CN217681150U

CN217681150U - Household electrical appliance

Info

Publication number: CN217681150U
Application number: CN202221380559.8U
Authority: CN
Inventors: 位帅帅; 吴延岐; 朱新朝
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-10-28
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a household appliance. The household appliance comprises: a support; the door body is provided with a door hook; the buffer assembly is arranged on the support and comprises a single driving elastic part, a damper and a driving lever, the damper is movably connected with the driving lever, the driving lever is provided with a connecting part, the single driving elastic part is connected with the connecting part, the door hook is separated from the driving lever under the condition that the door body is opened, the included angle between the single driving elastic part and a target connecting line is selected from the range of 0-60 degrees, and the target connecting line is a connecting line between the connecting part formed by the single driving elastic part and the connecting part and the rotating center of the driving lever; under the condition that the door body is closed, the door hook pushes against the driving lever to extrude the damper. In the household appliance, when the door body is opened, the angle range between the single driving elastic piece and the target connecting line is set, so that the single driving elastic piece 60 can provide proper driving force during the closing process of the door body, and the door body can be smoothly closed.

Description

Household electrical appliance

Technical Field

The utility model relates to the technical field of electrical apparatus, in particular to household appliance.

Background

In the related art, a household appliance may include a cavity in which a chamber is disposed and a door body rotatably connected to the cavity to open or close the chamber. In order to reduce the noise of closing the door, the household appliance is provided with a slow-closing door interlocking structure, the slow-closing door interlocking structure comprises a driving spring, and the driving spring provides an accelerating force for the door body to close the door through a driving lever. Therefore, it is necessary to provide a solution for designing the driving force of the driving spring.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides a household appliance.

The utility model discloses embodiment's a domestic appliance, include:

a support;

the door body is rotationally connected with the bracket and provided with a door hook;

the buffer assembly is arranged on the bracket and comprises a single driving elastic part, a damper and a driving lever, the damper is movably connected with the driving lever, the driving lever is provided with a connecting part, the single driving elastic part is connected with the connecting part,

under the condition that the door body is opened, the door hook is separated from the driving lever, the included angle between the single driving elastic piece and a target connecting line is selected from the range of 0-60 degrees, and the target connecting line is a connecting line between the connecting part formed by the single driving elastic piece and the connecting part and the rotation center of the driving lever;

under the condition that the door body is closed, the door hook props against the driving lever to extrude the damper.

In the household appliance, when the door body is opened, the angle range between the single driving elastic piece and the target connecting line is set, so that the single driving elastic piece 60 can provide proper driving force during the closing process of the door body, and the door body can be smoothly closed.

In some embodiments, the acting force of the single driving elastic piece is positioned above the rotation center of the driving lever when the door body is opened;

under the condition that the door body is closed, the acting force of the single driving elastic piece is positioned below the rotation center of the driving lever.

In some embodiments, during the closing process of the door body, the tangential component of the force of the single driving elastic member is switched from providing a torque for the driving lever to rotate in a first direction to providing a torque for the driving lever to rotate in a second direction, where the first direction is opposite to the second direction, and the torque for the driving lever to rotate in the second direction is used for accelerating the closing process of the door body.

In some embodiments, the bracket is provided with a through hole, the single driving elastic element and the driving lever are respectively arranged on two opposite sides of the bracket, and the connecting portion penetrates through the through hole.

In some embodiments, the buffer assembly further includes a swing block, the swing block is rotatably connected to the driving lever and the damper, when the door hook applies an acting force to the driving lever, the driving lever rotates by a preset angle to drive the swing block to compress the damper, and when the damper is compressed, the damper provides damping to the door hook and rotates.

In some embodiments, the buffer assembly further comprises a rotating lever, the bracket is provided with a switch, the rotating lever is rotatably connected with the bracket,

under the condition that the door body is closed, the door hook abuts against the rotating lever so that the rotating lever triggers the switch.

In some embodiments, the rotating lever includes a rotating arm and a contact arm, the rotating arm is rotatably connected to the bracket, the contact arm is connected to the rotating arm, the bracket has a slot, the contact arm is at least partially located in the slot, and the contact arm is used for triggering the switch.

In some embodiments, the driving lever comprises a first arm and a second arm which are spaced apart from each other, the door hook abuts against the first arm after passing under the second arm to drive the driving lever to rotate during the closing process of the door body,

the contact arm is provided with a convex column,

the first arm is provided with a notch, and the convex column is avoided by the first arm through the notch in the closing process of the door body.

In some embodiments, the bracket is further provided with a stop that blocks at least a portion of the pivot arm.

In some embodiments, the hook end has a first guide surface;

the driving lever comprises a first arm and a second arm which are spaced, a second guide surface is arranged on the side face of the second arm, and the first guide surface is matched and connected with the second guide surface in the process that the door body is closed, so that the tail end of the door hook bypasses behind the second arm, and the second arm clamps the door hook.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 to 4 are schematic structural views of a household appliance according to an embodiment of the present invention;

fig. 5 to 6 are schematic views of the bracket and the rotating lever assembly according to the embodiment of the present invention;

fig. 7 is an exploded schematic view of a household appliance according to an embodiment of the present invention;

fig. 8 to 10 are schematic structural views of parts of a household appliance according to an embodiment of the present invention;

fig. 11 is a partially exploded schematic view of a household appliance according to an embodiment of the present invention;

fig. 12 to 13 are schematic views illustrating the assembly of the door hook and the door body according to the embodiment of the present invention;

fig. 14 to 16 are schematic structural views of a pendulum mass according to an embodiment of the present invention;

fig. 17 to 21 are schematic structural views ofbase:Sub>A protective cover according to an embodiment of the present invention, wherein fig. 18 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 17;

fig. 22 to 27 are schematic structural views of a door hook according to an embodiment of the present invention, wherein fig. 23 is a cross-sectional view taken along line B-B of fig. 22;

fig. 28 to 33 are schematic structural views of a bracket according to an embodiment of the present invention, in which fig. 29 is a sectional view taken along line C-C of fig. 28;

fig. 34 to 39 are schematic structural views of a driving lever according to an embodiment of the present invention, in which fig. 35 is a sectional view taken along line D-D of fig. 34;

fig. 40 to 41 are schematic structural views of the swash block according to the embodiment of the present invention;

fig. 42 to 45 are schematic structural views of a turning lever according to an embodiment of the present invention;

fig. 46 to 48 are schematic diagrams illustrating a first door closing process of the household appliance according to the embodiment of the present invention;

fig. 49 is a schematic view of a force state of the driving elastic member during a door closing process of the household appliance according to the embodiment of the present invention;

fig. 50 to 52 are schematic diagrams illustrating a second door closing process of the household appliance according to the embodiment of the present invention;

fig. 53 is a schematic view illustrating a force state of the driving elastic member in a second door closing process of the household appliance according to the embodiment of the present invention;

fig. 54 to 56 are schematic views illustrating a third door closing process of the household appliance according to the embodiment of the present invention;

fig. 57 is a schematic view of a force state of the driving elastic member in the third door closing process of the household appliance according to the embodiment of the present invention;

FIG. 58 is a length change of a single drive spring during door closing of an embodiment of the present invention;

fig. 59 to 61 are schematic views illustrating a door closing state of the household appliance according to the embodiment of the present invention;

fig. 62 to 64 are schematic views illustrating a door opening process of the electric home appliance according to the embodiment of the present invention;

fig. 65 is a schematic view of the state of the driving lever after abnormal triggering according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The disclosure herein provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described herein. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 to 11 and fig. 49, a household appliance 100 according to an embodiment of the present invention includes a door 12, a bracket 14 and a buffer assembly 16. The door body 12 has a door hook. The door 12 is rotatably connected to the bracket 14. The buffer assembly 16 is mounted on the bracket 14, the buffer assembly 16 includes a single driving elastic member 60, a damper 18 and a driving lever 20, the damper 18 is movably connected with the driving lever 20, a connecting portion 70 is arranged on the driving lever 20, and the single driving elastic member 60 is connected with the connecting portion 70.

When the door body 12 is opened, the door hook is separated from the driving lever 20, the included angle T between the single driving elastic member 60 and the target connecting line L is selected from the range of 0 degree to 60 degrees, and the target connecting line L is a connecting line between the connecting position formed by the single driving elastic member 60 and the connecting portion 70 and the rotation center of the driving lever 20.

In the case where the door body 12 is closed, the door hook abuts against the driving lever 20 to press the damper 18.

In the household appliance 100, when the door 12 is opened, the single driving elastic member 60 can provide a proper driving force during the closing process of the door 12 by setting the angle range between the single driving elastic member 60 and the target connecting line, so that the door 12 can be smoothly closed.

Specifically, the household appliance 100 includes, but is not limited to, a microwave oven, an oven (including an electric oven, a microwave oven, and a micro-steaming and baking all-in-one machine), a steam box, a dishwasher, a sterilizer, and the like, and the household appliance 100 has a door 12. The embodiment of the present invention is illustrated by taking the household appliance 100 as a microwave oven, and the embodiment of the present invention is illustrated by taking the household appliance 100 as a microwave oven for convenience of understanding, which should not be construed as a limitation to the present invention.

The door body 12 can be a double-layer glass door body 12; the door 12 may be made of a glass for preventing the leakage of waves. One of the benefits of using a glass door 12 is that it facilitates a user to view the food within the appliance 100 from the outside. In addition, the outer surface of the door body 12 may be provided with a handle, which is convenient for a user to perform door opening and closing operations.

The material of the door hook can be all selected from metal materials or plastic materials, or the combination of different materials. The door hook is strip-shaped, the tail end of the door hook is provided with a hook-shaped part 86, and the hook-shaped part 86 can be conveniently clamped. The number of the hooks can be set according to actual conditions, for example, the number of the hooks can be single, two or more than two. In an embodiment of the present invention, the door hook comprises two door hooks, i.e. an upper door hook 26 and a lower door hook 28, as shown in fig. 12 and 13. In one embodiment, the upper hook 26 and the lower hook 28 may be connected to form an integral structure and fixed to the door 12. In other embodiments, the upper hook 26 and the lower hook 28 may be separately fixed to the door 12, or the hooks may be movably connected to the door 12. And is not particularly limited herein.

During the closing process of the door 12, mainly the lower hook 28 is subjected to the damping force of the damping assembly 16 to reduce the noise of closing the door. That is, in a case where the door body 12 is closed, the lower hook 28 interferes with the driving lever 20 to press the damper 18. When the door 12 is opened, the lower hook 28 is disengaged from the driving lever 20, and the damper 18 has the longest length. It is understood that in other embodiments, the upper hook 26 may be subjected to the buffering force of the buffering assembly 16 to reduce the door closing noise, or both the upper hook 26 and the lower hook 28 may be subjected to the buffering force of the buffering assembly 16 to reduce the door closing noise, which is not limited herein. In the following embodiments, the door hook 28 is described by taking as an example the damping force received by the damper unit 16.

Referring to fig. 10 to 11 and 40 to 41, the household appliance 100 further includes an inclined block 30 and a compression spring 32, the inclined block 30 and the compression spring 32 are mounted on the bracket 14, an accommodating space is provided in the inclined block 30, the compression spring 32 is partially accommodated in the accommodating space, a top of the compression spring 32 abuts against a top wall of the accommodating space, and a bottom of the compression spring 32 abuts against a support member extending into the accommodating space on the bracket 14. The top of the ramp block 30 has a ramp 74, the ramp 74 sloping upwardly in a vertical plane towards the interior of the rack 14.

When the door body 12 is closed, the end of the upper hook 26 abuts against the inclined surface 74 to lower the inclined block 30 and compress the pressure spring 32, and when the end of the upper hook 26 goes over the inclined surface 74, the inclined block 30 catches the upper hook 26 by the pressure spring 32.

During the opening process of the door body 12, the upper door hook 26 presses the inclined block 30 to move downwards, and the upper door hook 26 moves outwards until the upper door hook is completely separated. The compression spring 32 resets the ramp block 30.

The opening of the door 12 according to the embodiment of the present invention may mean that when the door 12 is opened, the lower door hook 28 does not apply an acting force to the driving lever 20 to rotate the driving lever 20, or the applied acting force is not enough to rotate the driving lever 20, as shown in fig. 1 to 4. The door 12 is closed, which may refer to a state in which the lower hook 28 is at the final position of the door closing stroke, as shown in fig. 59 to 61.

The household appliance 100 may include a cavity (not shown), the bracket 14 may be fixed in the cavity, and the door 12 is rotatably connected with the cavity. The cavity is provided with a cavity, the front side of the cavity is provided with an opening, and the door body 12 is used for closing and opening the opening. The cavity can be used for placing food to be heated.

The damper 18 includes a body 22 and a lever 24, the body 22 is rotatably mounted on the bracket 14, the lever 24 is movably connected to the body 22, and the body 22 can rotate the lever 24 to accommodate the rotation of the actuating lever 20 during the opening and closing of the door 12. It will be appreciated that in other embodiments, the body 22 may be fixed against rotation.

In one embodiment, the damping assembly 16 further includes a swing block 34, the swing block 34 is rotatably connected to the driving lever 20 and the damper 18, and when the lower hook 28 applies a force to the driving lever 20, the driving lever 20 rotates a predetermined angle to drive the swing block 34 to compress the damper 18, and when the damper 18 is compressed, the damper 28 is damped and rotates. Therefore, under the condition that the lower door hook 28 applies acting force to the driving lever 20, the driving lever 20 can rotate by a preset angle and then drive the swing block 34 to compress the damper 18, and further, when the lower door hook 28 acts on the driving lever 20 at the initial stage, the lower door hook 28 is not rebounded by the damper 18 to cause unsmooth door closing or even stagnation, and the user experience is improved.

Specifically, referring to fig. 34 to 39, the driving lever 20 is provided with an accommodating groove 35, a rotating space 37 is provided at the top of the accommodating groove 35, a swinging space 39 is provided at the bottom of the accommodating groove 35, one end of the swinging block 34 is rotatably accommodated in the rotating space 37, the other end of the swinging block 34 is accommodated in the swinging space 39, and the swinging space 39 is used for providing a space for the driving lever 20 to rotate by a preset angle. In this way, the driving lever 20 can rotate through a preset angle to drive the swing block 34 to rotate.

The actuating lever 20 includes a first arm 52 and a second arm 54 spaced apart from each other, the first arm 52 and the second arm 54 forming a space therebetween, the second arm 54 being closer to the door body 12 (door hook) than the first arm 52, and the second arm 54 being shorter than the first arm 52 with respect to the rotational axis of the actuating lever 20.

The first arm 52 defines an accommodating groove 35, and specifically, in the embodiment shown in fig. 34, the right side of the first arm 52 defines the accommodating groove 35, and the swing block 34 is located in the accommodating groove 35.

Referring to fig. 14 to 16, the top end of the swing block 34 has a connection rotation portion 41, and the connection rotation portion 41 is rotatably received in the rotation space 37. In one example, the rotation space 37 is substantially cylindrical, and the connection rotation portion 41 is cylindrical to match the rotation space 37.

The swing space 39 is provided so that the swing block 34 is not acted upon when the driving lever 20 starts to rotate, and the damper 18 is not compressed, so that the lower door hook 28 is not rebounded or even stopped due to the resistance of the damper 18 at the initial stage of abutting against the driving lever 20. The size of the swing space 39 can determine the size of the preset angle, and can be calibrated according to actual conditions.

Further, the right side of the swing space 39 is provided with a protrusion 43, and the protrusion 43 is used for limiting the swing block 34 in the accommodating groove 35, so as to prevent the swing block 34 from being separated from the accommodating groove 35.

Referring to fig. 14, the top end of the pendulum block 34 is further provided with a slot 45, the rod 24 of the damper 18 penetrates through the slot 45 to be rotatably connected with the pendulum block 34, and the slot 45 is arranged to avoid the rod 24 in the rotation process of the damper 18.

Referring to fig. 4, in the closing process of the door 12, the lower door hook 28 pushes the driving lever 20 to rotate counterclockwise, and after the driving lever 20 rotates by a predetermined angle (the gap between the driving lever 20 and the swing block 34 is eliminated), the swing block 34 applies an acting force to the rod 24 to push the rod 24 to move toward the inside of the body 22, so that the body 22 provides a damping force to the rod 24 to reduce the closing speed of the door 12, thereby reducing the door closing noise. Referring to fig. 64, in the opening process of the door 12, the lower door hook 28 drives the driving lever 20 to rotate clockwise, the driving lever 20 can drive the rod 24 to move through the swing block 34, meanwhile, the rod 24 is driven by the body 22 to extend out of the body 22, until the driving lever 20 stops rotating, and the damper 18 returns to the initial state.

In some embodiments, referring to fig. 30, the bracket 14 is provided with a limiting post 38, and when the door 12 is closed, the limiting post 38 abuts against the driving lever 20 and limits the rotation of the driving lever 20. Thus, the rotation range of the driving lever 20 can be restricted, and the driving lever 20 can be prevented from being damaged.

Specifically, the position of the position limiting column 38 is set such that the rotation of the driving lever 20 does not exceed the position of the position limiting column 38. This position is the position to which the actuating lever 20 is pivoted after the door is closed.

The utility model discloses embodiment's domestic appliance 100 includes single drive elastic component 60, and single drive elastic component 60 sets up the both sides that carry on the back mutually at support 14 respectively with drive lever 20, and drive lever 20 lies in same one side of support 14 with attenuator 18. The bracket 14 is provided with a through hole 66, as shown in fig. 32 to 33, the connecting portion 70 penetrates through the through hole 66, so that the connecting portion 70 can be connected with the single driving elastic member 60, and the single driving elastic member 60 can be used for driving the driving lever 20 to rotate in an accelerating manner, so that the driving lever 20 drives the door body 12 to accelerate. In this way, the process of first accelerating and then decelerating the lower door hook 28 (the door body 12) can be realized.

In the case that the door body 12 is opened, the included angle T between the single driving elastic member 60 and the target connecting line L is selected from a range of 0 degree to 60 degrees, and in one example, the included angle T may be 0 degree, 20 degrees, 30 degrees, 40 degrees, 50 degrees or 60 degrees, or other degrees between 0 degree and 60 degrees.

Since the position and angle of the driving elastic member before the door is closed determines the position and angle of the single driving elastic member 60 after the door is closed. The angle and position of the single driving elastic member 60 can be adaptively changed following the rotation of the driving lever 20, and the final position and angle of the single driving elastic member 60 after closing the door can be determined by determining the rotation angle of the driving lever 20. Therefore, by setting the size of the included angle between the single driving elastic member 60 and the target connecting line when the door body 12 is opened, the position and the angle of the single driving elastic member 60 before the door is closed can be determined.

In the illustrated embodiment, the specific structure of the driving elastic member is a spring. In other embodiments, the driving elastic member may be an elastic member having other structures, and is not limited to a spring.

The single driving elastic member 60 and the driving lever 20 located at the two opposite sides of the bracket 14 can distribute the related structural members, so as to avoid the disadvantage of configuration of the structural members due to space reduction and excessive weight concentration caused by too many structural members at the same side of the bracket 14.

Since the driving lever 20 can drive the lower hook 28 to accelerate, the door 12 can be closed by the force of the driving lever 20 during the acceleration phase. During acceleration of the lower hook 28, the damper 18 is then compressed when the actuating lever 20 is rotated. As the door closing process continues, the driving lever 20 continuously compresses the rod 24 of the damper 18, the compression amount of the damper 18 increases, the damping force provided increases, and when the damping force provided by the damper 18 is greater than the driving force provided by the single driving elastic member 60, the lower hook 28 starts to decelerate, so that the noise generated when the door body 12 is closed is not too great in the deceleration stage.

Referring to fig. 3 and 32, one end of the single driving elastic member 60 hooks the positioning post 68 on the bracket 14, and the other end hooks the connecting portion 70 on the driving lever 20.

In some embodiments, referring to fig. 49, when the door 12 is opened, the acting force F of the single driving elastic member 60 is above the rotation center O of the driving lever 20;

referring to fig. 57, the force F of the single driving elastic member 60 is located below the rotation center O of the driving lever 20 when the door body 12 is closed. Therefore, the driving lever 20 can rotate in different directions before and during closing the door, and the tight closing of the door can be realized.

Specifically, referring to fig. 49, the force F of the single driving elastic member 60 on the driving lever 20 is located above the rotation center O of the driving lever 20, and the driving lever 20 can rotate in the first direction under the force of the single driving elastic member 60. Referring to fig. 57, the force F of the single driving elastic member 60 on the driving lever 20 is located below the rotation center O of the driving lever 20, and the driving lever 20 can rotate in the second direction under the force F of the single driving elastic member 60. The first direction is opposite to the second direction. In fig. 49, the first direction is counterclockwise, and in fig. 57, the second direction is clockwise.

When the door is opened, the actuating lever 20 is at rest when the lower door hook 28 has not yet abutted against the actuating lever 20, and the force F of the single actuating elastic member 60 acts on the actuating lever 20 so that the actuating lever 20 can be rotated clockwise. At lower door hook 28 butt drive lever 20, drive lever 20 takes place anticlockwise rotation under lower door hook 28's effect for single drive elastic component 60 switches over the below of drive lever 20 rotation center O to drive lever 20's effort F, and drive lever 20 changes from clockwise rotation into anticlockwise rotation, and at this moment, drive lever 20 does not receive spacingly, under the effort F effect of single drive elastic component 60, continues along anticlockwise rotation and then drives lower door hook 28 and accelerate.

The process that actuating lever 20 has the direction of rotation conversion can make actuating lever 20 pivoted angle great, and actuating lever 20 turned angle is great can drive lower door and collude 28 and more can go deep into the cavity, and then more inseparable when making door 12 close.

In some embodiments, during the closing process of the door 12, the tangential component F1 of the single driving elastic member 60 is switched from providing the torque for rotating the driving lever 20 in a first direction to providing the torque for rotating the driving lever 20 in a second direction, wherein the first direction is opposite to the second direction, and the torque for rotating the driving lever 20 in the second direction is used for accelerating the closing process of the door 12. The accelerated closing of the door body can be realized.

Specifically, referring to fig. 49, in fig. 49, the first direction is counterclockwise, and the second direction is clockwise. The force F of the single driving elastic member 60 is located above the rotation center O of the driving lever 20 so that the rotating lever 20 can be rotated counterclockwise. As can be seen from fig. 49, the tangential component F1 of the single driving elastic member 60 provides the counterclockwise rotation torque to the driving lever 20, and thus, the driving lever 20 can be rotated counterclockwise.

In the closing process of the door body 12, the lower door hook 28 drives the driving lever 20 to rotate, so that the acting force F of the single driving elastic piece 60 is located below the rotation center O of the driving lever 20, and the tangential component force F1 of the single driving elastic piece 60 is switched to provide a clockwise rotation torque for the driving lever 20, so that the single driving elastic piece 60 can accelerate the rotation of the driving lever 20, and further drive the lower door hook 28 and the door body 12 to accelerate the closing.

In this embodiment, the door closing process can be divided into three processes: a first door closing process, a second door closing process and a third door closing process.

Referring to fig. 46 to fig. 49, at the beginning of the door closing process, the lower hook 28 touches the driving lever 20 at the instant, and as can be seen from fig. 49, the acting force F of the single driving elastic member 60 is located above the rotation center O of the driving lever 20, so as to force the driving lever 20 to rotate counterclockwise. As can be seen from fig. 49, the tangential force component F1 of the single driving elastic member 60 provides the counterclockwise rotation torque to the driving lever 20, and thus, the driving lever 20 can be rotated counterclockwise, but is restrained, and thus, the driving lever 20 is at rest.

And a second door closing process: the lower hook 28 is moved by the actuating lever 20 into the bracket 12 (it can be understood that "the lower hook 28 is sucked in by the actuating lever 20").

Referring to fig. 50 to 53, the acting force F of the single driving elastic member 60 is located below the rotation center O of the driving lever 20, and the single driving elastic member 60 is located below the rotation center O of the driving lever 20, at this time, the single driving elastic member 60 allows the driving lever 20 to rotate clockwise. The tangential component of force provided by the single actuating spring 60 is relatively small and thus provides less torque to the actuating lever 20. And the length of the single driving elastic element 60 is firstly lengthened and then shortened in the process from the first door closing process to the second door closing process, and the elastic force is firstly large and then small.

A door closing process III: the lower hook 28 starts to push the turning lever 20 to turn.

Referring to fig. 54 to 57, from the second door closing process to the third door closing process, the torque provided to the driving lever 20 by the force F of the single driving elastic member 60 is increased. I.e. the torque provided by the tangential force component F1 of the single driving spring 60 is constantly increasing. Until the door 12 is in the closed position.

Referring to fig. 58, it can be seen that the length variation of the single driving elastic member 60 is small, and during the whole movement, the length can be approximately regarded as the same, only the direction of the force is changed, and the changed direction angle is small. In fig. 58, the radius of the middle circle is the length of the single driving elastic member 60 when the door body 12 is opened, the radius of the outermost circle is the length of the single driving elastic member 60 when the door body 12 is closed, and the radius of the innermost circle is the length of the single driving elastic member 60 when the door body 12 is closed.

In some embodiments, referring to fig. 4, the damping assembly 16 further includes a rotating lever 40, the bracket 14 is provided with a switch, the rotating lever 40 is rotatably connected to the bracket 14,

when the door body 12 is closed, the door hook abuts against the turning lever 40 so that the turning lever 40 triggers the switch. So, increase and rotate lever 40, on the one hand, can satisfy the ann rule requirement, on the other hand, can further reduce the noise of closing the door.

In particular, some household appliances 100 require the door 12 to be closed to allow the household appliance 100 to operate. For example, the microwave oven is required to emit microwave into the cavity to heat food after the door 12 is closed, so as to prevent the leakage of microwave when the door is not closed.

Under the condition that the door body 12 is closed, the lower door hook 28 props against the rotating lever 40 to enable the rotating lever 40 to trigger the switch, so that the control panel of the household appliance 100 obtains a related trigger signal, and then the household appliance 100 is controlled to operate, and the safety requirement is met.

In the closing process of the door body 12, the lower door hook 28 is close to the rotating lever 40, when the lower door hook 28 abuts against the rotating lever 40, the rotating lever 40 can be driven to rotate clockwise, and in the process, the lower door hook 28 and the door body 12 can be decelerated, so that the door closing noise is further reduced.

In some embodiments, referring to fig. 5, 6 and 42-45, the rotating lever 40 includes a rotating arm 42 and a contact arm 44, the rotating arm 42 is rotatably connected to the bracket 14, the contact arm 44 is connected to the rotating arm 42, referring to fig. 5, 6 and 30, the bracket 14 is provided with a slot 46, the contact arm 44 is at least partially located in the slot 46, and the contact arm 44 is used for triggering the switch. Therefore, the rotating lever 40 can be protected from being triggered manually, and the safety requirements are met.

Specifically, the contact arm 44 is away from the rotating shaft of the rotating arm 42, and during the closing process of the door 12, the lower door hook 28 may extend into the bracket 14 through the lower through hole 48 of the front plate 51 connected to the bracket 14, and push the contact arm 44 to rotate, thereby driving the entire rotating lever 40 to rotate. The contact arm 44 is at least partially located in the slot 46, so that an external thin rod or other articles can be prevented from extending into the support 14 from the lower through hole 48 to push the contact arm 44 to rotate to artificially trigger the switch, and the household appliance 100 can mistakenly think that the door body 12 is closed, thereby causing a safety problem caused by starting.

In addition, the inner side of the protective cover 36 is further provided with a bump 50, and the shape of the bump 50 is matched with that of the slot 46 to surround the contact arm 44, so that the contact arm 44 is further prevented from being triggered by mistake, and meanwhile, the rotation of the contact arm 44 can be more stable.

In some embodiments, referring to fig. 34 to 39, the driving lever 20 includes a first arm 52 and a second arm 54 spaced apart from each other, and during the closing process of the door 12, the door hook passes under the second arm 54 and abuts against the first arm 52 to drive the driving lever 20 to rotate,

the contact arm 44 is provided with a boss 56,

the first arm 52 is provided with a notch 58, and during the closing process of the door body 12, the first arm 52 escapes from the convex column 56 through the notch 58. In this way, it is ensured that contact arm 44 of rotation lever 40 can pass through smoothly without interference.

Specifically, referring to fig. 4, when the door 12 is opened, the first arm 52 and the second arm 54 are both located on the left side of the boss 56. The first arm 52 is long, in the process that the door body 12 is closed, the lower door hook 28 firstly passes through the lower part of the second arm 54 and then enters the space between the first arm 52 and the second arm 54, then the lower door hook 28 is abutted against the first arm 52 to drive the rotating lever to rotate anticlockwise, in the rotating process of the driving lever 20, the second arm 54 clamps the lower door hook 28, the driving lever 20 drives the lower door hook 28 to continuously close the door, the first arm 52 rotates towards the direction of the convex column 56, and by arranging the notch 58, when the first arm 52 passes through, the first arm 52 does not interfere with the convex column 56, so that the lower door hook 28 can be abutted against the convex column 56 and drive the rotating lever 40 to rotate clockwise, the door body 12 can be smoothly closed, and the switch can be smoothly triggered. After the door body 12 is closed, the end of the lower hook 28 and the boss 56 are located in the space between the first arm 52 and the second arm 54, as shown in fig. 61.

In some embodiments, referring to fig. 30, the bracket 14 is further provided with a stop 72, and the stop 72 blocks at least a portion of the rotating arm 42. Therefore, the rotating lever 40 can be protected from being triggered manually, and the safety requirements are met.

Specifically, during the closing process of the door 12, the lower hook 28 can extend into the bracket 14 through the lower through hole 48 on the bracket 14, and push the contact arm 44 to rotate, thereby driving the entire rotating lever 40 to rotate. By arranging the stopper 72, the stopper 72 shields at least a part of the rotating arm 42, so that articles such as external thin rods can be prevented from extending into the bracket 14 from the lower through hole 48 to push the rotating arm 42 to rotate to artificially trigger the switch, and the household appliance 100 mistakenly thinks that the door body 12 is closed, thereby further starting to cause safety problems.

In addition, referring to fig. 20, another stopper 72 is further disposed on the inner side of the protection cover 36, and the shape of the stopper 72 on the bracket 14 matches the shape of the stopper 72 on the protection cover 36, so as to completely shield the rotating arm 42, and further ensure that the rotating arm 42 is not triggered by mistake.

It is understood that in other embodiments, the stop 72 on the bracket 14 may fully block the pivot arm 42.

In some embodiments, the top surface of the stop 72 includes a ramp 74, and the ramp 74 is used to guide the hook into abutment with the contact arm 44 during closing of the door 12. Therefore, the door hook can be ensured to enter a normal position to be contacted with the rotating lever 40 in the closing process of the door body 12.

Specifically, during the closing process of the door body 12, the lower door hook 28 moves close to the rotating lever 40, when the lower door hook 28 reaches the inclined plane 74, the inclined plane 74 guides the tail end of the lower door hook 28 to the contact arm 44, so that the lower door hook 28 can contact with the convex column 56 of the contact arm 44, and when the lower door hook 28 continues to move, the lower door hook 28 drives the rotating lever 40, so that the rotating lever 40 can trigger the switch.

In some embodiments, the hooks include a lower hook 28, and the rack 14 is provided with a first switch 76 including a second switch 78 and a third switch 80.

The damping assembly 16 is configured such that, during the closing process of the door body 12, the driving lever 20 is driven by the lower hook 28 to trigger the first switch 76, the rotating lever 40 is driven by the lower hook 28 to trigger the second switch 78, and then trigger the third switch 80. In this way, after the driving lever 20 triggers the first switch 76, the rotating lever 40 sequentially triggers the second switch 78 and the third switch 80, so that the first switch 76, the second switch 78 and the third switch 80 are sequentially triggered, and the problem of disordered triggering sequence of switches is avoided.

In particular, the household appliance 100 may comprise a microwave oven comprising a first switch 76, a second switch 78 and a third switch 80. The first switch 76 may be a monitor switch for monitoring the entire circuit of the microwave oven. The second switch 78 may be a secondary switch for controlling the activation of the lamp and the heat sink fan or other components. The third switch 80 may be a primary switch for controlling a microwave function of the microwave oven. During the closing process of the door 12, the first switch 76, the second switch 78 and the third switch 80 are sequentially triggered to generate corresponding electrical signals, so that the control panel of the microwave oven can control the operation of the microwave oven.

The sequence of activation of the three switches is particularly important during use of the microwave oven by the user. In the door closing process, the triggering sequence is as follows: first the monitor switch is triggered, second the secondary switch is triggered, and finally the primary switch is triggered. Therefore, the use safety of the user can be ensured and the safety requirements can be met.

It is understood that, in other embodiments, the number of switches is not limited to three, and other numbers of switches may be used, and the number of switches and the triggering order are set in practice, and are not limited specifically here.

In some embodiments, the hook end has a first guide surface 82;

referring to fig. 34 to 39, the driving lever 20 includes a first arm 52 and a second arm 54 spaced apart from each other, and a second guide surface 84 is provided on a side surface of the second arm 54, and when the door 12 is closed, the first guide surface 82 is in fit connection with the second guide surface 84, so that the end of the hook passes around the second arm 54 and then the second arm 54 catches the hook. Therefore, in the process that the door body 12 is closed, the first guide surface 82 is connected with the second guide surface 84 in a matched mode, the tail end of the door hook bypasses the second arm 54, then the second arm 54 clamps the door hook, the forced door closing structural design is achieved, after the driving lever 20 is abnormally triggered, disassembly and maintenance can be omitted, and a user can restore to normal after the door is forcibly closed.

Specifically, please refer to fig. 22 to 27, the end of the lower door hook 28 is provided with a hook portion 86, and the hook portion 86 can be conveniently engaged. The lower hook 28 includes a first guide surface 82, and the first guide surface 82 may be disposed on the hook portion 86, such that the user can easily force the door to close, so that the lower hook 28 and the actuating lever 20 return to the normal engagement position.

Under the condition of normal door closing, under a certain initial speed condition of the lower door hook 28, the lower door hook 28 contacts the first arm 52 of the driving lever 20, the lower door hook 28 can rotate the driving lever 20, the driving lever 20 rotates to trigger the first switch 76, then the second arm 54 of the driving lever 20 clamps the lower door hook 28 to drive the lower door hook 28 to continue to close the door, and the lower door hook 28 abuts against the contact arm 44 to rotate the rotating lever 40.

However, it is easy in real life for a user or a child or the like to force the actuation lever 20 to be triggered by an abnormal means (as shown in fig. 65), such as: the driving lever 20 is shifted by extending a slender article such as a bamboo stick or a finger into the bracket 14, so that the driving lever 20 is forced to be triggered, the driving lever 20 rotates, the lower door hook 28 cannot be matched with the driving lever 20, the door body 12 cannot be closed, the household appliance 100 loses the use function, and even needs to be disassembled for maintenance. The utility model discloses embodiment's domestic appliance 100, lower door collude 28 end and have first spigot surface 82, and drive lever 20 includes second spigot surface 84, and first spigot surface 82 is connected with the cooperation of second spigot surface 84, can make the door collude the end and block lower door collude 28 around second arm 54 after second arm 54, and the user uses great power can resume lower door collude 28 and the normal cooperation of drive lever 20 and is concerned with, needn't tear the quick-witted maintenance.

In one embodiment, the end of the lower hook 28 may be forced through the gap between the second arm 54 of the actuating lever 20 and the bracket 14 by elastic deformation of the plastic. The first and second guide surfaces 82 and 84 may be guide ramps.

The following describes a principle procedure of opening and closing the door according to an embodiment of the present invention.

Description of initial and terminal states: at the initial moment (moment of closing the door), the single driving elastic member 60 connects the bracket 14 and the driving lever 20, the force F of the single driving elastic member 60 is located above the rotation center O of the driving lever 20, and at this time, the force F of the single driving elastic member 60 forces the driving lever 20 to have a tendency of rotating clockwise, and the single driving elastic member 60 is always kept in a stretched state. Meanwhile, the driving lever 20 is limited by the stop column 88 on the bracket 14 to move clockwise, the swing block 34 is respectively connected with the damper 18 and the driving lever 20, the swing block 34 can freely rotate around the driving lever 20, and the pressure spring 32 is always in a compressed state. At the end of the moment (moment after opening the door), the lower hook 28 pulls the actuating lever 20 outwards, at which point the angle between the oscillating mass 34 and the actuating lever 20 is at its maximum, and the single actuating elastic element 60 and the damper 18 are moved. During the movement, when the force F of the single driving elastic member 60 is located above the rotation center O of the driving lever 20, the force F provided to the driving lever 20 by the single driving elastic member 60 is changed from a counterclockwise force to a clockwise force to rotate the driving lever 20. After the lower hook 28 is pulled out, the driving lever 20 actively rotates clockwise to the initial position, and the single driving elastic member 60 and the damper 18 are restored to the initial state.

The stable door closing process of slow door closing/soft door closing is realized:

as shown in fig. 4 and 59 to 61, the lower door hook 28 firstly contacts the first arm 52 of the driving lever 20 under a certain initial speed condition, and forces the driving lever 20 to rotate counterclockwise around the rotating shaft by a preset angle and then to coincide with the swing block 34. During this predetermined angle, the damper 18 does not provide a blocking effect (i.e., the lower hook 28 does not rebound significantly after colliding with the first arm 52, so as to prevent the lower hook 28 from colliding back and forth in the space between the first arm 52 and the second arm 54, resulting in a stagnation). At the same time, the force F of the single driving elastic member 60 is rotated below the rotation center O of the driving lever 20, and the second arm 54 of the driving lever 20 is rapidly brought into contact with the lower door hook 28.

As shown in fig. 61, when the acting force F of the single driving elastic member 60 is located below the rotation center O of the driving lever 20, the acting force F of the single driving elastic member 60 becomes a force that rotates the driving lever 20 counterclockwise, and the driving lever 20 drives the swing block 34 to rotate together and drives the lower hook 28 to move; at the same time, the upper door hook 26 extends into the upper through hole 90 of the front plate 51 to start to press down the inclined block 30. The actuating lever 20 first activates the monitoring switch. Subsequently, the end of the lower door hook 28 touches the boss 56 of the contact arm 44 of the rotating lever 40, and the rotating lever 40 starts to rotate, which in turn triggers the secondary switch and the primary switch (the secondary switch is stacked above the primary switch). Meanwhile, the tail end of the upper door hook 26 presses the top of the inclined block 30, and the inclined block 30 begins to rise to abut against the arc on the left side of the tail end of the upper door hook 26. And the door closing is finished until the movement is stopped.

(II) realizing the door opening process of slow door closing/soft door closing:

referring to fig. 62 to 64 and 4, when the door is driven by a human power, the lower door hook 28 drives the driving lever 20 to rotate clockwise, the lower door hook 28 is disengaged from the protruding post 56 of the contact arm 44 of the rotating lever 40, and the primary switch and the secondary switch are not turned on in sequence. The upper hook 26 then presses against the ramp 30, moving outward until it is completely disengaged. Then, the driving lever 20 is out of contact with the monitor switch. In this process, the acting force F of the single driving elastic member 60 is changed from a force forcing the counterclockwise rotation of the driving lever 20 to a clockwise rotation force. After the lower hook 28 is pulled out, the driving lever 20 is actively rotated to the initial position. Finally, the single driving elastic member 60, the inclined block 30, the rotation lever 40 and the damper 18 are all restored to the initial state, and the opening of the door is finished.

(III) forced door closing process:

as shown in fig. 65, the door is not closed, but the actuating lever 20 is triggered. At this time, the door body 12 can be strongly pushed to perform the door closing action, and the lower door hook 28 can return to the normal door closing position. This is because the end of the lower hook 28 can be forced through the gap between the second arm 54 of the actuating lever 20 and the bracket 14 by elastic deformation of the plastic. The two guide surfaces can ensure smooth forced closing of the door.

In the description of the present specification, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A household appliance, characterized in that it comprises:

a support;

the door body is rotationally connected with the bracket and is provided with a door hook;

2. The household appliance according to claim 1, wherein the force of the single driving elastic member is located above the center of rotation of the driving lever in a case where the door body is opened;

and under the condition that the door body is closed, the acting force of the single driving elastic piece is positioned below the rotation center of the driving lever.

3. The household appliance according to claim 1, wherein during the door closing process, the tangential component of the single driving elastic member is switched from providing a torque for the driving lever to rotate in a first direction to providing a torque for the driving lever to rotate in a second direction, wherein the first direction is opposite to the second direction, and the torque for the driving lever to rotate in the second direction is used for accelerating the door closing process.

4. The household appliance according to claim 1, wherein the bracket is provided with a through hole, the single driving elastic member and the driving lever are respectively arranged on two opposite sides of the bracket, and the connecting portion penetrates through the through hole.

5. The household appliance according to claim 1, wherein the buffer assembly further comprises a swing block, the swing block is rotatably connected with the driving lever and the damper, the driving lever is rotated by a preset angle to drive the swing block to compress the damper under the condition that the door hook applies an acting force to the driving lever, and the damper provides damping to the door hook and rotates when being compressed.

6. The household appliance of claim 1, wherein the buffer assembly further comprises a rotating lever, a switch is disposed on the bracket, the rotating lever is rotatably connected with the bracket,

7. The household appliance of claim 6, wherein the rotary lever comprises a rotary arm and a contact arm, the rotary arm is rotatably connected to the bracket, the contact arm is connected to the rotary arm, the bracket defines a slot, the contact arm is at least partially located in the slot, and the contact arm is used for triggering the switch.

8. The household appliance according to claim 7, wherein the driving lever comprises a first arm and a second arm which are spaced, the door hook abuts against the first arm after passing under the second arm to drive the driving lever to rotate when the door body is closed,

the contact arm is provided with a convex column,

9. The household appliance according to claim 7, wherein the bracket is further provided with a stopper, the stopper covering at least a portion of the rotating arm.

10. The household appliance of claim 1, wherein the door hook end has a first guide surface;

the driving lever comprises a first arm and a second arm which are spaced, a second guide surface is arranged on the side surface of the second arm, and in the process that the door body is closed, the first guide surface is matched and connected with the second guide surface, so that the tail end of the door hook bypasses behind the second arm, and the second arm blocks the door hook.