A hinge assembly and a built-in refrigeration appliance

Abstract

The utility model discloses a hinge assembly and embedded refrigeration equipment belongs to refrigeration equipment field. Hinge assembly includes first hinge and second hinge, is seted up with first groove body and second groove body on the first hinge, and the first shaft body is inserted in the first groove body, and the second shaft body is inserted in the second groove body. First hinge and second hinge are set as the cooperation structure of double -shaft double -groove, and the special structure formed through double -shaft structure, double -groove structure makes the door body in the opening -closing process with specific track and moves, in the whole process of track line, the door body almost does not move to the direction of environmental structure and is located, guarantees the smooth opening and closing of door body under the condition that the embedded equipment peripheral space is limited, and because in the fourth stage of door body opening, the door body can move a certain distance to the opening -closing side direction, makes the door body can open the larger angle.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment, and in particular to a hinge assembly and an embedded refrigeration device. Background Technology

[0002] Refrigeration equipment is a type of device that removes heat from an object or space by consuming energy, thereby lowering its temperature and maintaining it at a low temperature. Its core principle is the continuous absorption and release of heat through the compression-condensation-throttling-evaporation cycle of a refrigerant (such as Freon). Common household and commercial equipment includes refrigerators, air conditioners, and freezers, which provide protection for food preservation and create a comfortable environment.

[0003] Door-type refrigeration equipment refers to refrigeration devices that form a closed, low-temperature space through a cabinet and door, the most common examples being refrigerators and freezers. Their core characteristics are concentrated storage space, good insulation, and easy access to items, primarily used for the refrigeration and freezing of food, medicine, and other goods. Based on door type and purpose, they can be divided into single-door and multi-door refrigerators, as well as upright and horizontal freezers, etc.

[0004] In today's era, with the popularity of built-in installations, more and more users are choosing built-in design styles. To ensure overall aesthetics and avoid potential safety hazards from items getting stuck in gaps, the gap between refrigeration equipment (such as refrigerators) and the surrounding structure (such as cabinets) is usually very small. Furthermore, door-type refrigeration equipment typically uses a hinge structure to connect the door to the cabinet. In this case, a certain amount of space is required for the door to open and close. If the gap is too small, the door can easily interfere with the surrounding structure during opening and closing. On the other hand, the maximum opening angle of the door is also limited by the surrounding structure; a smaller door opening angle makes it difficult for users to access items inside the refrigerator, significantly reducing the user experience. Utility Model Content

[0005] This invention provides a hinge assembly and an embedded refrigeration device, which can solve the problems in the prior art of how to ensure the normal opening of the embedded door structure and the maximum angle after opening.

[0006] The objective of this utility model can be achieved through the following technical solutions: A hinge assembly, comprising: A first hinge, wherein a first groove and a second groove are provided on the first hinge; The second hinge has a first shaft and a second shaft fixedly mounted on it. The first shaft is inserted into the first groove and the second shaft is inserted into the second groove. In one embodiment of this utility model: the first hinge and the second hinge switch between an initial position and an open position; between the initial position and the open position, the first shaft moves along a first trajectory line within the first groove, and the second shaft moves along a second trajectory line within the second groove.

[0007] In one embodiment of this utility model: the first groove includes a first groove, a second groove and a third groove that are connected to each other, and the second groove and the third groove are smoothly transitioned by a first transition groove. The second groove includes a fourth groove, a fifth groove and a sixth groove that are connected to each other, and the fifth groove and the sixth groove are smoothly transitioned by a second transition groove.

[0008] In one embodiment of this utility model: the first groove includes a first groove and a second groove that are connected to each other, and the second groove includes a fourth groove and a fifth groove that are connected to each other. The first groove and the fourth groove extend from the starting end toward the mating surface of the closed box and the door body.

[0009] In one embodiment of this utility model, the included angle between the tangents of the center lines of the second and fifth grooves gradually increases.

[0010] In one embodiment of this utility model: the angle between the movement direction of the first shaft at the starting end of the first groove and the movement direction of the second groove at the starting end of the fourth groove is less than 10°.

[0011] In one embodiment of this utility model: the angle between the movement direction of the first shaft at the end of the first groove and the mating surface of the closed box and the door body is 120°-130°, and the angle between the movement direction of the second shaft at the end of the fourth groove and the mating surface of the closed box and the door body is 155°-165°.

[0012] In one embodiment of this utility model: a guide slope is provided on the first hinge, and the angle between the guide slope and the opening / closing direction of the inner wall of the door body is an acute angle; a thrust member is fixedly provided on the second hinge, and when the door is closed, the thrust member contacts and engages with the guide slope.

[0013] In one embodiment of this utility model, the thrusting component is a cam structure, a piston structure, or a shaft structure.

[0014] In one embodiment of this utility model: the thrust member is a third shaft, and the guide slope is the sidewall of the third groove.

[0015] An embedded cooling device includes a housing and a door body, the housing and the door body being rotatably connected by a hinge assembly as described above.

[0016] The hinge assembly and embedded refrigeration device according to this utility model have at least one of the following technical effects: In this application, the hinge assembly includes a first hinge and a second hinge. The first hinge has a first groove and a second groove, and the second hinge has a first shaft and a second shaft fixedly mounted on it. The first shaft is inserted into the first groove, and the second shaft is inserted into the second groove. The first hinge and the second hinge are configured as a double-axis, double-groove mating structure. The first shaft moves within the first groove, and the second shaft moves within the second groove to drive the first hinge and the second hinge to open or close relative to each other. When one of the first hinge and the second hinge is installed on the door body, and the other is installed on the housing or door frame, the opening and closing of the door body can be controlled. The special structure formed by the double-axis, double-groove structure allows the door body to move along a specific trajectory during the opening and closing process. Throughout the entire trajectory, the door body hardly moves in the direction of the surrounding structure. This ensures smooth opening and closing of the door body even in situations where the space around the embedded device is limited. Furthermore, because the door body can move a certain distance in the opening and closing direction during the fourth stage of opening, the door body can open to a larger angle. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood in conjunction with the following description of the embodiments with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. Wherein: Figure 1 This is a three-dimensional structural diagram of the embedded refrigerator according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the hinge assembly according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the first hinge in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the hinge assembly and the door body in an embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the parameters n, m, s, t, z of the refrigeration equipment in an embodiment of this utility model; Figure 6 This is a structural schematic diagram of the door body and its side edge movement trajectory according to an embodiment of the present invention; Figure 7 This is a structural schematic diagram of the door body opening direction in an embodiment of the present invention; Figure 8 This is a structural schematic diagram of the angle between the shaft movement direction and the first reference plane in an embodiment of the present invention; Figure 9This is a schematic diagram of the motion trajectory of point a in an embodiment of this utility model; Figure 10 This is a schematic diagram of the trajectory of point b in an embodiment of this utility model; Figure 11 This is a schematic diagram of the motion trajectory of the point from 0-30°C in an embodiment of this utility model; Figure 12 This is a schematic diagram of the motion trajectory of point 0-30°d in an embodiment of this utility model; Figure 13 This is a schematic diagram of the door body opening to 15° in an embodiment of this utility model; Figure 14 This is a schematic diagram showing the direction of the axis of motion during the first stage of door opening in an embodiment of this utility model; Figure 15 This is a schematic diagram of the door opening to 30° in an embodiment of this utility model; Figure 16 This is a schematic diagram of the direction of the central axis movement during the second stage of door opening in an embodiment of this utility model; Figure 17 This is a schematic diagram of the door body opening to 90° in an embodiment of this utility model; Figure 18 This is a schematic diagram of the direction of the central axis movement during the third stage of door opening in an embodiment of this utility model; Figure 19 This is a schematic diagram of the structure when the door is opened to its maximum angle in an embodiment of this utility model; Figure 20 This is a structural schematic diagram of the axis movement direction during the fourth stage of door opening in an embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures: 10. Box body; 20. Door body; 30. First groove; 40. Second groove; 50. Third groove; 60. First shaft; 70. Second shaft; 80. Third shaft; 90. Environmental structure; 31. First groove; 32. Second groove; 33. Third groove; 34. First transition groove; 41. Fourth groove; 42. Fifth groove; 43. Sixth groove; 44. Second transition groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In cabinet door opening and closing devices, the door's movement trajectory is typically arc-shaped, and due to the door's thickness, a certain amount of space is required during opening and closing. However, with the increasing popularity of built-in home decoration, more and more users are choosing built-in devices. In this case, the gap between the device and the environment (such as cabinets) is small, making it difficult to ensure normal door opening. Furthermore, the maximum opening angle of the door relative to the cabinet 10 is also significantly limited. To address these issues, this application provides a hinge assembly with a special dual-axis structure, enabling the door to have a specific movement trajectory during opening and closing. In environments with limited space, this assembly avoids interference with the environment while ensuring the maximum opening angle of the door relative to the cabinet 10 after normal opening.

[0021] Please see Figure 1 In one embodiment of this utility model, this application provides an embedded refrigeration device, which includes low-temperature storage devices such as refrigerators, freezers, and ice bars. Of course, the refrigeration device can also be other door-opening devices having a housing 10 and a door assembly, and requiring the door assembly to be able to rotate relative to the housing 10. The following description of the refrigeration device in this application uses a refrigerator as an example; this example is for illustrative purposes only and is not intended to limit the specific form of the refrigeration device.

[0022] Before describing the hinge assembly of the present utility model embodiment, the application scenarios of the hinge assembly of the present utility model embodiment will be described. However, the application scenarios of the hinge assembly of the present utility model embodiment are not limited to the listed application scenarios.

[0023] Please see Figure 1In one embodiment of this utility model, the hinge assembly can be applied to the door body 20, which is openable and closable and connected to the cabinet 10, allowing the user to 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 that is installed in a recessed (flat-mounted) manner, where the front side of the door body 20 is flush with or slightly extends beyond the front wall of the environmental structure 90. In the case of a recessed door installation, it is necessary to ensure that the side edges of the door body 20 do not interfere with the environmental structure 90, and to ensure the opening and closing angle of the door body 20.

[0024] Please see Figure 4-7 In one embodiment of this utility model, the environmental structure 90 can be understood as a wall, cabinet, 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 located between the front side of the door body 20 and the first side wall (the left or right side wall of the door body 20). Figure 4 At the connection point of the right side wall, the front side and the first side wall are located on adjacent sides of the door body 20. The first side wall is located on the hinge side of the door body 20, and the hinge assembly is installed on the hinge side of the door body 20. The opening and closing side of the door body 20 and the hinge side are arranged opposite each other in the left and right direction. On 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 and the first side wall are arranged opposite each other in the left and right direction. Users typically grasp the opening and closing side of the door body 20 to open and close it. Regarding the first side edge: when the front side of the door body 20 intersects with the first side wall, this 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. The first side edge is not limited to a fixed edge line; the first side edge can switch between multiple perpendicular 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 and the rear side (the side of the door body 20 that is used to fit against the housing 10). On the open / closed side of the door body 20, the intersection of the second side wall and the rear side is the third side edge, i.e., point c. The intersection of the second side wall and the front side is the fourth side edge, i.e., point d.

[0025] Please see Figure 2-3In one embodiment of this utility model, a hinge assembly includes a first hinge and a second hinge. The first hinge has a first groove 30 and a second groove 40. The second hinge has a first shaft 60 and a second shaft 70 fixedly disposed on it. The first shaft 60 is inserted into the first groove 30, and the second shaft 70 is inserted into the second groove 40. The first hinge and the second hinge are configured as a double-axis, double-groove mating structure. The first shaft 60 moves within the first groove 30, and the second shaft 70 moves within the second groove 40, thereby driving the first hinge and the second hinge to open or close relative to each other. When one of the first hinge and the second hinge is installed on the door body 20, and the other is installed on the housing 10 or the door frame, the opening and closing control of the door body 20 can be realized.

[0026] Please see Figure 1-8 In one embodiment of this utility model, an example is given where one of the first hinge and the second hinge is disposed on the door body 20 and the other on the housing 10. The housing 10 has an opening on its front side, and the door body 20 switches between an open and closed state. The fact that one of the first hinge or the second hinge is disposed on the hinged side of the door body 20 (or housing 10) can be understood as either the first hinge or the second hinge being integrally formed with the door body 20 (or housing 10), or the first hinge or the second hinge being a separate part fixedly installed on the door body 20 (or housing 10).

[0027] Please see Figure 2-3 In one embodiment of this utility model, the first groove 30 includes a first groove 31, a second groove 32, and a third groove 33 that are connected to each other. The second groove 32 and the third groove 33 are smoothly transitioned by a first transition groove 34. The second groove 40 includes a fourth groove 41, a fifth groove 42, and a sixth groove 43 that are connected to each other. The fifth groove 42 and the sixth groove 43 are smoothly transitioned by a second transition groove 44. The first groove 31 and the fourth groove 41 extend from their starting ends toward the mating surface (first reference surface) of the closed box 10 and the door body 20. The angle between the tangents of the center lines of the second groove 32 and the fifth groove 42 gradually increases to ensure that the door body 20 opens relative to the box 10 as quickly as possible. When the first shaft 60 is located in the first transition groove 34 and the second shaft 70 is located in the second transition groove 44, the direction of movement of the shaft changes significantly. By setting the first transition groove 34 and the second shaft 70, the smooth transition of this movement process is ensured. During the operation of the first shaft 60 located in the third groove 33 and the second shaft 70 located in the sixth groove 43, the door is opened to the maximum angle.

[0028] Please see Figure 2-3In one embodiment of this utility model, when the first shaft 60 is in the first groove 31, the second shaft 70 is located in the fourth groove 41. In this case, the first shaft 60 and the second shaft 70 can move relative to their respective groove structures towards the first reference surface. When the first shaft 60 moves within the second groove 32, the second shaft 70 is located within the fifth groove 42. When the first shaft 60 moves within the third groove 33, the second shaft 70 is located within the sixth groove 43. The second groove 32 is provided at the terminating end of the first groove 31, allowing the first shaft 60 to move from the first groove 31 to the second groove 32. The fifth groove 42 is provided at the terminating end of the fourth groove 41, allowing the second shaft 70 to move from the fourth groove 41 to the fifth groove 42.

[0029] Please see Figure 2-3 In one embodiment of this utility model, the first hinge and the second hinge switch between an initial position (i.e., the closed state) and an open position. In the initial position, the first shaft 60 is located at the end of the first groove 31 away from the second groove 32, and the second shaft 70 is located at the end of the fourth groove 41 away from the fifth groove 42. Between the initial position and the open position, the first shaft 60 moves along a first trajectory line within the first groove 30, and the second shaft 70 moves along a second trajectory line within the second groove 40. In the open position, the first shaft 60 is located in the third groove 33, and the second shaft 70 is located in the sixth groove 43.

[0030] Please see Figure 2-3 In one embodiment of this utility model, a first transition portion is provided between the first groove 31 and the second groove 32, and between the fourth groove 41 and the fifth groove 42, respectively, so that the first rotating shaft can smoothly enter the second groove 32 from the first groove 31, and at the same time, the second rotating shaft can smoothly enter the fifth groove 42 from the fourth groove 41. Other connected and adjacent grooves can be provided with corresponding transition portions, which make the entire door opening trajectory smooth and unobstructed. The fifth groove 42 and the second transition groove 44 are set at an angle, and the inner sidewalls of the two are convex to form a blocking portion, ensuring that when the first shaft 60 is in the third groove 33, the second shaft 70 can be positioned in the sixth groove 43 and maintain the overall direction of movement. Simultaneously, the process of the second shaft 70 entering the sixth groove 43 from the fifth groove 42 and completing its positioning causes the first hinge to move relative to the second hinge towards the open side, reducing the distance the first side edge moves outward during the door opening process and preventing interference between the first side edge of the door body 20 and the adjacent environment.

[0031] Please see Figure 2-3In one embodiment of this utility model, during the initial stage of opening the door, the user typically grasps the door body 20 on the opening / closing side to open and close the door body 20. In the aforementioned double-axis, double-groove mating trajectory, initially, the movement directions of the first axis 60 and the second axis 70 relative to their respective grooves are generally towards the mating surfaces of the housing 10 and the door body 20. During the moment of opening the door until the door is opened to 15°, there are instances where the angle between the movement directions of the first axis 60 (i.e., the first axis 60) and the second axis 70 (i.e., the second axis 70) is less than 10°, which can lead to an incorrect relative sliding operation. Simultaneously, the existence of a mating gap between the axis and the groove makes it possible for the door body 20 to jam during opening and closing. Therefore, a guide slope is provided on the first hinge, and the angle between the guide slope and the opening / closing direction of the inner wall of the door body 20 is an acute angle. A thrust member is fixedly provided on the second hinge, and in the closed state, the thrust member contacts and engages with the guide slope. Thus, at the moment of opening, regardless of how the direction of the force applied to the door body 20 changes, through the cooperation of the thrust component and the guide ramp, there is always a component force in the positive y-axis direction, so that the movement of the hinge side of the door body 20 and the rotation of the door body are synchronized.

[0032] Please see Figure 2-3 In one embodiment of this utility model, the thrust member can be implemented as a cam, piston (push rod), shaft, or other means. When the structural form of the thrust member changes, the guide slope adapts accordingly. As an example, the thrust member is a third shaft 80, and the guide slope is embodied by a corresponding third groove 50 formed on the second hinge. The third groove 50 includes a groove portion that engages with the third shaft 80 in the closed state, and an inclined planar portion that engages with the third shaft 80 during the opening process, used to provide a component force during the opening process and to assist in correcting the motion state of the overall motion trajectory in the first stage.

[0033] The working principle of this utility model: Please see Figure 9-20 The following describes the opening and closing process of the door body 20 with the first hinge fixedly installed on the door body and the second hinge fixedly installed on the housing 10. The door body 20 can also be directly used as the first hinge. In this case, the first groove and the second groove 40 are directly opened at the bottom of the door body 20.

[0034] In the closed state, the plane containing the side of the housing 10 that mates with the door body 20 is defined as the first reference plane. The plane containing the side of the housing 10 perpendicular to the first reference plane is defined as the second reference plane. A plane parallel to the first reference plane and spaced at a specified distance (the specified distance can be the door thickness t) is defined as the third reference plane. A plane parallel to the second reference plane and spaced at a specified distance is defined as the fourth reference plane. The fourth reference plane can be understood as a plane parallel to the side of the housing 10 and the environmental structure 90. The distance between the second and fourth reference planes is n, which is the distance between the side wall of the housing 10 and the environmental structure 90. The hinge assembly is located between the first and third reference planes. In this embodiment, the plane containing the front side of the door body 20 in the closed state can be selected as the third reference plane. In the top / bottom view, the four side edges of the door body 20 are defined as points a, b, c, and d (positions are as follows). Figure 4 As shown), in the closed state, ab coincides with the second reference plane, and bc is parallel to the first reference plane. The door thickness is defined as t, the door box spacing when the door is closed is m, the door center gap spacing is z, and in the closed state, the distance between the axis of the first shaft 60 and the front side of the door body 20 (i.e., the third reference plane) is defined as s.

[0035] When the door is closed, the first shaft 60 is located at the starting end of the first groove 3030, and the second shaft 7070 is located at the starting end of the second groove 4040. The door and the housing 10 are connected by a hinge assembly to achieve opening and closing, and the opening and closing process is divided into four stages.

[0036] In the first stage, the door opens 0-15°. The first shaft 60 moves in the first groove 31, and the second shaft 70 moves in the fourth groove 41. During this stage, the three endpoints a, b, and c are prone to offset and interference. To ensure that point a does not interfere with the side wall (fourth reference plane), the door needs to move to the left when opening. However, to prevent point c from having two doors or interfering with the left side wall (single door case), the door needs to move to the right when opening. Therefore, this contradictory requirement needs to be resolved through trajectory. During the process of the door opening 0-15°, the outward movement of the door ( Figure 4 The distance the door moves (as shown above) is such that point a exceeds the front side (third reference plane) by a certain distance, and then the door moves to the right to avoid interference between point a and the right side wall, and also reduces the distance point c moves to the left. To meet the above requirements, the trajectory in this stage has a first axis 60 (corresponding to...) Figure 14 Central axis 1) and second axis 70 (corresponding) Figure 14 If the angle between the movement directions of the central axis 2) position is less than 10°, it will lead to an incorrect running mode of relative sliding. Therefore, it is necessary to add a third axis 80 to assist in correcting the overall trajectory movement state.

[0037] The motion angle data of the first-stage trajectory at the axis position are as follows: Figure 14 As shown. The motion angle ranges of the first shaft 60 and the second shaft 70 in the first stage satisfy the following: Initially, the initial motion angle difference between the first shaft 60 and the second shaft 70 is less than 10°; at the end of the first stage, the motion direction angle of the first shaft 60 is between 120° and 130°, and the motion direction angle of the second shaft 70 is between 155° and 165°. Here, the motion direction angle refers to the instantaneous movement direction of the shaft, i.e., the tangent direction of the trajectory line, which is also the tangent direction of the centerline of the groove, and the angle between this tangent and the first reference surface.

[0038] In the second stage, the door opens 15°-30°. The first shaft 60 moves in the second groove 32, and the second shaft 70 moves in the fifth groove 42. In this stage, point a returns to below the front side (third reference plane), point b is above the starting point, and point c does not exceed 3mm beyond the left side (when the door is closed). The motion angle data of the trajectory at the axis position in this stage are as follows: Figure 16 As shown in the figure, Series 1 corresponds to the first axis 60, and Series 2 corresponds to the second axis 70. The motion angle ranges of the first axis 60 and the second axis 70 in the second stage satisfy the following: the initial motion angles of the first axis 60 and the second axis 70 at the beginning of the second stage are consistent with those at the end of the first stage; at the end of the second stage, the motion direction angle of the first axis 60 is between 110° and 120°, and the motion direction angle of the second axis 70 is between 175° and 185°. After the end of the first stage, the angle between the motion directions of the first axis 60 and the second axis 70 is never less than 10°, therefore the third axis 80 no longer needs to participate in the trajectory operation, reducing running resistance. After 30°, the distance between point c and the left side increases, and there will no longer be any motion interfering with the left side wall.

[0039] In the third stage, the door opens from 30° to 90°. During this stage, the distance between point a and the right side wall (fourth reference plane) remains within 3mm, and point b is above the initial position. The motion angle data of the trajectory at the axis position during this stage are as follows: Figure 18 As shown, the motion angle ranges of the first axis 60 (Series 1) and the second axis 70 in the third stage satisfy the following: at the beginning of the third stage, the initial motion angles of the first axis 60 and the second axis 70 are consistent with those at the end of the second stage; at the end of the third stage, the motion direction angle of the first axis 60 is between 45° and 58°, and the motion direction angle of the second axis 70 is between 115° and 125°. This trajectory satisfies that when the door is opened to 90°, the distance between point a and the side surface (second reference surface) of the box 10 is less than 2mm.

[0040] In the fourth stage, the door moves to the left, increasing the opening angle within the limited space. From the end of the third stage to the fourth stage, the movement directions of the first axis 60 and the second axis 70 change significantly, adjusting the original movement trajectory of the door to increase the resultant movement to the left. The change in movement direction angle from the third to the fourth stage is greater than 40° but less than 50°. This stage's movement process is smoothly transitioned through the first transition groove 34 and the second transition groove 44. The movement angle range of the first axis 60 and the second axis 70 in the fourth stage satisfies the following: the initial movement angles of the first axis 60 and the second axis 70 in the fourth stage are consistent with those at the end of the third stage; at the end of the fourth stage, the movement direction angle of the first axis 60 is between 140° and 160°, and the movement direction angle of the second axis 70 is between 210° and 230°.

[0041] Please see Figure 9-12 These are schematic diagrams showing the movement trajectories of the four side edges, i.e., the four endpoints, of the door body 20. Figure 9 , Figure 10 Points a and b represent the movement trajectories during the entire door opening process. Figure 11 , Figure 12 The motion trajectories of points c and d are respectively the movement trajectories of the door opening and closing from 0 to 30 degrees (the two endpoints c and d only have the risk of interference between the two doors within 30 degrees of door opening and closing, and the other states have little impact on the opening and closing of the door).

[0042] Please see Figure 5 During the opening and closing of the door, the side wall distance *n* is the distance between point *a* and the surrounding environment. When *t* ≤ 50mm, *m* ≤ 6mm, and *s* ≤ 5.5mm, *n* ≤ 3.5mm. In a typical built-in refrigerator, when the door is closed, the front of the door is generally higher than or level with the front of the cabinet or other obstructions. Therefore, *n* in actual use can be less than 3.5mm. As shown in the trajectory diagram of point *a*, *ax* represents the location where interference might occur due to the side wall distance within the front side of the door in its actual open / closed state. 3.5mm ≥ *n* ≥ *ax* > 0.

[0043] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

[0044] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A hinge assembly, characterized by include: A first hinge, wherein a first groove (30) and a second groove (40) are provided on the first hinge; The second hinge has a first shaft (60) and a second shaft (70) fixedly mounted on it. The first shaft (60) is inserted into the first groove (30), and the second shaft (70) is inserted into the second groove (40). The first hinge and the second hinge switch between an initial position and an open position; between the initial position and the open position, the first shaft (60) moves along a first trajectory line in the first groove (30), and the second shaft (70) moves along a second trajectory line in the second groove (40).

2. The hinge assembly of claim 1, wherein, The first groove (30) includes a first groove (31), a second groove (32) and a third groove (33) that are connected. The second groove (32) and the third groove (33) are smoothly connected by a first transition groove (34). The second groove (40) includes a fourth groove (41), a fifth groove (42) and a sixth groove (43) that are connected. The fifth groove (42) and the sixth groove (43) are smoothly connected by a second transition groove (44).

3. The hinge assembly of claim 1, wherein, The first groove (30) includes a first groove (31) and a second groove (32) that are connected to each other. The second groove (40) includes a fourth groove (41) and a fifth groove (42) that are connected to each other. The first groove (31) and the fourth groove (41) extend from the starting end toward the mating surface of the closed box (10) and the door body (20).

4. The hinge assembly of claim 3, wherein, The angle between the tangents of the center lines of the second groove (32) and the fifth groove (42) gradually increases.

5. The hinge assembly of claim 4, wherein, The angle between the direction of movement of the first shaft (60) at the starting end of the first groove (31) and the direction of movement of the second groove (40) at the starting end of the fourth groove (41) is less than 10°.

6. The hinge assembly of claim 5, wherein, The angle between the direction of movement of the first shaft (60) at the end of the first groove (31) and the mating surface of the closed box (10) and the door body (20) is 120°-130°, and the angle between the direction of movement of the second shaft (70) at the end of the fourth groove (41) and the mating surface of the closed box (10) and the door body (20) is 155°-165°.

7. The hinge assembly of claim 1, wherein, The first hinge is provided with a guide slope, and the angle between the guide slope and the opening and closing direction of the inner wall of the door body (20) is an acute angle. A thrust member is fixedly provided on the second hinge. When the door is closed, the thrust member is in contact with the guide slope.

8. The hinge assembly of claim 7, wherein, The thrust component is a cam structure, a piston structure, or a shaft structure.

9. The hinge assembly of claim 7, wherein, The thrust component is the third shaft (80), and the guide slope is the side wall of the third groove (50).

10. An embedded refrigeration appliance comprising a cabinet (10) and a door body (20), characterized in that, The housing (10) and the door body (20) are rotatably connected by a hinge assembly as described in any one of claims 1 to 9.

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