Household appliance

Abstract

A household appliance includes: a housing defining a chamber; the door is hinged to the front portion of the box body, and the door can rotate around a first shaft so as to open or close the cavity; the driving mechanism is arranged on the box body, the driving mechanism is used for driving the door to rotate around a second shaft, a non-zero included angle is formed between the second shaft and the first shaft, and the door further rotates around the first shaft to open or close the cavity along with rotation of the door around the second shaft. According to the scheme, automatic door opening and closing are achieved through the gravity center change of the door, the use convenience of a user is improved, the requirement for the power of the driving mechanism is further low, and cost reduction and overall energy consumption reduction are facilitated.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of household appliances, and in particular to a household appliance. Background Art

[0002] With the advancement of technology and the improvement of users' living standards, people have higher and higher requirements and expectations for home appliances, such as intelligence, ease of operation, energy saving and environmental protection. Take the automatic door opening and closing function as an example. For home appliances with door bodies, users could only manually operate the door bodies to complete the door opening and closing action. Recently, home appliances with automatic door opening and closing functions have begun to appear on the market, in order to free users' hands and improve user convenience.

[0003] The existing automatic door opening and closing scheme mainly sets a drive motor at the door hinge, and cooperates with a gear set to directly drive the hinge to rotate so as to realize the door opening and closing. There are many problems with this implementation method: 1. The drive motor needs to output a large torque to realize the rotation of the door, and the power requirement of the drive motor is high, resulting in a relatively high energy consumption and cost of the whole machine; 2. In the case of power failure, the drive motor connected to the hinge cannot work, and the user cannot manually open and close the door, which affects the user's convenience; 3. The automatic door opening and closing system composed of the drive motor and the gear set has a complex structure and a high failure rate. Once this system fails, the hinge will be locked, and the user will not be able to use the household appliance normally.

[0004] In summary, the existing automatic door opening and closing solutions cannot truly meet the relevant needs, whether from the perspective of improving user convenience or from the perspective of energy saving and environmental protection. Summary of the invention

[0005] An object of an embodiment of the present invention is to provide an improved household appliance.

[0006] Therefore, an embodiment of the present invention provides a household appliance, comprising: a housing defining a chamber; a door hinged at the front of the housing, the door being rotatable around a first axis to open or close the chamber; and a driving mechanism disposed on the housing, the driving mechanism being used to drive the door to rotate around a second axis, wherein the second axis and the first axis have a non-zero angle, and as the door rotates around the second axis, the door also rotates around the first axis to open or close the chamber.

[0007] In the existing household appliances, the driving motor directly acts on the hinge, and the door is opened and closed by driving the hinge to rotate around the hinge axis. Since the rotating axis of the door driven by the driving motor is the hinge axis, the output torque of the driving motor is required to support the whole process of the door opening and closing, and the power requirement of the driving motor is high, resulting in a relatively increased energy consumption and cost of the whole machine. In comparison, the present embodiment utilizes the change of the center of gravity of the door itself, and only a low-power driving mechanism is required to realize the automatic opening and closing of the door, which improves the user's convenience on the one hand, and has low cost and low energy consumption of the whole machine on the other hand. Specifically, the hinge axis between the door and the box is separated from the rotating axis of the door driven by the driving mechanism, wherein the former is the first axis and the latter is the second axis. The separation of the two axes enables the output torque of the driving mechanism to be decoupled from the opening and closing of the hinge, and the driving force of the driving mechanism does not directly act on the opening and closing process of the door. Further, by making a non-zero angle between the second axis and the first axis, the driving mechanism only needs a small torque to realize the change of the flip angle of the door, for example, in the direction of gravity, so that the center of gravity of the door is offset, thereby driving the change of the opening and closing state of the door. Thus, the driving mechanism is responsible for driving the door to change its flipping angle, and does not need to drive the door to open and close, so only a relatively low-power motor is needed to achieve this function, which is low-cost. Furthermore, since a low-power motor is used, the energy consumption of the household appliance is also reduced.

[0008] Furthermore, through the cooperation of the first axis and the second axis, the door can be opened automatically, opened and maintained at a fixed door opening angle, and closed automatically. Thus, the convenience of use for users is further improved. The fixed door opening angle can be, for example, 90° relative to the box body, so that the door is maintained at a fixed door opening angle that exposes the chamber to the greatest extent, making it convenient for users to take and put items in the chamber.

[0009] Furthermore, the driving force of the driving mechanism does not directly act on the door opening and closing process, and the door opening and closing is not restricted by the driving mechanism. Therefore, in the case of power failure, even if the driving motor cannot work, the connection between the door and the box body and the opening and closing process can still be achieved through the hinge, and the user can still manually open and close the door. This further improves the user's convenience.

[0010] Furthermore, the driving mechanism can realize the driving door to rotate around the second axis without complicated structural design, and the whole system has a simple structure and high reliability. Even if the whole system fails, the user can still open and close the door manually without affecting the use of the whole machine.

[0011] Furthermore, by controlling the door to rotate around the second axis to achieve different flipping angles through the drive mechanism, the center of gravity position of the door can be adjusted to achieve the automatic opening and closing angle of the door. For example, the motor can rotate at different angles to flip the door to different states, and different angles of automatic door opening and closing can be achieved by adjusting the different center of gravity positions of the door.

[0012] Optionally, the first axis is perpendicular to the second axis, and / or the second axis is parallel to the width direction of the household appliance. Thus, under the action of the driving mechanism, the door flips outward or inward relative to the box body around the second axis, and as the door flips, its own center of gravity shifts, so that the door naturally rotates around the first axis under the action of gravity to open or close the chamber. Furthermore, the second axis is perpendicular to the first axis, and the driving force of the driving mechanism acts on the door to flip it outward or inward with almost no component loss, which is conducive to further reducing the power requirements of the driving mechanism.

[0013] Optionally, the extension direction of the first axis changes as the door rotates around the second axis. Thus, the door can rotate around the first axis synchronously during the rotation around the second axis, thereby realizing automatic opening and closing of the door.

[0014] Optionally, when the door is in the first position closing the chamber, the first axis is parallel to the direction of gravity. Thus, the direction of gravity of the door in the first position and the hinge are in the same vertical plane, and the hinge of the door maintains force balance, ensuring that the door is reliably maintained in the first position closing the chamber. Furthermore, when the door closes the chamber, there is basically no obvious concave or convex structure on the front of the household appliance, and the appearance is more beautiful.

[0015] Optionally, when the door is in the first position closing the chamber, the first axis and the gravity direction have a non-zero angle and the lower end of the door is located in front of the upper end of the door. Thus, the door in the first position fits more closely to the chamber under the action of gravity, which may be beneficial for improving the sealing performance of the chamber. Furthermore, the chamber opens obliquely upward, which is more convenient for users to take and put items.

[0016] Optionally, when the door is in the second position for opening the chamber, the first axis and the direction of gravity have a non-zero angle, and the first axis extends forward and upward from the intersection with the direction of gravity. As a result, the first axis turns outward around the second axis synchronously with the door, and the force balance at the hinge of the door is broken, thereby realizing the automatic door opening function. Specifically, at this time, relative to the hinge connecting the door and the box body, the center of gravity of the door and the hinge are not on the same force plane in the vertical direction, and the gravity of the door has an outward decomposition force, which causes the door to spontaneously rotate around the first axis to the second position to complete the door opening action.

[0017] Optionally, when the door is in the second position for opening the chamber, the plane where the door is located is parallel to the depth direction of the household appliance. Thus, under the action of gravity, the door moves naturally and remains at the maximum opening angle, making it convenient for users to take and put items.

[0018] Optionally, during the movement of the door from the first position closing the chamber to the second position opening the chamber, the angle at which the door rotates around the first axis is in the range of [80°, 100°]. Thus, the angle at which the door rotates around the first axis is large enough to expose as many chambers as possible for users to take in and put in items. Furthermore, the door in the first position may not be completely perpendicular to the depth direction of the household appliance, that is, the opening of the chamber may be slightly tilted toward the left or right side of the household appliance. This design is conducive to making the opening of the chamber face more toward the user when the household appliance is placed in a corner, further facilitating the user to take in and put in items.

[0019] Optionally, the household appliance further comprises: a first hinge and a second hinge which are hinged to each other, the first hinge being arranged on the door, the second hinge being arranged on the box, and the driving mechanism being used to drive the second hinge to rotate around the second axis. Thus, the driving mechanism acts on the second hinge on the box, and drives the second hinge to rotate, driving the door to turn inward or outward, thereby realizing automatic opening and closing of the door by utilizing the gravity of the door itself.

[0020] Optionally, when the door is in the first position closing the chamber, the first hinge is perpendicular to the second hinge; and / or, when the door is in the second position opening the chamber, the first hinge is parallel to the second hinge. Thus, as the second hinge is turned outward or inward by the driving mechanism, the first hinge hinged to the second hinge rotates relative to the second hinge around the hinge axis (i.e., the first axis) while keeping the synchronization with the second hinge in the process of turning outward or inward, and the rotation process is the process of opening or closing the door, thereby realizing the automatic opening and closing function of the door.

[0021] Optionally, the driving mechanism includes: a driving motor, which is arranged in the box, and the output shaft of the driving motor is connected to the second hinge. Thus, the hinge cooperates with the structure of the driving motor, and the door is driven to change its angle in the vertical direction through the rotation of the driving motor, and the door is automatically opened and closed through the change of the center of gravity. Furthermore, since the output torque of the driving motor acts on the second hinge instead of the first hinge or the hinge axis of the two hinges, the door opening and closing function can still be manually realized, thereby ensuring that the machine is not affected when the driving motor has problems.

[0022] Optionally, the household appliance further comprises: a limiting portion, arranged on the box body; and a matching portion, arranged on the second hinge, the matching portion being used to cooperate with the limiting portion to limit the maximum rotation angle of the second hinge around the second axis. Thus, the maximum degree of the door turning outward or inward under the action of the driving mechanism can be limited, thereby preventing the door from being damaged by collision due to excessive turning outward or inward.

[0023] Optionally, the mating portion includes a limiting groove, and the limiting portion includes a limiting pin shaft, and the limiting pin shaft moves in the limiting groove during the rotation of the second hinge around the second axis. Thus, the rotation positioning of the drive motor is achieved through the limitation of the mechanical mechanism. By limiting the rotation angle of the drive motor within a reasonable numerical range, it is helpful to reasonably control the maximum extent to which the door can be turned outward or inward, and avoid damage caused by collision due to excessive turning outward or inward of the door. Furthermore, the above-mentioned mechanical mechanism is also helpful to improve the fixing firmness of the drive mechanism and the second hinge, and has a simple structure and high reliability.

[0024] Optionally, the limit groove extends in an arc shape, and the circle to which the arc belongs takes the second axis as the center; and / or the length of the limit groove along the extension direction is positively correlated with the speed at which the door opens or closes the chamber. Thus, by reasonably designing the length of the arc, the speed at which the door automatically opens or closes can be controlled to meet user needs. Specifically, the longer the length of the arc, the more the center of gravity shifts when the door rotates around the second axis, and the faster the door automatically opens or closes.

[0025] Optionally, the household appliance further comprises: a lock part and a coupling part, one of which is arranged on the housing, and the other is arranged on the door, the lock part and the coupling part can switch between a locked state and a decoupled state, the lock part and the coupling part are in the locked state during the period when the door closes the chamber, and are switched to the decoupled state at least when the door rotates around the second axis or before the rotation. Thus, through the cooperation of the lock part and the coupling part, it is ensured that the door reliably closes the chamber when the door is in the first position, and it is ensured that the door can move freely when the automatic door opening and closing function is required.

[0026] Optionally, the connection state between the lock part and the coupling part is automatically switched according to the position of the door relative to the box body. Thus, the freedom of movement of the door relative to the box body can be automatically adjusted without the user having to perform additional operations or issue instructions, which is conducive to improving the intelligence of household appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a household appliance in a state where the door of the household appliance is closed according to an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A schematic diagram of the household appliance shown in the chamber state with the door open;

[0029] Figure 3 yes Figure 1 Schematic diagram of the hinge between the middle door and the box body;

[0030] Figure 4 yes Figure 3 a top view of the structure shown;

[0031] Figure 5 It is a schematic diagram of the hinge between the door and the box during the door opening process;

[0032] Figure 6 yes Figure 5 a top view of the structure shown;

[0033] Figure 7 yes Figure 5 Schematic diagram of the door's posture in the state shown;

[0034] Figure 8 It is a schematic diagram of the hinge between the door and the box during the door closing process;

[0035] Fig. 9 yes Figure 8 a top view of the structure shown;

[0036] Fig.10 yes Figure 8 Schematic diagram of the door's posture in the state shown;

[0037] Fig.11 It is a diagram of the door position changes during the process of opening and closing the door;

[0038] Fig.12 yes Figure 3 Cross-sectional view along AA direction;

[0039] In the attached figure:

[0040] 100-household appliance; 10-housing; 101-chamber; 102-second hinge; 11-door; 111-first hinge; 12-first axis; 13-second axis; 2-driving mechanism; 21-driving motor; 211-output shaft; 212-motor sleeve; 22-ball bearing; 3-limiting part; 31-limiting pin; 4-matching part; 41-limiting groove; 5-locking part; x-width direction of household appliance; y-depth direction of household appliance; z-height direction of household appliance; g-gravity; g1, g2-decomposition force; r1-opening direction of door; r2-closing direction of door. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] Figure 1 1 is a schematic diagram of a household appliance 100 in a state where a door 11 closes a chamber 101 according to an embodiment of the present invention. Figure 2 yes Figure 1 The household appliance 100 is shown in a schematic diagram when the door 11 opens the chamber 101 .

[0043] To more clearly illustrate the technical features of this embodiment, Figure 1and Figure 2 The door 11 of the household appliance 100 and its hinge with the box 10 are mainly exemplarily shown, and the specific connection structure between the door 11 and the box 10 is further described in conjunction with the accompanying drawings. In the accompanying drawings, other possible components in the box 10 are simplified or omitted. In order to more clearly show the aforementioned specific connection structure, the partial structure of the door 11 located in the box 10 is not dotted in the accompanying drawings.

[0044] The home appliance 100 may include a washing machine, a dryer, a washer-dryer, etc., and may also include powered household appliances such as a refrigerator and a wardrobe that require doors to be opened and closed.

[0045] For ease of description, in this embodiment, the width direction of the household appliance 100 is recorded as the x direction, the depth direction is recorded as the y direction, and the height direction is recorded as the z direction. In this embodiment, the front-to-back direction refers to the y direction and the opposite direction thereof, wherein the front or the front side refers to the direction facing the user when the household appliance 100 is in use, and the rear or the rear side refers to the direction away from the user when the household appliance 100 is in use. In this embodiment, the up-down direction refers to the z direction and the opposite direction thereof, wherein the top or the upper side refers to the direction close to the user's head when the household appliance 100 is in use, and the bottom or the lower side refers to the direction close to the user's feet when the household appliance 100 is in use.

[0046] Specifically, refer to Figure 1 and Figure 2 The household appliance 100 may include a housing 10, which defines a chamber 101. Taking a washing machine as an example, the chamber 101 may be in a cylindrical shape, for example, for accommodating clothes to be washed. The chamber 101 may be open to the front for a user to put items into the chamber 101 or take items out of the chamber 101.

[0047] Further reference Figure 1 and Figure 2 The household appliance 100 may further include a door 11, which is hinged to the front of the housing 10, and the door 11 may rotate around a first axis 12 to open or close the chamber 101. For example, the door 11 and the housing 10 may be connected by a hinge, and accordingly, the first axis 12 may be, for example, or parallel to a hinge axis of the hinge.

[0048] Further, in this embodiment, the extension direction of the first axis 12 can be dynamically changed. Figure 1 When the door 11 is in the first position of the closed chamber 101 as shown, the extension direction of the first axis 12 can be parallel to the z direction. Figure 2 When the chamber 101 is opened in the second position, the extension direction of the first axis 12 and the z-direction may have a non-zero angle. Specifically, at this time, the first axis 12 may extend forward and upward compared to the z-direction.

[0049] In some embodiments, the household appliance 100 may further include a first hinge 111 and a second hinge 102 that are hinged to each other, wherein the first hinge 111 is disposed on the door 11, and the second hinge 102 is disposed on the housing 10. Accordingly, the first axis 12 may be equivalent to a hinge axis of the first hinge 111 and the second hinge 102. For example, the first hinge 111 may be fixed to a side of the door 11 facing the housing 10, and the second hinge 102 may be disposed on a side wall of the chamber 101 that is suitable for forming an opening.

[0050] In one specific implementation, reference Figures 1 to 10 The household appliance 100 may further include a driving mechanism 2 disposed in the housing 10, and the driving mechanism 2 is used to drive the door 11 to rotate around the second axis 13. The second axis 13 and the first axis 12 have a non-zero angle, and as the door 11 rotates around the second axis 13, the door 11 also rotates around the first axis 12 to open or close the chamber 101.

[0051] Specifically, the extension direction of the second axis 13 is suitable for causing the extension direction of the first axis 12 to generate a component in the depth direction (e.g., y direction) of the household appliance 100 during the rotation of the door 11 around the second axis 13, so as to cause the center of gravity of the door 11 to shift forward or backward. The forward direction (also referred to as outward direction) refers to a direction away from the cabinet 10, and the backward direction (also referred to as inward direction) refers to a direction close to the cabinet 10.

[0052] Furthermore, the extension direction of the first axis 12 changes as the door 11 rotates around the second axis 13. That is, during the movement of the door 11 between the first position and the second position, the angle between the first axis 12 and the second axis 13 remains unchanged. As a result, the door 11 can rotate around the first axis 12 synchronously while rotating around the second axis 13, thereby realizing the automatic opening and closing of the door 11.

[0053] For example, the second axis 13 may be parallel to the width direction (e.g., x direction) of the household appliance 100, and accordingly, the rotation of the door 11 around the second axis 13 may be regarded as flipping outward (i.e., forward) or inward (i.e., backward) relative to the housing 10 in the vertical direction. During the rotation of the door 11 around the second axis 13, the hinge axes of the door 11 and the housing 10 (e.g., the hinge axes of the first hinge 111 and the second hinge 102, which define the extension direction of the first axis 12) rotate synchronously around the second axis 13, and the angle between the extension direction of the first axis 12 and the z direction continues to increase. Since the z direction represents the direction of gravity of the door 11, as the door 11 rotates around the second axis 13, the center of gravity of the door 11 shifts, and the force balance at the hinge of the door 11 is broken, thereby realizing the automatic opening and closing action of the door 11.

[0054] In a typical application scenario, continue to refer to Figures 1 to 10The driving mechanism 2 may include a driving motor 21 , and an output shaft 211 of the driving motor 21 may be parallel to the second axis 13 , that is, parallel to the x direction.

[0055] refer to Figures 5 to 7 , door 11 is as follows Figure 1 In the closed state shown (ie, in the first position), the first hinge 111 and the second hinge 102 are in the Figure 3 and Figure 4 The driving motor 21 rotates outward (for example, by pressing Figure 5 The door 11 will turn outwards if the angle of view shown in the figure is rotated clockwise to a certain angle. At this time, the force balance at the hinge of the door 11 will be broken, and the center of gravity of the door 11 and the hinge are not on the same force plane in the vertical direction. At this time, the door 11 is relative to the first axis 12 ( Figure 7 The gravity of door 11 ( Figure 7 There will be an outward decomposition force ( Figure 7 The decomposition force g1 will realize the automatic door opening function of the door 11. At this time, the door 11 is opened under the action of gravity. Fig.11 The door 11 automatically rotates from the first position to the second position around the first axis 12 in the direction indicated by the middle arrow r1, completing the automatic opening of the door 11.

[0056] When the door 11 rotates about the first axis 12 by about 90 degrees, it moves to the position as shown in FIG. Figure 2 During the shown second position, the direction of gravity of the door 11 can be in the same vertical plane as the hinge. At this moment, the outward decomposition force of the door 11 disappears, the door opening state stops, and the door 11 remains in the door opening 90 degree state.

[0057] Further, the door 11 is in a Figure 2 After the door is opened at 90° as shown, the drive motor 21 can rotate in the reverse direction (ie, inwardly) to return the first hinge 111, the second hinge 102 and the door 11 to the position shown in FIG. Figure 3 At this time, the extension direction of the first axis 12 returns to being parallel to the z direction.

[0058] When the door 11 is closed, the drive motor 21 rotates inward (for example, by pressing Figure 8 The door 11 will turn inwards if the angle of view shown in the figure is rotated counterclockwise to a certain angle. At this time, the force balance at the hinge of the door 11 is broken again, and the center of gravity of the door 11 and the hinge are not on the same force plane in the vertical direction. At this time, the door 11 is relative to the first axis 12 ( Fig.10 The gravity of door 11 ( Fig.10 There will be an inward decomposition force ( Fig.10The decomposition force g1 will realize the automatic closing function of the door 11. At this time, the door 11 is under the action of gravity. Fig.11 The door 11 automatically rotates from the second position to the first position around the first axis 12 in the direction indicated by the middle arrow r2, completing the automatic closing of the door 11.

[0059] When the door 11 rotates about the first axis 12 by about 90° to return to the Figure 1 After the first position is reached, the drive mechanism 21 can rotate in the opposite direction (ie, rotate outward) to return the first hinge 111, the second hinge 102 and the door 11 to the first position shown in FIG. Figure 3 At this time, the extension direction of the first axis 12 returns to be parallel to the z direction, as shown in FIG. Figure 1 shown.

[0060] Therefore, under the action of the driving mechanism 2, the door 11 flips outward or inward around the second axis 13 relative to the box body 10. As the door 11 flips, its own center of gravity shifts, so that the door 11 naturally rotates around the first axis 12 under the action of gravity to open or close the chamber 101.

[0061] In some embodiments, the hinge of the door 11 and the cabinet 10 may be located at or near the left or right side of the home appliance 100 along the width direction. Figure 1 and Figure 2 The example in which the first hinge 111 and the second hinge 102 are arranged on the right side of the chamber 101 along the x direction is used for exemplary display. In practical applications, the hinge of the door 11 and the box body 10 can also be arranged slightly above / below the left / right side of the door 11 along the x direction. Under the premise of ensuring that the first axis 12 and the second axis 13 are not parallel, this can also achieve that the gravity of the door 11 has an outward or inward decomposition force during the rotation of the door 11 around the second axis 13, thereby realizing the automatic door opening and closing function.

[0062] In some embodiments, the first axis 12 may be perpendicular to the second axis 13. For example, the second axis 13 may be parallel to the x-direction, and the first axis 12 may be parallel to the z-direction (i.e., the direction of gravity) when the door 11 is in the first position. In this example, as the door 11 rotates around the second axis 13, the extension direction of the first axis 12 rotates in a vertical plane (i.e., a plane perpendicular to the x-direction). As a result, the driving force of the driving mechanism 2 acts on the door 11 to turn it outward or inward with almost no component loss, which is conducive to further reducing the power requirements of the driving mechanism 2.

[0063] In some embodiments, when the door 11 is in the second position for opening the chamber 101, the first axis 12 and the direction of gravity (e.g., z direction) have a non-zero angle, and the first axis 12 extends forward and upward from the intersection with the direction of gravity. As a result, the first axis 12 turns outward around the second axis 13 synchronously with the door 11, and the force balance at the hinge of the door 11 is broken, thereby realizing the automatic door opening function of the door 11. Specifically, at this time, relative to the hinge connecting the door 11 and the box body 10, the center of gravity of the door 11 and the hinge are not on the same force plane in the vertical direction, and the gravity of the door 11 has an outward decomposition force, which causes the door 11 to spontaneously rotate around the first axis 12 to the second position to complete the door opening action.

[0064] Further, the door 11 is kept as Figure 2 During the second position shown in FIG. 1 , the drive mechanism 12 may not be reset. That is, the first shaft 12 may not be restored to a state parallel to the z direction, but may remain in the extending direction facing forward and upward, such as Figure 2 When the door 11 is closed, the door 11 and the first hinge 111 and the second hinge 102 for connecting the door 11 and the box body move from the closed position to the closed position. Figure 5 The state shown moves to Figure 8 After the door 11 closes the chamber 101, the driving mechanism 2 drives the first hinge 111 and the second hinge 102 to return to the state shown in the figure. Figure 3 and 4 The initial position shown in FIG. 1 is shown in FIG. 1 . At this time, the relative positions of the door 1 and the box body 10 are as shown in FIG. Figure 1 shown.

[0065] In one specific implementation, when the door 11 is in the first position closing the chamber 101, the first axis 12 is parallel to the gravity direction (eg, z direction). Figure 1 That is, during the period when the door 11 closes the chamber 101, the hinge between the door 11 and the box body 10 is maintained as shown. Figure 3 and Figure 4 Initial state shown.

[0066] Furthermore, when the door 11 rotates from the first position to the second position, the angle between the extension direction of the first axis 12 and the z direction increases from zero.

[0067] In this example, the door 11 is turned inwards by the driving mechanism 2 to the position shown in FIG. Fig.10 The door 11 is rotated to the first position around the first axis 12 under the action of gravity. Then, the drive mechanism 2 drives the door 11 to turn outward to the vertical position. At this time, the first hinge 111 and the second hinge 102 are in the position shown in FIG. Figure 1 , Figure 3 and Figure 4 Initial position shown.

[0068] Thus, the gravity direction of the door 11 in the first position and the hinge (e.g., the first hinge 111) are in the same vertical plane, and the hinge of the door 11 maintains force balance, ensuring that the door 11 is reliably maintained in the first position of closing the chamber 101. Furthermore, when the door 11 closes the chamber 101, there is basically no obvious concave or convex structure on the front of the household appliance 100, and the appearance is more beautiful.

[0069] In a variation, when the door 11 is in the first position, the first axis 12 and the gravity direction (e.g., z direction) may have a non-zero angle, and the lower end of the door 11 is located in front of the upper end of the door 11. That is, during the period when the door 11 closes the chamber 101, the hinge of the door 11 and the box body 10 is maintained at the position shown in FIG. Figure 8 and Fig. 9 In the state shown, the door 11 is kept as Fig.10 Pose shown.

[0070] Furthermore, during the rotation of the door 11 from the first position to the second position, the angle between the extension direction of the first axis 12 and the z direction gradually increases from a non-zero smaller value.

[0071] In this example, the door 11 is turned inwards by the driving mechanism 2 to the position shown in FIG. Fig.10 The door 11 rotates around the first axis 12 to the first position under the action of gravity. Then, the drive mechanism 2 stops working, and the first hinge 111 and the second hinge 102 stay in the position shown in FIG. Figure 8 and Fig. 9 Position shown.

[0072] Thus, the door 11 in the first position fits more closely to the chamber 101 under the action of gravity, which may be beneficial to improving the sealing performance of the chamber 101. Furthermore, the chamber 101 opens obliquely upward to match the posture of the door 11 in the first position in this example. When the door 11 opens the chamber 101, the oblique upward opening design can better facilitate users to take and put items.

[0073] In a specific implementation, continue to refer to Figure 2 When the door 11 is located at the second position for opening the chamber 101 , the plane where the door 11 is located may be parallel to the depth direction (eg, y direction) of the household appliance 100 .

[0074] Specifically, the plane where the door 11 is located at the first position is substantially perpendicular to the y direction. Figure 1 Under the action of the driving mechanism 2, the door 11 rotates around the second axis 13 and turns outward, causing the center of gravity to shift, and then automatically rotates around the first axis 12 by about 90° to the second position, that is, a position roughly parallel to the y direction.

[0075] Thus, under the action of gravity, the door 11 moves naturally and remains at the maximum opening angle, which is convenient for users to take and put items. Furthermore, with the automatic door opening and closing function implemented by this embodiment, the degree to which the door 11 can be opened automatically (for example, the maximum opening angle) and the degree to which the user can open it manually are basically consistent, so this embodiment can better replace the user's manual door opening and closing action, further improving the user's convenience.

[0076] In a specific implementation, when the door 11 moves from the first position to the second position, the angle at which the door 11 rotates around the first axis 12 can be set to [80°, 100°]. Thus, the angle at which the door 11 rotates around the first axis 12 is large enough to expose as many chambers 101 as possible for users to take and put items.

[0077] Furthermore, the angle of rotation of the door 11 around the first axis 12 during opening and closing can fluctuate within a certain range within 90°, which is conducive to meeting the diverse needs of different users for the maximum opening angle of the door 11.

[0078] For example, the door 11 at the first position may not be completely perpendicular to the depth direction (e.g., y direction) of the household appliance 100, but may have an inclination angle to the left / right. That is, the opening of the chamber 101 may be slightly inclined to the left or right side of the household appliance 100. This design is conducive to making the opening of the chamber 101 more facing the user when the household appliance 100 is placed in a corner, further facilitating the user to take and put items.

[0079] In a specific implementation, continue to refer to Figures 3 to 6 , Figure 8 , Fig. 9 and Fig.12 The driving mechanism 2 can be used to drive the second hinge 102 to rotate around the second axis 13.

[0080] Specifically, the first hinge 111 can be arranged on the left / right side of the back side (i.e., the side facing the box body 10) of the door 11, and the second hinge 102 is arranged on the side wall of the box body 10. The driving motor 21 drives the second hinge 102 to rotate in a plane perpendicular to the x-direction to drive the first hinge 111 to rotate. During the rotation of the first hinge 111, the door 11 rotates around the first axis 12 under the action of gravity to open or close the chamber 101.

[0081] Thus, the driving mechanism 2 acts on the second hinge 102 on the box body 10 , and drives the second hinge 102 to rotate to drive the door 11 to turn inward or outward, and then utilizes the gravity of the door 11 itself to realize automatic opening and closing of the door 11 .

[0082] In a specific implementation, when the door 11 is in the first position, the first hinge 111 may be perpendicular to the second hinge 102. Figure 1 , Figure 3 and Figure 4 shown.

[0083] In some embodiments, as the second hinge 102 rotates around the second axis 13 driven by the driving mechanism 2, the first hinge 111 rotates around the second axis 13 synchronously and also rotates around the first axis 12 under the action of gravity. Accordingly, in this process, the angle between the first hinge 111 and the second hinge 102 gradually increases or decreases as the two rotate around the second axis 13.

[0084] In some embodiments, when the output torque of the driving motor 21 is large enough, the second hinge 102 and the first hinge 101 can be moved from Figure 3 and Figure 4 The initial position shown quickly reaches Figure 5 and Figure 6 The door opening position shown, or quickly reach Figure 8 and Fig. 9 The door is in the closed position shown in FIG. 1 , and during this period, the first hinge 101 has not had time to rotate around the first axis 12. Figure 5 and Figure 6 Door opening position as shown or Figure 8 and Fig. 9 After the door is in the closed position shown, the first hinge 111 rotates around the first axis 12 along with the door 11 under the action of gravity.

[0085] That is to say, during this process, the angle between the first hinge 111 and the second hinge 102 remains substantially unchanged during the rotation of the first hinge 111 and the second hinge 102 around the second axis 13 , and starts to change after the first hinge 111 and the second hinge 102 rotate to a certain extent around the second axis 13 .

[0086] In a specific implementation, when the door 11 is in the second position, the first hinge 111 may be parallel to the second hinge 102. Figure 2 shown.

[0087] Specifically, when the door 11 moves from the first position to the second position, the first hinge 111 rotates around the first axis 12 from a position perpendicular to the second hinge 102 to a position parallel to the second hinge 102 , thereby completing the automatic opening of the door 11 .

[0088] Furthermore, when the door 11 moves from the second position to the first position, the first hinge 111 rotates around the first axis 12 from a position parallel to the second hinge 102 to a position perpendicular to the second hinge 102 , thereby completing the automatic closing of the door 11 .

[0089] Thus, as the second hinge 102 is turned outward or inward by the drive mechanism 2, the first hinge 11 hinged to the second hinge 102 rotates relative to the second hinge 102 around the hinge axis (i.e., the first axis 12) while maintaining synchronous turning outward or inward with the second hinge 102. This rotation process is the opening or closing process of the door 11, thereby realizing the automatic opening and closing function of the door 11.

[0090] In a specific implementation, continue to refer to Fig.12 The driving mechanism 2 may include a driving motor 21 disposed in the box body 10 , and an output shaft 211 of the driving motor 21 is connected to the second hinge 102 .

[0091] Furthermore, a ball bearing 22 may be sleeved on the output shaft 211, and the ball bearing 22 is fixed on the housing 10. The ball bearing 22 may support the output shaft 211, thereby extending the service life of the component.

[0092] For example, refer to Figures 2 to 4 , Fig.12 , the first hinge 111 is fixedly connected to the door 11, and the door 11 is opened and closed by the rotation of the second hinge 102. Further, the second hinge 102 is fixedly connected to the motor sleeve 212 by three fixing bolts, the motor sleeve 212 is sleeved on the output shaft 211, the motor sleeve 212 is covered with a ball bearing 22, and the ball bearing 22 is fixed to the box body 10. The output shaft 211 rotates a certain angle, driving the motor sleeve 212 to rotate, and then driving the second hinge 102 fixed on the motor sleeve 212 to rotate, and finally achieving different front and rear tilt angles of the door 11 (i.e., the angle of turning outward or inward), and realizing the function of automatic opening and closing of the door 11 by the gravity of the door 11 itself.

[0093] Thus, the hinge cooperates with the structure of the driving motor 21, and the door 11 is driven to change its angle in the vertical direction by the rotation of the driving motor 21, and the door 11 is automatically opened and closed by the change of the center of gravity. Furthermore, since the output torque of the driving motor 21 acts on the second hinge 102 instead of the first hinge 111 or the hinge axis of the two hinges, the door 11 can still be opened and closed manually, thereby ensuring that the machine is not affected when the driving motor 21 fails.

[0094] In some embodiments, the output shaft 211 may be parallel to the second axis 13. For example, the output shaft 211 may be parallel to the width direction of the household appliance 100, that is, parallel to the x direction. Thus, the output torque of the output shaft 211 may act on the movement of the second hinge 102 around the second axis 13 with almost no loss, which is conducive to further reducing the power requirement of the drive mechanism 2.

[0095] In some embodiments, the output shaft 211 and the second shaft 13 may have a non-zero angle. As a result, the drive mechanism 2, such as the drive motor 21, can be more flexible in the location of the housing 10. For example, the drive motor 21 can be disposed in an empty area inside the housing 10 and connected to the second hinge 102 through at least one transmission mechanism. Since the output shaft 211 is no longer limited to being parallel to the second shaft 13, there are more options for the location of the drive motor 21 in the housing 10, which is conducive to making full use of the internal space of the housing 10 and meeting the miniaturization design requirements of the household appliance 100.

[0096] In some embodiments, the drive motor 21 may be, for example, a rotary motor, a stepping motor, or the like.

[0097] In some embodiments, the driving mechanism 2 may include a gear motor and a motor crank. Specifically, the gear motor is disposed in the housing 10, and the motor crank is connected to the gear motor and the second hinge 102 respectively. The gear motor drives the motor crank to rotate, thereby driving the second hinge 102 to rotate around the second axis 13.

[0098] Further, the motor crank can be indirectly connected to the second hinge 102 through a connecting rod mechanism. Thus, the rotation trajectory of the second hinge 102 around the second axis 13 can be better controlled through the connecting rod mechanism.

[0099] In some embodiments, the driving mechanism 2 may include a push rod motor and a connecting rod mechanism. Specifically, the propulsion motor is disposed in the housing 10, and the connecting rod mechanism connects the propulsion motor and the second hinge 102 respectively. The linear driving force of the propulsion motor is converted into a rotational motion to act on the second hinge 12 through the connecting rod mechanism, thereby driving the second hinge 102 to rotate around the second axis 13.

[0100] In some embodiments, the driving mechanism 2 may also be an electromagnetic driving mechanism, a pneumatic driving mechanism, a hydraulic driving mechanism, etc.

[0101] In a specific implementation, continue to refer to Figure 3 , Figure 5 and Figure 8 The household appliance 100 may further include a limiting portion 3, which is disposed on the housing 10; a matching portion 4, which is disposed on the second hinge 102, and the matching portion 4 is used to cooperate with the limiting portion 3 to limit the maximum rotation angle of the second hinge 102 around the second axis 13. In this way, the maximum degree of the door 11 turning outward or inward under the action of the driving mechanism 2 can be limited, so as to avoid the door 11 from being damaged by collision due to excessive turning outward or inward.

[0102] For example, the matching portion 4 may include a limiting groove 41, which is provided on the second hinge 102 and at least open toward the box body 10, and the limiting portion 3 may include a limiting pin 31, which extends outward from the box body 10. During the rotation of the second hinge 102 around the second axis 13, the limiting pin 31 moves in the limiting groove 41. In some embodiments, the limiting groove 41 may penetrate the second hinge 102 along the x direction, and the limiting pin 31 passes through the limiting groove 41. Thus, the rotation angle limiting function of the driving motor 21 is realized through the limitation of the mechanical mechanism.

[0103] Furthermore, the limiting groove 41 may extend in an arc shape, and the circle to which the arc belongs takes the second axis 13 as the center. Thus, the movement trajectory of the limiting pin 31 relative to the second hinge 102 can be matched during the rotation of the second hinge 102 around the second axis 13.

[0104] For another example, the matching portion 4 may include a limiting pin 31, and the limiting portion 3 may include a limiting groove 41, which can also achieve the limiting function.

[0105] Thus, the rotation positioning of the drive motor 21 is achieved through the restriction of the mechanical mechanism. By limiting the rotation angle of the drive motor 21 within a reasonable value range, it is helpful to reasonably control the maximum degree to which the door 11 can be turned outward or inward, and avoid the door 11 from being damaged by collision due to excessive turning outward or inward. Furthermore, the above mechanical mechanism is also helpful to improve the fixing firmness of the drive mechanism 2 and the second hinge 102, and has a simple structure and high reliability.

[0106] In some embodiments, the limiting groove 41 may be located at the periphery of the motor sleeve 212. For example, a plurality of limiting grooves 41 may be arranged at intervals around the motor sleeve 212, which is conducive to stable and reliable limiting during the rotation of the second hinge 102.

[0107] In some embodiments, the limiting groove 41 may be provided on the motor sleeve 212. Thus, the size of the second hinge 102 may be made smaller, which is conducive to releasing more space for other structures of the household appliance 100.

[0108] In some embodiments, the number of the limiting grooves 41 may be multiple. Figure 3 , Figure 5 and Figure 8 The upper and lower arc-shaped limit grooves 41 are used as an example for exemplary display. Correspondingly, the number of limit pins 31 is also two and passes through the corresponding limit grooves 41 respectively. In practical applications, the two limit grooves 41 can also be arranged symmetrically from the perspective of the figure. In practical applications, the number of the plurality of limit grooves 41 can also be three, four or even more, and the plurality of limit grooves 41 can be evenly distributed on the second hinge 102 with the second axis 13 as the center.

[0109] In some embodiments, the distances from the plurality of limit slots 41 to the second axis 13 may be the same, which is conducive to reducing manufacturing difficulty and reducing costs. Further, the lengths of the plurality of limit slots 41 along the extension direction may be the same.

[0110] In some embodiments, the distance between at least one limiting groove 41 and the second shaft 13 may be different from the distance between other limiting grooves 41 and the second shaft 13. Furthermore, the lengths of the limiting grooves 41 along the extension direction at different distances may be different to ensure that the limiting function is achieved at the same motor rotation angle.

[0111] In some embodiments, the limiting pin shaft 31 may be, for example, a cylindrical pin, which is conducive to smooth sliding in the limiting groove 41 and reduces friction.

[0112] In some embodiments, the length of the limit groove 41 along the extension direction may be positively correlated with the speed at which the door 11 opens or closes the chamber 101. Specifically, the longer the length of the arc, the more the center of gravity of the door 11 shifts when it rotates around the second axis 13, and the faster the door 11 automatically opens or closes. Therefore, by reasonably designing the arc length of the limit groove 41, the speed at which the door 11 automatically opens or closes can be controlled to meet user needs.

[0113] In a specific implementation, the household appliance 100 may further include: a lock portion 5 and a coupling portion (not shown), one of the lock portion 5 and the coupling portion is disposed on the housing 10 , and the other of the lock portion and the coupling portion is disposed on the door 11 . Figure 2 and Fig.11 The lock part 5 is arranged on the door 11 and the coupling part is arranged on the box body 10 for exemplary display.

[0114] Further, the lock portion 5 and the coupling portion can be switched between a locked state and an uncoupled state. The lock portion 5 and the coupling portion are in a locked state during the period when the door 11 closes the chamber 101, and are switched to an uncoupled state at least when or before the door 11 rotates around the second axis 13.

[0115] Thus, through the cooperation between the lock part 5 and the coupling part, it is ensured that the door 11 reliably closes the chamber 101 when the door 11 is located at the first position, and it is ensured that the door 11 can move freely when the automatic door opening and closing function is required.

[0116] In some embodiments, the lock portion 5 may be, for example, an electronic lock, and the control module of the household appliance 100 may control the connection state between the electronic lock and the coupling portion to switch between a locked state and a structural state.

[0117] Specifically, the control module may be, for example, a single chip microcomputer of the household appliance 100, which is used to control the operation of the household appliance 100. For example, the control module may include a central processing unit of the household appliance 100. Alternatively, the control module may be, for example, a module in the household appliance 100 dedicated to controlling an electronic lock, or a module dedicated to controlling the operation of the driving mechanism 2 to realize the automatic door opening and closing function described in this embodiment.

[0118] For example, the control module controls the electronic lock and the coupling part to decouple, and then controls the driving mechanism 2 to drive the second hinge 102 to rotate around the second axis 13 to realize automatic door opening 11 .

[0119] For another example, the control module can control the driving mechanism 2 to drive the second hinge 102 to rotate. After detecting that the door 11 automatically returns to the first position, the control module controls the electronic lock and the coupling part to lock to complete the door closing action.

[0120] In some embodiments, in response to detecting that a human body is approaching the household appliance 100, the control module can automatically control the lock portion 5 and the coupling portion to switch from a locked state to a decoupled state. Further, the control module can then control the drive mechanism 2 to work to complete the automatic door opening action. Thus, the user can approach the household appliance 100 to automatically open the door without the user having to specifically issue an operation instruction, which facilitates the user's operation in a more intelligent manner.

[0121] In some embodiments, the connection state between the lock portion 5 and the coupling portion can be automatically switched according to the position of the door 11 relative to the housing 10. The door lock portion can be automatically released or locked by rotating the door 11.

[0122] For example, the lock portion 5 may include a mechanical lock, and through the cooperation between the lock portion 5 and the coupling portion, synchronous unlocking or locking is achieved as the door 11 rotates around the second axis 13 .

[0123] Therefore, the freedom of movement of the door 11 relative to the box body 10 can be automatically adjusted without the user having to perform additional operations or issue instructions, which is beneficial to improving the intelligence of the home appliance 100.

[0124] From the above, by adopting this implementation scheme, the center of gravity change of the door 11 itself is utilized, and only a low-power drive mechanism 2 is required to realize the automatic opening and closing of the door 11, which improves the convenience of use for users on the one hand, and has low cost and low energy consumption of the whole machine on the other hand. Specifically, the hinge axis between the door 11 and the box body 10 is separated from the rotation axis of the drive mechanism 2 driving the door 11 to rotate, wherein the former is the first axis 12, and the latter is the second axis 13. The separation of the two axes enables the output torque of the drive mechanism 2 to be decoupled from the opening and closing of the hinge, and the driving force of the drive mechanism 2 does not directly act on the opening and closing process of the door 11. Further, by making a non-zero angle between the second axis 13 and the first axis 12, the drive mechanism 2 only needs a small torque to realize the change of the flip angle of the door 11, for example, in the direction of gravity, so as to cause the center of gravity of the door 11 to shift, and then drive the change of the opening and closing state of the door 11. Therefore, the drive mechanism 2 is responsible for driving the door 11 to change its flip angle, and does not need to drive the door 11 to open and close the door, so only a small-power motor is required to realize this function, and the cost is low. Furthermore, since a low-power motor is used, the energy consumption of the household appliance 100 is also reduced.

[0125] Furthermore, through the cooperation of the first shaft 12 and the second shaft 13, the door 11 can be opened automatically, opened and maintained at a fixed door opening angle, and automatically closed. Thus, the convenience of use by the user is further improved. The fixed door opening angle can be, for example, 90° relative to the box body 10, so that the door 11 is maintained at a fixed door opening angle that exposes the chamber 101 to the greatest extent, making it convenient for the user to take and put items in the chamber 101.

[0126] Furthermore, the driving force of the driving mechanism 2 does not directly act on the opening and closing process of the door 11, and the opening and closing of the door 11 is not restricted by the driving mechanism 2. Therefore, in the case of power failure, even if the driving motor 21 cannot work, the connection between the door 11 and the box body 10 and the opening and closing process can still be achieved through the hinge (for example, the first hinge 111 and the second hinge 102), and the user can still manually open and close the door 11. Thus, the user convenience is further improved.

[0127] Furthermore, the drive mechanism 2 can drive the door 11 to rotate around the second axis 13 without complicated structural design, and the whole system has a simple structure and high reliability. Even if the whole system fails, the user can still open and close the door 11 manually without affecting the use of the whole machine.

[0128] Furthermore, by controlling the door 11 to rotate around the second axis 13 to achieve different flipping angles through the drive mechanism 2, the center of gravity position of the door 11 can be adjusted to achieve the automatic opening and closing angle of the door 11. For example, the drive motor 21 can rotate at different angles to flip the door 11 to different states, and different angles of automatic opening and closing of the door 11 can be achieved by adjusting the different center of gravity positions of the door 11.

[0129] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in this disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claims, and the technical features from the corresponding independent claims may be combined in any appropriate manner rather than just by the specific combinations listed in the claims.

[0130] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A household appliance, comprising: A housing (10) defines a chamber (101); A door (11) is hinged to the front of the box (10), and the door (11) can rotate around a first axis (12) to open or close the chamber (101); It is characterized by further comprising: A driving mechanism (2) is arranged on the box body (10), and the driving mechanism (2) is used to drive the door (11) to rotate around a second axis (13), wherein the second axis (13) and the first axis (12) have a non-zero angle, and as the door (11) rotates around the second axis (13), the door (11) also rotates around the first axis (12) to open or close the chamber (101).

2. The household appliance according to claim 1, characterized in that: The first axis (12) is perpendicular to the second axis (13), and / or the second axis (13) is parallel to the width direction of the household appliance.

3. The household appliance according to claim 1, characterized in that: The extension direction of the first axis (12) changes as the door (11) rotates around the second axis (13).

4. The household appliance according to claim 3, characterized in that: When the door (11) is located in the first position closing the chamber (101), the first axis (12) is parallel to the direction of gravity, or the first axis (12) and the direction of gravity have a non-zero angle and the lower end of the door (11) is located in front of the upper end of the door (11).

5. The household appliance according to claim 3, characterized in that: When the door (11) is located at the second position for opening the chamber (101), the first axis (12) and the direction of gravity have a non-zero angle, and the first axis (12) extends forward and upward from the intersection with the direction of gravity.

6. The household appliance according to claim 1, characterized in that: When the door (11) is located at the second position for opening the chamber (101), the plane where the door (11) is located is parallel to the depth direction of the household appliance.

7. The household appliance according to claim 1, characterized in that: During the movement of the door (11) from a first position closing the chamber (101) to a second position opening the chamber (101), the angle at which the door (11) rotates around the first axis (12) is in the range of [80°, 100°].

8. The household appliance according to claim 1, characterized in that: Also includes: A first hinge (111) and a second hinge (102) are hingedly connected, wherein the first hinge (111) is arranged on the door (11), and the second hinge (102) is arranged on the box body (10), and the driving mechanism (2) is used to drive the second hinge (102) to rotate around the second axis (13).

9. The household appliance according to claim 8, characterized in that: When the door (11) is in a first position closing the chamber (101), the first hinge (111) is perpendicular to the second hinge (102); and / or, when the door (11) is in a second position opening the chamber (101), the first hinge (111) is parallel to the second hinge (102).

10. The household appliance according to claim 8, characterized in that: The driving mechanism (2) comprises: a driving motor (21) disposed in the box (10); an output shaft (211) of the driving motor (21) is connected to the second hinge (102).

11. The household appliance according to claim 8, characterized in that: Also includes: A limiting portion (3) is arranged on the box body (10); A matching portion (4) is arranged on the second hinge (102), and the matching portion (4) is used to match with the limiting portion (3) to limit the maximum rotation angle of the second hinge (102) around the second axis (13).

12. The household appliance according to claim 11, characterized in that: The matching portion (4) comprises a limiting groove (41), the limiting portion (3) comprises a limiting pin shaft (31), and when the second hinge (102) rotates around the second axis (13), the limiting pin shaft (31) moves in the limiting groove (41).

13. The household appliance according to claim 12, characterized in that: The limiting groove (41) extends in an arc shape, and the circle to which the arc belongs has the second axis (13) as its center; and / or the length of the limiting groove (41) along the extension direction is positively correlated with the speed at which the door (11) opens or closes the chamber (101).

14. The household appliance according to claim 1, characterized in that: Also includes: A locking portion (5) and a coupling portion, one of which is arranged on the housing (10), and the other of which is arranged on the door (11), and the locking portion (5) and the coupling portion can be switched between a locked state and an uncoupled state, the locking portion (5) and the coupling portion are in the locked state while the door (11) closes the chamber (101), and are switched to the uncoupled state at least when or before the door (11) rotates around the second axis (13).

15. The household appliance according to claim 14, characterized in that: The connection state between the locking portion (5) and the coupling portion is automatically switched according to the position of the door (11) relative to the box body (10).

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