the second slot portion and the fifth slot portion gradually increases; A second hinge, on which a first shaft and a second shaft are fixedly disposed, the first shaft is inserted into the first slot, and the second shaft is inserted into the second slot; The first hinge and the second hinge switch between an initial position and an open position. In the initial position, the first shaft is located at an end of the first groove away from the second groove, and the second shaft is located at an end of the fourth groove away from the fifth groove. Between the initial position and the open position, the first shaft moves in the first groove, and the second shaft moves in the second groove.

2. A hinge structure according to claim 1, characterized in that: A first transition portion is disposed between the first groove portion and the second groove portion, and between the fourth groove portion and the fifth groove portion.

3. A hinge structure according to claim 1, characterized in that: The first hinge is provided with a guide slope, and the included angle between the guide slope and the inner wall of the door body in the opening and closing direction is an acute angle. The second hinge is fixedly provided with a thrust piece, and when the door is closed, the thrust piece contacts and cooperates with the guide slope.

4. A hinge structure according to claim 3, characterized in that: The thrust piece is a cam structure, a piston structure or a shaft structure.

5. A hinge structure according to claim 3, characterized in that: The thrust piece is the third shaft body, and the guiding inclined surface is the side wall of the third groove body.

6. A hinge structure according to claim 5, characterized in that: The distance ratio between the first axis, the second axis and the reference surface 3 is between 1:1.8 and 1:3.3, and the distance ratio between the first axis, the second axis and the reference surface 2 is between 1:1.47 and 1:1.

6.

7. A hinge structure according to claim 6, characterized in that: The ratio of the straight-line distances between the first axis, the third axis and the reference plane 2 is between 1:1 and 1:2.8; the spacing between the first axis and the third axis in the y-axis direction is 25 mm or more.

8. A hinge structure according to claim 1, characterized in that: The angle between the initial movement direction of the first shaft body and the second shaft body and the side wall of the box body is between 0° and 25°, the difference is between 0° and 10°, and the angle of the first shaft body is greater than the angle of the second shaft body.

9. A hinge structure according to claim 1, characterized in that: The included angle of the tangent direction of the center lines of the second groove portion and the fifth groove portion is greater than 20°.

10. A refrigerator, characterized in that: It comprises a box body and a door body, wherein the box body and the door body are rotatably connected via a hinge structure according to any one of claims 1 to 9.

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