Door switch mechanism and household appliance

Abstract

The present invention relates to the technical field of household appliances, and in particular to a door opening and closing mechanism and household appliances. The door opening and closing mechanism comprises: a push rod connected to the door body and capable of driving the door body to rotate; a driving mechanism providing power for the push rod to drive the door body to rotate; and a manual-automatic converter connected to the push rod and the driving mechanism, respectively. The manual-automatic converter can move linearly with the push rod to realize the conversion of the push rod between manual and automatic opening and closing of the door body. The door opening and closing mechanism provided in the present invention can realize automatic or manual opening and closing of the door body according to user needs because the manual-automatic converter is directly connected to the push rod. Manual opening and closing and automatic opening and closing can be freely switched without the user performing other operations, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a door switch mechanism and a household appliance. Background Art

[0002] In existing oven technology, ovens require manual operation to cook food. During operation, the operator manually opens the oven door and places food inside. After baking, the operator must manually open the oven door and remove the food. This operation poses the risk of burns from the hot oven door. To address this issue, ovens with automatic door opening have been proposed. However, these ovens suffer from the problem of being unable to manually open and close the oven door during a power outage.

[0003] Therefore, it is necessary to propose a household appliance that can solve the problem that the existing door body cannot be manually opened and closed after a power outage. Summary of the Invention

[0004] The purpose of the present invention is to provide a door opening and closing mechanism and a household appliance, which can realize the dual functions of manual opening and closing and automatic opening and closing of the door.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Provided is a door opening and closing mechanism, comprising:

[0007] Push rod, connected to the door body, can drive the door body to rotate;

[0008] A driving mechanism provides power for the push rod to drive the door body to rotate;

[0009] The manual-automatic converter is connected to the push rod and the driving mechanism respectively. The manual-automatic converter can move linearly with the push rod to realize the conversion of the push rod between manual and automatic opening and closing of the door body.

[0010] Preferably, the manual-automatic converter is a sliding arm, and the sliding arm is slidably connected to the push rod.

[0011] Preferably, a sliding hole is provided on the sliding arm, and the sliding arm is connected to the push rod through the sliding hole and can slide along the direction in which the sliding hole extends.

[0012] Preferably, the sliding hole is a rectangular hole or a waist-shaped hole.

[0013] Preferably, the driving mechanism includes a power source, a transmission assembly and a slider, the power source drives the slider to move linearly through the transmission assembly, and the slider is connected to the sliding arm.

[0014] Preferably, the power source is a motor, and the transmission assembly is a screw nut, a rack and pinion assembly, or a worm gear assembly.

[0015] Preferably, a reducer is further provided between the motor and the transmission assembly.

[0016] Preferably, the door opening and closing mechanism further comprises a door fixing tongue, one end of which is rotationally connected to the push rod and the other end is fixedly connected to the door body.

[0017] The present invention also provides a household appliance, comprising a housing and a door, wherein the door is rotatably arranged on the housing, and further comprising the above-mentioned door switch mechanism, wherein the door switch mechanism is arranged in the housing and can open and close the door automatically or manually.

[0018] Preferably, it also includes a box body locking part and a door body fixing tongue, one end of the door body fixing tongue is rotationally connected to the push rod and the box body, and the other end is fixedly connected to the door body, and the end of the door body fixing tongue connected to the box body is also provided with a door body locking part, and the box body locking part is provided on the box body, and the door body locking part and the box body locking part can be interlocked.

[0019] Beneficial effects of the present invention:

[0020] The door opening and closing mechanism provided in the present invention can realize automatic or manual opening and closing of the door according to user needs because the manual-automatic converter is directly connected to the push rod. Manual opening and closing and automatic opening and closing can be freely switched without the user performing other operations, thereby improving the user experience.

[0021] The household appliance provided by the present invention can realize manual opening and closing of the door body when the power is off, and automatic opening and closing of the door body when the power is on. The manual-automatic converter can realize free switching between manual opening and closing of the door body and automatic opening and closing of the door body without the assistance of other structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the principle of the door opening and closing mechanism of a household appliance provided by an embodiment of the present invention;

[0023] Figure 2 1 is a schematic structural diagram of a door switch mechanism of a household appliance provided by an embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of the unlocking of the door locking portion and the box locking portion provided by an embodiment of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the interlocking of the door locking portion and the box body locking portion provided by an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Push rod; 2. Driving mechanism; 21. Motor; 22. Screw nut; 23. Slider; 3. Sliding arm; 31. Sliding hole; 4. Speed reducer; 5. Door fixing tongue; 51. Door locking part; 6. Box locking part; 7. Pivot. DETAILED DESCRIPTION

[0028] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] Example 1

[0032] like Figure 1 and Figure 2 As shown, a door opening and closing mechanism is provided in this embodiment, which includes a driving mechanism 2, a push rod and a manual-automatic converter. The push rod 1 is connected to the door body and can drive the door body to rotate; the driving mechanism 2 provides power for the push rod 1 to drive the door body to rotate, and the manual-automatic converter is connected to the push rod 1 and the driving mechanism 2 respectively, which can realize the conversion of the push rod 1 between manual and automatic opening and closing of the door body.

[0033] The door opening and closing mechanism provided in this embodiment can realize automatic or manual opening and closing of the door, and can realize opening and closing of the door according to user needs. It can realize switching between manual opening and closing and automatic opening and closing without the user performing other operations, thereby improving the user experience.

[0034] The manual rotator can realize the purpose of manually or automatically closing the door when it is in working state. When the household appliance is in power-off state, the user can manually open and close it. At the same time, when the household appliance is powered on, the user can also manually open and close it. The door opening and closing mechanism only requires the user to push and pull the door body to realize manual opening and closing of the door, without the user performing other operations. The user can choose to open and close the door body according to his needs.

[0035] Since the manual-automatic converter plays the role of pushing and pulling the push rod 1 in the automatic opening and closing action of the door body, there is no need to set up a separate structure for manual opening and closing of the door in this embodiment, so that the household appliance structure provided in this embodiment is relatively simple, and can realize the rapid switching action between automatic opening and closing of the door body and manual opening and closing of the door body.

[0036] The manual-automatic converter comprises a sliding arm 3, which is slidably connected to the push rod 1. Specifically, the sliding arm 3 is provided with a sliding hole 31, through which the sliding arm 3 and the push rod 1 are connected and can slide along the direction in which the sliding hole 31 extends. The push rod 1 and the sliding arm 3 are connected by a pivot 7, which is specifically disposed within the sliding hole 31 and can move back and forth within the sliding hole 31, ensuring that the sliding hole 31 can quickly switch between automatic and manual opening and closing of the door. Preferably, in this embodiment, the sliding hole 31 is a rectangular hole. Of course, in other embodiments, the sliding hole 31 can also be a waist-shaped hole.

[0037] The driving mechanism includes a power source 21 , a transmission assembly and a slider 23 , wherein the power source 21 drives the slider 23 to move linearly through the transmission assembly, and the slider 23 is connected to the sliding arm 3 .

[0038] like Figure 1 and 2 As shown, the power source is a motor. In this embodiment, the transmission assembly includes a screw nut 22. The forward and reverse rotation of the motor can realize the screw driving the nut to move back and forth linearly. The nut is fixedly connected to the slider 23, which enables the slider to move linearly with the nut. The slider 23 is fixedly connected to the sliding arm 3, which can drive the sliding arm 3 to move linearly. The sliding hole 31 is set on the sliding arm 3. When the sliding arm 3 moves linearly, it can push and pull the push rod 1 to move linearly. In order to prevent the motor from rotating too fast and causing damage to the door body due to large movement amplitude, a speed reducer 4 is also provided between the motor and the transmission assembly in this embodiment.

[0039] Of course, pressure sensors can also be installed at both ends of the sliding hole 31, and the pressure sensors are used to determine whether the pivot 7 is located on either side of the sliding hole 31. According to the specific position of the pivot 7, the controller controls the motor to rotate forward and reverse.

[0040] More specifically, the door opening and closing mechanism further comprises a door fixing tongue 5 fixedly arranged on the door body, and the door fixing tongue 5 is rotatably connected to the push rod 1, so that the push rod 1 can drive the door to be opened and closed.

[0041] This embodiment also provides a household appliance, which includes a housing and a door, wherein the door is rotatably mounted on the housing. The household appliance also includes a door switch mechanism, which is disposed within the housing and enables the door to be opened and closed automatically or manually. Because one end of a door fixing tongue 5 is rotatably connected to a push rod 1 and the other end is fixedly connected to the door, the push rod 1 must also ensure that the door is fixed in an open position. This action causes the push rod 1 to be subjected to a pulling force from the door, resulting in an increase in motor torque. To reduce the motor torque, in this embodiment, the door fixing tongue 5 is also rotatably connected to the housing.

[0042] The household appliance provided in this embodiment can realize manual opening and closing of the door body when the power is off, and automatic opening and closing of the door body when the power is on. The manual-automatic converter can realize free switching between manual opening and closing of the door body and automatic opening and closing of the door body without the assistance of other structures.

[0043] After the door is closed, in order to keep the door closed, it is necessary to keep the door and the box body absolutely vertical. However, due to the errors in manufacturing and installation in the prior art, the door body is often tilted and opened automatically by gravity, and the opening is achieved when the motor is not working. To solve the above problem, in this embodiment, a door locking part 51 is provided at one end of the door fixing tongue 5 connected to the box body, and a box body locking part 6 is provided on the box body. The door locking part 51 and the box body locking part 6 are interlocked (refer to Figures 3 and Figure 4 ), to ensure the stability of the door body in the closed state, a balance spring is provided on the box body locking portion 6 to ensure the interlocking between the door body locking portion 51 and the box body locking portion 6. Preferably, the door body locking portion 51 and the box body locking portion 6 are both cam structures.

[0044] In this embodiment, the household appliance is an oven or a microwave oven.

[0045] The following is based on Figure 1 , specifically describe the working process of the household appliance when opening and closing the door:

[0046] In the initial state, the door is closed. After the motor receives the door opening command, it drives the lead screw to rotate. The nut 22 on the lead screw drives the slider 23 and the sliding arm 3 to move linearly. Since the pivot 7 is located at the left end of the sliding hole 31, when the sliding arm moves to the right, it pushes the push rod 1 to move to the right, thereby achieving the purpose of the push rod 1 pushing the door. When the door is pushed open, the motor reverses and the pivot 7 is located at the right end of the sliding hole 31, which facilitates the rotation of the motor to close the door. At the same time, it can also ensure that after the door is opened, the door can be manually closed in the event of a power outage.

[0047] Example 2

[0048] like Figure 1 and Figure 2 As shown, a door opening and closing mechanism is provided in this embodiment, which includes a driving mechanism 2, a push rod and a manual-automatic converter. The push rod 1 is connected to the door body and can drive the door body to rotate; the driving mechanism 2 provides power for the push rod 1 to drive the door body to rotate, and the manual-automatic converter is connected to the push rod 1 and the driving mechanism 2 respectively, which can realize the conversion of the push rod 1 between manual and automatic opening and closing of the door body.

[0049] The door opening and closing mechanism provided in this embodiment can realize automatic or manual opening and closing of the door, and can realize opening and closing of the door according to user needs. It can realize switching between manual opening and closing and automatic opening and closing without the user performing other operations, thereby improving the user experience.

[0050] The manual rotator can realize the purpose of manually or automatically closing the door when it is in working state. When the household appliance is in power-off state, the user can manually open and close it. At the same time, when the household appliance is powered on, the user can also manually open and close it. The door opening and closing mechanism only requires the user to push and pull the door body to realize manual opening and closing of the door, without the user performing other operations. The user can choose to open and close the door body according to his needs.

[0051] Since the manual-automatic converter plays the role of pushing and pulling the push rod 1 in the automatic opening and closing action of the door body, there is no need to set up a separate structure for manual opening and closing of the door in this embodiment, so that the household appliance structure provided in this embodiment is relatively simple, and can realize the rapid switching action between automatic opening and closing of the door body and manual opening and closing of the door body.

[0052] The manual-automatic converter comprises a sliding arm 3, which is slidably connected to the push rod 1. Specifically, the sliding arm 3 is provided with a sliding hole 31, through which the sliding arm 3 and the push rod 1 are connected and can slide along the direction in which the sliding hole 31 extends. The push rod 1 and the sliding arm 3 are connected by a pivot 7, which is specifically disposed within the sliding hole 31 and can move back and forth within the sliding hole 31, ensuring that the sliding hole 31 can quickly switch between automatic and manual opening and closing of the door. Preferably, in this embodiment, the sliding hole 31 is a rectangular hole. Of course, in other embodiments, the sliding hole 31 can also be a waist-shaped hole.

[0053] The driving mechanism includes a power source 21 , a transmission assembly and a slider 23 , wherein the power source 21 drives the slider 23 to move linearly through the transmission assembly, and the slider 23 is connected to the sliding arm 3 .

[0054] The above-mentioned power source is a motor, and the transmission assembly is a gear rack assembly, which specifically includes a gear (not shown in the figure) and a rack (not shown in the figure), wherein the gear is meshed with the rack, and the gear is located above or below the rack, and the slider 23 is fixed on the rack, and the slider 23 can move linearly with the rack, and the motor is connected to the gear and drives the gear to rotate. The forward and reverse rotation of the motor can realize the linear reciprocating movement of the rack, and the fixed connection between the rack and the slider 23 can drive the slider 23 to move linearly together, the slider 23 is fixedly connected to the sliding arm 3, and can drive the sliding arm 3 to move linearly, and the sliding hole 31 is set on the sliding arm 3. When the sliding arm 3 moves linearly, it can push and pull the push rod 1 to move linearly. In order to prevent the motor from rotating too fast and causing damage to the door body due to a large amplitude of movement, a speed reducer 4 is also provided between the motor and the transmission assembly in this embodiment.

[0055] Of course, pressure sensors can also be installed at both ends of the sliding hole 31, and the pressure sensors are used to determine whether the pivot 7 is located on either side of the sliding hole 31. According to the specific position of the pivot 7, the controller controls the motor to rotate forward and reverse.

[0056] This embodiment also provides a household appliance, which includes a housing and a door, wherein the door is rotatably mounted on the housing. The household appliance also includes a door switch mechanism, which is disposed within the housing and enables the door to be opened and closed automatically or manually. Because one end of a door fixing tongue 5 is rotatably connected to a push rod 1 and the other end is fixedly connected to the door, the push rod 1 must also ensure that the door is fixed in an open position. This action causes the push rod 1 to be subjected to a pulling force from the door, resulting in an increase in motor torque. To reduce the motor torque, in this embodiment, the door fixing tongue 5 is also rotatably connected to the housing.

[0057] The household appliance provided in this embodiment can realize manual opening and closing of the door body when the power is off, and automatic opening and closing of the door body when the power is on. The manual-automatic converter can realize free switching between manual opening and closing of the door body and automatic opening and closing of the door body without the assistance of other structures.

[0058] After the door is closed, in order to keep the door closed, it is necessary to keep the door and the box body absolutely vertical. However, due to the errors in manufacturing and installation in the prior art, the door body is often tilted and opened automatically by gravity, and the opening is achieved when the motor is not working. To solve the above problem, in this embodiment, a door locking part 51 is provided at one end of the door fixing tongue 5 connected to the box body, and a box body locking part 6 is provided on the box body. The door locking part 51 and the box body locking part 6 are clamped and interlocked (refer to Figure 3 and Figure 4 ), to ensure the stability of the door body in the closed state, a balance spring is provided on the box body locking portion 6 to ensure the interlocking between the door body locking portion 51 and the box body locking portion 6. Preferably, the door body locking portion 51 and the box body locking portion 6 are both cam structures.

[0059] In this embodiment, the household appliance is an oven or a microwave oven.

[0060] The working process in this embodiment is similar to that in embodiment 1 and will not be described in detail here.

[0061] Example 3

[0062] like Figure 1 and Figure 2 As shown, a door opening and closing mechanism is provided in this embodiment, which includes a driving mechanism 2, a push rod and a manual-automatic converter. The push rod 1 is connected to the door body and can drive the door body to rotate; the driving mechanism 2 provides power for the push rod 1 to drive the door body to rotate, and the manual-automatic converter is connected to the push rod 1 and the driving mechanism 2 respectively, which can realize the conversion of the push rod 1 between manual and automatic opening and closing of the door body.

[0063] The door opening and closing mechanism provided in this embodiment can realize automatic or manual opening and closing of the door, and can realize opening and closing of the door according to user needs. It can realize switching between manual opening and closing and automatic opening and closing without the user performing other operations, thereby improving the user experience.

[0064] The manual rotator can realize the purpose of manually or automatically closing the door when it is in working state. When the household appliance is in power-off state, the user can manually open and close it. At the same time, when the household appliance is powered on, the user can also manually open and close it. The door opening and closing mechanism only requires the user to push and pull the door body to realize manual opening and closing of the door, without the user performing other operations. The user can choose to open and close the door body according to his needs.

[0065] Since the manual-automatic converter plays the role of pushing and pulling the push rod 1 in the automatic opening and closing action of the door body, there is no need to set up a separate structure for manual opening and closing of the door in this embodiment, so that the household appliance structure provided in this embodiment is relatively simple, and can realize the rapid switching action between automatic opening and closing of the door body and manual opening and closing of the door body.

[0066] The manual-automatic converter comprises a sliding arm 3, which is slidably connected to the push rod 1. Specifically, the sliding arm 3 is provided with a sliding hole 31, through which the sliding arm 3 and the push rod 1 are connected and can slide along the direction in which the sliding hole 31 extends. The push rod 1 and the sliding arm 3 are connected by a pivot 7, which is specifically disposed within the sliding hole 31 and can move back and forth within the sliding hole 31, ensuring that the sliding hole 31 can quickly switch between automatic and manual opening and closing of the door. Preferably, in this embodiment, the sliding hole 31 is a rectangular hole. Of course, in other embodiments, the sliding hole 31 can also be a waist-shaped hole.

[0067] The driving mechanism includes a power source 21 , a transmission assembly and a slider 23 , wherein the power source 21 drives the slider 23 to move linearly through the transmission assembly, and the slider 23 is connected to the sliding arm 3 .

[0068] The above-mentioned power source is a motor, and the transmission assembly is a worm gear assembly, which specifically includes a turbine (not shown in the figure) and a worm (not shown in the figure), wherein the turbine is engaged with the worm, and the turbine is located above, below, or on either side of the worm, and the slider 23 is fixed on the worm, and the slider 23 can move linearly with the worm, and the motor is connected to the turbine and drives the turbine to rotate. The forward and reverse rotation of the motor can realize the linear reciprocating movement of the worm, and the worm is fixedly connected to the slider 23 to drive the slider 23 to move linearly together, the slider 23 is fixedly connected to the sliding arm 3, and can drive the sliding arm 3 to move linearly, and the sliding hole 31 is set on the sliding arm 3. When the sliding arm 3 moves linearly, it can push and pull the push rod 1 to move linearly. In order to prevent the motor from rotating too fast and causing damage to the door body due to a large amplitude of movement, a reducer 4 is also provided between the motor and the transmission assembly in this embodiment.

[0069] Of course, pressure sensors can also be installed at both ends of the sliding hole 31, and the pressure sensors are used to determine whether the pivot 7 is located on either side of the sliding hole 31. According to the specific position of the pivot 7, the controller controls the motor to rotate forward and reverse.

[0070] This embodiment also provides a household appliance, which includes a housing and a door, wherein the door is rotatably mounted on the housing. The household appliance also includes a door switch mechanism, which is disposed within the housing and enables the door to be opened and closed automatically or manually. Because one end of a door fixing tongue 5 is rotatably connected to a push rod 1 and the other end is fixedly connected to the door, the push rod 1 must also ensure that the door is fixed in an open position. This action causes the push rod 1 to be subjected to a pulling force from the door, resulting in an increase in motor torque. To reduce the motor torque, in this embodiment, the door fixing tongue 5 is also rotatably connected to the housing.

[0071] The household appliance provided in this embodiment can realize manual opening and closing of the door body when the power is off, and automatic opening and closing of the door body when the power is on. The manual-automatic converter can realize free switching between manual opening and closing of the door body and automatic opening and closing of the door body without the assistance of other structures.

[0072] After the door is closed, in order to keep the door closed, it is necessary to keep the door and the box body absolutely vertical. However, due to the errors in manufacturing and installation in the prior art, the door body is often tilted and opened automatically by gravity, and the opening is achieved when the motor is not working. To solve the above problem, in this embodiment, a door locking part 51 is provided at one end of the door fixing tongue 5 connected to the box body, and a box body locking part 6 is provided on the box body. The door locking part 51 and the box body locking part 6 are interlocked (refer to Figures 3 and Figure 4 ), to ensure the stability of the door body in the closed state, a balance spring is provided on the box body locking portion 6 to ensure the interlocking between the door body locking portion 51 and the box body locking portion 6. Preferably, the door body locking portion 51 and the box body locking portion 6 are both cam structures.

[0073] In this embodiment, the household appliance is an oven or a microwave oven.

[0074] The working process in this embodiment is similar to that in embodiment 1 and will not be described in detail here.

[0075] Note that the basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications are intended to fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A door opening and closing method, characterized in that: include: In the initial state, the door body is in a closed state. After the motor receives the door opening instruction, the driving mechanism drives the slider (23) and the sliding arm (3) to move linearly. Since the pivot (7) is located at the left end of the sliding hole (31), when the sliding arm moves to the right, it pushes the push rod (1) to move to the right, thereby achieving the purpose of the push rod (1) pushing the door body. When the door body is pushed open, the motor reverses, and the pivot (7) is located at the right end of the sliding hole (31), which facilitates the rotation of the motor to achieve the action of closing the door body. At the same time, it can also ensure that after the door body is opened, the door body can be manually closed in the case of power failure. The door opening and closing mechanism comprises: A push rod (1) is connected to the door body and can drive the door body to rotate; A driving mechanism (2) provides power for the push rod (1) to drive the door body to rotate, the power source being a motor (21); A manual-automatic converter is connected to the push rod (1) and the drive mechanism (2) respectively, and the manual-automatic converter can move linearly with the push rod to realize the conversion of the push rod (1) between manual and automatic opening and closing of the door body; The manual-automatic converter is a sliding arm (3), and the sliding arm (3) is slidably connected to the push rod (1); A sliding hole (31) is provided on the sliding arm (3), and the sliding arm (3) is connected to the push rod (1) through the sliding hole (31) and can slide along the direction in which the sliding hole (31) extends; The push rod (1) is connected to the sliding arm (3) via a pivot (7), and the pivot (7) is specifically arranged in the sliding hole (31).

2. The door opening and closing method according to claim 1, characterized in that: The sliding hole (31) is a rectangular hole or a waist-shaped hole.

3. The door opening and closing method according to any one of claims 1 to 2, characterized in that: The driving mechanism (2) comprises a power source, a transmission component and a slider, the power source drives the slider to move linearly through the transmission component, and the slider is connected to the sliding arm.

4. The door opening and closing method according to claim 3, characterized in that: The power source is a motor (21), and the transmission assembly is a screw nut (22), a gear rack assembly, or a worm gear assembly.

5. The door opening and closing method according to claim 4, characterized in that: A reducer (4) is also provided between the motor (21) and the transmission assembly.

6. The door opening and closing method according to claim 3, characterized in that: The door body opening and closing mechanism further comprises a door body fixing tongue (5), one end of the door body fixing tongue (5) is rotatably connected to the push rod (1), and the other end is fixedly connected to the door body.

7. A door opening and closing method for a household appliance, comprising a housing and a door, wherein the door is rotatably arranged on the housing, characterized in that: A switching method of a door opening and closing mechanism as described in any one of claims 1 to 5 is also used, wherein the door opening and closing mechanism is arranged in a box body and can open and close the door automatically or manually.

8. The door opening and closing method of a household appliance according to claim 7, characterized in that: It also includes a box body locking portion (6) and a door body fixing tongue (5), one end of the door body fixing tongue is rotatably connected to the push rod (1) and the box body, and the other end is fixedly connected to the door body. The end of the door body fixing tongue (5) connected to the box body is also provided with a door body locking portion (51), the box body locking portion (6) is provided on the box body, and the door body locking portion (51) and the box body locking portion (6) can be interlocked.

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