Door opening device for a refrigerator, refrigerator

Abstract

The application relates to the technical field of refrigerators, and discloses a door opening and closing device for a refrigerator. The door opening and closing device comprises a first hinge plate adapted to be connected with a body, a transmission assembly comprising a second hinge plate and a rotating piece, the second hinge plate being adapted to be connected with a door body, the rotating piece being matched with the second hinge plate and used for driving the second hinge plate to rotate along a preset direction at a first speed, wherein the preset direction is opposite to the direction in which the door body drives the second hinge plate to rotate when the door is opened, under the action of an opening force, the door body drives the second hinge plate to rotate at a second speed, and the second speed is greater than the first speed; and a connecting rod, a first end of the connecting rod being rotationally connected with the first hinge plate through a rotating shaft, and a second end of the connecting rod being rotationally connected with the transmission assembly through a rotating shaft. The application can avoid interference between the door body and other components during the opening process of the door body, and has high structural strength and high reliability. The application further discloses a refrigerator.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, specifically to a door opening and closing device for a refrigerator and a refrigerator. Background Technology

[0002] Currently, when refrigerator doors are opened, the large turning radius of the door edge makes them prone to interference and collisions. In many cases, a recessed area needs to be installed at a corresponding position on the body to allow the door to open and close smoothly, which limits both the door structure and the appearance of the refrigerator.

[0003] To prevent the door from easily interfering with other structures when opened, related technology discloses a hinge mechanism for a refrigerator. The hinge assembly is connected to the door and includes a limiting part; the hinge seat is adapted to connect to the refrigerator body and includes a limiting engagement part. In the initial state, under external force, the limiting part and the limiting engagement part engage to guide the hinge assembly to sequentially translate and rotate away from the hinge seat relative to it, thereby causing the door to sequentially translate and rotate away from the refrigerator body, thus opening the door. The limiting part includes a limiting protrusion; the limiting engagement part includes a limiting groove, which includes a straight groove segment and a curved groove segment. The engagement of the limiting protrusion and the straight and curved groove segments enables the door to first translate and then rotate.

[0004] While the related technologies avoid the door from easily interfering with other structures when opened, at least the following problems have been found in the process of implementing the embodiments of this disclosure: The limiting groove has a weak structure and is easily deformed, which can cause the door to open unevenly or even be unable to open at all. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a door opening and closing device and a refrigerator for a refrigerator, in order to solve the problem in related technologies where the door opening process is not smooth or even impossible to open due to the weak limiting groove structure.

[0007] According to a first aspect of the present invention, a door opening and closing device for a refrigerator is provided. The refrigerator includes a door and a body, the door being rotatably connected to the body to open or close the body. The door opening and closing device includes: a first hinge plate adapted to be connected to the body; a transmission assembly including a second hinge plate and a rotating member, the second hinge plate being adapted to be connected to the door, the rotating member cooperating with the second hinge plate to drive the second hinge plate to rotate along a preset direction at a first speed, wherein the preset direction is opposite to the direction in which the door drives the second hinge plate to rotate when the door is opened, and under the action of an opening force, the door drives the second hinge plate to rotate at a second speed, the second speed being greater than the first speed; and a connecting rod, the first end of the connecting rod being rotatably connected to the first hinge plate via a rotating shaft, and the second end of the connecting rod being rotatably connected to the transmission assembly via a rotating shaft.

[0008] Optionally, the rotating component is a driven gear, and the transmission assembly further includes: a driving component, which is drivenly connected to the driven gear and used to drive the driven gear to rotate; the second hinge plate is provided with gear teeth, and the driven gear meshes with the gear teeth to drive the second hinge plate to rotate along the preset direction.

[0009] Optionally, the driving component is a drive gear, which is connected to the second hinge plate via a rotating shaft, and the drive gear and the second hinge plate can rotate relative to each other. The second hinge plate drives the drive gear to rotate, and the drive gear drives the driven gear to rotate. The drive gear, the driven gear, and the second end of the connecting rod are connected via the rotating shaft, and the radius of the drive gear is larger than the radius of the driven gear.

[0010] Optionally, the distance between the rotation center of the driving gear and the rotation axis is greater than the distance between the rotation center of the second hinge plate and the rotation axis, so that the second hinge plate drives the driving gear to rotate, and the driving gear drives the driven gear to rotate.

[0011] Optionally, the door opening and closing device further includes: a rocker arm, wherein the rotating shaft is disposed at one end of the rocker arm and rotatably connected to the one end of the rocker arm, and the rotating shaft is disposed at the other end of the rocker arm, such that the distance between the rotation center of the drive gear and the rotating shaft is greater than the distance between the rotation center of the second hinge plate and the rotating shaft.

[0012] Optionally, the door opening and closing device further includes: a first guide portion, which cooperates with the rotating member, wherein during the door opening process, the rotating member rotates along the surface of the first guide portion around the rotation axis to guide the rotating member to revolve around the rotation axis.

[0013] Optionally, the rotating component is a driven gear; the first guide portion is a first arc-shaped rack provided on the first hinge plate extending in the direction from the body to the door body, the center of the circle containing the first arc-shaped rack is located on the axis of the rotating shaft, and the first arc-shaped rack meshes with the driven gear so that the driven gear moves along the first arc-shaped rack.

[0014] Optionally, the door opening and closing device further includes a second guide portion, which cooperates with the driving member. During the door opening process, the driving member rotates along the surface of the second guide portion around the rotation axis to guide the driving member to revolve around the rotation axis.

[0015] Optionally, the driving component is a drive gear; the second guide portion is a first hinge plate with a second arc-shaped rack extending along the direction from the body to the door body, the center of the circle containing the second arc-shaped rack is located on the axis of the rotating shaft, and the second arc-shaped rack meshes with the drive gear so that the drive gear moves along the second arc-shaped rack.

[0016] According to a second aspect of the present invention, a refrigerator is provided, comprising: a body; a door rotatably connected to the body to open or close the body; and a door opening and closing device for a refrigerator as described in any of the above embodiments, wherein a first hinge plate is connected to the body and a second hinge plate is connected to the door.

[0017] The door opening and closing device and refrigerator provided in this disclosure can achieve the following technical effects: When the door opens under the action of opening force, the door body rotates relative to the main body, and the second hinge plate rotates outward with the door body, driving the second end of the connecting rod to move. During the rotation of the second hinge plate, the rotary component is rotatably connected to the second hinge plate, driving the second hinge plate to rotate in the opposite direction, compensating for the speed of the second hinge plate rotating around the first end of the connecting rod. At the same time, as the connecting rod moves with the second hinge plate, the second hinge plate moves outward while rotating relative to the first hinge plate. The outward movement increases the distance between the door body and the main body during the opening process, avoiding interference and collision of the door body. Moreover, this application achieves the door body's non-interference with other components by driving the second hinge plate in the opposite direction through the rotary component, and does not have weak structures such as limit grooves. Therefore, the door opening and closing device in this application has high structural strength and high reliability.

[0018] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a structural schematic diagram of a refrigerator from a first-view perspective when the door is in the closed position, provided in an embodiment of this disclosure; Figure 2 This is a structural schematic diagram of a refrigerator from a second perspective when the door is in the closed position, provided in an embodiment of this disclosure; Figure 3 yes Figure 1 Enlarged structural diagram of section A in the middle; Figure 4 This is a structural schematic diagram of a refrigerator from a third-person perspective when the door is in the closed position, provided in an embodiment of this disclosure; Figure 5 yes Figure 2 Enlarged structural diagram of section B in the middle; Figure 6 This is a structural schematic diagram of a refrigerator from a first-view perspective when the door is in a half-open position, provided in an embodiment of this disclosure; Figure 7 yes Figure 6 Enlarged structural diagram of section C; Figure 8 This is a structural schematic diagram of a refrigerator from a second perspective when the door is in a half-open position, provided in an embodiment of this disclosure; Figure 9 yes Figure 8 Enlarged structural diagram of section D in the middle; Figure 10 This is a structural schematic diagram of a refrigerator from a first-view perspective when the door is in the fully open position, provided in an embodiment of this disclosure; Figure 11 yes Figure 10 Enlarged structural diagram of section E; Figure 12 This is a structural schematic diagram of a refrigerator from a second perspective when the door is in the fully open position, provided in an embodiment of this disclosure; Figure 13 yes Figure 12 Enlarged structural diagram of section F in the middle; Figure 14 An exploded view of a door opening and closing device is provided in this embodiment.

[0020] Figure label: 10. First hinge plate; 101. First screw hole; 102. Rotation hole; 103. First fixing part; 104. Rotating shaft mounting part; 105. Rack setting part; 106. First arc-shaped rack; 107. Second arc-shaped rack; 108. Rotation hole; 2. Transmission assembly; 21. Second hinge plate; 211. Second screw hole; 212. Second fixing part; 213. Rotating part; 214. Through hole; 216. Gear tooth; 22. Driven gear; 23. Driving gear; 24. Rotating shaft; 25. Rotating shaft; 26. Rocker arm; 30. Connecting rod; 301. First end; 302. Second end; 303. First connecting rod hole; 304. Second connecting rod hole; 40. Rotating shaft; 100. Refrigerator; 1002. Door body; 1003. Main body; 1004. Door opening and closing device. Detailed Implementation

[0021] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0025] Unless otherwise stated, the term "multiple" means two or more.

[0026] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0028] Combination Figure 1-14 As shown, this embodiment of the present disclosure provides a door opening and closing device for a refrigerator 100. The refrigerator 100 includes a body 1003 and a door 1002. The door 1002 is rotatably connected to the body 1003 to open or close the body 1003.

[0029] The door opening and closing device can be used to open the door 1002 of the refrigerator 100, or it can be used in the door-in-door structure of the refrigerator 100.

[0030] The door opening and closing device can be used to open the door 1002 of the refrigerator 100. The main body 1003 is the cabinet, which defines the refrigerator compartment and the freezer compartment. The door 1002 covers the refrigerator compartment and the freezer compartment and is used to open or close the refrigerator compartment and the freezer compartment.

[0031] like Figure 7 and Figure 8 As shown, for the door-in-door refrigerator 100, the door opening / closing device 1004 can be used not only to open the door 1002 but also on the door 1002 itself. Specifically, the door 1002 includes a main door and a secondary door. The secondary door is rotatably located on the main door and, together with the main door, defines the refrigeration or freezing space. When the door opening / closing device is used in a door-in-door structure, the door 1002 in this application is the secondary door, and the main body 1003 is the main door. In this case, the opening force is applied to the secondary door.

[0032] The door opening and closing device includes a first hinge plate 10, a transmission assembly 2, and a connecting rod 30.

[0033] The first hinge plate 10 is connected to the body 1003, such as Figure 3 and Figure 5As shown, the first hinge plate 10 is connected to one end of the body 1003. Optionally, the first hinge plate 10 is fixedly connected to the body 1003, for example, by fasteners such as screws or welding. Figure 14 As shown, the first hinge plate 10 is provided with a first screw hole 101, and the screw passes through the first screw hole 101 to achieve a fixed connection between the first hinge plate 10 and the body 1003.

[0034] The transmission assembly 2 includes a second hinge plate 21 and a rotating component. The second hinge plate 21 is adapted to connect with the door body 1002, such as... Figure 3 and Figure 5 As shown, the second hinge plate 21 is connected to one end of the door body 1002. Optionally, the second hinge plate 21 is fixedly connected to the door body 1002, for example, by fasteners such as screws or welding. Figure 14 As shown, the second hinge plate 21 is provided with a second screw hole 211, and the screw passes through the second screw hole 211 to achieve a fixed connection between the second hinge plate 21 and the door body 1002.

[0035] The rotating component is rotatably connected to the second hinge plate 21 and is used to drive the second hinge plate 21 to rotate in a preset direction at a first speed. The preset direction is opposite to the direction in which the door body 1002 drives the second hinge plate 21 to rotate when the door is opened.

[0036] Taking the door body 1002 driving the second hinge plate 21 to rotate outward (clockwise) when the door is opened as an example, the rotating component drives the second hinge plate 21 to rotate inward (counterclockwise), thereby compensating for the rotation speed of the second hinge plate 21 relative to the first hinge plate 10.

[0037] Under the action of the opening force, when the door is opened, the door body drives the second hinge plate to rotate at a second speed. The second speed is greater than the first speed, ensuring that the overall movement direction of the second hinge plate is the direction in which the door body drives the second hinge plate to move, which is the opposite direction of the preset direction, thus ensuring that the door body can be opened.

[0038] like Figure 14 As shown, the first end 301 of the connecting rod 30 is rotatably connected to the first hinge plate 10, and the second end 302 of the connecting rod 30 is rotatably connected to the transmission assembly 2.

[0039] When the door is opened, the second hinge plate 21 moves outward with the door body 1002, causing the second end 302 of the connecting rod 30 to move outward. This causes the connecting rod 30 to rotate relative to the first hinge plate 10 around its first end 301. With the combined effect of the connecting rod 30 moving outward with the door body 1002 and the rotating component causing the second hinge plate 21 to rotate in the opposite direction, the second hinge plate 21 moves outward while rotating. "Outward" refers to the direction away from the main body 1003.

[0040] In the closed position, there is a non-zero angle between the line connecting the first and second ends of the linkage 30 (the length direction of the linkage) and the perpendicular line from the body to the door.

[0041] Under the force of the opening, the second end of the connecting rod swings outward, and the connecting rod gradually extends outward, thus opening the door.

[0042] like Figure 3 As shown, in the closed position, the line connecting the first and second ends of the linkage (the length direction of the linkage) is perpendicular to the vertical line from the body to the door.

[0043] The outward movement of the second hinge plate 21 increases the distance between the second hinge plate 21 and the body 1003, thereby increasing the distance between the door 1002 and the body 1003, and preventing the door 1002 from interfering with or colliding with other components, including but not limited to the body 1003, the walls around the refrigerator 100, etc.

[0044] Optionally, the rotating component is in contact with the second hinge plate and can rotate relative to it, and the rotation axes of the rotating component and the second hinge plate do not coincide, wherein the rotating component is rotatably connected to the second end of the connecting rod through the rotation axis.

[0045] The rotating component is in contact with the second hinge plate and can rotate relative to it, which creates resistance to the movement of the second hinge plate, such as friction between the two. This reduces the movement speed of the second hinge plate and enhances the smoothness of opening the door.

[0046] Optionally, such as Figure 14 As shown, the rotating component is a driven gear 22, and the transmission assembly 2 also includes a driving component. Under the action of the door opening force, the second hinge plate drives the driving component to move, and the driving component drives the rotating component to rotate around the rotation axis.

[0047] The movement of the drive component is driven by the second hinge plate, so that the drive component does not require additional components such as a motor, and the rotating component can quickly respond to the movement of the second hinge plate.

[0048] The driving component is connected to the driven gear 22 and is used to drive the driven gear 22 to rotate.

[0049] The second hinge plate 21 is provided with gear teeth 216, and the driven gear 22 meshes with the gear teeth 216 to drive the second hinge plate 21 to rotate in a preset direction.

[0050] The meshing of the driven gear 22 and the gear teeth 216 enables the rotating component to drive the second hinge plate 21 to rotate in the opposite direction (preset direction). Since the meshing motion of the gears is smooth, the driven gear 22 can smoothly drive the second hinge plate 21 to rotate in the opposite direction, thus improving the smoothness of opening the door.

[0051] Optionally, the pitch circle radius of the driven gear is smaller than the pitch circle radius of the gear teeth, so that the first speed is less than the second speed.

[0052] In practical applications, the pitch circle of the driven gear and the pitch circle radius of the gear teeth can be flexibly set according to the required door opening speed, all of which are within the protection scope of this invention.

[0053] Optionally, the driving component is a drive gear 23, which is connected to the second hinge plate 21 via a rotating shaft 24. The drive gear 23 and the second hinge plate 21 can rotate relative to each other. The drive gear 23 can rotate around the rotating shaft 24, and the second hinge plate 21 can also rotate around the rotating shaft 24.

[0054] The driving gear 23, the driven gear 22 and the second end 302 of the connecting rod 30 are connected by a rotating shaft 25. The driving gear 23 can rotate around the rotating shaft 25, the driven gear 22 can also rotate around the rotating shaft 25, and the second end 302 of the connecting rod 30 can also rotate around the rotating shaft 25.

[0055] The distance between the rotation center of the drive gear 23 and the rotation shaft 24 is greater than the distance between the rotation center of the second hinge plate 21 and the rotation shaft 24, so that the second hinge plate 21 drives the drive gear 23 to rotate.

[0056] Specifically, the distance between the rotation axis 25 of the driving gear 23 and the rotation axis 24 is greater than the distance between the rotation center of the second hinge plate 21 and the rotation axis 24, which makes the lever arm of the driving gear 23 large. Thus, the driven gear 22 is driven by the driving gear 23, rather than by the second hinge plate 21.

[0057] Optionally, such as Figure 14 As shown, the radius of the driving gear 23 is larger than the radius of the driven gear 22.

[0058] The second hinge plate 21 drives the driving gear 23 to rotate via the rotating shaft 24, and the driving gear 23 drives the driven gear 22 to rotate via the rotating shaft 25. The connecting rod 30 limits the revolution of both the driving gear 23 and the driven gear 22 around the first end 301 of the connecting rod 30. The radius of the driving gear 23 is larger than the radius of the driven gear 22, so the rotational speed of the driving gear 23 around the rotating shaft 25 is less than the rotational speed of the driven gear 22 around the rotating shaft 25. The driven gear 22 meshes with the second hinge plate 21, driving the second hinge plate 21 to rotate in a preset direction to compensate for the speed of the second hinge plate 21's revolution around the rotating shaft 25, so that the door 1002 moves outward and rotates at the same time.

[0059] Optionally, the second hinge plate 21 is provided with a rotation hole 102, and the rotation shaft 24 is located in the rotation hole 102 to realize the rotational connection between the second hinge plate 21 and the rotation shaft 24.

[0060] The rotating shaft is connected to the rotating shaft, but their axes do not coincide.

[0061] The rotating component rotates around the rotation axis. Under the action of the opening force, the door body drives the second hinge plate to rotate around the rotation axis (rotate). The second end of the connecting rod is rotatably connected to the rotation axis. The rotation axis is connected to the rotation axis but the axes do not coincide, so that the second end of the connecting rod is offset from the rotation center of the second hinge plate (located on the axis of the rotation axis), thus realizing the motion trajectory of the door body moving outward and rotating at the same time in this application.

[0062] The door opening and closing device also includes a swing arm 26, and a rotating shaft 24 is located at one end of the swing arm 26 and is rotatably connected to one end of the swing arm 26, so as to realize the rotatable connection between the swing arm 26 and the rotating shaft 24.

[0063] like Figure 14 As shown, the driving gear 23 is located at the other end of the rocker arm 26 and is fixedly connected to the other end of the rocker arm 26, so that the driving gear 23 is rotatably connected to the rotating shaft 24 through the rocker arm 26.

[0064] The rocker arm 26 is positioned such that the distance between the rotation center of the drive gear 23 and the rotation shaft 24 is greater than the distance between the rotation center of the second hinge plate 21 and the rotation shaft 24.

[0065] In this design, the rotation center of the driving gear 23 is the perpendicular distance between the axis of the driving gear 23 and the rotating shaft 24. Figure 7 The distance between the axis of rotation and the axis of rotation; the second hinge plate 21 is sleeved on the outside of the axis of rotation 24 and rotates around the axis of rotation 24. Therefore, the rotation center of the second hinge plate 21 is located on the axis of rotation 24, and the distance between the rotation center of the second hinge plate 21 and the axis of rotation 24 is zero.

[0066] Optionally, the door opening and closing device also includes a guide section, which is arc-shaped with the center of the arc located on the axis of the rotating shaft. During the door opening process, the transmission component moves along the length of the guide section to guide the transmission component to revolve around the rotating shaft, so that the transmission component can drive the second end of the connecting rod to swing outward during the door opening process.

[0067] Optionally, the guide part includes a first guide part, which cooperates with the rotating part. During the door opening process, the rotating part rotates around the rotation axis along the surface of the first guide part to guide the rotating part to revolve around the rotation axis, thereby driving the second end of the connecting rod to rotate around the rotation axis, so that the second end of the connecting rod swings outward when the door is opened under the action of the door opening force.

[0068] Optionally, the first guide portion is provided on the first hinge plate 10. The first guide portion cooperates with the driven gear 22 and can also guide the driven gear 22 to move with the second hinge plate 21 during the door opening process.

[0069] During the opening process, the second hinge plate 21 moves with the door body 1002. The driven gear 22 cooperates with the first guide part, which guides the driven gear 22 to move with the second hinge plate 21, so that the driven gear 22 can always mesh with the gear teeth 216 on the second hinge plate 21, thereby driving the second hinge plate 21 to rotate in a preset direction.

[0070] Optionally, the first guide portion is a first arc-shaped rack 106 provided on the first hinge plate 10, extending in the direction from the body 1003 to the door body 1002. The first arc-shaped rack 106 meshes with the driven gear 22 so that the driven gear 22 moves along the first arc-shaped rack 106.

[0071] like Figures 1 to 5 As shown, in the closed position, the driven gear 22 is located at the end of the first arc-shaped rack 106 near the body 1003. During the opening process, the driven gear 22 meshes with the first arc-shaped rack 106 and moves along the length of the first arc-shaped rack 106, so that the driven gear 22 can always mesh with the second hinge plate 21. In the half-open position, as shown... Figures 6 to 9 As shown, the driven gear 22 moves to the middle of the first arc-shaped rack 106. In the fully open position, as... Figures 10 to 13 As shown, the driven gear 22 moves to the end of the first arc-shaped rack 106 near the door body 1002.

[0072] The center of the circle containing the first arc-shaped rack 106 is located on the axis of the rotating shaft 40, so that the driven gear 22 revolves around the rotating shaft 40.

[0073] Optionally, the guide portion further includes a second guide portion, which cooperates with the drive component. During the door opening process, the drive component rotates around the rotation axis along the surface of the second guide portion to guide the drive component to revolve around the rotation axis, so that both the drive component and the rotating component can revolve around the rotation axis and can always be connected through the rotation axis.

[0074] Optionally, the second guide portion is provided with a second arc-shaped rack 107 extending along the direction from the body 1003 to the door body 1002. The second arc-shaped rack 107 meshes with the drive gear 23 so that the drive gear 23 moves along the second arc-shaped rack 107.

[0075] In the closed position, the drive gear 23 is located at the end of the second arc-shaped rack 107 near the main body 1003. During the opening process, the drive gear 23 meshes with the second arc-shaped rack 107 and moves along the length of the second arc-shaped rack 107, so that the drive gear 23 and the driven gear 22 can always be connected through the rotating shaft 25. In the open position, the drive gear 23 moves to the end of the second arc-shaped rack 107 near the door body 1002.

[0076] The center of the circle containing the second arc-shaped rack 107 is located on the axis of the rotating shaft 40. The first arc-shaped rack 106 and the second arc-shaped rack 107 are concentrically arranged, causing the driving gear 23 to revolve around the rotating shaft 40. Since the radius of the driven gear 22 is smaller than the radius of the driving gear 23, the speed at which the driven gear 22 rotates around the rotating shaft 25 is greater than the speed at which the driving gear 23 rotates around the rotating shaft 25.

[0077] The first hinge plate 10 includes a first fixing part 103, a pivot mounting part 104, and a rack setting part 105 connected to each other. The first fixing part 103 is fixedly connected to the body 1003, such as... Figure 14 As shown, the first screw hole 101 is provided in the first fixing part 103, thereby realizing the fixed connection between the first hinge plate 10 and the body 1003. The rotating shaft mounting part 104 is connected to the first fixing part 103, and the rotating shaft 40 is provided in the rotating shaft mounting part 104. Specifically, the rotating shaft 40 mating part is provided with a rotating hole 102, and the rotating shaft 40 is located in the rotating hole 102 and rotatably connected to the rotating hole 102. Optionally, the rotating shaft mounting part 104 is located on the side of the first fixing part 103 away from the body 1003, so that the transmission assembly 2 has a larger installation space. The rack setting part 105 is located on one side of the rotating shaft mounting part 104, and the first arc-shaped rack 106 and the second arc-shaped rack 107 are provided in the rack setting part 105. The first arc-shaped rack 106 and the second arc-shaped rack 107 are arranged sequentially in the vertical direction, as shown in the figure, the first arc-shaped rack 106 is located above the second arc-shaped rack 107.

[0078] The second hinge plate 21 includes a second fixed part 212 and a rotating part 213 connected to each other. The second fixed part 212 is fixedly connected to the door body 1002, such as... Figure 14 As shown, the second screw hole 211 is provided in the second fixing part 212, thereby realizing the fixed connection between the second hinge plate 21 and the door body 1002. The rotating part 213 is located on the side of the second fixing part 212 away from the door body 1002 and is provided near the pivot mounting part 104. The rotating part 213 is provided with a through hole 214, and the rotating shaft 24 passes through the through hole 214 and rotates relative to the through hole 214, realizing the rotational connection between the rotating part 213 and the rotating shaft 24, and the second hinge plate rotates around the rotating shaft.

[0079] The first end 301 of the connecting rod 30 has a first connecting rod hole 303, and the second end 302 has a second connecting rod hole 304. The rotating shaft 25 passes through the driving gear 23, the driven gear 22, and the second connecting rod hole 304 in sequence, enabling the connecting rod 30, the driven gear 22, and the driving gear 23 to rotate freely relative to each other. The rotating shaft 40 passes through the first connecting rod hole 303, enabling the connecting rod 30 to rotate freely with the first hinge plate 10.

[0080] The opening process of this application will be described in detail below with reference to the accompanying drawings: When the door 1002 is pulled, the door 1002 drives the second hinge plate 21 to rotate clockwise. The second hinge plate 21 drives the drive gear 23 to roll clockwise along the second arc-shaped rack 107 through the rotating shaft 24, and the second hinge plate 21 swings outward. Since the drive gear 23 and the driven gear 22 are connected through the rotating shaft 25, the driven gear 22 rolls clockwise along the first arc-shaped rack 106 at the same time. The connecting rod 30 limits the drive gear 23 and the driven gear 22 mounted on the rotating shaft 25 to revolve around the rotating shaft 40. The diameter of the driven gear 22 is smaller than the diameter of the drive gear 23, so the driven gear 22 rotates faster around the rotating shaft 25 than the drive gear 23, thereby driving the second hinge plate 21 to rotate counterclockwise to compensate for the speed of the second hinge plate 21 revolving around the rotating shaft 25, so that the door 1002 can move outward and rotate at the same time.

[0081] When the door is closed, the door body drives the second hinge plate to rotate counterclockwise, driving the drive gear 23 to roll counterclockwise along the second arc-shaped rack 107, and the second hinge plate 21 swings inward. Since the drive gear 23 and the driven gear 22 are connected through the rotating shaft 25, the driven gear 22 rolls counterclockwise along the first arc-shaped rack 106 at the same time. The connecting rod 30 limits the drive gear 23 and the driven gear 22 mounted on the rotating shaft 25 to revolve around the rotating shaft 40. The diameter of the driven gear 22 is smaller than the diameter of the drive gear 23, so the driven gear 22 rotates faster than the drive gear 23 around the rotating shaft 25, thereby driving the second hinge plate 21 to rotate clockwise to compensate for the speed of the second hinge plate 21 revolving around the rotating shaft 25, so that the door body 1002 can move inward and rotate at the same time.

[0082] An embodiment of the second aspect of this application provides a refrigerator 100, including a body 1003, a door 1002, and an opening and closing device for the refrigerator 100 as described in any of the above embodiments.

[0083] The door 1002 is rotatably connected to the body 1003 to open or close the body 1003; the first hinge plate 10 is connected to the body 1003, and the second hinge plate 21 is connected to the door 1002.

[0084] The refrigerator 100 provided in the second aspect of this application has all the beneficial effects of the door opening and closing device as described in any of the above embodiments because it includes the door opening and closing device as described in any of the above embodiments, and will not be repeated here.

[0085] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A door opening and closing device for a refrigerator, characterized in that, The refrigerator includes a door and a body, the door being rotatably connected to the body to open or close the body; the door opening and closing device includes: A first hinge plate is adapted to be connected to the body; The transmission assembly includes a second hinge plate and a rotating component. The second hinge plate is adapted to be connected to the door body. The rotating component cooperates with the second hinge plate to drive the second hinge plate to rotate in a preset direction at a first speed. The preset direction is opposite to the direction in which the door body drives the second hinge plate to rotate when the door is opened. Under the action of the opening force, the door body drives the second hinge plate to rotate at a second speed, which is greater than the first speed. A connecting rod, the first end of which is rotatably connected to the first hinge plate via a rotating shaft, and the second end of which is rotatably connected to the transmission assembly via a rotating shaft; The guide section is arc-shaped, with the center of the arc located on the axis of the rotating shaft. During the door opening process, the transmission component moves along the length direction of the guide section.

2. The door opening and closing device for a refrigerator according to claim 1, characterized in that, The rotating component is a driven gear, and the transmission assembly further includes: A driving component is connected to the driven gear and is used to drive the driven gear to rotate; The second hinge plate is provided with gear teeth, and the driven gear meshes with the gear teeth to drive the second hinge plate to rotate in the preset direction.

3. The door opening and closing device for a refrigerator according to claim 2, characterized in that, The driving component is a drive gear, which is connected to the second hinge plate via a rotating shaft. The drive gear and the second hinge plate can rotate relative to each other. The second hinge plate drives the drive gear to rotate, and the drive gear drives the driven gear to rotate. The driving gear, the driven gear, and the second end of the connecting rod are connected by the rotating shaft, and the radius of the driving gear is larger than the radius of the driven gear.

4. The door opening and closing device for a refrigerator according to claim 3, characterized in that, The distance between the rotation center of the driving gear and the rotation axis is greater than the distance between the rotation center of the second hinge plate and the rotation axis, so that the second hinge plate drives the driving gear to rotate, and the driving gear drives the driven gear to rotate.

5. The door opening and closing device for a refrigerator according to claim 4, characterized in that, Also includes: A swing arm, wherein the rotating shaft is located at one end of the swing arm and rotatably connected to that end of the swing arm, and the rotating shaft is located at the other end of the swing arm, such that the distance between the rotation center of the drive gear and the rotating shaft is greater than the distance between the rotation center of the second hinge plate and the rotating shaft.

6. The door opening and closing device for a refrigerator according to any one of claims 1 to 5, characterized in that, The guide section includes: The first guide portion cooperates with the rotating component. During the door opening process, the rotating component rotates along the surface of the first guide portion around the rotation axis to guide the rotating component to revolve around the rotation axis.

7. The door opening and closing device for a refrigerator according to claim 6, characterized in that, The rotating component is a driven gear; The first guide portion is a first arc-shaped rack provided on the first hinge plate, extending in the direction from the body to the door body. The center of the circle containing the first arc-shaped rack is located on the axis of the rotating shaft. The first arc-shaped rack meshes with the driven gear so that the driven gear moves along the first arc-shaped rack.

8. The door opening and closing device for a refrigerator according to any one of claims 2 to 5, characterized in that, The guide section also includes: The second guide portion cooperates with the drive component. During the door opening process, the drive component rotates along the surface of the second guide portion around the rotation axis to guide the drive component to revolve around the rotation axis.

9. The door opening and closing device for a refrigerator according to claim 8, characterized in that, The driving component is a drive gear; The second guide portion is a second arc-shaped rack that extends along the direction from the body to the door body provided by the first hinge plate. The center of the circle containing the second arc-shaped rack is located on the axis of the rotating shaft. The second arc-shaped rack meshes with the driving gear so that the driving gear moves along the second arc-shaped rack.

10. A refrigerator, characterized in that, include: ontology; The door is rotatably connected to the main body to open or close the main body; The door opening and closing device for a refrigerator as described in any one of claims 1 to 9, wherein a first hinge plate is connected to the body and a second hinge plate is connected to the door.

Images