CN211144160U - Household appliance and door opening driving mechanism thereof - Google Patents

Abstract

The embodiment of the application provides a household appliance and a door opening driving mechanism thereof, wherein the door opening driving mechanism comprises at least two groups of transmission assemblies, a limiting part and a driving gear, and each group of transmission assemblies is provided with a connecting position for connecting with a door body; the driving gear is in driving connection with at least one group of transmission assemblies so as to drive the connection positions of the at least two groups of transmission assemblies to move towards the direction of approaching to each other or moving away from each other; the limiting part is contacted with the transmission component in a stopping way. The actuating mechanism that opens door of this application embodiment can drive multiunit transmission assembly simultaneously through a drive gear and move and then drive the door body and open or close, therefore makes the actuating mechanism that opens door of this application embodiment structure compacter, and the external dimension can be done comparatively smallly and smallly, is particularly useful for the less domestic appliance of size.

Description

Household appliance and door opening driving mechanism thereof

Technical Field

The application relates to the technical field of door opening of household appliances, in particular to a household appliance and a door opening driving mechanism thereof.

Background

Household appliances such as air conditioner, room heater are provided with two doors in air outlet department, and when needs blow, the actuating mechanism that opens the door drives two doors and opens, and when not needing the during operation, the actuating mechanism that opens the door drives two closings of opening the door. In the household appliance with the air conditioner with the larger volume, the installation space in the shell is larger, and the door opening driving mechanism is installed in enough installation space, so that the double door opening mechanism mostly adopts a plurality of motors, and each motor drives one door to open or close. For the household appliances with the warmer and the same volume being smaller, the installation space in the shell is very limited, and the door opening driving mechanism with smaller volume is needed to drive the double doors.

Disclosure of Invention

In view of the above, it is desirable to provide a compact household appliance and a door opening driving mechanism thereof.

To achieve the above object, an aspect of the embodiments of the present application provides a door opening driving mechanism of a home appliance, including: the door lock comprises two groups of transmission assemblies, a limiting part and a driving gear, wherein each group of transmission assemblies is provided with a connecting position for connecting with a door body; the driving gear is in driving connection with at least one group of transmission assemblies so as to drive the connection positions of the two groups of transmission assemblies to move towards the direction of approaching to each other or moving away from each other; the limiting part is contacted with the transmission component in a stopping way.

Furthermore, each group of transmission assemblies comprises a transmission gear and a swing rod, one end of the swing rod is coaxially connected with the transmission gear, the connection position is located at one end, far away from the transmission gear, of the swing rod, and the transmission gears of at least two groups of transmission assemblies are in meshing transmission; the transmission gears of at least one group of transmission assemblies are sector gears, and the sector gears comprise first positioning surfaces and second positioning surfaces which are arranged at intervals along the rotation direction; the limiting part can be selectively contacted with the first positioning surface or the second positioning surface in a stop way.

Furthermore, the number of the transmission assemblies is two, and the transmission gears of each transmission assembly are sector gears.

Further, the first positioning surface extends along the radial direction of the sector gear, the second positioning surface extends along the radial direction of the sector gear, and the central angle corresponding to the interval between the first positioning surface and the second positioning surface is larger than 180 degrees.

Furthermore, the edge of the sector gear along the rotation direction is provided with special-shaped teeth, and the special-shaped teeth of the sector gears in the two groups of transmission assemblies are matched.

Further, actuating mechanism opens door includes the box body subassembly, the box body subassembly includes the box body, the box body is formed with hollow chamber that holds, drive gear and drive gear is located hold the intracavity.

Furthermore, the limiting part is formed into a side wall corresponding to the box body.

Furthermore, a first protrusion extending towards the first positioning surface is formed on the side wall corresponding to the box body, and the first protrusion is arranged corresponding to the first positioning surface; and/or a second protrusion extending towards the second positioning surface is formed on the corresponding side wall of the accommodating cavity, and the second protrusion and the second positioning surface are correspondingly arranged.

Further, the transmission assembly comprises a driving shaft, the transmission gear and the swing rod are fixedly sleeved on the driving shaft, one end of the driving shaft protrudes out of the box body, and the swing rod is connected to the part, located on the outer side of the box body, of the driving shaft.

Further, a special-shaped hole is formed in the swing rod, and the shape of the part, matched with the swing rod, of the driving shaft is matched with the special-shaped hole.

Furthermore, at least two first through holes are formed in the box body, a second through hole is formed in each transmission gear, and each first through hole and the corresponding second through hole are coaxially arranged.

Further, the box body comprises a first box body and a second box body, wherein a clamping groove is formed in one of the first box body and the second box body, a clamping hook is formed in the other one of the first box body and the second box body, and the clamping hook is clamped into the clamping groove.

Further, the box body assembly comprises at least one positioning column supported between the first box body and the second box body, one of the first box body and the second box body is fixedly connected with one end of the positioning column, at least one blind hole is formed in the other of the first box body and the second box body, and the end part of the positioning column extends into the corresponding blind hole.

A second aspect of the embodiment of the present application provides a household appliance, including a first door body, a second door body, a main housing, and a door opening driving mechanism in the above-mentioned technical solutions, where the first door body is fastened and connected to a connection position of one of the transmission assemblies, and the second door body is fastened and connected to a connection position of another one of the transmission assemblies; the main casing body is provided with an air outlet, and the transmission assembly drives the first door body and the second door body to cover the air outlet and avoid the air outlet for switching.

A third aspect of the embodiment of the present application provides a household appliance, including a first door body, a second door body, a main housing, and a door opening driving mechanism in the foregoing technical solutions, where the first door body is fastened and connected to a connection position of one of the transmission assemblies, and the second door body is fastened and connected to a connection position of another one of the transmission assemblies; the main casing body is provided with an air outlet, and the transmission assembly drives the first door body and the second door body to cover the air outlet and avoid the air outlet for switching.

Further, be formed with on the main casing body towards the backstop muscle that the box body subassembly extends, the box body subassembly including set up in the protruding muscle of box body surface, so the horizontal one side of protruding muscle with the horizontal one side butt of backstop muscle.

Further, the box body assembly comprises a first mounting part protruding out of the top of the box body, and the first mounting part is fixedly connected with the main shell; and/or, the box body assembly comprises a second mounting part protruding out of the bottom of the box body, and the second mounting part is fixedly connected with the main shell.

Further, the door opening driving mechanism is arranged at the top of the main shell.

The actuating mechanism that opens door of this application embodiment can drive multiunit transmission assembly simultaneously through a drive gear and move and then drive the door body and open or close, therefore makes the actuating mechanism that opens door of this application embodiment compact structure, and the external dimension can be done comparatively small and exquisite, is particularly useful for the less domestic appliance of size, for example the column room heater, because the size of column room heater itself is less, and inside installation space is narrower, consequently, needs the less actuating mechanism that opens door of installation size.

Drawings

Fig. 1 is a schematic structural diagram of a door opening driving mechanism according to an embodiment of the present application;

FIG. 2 is a schematic structural view of the structure shown in FIG. 1 without the second box;

FIG. 3 is a schematic structural view of the structure shown in FIG. 1 without a swing link;

FIG. 4 is an exploded view of the structure shown in FIG. 3;

FIG. 5 is a schematic structural view of the structure of FIG. 3 with the second container omitted;

fig. 6 is a schematic partial structural diagram of a household appliance according to an embodiment of the present application;

FIG. 7 is an exploded view of the structure shown in FIG. 6;

FIG. 8 is a schematic view from another perspective of the structure shown in FIG. 7;

fig. 9 is a partially enlarged schematic view of a portion a of fig. 8.

Description of the reference numerals

A door opening drive mechanism 1; a transmission assembly 11; a sector gear 111; a first positioning surface 111 a; a second positioning surface 111 b; shaped teeth 1110; a second through hole 111 c; a swing link 112; a cartridge assembly 12; the accommodation chamber 12 a; a first through hole 12 b; a cartridge body 120; a first case 121; a hook 1210; a second container 122; card slot 122 a; a blind hole 122 b; a positioning post 123; a rib 124; a first protrusion 1211; a second projection 1212; a drive gear 13; a stopper portion 14; a first mounting portion 125; a second mounting portion 126; a motor 17; a power section 171; a power shaft 172; a drive shaft 18; a main housing 2; an air outlet 2 a; a stopper rib 21; a stud 22; a first door body 31; second door body 32

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the present application, the "up," "down," "top" and "bottom" orientations or positional relationships are based on the orientations or positional relationships shown in fig. 6, it being understood that these orientation terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Referring to fig. 6 to 8, the household appliance includes a first door 31, a second door 32, and a door opening driving mechanism 1, and the door opening driving mechanism 1 drives the first door 31 and the second door 32 to move synchronously. It is understood that more door bodies may be included, such as a third door body, a fourth door body, etc. The present application describes a home appliance including two door bodies as an example.

The household appliance may be a cabinet air conditioner, or may be a column heater, a tower fan, or the like, which is not limited herein.

Referring to fig. 1 and 2, the door opening driving mechanism 1 includes a limiting portion 14 (see fig. 5), a driving gear 13, and at least two sets of transmission assemblies 11, each set of transmission assembly 11 has a connection position for connecting with a door body, specifically, one connection position is fastened to the first door body 31, and the other connection position is fastened to the second door body 32; the driving gear 13 is in driving connection with at least one group of transmission assemblies 11 so as to drive the connection positions of at least two groups of transmission assemblies 11 to move towards the directions of approaching to each other or moving away from each other; the limiting portion 14 is in stop contact with the transmission assembly 11 to limit the movement amplitude of the transmission assembly 11.

The door opening driving mechanism of the embodiment of the application can simultaneously drive all the transmission assemblies 11 to move through one driving gear 13 so as to drive the corresponding door bodies to be opened or closed. It should be noted that the number of the door bodies corresponds to the number of the transmission assemblies 11 one to one, and in the embodiment of the present application, the number of the transmission assemblies 11 and the number of the door bodies are described as two examples, that is, two sets of transmission assemblies 11 drive the first door body 31 and the second door body 32 to be opened or closed, specifically, when two connection positions move toward a direction in which the two connection positions are close to each other, the door opening driving mechanism drives the first door body 31 and the second door body 32 to be closed, and when the two connection positions move toward a direction in which the two connection positions are away from each other, the door opening driving mechanism drives the first door body 31 and the second door body 32 to be opened. The actuating mechanism that opens door of this application embodiment, simple structure, compactness, actuating mechanism that opens door's external dimension can be made more small and exquisite, is particularly useful for the less domestic appliance of size, for example the column room heater, because the size of column room heater itself is less, and inside installation space is narrower, consequently, needs the less actuating mechanism 1 that opens door of installation size.

Each group of transmission components 11 comprises a transmission gear and a swing rod 112, one end of the swing rod 112 is coaxially connected with the transmission gear, namely, one end of the swing rod 112 is positioned at one axial side of the transmission gear, and the transmission gear drives the swing rod 112 to move synchronously; the transmission gears in the at least two groups of transmission assemblies 11 are in meshing transmission; the transmission gear of at least one group of transmission assemblies 11 is a sector gear 111, and referring to fig. 4, the sector gear 111 includes a first positioning surface 111a located at the head end of the rotation direction and a second positioning surface 111b located at the tail end of the rotation direction.

The position-limiting portion 14 can selectively come into stop contact with the first positioning surface 111a or the second positioning surface 111b, that is, the position-limiting portion 14 does not simultaneously come into contact with the first positioning surface 111a and the second positioning surface 111 b. When the driving gear 13 rotates in the counterclockwise direction in fig. 5, the sector gear 111 rotates to the first limit position, the first positioning surface 111a contacts with the limit portion 14 in a stopping manner, and the sector gear 111 stops rotating; when the driving gear 13 rotates clockwise in fig. 5, the sector gear 111 rotates to the second limit position, the second positioning surface 111b contacts with the limit portion 14 in a stop manner, the sector gear 111 stops rotating, and the limit portion 14 limits the rotation angle of the sector gear 111.

According to the door opening driving mechanism 1 of the embodiment of the application, under the condition that the swing rod 112 swings at the same angle, the sector gear 111 occupies a smaller space than the circular gear, so that the structure of the door opening driving mechanism can be more compact.

In the embodiment of the present application, the transmission gear of each group of transmission assemblies 11 is the sector gear 111, so that the door opening driving mechanism 1 can be further compact in structure and smaller in appearance size.

In the embodiment of the present application, please refer to fig. 1 and 3, the door opening driving mechanism 1 further includes a box assembly 12, the box assembly 12 includes a box body 120, the box body 120 is formed with a hollow accommodating cavity 12a (refer to fig. 2), the transmission gear and the driving gear 13 are disposed in the accommodating cavity 12a, the box assembly 12 provides a mounting position and a mounting space for the transmission gear and the driving gear 13, the door opening driving mechanism 1 can be mounted inside the household appliance through the box body assembly 12, and the door opening driving mechanism 1 is integrally modularized and is convenient to produce and assemble.

The sector gear 111 has an outer dimension that is substantially sector-shaped, that is, not a full circle. The fan-shaped end to end along the direction of rotation all is formed with the section, and this section can form the locating surface. For example, referring to fig. 4, the first positioning surface 111a extends along a radial direction of the sector gear 111, and the second positioning surface 111b extends along the radial direction of the sector gear 111, so that the sector gear 111 has a neat and beautiful appearance. In the embodiment of the present application, the central angle corresponding to the interval between the first positioning surface 111a and the second positioning surface 111b is greater than 180 °, so that the occupied space of the sector gear 111 is smaller, specifically, the size of the box assembly 12 in the line direction along the centers of the two sector gears 111 can be slightly larger than the sum of the radii of the two sector gears 111, and the external dimension of the box assembly 12 can be reduced to a greater extent.

In one embodiment, in the assembly process of the door opening driving mechanism, please refer to fig. 5, in order to prevent the two adjacent engaged sector gears 111 from being assembled with a staggered tooth, the edge of at least one sector gear 111 along the rotation direction is provided with a special-shaped tooth 1110, and in the case of normal assembly, i.e. in the case of no assembly with a staggered tooth, the special-shaped tooth 1110 does not affect the engagement transmission of the two sector gears 111; when the wrong tooth assembly appears, the special-shaped teeth 1110 can not be meshed with other normal teeth, so that the two sector gears 111 can not be meshed for transmission, the phenomenon of blocking is generated, an operator can try to stir the two sector gears 111 on the assembly site to realize meshing transmission, and if the phenomenon of blocking is found, the assembly error can be found in time, and the correction is facilitated in time.

It should be noted that the edge of one end in the rotation direction may be provided with the special-shaped teeth 1110, or the edges of both ends may be provided with the special-shaped teeth 1110.

In one embodiment, during the assembly process of the door opening driving mechanism, in order to prevent the two meshed transmission gears from being assembled in a staggered manner, at least two first through holes 12b are formed in the box body assembly 12, a second through hole 111c is formed in each transmission gear, and each first through hole 12b is coaxially arranged with the corresponding second through hole 111 c. During assembly, a positioning shaft (not shown) can be inserted into the first through hole 12b and the second through hole 111c to ensure that the first through hole 12b and the second through hole 111c are coaxially corresponding, and after the coaxial corresponding assembly of the first through hole 12b and the second through hole 111c is finished, the positioning shaft is pulled out, so that the assembly relation of the two transmission gears is correct, and the staggered tooth assembly cannot occur.

It is understood that, in the same embodiment, the above-mentioned first through hole 12b and second through hole 111c, and the above-mentioned shaped teeth 1110 may be provided at the same time, or alternatively.

The position-limiting part 14 may be a column structure protruding from the inner surface of the accommodating cavity 12a, or may be a sidewall of the box body 120 itself. For example, in the embodiment of the present application, please refer to fig. 5, the limiting portion 14 is formed as a sidewall corresponding to the box body 120. When the sector gear 111 rotates until the first positioning surface 111a contacts with a part of the side wall of the box body 120, the part of the side wall of the box body 120 contacts with the first positioning surface 111a in a stopping manner, so that the sector gear 111 is prevented from rotating continuously; when the sector gear 111 rotates in the opposite direction until the second positioning surface 111b contacts with another portion of the sidewall of the box body 120, the other portion of the sidewall of the box body 120 contacts with the second positioning surface 111b in a stopping manner, so that the sector gear 111 is prevented from rotating further. In the embodiment of the application, the side wall of the box body 120 itself forms the limiting part 14, and other additional limiting structures are not needed to be added, so that the structure of the door opening driving mechanism 1 can be simplified; furthermore, the outline shape of the side wall of the box body 120 is approximately fit with the rotation limit position of the sector gear 111, and the structure of the door opening driving mechanism 1 can be more compact due to the profile design.

In an embodiment, referring to fig. 5, a first protrusion 1211 extending toward the first positioning surface 111a is formed on a corresponding side wall of the case body 120, the first protrusion 1211 is disposed corresponding to the first positioning surface 111a, the first protrusion 1211 can firmly stop the first positioning surface 111a, and when the sector gear 111 rotates until the first positioning surface 111a contacts the first protrusion 1211 in a stopping manner, an acting force applied by the sector gear 111 to the first protrusion 1211 is along an extending direction of the first protrusion 1211, so that the first protrusion 1211 is not subjected to a lateral acting force perpendicular to the extending direction, and a force condition of the first protrusion 1211 is better; and the first protrusion 1211 can also reinforce the structural strength of the case body 120.

In an embodiment, referring to fig. 4, a second protrusion 1212 extending toward the second positioning surface 111b is formed on a corresponding side wall of the box body 120, the second protrusion 1212 is disposed corresponding to the second positioning surface 111b, the second protrusion 1212 can stably stop the second positioning surface 111b, and when the sector gear 111 rotates until the second positioning surface 111b contacts the second protrusion 1212 in a stopping manner, the acting force applied by the sector gear 111 to the second protrusion 1212 is along the extending direction of the second protrusion 1212, so that the second protrusion 1212 does not receive a lateral acting force perpendicular to the extending direction, and the force receiving condition of the second protrusion 1212 is better; and the second protrusion 1212 also can reinforce the structural strength of the cartridge body 120.

For example, referring to fig. 4, the box body 120 includes a first box 121 and a second box 122, the first box 121 and the second box 122 are connected in a snap-fit manner, and the first box 121 and the second box 122 jointly enclose the accommodating cavity 12 a. Illustratively, one of the first casing 121 and the second casing 122 is formed with a card slot 122a, and the other is formed with a card hook 1210, and the card hook 1210 is clipped into the card slot 122a to detachably connect the first casing 121 and the second casing 122. Through the connection of the hook 1210 and the slot 122a, the first box 121 and the second box 122 are detachably connected into a whole without structural deformation, and structural deformation of the box body 120 caused by screw and bolt connection is avoided. If the structure of the cartridge body 120 is deformed, the transmission gear is easily stuck.

It is understood that the transmission gear and the driving gear 13 may be installed in the first casing 121 or in the second casing 122. In this embodiment, the transmission gear and the driving gear 13 are installed on the first box 121, specifically, during assembly, after the transmission gear and the driving gear 13 are installed in place in the first box 121, the second box 122 is covered on the first box 121, and the hook 1210 is clamped into the clamping groove 122 a.

Further, in order to enhance the structural strength of the first box 121 and the second box 122, referring to fig. 4 and 5, the box assembly 12 further includes at least one positioning post 123 supported between the first box 121 and the second box 122. Specifically, one of the first box 121 and the second box 122 is fixedly connected with one end of the positioning column 123, for example, integrally formed; at least one blind hole 122b is formed in the other of the first box 121 and the second box 122, and the end of the positioning post 123 extends into the blind hole 122 b. The positioning column 123 is supported between the first box 121 and the second box 122, which can increase the structural strength of the box body 120 and prevent the box body 120 from sinking inwards in the process of being extruded by external force.

In order to facilitate the connection between the swing link 112 and the transmission gear, referring to fig. 4, the transmission assembly 11 further includes a driving shaft 18, and both the transmission gear and the swing link 112 are sleeved on the driving shaft 18, it is understood that the driving shaft 18 and the transmission gear may be integrally formed, for example, as an integrally formed injection molding. Furthermore, a special-shaped hole is formed in the swing rod 112, and the shape of the part, matched with the swing rod 112, of the driving shaft 18 is matched with the special-shaped hole, so that the swing rod 112 and the driving shaft 18 can be in driving connection without using fasteners such as screws and the like, and the structure is simple and reliable.

It should be noted that the irregular hole refers to a non-circular hole.

The drive gear 13 may be driven manually or electrically. For example, referring to fig. 4, in the embodiment of the present application, the door opening driving mechanism 1 further includes a motor 17, the motor 17 includes a power portion 171 and a power shaft 172, and the driving gear 13 is tightly sleeved on the power shaft 172. In order to reduce the size of the assembly 12 as much as possible, the power unit 171 is disposed outside the case body 120, and the power shaft 172 extends from the outside of the case body 120 to the inside of the case body 120. Thus, the power portion 171 does not occupy the space of the housing chamber 12a, and the cartridge assembly 12 can be reduced in size.

For example, referring to fig. 1 and fig. 2, the swing link 112 is a bent arm structure, the swing link 112 bends toward a direction away from another swing link 112, and the bent arm structure can avoid interference of other structures within a certain range during the swing of the swing link 112.

Referring to fig. 6, the connection relationship between the door opening driving mechanism 1 according to the embodiment of the present application and the first door 31 and the second door 32 is as follows: the first door body 31 is fixedly connected with one end of one swing rod 112 far away from the transmission gear, that is, there is no relative movement between the first door body 31 and the corresponding swing rod 112, the second door body 32 is fixedly connected with one end of the other swing rod 112 far away from the transmission gear, that is, there is no relative movement between the second door body 32 and the corresponding swing rod 112, and the swing rod 112 drives the double-door synchronous movement.

In an embodiment, referring to fig. 7, an air outlet 2a is formed on the main housing 2, the first door 31 and the second door 32 are disposed at the air outlet 2a, and the door opening driving mechanism 1 drives the first door 31 and the second door 32 to switch between covering the air outlet 2a and avoiding the air outlet 2 a.

Taking a household appliance as an example of a column type heater, when warm air needs to be blown out, the first door body 31 and the second door body 32 move in opposite directions to move to two opposite sides of the air outlet 2a to avoid the air outlet 2a, so that the warm air is blown out from the air outlet 2 a; when the column heater does not need to work, the first door body 31 and the second door body 32 move oppositely until the first door body 31 and the second door body 32 are butted to cover the air outlet 2a, so that the appearance of the column heater is neat and attractive.

Illustratively, the door opening drive mechanism 1 is provided at the top of the main casing 2. The top of the main housing 2 has a relatively large installation space and also facilitates the assembling operation.

In order to facilitate the installation of the side-by-side door driving mechanism 1, a stop rib 21 extending towards the box assembly 12 and used for positioning the side-by-side door driving mechanism is formed on the main casing 2, the box assembly 12 comprises a convex rib 124 arranged on the outer surface of the box body 12, and one transverse side of the convex rib 124 is abutted against one transverse side of the stop rib 21. During assembly, the rib 124 is first abutted against the stopper rib 21, so that the relative position of the door opening drive mechanism 1 and the main housing 2 can be quickly and accurately positioned.

It should be noted that the "transverse direction" refers to a direction substantially perpendicular to the extending direction of the rib 124.

Illustratively, in one embodiment, to facilitate the installation of the door opening driving mechanism 1, the cartridge assembly 12 includes a first mounting portion 125 protruding from the top of the cartridge body 120, and the first mounting portion 125 is fastened to the main housing 2; and/or the cartridge assembly 12 includes a second mounting portion 126 protruding from the bottom of the cartridge assembly 12, and the second mounting portion 126 is fastened to the main housing 2, for example, screwed to the stud 22 provided on the main housing 2.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims (18)

1. Domestic appliance's actuating mechanism that opens door, its characterized in that includes:

at least two groups of transmission assemblies (11), wherein each group of transmission assemblies (11) is provided with a connecting position for connecting with a door body;

the driving gear (13) is in driving connection with at least one group of transmission assemblies (11) so as to drive the connection positions of the at least two groups of transmission assemblies to move towards directions close to or away from each other;

the limiting part (14), the limiting part (14) and the transmission component (11) are in stop contact.

2. The door opening driving mechanism according to claim 1, characterized in that each set of said transmission components (11) comprises a transmission gear and a swing link (112), one end of said swing link (112) is coaxially connected with said transmission gear, said connection position is located at one end of said swing link (112) far away from said transmission gear, said transmission gears of said at least two sets of said transmission components (11) are in mesh transmission; at least one group of transmission gears of the transmission assembly (11) is a sector gear (111), and the sector gear (111) comprises a first positioning surface (111a) and a second positioning surface (111b) which are arranged at intervals along the rotation direction; the limiting part (14) can be selectively contacted with the first positioning surface (111a) or the second positioning surface (111b) in a stopping way.

3. The door opening drive mechanism according to claim 2, characterized in that the number of the transmission assemblies (11) is two, and the transmission gear of each transmission assembly (11) is a sector gear (111).

4. The door opening drive mechanism according to claim 2, wherein the first positioning surface (111a) extends in a radial direction of the sector gear (111), the second positioning surface (111b) extends in a radial direction of the sector gear (111), and a central angle corresponding to a space between the first positioning surface (111a) and the second positioning surface (111b) is greater than 180 °.

5. The door opening drive mechanism according to claim 3, characterized in that the edges of the sector gear (111) in the direction of rotation are provided with shaped teeth (1110), the shaped teeth (1110) of the sector gears (111) in both sets of the transmission assembly (11) fitting.

6. The door opening driving mechanism according to any one of claims 2 to 5, characterized in that the door opening driving mechanism comprises a cartridge assembly (12), the cartridge assembly (12) comprises a cartridge body (120), the cartridge body (120) is formed with a hollow accommodating chamber (12a), and the transmission gear and the driving gear (13) are located in the accommodating chamber (12 a).

7. The door opening drive mechanism according to claim 6, characterized in that the stopper (14) is formed as a corresponding side wall of the box body (120).

8. The door opening driving mechanism according to claim 7, wherein a first protrusion (1211) extending toward the first positioning surface (111a) is formed on a corresponding side wall of the box body (120), and the first protrusion (1211) is disposed corresponding to the first positioning surface (111 a); and/or a second protrusion (1212) extending towards the second positioning surface (111b) is formed on a corresponding side wall of the accommodating cavity (12a), and the second protrusion (1212) is arranged corresponding to the second positioning surface (111 b).

9. The door opening driving mechanism according to claim 6, characterized in that the transmission assembly (11) comprises a driving shaft (18), the transmission gear and the swing link (112) are fixedly sleeved on the driving shaft (18), one end of the driving shaft (18) protrudes out of the box body (120), and the swing link (112) is connected to the portion of the driving shaft (18) located outside the box body (120).

10. The door opening drive mechanism according to claim 9, characterized in that the rocker (112) is formed with a profiled hole, the shape of the portion of the drive shaft (18) cooperating with the rocker (112) being adapted to the profiled hole.

11. The door opening driving mechanism according to claim 6, wherein at least two first through holes (12b) are formed in the case body (120), a second through hole (111c) is formed in each of the transmission gears, and each of the first through holes (12b) is coaxially disposed with the corresponding second through hole (111 c).

12. The door opening driving mechanism according to claim 6, wherein the case body (120) includes a first case (121) and a second case (122), one of the first case (121) and the second case (122) is formed with a catching groove (122a), and the other is formed with a catching hook (1210), and the catching hook (1210) is caught in the catching groove (122 a).

13. The door opening driving mechanism according to claim 12, wherein the box assembly (12) includes at least one positioning post (123) supported between the first box (121) and the second box (122), one of the first box (121) and the second box (122) is fixedly connected to one end of the positioning post (123), the other of the first box (121) and the second box (122) is formed with at least one blind hole (122b), and an end of the positioning post (123) extends into the corresponding blind hole (122 b).

14. The household appliance is characterized by comprising a first door body (31), a second door body (32), a main shell (2) and the door opening driving mechanism of any one of claims 1 to 5, wherein the first door body (31) is fixedly connected with the connecting position of one of the transmission assemblies (11), and the second door body (32) is fixedly connected with the connecting position of the other of the transmission assemblies (11); the main shell (2) is provided with an air outlet (2a), and the transmission assembly (11) drives the first door body (31) and the second door body (32) to switch between covering the air outlet (2a) and avoiding the air outlet (2 a).

15. The household appliance is characterized by comprising a first door body (31), a second door body (32), a main shell (2) and the door opening driving mechanism of any one of claims 6 to 13, wherein the first door body (31) is fixedly connected with the connecting position of one of the transmission assemblies (11), and the second door body (32) is fixedly connected with the connecting position of the other of the transmission assemblies (11); the main shell (2) is provided with an air outlet (2a), and the transmission assembly (11) drives the first door body (31) and the second door body (32) to switch between covering the air outlet (2a) and avoiding the air outlet (2 a).

16. The household appliance according to claim 15, wherein the main housing (2) is formed with a stopper rib (21) extending toward the case assembly (12), and the case assembly (12) includes a rib (124) provided on an outer surface of the case body (120), so that a lateral side of the rib (124) abuts against a lateral side of the stopper rib (21).

17. The household appliance according to claim 15, wherein the box assembly (12) comprises a first mounting portion (125) protruding from the top of the box body (120), the first mounting portion (125) being fastened to the main housing (2); and/or the box body assembly (12) comprises a second mounting part (126) protruding out of the bottom of the box body (120), and the second mounting part (126) is fixedly connected with the main shell (2).

18. The household appliance according to claim 15, wherein the door opening drive mechanism is provided at the top of the main housing (2).

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