Hinge assembly and electric appliance

Abstract

The utility model provides a hinge assembly and an electric appliance, the hinge assembly comprises a seat body and a body, a first kinematic pair and a second kinematic pair are formed between the seat body and the body, and under the constraint of the first kinematic pair and the second kinematic pair, the seat body and the body relatively translate in a plane perpendicular to a rotating shaft when relatively rotating. The electric appliance comprises a box body, a door body and a hinge assembly, the hinge assembly is connected with the box body and the door body, and the door body relatively translates when rotating relative to the box body. According to the utility model, through the two guide pieces and the rotating shafts respectively matched with the guide pieces, the synchronous sliding of the rotating shafts of the door body in the rotating opening process of the door body is realized, the problem of interference between the door body and the cabinet wall is avoided, and the effective opening angle of the door body is ensured and expanded. In addition, the opening and closing of the door body can be optimized by optimizing the position relation between the guide piece and the shaft of the hinge assembly of the upper edge and the lower edge of the electric appliance, so that the door body can be automatically closed within a certain range, the use experience of a user is optimized, and the possibility of energy consumption increase caused by potential errors is reduced.

Description

Technical Field

[0001] The utility model relates to the field of household appliances, in particular to a hinge assembly and an appliance. Background Art

[0002] At present, domestic users tend to buy embedded appliances when decorating their homes. They embed the appliances into the cabinets to integrate the appliances with the kitchen cabinets. This can provide a more beautiful home appearance and improve the utilization of indoor space. General appliances cannot be installed as embedded appliances because the door components of unoptimized appliances are not optimized for embedded environments. Most of them are single-axis hinges that are commonly seen. Figure 1 As shown, after the common single-axis hinge refrigerator on the market is embedded in the kitchen cabinet, when the door is opened to 90°, the door corner will extend beyond the kitchen cabinet. At the same time, when the door is opened from 90° to 110°, the door glass panel will collide with the kitchen cabinet, which limits the use of the refrigerator. To solve this problem, the manufacturer will require users to enlarge the size of the kitchen cabinet to avoid the above problems. However, due to the large gap between the kitchen cabinet and the refrigerator, it will affect the appearance of the home decoration on the one hand, and on the other hand, it will cause dust to enter and be difficult to clean. Basically, no matter where this single-axis hinge is installed, it is inevitable that the door assembly will invade the adjacent cabinet area during the opening and closing process, resulting in motion interference. Utility Model Content

[0003] In order to realize embedded installation of household appliances and avoid the problem of movement interference of the embedded appliances after installation, the utility model provides a hinge assembly and an appliance.

[0004] The technical solution of the present application provides a hinge assembly, comprising a hinge body and a hinge slot, wherein a first kinematic pair and a second kinematic pair are formed between the hinge body and the hinge slot;

[0005] The first kinematic pair includes a first guide and a first shaft sliding along the first guide, wherein either the first guide or the first shaft is disposed on the hinge body, and the other is disposed on the hinge slot;

[0006] The second kinematic pair comprises a second guide and a second shaft sliding along the second guide, wherein either the second guide or the second shaft is disposed on the hinge body, and the other is disposed on the hinge slot;

[0007] Under the constraints of the first kinematic pair and the second kinematic pair, the hinge body and the hinge slot body move relative to each other in a plane perpendicular to the rotation axis when they rotate relative to each other.

[0008] The technical solution of the present application further provides an electrical appliance, including a box body and a door body, characterized in that it also includes the aforementioned hinge assembly, the hinge body of the hinge assembly is fixed on the box body, and the hinge groove body is fixed on the door body; the hinge assembly connects the box body and the door body, and the door body moves relatively when rotating relative to the box body.

[0009] Preferably, the first guide member and the second guide member are both grooves extending along a preset trajectory, and the first shaft and the second shaft are both sliding shafts arranged in the corresponding grooves.

[0010] Preferably, when the door is closed, the first axis is located at a first starting end of the first guide member away from one end of the door side wall, and the second axis is located at a second starting end of the second guide member away from the front wall of the door side wall.

[0011] Preferably, when the door body is closed, the distance between the second axis and the side wall of the door body is always greater than the distance between the first axis and the side wall of the door body, and the distance between the second axis and the front wall of the door body is always less than the distance between the first axis and the front wall of the door body.

[0012] Preferably, the second guide member has an extended circular arc guide segment at the second starting end, and the center of the circular arc guide segment is located at the first starting end of the first guide member.

[0013] Preferably, the first guide member has a first curved segment and a second curved segment, and at least the tangent of the first curved segment and the second curved segment is continuous at the junction; the first curved segment is close to the first starting end, and the curvature radius of the first curved segment is greater than the curvature radius of the second curved segment;

[0014] The second guide member has a third curved segment and a fourth curved segment, and at least the tangent of the third curved segment and the fourth curved segment is continuous at the junction; the third curved segment is close to the second starting end, and the curvature radius of the third curved segment is greater than the curvature radius of the fourth curved segment.

[0015] Preferably, when the door body is opened from closed to the first angle, the first shaft moves along the first curved segment of the first guide member, moving in a direction close to the door side wall and away from the door front wall; the second shaft moves along the third curved segment of the second guide member, moving in a direction close to the door side wall and away from the door front wall;

[0016] When the door body is opened from the first angle to the maximum angle, the first axis moves along the second curved segment of the first guide member, moving toward the door side wall and the door front wall; the second axis moves along the fourth curved segment of the second guide member, moving toward the door side wall, and first moving away from and then approaching the door front wall relative to the door.

[0017] Preferably, the hinge assembly is coaxially arranged in two groups, one group is an upper edge hinge assembly arranged at the upper edge of the door body, and the other group is a lower edge hinge assembly arranged at the lower edge of the door body;

[0018] Compared with the lower edge hinge assembly, the upper edge hinge assembly at least partially deviates toward a side of the door body away from the side wall, so that the door body can close automatically when it is opened.

[0019] Preferably, the first guide member of the hinge assembly is divided by a first dividing point into a first initial guide section from a starting end to the first dividing point and a first terminal guide section from the first dividing point to a terminal end;

[0020] The second guide member of the hinge assembly is divided by a second dividing point into a second initial guide section from a starting end to the second dividing point and a second terminal guide section from the second dividing point to a terminal end;

[0021] The first initial guide section and the second initial guide section of the upper edge hinge assembly are respectively deviated toward a side of the door body away from the side wall relative to the first initial guide section and the second initial guide section of the lower edge hinge assembly;

[0022] The first end guide section and the second end guide section of the upper edge hinge assembly overlap with the projections of the first end guide section and the second end guide section of the lower edge hinge assembly, respectively.

[0023] The utility model has two guides and a rotating shaft respectively matched with each guide to realize the synchronous sliding of the rotating shaft of the door body during the process of rotating and opening, so that when the door body is installed in an embedded manner, it can avoid the problem of interference with the cabinet wall by translation in the plane when opening and closing, thereby ensuring and expanding the effective opening angle of the door body. The utility model can also optimize the opening and closing of the door body by changing the position relationship between the guide and the shaft of the hinge assembly at the upper and lower edges of the appliance, so that the door body can automatically close within a certain range, optimize the user experience, and reduce the possibility of increased energy consumption caused by potential errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of electrical installation in the prior art;

[0025] Figure 2 It is a schematic diagram of the opening and closing of the hinge assembly in the prior art;

[0026] Figure 3 It is a structural schematic diagram of the hinge assembly of the utility model;

[0027] Figure 4 It is a plan view of the hinge assembly of the utility model;

[0028] Figure 5It is a schematic diagram of installing a hinge assembly on an electrical appliance of the utility model;

[0029] Figure 6 This is one of the schematic diagrams of the relative movement between the hinge body 11 and the hinge slot 12 of the hinge assembly 1 of the present invention;

[0030] Figure 7 The second schematic diagram of the relative movement between the hinge body 11 and the hinge slot 12 of the hinge assembly 1 of the present invention;

[0031] Figure 8 A specific embodiment of a hinge assembly 1 and its installation on an electrical appliance;

[0032] Fig. 9 for Figure 7 A partial schematic diagram of the initial position of an embodiment of the present invention;

[0033] Fig.10 for Figure 8 An overall schematic diagram of an embodiment of the present invention on an electrical appliance;

[0034] Fig.11 is a schematic diagram of another embodiment of an electrical appliance such as a refrigerator having the hinge assembly 1;

[0035] Fig.12 It is a schematic diagram of another embodiment of an electrical appliance such as a refrigerator having the hinge assembly 1 .

[0036] In the figure: 1: hinge assembly; 11: hinge body; 12: hinge seat; A1: first axis; A2: second axis; B1: first guide member; B1: first initial guide section; B12: first terminal guide section; B13: first curved section; B14: second curved section; B2: second guide member; B21: second initial guide section; B2: second terminal guide section; B23: third curved section; B24: fourth curved section; C1: upper edge hinge assembly; C2: lower edge hinge assembly; M1: first dividing point; M2: second dividing point; P0: first starting end; Q0: second starting end; W1: door body; W2: box body; W3: cabinet wall; W4: single shaft; W5: rubber strip. DETAILED DESCRIPTION

[0037] The following is a detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. In this specification, the size ratios in the drawings do not represent the actual size ratios, but are only used to reflect the relative position relationship and connection relationship between the components. Components with the same name or the same number represent similar or identical structures and are only for illustrative purposes.

[0038] Figure 1This is a schematic diagram of the hinge structure of an existing household appliance with a single-axis door opening. The door body W1 rotates on the cabinet body W2 around the single rotation axis W4. When embedded installation is performed, the appliance (such as a refrigerator) is embedded in the cabinet body. In order to ensure the appearance, the appearance of the appliance and the cabinet body is basically the same, and there is usually almost no gap between them. Figure 2 As shown, this brings difficulty to the opening and closing of the door body W1. When the door body is slightly opened to a certain extent, the edge A of the door body W1 will interfere with the cabinet wall W3.

[0039] The technical solution of the utility model can solve the door opening interference problem of the above-mentioned embedded electrical appliances. Figure 3 The schematic diagram of the principle of the hinge assembly used in the present invention. The hinge assembly 1 generally includes two main parts, namely the hinge body 11 and the hinge slot 12 in the figure. For a common rotating shaft, the hinge body 11 and the hinge slot 12 only rotate around a single rotating shaft, but for the hinge assembly 1 in the present invention, the hinge body 11 and the hinge slot 12 not only rotate relative to each other around a certain direction, but also move horizontally on the mating surface at the same time, so that the hinge body 11 and the hinge slot 12 rotate and displace relative to each other at the same time, so that the door body W1 fixed on either of them can always not contact the cabinet wall W3 when it is rotated to open, thereby avoiding interference between the door body W1 and the cabinet wall W3.

[0040] Specifically, the hinge assembly 1 includes a first kinematic pair and a second kinematic pair. The first kinematic pair includes a first axis A1 and a first guide B1. One of the first axis A1 and the first guide B1 is arranged on the hinge body 11, and the corresponding other is arranged on the hinge slot 12, and the first guide B1 is used to guide the first axis A1 to move along the track specified by the first guide. The second kinematic pair of the hinge assembly 1 includes a second axis A2 and a second guide B2. One of the second axis A2 and the second guide B2 is arranged on the hinge body 11, and the corresponding other is arranged on the hinge slot 12, and the second guide B2 is used to guide the second axis A2 to move along the track specified by the second guide. When the door body is opened or closed, the door body rotates as a whole, the first axis A1 slides in the first guide B1, and the second axis A2 slides in the second end guide section B2. Obviously, the door body is displaced in the rotation plane and rotates around a non-fixed axis, which means that the first axis A1 and the second axis A2 are rotated together with the door body while sliding. Therefore, the first axis A1 and the second axis A2 should not be strictly connected to the first guide B1 and the second guide B2, but should have a certain degree of freedom of relative rotation. When the door body W1 is opened or closed, the first axis A1 and the second axis A2 move along their respective first guide B1 and the second guide B2, which makes the door body W1 perform a composite motion of translation and rotation relative to the box body W2 and the cabinet wall W3, so that the door body W1 does not contact the cabinet wall W3 during movement, avoiding interference problems. Figure 3 A structure of the hinge assembly 1 is shown. Figure 4 It is a schematic plan view of the hinge body 11 and the hinge base 12 in the hinge assembly 1 . Figure 5 A schematic diagram showing the installation of the hinge assembly 1 on an electrical appliance such as a refrigerator is shown ( Figure 5 A local).

[0041] Figure 3 , 4The schematic diagram shows that the first axis A1 and the second axis A2 are installed on the hinge body 11, and the first guide member B1 and the second guide member B2 are installed on the hinge slot body 12. The hinge slot body 12 can be installed on the door body W1, and the hinge body 11 can be installed on the box body W2. The first guide member B1 is the main hinge slot, and the first axis A1 is the main hinge shaft. The main hinge shaft is limited to slide in the main hinge slot. Since it is only limited in the main hinge slot, the main hinge shaft can not only slide under the guide of the main hinge slot, but also can rotate synchronously with the rotation of the door panel. The second guide member B2 is the guide slot, and the second axis A2 is the guide shaft. The guide shaft is limited to slide in the guide slot, and can rotate with the door panel similar to the main hinge shaft. When the door body W1 moves, as the opening degree of the door body W1 changes, the angle of the line between the first axis A1 and the second axis A2 changes, causing the first axis A1 and the second axis A2 to slide to corresponding positions in the first guide member B1 and the second guide member B2 respectively, that is, corresponding to the specific rotation angle of the door body W1, the hinge assembly 1 enables the door body W1 to translate to the corresponding position.

[0042] Figure 6 It is a schematic diagram of the relative movement between the hinge body 11 and the hinge slot body 12. In the scheme shown in the figure, the shaft is set on the door body, the guide is a groove extending along a certain track for accommodating the shaft, and the guide is set on the box body W2. In the closed state, the first axis A1 is located at one end of the first guide B1, and the second axis A2 is located at one end of the second guide B2 in the same direction. In the process of gradual opening, the first axis A1 and the second axis A2 continuously slide and rotate along the first guide B1 and the second guide B2 until they reach the other end of the first guide B1 and the second guide B2, completing a complete opening process. The reverse operation is a closing process. The local B and the local C in the figure are the local parts of the corners of the door body W1, and the tracks passed by the two in the opening and closing process are respectively shown in the figure using BL and CL. The two corners of the door body W1 close to the cabinet wall W3, respectively indicated by the local B and the local C, completely avoid the cabinet wall W3 in this process, thereby avoiding the interference problem when opening and closing the door body W1.

[0043] It should also be noted that for general electrical appliances such as refrigerators, the maximum door opening angle will exceed 90 degrees, and may reach 110 degrees to provide a better user experience of front access. Once the door opening angle is greater than 90 degrees, there is also the problem that the front panel of the door body W1 may interfere with the cabinet wall W3. Figure 7Schematic diagram, in a refrigerator using the hinge assembly 1, after the door W1 is opened to 90 degrees, the surface of one side of the panel gradually approaches the cabinet wall W3 as it continues to open. At this time, the first guide B1 and the second guide B2 of the hinge assembly 1 are arranged so that after more than 90 degrees, they continue to rotate away from the cabinet wall W3, avoiding interference and allowing the door W1 to have a larger opening angle. Figure 8 It is a specific embodiment of the hinge assembly 1. The end of the first guide member B1 (main hinge groove) away from the side wall W11 of the door body W1 is the first starting end P0. The end of the second guide member B2 (i.e., the guide groove) away from the door side wall W11 and close to the door front wall W12 is the second starting end Q0. When the door body is closed, the first axis A1 (i.e., the main hinge axis) is located at the first starting end P0, and the second axis A2 is located at the second starting end Q0. The distance between the guide axis and the door side wall W11 is always greater than the distance between the main hinge axis and the door side wall W11, and the distance between the guide axis and the door front wall W12 is always less than the distance between the main hinge axis and the door front wall W12.

[0044] When the door body is opened from closed to the first angle (Q2, P2 point), the first axis A1 moves along the first curved segment B13 of the first guide member B1, moving toward the door side wall W11 and away from the door front wall W12; the second axis A2 moves along the third curved segment B23 of the second guide member B2, moving toward the door side wall W11 and away from the door front wall W12;

[0045] When the door body opens from the first angle (Q2, point P2) to the maximum angle (Q5, point P5), when the door body opens from the first angle to the maximum angle, the first axis A1 moves along the second curved segment B14 of the first guide member B1, and moves toward the direction close to the door side wall W11 and close to the door front wall W12; the second axis A2 moves along the fourth curved segment B24 of the second guide member B2, and moves toward the door side wall W11, and the relative position with the door front wall W12 first moves away and then approaches.

[0046] in,

[0047] Point A1: When the door moves from P0 / Q0 to P1 / Q1, point A0 moves to point A1 accordingly. The door rotates by 6 degrees and the door moves 2mm laterally. At this time, the distance between point A1 and the cabinet is 2.6mm.

[0048] Point A2: When the door moves from P0 / Q0 to P2 / Q2, point A0 moves to point A2 accordingly. The door rotates at an angle of 53 degrees and the door moves 9mm laterally. At this time, the distance between point A2 and the cabinet is 0.1mm (the single-axis hinge door opens 4mm beyond the cabinet).

[0049] Point A3: When the door moves from P0 / Q0 to P3 / Q3, point A0 moves to point A3 accordingly. The door rotates 90 degrees and moves 10.5mm laterally. At this time, the door is parallel to the cabinet, and the distance between point A3 and the cabinet is 4.5mm.

[0050] Point A4: When the door moves from P0 / Q0 to P4 / Q4, point A0 moves to point A4 accordingly, the door rotates 110 degrees, the door moves 13mm laterally, and the distance between the door glass panel and the cabinet is 0.5mm. The maximum opening angle of the single-axis hinge is 98 degrees, and the opening angle increases by 12 degrees.

[0051] Fig. 9 The schematic diagram of the initial position of the embodiment is further described. The second guide member B2 has an extended arc guide segment B25 at the second starting end Q0, and the center of the arc guide segment B25 is located at the first starting end P0 of the first guide member B1. When the door body is in a closed state, the arc guide segment B25 is located in the extension direction of the normal trajectory of the second guide member B2, that is, the curve segment from P0' to P0. This segment of the trajectory curve is an arc, and its center is located at the end point Q0 of the initial position of the main hinge groove, and its radius is the distance between the guide axis and the main hinge axis. Therefore, when moving between P0 and P0', the door body W1 will only rotate with the Q0 point as the center, and there is no translation. The motion trajectory of the arc from P0' to P0 is very short, about 1-2 mm in this embodiment. Generally, the door body is closed at the first starting point P0 and the second starting point Q0, and the reserved arc guide section B25 is an optimized solution for effective closing and sealing. At this time, the existence of the arc guide section B25 means that if there are no other obstacles, the door body W1 can still rotate at a small angle with the second starting point Q0 as the axis. It should be noted that the closed position of the door body W1 is still P0 and Q0 points under normal circumstances, rather than P0' and Q0 points. However, the above arc trajectory is still preferred, and you can refer to Fig.10, when the door body W1 is installed on the box body W2, the contact surface between the two is often sealed by the rubber strip W5, and in order to ensure the sealing, the two may also be attracted by magnetic force in the closed state. In order to ensure a good seal, it is best to provide a small margin for the door body W1 in the closed position to absorb the assembly error or the error caused by other circumstances, so that the rubber strip W5 can be reliably attracted and pressed between the gap between the two to ensure the sealing. The arc design at P0'P0 is very helpful to improve the adaptability of the rubber strip and ensure reliable sealing under any circumstances. Theoretically, P0'P0 does not work when the door body W1 is opened and closed, and the second axis A2 will not enter the P0'P0 section of the second guide B2 under normal circumstances. In fact, if due to installation errors and other problems, the door body W1 may not be reliably closed at P0, or the rubber strip may not be deformed enough between the door body and the box body, which may lead to poor sealing. The additional P0'P0 section of the second guide B2 can improve this problem. It provides margin for the door body W1 to continue to close to the box body W2, ensuring that the door body W1 can completely press the rubber strip W5 under the action of magnetic attraction and the like. The arc of the P0'P0 section is also preferred. At this time, the door body W1 only needs to rotate around Q0. Compared with the door body W1 being forced to perform a composite motion of translation and rotation during the P0-P5 process by the first guide B1 and the second guide B2, the resistance to rotating only around Q0 is very small. If the door body W1 is close to the box body W2, the magnetic attraction or other force can naturally press the door body W1 against the box body W2 to ensure a reliable seal between the two.

[0052] Fig.11It is a schematic diagram of another embodiment of an appliance such as a refrigerator having the hinge assembly 1. Regardless of whether it is a single-axis hinge or a hinge with multiple axes of the utility model, in order to ensure normal use, at least two sets of coaxial use are required. The same is true for the hinge of the utility model installed on an appliance such as a refrigerator. Generally, it is necessary to set a set of hinge assemblies 1 at the upper edge and the lower edge of the door body W1, and the movement planes of the two sets of hinge assemblies are parallel and basically overlap in the vertical direction. In order to simply realize the automatic closing of the door body W1, the hinge assemblies 1 respectively arranged at the upper edge and the lower edge form a small angle with the vertical direction in the initial plane of the door body W1 closing. This is achieved by the inconsistent distance between the upper edge hinge assembly C1 and the side wall closer to the door body W1 relative to the lower edge hinge assembly C2. Compared with the lower edge hinge assembly C2, the upper edge hinge assembly C1 deviates as a whole to the side of the door body W1 away from the side wall W11. The distance between the upper hinge assembly C1 and the side wall L1 is slightly greater than the distance L2 between the lower hinge assembly C2 and the side wall by L3 = 1-3 mm (1-3 mm offset to the closing side in the initial closing plane). This causes the rotating shaft of the door body W1 to slightly deflect to the closing side in the closing plane. Under the action of the deadweight of the door body W1, no matter where the door body is opened, it will automatically rotate to the closed state under the action of its deadweight without external force.

[0053] Fig.12 It is a schematic diagram of another embodiment of the appliance. The door body W1 is still movably mounted on the box body W2 through the upper hinge assembly C1 and the lower hinge assembly C2. The installation positions of the upper hinge assembly C1 and the lower hinge assembly C2 are basically overlapped in the vertical projection. The difference is that the specific trajectory designs of the first guide member B1 and the second guide member B2 of the two are slightly different to achieve segmented control of the movement of the door body W1. Fig.11 The technical solution of installing the first guide member B1 and the second guide member B2 on the door body W1 is used as an example. In the closed state, the first axis A1 is located at the starting end B1S of the first guide member B1, and the second axis A2 is located at the starting end B2S of the second guide member B2. In the state of opening to the maximum angle, the first axis A1 is located at the end B2E of the first guide member B1, and the second axis A2 is located at the end B2E of the second guide member B2. There are a dividing point M1 and M2 in the middle of each of the first guide member B1 and the second guide member B2, which divide the two guide members into two guide sections. For the first guide member B1, it has a first initial guide section B11 extending from the starting end B1S to the first dividing point M1 in the middle and a first terminal guide section B12 extending from the second dividing point M1 in the middle to its end. Correspondingly, for the second guide member B2, it has a second initial guide section B21 and a second terminal guide section B22, and the connection order of the two sections is the same as that of the first guide member B1.

[0054] For the first guide member B1 and the second guide member B2, the first end guide section B12 and the second end guide section B22 of the two are exactly the same and the projections overlap, which means that when the door body W1 rotates to the first axis A1 and the second axis A2 respectively enter the first end guide section B12 and the second end guide section B22, the direction of its rotating axis remains fixed. If the appliance is installed as a whole in a generally vertical direction, when the door body W1 moves in this section, the door body W1 makes a planar motion in the horizontal plane, and the center of gravity height remains unchanged. It can stay at any position in between and will not be affected by gravity. As for the first initial guide section B11 and the second initial guide section B21, the first initial guide section B1 of the upper edge hinge assembly C1 as a whole gradually deviates from the side of the door body W1 away from the side wall relative to the second initial guide section B21 of the lower edge hinge assembly C2, which means that when the door body W1 moves in this section, its upper part is inclined toward the side away from the rotating shaft pointed to by the door body plane in the closed state. In the process from the initial closed position to the opening to the split points M1 and M2, the center of gravity of the door body W1 rises due to the slight tilt of the rotating shaft relative to the vertical direction. Therefore, when the user lets go and loses external force, the door body W1 can close automatically, and when closing, it is closed and sealed by the magnetic attraction or the like. The door body W1 opens until the first axis A1 is located at the first split point M1, and at the same time, the second axis A2 is located at the second split point M2. The specific positions of the first dividing point M1 and the second dividing point M2 can be determined according to the desired angle range of the door body W1 to close automatically. For example, in the present technical solution, it is hoped that the door body can close automatically when the user opens the door body W1 to within 60 degrees. Therefore, the angle between M1M2 and P0Q0 should not be less than 60 degrees. In addition, for the smooth operation of the door body, the working section P0P5 of the first guide member B1 and the working section Q0Q5 of the second guide member B2 are both tangent continuous. Therefore, the first initial guide section B11 is tangent to the first terminal guide section B12 at the first dividing point M1, and the second initial guide section B21 is tangent to the second dividing point M2. This means that when the door body W1 is opened from the initial closed state of P0Q0 to the angle of M1M2, its axis of rotation will gradually become vertical. In order to ensure reliable operation and self-closing, the actual angle between M1M2 and P0Q0 will be greater than the maximum value of the expected angle range of 10-20 degrees, that is, if the door body W1 can close itself within the required 60 degrees, then the angle α between M1M2 and P0Q0 is about 70-80 degrees. It is more appropriate. This can not only optimize the user experience, but also avoid the increase in power consumption in unexpected situations. Because, in daily situations, the door body W1 may only be half-closed but not closed correctly due to the user's careless operation, which will cause the problem of increased power consumption. The technical solution of the utility model realizes the function of automatic closing, which can avoid the occurrence of similar problems.

[0055] The above content is only a description of the preferred implementation mode of the utility model, and does not limit the scope of the utility model. Without departing from the design spirit of the utility model, various modifications and improvements made to the technical solution of the utility model by ordinary technicians in this field should fall within the protection scope determined by the claims of the utility model.

Claims

1. A hinge assembly, characterized in that: It comprises a hinge body (11) and a hinge slot body (12), wherein a first kinematic pair and a second kinematic pair are formed between the hinge body (11) and the hinge slot body (12); The first kinematic pair comprises a first guide member (B1) and a first axis (A1) sliding along the first guide member (B1), wherein either the first guide member (B1) or the first axis (A1) is arranged on the hinge body (11), and the other is arranged on the hinge slot (12); The second kinematic pair comprises a second guide member (B2) and a second axis (A2) sliding along the second guide member (B2), wherein either the second guide member (B2) or the second axis (A2) is arranged on the hinge body (11), and the other is arranged on the hinge slot (12); Under the constraints of the first kinematic pair and the second kinematic pair, the hinge body (11) and the hinge slot body (12) move relative to each other in a plane perpendicular to the rotation axis when they rotate relative to each other.

2. An electrical appliance, comprising a box (W2) and a door (W1), characterized in that: It also includes the hinge assembly as described in claim 1, wherein the hinge body (11) of the hinge assembly is fixed on the box body (W2), and the hinge groove body (12) is fixed on the door body (W1); the hinge assembly connects the box body (W2) and the door body (W1), and the door body (W1) moves relatively when rotating relative to the box body (W2).

3. The electrical appliance according to claim 2, characterized in that The first guide member (B1) and the second guide member (B2) are both grooves extending along a preset track, and the first axis (A1) and the second axis (A2) are both sliding axes arranged in the corresponding grooves.

4. The electrical appliance according to claim 2, characterized in that When the door body (W1) is closed, the first axis (A1) is located at a first starting end (P0) of the first guide member (B1) away from one end of the side wall (W11) of the door body (W1), and the second axis (A2) is located at a second starting end (Q0) of the second guide member (B2) away from the front wall (W12) of the side wall (W11) of the door body (W1).

5. The electrical appliance according to claim 4, characterized in that When the door body (W1) is closed, the distance between the second axis (A2) and the side wall (W11) of the door body (W1) is always greater than the distance between the first axis (A1) and the side wall (W11) of the door body (W1), and the distance between the second axis (A2) and the front wall (W12) of the door body (W1) is always less than the distance between the first axis (A1) and the front wall (W12) of the door body (W1).

6. The electrical appliance according to claim 4, characterized in that The second guide member (B2) has an extended circular arc guide section at the second starting end (Q0), and the center of the circular arc guide section is located at the first starting end (P0) of the first guide member (B1).

7. The electrical appliance according to claim 4, characterized in that The first guide member (B1) has a first curved segment (B13) and a second curved segment (B14), and at least a tangent line of the first curved segment (B13) and the second curved segment (B14) is continuous at the junction; the first curved segment (B13) is close to the first starting end (P0), and a curvature radius of the first curved segment (B13) is greater than a curvature radius of the second curved segment (B14); The second guide member (B2) has a third curved segment (B23) and a fourth curved segment (B24), and at least the tangent of the third curved segment (B23) and the fourth curved segment (B24) are continuous at the junction; the third curved segment (B23) is close to the second starting end (Q0), and the curvature radius of the third curved segment (B23) is greater than the curvature radius of the fourth curved segment (B24).

8. The electrical appliance according to claim 7, characterized in that When the door body (W1) is opened from closed to a first angle, the first axis (A1) moves along the first curved segment (B13) of the first guide member (B1) in a direction close to the door side wall (W11) and away from the door front wall (W12); the second axis (A2) moves along the third curved segment (B23) of the second guide member (B2) in a direction close to the door side wall (W11) and away from the door front wall (W12); When the door body is opened from the first angle to the maximum angle, the first axis (A1) moves along the second curved segment (B14) of the first guide member (B1), moving toward the door side wall (W11) and the door front wall (W12); the second axis (A2) moves along the fourth curved segment (B24) of the second guide member (B2), moving toward the door side wall (W11), and its relative position with the door front wall (W12) first moves away and then approaches.

9. The electrical appliance according to claim 2, characterized in that: The hinge assembly (1) is coaxially arranged in two groups, one group is an upper edge hinge assembly (C1) arranged at the upper edge of the door body (W1), and the other group is a lower edge hinge assembly (C2) arranged at the lower edge of the door body (W1); Compared with the lower edge hinge assembly (C2), the upper edge hinge assembly (C1) at least partially deviates toward a side of the door body (W1) away from the side wall (W11), so that the door body (W1) can close automatically when opened.

10. The electrical appliance according to claim 9, characterized in that The first guide member (B1) of the hinge assembly (1) is divided by a first dividing point (M1) into a first initial guide section (B11) from a starting end to the first dividing point (M1) and a first terminal guide section (B12) from the first dividing point (M1) to a terminal end; The second guide member (B2) of the hinge assembly (1) is divided by a second dividing point (M2) into a second initial guide section (B21) from a starting end to the second dividing point (M2) and a second terminal guide section (B22) from the second dividing point (M2) to a terminal end; The first initial guide section (B11) and the second initial guide section (B21) of the upper edge hinge assembly (C1) are respectively offset toward a side of the door body (W1) away from the side wall relative to the first initial guide section (B11) and the second initial guide section (B21) of the lower edge hinge assembly (C2); The first end guide section (B12) and the second end guide section (B22) of the upper edge hinge assembly (C1) overlap with the projections of the first end guide section (B12) and the second end guide section (B22) of the lower edge hinge assembly (C2).

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