Hinge mechanism and electric appliance

Abstract

The application discloses a hinge mechanism and an electrical appliance. The hinge mechanism is used for connecting a box body and a door body. The hinge mechanism comprises a fixed seat, a first connecting rod mechanism, a second connecting rod mechanism, a first movable seat and a second movable seat. The fixed seat is arranged on the box body and cooperates with the first movable seat and the second movable seat arranged on the door body through the first connecting rod mechanism and the second connecting rod mechanism respectively. The rotation axis of the first connecting rod mechanism rotating with the fixed seat is coaxially arranged with the rotation axis of the corresponding second connecting rod mechanism rotating with the fixed seat. In this way, the application can improve the consistency of different door body opening trajectories.

Description

Technical Field

[0001] This application relates to the field of electrical appliances, and in particular to hinge mechanisms and electrical equipment. Background Technology

[0002] For example, appliances such as refrigerators or ovens have cavities. When items are placed inside or retrieved from these cavities, the doors need to rotate to open or close the cavities. Some appliances have multiple doors, and each door requires a hinge mechanism to open. The structure of the hinge mechanism affects the opening trajectory of each door. Utility Model Content

[0003] Embodiments of this application provide hinge mechanisms and electrical devices that can improve the consistency of opening trajectories for different doors.

[0004] This application provides a hinge mechanism. The hinge mechanism is used to connect a box and a door. The hinge mechanism includes a fixed base, a first linkage mechanism, a second linkage mechanism, a first movable base, and a second movable base. The fixed base is disposed on the box and engages with the first movable base and the second movable base disposed on the door via the first linkage mechanism and the second linkage mechanism, respectively. The first movable base and the second movable base are respectively disposed on both sides of the fixed base. The first movable base engages with the fixed base via the first linkage mechanism, and the second movable base engages with the fixed base via the second linkage mechanism. The first movable base and the fixed base are rotatably engaged via the first linkage mechanism, and the second movable base and the fixed base are rotatably engaged via the second linkage mechanism. When both the first linkage mechanism and the second linkage mechanism are in the closed state, the first linkage mechanism and the second linkage mechanism are mirror-symmetrically arranged. The first linkage mechanism is rotatably engaged with the fixed base, and the second linkage mechanism is rotatably engaged with the fixed base. The rotation axis of the first linkage mechanism engaging with the fixed base is coaxial with the rotation axis of the corresponding second linkage mechanism engaging with the fixed base.

[0005] This application provides an electrical device. The electrical device includes a door and a housing. The door and the housing are rotatably connected by a hinge mechanism, wherein the door can be rotated to close or open the housing. The electrical device includes two doors, both of which are rotatably engaged with the housing. The two doors are spaced apart in the direction of their rotation axis, and the hinge mechanism is disposed between the two doors. A first movable seat is installed on one door, and a second movable seat is installed on the other door.

[0006] The beneficial effects of this application are as follows: Unlike the prior art, this method allows for the fixation of the first linkage mechanism and the second linkage mechanism by a fixed base, and by setting the rotation axis of the first linkage mechanism rotating with the fixed base to be coaxial with the rotation axis of the corresponding second linkage mechanism rotating with the fixed base, the consistency of the opening trajectories of the two doors defined by the first linkage mechanism and the second linkage mechanism is increased. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of an embodiment of the electrical equipment of this application; Figure 2 This is a schematic diagram of the hinge mechanism of the door of the electrical equipment of this application in the closed state; Figure 3 yes Figure 2 An exploded view of the hinge mechanism shown. Figure 4 yes Figure 3 A schematic diagram of the third link in the hinge mechanism shown; Figure 5 yes Figure 2 A simplified schematic diagram of the hinge mechanism shown. Figure 6 This is a schematic diagram of the hinge mechanism of the door of the electrical equipment of this application when it is opened to 30 degrees; Figure 7 yes Figure 6 A simplified schematic diagram of the hinge mechanism shown. Figure 8 This is a schematic diagram of the hinge mechanism of the door of the electrical equipment of this application when it is opened to 90 degrees; Figure 9 yes Figure 8 A simplified schematic diagram of the hinge mechanism shown. Figure 10 This is a schematic diagram of the hinge mechanism of the door of the electrical equipment of this application when it is opened to 120 degrees; Figure 11 yes Figure 10 A simplified schematic diagram of the hinge mechanism shown. Figure 12 This is a schematic diagram of another embodiment of the hinge mechanism of this application; Figure 13 yes Figure 12 A schematic diagram of the hinge mechanism shown, viewed from one angle. Figure 14 yes Figure 12 A schematic diagram of the hinge mechanism shown from another angle. Figure 15 yes Figure 13 The diagram shows a cross-sectional view of the hinge mechanism at the first and third revolute joints. Detailed Implementation

[0008] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0009] The inventors of this application have discovered through research that electrical appliances such as refrigerators or ovens have cavities. When items are placed inside or retrieved from these cavities, the door needs to rotate to open or close. During this process, the door is prone to colliding with other walls or cabinets in the environment. With increasingly higher demands for space utilization and aesthetic appeal after installation, embedded electrical appliances are becoming increasingly popular. Especially for embedded appliances, the possibility of interference with walls or cabinets during door rotation and opening / closing is further increased after the appliance is embedded. To improve the above-mentioned technical problems, this application provides the following embodiments.

[0010] Combination Figure 1 This application provides an electrical appliance 1. The electrical appliance 1 may be, for example, a refrigerator, an oven, a microwave oven, or a microwave-steam-grill combination appliance, etc., and is not specifically limited here.

[0011] Electrical equipment 1 includes a housing 10 and doors 20. The door 20 of electrical equipment 1 can be a single door. Multiple doors 20 can also be provided in the height direction, with the rotation axes of the multiple doors 20 coaxially arranged or located on the same side of electrical equipment 1. Alternatively, electrical equipment 1 can have two doors 20 arranged opposite each other on the left and right sides, forming a double-door configuration, with the rotation axes of the two doors 20 respectively located on opposite sides of electrical equipment 1.

[0012] For ease of description, the electrical device 1 provided in this application embodiment has a first direction (refer to the Y-axis direction in each figure), a second direction (refer to the X-axis direction in each figure), and a third direction. The electrical device 1 has a front side and a rear side opposite to each other in the first direction. The front and rear sides of the electrical device 1 are relative to the user. Taking a refrigerator as an example, the side of the refrigerator with the door 20 is the front side. The electrical device 1 also has a second direction perpendicular to the first direction. Optionally, the second direction is a left-right direction relative to the user, and it is also a horizontal direction. The electrical device 1 also has a third direction that intersects with the first and second directions. The third direction can be the height direction of the electrical device 1, or it can be the direction of gravity of the electrical device 1 when it is normally placed. Optionally, the third direction is perpendicular to the first and second directions.

[0013] Specifically, the electrical device 1 includes a cabinet 10 and a door 20. The door 20 and the cabinet 10 are rotatably connected. The door 20 has a closed state and an open state, and the open state of the door 20 has various opening angles, such as 30 degrees, 60 degrees, 90 degrees, or 120 degrees. The door 20 has a maximum opening degree, which is greater than or equal to 120 degrees. The door 20 and the cabinet 10 are rotatably connected by a hinge mechanism 30. The hinge mechanism 30 can rotatably connect the door 20 and the cabinet 10, and can provide mechanical support for the door 20, ensuring its normal opening. By setting the hinge mechanism 30, the opening and closing trajectory of the door 20 can be reasonably controlled, thereby reducing the possibility of interference between the door 20 and the cabinet or wall during opening or closing. Optionally, the axis of rotation of the door 20 relative to the cabinet 10 is along a third direction. The hinge mechanism 30 also has a closed state and an open state. The closed state of the hinge mechanism 30 corresponds to the closed state of the door 20, and the different open states of the hinge mechanism 30 correspond to different opening degrees of the door 20. The hinge mechanism 30 has a maximum opening angle.

[0014] Combination Figure 2Furthermore, for ease of description of the embodiments of this application, the electrical device 1 of this application can take an origin to form a coordinate system. Specifically, when the door 20 is closed, the plane containing the front wall of the door 20 in the first direction intersects with the plane containing the wall of the door 20 on the side away from the box 10 in the second direction to form a coordinate origin. A coordinate system can be formed based on this coordinate origin. The direction away from the box 10 in the second direction, with the coordinate origin as the starting point, is the positive X-axis, and the direction closer to the box 10 in the first direction, with the coordinate origin as the starting point, is the positive Y-axis. "Closer to" or "away from" the box 10 refers to being closer to or farther from the geometric center or centroid of the box 10. The plane containing the front wall of the door 20 in the first direction intersects with the plane containing the wall of the door 20 on the side away from the box 10 in the second direction to form an intersection line, and the projection of the intersection line onto the horizontal plane is the coordinate origin. For example... Figure 2 The electrical device 1 shown has a door 20 hinged to the right side of the front of the housing 10. The intersection of the plane containing the front wall of the door 20 and the plane containing the right wall of the door 20 forms the origin of a coordinate system on the horizontal projection. The positive direction of the X-axis is a second direction away from the housing 10 and towards the right, and the positive direction of the Y-axis is a first direction closer to the housing 10 and towards the rear. When both the front and right walls of the door 20 are planar, the origin of the coordinate system is located at the door edge where the front and right walls of the door 20 meet.

[0015] This application provides a hinge mechanism 30. The hinge mechanism 30 is used to connect a door 20 and a housing 10. In some embodiments, the hinge mechanism 30 is configured to prevent the door 20 from entering a region in the first quadrant of the coordinate system where the X-coordinate is greater than a preset value η during rotation. After the electrical appliance 1 is installed or placed, there may be cabinets or walls on both sides of the electrical appliance 1. With reference to the coordinate system, the first quadrant is provided with, for example, cabinets or walls. Therefore, the door 20 needs to gradually move forward during rotation to avoid cabinets or walls located in the first quadrant. If the door 20 enters a region in the first quadrant where the X-coordinate is greater than the preset value η during rotation, the interference of the cabinet or wall will prevent the door 20 from opening to a larger angle, and the interference between the door 20 and the cabinet or wall will cause damage to the door 20 or the cabinet. When the electrical device 1 is an embedded electrical device 1, after the electrical device 1 is embedded, the front side of the electrical device 1 is flush with the outer side of the wall or cabinet or is set in a deeper position. In this case, at least the first quadrant will be equipped with a cabinet or wall. If the door 20 enters the first quadrant during rotation, it will interfere with the cabinet or wall, causing the door 20 to be unable to open normally.

[0016] Furthermore, the door body 20 includes a front wall 21 and a rear wall 22 disposed opposite to each other, and the door body 20 also includes a side wall 23, which connects the front wall 21 and the rear wall 22 at their ends near the hinge mechanism 30 in a second direction. When the door body 20 closes the housing 10, the front wall 21 and the rear wall 22 are spaced apart in the first direction. A front edge 201 is formed at the connection between the front wall 21 and the side wall 23 where the Y-axis coordinate is 0. When there is no chamfer at the connection between the front wall 21 and the side wall 23, the door edge connecting the front wall 21 and the side wall 23 is the front edge 201, and in this case, both the X and Y coordinates of the front edge 201 are 0. When there is a chamfer at the connection between the front wall 21 and the side wall 23, the edge of the chamfer connecting the front wall 21 is the front edge 201, and in this case, the X coordinate of the front edge 201 is negative and the Y coordinate is 0. During the rotation of the door 20, the front edge 201 is most likely to interfere with the side walls and cabinets. It is necessary to ensure that the front edge 201 does not interfere with the cabinets or walls during the rotation. Therefore, in this embodiment, by ensuring that the front edge 201 does not enter the area with an X-coordinate greater than a preset value η in the first quadrant of the coordinate system during the rotation of the door 20, interference between the door 20 and the cabinets and walls can be reduced.

[0017] Optionally, the preset value η is greater than or equal to 0 mm and less than or equal to 2 mm.

[0018] In some embodiments, the housing 10 has a first side plate 11 and a second side plate 12 disposed opposite each other in a second direction. A hinge mechanism 30 is disposed on the portion of the housing 10 near the first side plate 11. For example... Figure 1 The electrical equipment 1 includes a first side plate 11 on the right and a second side plate 12 on the left, and a hinge mechanism 30 is connected to the part of the housing 10 near the first side plate 11.

[0019] In some embodiments, when the door 20 is closed and during rotation relative to the housing 10, the front edge 201 is located on the side away from the housing 10 along the X-axis. In other words, the Y-coordinate of the front edge 201 in the coordinate system is always less than or equal to 0.

[0020] Combination Figure 8 In some embodiments, when the door 20 is opened 90 degrees relative to the housing 10, the distance L1 between the door 20 and the housing 10 in the first direction is between 2.5-20mm, for example, 5mm, 10mm, or 20mm. If the distance between the door 20 and the housing 10 is too small, the door 20 may interfere with the housing 10 or encroach on the internal space of the housing 10 during opening and closing. If the distance between the door 20 and the housing 10 is too large, it will result in a larger torque on the hinge mechanism 30, placing higher demands on the load-bearing capacity of the hinge mechanism 30.

[0021] In the second direction, the front edge 201 is located on the side of the first side panel 11 away from the second side panel 12, and the distance L2 between the front edge 201 and the first side panel 11 is between 0-30mm. If the distance between the front edge 201 and the first side panel 11 is too large, it will cause the door 20 to extend a large distance beyond the cabinet 10 in the second direction, which may easily cause the door 20 to interfere with the cabinet or cabinet 10 during opening or closing.

[0022] In some embodiments, a rear ridge is formed at the end of the rear wall 22 near the side wall. When the opening angle of the door 20 relative to the housing 10 is between 0 and 80 degrees, the distance the rear ridge moves in the first direction is less than or equal to the thickness of the door 20. In other words, when the opening angle of the door 20 is between 0 and 80 degrees, the Y-coordinate of the rear ridge is greater than or equal to 0. During the rotational opening process of the door 20, the rear ridge is the part that moves the slowest relative to the housing 10 in the first direction. If the distance the rear ridge moves in the first direction is greater than the thickness of the door 20, each part of the door 20 will be located below the X-axis, meaning its Y-coordinate is less than or equal to 0. If the distance the rear ridge moves in the first direction is greater than the thickness of the door 20 when the door 20 is open between 0 and 80 degrees, the movement space of the door 20 is already limited during the opening process, reducing the maximum opening angle of the door 20. In other words, the door opening is between 0 and 80 degrees, and the rear edge moves on one side of the positive Y-axis. With further rotation, the rear edge will cross the X-axis.

[0023] Combination Figure 10 In some embodiments, when the door 20 is opened to its maximum angle relative to the cabinet 10, the distance between the front edge 201 and the X-axis in the first direction is greater than or equal to 1 mm and less than or equal to 3 mm. If the distance between the front edge 201 and the X-axis in the first direction is less than 1 mm when the door 20 is opened to its maximum angle relative to the cabinet 10, it increases the possibility of the door 20 colliding with cabinets or doors in the first quadrant or extending beyond the first quadrant to a portion of the fourth quadrant. If the distance between the front edge 201 and the X-axis in the first direction is greater than or equal to 3 mm, it will affect the maximum opening angle of the door 20.

[0024] Combination Figure 3 This application embodiment provides a hinge mechanism 30. The hinge mechanism 30 is used to connect the housing 10 and the door 20.

[0025] The hinge mechanism 30 includes a fixed base 31 and a linkage mechanism 32. The fixed base 31 is disposed on the housing 10. A movable base 33 is disposed on the door 20. The fixed base 31 cooperates with the movable base 33 disposed on the door 20 through the linkage mechanism 32. In some embodiments, the door 20 is provided with a mounting groove, and the movable base 33 is mounted in the mounting groove, thereby increasing the consistency of the appearance of the movable base 33 with the door 20 and reducing the additional space occupied by the movable base 33. In other embodiments, the movable base 33 is integrally formed with the door 20, and the track groove 330 mentioned later can be directly formed on the door 20.

[0026] Specifically, in combination Figure 2 , Figure 3 , Figure 6 , Figure 8 and Figure 10 The linkage mechanism 32 includes a first link 321, a second link 322, and a third link 323. The first link 321 is rotatably engaged with the fixed base 31. The first link 321 is rotatably engaged with the second link 322. The second link 322 is rotatably engaged with the movable base 33. The third link 323 is rotatably engaged with the fixed base 31. The third link 323 is rotatably engaged with the second link 322. Optionally, one end of the first link 321 is rotatably engaged with one end of the second link 322, the movable base 33 is rotatably engaged with the other end of the second link 322, and the third link 323 is rotatably engaged with the middle portion of the second link 322. The movable base 33 is provided with a track groove 330, and the third link 323 has a sliding portion 3234 that extends into the track groove 330. The track groove 330 allows the sliding portion 3234 to move along the track groove 330 and allows the sliding portion 3234 to rotate relative to the movable base 33. The movable seat 33 has one degree of freedom relative to the fixed seat 31. Through this method, the hinge mechanism 30, while connecting the door 20 and the cabinet 10, cooperates with the movable seat 33 to restrict the degree of freedom of the door 20 relative to the cabinet 10, thus allowing the door 20 to rotate relative to the cabinet 10. Furthermore, by configuring the first link 321, the second link 322, the third link 323, and the track groove 330 in the linkage mechanism 32, the rotation of the door 20 can be restricted by the hinge mechanism 30 to move along a specific trajectory. By restricting the rotation trajectory of the door 20 through the cooperation of the hinge mechanism 30 and the movable seat 33, the door 20 can satisfy the limitations on the position, angle, and distance of the door 20 in various embodiments of this application when rotating through different angles. This allows the door 20 to move in the first direction to the negative Y-axis side while having a sufficiently large opening, reducing interference with the cabinet or wall. Furthermore, the hinge mechanism 30 of this application only requires a first link 321, a second link 322 and a third link 323 and a track groove 330 that cooperate with it. The hinge mechanism 30 has fewer parts and lower manufacturing cost.

[0027] For ease of description, the various rotating connections formed in the first link 321, second link 322, third link 323, and movable seat 33 in the embodiments of the hinge mechanism 30 and movable seat 33 of this application are given different names. It should be noted that these names are merely numbering of the rotating connections and should not be construed as limiting the rotating connection relationship. Specifically, in conjunction with Figure 5 , Figure 7 , Figure 9 and Figure 11 In this application, the first link 321 rotatably engages with the fixed base 31 to form a first revolute joint 301; the first link 321 rotatably engages with the second link 322 to form a second revolute joint 302; the second link 322 rotatably engages with the movable base 33 to form a third revolute joint 303; the third link 323 rotatably engages with the fixed base 31 to form a fourth revolute joint 304; and the third link 323 rotatably engages with the second link 322 to form a fifth revolute joint 305. The fifth revolute joint 305 is located on the second link 322, between the third revolute joint 303 and the second revolute joint 302.

[0028] In some embodiments, the rotation axes of the first rotary joint 301, the second rotary joint 302, the third rotary joint 303, the fourth rotary joint 304, and the fifth rotary joint 305 are parallel to each other. While the sliding part 3234 can slide along the extension direction of the track groove 330, the sliding part 3234 (or the third connecting rod 323) can rotate relative to the movable seat 33 within the track groove 330. In other words, in this embodiment, the sliding part 3234 and the track groove 330 form a high pair. The direction of the line contact between the sliding part 3234 and the track groove 330 is parallel to the axial direction of the first rotary joint 301. Optionally, the sliding part 3234 is cylindrical, and its rotation axis is parallel to the axial direction of the first rotary joint 301. Optionally, the direction of movement of the sliding part 3234 relative to the track groove 330 is perpendicular to the rotation axis of the first rotary joint 301.

[0029] In some embodiments, the first link 321 and the third link 323 are located on the same side of the second link 322 along the axial direction of the first revolute joint 301. Based on the aforementioned connection relationship, by setting the first link 321 and the third link 323 to be on the same side of the second link 322, the first link 321, the second link 322, and the third link 323 can be rotatably connected to each other, while saving the space occupied by the linkage mechanism 32 along the axial direction of the first revolute joint 301, which is beneficial to the miniaturization of the hinge mechanism 30.

[0030] Combination Figure 3In some embodiments, the fixed seat 31, the linkage mechanism 32, and the movable seat 33 are spaced apart along the axial direction of the first revolute joint 301. Along the axial direction of the first revolute joint 301, the linkage mechanism 32 is located between the fixed seat 31 and the movable seat 33. In this way, when the door 20 is closed, the space occupied by the fixed seat 31, the linkage mechanism 32, and the movable seat 33 in the horizontal direction can be reduced, allowing them to be accommodated on the upper or lower side of the door 20 when closed, rather than between the door 20 and the housing 10.

[0031] Furthermore, the first link 321 and the third link 323 are located on the side of the second link 322 closer to the fixed seat 31. The first link 321 and the third link 323, which need to be rotatably connected to the fixed seat 31, can be connected to the fixed seat 31 on the side of the second link 322 away from the movable seat 33, without affecting the cooperation between the second link 322 and the third link 323 and the movable seat 33. In this way, the space between the fixed seat 31 and the movable seat 33 can be fully utilized to reduce the space occupied by the hinge mechanism 30.

[0032] The movable seat 33 is located on one side of the rotation axis of the door body 20 where the first connecting rod 321 and the fixed seat 31 are rotatably engaged (i.e., the first rotating pair 301). In other words, the movable seat 33 is located on the upper or lower side of the door body 20, rather than on the side facing the housing 10. In this way, the hinge mechanism 30 can be located on the upper or lower side of the door body 20, so that it can support and connect the door body 20 without occupying the internal space of the housing 10.

[0033] In some embodiments, at least a portion of the side of the first link 321 near the fixed base 31 and at least a portion of the side of the third link 323 near the fixed base 31 are flush, and / or at least a portion of the side of the first link 321 near the movable base 33 and at least a portion of the side of the third link 323 near the movable base 33 are flush. In other words, at least a portion of the upper surfaces of the first link 321 and the third link 323 are flush and / or at least a portion of the lower surfaces of the first link 321 and the third link 323 are flush. In this way, the space occupied by the first link 321 and the third link 323 in the direction of the rotation axis of the first rotary joint 301 can be made to overlap as much as possible, thereby reducing the space occupied by the linkage mechanism 32.

[0034] In some embodiments, the second link 322 further includes a plug-in portion 3221, and a plug-in hole 331 is provided on the movable seat 33. The plug-in portion 3221 extends into the plug-in hole 331, and the plug-in hole 331 allows the plug-in portion 3221 to rotate relative to the movable seat 33. The plug-in portion 3221 and the plug-in hole 331 cooperate to form the aforementioned third rotating pair 303.

[0035] Furthermore, in some embodiments, the sliding part 3234 is disposed on the side of the third link 323 near the movable seat 33, the insertion part 3221 is disposed on the side of the second link 322 near the movable seat 33, and the third link 323 is located on the side of the second link 322 away from the movable seat 33. Figure 13 The sliding portion 3234 includes a first connecting segment 3234A and a sliding segment 3234B connected to each other, with the sliding segment 3234B extending into the track groove 330. The plug-in portion 3221 includes a second connecting segment 3221A and a plug-in segment 3221B connected to each other, with the plug-in segment 3221B inserted into the plug-in hole 331. The first connecting segment 3234A can connect the sliding segment 3234B to the body of the third link 323, and the second connecting segment 3221A can connect the plug-in segment 3221B to the body of the second link 322. Optionally, the length of the first connecting segment 3234A is greater than the length of the second connecting segment 3221A.

[0036] In some embodiments, the first connecting segment 3234A has a first mounting plane 3234C facing the movable seat 33. The sliding segment 3234B is connected to the first mounting plane 3234C, the second connecting segment 3221A has a second mounting plane 3221C facing the movable seat 33, and the plug-in segment 3221B is connected to the second mounting plane 3221C. In other words, the stepped surface between the first connecting segment 3234A and the sliding segment 3234B is the first mounting plane 3234C, and the stepped surface between the second connecting segment 3221A and the plug-in segment 3221B is the second mounting plane 3221C. After the hinge mechanism 30 is installed with the door body 20, the sliding part 3234 and the plug-in part 3221 are directly connected to the door body 20 and need to support the door body 20. The first mounting plane 3234C and the second mounting plane 3221C can achieve the support and load-bearing capacity of the door body 20. Optionally, the first mounting plane 3234C and the second mounting plane 3221C are flush, so that the door body 20 can be installed on the same plane after being installed on the hinge mechanism 30, so that the hinge mechanism 30 can stably support the door body 20, reduce the installation difficulty and improve the smoothness of rotation.

[0037] In some embodiments, combined with Figure 2The first link 321 is arc-shaped and recessed away from the third link 323. The recessed portion of the first link 321 is used to accommodate part of the third link 323 when the hinge mechanism 30 is in the closed state. In this way, the first link 321 can accommodate the movement of the third link 323 while rotatably connecting the second link 322 and the fixed base 31, reducing potential interference between the hinge mechanism 30 and the first link 321 during the closing process. Furthermore, by accommodating the third link 323 and reducing interference, the first link 321 can be simultaneously positioned between the fixed base 31 and the second link 322, with minimal height difference, or even at the same height. In summary, by making the first link 321 arc-shaped, the space occupied by the linkage mechanism 32 can be reduced from multiple angles. Optionally, the center of curvature of the first link 321 is located on the side of the line connecting the axis of the first revolute joint 301 and the axis of the second revolute joint 302, close to the third link 323.

[0038] It should be noted that the line connecting the first rotary joint 301 and the second rotary joint 302 refers to the line connecting the projection point of the rotation axis of the first rotary joint 301 on the XY plane and the projection point of the rotation axis of the second rotary joint 302 on the XY plane. The connection between other rotary joints in this embodiment is similar and will not be described again.

[0039] In some embodiments, the second link 322 extends along the line connecting the rotation axis of the second rotary joint 302 and the rotation axis of the third rotary joint 303. In this way, the second link 322 can connect the first link 321 and the third link 323 with a smaller volume, thereby reducing the space occupied by the second link 322.

[0040] Combination Figure 4 In some embodiments, the third link 323 includes a fixed connecting portion 3231, a first connecting portion 3232, and a second connecting portion 3233. The first connecting portion 3232 and the second connecting portion 3233 are respectively connected to the fixed connecting portion 3231.

[0041] The third link 323 is rotatably connected to the fixed base 31 via the fixed connection part 3231 to form a fourth rotary joint 304. The third link 323 is rotatably connected to the second link 322 via the first connection part 3232 to form a fifth rotary joint 305. The sliding part 3234 is provided on the second connection part 3233.

[0042] In the embodiments of this application, the line connecting the axis of the fourth rotary joint 304 and the axis of the fifth rotary joint 305 forms an acute angle with the line connecting the axis of the fourth rotary joint 304 and the axis of the sliding part 3234. This arrangement allows the third link 323 to effectively connect the second link 322 and the movable seat 33 with a small distance and angle while rotating in conjunction with the fixed seat 31.

[0043] In some embodiments, the second connecting portion 3233 extends along the line connecting the rotation axis of the fourth revolute joint 304 and the axis of the sliding portion 3234. The first connecting portion 3232 extends along the line connecting the rotation axis of the fourth revolute joint 304 and the rotation axis of the fifth revolute joint 305. In this way, a smaller volume third link 323 can be formed, reducing space occupation. On the other hand, the angle between the extending direction of the first connecting portion 3232 and the extending direction of the second connecting portion 3233 is an acute angle. When the hinge mechanism 30 is closed, the recessed portion of the first link 321 is at least used to accommodate the first connecting portion 3232 to reduce the possibility of interference between the first connecting portion 3232 and the first link 321.

[0044] In some embodiments, the movable seat 33 is provided with a track groove 330 that matches the sliding part 3234 and a insertion hole 331 for the insertion part 3221 to insert into. The groove opening of the track groove 330 faces the same direction as the opening of the insertion hole 331. The insertion part 3221 extends into the insertion hole 331 along the rotation axis of the insertion part 3221, and the sliding part 3234 extends into the track groove 330 along the rotation axis of the insertion part 3221. In this way, when the linkage mechanism 32 cooperates with the door body 20, it can be directly inserted after being aligned along the axial direction. The hinge mechanism 30 and the movable seat 33 formed in this way are simple to manufacture, and the assembly of the hinge mechanism 30 and the movable seat 33 is simple.

[0045] In some embodiments, the door 20 has a critical angle during opening. When the opening angle of the door 20 relative to the housing 10 is less than the critical angle, the rotation center of the third rotary joint 303 moves in the second direction along the direction of the first side plate 11 towards the second side plate 12. When the opening angle of the door 20 relative to the housing 10 is greater than the critical angle, the rotation center of the third rotary joint 303 moves in the second direction along the direction of the first side plate 11 away from the second side plate 12. In other words, during the opening of the door 20, the rotation center of the third rotary joint 303 moves in the negative direction of the X-axis, and after exceeding the critical angle, the rotation center of the third rotary joint 303 moves in the positive direction of the X-axis. Optionally, the critical angle is between 25 degrees and 45 degrees, for example, 30 degrees.

[0046] Combination Figure 3In some embodiments, the track groove 330 includes a first track segment 3301 and a second track segment 3302 that are interconnected. The radius of curvature of the first track segment 3301 is smaller than that of the second track segment 3302. The first track segment 3301 is a curve, and the second track segment 3302 is either a curve or a straight line. The movement of the door 20 can be guided and restricted by the sliding part 3234 through the track groove 330. By setting the radii of curvature of the first track segment 3301 and the second track segment 3302 to be different, and the radius of curvature of the first track segment 3301 being smaller than that of the second track segment 3302, the door 20 can be guided differently at different stages of rotation, thereby adapting to the movement trajectory of the door 20 at different opening angles.

[0047] In some embodiments, the radius of curvature of the track groove 330 gradually increases from the end near the front wall 21 toward the end away from the front wall 21. In other words, the radius of curvature of the track groove 330 gradually changes, with the smallest radius of curvature at the end near the front wall 21 and the largest radius of curvature at the end away from the front wall 21 (i.e., near the side wall 23). Optionally, the angle between the tangent direction of the track groove 330 and the first direction gradually increases, while the angle between the tangent direction of the track groove 330 and the second direction gradually decreases.

[0048] In some embodiments, the hinge mechanism 30 has a closed state and a fully open state. The closed state of the hinge mechanism 30 corresponds to the closed state of the door 20, and the fully open state of the hinge mechanism 30 corresponds to the fully open state of the door 20. When the hinge mechanism 30 is in the closed state, the sliding part 3234 is inserted at the end of the first track segment 3301 away from the second track segment 3302. When the hinge mechanism 30 is in the fully open state, the sliding part 3234 is inserted at the end of the second track segment 3302 away from the first track segment 3301. With this configuration, when the door 20 is in the closed state, while the housing 10 limits the door 20, the end of the track groove 330 can limit further movement of the hinge mechanism 30 through the sliding part 3234. When the door 20 is fully open, the hinge mechanism 30 can further restrict the movement of the movable seat 33 by the contact between the sliding part 3234 and the end of the track groove 330, thereby restricting the further rotation of the door 20, so as to reduce the collision between the door 20 and the cabinet or wall caused by the further increase of the door opening.

[0049] In some embodiments, the center of curvature of the first track segment 3301 is located on the side of the track groove 330 away from the first connecting rod 321. The center of curvature of the first track segment 3301 is located on the side of the track groove 330 away from the front wall 21 of the door body 20. The first track segment 3301 is able to smoothly guide the movable seat 33 and the door body 20 to rotate along the desired trajectory through its large curvature and its bending direction.

[0050] In some embodiments, the first trajectory segment 3301 is a curve. Optionally, the first trajectory segment 3301 is a spline curve. The second trajectory segment 3302 is a curve or a straight line. Optionally, the second trajectory segment 3302 can also be a spline curve. The difference between the minimum radius of curvature of the first trajectory segment 3301 and the minimum radius of curvature of the second trajectory segment 3302 is greater than or equal to 20mm. In this way, as the door 20 gradually opens from a closed state, it can be guided by the segment of the first trajectory segment 3301 with a smaller radius of curvature, thus smoothly opening by rotation. Further rotation of the door 20 can allow it to rotate to a larger angle. However, in actual use, the need for a larger opening angle of the door 20 is generally less frequent, and a larger opening angle means a greater likelihood of interference with cabinets or walls. By setting the second trajectory segment 3302 to have a larger radius of curvature, or even setting the second trajectory segment 3302 to be a straight line, a certain degree of resistance can be created to further opening of the door 20.

[0051] In some embodiments, the minimum radius of curvature of the first trajectory segment 3301 is greater than or equal to 6 mm, such as 8 mm or 10 mm. The minimum radius of curvature of the second trajectory segment 3302 is greater than or equal to 30 mm, such as 32 mm or 35 mm.

[0052] In some embodiments, the third rotary joint 303 is located on the door body 20, and the rotation center of the third rotary joint 303 forms a trajectory curve during the process of the hinge mechanism 30 opening from the closed state to the fully open state. This trajectory curve can be the desired motion trajectory of the third rotary joint 303 during the opening process of the door body 20.

[0053] When the opening angle of the door 20 relative to the housing 10 is less than a preset angle, the angle between the tangent direction of the trajectory curve and the X-axis is greater than or equal to 45 degrees. When the opening angle of the door 20 relative to the housing 10 is greater than a preset angle, the angle between the tangent direction of the trajectory curve and the X-axis is less than or equal to 45 degrees. The direction of motion of the trajectory curve is the trajectory of the third rotary joint 303 as the door 20 gradually opens from a closed state. The tangent direction of the trajectory curve refers to the tangent vector of the trajectory curve. Specifically, when the opening angle of the door 20 is less than the preset angle, the angle between the tangent vector of the trajectory curve and the X-axis is greater than 45 degrees. In this case, the third rotary joint 303 can have a large motion component in the negative direction of the Y-axis. The third rotary joint 303 and the door 20 can move away from the X-axis with a large motion component in the Y-axis, thereby allowing the door 20 to quickly move away from the position where the rotation space is restricted. When the door 20 is opened to a greater than preset angle, the restriction on the rotation of the door 20 is reduced, and the angle between the tangent direction of the trajectory curve and the X-axis can be less than or equal to 45 degrees. The door 20 can move to make way for the front of the box 10 more quickly.

[0054] In some embodiments, the preset angle is 70-90 degrees, for example, it can be 75 degrees, 80 degrees or 20 degrees.

[0055] Based on the above embodiments, the motion trajectory of the sliding part 3234 can be determined based on the trajectory curve. Wherein, with the trajectory curve determined, the rotation angle function of the second link 322 can be expressed, i.e., θ = f(Pt), Pt ∈ T. The coordinates of the rotation center of the third revolute joint 303 are (x3, y3), the initial position of the sliding part 3234 is (x6, y6), and the motion trajectory P of the sliding part 3234 satisfies: Here, θ refers to the rotation angle of the third link relative to its initial state during the rotation process.

[0056] The motion trajectory P of the sliding part 3234 can determine the trajectory curve of the trajectory groove 330, and the trajectory curve Q of the trajectory groove 330 satisfies:

[0057] Where a and b are the coordinates of the fourth rotary joint 304 when the door 20 is closed, and ρ is the rotation angle of the door 20 relative to the box 10.

[0058] In some embodiments, the distance between the rotation center of the third rotary joint 303 and the side wall 23 is between 5 and 15 mm, for example, 8 mm, 9 mm, 10 mm, or 12 mm. In other words, when the door 20 is in the closed state, the X-coordinate of the rotation center of the third rotary joint 303 is between -15 mm and -5 mm. The distance between the rotation center of the third rotary joint 303 and the front wall 21 is between 15 and 25 mm, for example, 18 mm, 20 mm, 22 mm, or 24 mm. In other words, when the door 20 is in the closed state, the Y-coordinate of the rotation center of the third rotary joint 303 is between -25 mm and -15 mm.

[0059] Combination Figure 5 , Figure 7 , Figure 9 and Figure 11 In some embodiments, the angle between the line connecting the rotation axis of the first revolute joint 301 and the rotation axis of the second revolute joint 302 and the line connecting the rotation axis of the fourth revolute joint 304 and the rotation axis of the fifth revolute joint 305 is always less than or equal to 45 degrees. This ensures that the linkage mechanism 32 does not encounter dead points during rotation, thus increasing the smoothness of the hinge mechanism 30 during opening and closing.

[0060] In some embodiments, when the hinge mechanism 30 is in the closed state, the angle between the line connecting the rotation axes of the fourth rotary joint 304 and the fifth rotary joint 305 and the line connecting the rotation axes of the third rotary joint 303 and the fifth rotary joint 305 is less than or equal to 20 degrees. In this way, the linkage mechanism 32 can be prevented from causing the door 20 to rotate inwards into the housing 10.

[0061] In some embodiments, when the hinge mechanism 30 is in the closed state, the distance between the rotation axis of the third rotary joint 303 and the rotation axis of the fourth rotary joint 304 (in conjunction with...) Figure 5 L3 in the figure is less than or equal to 5mm. The hinge mechanism 30 in the closed state corresponds to the door 20 closing the box 10. By setting a sufficiently small gap between the rotation axis of the third rotary joint 303 and the rotation axis of the fourth rotary joint 304, the hinge mechanism 30 occupies less space when closed. Based on the aforementioned embodiment, the second link 322 and the third link 323 are set at different heights, and the small gap between the rotation axis of the third rotary joint 303 and the rotation axis of the fourth rotary joint 304 will not cause interference between the second link 322 and the third link 323.

[0062] In some embodiments, when the hinge mechanism 30 is in the closed state, the angle between the line connecting the rotation axis of the third rotary joint 303 and the rotation axis of the fifth rotary joint 305 and the line connecting the rotation axis of the fourth rotary joint 304 and the rotation axis of the fifth rotary joint 305 (in conjunction with...) Figure 5 ∠a) is less than or equal to 20 degrees. In this way, when the hinge mechanism 30 is in the closed state, the second link 322 and the third link 323 can overlap as much as possible, thereby further reducing the space occupied by the link mechanism 32 and reducing the volume of the hinge mechanism 30.

[0063] In some embodiments, when the hinge mechanism 30 is in the closed state, the angle between the line connecting the rotation centers of the third revolute joint 303 and the fifth revolute joint 305 and the line connecting the rotation centers of the fourth revolute joint 304 and the sliding portion 3234 is less than or equal to 40 degrees. This arrangement allows the second link 322 and the third link 323 to be arranged more compactly, thereby reducing the space occupied by the hinge mechanism 30. Optionally, the angle between the extending direction of the first connecting portion 3232 and the extending direction of the second link 322 is less than or equal to 20 degrees, and the angle between the extending direction of the second connecting portion 3233 and the extending direction of the second link 322 is less than or equal to 20 degrees.

[0064] In some embodiments, when the hinge mechanism 30 is in the fully open state, the angle between the line connecting the rotation axes of the third rotary joint 303 and the fifth rotary joint 305 and the line connecting the rotation axes of the fourth rotary joint 304 and the fifth rotary joint 305 is greater than or equal to 90 degrees. This allows the hinge mechanism 30 to open to a sufficient angle, enabling the door 20 to move along a desired trajectory. On the other hand, during the transition of the hinge mechanism 30 from the fully open state to the closed state, the angle between the line connecting the rotation axes of the third rotary joint 303 and the fifth rotary joint 305 and the line connecting the rotation axes of the fourth rotary joint 304 and the fifth rotary joint 305 gradually decreases. That is, during the closing process of the hinge mechanism 30, the angle between the links can be reduced, thereby reducing the space occupied by the linkage mechanism 32.

[0065] In some embodiments, the hinge mechanism 30 is in an open state. As the hinge mechanism 30 gradually transitions from the open state to the closed state, the overlapping area of ​​the projections of the second link 322 and the third link 323 in the axial direction of the first revolute joint 301 gradually increases. In this way, during the closing process, the area occupied by the second link 322 and the third link 323 in the XY plane gradually decreases, thereby making the distribution of the second link 322 and the third link 323 gradually more compact and reducing the space occupied by the linkage mechanism 32 when closed. Optionally, the maximum overlapping area of ​​the projections of the second link 322 and the third link 323 in the axial direction of the first revolute joint 301 is greater than or equal to 30%. Optionally, the maximum overlapping area of ​​the projections of the second link 322 and the first connecting portion 3232 in the axial direction of the first revolute joint 301 is greater than or equal to 80%.

[0066] In some embodiments, when the hinge mechanism 30 is in the fully open state, the distance between the rotation center of the sliding part 3234 and the rotation center of the insertion part 3221 is greater than or equal to twice the sum of the radius of the sliding part 3234 and the radius of the insertion part 3221. As the hinge mechanism 30 gradually opens, the sliding part 3234 and the insertion part 3221 gradually approach each other, reaching their maximum distance when the hinge mechanism 30 is in the fully open state. If the distance between the rotation centers of the sliding part 3234 and the insertion part 3221 is too small when the hinge mechanism 30 is in the fully open state, interference may easily occur between the sliding part 3234 and the insertion part 3221, or between the second link 322 and the third link 323. Optionally, the distance between the rotation centers of the sliding part 3234 and the insertion part 3221 is greater than or equal to 11 mm.

[0067] In some embodiments, the electrical appliance 1 includes two doors 20, both of which are rotatably engaged with the cabinet 10. The two doors 20 are spaced apart along their rotation axes. Taking a refrigerator as an example, the refrigerator cabinet 10 has cavities that perform different functions of refrigeration and freezing. Different cavities require different doors 20 to open and close, and the opening and closing of the different doors 20 are independent of each other. The hinge mechanism 30 provided in this embodiment is disposed between the two doors 20. Figure 12 Each of the two door bodies 20 is provided with a first movable seat 332 and a second movable seat. The first movable seat 332 is installed on one of the door bodies 20, and the second movable seat (not shown) is installed on the other door body 20. The first movable seat 332 and the second movable seat are respectively located on the side of the two door bodies 20 closest to each other, and the first movable seat 332 and the second movable seat are arranged opposite each other.

[0068] In some embodiments, the first linkage mechanism 3201 and the second linkage mechanism 3202 are arranged in a mirror-symmetrical manner.

[0069] The linkage mechanism 32 in this embodiment includes a first linkage mechanism 3201 and a second linkage mechanism 3202. The first linkage mechanism 3201 is rotatably engaged with the fixed base 31, and the second linkage mechanism 3202 is rotatably engaged with the fixed base 31. The rotation axis of the first linkage mechanism 3201 rotatably engaged with the fixed base 31 is coaxially arranged with the corresponding rotation axis of the second linkage mechanism 3202 rotatably engaged with the fixed base 31. In this way, the first linkage mechanism 3201 and the second linkage mechanism 3202 can be fixed separately with a single fixed base 31. Furthermore, by ensuring that the rotation axis of the first linkage mechanism 3201 rotatably engaged with the fixed base 31 is coaxial with the corresponding rotation axis of the second linkage mechanism 3202 rotatably engaged with the fixed base 31, the consistency of the opening trajectories of the two door bodies 20 defined by the first linkage mechanism 3201 and the second linkage mechanism 3202 is increased.

[0070] Combination Figure 13 In some embodiments, the first linkage mechanism 3201 includes a first link 321, a second link 322, and a third link 323. The first link 321 is rotatably engaged with the fixed seat 31, the first link 321 is rotatably engaged with the second link 322, the second link 322 is rotatably engaged with the first movable seat 332, and the third link 323 is rotatably engaged with the fixed seat 31 and the second link 322. The first movable seat 332 is provided with a first track groove, and the third link 323 has a first sliding part 3234. The first sliding part 3234 extends into the first track groove, and the first track groove allows the first sliding part 3234 to move along the first track groove and allows the first sliding part 3234 to rotate relative to the first movable seat 332.

[0071] Combination Figure 14 The second linkage mechanism 3202 includes a fourth link 324, a fifth link 325, and a sixth link 326. The fourth link 324 is rotatably engaged with the fixed seat 31, the fourth link 324 is rotatably engaged with the fifth link 325, the fifth link 325 is rotatably engaged with the second movable seat, and the sixth link 326 is rotatably engaged with the fixed seat 31 and the fifth link 325. The second movable seat is provided with a second track groove, and the sixth link 326 has a second sliding part that extends into the second track groove. The second track groove allows the second sliding part to move along the second track groove and allows the second sliding part to rotate relative to the second movable seat.

[0072] In the above manner, the hinge mechanism 30, while connecting the two door bodies 20 and the box body 10, cooperates with the first movable seat 332 and the second movable seat to restrict the degrees of freedom of the two door bodies 20 relative to the box body 10, thereby allowing each door body 20 to have a degree of freedom of rotation relative to the box body 10. Furthermore, by setting the first link 321, the second link 322, the third link 323, the fourth link 324, the fifth link 325, the sixth link 326, the first track groove, and the second track groove in the linkage mechanism 32, the rotation of the two door bodies 20 can be restricted by the hinge mechanism 30 to move along specific tracks. The states of the fourth link 324, the fifth link 325, and the sixth link 326 during their individual movements correspond to the aforementioned first link 321, second link 322, and third link 323, respectively, and will not be described further.

[0073] Specifically, the rotation axis of the first link 321 rotating with the fixed base 31 and the rotation axis of the fourth link 324 rotating with the fixed base 31 are coaxially arranged. The rotation axis of the third link 323 rotating with the fixed base 31 and the rotation axis of the sixth link 326 rotating with the fixed base 31 are coaxially arranged. The first link 321 and the fourth link 324 are respectively fixed on opposite sides of the fixed base 31. For the first link mechanism 3201 and the second link mechanism 3202 on both sides of the fixed base 31, the first link 321 and the fourth link 324 perform the same function. Setting the rotation axes of the first link 321 and the fourth link 324 to be coaxial can save space without affecting the function of the hinge mechanism 30. The third link 323 and the sixth link 326 are fixed on opposite sides of the fixed base 31. For the first link mechanism 3201 and the second link mechanism 3202 on both sides of the fixed base 31, the first link 321 and the fourth link 324 have the same function. Setting the rotation axes of the third link 323 and the sixth link 326 to be coaxial can save space without affecting the function of the hinge mechanism 30.

[0074] In some embodiments, a first insertion hole is provided on the first movable seat 332, a second insertion hole is provided on the second movable seat, a second connecting rod 322 has a first insertion portion 3221, and a fifth connecting rod 325 has a second insertion portion. The first insertion portion 3221 is rotatably engaged with the first insertion hole, and the second insertion portion is rotatably engaged with the second insertion hole. The first insertion hole allows the first insertion portion 3221 to rotate relative to the first movable seat 332. The second insertion hole allows the second insertion portion to rotate relative to the first movable seat 332. The opening directions of the first and second insertion holes are opposite to each other, thereby reducing the assembly difficulty of the door body 20 and allowing the two door bodies 20 to be assembled from both sides of the hinge mechanism 30 via insertion.

[0075] In some embodiments, a first sliding portion 3234 is disposed on the side of the third link 323 near the first movable seat 332, and a first insertion portion 3221 is disposed on the side of the second link 322 near the first movable seat 332. The third link 323 is located on the side of the second link 322 away from the first movable seat 332. The sliding portion 3234 includes a first connecting segment 3234A and a first sliding segment 3234B connected to each other, with the first sliding segment 3234B extending into a first track groove. The first insertion portion 3221 includes a second connecting segment 3221A and a first insertion segment 3221B connected to each other, with the first insertion segment 3221B inserted into a first insertion hole. Optionally, the length of the first connecting segment 3234A is greater than the length of the second connecting segment 3221A.

[0076] The first connecting segment 3234A has a first mounting plane 3234C facing the first movable seat 332, the first sliding segment 3234B is connected to the first mounting plane 3234C, the second connecting segment 3221A has a second mounting plane 3221C facing the first movable seat 332, the first plug-in segment 3221B is connected to the second mounting plane 3221C, and the first mounting plane 3234C and the second mounting plane 3221C are flush.

[0077] That is, the stepped surface between the first connecting section 3234A and the first sliding section 3234B is the first mounting plane 3234C, and the stepped surface between the second connecting section 3221A and the first insertion section 3221B is the second mounting plane 3221C. After the hinge mechanism 30 is installed with the door body 20, the first sliding part 3234 and the first insertion part 3221 are directly connected to the door body 20 and need to support it. The first mounting plane 3234C and the second mounting plane 3221C can provide this support and load-bearing capacity. The first mounting plane 3234C and the second mounting plane 3221C are flush, allowing the door body 20 to be mounted on the same plane after being installed with the hinge mechanism 30. This enables the hinge mechanism 30 to stably support the door body 20, reducing installation difficulty and improving the smoothness of rotation.

[0078] In some embodiments, the second sliding portion is disposed on the side of the sixth link 326 near the second movable seat, and the second insertion portion is disposed on the side of the fifth link 325 near the second movable seat. The sixth link 326 is located on the side of the fifth link 325 away from the second movable seat. The second sliding portion includes a third connecting segment and a second sliding segment connected to each other, and the second sliding segment extends into the second track groove. The second insertion portion includes a fourth connecting segment and a second insertion segment connected to each other, and the second insertion segment is inserted into the second insertion hole. Optionally, the length of the third connecting segment is greater than the length of the fourth connecting segment.

[0079] The third connecting section forms a third mounting plane facing the second movable seat, the second sliding section is connected to the third mounting plane, the fourth connecting section forms a fourth mounting plane facing the second movable seat, the second plug-in section is connected to the fourth mounting plane, and the third mounting plane and the fourth mounting plane are flush.

[0080] That is, the stepped surface between the third connecting section and the second sliding section is the third mounting plane, and the stepped surface between the fourth connecting section and the second insertion section is the fourth mounting plane. After the hinge mechanism 30 is installed with the door body 20, the second sliding part and the second insertion part are directly connected to the door body 20 and need to support the door body 20. The third and fourth mounting planes provide this support. The third and fourth mounting planes are flush, allowing the door body 20 to be mounted on the same plane after being installed with the hinge mechanism 30. This enables the hinge mechanism 30 to stably support the door body 20, reducing installation difficulty and improving the smoothness of rotation.

[0081] In some embodiments, the plane of symmetry between the first linkage 3201 and the second linkage 3202 is perpendicular to the axis of rotation of the first linkage 321 in rotational engagement with the fixed base 31.

[0082] Combination Figure 15In some embodiments, the hinge mechanism 30 further includes a first hinge member 341 and a second hinge member 342. The first hinge member 341 passes through the fixed seat 31. A first connecting rod 321 is rotatably engaged with the portion of the first hinge member 341 located on one side of the fixed seat 31, and a fourth connecting rod 324 is rotatably engaged with the portion of the first hinge member 341 located on the other side of the fixed seat 31. The second hinge member 342 passes through the fixed seat 31. A third connecting rod 323 is rotatably engaged with the portion of the second hinge member 342 located on one side of the fixed seat 31, and a sixth connecting rod 326 is rotatably engaged with the portion of the second hinge member 342 located on the other side of the fixed seat 31. The first hinge member 341 enables the rotatable connection of the first and fourth connecting rods 321 and 324 to the fixed seat 31, while the second hinge member 342 enables the rotatable connection of the third and sixth connecting rods 323 and 326 to the fixed seat 31. In this way, the number of parts in the hinge mechanism 30 can be reduced, the cost can be lowered, and the space occupied by the hinge mechanism 30 can also be reduced.

[0083] In some embodiments, the first movable seat 332, the first linkage mechanism 3201, the fixed seat 31, the second linkage mechanism 3202, and the second movable seat are arranged sequentially at intervals along the rotation axis in which the first linkage 321 and the fixed seat 31 rotatably engage. Thus, when the door 20 is closed, the space occupied by the fixed seat 31, the first linkage mechanism 3201, the second linkage mechanism 3202, the first movable seat 332, and the second movable seat in the horizontal direction can be reduced, allowing them to be accommodated between the door 20 and other components when the door 20 is closed.

[0084] In some embodiments, in the first linkage mechanism 3201, the first link 321 and the third link 323 are closer to the fixed base 31 than the second link 322. In the second linkage mechanism 3202, the fourth link 324 and the sixth link 326 are closer to the fixed base 31 than the fifth link 325. In this way, the positions of the links can be rationally planned without affecting the connection relationships between the individual links, thereby making the connection relationships between components more space-efficient.

[0085] In some embodiments, when both the first linkage mechanism 3201 and the second linkage mechanism 3202 are in the closed state, their projections on the fixed base 31 coincide. This ensures that when the hinge mechanism 30 is closed, the first linkage mechanism 3201 and the second linkage mechanism 3202 are housed in approximately the same orientation, and also facilitates ensuring the consistency of the two door bodies 20 when closed.

[0086] In some embodiments, at least a portion of the first track groove is a curved groove, and at least a portion of the second track groove is a curved groove. The movement of the two door bodies 20 can be guided and restricted by the first track groove and the second track groove respectively in cooperation with the hinge mechanism 30, and the curved groove can make the shape of the first track groove and the second track groove adapt to the movement trajectory of the door body 20.

[0087] In some embodiments, the first track groove includes a first track segment 3301 and a second track segment 3302 that are interconnected, wherein the radius of curvature of the first track segment 3301 is smaller than the radius of curvature of the second track segment 3302. The second track groove includes a third track segment and a fourth track segment that are interconnected, wherein the radius of curvature of the third track segment is smaller than the radius of curvature of the fourth track segment. By setting the radii of curvature of the first track segment 3301 and the second track segment 3302 to be different, and the radius of curvature of the first track segment 3301 being smaller than the radius of curvature of the second track segment 3302, the door 20 can be guided differently at different stages of rotation, thereby adapting to the movement trajectory of the door 20 at different opening angles. By setting the radii of curvature of the third track segment and the fourth track segment to be different, and the radius of curvature of the third track segment being smaller than the radius of curvature of the fourth track segment, the door 20 can be guided differently at different stages of rotation, thereby adapting to the movement trajectory of the door 20 at different opening angles.

[0088] In some embodiments, the minimum radius of curvature of the first trajectory segment 3301 is greater than or equal to 6 mm, for example, 8 mm or 10 mm. The minimum radius of curvature of the second trajectory segment 3302 is greater than or equal to 30 mm, for example, 32 mm or 35 mm. In some embodiments, the minimum radius of curvature of the third trajectory segment is greater than or equal to 6 mm, for example, 8 mm or 10 mm. The minimum radius of curvature of the fourth trajectory segment is greater than or equal to 30 mm, for example, 32 mm or 35 mm.

[0089] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A hinge mechanism for connecting a box body and a door body, characterized in that, include: A fixed seat is provided on the box body and cooperates with a first movable seat and a second movable seat provided on the door body through a first linkage mechanism and a second linkage mechanism, respectively. The first movable seat and the second movable seat are respectively disposed on both sides of the fixed seat. The first movable seat cooperates with the fixed seat through a first linkage mechanism, and the second movable seat cooperates with the fixed seat through a second linkage mechanism. The first movable seat and the fixed seat are rotatably engaged through the first linkage mechanism, and the second movable seat and the fixed seat are rotatably engaged through the second linkage mechanism. When both the first linkage mechanism and the second linkage mechanism are in the closed state, the first linkage mechanism and the second linkage mechanism are arranged in a mirror symmetrical manner. The first linkage mechanism is rotatably engaged with the fixed base, and the second linkage mechanism is rotatably engaged with the fixed base; The rotation axis of the first linkage mechanism that rotates with the fixed base is coaxial with the rotation axis of the corresponding second linkage mechanism that rotates with the fixed base.

2. The hinge mechanism according to claim 1, characterized in that: The first linkage mechanism includes a first link, a second link, and a third link. The first link is rotatably engaged with the fixed seat, the first link is rotatably engaged with the second link, the second link is rotatably engaged with the first movable seat, and the third link is rotatably engaged with the fixed seat and the second link. The first movable seat is provided with a first track groove, and the third link has a first sliding part that extends into the first track groove. The first track groove allows the first sliding part to move along the first track groove and allows the first sliding part to rotate relative to the first movable seat. The second linkage mechanism includes a fourth link, a fifth link, and a sixth link. The fourth link is rotatably engaged with the fixed seat, the fourth link is rotatably engaged with the fifth link, the fifth link is rotatably engaged with the second movable seat, and the sixth link is rotatably engaged with the fixed seat and the fifth link. The second movable seat is provided with a second track groove, and the sixth link has a second sliding part that extends into the second track groove. The second track groove allows the second sliding part to move along the second track groove and allows the second sliding part to rotate relative to the second movable seat. The rotation axis of the first connecting rod rotatably engaging with the fixed base and the rotation axis of the fourth connecting rod rotatably engaging with the fixed base are coaxially arranged, and the rotation axis of the third connecting rod rotatably engaging with the fixed base and the rotation axis of the sixth connecting rod rotatably engaging with the fixed base are coaxially arranged.

3. The hinge mechanism according to claim 2, characterized in that: The plane of symmetry of the first linkage mechanism and the second linkage mechanism is perpendicular to the axis of rotation of the first linkage and the fixed seat; the hinge mechanism further includes a first hinge member and a second hinge member, the first hinge member passes through the fixed seat, the first linkage and the portion of the first hinge member located on one side of the fixed seat are rotatably engaged, and the fourth linkage and the portion of the first hinge member located on the other side of the fixed seat are rotatably engaged. The second hinge member passes through the fixed seat, the third link is rotatably engaged with the portion of the second hinge member located on one side of the fixed seat, and the sixth link is rotatably engaged with the portion of the second hinge member located on the other side of the fixed seat.

4. The hinge mechanism according to claim 2, characterized in that: The first movable seat, the first linkage mechanism, the fixed seat, the second linkage mechanism, and the second movable seat are arranged sequentially at intervals along the rotation axis direction in which the first linkage and the fixed seat rotate in cooperation.

5. The hinge mechanism according to claim 4, characterized in that: In the first linkage mechanism, the first link and the third link are closer to the fixed base than the second link; In the second linkage mechanism, the fourth and sixth links are closer to the fixed base than the fifth link.

6. The hinge mechanism according to claim 1, characterized in that: When both the first linkage mechanism and the second linkage mechanism are in the closed state, their projections on the fixed base coincide.

7. The hinge mechanism according to claim 2, characterized in that: At least a portion of the first track groove is a curved groove, and at least a portion of the second track groove is a curved groove.

8. The hinge mechanism according to claim 7, characterized in that: The first trajectory slot includes a first trajectory segment and a second trajectory segment that are interconnected. The first trajectory segment is a curve, and the second trajectory segment is a curve or a straight line. The second trajectory slot includes a third trajectory segment and a fourth trajectory segment that are interconnected. The third trajectory segment is a curve, and the fourth trajectory segment is a curve or a straight line.

9. The hinge mechanism according to claim 2, characterized in that: The first movable seat is provided with a first insertion hole, the second movable seat is provided with a second insertion hole, the second connecting rod has a first insertion part, the fifth connecting rod has a second insertion part, the first insertion part is rotatably engaged with the first insertion hole, and the second insertion part is rotatably engaged with the second insertion hole.

10. The hinge mechanism according to claim 9, characterized in that: The first sliding part is disposed on the side of the third link near the first movable seat, the first plug-in part is disposed on the side of the second link near the first movable seat, the third link is located on the side of the second link away from the first movable seat, the sliding part includes a first connecting section and a first sliding section connected to each other, the first sliding section extends into the first track groove; the first plug-in part includes a second connecting section and a first plug-in section connected to each other, the first plug-in section is inserted into the first plug-in hole; The first connecting segment has a first mounting plane facing the first movable seat, the first sliding segment is connected to the first mounting plane, the second connecting segment has a second mounting plane facing the first movable seat, the first plug-in segment is connected to the second mounting plane, and the first mounting plane and the second mounting plane are flush.

11. The hinge mechanism according to claim 9, characterized in that: The second sliding part is disposed on the side of the sixth link near the second movable seat, and the second plug-in part is disposed on the side of the fifth link near the second movable seat. The sixth link is located on the side of the fifth link away from the second movable seat. The second sliding part includes a third connecting section and a second sliding section connected to each other, and the second sliding section extends into the second track groove. The second plug-in part includes a fourth connecting section and a second plug-in section connected to each other, and the second plug-in section is inserted into the second plug-in hole. The third connecting segment forms a third mounting plane facing the second movable seat, the second sliding segment is connected to the third mounting plane, the fourth connecting segment forms a fourth mounting plane facing the second movable seat, the second plug-in segment is connected to the fourth mounting plane, and the third mounting plane and the fourth mounting plane are flush.

12. An electrical appliance, characterized in that, include: Box; The door is rotatably connected to the housing via a hinge mechanism as described in any one of claims 1-11, wherein the door can be closed or the housing can be opened by rotation; The electrical equipment includes two doors, both of which are rotatably engaged with the housing. The two doors are spaced apart in the direction of their rotation axes. The hinge mechanism is disposed between the two doors. The first movable seat is installed on one of the doors, and the second movable seat is installed on the other door.

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