Acquisition method of auxiliary groove in hinge assembly, hinge assembly and refrigeration device

Abstract

The invention provides an auxiliary groove obtaining method, a hinge assembly and a refrigerating device with the hinge assembly. In the plane of a main groove and an auxiliary groove, a rectangular coordinate system is established with the circle center of the main groove as the origin O, the horizontal axis which passes through the origin O and extends in the first direction as the y axis and the vertical axis which passes through the origin O and is perpendicular to the first direction as the x axis; fitting according to formulas xt2 = xt1-K * cos (theta + A * t) and yt2 = yt1 + K * sin (theta + A * t) to obtain a motion trajectory of the countershaft; wherein xt1 is equal to R * cos (A * t), yt1 is equal to R * sin (A * t), the interval of t is [0, 1], A is the opening angle of the door body when the main shaft moves to the terminal position, R is the distance between the axis of the main shaft and the circle center of the main groove, K is the distance between the axis of the main shaft and the axis of the auxiliary shaft, and theta is the included angle between the connecting line of the axis of the main shaft and the axis of the auxiliary shaft and the x axis when the door body is in a closed state; obtaining an auxiliary groove according to the motion track line and the auxiliary shaft; and the door body can uniformly translate and rotate in the rotary opening process, so that the condition of reciprocating motion is avoided, and the motion stability of the door body is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a method for obtaining a secondary slot in a hinge assembly, a hinge assembly formed by the method for obtaining the secondary slot, and a refrigeration device having the hinge assembly. Background Art

[0002] A refrigeration device is a device for storing food in a low-temperature environment. According to the needs of food storage, it is stored by freezing or refrigerating to achieve the purpose of freshness preservation.

[0003] Generally, a refrigeration device, such as a refrigerator, generally includes a box body and a door body rotatably connected to the box body around a fixed hinge axis. During the process of rotating and opening the door body around the fixed hinge axis, on the one hand, the rotating end of the door body will protrude outward too much along the transverse direction outside the box body, resulting in that in the application scenario of an embedded refrigerator, during the opening process of the door body, it is easy to interfere with external environmental components (such as cabinets, etc.), affecting the opening of the door body, so that the existing refrigeration device with the door body rotating around a fixed hinge axis is not suitable for the embedded use scenario; on the other hand, when the door body is opened to the maximum opening angle greater than 90°, the rotating end of the door body will block part of the accommodating space of the box body, affecting the pulling and pushing of the shelves / drawers, etc. in the box body and affecting the user's access to items.

[0004] In some existing refrigerators, a double-axis double-slot structure (two hinge axes respectively corresponding to two hinge slots) is adopted to movably connect the door body to the box body, so that the door body can generate translation along a preset direction while rotating and opening, so as to increase the applicable scenario of the refrigerator and improve the user experience. However, in the existing double-axis double-slot structure, during the door opening process, the hinge axis has to rotate and translate in the corresponding hinge slot, and the movement is not stable, thus affecting the control of the door opening and closing trajectory and the smoothness of the door opening and closing. Summary of the Invention

[0005] The present invention provides a method for obtaining a secondary slot in a hinge assembly, a hinge assembly formed by the method for obtaining the secondary slot, and a refrigeration device having the hinge assembly.

[0006] To achieve the above object, the technical solution provided by the present invention is as follows: A method for obtaining a secondary slot in a hinge assembly, the hinge assembly being used to movably connect a door body to a box body, the hinge assembly including a guiding shaft provided on one of the box body and the door body, and a guiding slot provided on the other of the box body and the door body, the guiding shaft including a main shaft and a secondary shaft, the guiding slot including a main slot that cooperates with the main shaft and a secondary slot that cooperates with the secondary shaft, the main slot being an arc slot, and the main slot having opposite initial positions and terminal positions. When the door body is in the closed state, the main shaft is located at the initial position; when the door body rotates and opens relative to the box body, the main shaft moves from the initial position towards the terminal position. The hinge assembly has a pivot end and a free end that are oppositely arranged in a first direction; the method for obtaining the secondary slot includes the following steps:

[0007] In the plane where the main slot and the secondary slot are located, with the center of the main slot as the origin O, the horizontal axis passing through the origin O and extending in the first direction as the y-axis, and the vertical axis passing through the origin O and perpendicular to the first direction as the x-axis, a rectangular coordinate system is established; wherein, the direction towards the free end of the y-axis is the positive direction, and the direction towards the main slot of the x-axis is the positive direction;

[0008] According to the formula x t2 = x t1 - K * cos(θ + A * t), y t2 = y t1 + K * sin(θ + A * t), the movement trajectory line of the secondary shaft is obtained by fitting; wherein, x t1 = R * cos(A * t), y t1 = R * sin(A * t), (x t1 , y t1 ) is the axis center coordinate of the main shaft, the interval of t is [0, 1], A is the opening angle of the door body when the main shaft moves to the terminal position, R is the distance between the axis center of the main shaft and the center of the main slot, K is the distance between the axis center of the main shaft and the axis center of the secondary shaft, and θ is the included angle between the connection line of the axis centers of the main shaft and the secondary shaft when the door body is in the closed state and the x-axis;

[0009] The secondary slot is obtained according to the movement trajectory line and the secondary shaft.

[0010] As a further improvement of the present invention, t = L1 / L, where L is the length of the main shaft trajectory line when the main shaft moves from the initial position to the terminal position, and L1 is the length that the main shaft moves from the initial position towards the terminal position at any moment during the process of the door body rotating and opening relative to the box body.

[0011] As a further improvement of the present invention, during the process of the main shaft moving from the initial position to the terminal position, the direction in which the hinge assembly drives the door body to translate has a direction component of the positive y-axis and the negative x-axis.

[0012] As a further improvement of the present invention, the hinge assembly includes a hinge plate for fixing to the box body. The hinge plate includes a fixing portion for fixing to the box body and a horizontal plate connected to the fixing portion. Both the main groove and the secondary groove are provided on the horizontal plate, and the main shaft and the secondary shaft are provided on the door body.

[0013] As a further improvement of the present invention, the secondary groove is located on one side of the main groove facing the free end, and the center of the main groove is located on one side of the main groove facing the pivot end; in the direction from the initial position to the terminal position, the main groove faces the free end and extends towards the fixing portion.

[0014] To achieve the above invention object, the present invention also provides a hinge assembly. The hinge assembly is used to movably connect the door body to the box body. The hinge assembly includes a guiding shaft for being provided on one of the box body and the door body, and a guiding groove for being provided on the other of the box body and the door body. The guiding shaft includes a main shaft and a secondary shaft, and the guiding groove includes a main groove for cooperating with the main shaft and a secondary groove for cooperating with the secondary shaft; the secondary groove is obtained by the obtaining method of the secondary groove in the above hinge assembly.

[0015] As a further improvement of the present invention, the hinge assembly further includes a hinge plate for fixing to the box body. The hinge plate includes a fixing portion for fixing to the box body and a horizontal plate connected to the fixing portion. Both the main groove and the secondary groove penetrate through the horizontal plate.

[0016] The main shaft includes a first shaft section for cooperating with the door body, a second shaft section for cooperating with the main groove, and first limiting members provided at opposite ends of the second shaft section and respectively abutting against opposite sides of the horizontal plate.

[0017] The secondary shaft includes a third shaft section for cooperating with the door body, a fourth shaft section for cooperating with the secondary groove, and second limiting members provided at opposite ends of the fourth shaft section and respectively abutting against opposite sides of the horizontal plate.

[0018] To achieve the above invention object, the present invention also provides a refrigeration device, including a box body, a door body, and the above hinge assembly for movably connecting the door body to the box body.

[0019] As a further improvement of the present invention, the guiding groove is provided on the box body, and the guiding shaft is provided on the door body; a first shaft sleeve for cooperating with the main shaft and a second shaft sleeve for cooperating with the secondary shaft are recessed on the door body.

[0020] As a further improvement of the present invention, the refrigeration device is an embedded refrigeration device.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: The secondary groove obtained by the method for obtaining the secondary groove in the present invention enables the main shaft to move uniformly and rotate uniformly along the main groove, and the secondary shaft to move uniformly and rotate uniformly along the secondary groove during the process of the door body rotating and opening. Thus, the door body can translate and rotate uniformly during the process of rotating and opening, avoiding reciprocating motion and improving the smoothness of the movement of the door body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a hinge assembly in a specific embodiment of the present invention;

[0023] Figure 2 is Figure 1 an exploded view of the hinge assembly in

[0024] Figure 3 is Figure 1 a top view of the hinge assembly in (the door body is in the closed state);

[0025] Figure 4 is Figure 1 a top view of the hinge assembly in (the door body is in the state of rotating and opening);

[0026] Figure 5 is a schematic structural diagram of a refrigeration device in a specific embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will combine the attached Figures 1 to 5 drawings in the specific 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 a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, connection can be direct connection or indirect connection through an intermediate medium, and can be fixed connection, movable connection, detachable connection or integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Please refer to Figures 1 to 5As shown, the present invention provides a method for obtaining the secondary groove 4 in the hinge assembly 10. The hinge assembly 10 is used to movably connect the door body 6 to the cabinet body 5. The hinge assembly 10 includes a guiding shaft disposed on one of the cabinet body 5 and the door body 6, and a guiding groove disposed on the other of the cabinet body 5 and the door body 6. The guiding shaft includes a main shaft 1 and a secondary shaft 2. The guiding groove includes a main groove 3 that cooperates with the main shaft 1 and a secondary groove 4 that cooperates with the secondary shaft 2. After movably connecting the door body 6 to the cabinet body 5 through the hinge assembly 10, during the process of the door body 6 rotating and opening, the main shaft 1 moves along the main groove 3, and the secondary shaft 2 moves along the secondary groove 4, so that the door body 6 synchronously translates along a preset direction while rotating and opening, enabling the corresponding refrigeration device 100 to be applicable to multiple scenarios, such as an embedded scenario, and enhancing the versatility of the refrigeration device 100.

[0030] In a specific embodiment, the guiding shaft is disposed on the door body 6, that is, both the main shaft 1 and the secondary shaft 2 are disposed on the door body 6. The guiding groove is disposed on the cabinet body 5. Specifically, the hinge assembly 10 further includes a hinge plate 7 fixed to the cabinet body 5. The hinge plate 7 includes a fixing portion 71 fixed to the cabinet body 5 and a horizontal plate 72 connected to the fixing portion 71. Both the main groove 3 and the secondary groove 4 are disposed on the horizontal plate 72. Of course, this is not limited thereto. In other embodiments, the guiding shaft may also be disposed on the horizontal plate 72. Correspondingly, the guiding groove is disposed on the door body 6.

[0031] Specifically, the main groove 3 is an arc groove. In the present invention, the secondary groove 4 is obtained on the premise that the main shaft 1, the secondary shaft 2, and the main groove 3 are all determined. Through the cooperation between the secondary shaft 2 and the secondary groove 4, during the process of the door body 6 rotating and opening, the main shaft 1 moves and rotates uniformly along the main groove 3, and the secondary shaft 2 moves and rotates uniformly along the secondary groove 4. Thus, the door body 6 can translate and rotate uniformly during the process of rotating and opening, avoiding reciprocating motion and improving the smoothness of the movement of the door body 6.

[0032] Combined with Figures 3 to 4 As shown, it is defined that the hinge assembly 10 has a pivot end and a free end disposed opposite to each other along the first direction F. That is, the pivot end and the free end are arranged along the first direction F. It can be known that the pivot end refers to the end corresponding to the end where the hinge assembly 10 rotates relative to the cabinet body 5 with respect to the door body 6. After movably connecting the door body 6 to the opening side of the cabinet body 5 through the hinge assembly 10, the corresponding first direction F is also parallel to the plane where the opening side is located.

[0033] Specifically, the main groove 3 has opposite initial position B and terminal position C. When the door body 6 is in the closed state, the main shaft 1 is located at the initial position B; when the door body 6 rotates and opens relative to the box body 5, the main shaft 1 moves from the initial position B towards the terminal position C. Combining Figure 2 As shown, the acquisition method of the auxiliary groove 4 includes the following steps:

[0034] In the plane where the main groove 3 and the auxiliary groove 4 are located, taking the center of the circle corresponding to the main groove 3 as the origin O, taking the horizontal axis passing through the origin O and extending along the first direction as the y-axis, and taking the vertical axis passing through the origin O and perpendicular to the first direction as the x-axis, a rectangular coordinate system is established; wherein, the direction towards the free end of the y-axis is the positive direction, and the direction towards the main groove of the x-axis is the positive direction;

[0035] According to the formula x t2 = x t1 -K*cos(θ + A*t), y t2 = y t1 +K*sin(θ + A*t), the motion trajectory line of the auxiliary shaft 2 is obtained by fitting; wherein, x t1 = R*cos(A*t), y t1 = R*sin(A*t), (x t1 , y t1 ) is the axis center coordinate of the main shaft 1, the interval of t is [0, 1], A is the opening angle of the door body 6 when the main shaft 1 moves to the terminal position, R is the distance between the axis center of the main shaft 1 and the center of the circle of the main groove 3, K is the distance between the axis center of the main shaft 1 and the axis center of the auxiliary shaft 2, and θ is the included angle between the connection line of the axis centers of the main shaft 1 and the auxiliary shaft 2 and the x-axis when the door body 6 is in the closed state;

[0036] The auxiliary groove 4 is obtained according to the motion trajectory line D and the auxiliary shaft 2.

[0037] Among them, (x t2 , y t2 ) is the coordinate of any point on the motion trajectory line D. Thus, the motion trajectory line D of the auxiliary shaft 2 can be obtained by jointly fitting according to the formula x t2 = x t1 -K*cos(θ + A*t), y t2 = y t1 +K*sin(θ + A*t).

[0038] Specifically, when the main shaft 1 is located at the initial position B, the auxiliary shaft 2 is located at the first position E, and θ is the included angle between BE and the x-axis.

[0039] Specifically, \(t = L1 / L\), where \(L\) is the length of the main shaft trajectory line \(M\) when the main shaft 1 moves from the initial position B to the terminal position C, and \(L1\) is the length that the main shaft 1 moves from the initial position B towards the terminal position C at any moment during the process of the door body 6 rotating and opening relative to the box body 5. That is, \(t\) can be regarded as the ratio of the distance that the main shaft 1 moves when the door body 6 rotates and opens to the length of the entire main shaft trajectory line M.

[0040] Next, as shown in Figure 4 below, the derivation process of the above formula will be described as follows:

[0041] Assume that when the door body 6 rotates and opens to a position where the axis of the main shaft 1 moves a distance of L1 from the initial position B towards the terminal position C, at this time, \(t = L1 / L\), the main shaft 1 is located at point G, and the auxiliary shaft 2 is located at point H. Since the door body 6 rotates evenly during the opening process, at this time, the rotation opening angle α of the door body 6 = A*t. At this time, the coordinate x of the main shaft 1 t1 = R*cos(A*t), y t1 = R*sin(A*t);

[0042] As shown in Figure 4 below, draw a straight line l1 perpendicular to the x-axis from point H, draw a straight line l2 perpendicular to the y-axis from point G. The straight line l2 intersects the straight line l1 at point I and intersects the y-axis at point J. Among them, the length of GJ is the coordinate x of the main shaft 1 t1 = R*cos(A*t). In ΔHGI, ∠HGI = θ + A*t, HG = K. Therefore, GI = K*cos(θ + A*t), HI = K*sin(θ + A*t). Therefore, the coordinate x of the auxiliary shaft at point H t2 = x t1 - K*cos(θ + A*t), y t2 = y t1 + K*sin(θ + A*t).

[0043] It can be known that after obtaining the movement trajectory line D, the auxiliary groove 4 can be obtained together with information such as the size of the auxiliary shaft 2. Thus, the formed auxiliary groove 4 is used as the auxiliary groove 4 in the hinge assembly 10, so that during the process of the door body 6 rotating and opening, the purpose of uniform translation and uniform rotation can be achieved, and the smoothness of the movement during the process of the door body 6 rotating and opening can be improved.

[0044] In a specific embodiment where the guiding groove is configured to be disposed on a hinge plate 7 fixed to a box body 5, the main groove 3 is a short groove near the pivot end, and the secondary groove 4 is a long groove located on one side of the main groove 3 away from the pivot end. Of course, this is not limiting. In other embodiments, the main groove 3 may also be a long groove disposed on the side of the secondary groove 4 away from the pivot end. In this case, the secondary groove 4 is a short groove.

[0045] Further, during the process of the main shaft 1 moving from the initial position B to the terminal position C, the direction in which the hinge assembly 10 drives the door body 6 to translate has direction components in the positive y-axis direction and the negative x-axis direction. That is, during the process of the door body 6 rotating and opening, on the one hand, the hinge assembly 10 drives the door body 6 to move away from the external environmental component located at the pivot end so that the door body 6 is away from the external environmental component, which can avoid interference between the door body 6 and external environmental components (such as the cabinet 20, etc.); on the other hand, the hinge assembly 10 synchronously drives the door body 6 to translate in the direction of the box body 5, that is, moves the door body 6 backward, reducing the distance between the door body 6 and the box body 5, moving the center of gravity of the door body 6 backward, and avoiding the door body 6 from tipping over.

[0046] Specifically, in a specific embodiment where the main groove 3 is a short groove, the main groove 3 is arranged such that the center of the main groove 3 is located on the side of the main groove 3 facing the pivot end; in the direction from the initial position B towards the terminal position C, the main groove 3 faces the free end and extends towards the fixing portion 71.

[0047] Further, in combination with Figure 5 As shown, the present invention further provides a hinge assembly 10 and a refrigeration device 100 having the hinge assembly 10. The refrigeration device 100 includes a box body 5, a door body 6, and the above-mentioned hinge assembly 10 that movably connects the door body 6 to the box body 5.

[0048] In a specific embodiment, the refrigeration device 100 is an embedded refrigeration device. Of course, this is not limiting.

[0049] In combination with Figures 1 to 2As shown, the hinge assembly 10 includes a guide shaft configured to be disposed on one of the cabinet 5 and the door 6, and a guide groove configured to be disposed on the other of the cabinet 5 and the door 6. The guide shaft includes a main shaft 1 and a sub-shaft 2. The guide groove includes a main groove 3 that cooperates with the main shaft 1 and a sub-groove 4 that cooperates with the sub-shaft 2. The sub-groove 4 is obtained by the method for obtaining the sub-groove 4 in the hinge assembly 10 described above. During the process of the door 6 rotating and opening, the main shaft 1 moves uniformly and rotates uniformly along the main groove 3, and the sub-shaft 2 moves uniformly and rotates uniformly along the sub-groove 4. Thus, the door 6 is driven to translate uniformly and rotate uniformly during the process of rotating and opening, improving the stability of the rotation and opening movement of the door 6.

[0050] In a specific embodiment, the guide shaft is disposed on the door 6, and the guide groove is disposed on the cabinet 5. Specifically, the hinge assembly 10 further includes a hinge plate 7 configured to be fixed to the cabinet 5. The hinge plate 7 includes a fixing portion 71 configured to be fixed to the cabinet 5 and a horizontal plate 72 connected to the fixing portion 71. Both the main groove 3 and the sub-groove 4 are disposed on the horizontal plate 72. Of course, this is not limiting. In other embodiments, the guide shaft may also be disposed on the horizontal plate 72. Correspondingly, the guide groove is disposed on the door 6.

[0051] Further, in a specific embodiment where the guide groove is disposed on the hinge plate 7 fixed to the cabinet 5, the main groove 3 is a short groove near the pivot end, and the sub-groove 4 is a long groove located on one side of the main groove 3 away from the pivot end. Of course, this is not limiting. In other embodiments, the main groove 3 may also be a long groove disposed away from the pivot end of the sub-groove 4. At this time, the sub-groove 4 is a short groove. Specifically, in a specific embodiment where the main groove 3 is a short groove, the main groove 3 is arranged such that the center of the main groove 3 is located on the side of the main groove 3 facing the pivot end; in the direction from the initial position B to the terminal position C, the main groove 3 faces the free end and extends towards the fixing portion 71. After the hinge assembly 10 is applied to the refrigeration device 100, during the process of the door 6 rotating and opening, the main shaft 1 moves from the initial position B towards the terminal position C, driving the door 6 to translate towards the free end and towards the direction where the cabinet 5 is located. Thus, it is possible to avoid interference between the door 6 and external environmental components (such as the cabinet 20, etc.), and at the same time, the door 6 can be moved backward, reducing the distance between the door 6 and the cabinet 5, shifting the center of gravity of the door 6 backward, avoiding the door 6 from tipping over, and making the refrigeration device 100 suitable for an embedded usage scenario.

[0052] Furthermore, both the main slot 3 and the secondary slot 4 penetrate through the horizontal plate 72. The main shaft 1 includes a first shaft section 11 that cooperates with the door body 6, a second shaft section 12 that cooperates with the main slot 3, and first limit members 13 provided at opposite ends of the second shaft section 12 and respectively abutting against opposite sides of the horizontal plate 72. The secondary shaft 2 includes a third shaft section 21 that cooperates with the door body 6, a fourth shaft section 22 that cooperates with the secondary slot 4, and second limit members 23 provided at opposite ends of the fourth shaft section 22 and respectively abutting against opposite sides of the horizontal plate 72. Thereby, the axial movement of the main shaft 1 and the secondary shaft 2 relative to the horizontal plate 72 can be restricted, enabling a certain distance to be maintained between the horizontal plate 72 and the end face of the door body 6, avoiding interference that affects the movement of the door body 6, and at the same time, improving the stability of the hinge assembly 10.

[0053] Specifically, the door body 6 is recessed with a first bushing that cooperates with the main shaft 1 and a second bushing that cooperates with the secondary shaft 2. That is, the first bushing cooperates with the first shaft section 11, and the second bushing cooperates with the third shaft section 21. During assembly, it is only necessary to insert the first shaft section 11 into the first bushing and at the same time insert the third shaft section 21 into the second bushing to achieve the assembly between the hinge assembly 10 and the door body 6, which is convenient for assembly.

[0054] In summary, through the secondary slot 4 obtained by the method for obtaining the secondary slot 4 in the present invention, during the process of the door body 6 rotating and opening, the main shaft 1 moves uniformly and rotates uniformly along the main slot 3, and the secondary shaft 2 moves uniformly and rotates uniformly along the secondary slot 4. Thereby, the door body 6 can translate and rotate uniformly during the process of rotating and opening, avoiding the situation of reciprocating motion and improving the smoothness of the movement of the door body 6.

[0055] It should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0056] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for obtaining a secondary groove in a hinge assembly, the hinge assembly being used to movably connect a door body to a box body, the hinge assembly including a guide shaft provided on one of the box body and the door body, and a guide groove provided on the other of the box body and the door body, the guide shaft including a main shaft and a secondary shaft, the guide groove including a main groove cooperating with the main shaft and a secondary groove cooperating with the secondary shaft, the main groove being an arc groove, and the main groove having opposite initial positions and terminal positions, when the door body is in a closed state, the main shaft is located at the initial position; when the door body rotates and opens relative to the box body, the main shaft moves from the initial position towards the terminal position, the hinge assembly having pivot ends and free ends oppositely arranged in a first direction; characterized in that: The method for obtaining the auxiliary slot includes the following steps: In the plane where the main slot and the auxiliary slot are located, taking the center of the main slot as the origin O, taking the horizontal axis passing through the origin O and extending along the first direction as the y-axis, and taking the vertical axis passing through the origin O and perpendicular to the first direction as the x-axis, a rectangular coordinate system is established; wherein, the positive direction of the y-axis is the direction towards the free end, and the positive direction of the x-axis is the direction towards the main slot; According to the formula x t2 = x t1 - K * cos(θ + A * t), y t2 = y t1 + K * sin(θ + A * t), the motion trajectory line of the secondary axis is obtained by fitting; where, x t1 = R * cos(A * t), y t1 = R * sin(A * t), (x t1 , y t1 ) is the axis center coordinate of the main axis, the interval of t is [0, 1], A is the opening angle of the door body when the main axis moves to the terminal position, R is the distance from the axis center of the main axis to the center of the main groove, K is the distance between the axis center of the main axis and the axis center of the secondary axis, and θ is the included angle between the connection line of the axis centers of the main axis and the secondary axis and the x-axis when the door body is in the closed state; The auxiliary slot is obtained according to the movement trajectory line and the auxiliary axis.

2. The method for obtaining the secondary groove in the hinge assembly according to claim 1, characterized in that: t = L1 / L, where L is the length of the main shaft trajectory line when the main shaft moves from the initial position to the terminal position, and L1 is the length of the main shaft moving from the initial position towards the terminal position at any moment during the process of the door body rotating and opening relative to the box body.

3. The method for obtaining the secondary groove in the hinge assembly according to claim 1 or 2, characterized in that: During the process of the main shaft moving from the initial position to the terminal position, the direction in which the hinge assembly drives the door body to translate has direction components in the positive direction of the y-axis and the negative direction of the x-axis.

4. The method for obtaining the secondary groove in the hinge assembly according to claim 3, characterized in that: The hinge assembly includes a hinge plate for fixing to the box body. The hinge plate includes a fixing portion for fixing to the box body and a horizontal plate connected to the fixing portion. The main slot and the auxiliary slot are both arranged on the horizontal plate, and the main shaft and the auxiliary shaft are arranged on the door body.

5. The method for obtaining the secondary groove in the hinge assembly according to claim 4, characterized in that: The auxiliary slot is located on the side of the main slot towards the free end, and the center of the main slot is located on the side of the main slot towards the pivot end; in the direction from the initial position towards the terminal position, the main slot extends towards the free end and towards the fixing portion.

6. A hinge assembly for movably connecting a door body to a box body. The hinge assembly includes a guiding shaft provided on one of the box body and the door body, and a guiding groove provided on the other of the box body and the door body. The guiding shaft includes a main shaft and a sub-shaft, and the guiding groove includes a main groove cooperating with the main shaft and a sub-groove cooperating with the sub-shaft. It is characterized in that: The auxiliary slot is obtained by the method for obtaining the auxiliary slot in any one of claims 1 to 5 of the hinge assembly.

7. The hinge assembly according to claim 6, wherein: The hinge assembly further includes a hinge plate for fixing to the box body. The hinge plate includes a fixing portion for fixing to the box body and a horizontal plate connected to the fixing portion. The main slot and the auxiliary slot both penetrate through the horizontal plate; The main shaft includes a first shaft section for cooperating with the door body, a second shaft section for cooperating with the main slot, and first limit members arranged at opposite ends of the second shaft section and respectively abutting against opposite sides of the horizontal plate; The auxiliary shaft includes a third shaft section for cooperating with the door body, a fourth shaft section for cooperating with the auxiliary slot, and second limit members arranged at opposite ends of the fourth shaft section and respectively abutting against opposite sides of the horizontal plate.

8. A refrigeration device, comprising a box body, a door body, and a hinge assembly for movably connecting the door body to the box body; characterized in that: The hinge assembly is the hinge assembly in any one of claims 6 to 7.

9. The refrigeration device according to claim 8, characterized in that: The guide slot is arranged on the box body, and the guide shaft is arranged on the door body; a first shaft sleeve for cooperating with the main shaft and a second shaft sleeve for cooperating with the auxiliary shaft are recessed on the door body.

10. The refrigeration device according to claim 8, characterized in that: The refrigeration device is an embedded refrigeration device.

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