CN113622777A

CN113622777A - Door opening and closing mechanism and household appliance

Info

Publication number: CN113622777A
Application number: CN202110995832.1A
Authority: CN
Inventors: 吴延岐
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: 2021-08-27
Filing date: 2021-08-27
Publication date: 2021-11-09
Anticipated expiration: 2041-08-27
Also published as: CN113622777B

Abstract

The invention discloses a door opening and closing mechanism and a household appliance. The switching door mechanism includes: the door hook is used for being installed on a door body of the household appliance; the bracket is used for being installed in a cavity of the household appliance; the damping assembly is installed on the support and comprises a rotary damper and a conversion structure, the conversion structure is connected with the rotary damper, and the damping assembly is configured to enable the conversion structure to drive the rotary damper to rotate and provide acting force which is accelerated and then decelerated for the door hook under the condition that the door hook applies acting force to the conversion structure. Among the above-mentioned switch door mechanism, under the door hook applys the condition of effort to transform structure, transform structure can drive rotatory damper and rotate, and damping subassembly can provide earlier acceleration then the effort that slows down to the door hook, and then can realize the slow door/soft door that closes of the door body, avoids causing the noise sharply-increased and influence user experience of closing the door.

Description

Door opening and closing mechanism and household appliance

Technical Field

The invention relates to the technical field of household appliances, in particular to a door opening and closing mechanism and a household appliance.

Background

At present, the household appliance with the door body can realize the functions of storing articles, cooking food and the like for a user, and the user can take and place the articles by opening and closing the door. In the whole process of opening and closing the door, the door is driven by manpower or the inertia of the door body, no buffer design is adopted, and the door closing noise is strongly related to the force of closing the door by hands. Therefore, when the user closes the door with a large force, the door closing noise is increased sharply, and the user experience is seriously affected.

Disclosure of Invention

The embodiment of the invention provides a door opening and closing mechanism and a household appliance.

An opening and closing mechanism according to an embodiment of the present invention includes:

the door hook is used for being installed on a door body of the household appliance;

the bracket is used for being installed in a cavity of the household appliance;

the damping assembly is installed on the support and comprises a rotary damper and a conversion structure, the conversion structure is connected with the rotary damper, and the damping assembly is configured to enable the conversion structure to drive the rotary damper to rotate and provide acting force which is accelerated and then decelerated for the door hook under the condition that the door hook applies acting force to the conversion structure.

Among the above-mentioned switch door mechanism, under the door hook applys the condition of effort to transform structure, transform structure can drive rotatory damper and rotate, and damping subassembly can provide earlier acceleration then the effort that slows down to the door hook, and then can realize the slow door/soft door that closes of the door body, avoids causing the noise sharply-increased and influence user experience of closing the door.

In some embodiments, the door hook includes an upper door hook connected to the door body by a door hook elastic member and a lower door hook fixed to the door body.

In some embodiments, the bracket is provided with an upper through hole, and a lower side wall of the upper through hole is inclined upwards towards the inside of the bracket along a vertical direction and used for guiding the upper door hook to move upwards.

In some embodiments, the conversion structure comprises:

the pressing piece is rotationally connected with the bracket;

a rotating member rotatably coupled to the bracket, the rotating member being restricted by the pressing member with the door hook separated from the pressing member;

and the driving piece is connected with the rotary damper, and is limited by the rotating piece under the condition that the door hook is separated from the pressing piece.

In some embodiments, the switching structure further comprises a first resilient member connecting the bracket and the driving member.

In certain embodiments, the drive member comprises first and second spaced drive arms, the first resilient member being connected to the first drive arm;

the rotating part comprises a first rotating arm which abuts against the second driving arm.

In some embodiments, the rotating member includes a second rotating arm, and the pressing member limits the rotating member by the second rotating arm.

In some embodiments, the rotating member includes a third rotating arm, and the rotating member is driven such that the pressing member forms a limit for the second rotating arm when the driving member drives the third rotating arm to move.

In some embodiments, the switching structure further includes a second elastic member, the second elastic member connects the bracket and one end of the pressing member, and the other end of the pressing member is engaged with the second rotating arm.

In some embodiments, the driving member has a coupling hole, a first tooth portion is disposed on a wall of the coupling hole, the rotary damper includes a rotating shaft passing through the coupling hole, and a second tooth portion coupled to the first tooth portion is disposed on an outer wall of the rotating shaft.

A home appliance of an embodiment of the present invention includes:

a cavity;

the door body is rotationally connected to one side of the cavity;

in the door opening and closing mechanism in any one of the above embodiments, the bracket is installed in the cavity, and the door hook is installed in the door body.

Among the above-mentioned domestic appliance, under the condition that the effort was applyed to transform structure at the door hook, transform structure can drive rotary damper and rotate, and damping subassembly can provide earlier acceleration then the effort that slows down to the door hook, and then can realize that the slow of the door body closes the door/soft door that closes, avoids causing the noise sharp increase of closing the door and influences user experience.

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 is a partial structural schematic view of a home appliance according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a door opening and closing mechanism according to an embodiment of the present invention;

FIG. 3 is another schematic structural view of a door opening and closing mechanism according to an embodiment of the present invention;

fig. 4 to 7 are partial structural schematic views of a door opening and closing mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a drive member according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a rotary damper according to an embodiment of the present invention;

fig. 10 to 14 are schematic views illustrating a closing operation process of the door opening and closing mechanism 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 with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to 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 and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

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 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 letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1 to 3, a door opening and closing mechanism 100 according to an embodiment of the present invention includes:

a door hook for being mounted on the door body 200 of the home appliance;

a bracket 102 for mounting in a household appliance cavity;

the damping assembly 104 is mounted on the bracket 102, the damping assembly 104 includes a rotary damper 106 and a conversion structure 108, the conversion structure 108 is connected to the rotary damper 106, and the damping assembly 104 is configured to enable the conversion structure 108 to drive the rotary damper 106 to rotate and provide an acceleration force and a deceleration force to the door hook under the condition that the door hook applies a force to the conversion structure 108.

In the above-mentioned door opening and closing mechanism 100, under the condition that the door hook applyed the effort to transform structure 108, transform structure 108 can drive rotary damper 106 and rotate, and damping subassembly 104 can provide the effort that accelerates earlier then slows down to the door hook, and then can realize that the slow of the door body closes the door/soft door that closes, avoids causing the noise sharply-increased and influence user experience of closing the door.

Specifically, the household appliance may include a cavity and a door 200, and the door 200 is rotatably connected to one side of the cavity, for example, to the left or right side of a front panel 202 of the cavity, forming a side-opening type household appliance. The door opening and closing mechanism 100 according to the embodiment of the present invention may be applied to a side-opening type home appliance, and the bracket 102 may be fixed to the cavity front plate 202. The side-opening type household appliances include, but are not limited to, microwave ovens, ovens (including electric ovens, microwave ovens, and micro-steaming and baking integrated machines), steamers, dishwashers, disinfection cabinets, and other household appliances having the door 200. The cavity is provided with a cavity for storing articles or food. The household appliance can perform cleaning, storing, sterilizing, cooking and other operations on the articles placed in the chamber.

The specific number of the door hooks can be set according to actual needs, for example, the number of the door hooks can be single, two or more than two. In the embodiment of the present invention, the door hook includes two door hooks, i.e., an upper door hook 110 and a lower door hook 112.

Specifically, in the embodiment of the present invention, the upper door hook 110 is coupled to the door body 200 by the door hook elastic member 114, and the lower door hook 112 is fixed to the door body 200. During the closing process of the door body 200, the lower door hook 112 is opposite to the converting structure 108, and the damping assembly 104 is configured to enable the converting structure 108 to drive the rotary damper 106 to rotate under the condition that the lower door hook 112 applies an acting force to the converting structure 108, so that the damping assembly 104 provides an acting force of first accelerating and then decelerating to the lower door hook 112. In the illustrated embodiment, the lower door hook 112 may apply pressure to the switch structure 108.

Since the damping assembly 104 can provide an acting force for accelerating and then decelerating to the lower door hook 112, the door 200 can be closed by the acting force of the converting structure 108 in the acceleration stage, and the noise generated when the door 200 is closed in the deceleration stage is not too large. In the embodiment of the present invention, the rotary damper 106 may be a two-way damper, i.e. playing a role of damping deceleration in both clockwise and counterclockwise directions, it can be understood that in other embodiments, the rotary damper 106 may also be a one-way damper, and during the door closing process, the damping force may be provided.

In addition, in other embodiments, the lower door hook 112 may be connected to the door body 200 through a door hook elastic member 114, the upper door hook 110 is fixed to the door body 200, the upper door hook 110 is opposite to the converting structure 108 during the closing process of the door body 200, and the damping assembly 104 is configured to enable the converting structure 108 to drive the rotary damper 106 to rotate and provide an acting force of first acceleration and then deceleration to the upper door hook 110 when the upper door hook 110 applies an acting force to the converting structure 108.

For convenience of description, the following embodiments of the present invention are described in a first case where the door hook 110 is coupled to the door body 200 by the door hook elastic member 114 and the lower door hook 112 is fixed to the door body 200. Those skilled in the art can understand and implement the second case that the lower door hook 112 is connected to the door body 200 through the door hook elastic member 114 and the upper door hook 110 is fixed to the door body 200 with reference to the first case, and the present invention does not expand the second case in detail.

In one example, the door hook elastic member 114 may be a spring, in the present embodiment, the upper door hook 110 is connected by a door hook spring, the limit is guided by a sheet metal through hole of the door body 200 and a sheet metal bent structure, the lower door hook 112 is fixedly mounted on the door body 200, and the limit is guided by a sheet metal bent structure of the door body 200. Thus, the poor fit caused by the position deviation of the upper door hook 110 and the lower door hook 112 can be avoided.

Compared with the method of integrally connecting the upper door hook and the lower door hook, the upper door hook 110 of the embodiment of the invention is connected with the door body 200 through the door hook elastic member 114, and the lower door hook 112 is fixed on the door body 200, so that on one hand, the upper door hook 110 can be allowed to move upwards for a certain distance along the door body 200 in the door closing process, the door body 200 is easy to close, and the reset of the upper door hook 110 can be realized through the door hook elastic member 114, and on the other hand, when the fixed lower door hook 112 is abutted to the conversion structure 108, a stable acting force can be provided for the conversion structure 108, so that the situation that the position change of the lower door hook 112 causes additional component force, the smoothness of door closing is affected, and the structure is deformed is avoided.

In some embodiments, the bracket 102 is opened with an upper through hole 116, and a lower sidewall of the upper through hole 116 is inclined upward toward the inside of the bracket 102 along a vertical direction for guiding the upward movement of the upper door hook 110. Thus, the upper door hook 110 can be guided to be clamped on the bracket 102.

Specifically, during the closing process of the door body 200, the upper door hook 110 is driven by the door body 200 to start moving upward along the lower sidewall of the upper through hole 116, and at this time, the door hook elastic member 114 is stretched. In the process that the door body 200 is continuously closed, the upper door hook 110 moves to the right side of the lower side wall of the upper through hole 116, the stretched door hook elastic piece 114 resets the upper door hook 110, and the upper door hook 110 is clamped on the right side of the lower side wall of the upper through hole 116, so that the upper door hook 110 is locked with the cavity. In addition, a switch 118 (e.g., a micro switch) is further installed on the bracket 102, and when the upper door hook 110 is clamped on the right side of the lower sidewall of the upper through hole 116, the bottom of the upper door hook 110 triggers the switch 118 (as shown in fig. 14), so that the switch 118 outputs a door closing signal. The controller of the household appliance receives the door closing signal, and can determine that the door body 200 is closed in place. Only when the door body 200 is closed to the right position, the controller can control the household appliance to work, so that certain accidents, such as microwave leakage, steam leakage and the like, are avoided, and the use safety of the household appliance is ensured.

Preferably, the lower hook 112 protrudes from the door body 200 more than the upper hook 110, on one hand, when the lower hook 112 enters the cavity and is accelerated by the converting structure 108, the door body 200 is also accelerated, and simultaneously drives the upper hook 110 to enter the upper through hole 116, so as to realize interlocking. On the other hand, during the period from when the lower door hook 112 enters the cavity to when it abuts against the switching structure 108, the upper door hook 110 does not yet enter the cavity, and the door closing resistance can be reduced.

In some embodiments, the bracket 102 defines a lower opening 120, and the lower door hook 112 extends through the lower opening 120 to apply a force to the transition structure 108. In this manner, the lower door hook 112 can be made to apply a force to the switch structure 108.

Specifically, the inner diameter of the lower through hole 120 should be sized to allow the lower door hook 112 to freely enter and exit, so as to avoid physical interference with the lower door hook 112, and ensure smooth door opening and closing.

In some embodiments, referring to fig. 1, 4, 6, and 7, the conversion structure 108 includes:

a pressing member 122 rotatably coupled to the bracket 102;

a rotating member 124 rotatably coupled to the bracket 102, the rotating member 124 being restricted by the pressing member 122 in a state where the door hook is separated from the pressing member 122;

the driving member 126 is connected to the rotary damper 106, and the driving member 126 is stopped by the rotating member 124 in a state where the door hook is separated from the pressing member 122. In this way, the translational movement of the door hook can be converted into a rotational movement.

Specifically, in the illustrated embodiment, the lower door hook 112 is opposite to the switching structure 108 during the door closing process, and the rotating member 124 is restricted by the pressing member 122 in the case where the lower door hook 112 is separated from the pressing member 122, and the driving member 126 is restricted by the rotating member 124 in the case where the lower door hook 112 is separated from the pressing member 122.

The pressing member 122 and the rotating member 124 are rotatably mounted to the bracket 102 via a rotating shaft. In the case where the lower door hook 112 is separated from the pressing member 122, the rotating member 124 is restricted by the pressing member 122, and it is understood that the rotating member 124 is restricted by the pressing member 122 not to rotate freely, or the rotating member 124 is kept stationary. With the lower door hook 112 separated from the pressure piece 122, the driving member 126 is restrained by the rotating member 124, and it is understood that the driving member 126 is restrained by the rotating member 124 from freely rotating or the driving member 126 remains stationary. That is, when the lower door hook 112 does not apply a force to the pressing member 122, the pressing member 122 limits the rotating member 124, and the rotating member 124 limits the driving member 126, so that the rotating member 124 and the driving member 126 are finally kept stationary. In one example, the compression member 122 may be a compression bar.

In certain aspects and implementations, the shift structure 108 further includes a first resilient member 128, the first resilient member 128 connecting the bracket 102 and the driving member 126. In this manner, the first resilient member 128 can apply a force to the driving member 126 to accelerate the movement of the lower door hook 112.

Specifically, the first resilient member 128 is configured to provide a force to the driving member 126 to cause the driving member 126 to have a tendency to rotate, which can be used to accelerate the lower door hook 112. Referring to fig. 5, the driving member 126 includes a first driving arm 130 and a second driving arm 132 spaced apart from each other, and the second driving arm 132 is closer to the door body 200 (door hook) than the first driving arm 130, and the second driving arm 132 is longer than the first driving arm 130 relative to the rotation axis of the driving member 126. The first drive arm 130 and the second drive arm 132 define a generally U-shaped space 134 therebetween.

One end of the first elastic member 128 is connected to the first driving arm 130, and the other end of the first elastic member 128 is assembled to the positioning post of the bracket 102. In the initial state of the driving member 126 (i.e., the lower door hook 112 is not yet in contact with the switching structure 108), the first elastic member 128 is in a stretched state, and applies a pulling force to the first driving arm 130. In the illustrated embodiment, the first elastic member 128 is a tension spring.

During the door closing process, the lower door hook 112 can extend into the space 134 between the first driving arm 130 and the second driving arm 132, and the U-shaped space 134 allows the lower door hook 112 to extend smoothly. The second driving arm 132 is engaged with the lower door hook 112, and under the pulling force of the first elastic member 128, the driving member 126 rotates counterclockwise, and the second driving arm 132 pulls the lower door hook 112, so that the lower door hook 112 can be accelerated. In the illustrated embodiment, the drive member 126 may be a drive lever.

It is understood that in other embodiments, the first resilient member 128 may be coupled to other portions of the driving member 126. The first resilient member 128 may also be in a compressed state to provide a pushing force to the driving member 126.

In certain embodiments, the drive member 126 includes spaced apart first and second drive

arms

130, 132, with the first resilient member 128 connected to the first drive arm 130;

the rotating member 124 includes a first rotating arm 136, and the first rotating arm 136 abuts against the second driving arm 132. In this way, the driving member 126 is in a force balance state under the limit of the rotating member 124 and the action of the first elastic member 128.

Specifically, referring to fig. 2 and fig. 5, a cylinder 138 extends from the end of the second driving arm 132 toward the bracket 102, the cylinder 138 abuts against the upper side of the first driving arm 136, and the first elastic element 128 applies a pulling force to the first driving arm 130, so that the driving element 126 tends to rotate counterclockwise. Since the first rotating arm 136 abuts and limits the second driving arm 132 through the cylinder 138, the driving member 126 is disposed at the leftmost side, and at this time, the force system is balanced, and the converting structure 108 is stationary. In the illustrated embodiment, the rotational member 124 may be a rotational lever.

In some embodiments, the rotating member 124 includes a second rotating arm 140, and the pressing member 122 limits the rotating member 124 via the second rotating arm 140. In this manner, the pressing member 122 may be made to limit the rotation member 124.

Specifically, the pressing member 122 has a hook 142 at one end thereof, and the hook 142 presses against a cylinder 144 at the end of the second rotating arm 140 of the rotating member 124, so that the rotating member 124 tends to be restricted from rotating. During the door closing process, the lower door hook 112 may apply a force (pressure) to the pressing member 122, so that the pressing member 122 rotates to release the position of the rotating member 124, and then release the position of the driving member 126, so that the driving member 126 can rotate, and the driving member 126 drives the lower door hook 112 to accelerate under the action of the first elastic member 128 via the second driving arm 132.

In some embodiments, the rotating member 124 includes a third rotating arm 146, and when the driving member 126 drives the third rotating arm 146 to move, the rotating member 124 is driven such that the pressing member 122 forms a limit for the second rotating arm 140. In this manner, the pressing member 122 can be caused to re-limit the rotation member 124.

Specifically, in the case where the door body 200 is closed in place, the pressing member 122 does not limit the rotating member 124. In the process of opening the door body 200, the driving member 126 rotates in the opposite direction to the rotating direction when the door is closed, and the third rotating arm 146 drives the rotating member 124 to rotate in the opposite direction, so that the pressing member 122 re-forms the position limitation on the second rotating arm 140, and the re-position limitation on the rotating member 124 is further realized.

In some embodiments, the switch structure 108 further includes a second elastic member 148, the second elastic member 148 connects the bracket 102 and one end of the pressing member 122, and the other end of the pressing member 122 is engaged with the second rotating arm 140. In this way, the second elastic element 148 can apply a force to the pressing element 122, so that the rotating element 124 has a tendency to rotate.

Specifically, the second elastic element 148 is used to provide a force to the pressing element 122 to cause the pressing element 122 to have a tendency to rotate, which is used to cause the rotating element 124 to rotate to form a limit on the driving element 126.

In the illustrated embodiment, the second elastic member 148 may be a compression spring, the second elastic member 148 and the second rotating arm 140 are located at two sides of the rotating shaft of the pressing member 122, and the second elastic member 148 provides a pushing force to the pressing member 122, so that the pressing member 122 has a tendency to rotate counterclockwise. The pressing member 122, which has a tendency to rotate counterclockwise, provides a force to the rotating member 124 such that the rotating member 124 also has a tendency to rotate counterclockwise.

It is understood that in other embodiments, the second resilient member 148 may also provide a pulling force to the compression member 122.

In some embodiments, referring to fig. 8 and 9, the driving member 126 is provided with a coupling hole 150, a first tooth portion 152 is provided on a hole wall of the coupling hole 150, the rotary damper 106 includes a rotating shaft passing through the coupling hole 150, and a second tooth portion 154 coupled with the first tooth portion 152 is provided on an outer wall of the rotating shaft. In this way, the coupling between the driver 126 and the rotational damper 106 can be made tight.

Specifically, in the illustrated embodiment, the first tooth portion 152 is continuously provided along the hole wall of the coupling hole 150 by 360 degrees, and the second tooth portion 154 is continuously provided along the outer circumferential surface of the rotation shaft by 360 degrees, thereby further improving the tightness of the coupling. It is understood that in other embodiments, the first teeth 152 may be spaced 360 degrees apart along the hole wall of the coupling hole 150, and the second teeth 154 may be disposed in the same manner or in a different manner than the first teeth 152.

The following explains a principle process of the opening and closing mechanism 100 according to the embodiment of the present invention.

At the initial time (please refer to fig. 10, the lower door hook 112 is not yet abutted with the switching structure 108), the second elastic member 148 is in a compressed state, and since the second elastic member 148 has a tendency to recover the deformation, the second elastic member 148 has a rebound force (pushing force) on the pressing member 122, so that the pressing member 122 has a tendency to rotate counterclockwise, the hook 142 at the left end of the pressing member 122 presses the cylinder 144 at the end of the second rotating arm 140 of the rotating member 124, so that the rotating member 124 has a tendency to rotate counterclockwise, and the first rotating arm 136 of the rotating member 124 abuts the cylinder 138 at the end of the second driving arm 132 of the driving member 126. Due to the action of the first elastic element 128, the driving element 126 has a tendency of rotating counterclockwise, and the first rotating arm 136 of the rotating element 124 is limited to the left or right, so that the driving element 126 is disposed at the leftmost side, and the planar force system is balanced and the structure is stationary. In the planar force system, the deformation of the bracket 102 is small, and the existence of the force system perpendicular to the third direction of the bracket 102 in the related art is avoided, so that the deformation of the bracket 102 is large.

The door closing process of the slow-closing/soft-closing door opening and closing mechanism 100: (clockwise and counterclockwise determination, see FIG. 1 for front view.)

1) As shown in fig. 10-14, the lower door hook 112 passes through the left end of the second driving arm 132 of the driving member 126 first under a certain initial speed or a certain inertia force, and there is no interference between the two, during the process that the lower door hook 112 enters the cavity, the top of the pressing member 122 is the first contact, the lower surface of the right end of the lower door hook 112 has a downward pressing effect on the top of the pressing member 122, the pressing rod is driven to rotate clockwise, the clockwise rotation of the pressing member 122 can make the end cylinder 144 of the second rotating arm 140 of the rotating member 124 disengage from the left hook 142 of the pressing member 122, the rotating member 124 rotates clockwise, the limiting effect on the driving member 126 is lost, the driving member 126 rotates counterclockwise under the effect of the first elastic member 128, and due to the larger initial stretching amount of the first elastic member 128, a larger pulling force is provided, and the driving member 126 rotates counterclockwise under the larger pulling force, thereby driving the lower door hook 112 to slowly accelerate into the cavity, and realizing the acceleration stage. In this process, the amount of stretch in the first elastic member 128 is reduced, and the amount of tension provided is also reduced. Specifically, when the lower door hook 112 accelerates to enter the cavity, the rotary damper 106 has a clockwise damping force, when the clockwise damping force provided by the rotary damper 106 is greater than the pulling force provided by the first elastic member 128, the motion state of the driving member 126 is accelerated to be decelerated, the lower door hook 112 is also accelerated to be decelerated, meanwhile, the lower door hook 112 is linked with the door body 200 to accelerate and then decelerate, the rotary damper 106 performs a damping and decelerating function, and when the door body 200 is closed in place, noise can be reduced.

2) At the moment the door is closed to the right, the driving member 126 reaches the rightmost position, and the door 200 is closed to the right.

3) During the door closing process, the upper door hook 110 enters the cavity under the driving of the lower door hook 112 and starts to move upwards along the lower side wall (guiding structure) of the upper through hole 116, until the upper door hook 110 moves to the right side of the lower side wall of the upper through hole 116, the upper door hook 110 is clamped, and the lower door hook 112 is clamped to the rightmost side by the driving member 126, so that the interlocking is realized.

(II) the door opening process of the slow door closing/soft door closing mechanism: (reverse movement of door closing process)

1) The upper door hook 110 moves to the top end of the lower side wall of the upper through hole 116 under the drive of the manual power, the lower door hook 112 moves synchronously, at this time, the lower door hook 112 starts to contact with the driving member 126, the driving member 126 rotates clockwise, the rotary damper 106 rotates clockwise with damping, the end cylinder 138 of the second driving arm 132 of the driving member 126 presses the first rotating arm 136 of the rotating member 124, the end cylinder 138 of the second driving arm 132 contacts the third rotating arm 146 of the rotating member 124 during the clockwise rotation of the driving member 126, so that the rotating member 124 rotates counterclockwise, and simultaneously, the end cylinder 144 of the second rotating arm 140 of the rotating member 124 rotates counterclockwise to enter the left hook 142 of the pressing member 122, the pressing member 122 limits the driving member 126, and the lower door hook 112 is separated from the driving member 126. The damping assembly 104 again reaches force balance.

2) Under the drive of human power, the lower door hook 112 drives the driving member 126 to rotate clockwise, and at the same time, the upper door hook 110 slides along the lower sidewall of the upper through hole 116 and is separated, and the door 200 is opened.

An embodiment of the present invention also provides a home appliance, including:

a cavity;

a door body 200 rotatably connected to one side of the cavity;

in the door opening and closing mechanism 100 according to any of the above embodiments, the bracket 102 is installed in the cavity, and the door hook is installed in the door body 200.

Among the above-mentioned domestic appliance, under the condition that the door hook applyed the effort to transform structure 108, transform structure 108 can drive rotary damper 106 and rotate, and damping subassembly 104 can provide the effort that accelerates earlier then slows down to the door hook, and then can realize that the slow of the door body closes the door/soft door that closes, avoids causing the noise sharply-increased and influence user experience of closing the door.

It should be noted that the above explanation of the embodiment and the advantageous effects of the door opening and closing mechanism 100 is also applicable to the household appliance of the present embodiment, and is not detailed here to avoid redundancy.

In the description herein, references to 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 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 door opening and closing mechanism, comprising:

the bracket is used for being installed in a cavity of the household appliance;

2. The door opening and closing mechanism according to claim 1, wherein the door hook comprises an upper door hook and a lower door hook, the upper door hook is connected with the door body through a door hook elastic member, and the lower door hook is fixed on the door body.

3. The door opening and closing mechanism according to claim 2, wherein the bracket is provided with an upper through hole, and a lower side wall of the upper through hole is inclined upward toward the inside of the bracket along a vertical direction for guiding the upper door hook to move upward.

4. The switching door mechanism according to claim 1, wherein the switching structure comprises:

the pressing piece is rotationally connected with the bracket;

5. The door opening and closing mechanism according to claim 4, wherein said switching structure further comprises a first elastic member connecting said bracket and said driving member.

6. A switch door mechanism as claimed in claim 5, wherein said drive member includes first and second spaced drive arms, said first resilient member being connected to said first drive arm;

7. The door opening and closing mechanism according to claim 4, wherein the rotating member includes a second rotating arm, and the pressing member restricts the rotating member by the second rotating arm.

8. The door opening and closing mechanism according to claim 7, wherein the rotating member includes a third rotating arm, and in a case where the driving member drives the third rotating arm to move, the rotating member is driven so that the pressing member forms a limit for the second rotating arm.

9. The door opening and closing mechanism according to claim 7, wherein the switching structure further comprises a second elastic member, the second elastic member connects the bracket and one end of the pressing member, and the other end of the pressing member is engaged with the second rotating arm.

10. The door opening and closing mechanism according to claim 4, wherein the driving member has a coupling hole, a first tooth portion is formed on a wall of the coupling hole, the rotary damper includes a rotary shaft passing through the coupling hole, and a second tooth portion coupled to the first tooth portion is formed on an outer wall of the rotary shaft.

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

a cavity;

the door body is rotationally connected to one side of the cavity;

the door opening and closing mechanism according to any one of claims 1 to 10, wherein the bracket is mounted to the cavity, and the door hook is mounted to the door body.