A household appliance capable of automatically or manually pulling out a cavity

Abstract

The present invention discloses a household appliance that can automatically or manually pull out a cavity, comprising a shell, a cavity, a middle plate, at least one connecting mechanism and a driving mechanism. The middle plate is movably arranged in the shell and is located at the bottom of the cavity. The cavity is detachably connected to the middle plate through the connecting mechanism. The driving mechanism is connected to the middle plate and is used to automatically push the cavity and the middle plate into or out of the shell. When the cavity is manually pulled out or pushed into the shell, it can drive the connecting mechanism to move, thereby making the connecting mechanism detach from the middle plate or making the connecting mechanism and the middle plate engage in a matching manner. The cavity of the present invention has two modes: automatic push-pull and manual push-pull. By adding a middle plate and a connecting mechanism, a simple and reliable switch between the automatic push-pull mode and the manual push-pull mode of the cavity is achieved, and the driving mechanism is not affected when the cavity is manually pushed and pulled, so that the user experience is good.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a household appliance with a cavity that can be automatically or manually pulled out. Background Art

[0002] The coordinated transmission of the gear rack can realize the automatic opening and closing of the dishwasher door and drawer, but it will cause the following problems: when the dishwasher is powered off, it is necessary to manually operate the door and open and close it. In the transmission structure where the motor drives the gear rack, the manual mode is likely to cause excessive transmission force, disrupting the normal operation of the motor shaft and thus damaging the motor. In addition, when the drawer of the drawer-type dishwasher is fully pulled out, the gravity is all concentrated on the front end, resulting in unbalanced force, and the gear is easy to disengage and separate from the rack, resulting in transmission failure. This is also the reason why the gear rack transmission method is not widely used in embedded products. Effectively solving these problems can provide technical support for the switching of manual and automatic modes, promote intelligent development, and provide a stronger user experience. Summary of the invention

[0003] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a household appliance whose cavity can be pulled out automatically or manually. By adding a middle plate and a connecting mechanism, the household appliance achieves simple and reliable switching between automatic push-pull and manual push-pull modes of the cavity.

[0004] According to the household appliance provided above that can automatically or manually pull out the cavity, the household appliance is any one of a dishwasher, a disinfection cabinet, an oven or a steamer, which is achieved by the following technical solution:

[0005] A household appliance with a cavity that can be automatically or manually pulled out comprises a shell with one side open, a cavity movably arranged in the shell, and further comprising a middle plate, at least one connecting mechanism and a driving mechanism. The middle plate is movably arranged in the shell and is located at the bottom of the cavity. The cavity is detachably connected to the middle plate through the connecting mechanism. The driving mechanism is connected to the middle plate and is used to automatically push the cavity and the middle plate into or out of the shell. When the cavity is manually pulled out or pushed into the shell, the connecting mechanism can drive the connecting mechanism to move, thereby causing the connecting mechanism to detach from the middle plate or causing the connecting mechanism to engage with the middle plate.

[0006] In some embodiments, at least one side of the top surface of the middle layer plate is provided with a first downwardly recessed slot and its side wall is provided with a first opening connected to the first slot, the connecting mechanism includes a connecting rod and a roller connected to each other, the end of the connecting rod away from the roller is connected to the outer wall of the cavity, and the end of the roller away from the connecting rod passes through the first opening and is clamped in the first slot; through the connecting rod, the cavity can drive the roller to disengage from the first slot or clamp into the first slot when the shell is manually pulled out or pushed in.

[0007] In some embodiments, a boss parallel to the roller is provided at one end of the connecting rod close to the cavity, and the boss is connected to the outer side of the side wall of the cavity; and the first slot and the first opening are inclined forward.

[0008] In some embodiments, a recessed portion for accommodating the roller is provided at the lower end of the back side of the cavity, and the roller enters into the recessed portion after being separated from the first slot.

[0009] In some embodiments, the top surface of the middle layer board is provided with a second card slot and an installation slot which are recessed downward and located in front of the first card slot, and the side wall of the middle layer board is provided with a second opening which is respectively connected to the first opening and the second card slot, the second card slot is connected to the first card slot, the installation slot is located at the upper end of the second card slot and is connected to the second card slot, and a cover plate flush with the top surface of the middle layer board is provided in the installation slot, and the cover plate is hinged to the middle layer board at one end close to the first card slot.

[0010] In some embodiments, the cross-sections of the first card slot and the second card slot along the movement direction of the cavity form a "U" shape that is inclined forward.

[0011] In some embodiments, a slide groove extending in the front-to-back direction is provided at the bottom of the cavity, and a guide rail corresponding to and matching the slide groove is provided at the top of the middle plate.

[0012] In some embodiments, the driving mechanism includes a driver and a transmission assembly that are connected to each other, and the transmission assembly is cooperatively connected to the middle plate. The driver drives the middle plate to move forward and backward through the transmission assembly, and the movement of the middle plate can drive the cavity to automatically be pushed out or into the shell.

[0013] In some embodiments, the transmission assembly includes a gear and a rack that mesh with each other, the gear is connected to the driver, and the rack extending in the front-to-back direction is provided on the bottom surface of the middle plate.

[0014] In some embodiments, the transmission assembly includes a toothed plate and at least one gear, wherein the toothed plate is connected to the bottom of the middle plate and has a bottom surface provided with a plurality of tooth grooves extending in the front-to-back direction, and the gear is meshed with the tooth grooves and connected to the driver.

[0015] In some embodiments, each of the tooth grooves is arc-shaped, and a downwardly protruding partition is provided in each of the tooth grooves. The gear has blades, and the blades extend into the tooth grooves. When the driver drives the gear to rotate, the blades can push the partition to move in the direction of opening or closing the cavity, thereby automatically pushing the interconnected tooth plates and the middle plate into or out of the shell.

[0016] In some embodiments, a slideway that is recessed upward and extends in the front-to-back direction is provided on the bottom surface of the tooth plate, and the drive can pass through the slideway; the drive is installed on the bottom inner side of the shell and part of the drive is accommodated in the slideway.

[0017] In some embodiments, the driving mechanism also includes a driving shaft connected to the driver, the tooth grooves are respectively provided on opposite sides of the bottom surface of the tooth plate, the number of the gears is two, the two gears are respectively connected to the two ends of the driving shaft and mesh with the tooth grooves.

[0018] Compared with the prior art, the present invention includes at least the following beneficial effects: the cavity of the present invention has two modes: automatic push-pull mode and manual push-pull mode. By adding a middle layer plate and a connecting mechanism, simple and reliable switching between the automatic push-pull mode and the manual push-pull mode of the cavity is achieved, and manual pushing and pulling of the cavity will not affect the driving mechanism, and the user experience is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a household appliance in an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of a household appliance without the housing 1 in an embodiment of the present invention;

[0021] Figure 3 yes Figure 2 A partial enlarged view of part A;

[0022] Figure 4 is a structural schematic diagram of a connecting mechanism in an embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of a household appliance after hiding the housing 1 and the cavity 2 in an embodiment of the present invention;

[0024] Figure 6is a schematic structural diagram of the household appliance from another angle after the housing 1 is hidden in the embodiment of the present invention;

[0025] Figure 7 yes Figure 6 A partial enlarged view of part B. DETAILED DESCRIPTION

[0026] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0027] like Figure 1-2 As shown, a household appliance of this embodiment can automatically or manually pull out the cavity, and the household appliance is any one of a dishwasher, a disinfection cabinet, an oven or a steamer. This embodiment takes a dishwasher as an example. The dishwasher includes a shell 1 with one side open, a cavity 2, a middle plate 3, at least one connecting mechanism 4 and a driving mechanism 5. The cavity 2 is movably arranged in the shell 1 and is detachably connected to the middle plate 3 through the connecting mechanism 4, so that the cavity 2 and the middle plate 3 are connected as one. The middle plate 3 is movably arranged in the shell 1 and is located at the bottom of the cavity 2. The driving mechanism 5 is connected to the middle plate 3 for automatically pushing the cavity 2 and the middle plate 3 into or out of the shell 1 at the same time. When the cavity 2 is manually pulled out or pushed into the shell 1, it can drive the connecting mechanism 4 to move, thereby making the connecting mechanism 4 detach from the middle plate 3 or making the connecting mechanism 4 cooperate with the middle plate 3.

[0028] The household appliance of this embodiment has two modes of automatic push-pull and manual push-pull for the cavity 2, and by adding the middle plate 3 and the connection mechanism 4, a simple and reliable switch between the automatic push-pull mode and the manual push-pull mode of the cavity 2 is realized, and the driving mechanism 5 is not affected when the cavity 2 is pushed and pulled manually, and the user experience is good. When the cavity 2 is connected to the middle plate 3 as a whole through the connection mechanism 4, the cavity 2 and the middle plate 3 can be automatically pushed into or automatically pushed out of the housing 1 at the same time under the drive of the driving mechanism 5; when the driving mechanism 5 does not work due to a sudden power failure or human factors, the user can push and pull the cavity 2 in the manual push-pull mode.

[0029] like Figure 2-5As shown, further, the top surface of the middle plate 3 is provided with first slots 31 that are concave downwards on opposite sides, and the side wall thereof is provided with first openings 301 that are connected to the first slots 31, and the first slots 31 and the first openings 301 are inclined forward. The number of the connecting mechanism 4 is a pair, including a connecting rod 41 and a roller 42 that are connected to each other, the end of the connecting rod 41 away from the roller 42 is connected to the outer wall of the cavity 2, and the end of the roller 42 away from the connecting rod 41 passes through the first opening 301 and is clamped in the first slot 31. Through the connecting rod 41, when the cavity 2 is manually pulled out of the shell 1, the roller 42 can be driven to disengage from the first slot 31 to release the connection between the cavity 2 and the middle plate 3, or when the cavity 2 is manually pushed into the shell 1, the roller 42 can be driven to clamp into the first slot 31 to connect the cavity 2 with the middle plate 3. Thus, by setting the first slot 31 and the first opening 301 to be inclined forward, when the cavity 2 is manually pulled out, it is convenient for the roller 42 to slide out smoothly and quickly along the first slot 31 under the drive of the connecting rod 41, so that the connection between the cavity 2 and the middle plate 3 is released, thereby realizing a simple and rapid switch from the automatic push-pull mode to the manual push-pull mode. When the roller 42 is separated from the first slot 31, it will enter the back of the cavity 2 to avoid the continued pulling out of the cavity 2 being affected by the roller 42. When the cavity 2 is manually pushed into the shell 1, the roller 42 is pushed into the shell 1 by the connecting rod 41 and slides into the first slot 31, realizing the connection between the cavity 2 and the middle plate 3, thereby completing the switch from the manual push-pull mode to the automatic push-pull mode. In addition, the pair of connecting mechanisms 4 cooperate with the two first slots 31 and the two first openings 301, so that the connection between the cavity 2 and the middle plate 3 is more stable and reliable. In this embodiment, a certain distance is left between the first slot 31 and the back surface of the middle plate 3 to ensure that the side wall of the first slot 31 has sufficient strength.

[0030] Specifically, a boss 411 parallel to the roller 42 is provided at one end of the connecting rod 41 close to the cavity 2 (see Figure 4 ), the length of the boss 411 is less than the length of the roller 42, and the boss 411 is connected to the outer side of the side wall of the cavity 2, so that the connecting rod 41, the boss 411 and the roller 42 together form a "concave" shape, thereby avoiding direct contact between the connecting rod 41 and the outer side walls of the cavity 2 and the middle plate 3, ensuring smooth and reliable movement of the connecting mechanism 4, while reducing the friction between the connecting rod 41 and the cavity 2 and the middle plate 3, which is beneficial to improving the smoothness of the opening and closing of the cavity 2.

[0031] Preferably, a recessed portion 20 (see FIG. 2 ) for accommodating the roller 42 is provided at the lower end of the back side of the cavity 2. Figure 2), the recessed portion 20 is in the shape of a "7", and the roller 42 enters into the recessed portion 20 after being separated from the first slot 31, which is conducive to shortening the length of the connecting rod 41. On the one hand, it ensures that the cavity 2 will not be affected in the smooth pulling out of the cavity 2 when it is manually pulled out, and on the other hand, it ensures that the cavity 2 can smoothly slide into the first slot 31 when the shell 1 is manually pushed.

[0032] Furthermore, a second slot 32 is provided on the top surface of the middle plate 3, which is recessed downward and located in front of the first slot 31. A second opening 302 is provided on the side wall of the middle plate 3, which is inclined forward and respectively connected to the first opening 301 and the second slot 32. The second slot 32 is inclined forward and connected to the first slot 31. In this way, the cross-section of the first slot 31 and the second slot 32 along the movement direction of the cavity 2 forms a "U" shape inclined forward. When the cavity 2 is manually pulled out, it is easier for the roller 42 to slide from the first slot 31 to the second slot 32, and then slide out smoothly from the second slot 32, so that the cavity 2 and the middle plate 3 are quickly disconnected, making it convenient to manually open and close the cavity 2. In addition, a mounting groove (not shown in the figure) is provided on the top surface of the middle layer plate 3, which is located at the upper end of the second card slot 32 and is connected to the second card slot 32. A cover plate 33 flush with the top surface of the middle layer plate 3 is provided in the mounting groove, and one end of the cover plate 33 close to the first card slot 31 is hinged on the middle layer plate 3.

[0033] When the cavity 2 is manually pulled out, the cavity 2 drives the roller 42 to move in the direction of opening the cavity 2 through the connecting rod 41. The roller 42 first slides from the first slot 31 to the second slot 32, then pushes the cover plate 33 open, and finally enters the recessed portion 20 to release the connection between the cavity 2 and the middle plate 3, so that the roller 42 continues to be pulled out with the cavity 2, and the cover plate 33 is reset under its own gravity. At this time, the manual opening and closing of the cavity 2 is convenient and labor-saving, and will not affect or even damage the driving mechanism 5. When the cavity 2 is manually pushed in, the roller 42 is pushed into the housing 1 through the connecting rod 41. After passing the cover plate 33, the roller 42 continues to move backward, and then slides into the first slot 31. When the cavity 2 is completely pushed into the housing 1, the roller 42 just slides to the lowest point of the first slot 31, thereby realizing the connection between the cavity 2 and the middle plate 3, so that the driving mechanism 5 can drive the cavity 2 and the middle plate 3 to open and close automatically.

[0034] Furthermore, on opposite sides of the bottom of the cavity 2, there are protruding blocks (not shown in the figure) protruding downward and extending in the front-back direction, and the protruding blocks are provided with a slide groove 21 extending in the length direction thereof and recessed upward. At least two guide grooves 34 are provided on the top of the middle plate 3, which pass through the front of the middle plate 3. The guide grooves 34 correspond to the positions of the slide grooves 21 one by one, and two guide rails 35 corresponding to and matching the slide grooves 21 are provided in the guide grooves 34. The protruding blocks are embedded in the guide grooves 34, and the slide grooves 21 are matched and engaged with the guide rails 35. During the manual opening and closing process of the cavity 2, the cavity 2 can drive the slide groove 21 to move forward and backward along the guide rails 35, which not only does not affect the volume of the cavity 2, but also makes the automatic opening and closing of the cavity 2 smoother, more convenient and labor-saving.

[0035] like Figure 6 As shown, further, the driving mechanism 5 includes a driver 51 and a transmission assembly 52 that are connected to each other. The transmission assembly 52 is connected to the middle plate 3. The driver 51 drives the middle plate 3 to move forward and backward through the transmission assembly 52. ​​The movement of the middle plate 3 can drive the cavity 2 to be automatically pushed out or pushed into the shell 1, thereby realizing automatic opening and closing of the cavity 2 and the middle plate 3, which is highly intelligent and has a good user experience.

[0036] Furthermore, the driving mechanism 5 also includes a driving shaft 53 connected to the driver 51. The transmission assembly 52 includes a tooth plate 520 and two gears 521. A concave groove that is recessed toward the inside of the middle plate 3 is provided at the center of the bottom surface of the middle plate 3. The tooth plate 520 is connected to the concave groove of the middle plate 3 and a plurality of tooth grooves 5201 extending in the front-back direction are provided on the opposite sides of its bottom surface. The two gears 521 are respectively connected to the two ends of the driving shaft 53 and mesh with the tooth grooves 5201. Therefore, the provision of the tooth plate 520 makes the processing and manufacturing of the tooth grooves 5201 easier and more convenient; through the drive of the driver 51 and the cooperation of the pair of meshing gears 521 and the tooth grooves 5201, the cavity 2 and the middle plate 3 are reliably pushed into or pushed out of the housing 1 automatically in a gear transmission manner, thereby realizing automatic control of the opening and closing of the cavity 2 and the middle plate 3. In other embodiments, the tooth plate 520 may be omitted, and only a rack that can mesh with the gear 521 may be provided on the bottom surface of the middle plate 3, which is helpful in saving manufacturing materials and reducing manufacturing costs.

[0037] like Figure 6As shown, specifically, each tooth groove 5201 is arc-shaped to avoid interference with the blade 5211, and a downwardly protruding partition 5202 is provided in each tooth groove 5201. The gear 521 has a blade 5211, and the blade 5211 extends into the tooth groove 5201. When the driver 51 drives the gear 521 to rotate, the gear 521 can synchronously drive the blade 5211 to rotate, and the rotation of the blade 5211 can push the partition 5202 toward the opening or closing direction of the cavity 2, so as to automatically push the interconnected tooth plate 520 and the middle plate 3 into or out of the housing 1, thereby realizing the automatic pushing of the cavity 23 connected with the middle plate 3 into or out of the housing 1. Preferably, the blade 5211 of this embodiment is four pieces, and the partition 5202 is arranged at the center of the tooth groove 5201 and is flush with the tooth plate 520, so as to ensure the reliable movement of the transmission assembly 52 while making the structure of the transmission assembly 52 simpler and easier to manufacture.

[0038] Specifically, a slideway 5203 is provided on the bottom surface of the tooth plate 520, which is recessed upward and extends in the front-rear direction (see Figure 6 ), the slideway 5203 can not only allow the driver 51 to pass smoothly, but also increase the installation space of the driver 51 to accommodate the driver 51 with a larger power. The driver 51 is installed in the middle of the bottom inner side of the housing 1 and close to the opening of the housing 1 to facilitate the disassembly and subsequent maintenance of the driver 51. Part of the driver 51 is accommodated in the slideway 5203 to reduce the space occupied by the driver 51.

[0039] When the driver 51 runs in the forward direction, it drives the gear 521 to rotate clockwise, and the blade 5211 extending into the tooth groove 5201 will push the partition 5202 to move in the opening direction of the cavity 2, thereby automatically pushing the connected tooth plate 520, the middle plate 3 and the cavity 2 out of the shell 1 at the same time; conversely, the tooth plate 520, the middle plate 3 and the cavity 2 can be automatically pushed into the shell 1.

[0040] In this embodiment, the dishwasher further includes a shock absorber 6 , wherein the shock absorber 6 is installed between the bottom of the driver 51 and the inner side of the bottom of the housing 1 to reduce the noise and vibration generated when the driver 51 is running.

[0041] The dishwasher also includes two support plates 7, which are arranged on the left and right sides of the inner bottom side of the shell 1 to support the middle plate 3. On the one hand, they are used to raise the height of the tooth plate 520 connected to the middle plate 3 to avoid friction between the gear 521 and the inner bottom side of the shell 1 when the gear 521 rotates, thereby improving the smoothness of automatic opening and closing of the middle plate 3 and the cavity 2; on the other hand, they can increase the friction between the middle plate 3 and the support plates 7 to ensure that the middle plate 3 and the cavity 2 connected as one can only move forward and backward synchronously under the gear transmission. At the same time, when the cavity 2 is not subjected to manual pushing and pulling force, the middle plate 3 and the cavity 2 will not be separated, ensuring that the cavity 2 will not have the abnormal phenomenon of opening and closing at will.

[0042] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A household appliance with a cavity that can be automatically or manually pulled out, comprising a housing (1) with one side open, and a cavity (2) movably arranged in the housing (1), characterized in that: It also comprises a middle plate (3), at least one connecting mechanism (4) and a driving mechanism (5); the middle plate (3) is movably arranged in the shell (1) and located at the bottom of the cavity (2); the cavity (2) is detachably connected to the middle plate (3) via the connecting mechanism (4); the driving mechanism (5) is connected to the middle plate (3) and is used to automatically push the cavity (2) and the middle plate (3) into or out of the shell (1); When the cavity (2) is manually pulled out or pushed into the shell (1), it can drive the connecting mechanism (4) to move, thereby causing the connecting mechanism (4) to be separated from the middle plate (3) or causing the connecting mechanism (4) to be matched and engaged with the middle plate (3); It also comprises two support plates (7), which are arranged on the left and right sides of the inner bottom of the shell (1) and are used to support the middle plate (3).

2. A household appliance with a cavity that can be automatically or manually pulled out according to claim 1, characterized in that: At least one side of the top surface of the middle plate (3) is provided with a first slot (31) recessed downward, and a side wall thereof is provided with a first opening (301) connected to the first slot (31); the connection mechanism (4) comprises a connecting rod (41) and a roller (42) connected to each other, one end of the connecting rod (41) away from the roller (42) is connected to the outer side wall of the cavity (2), and one end of the roller (42) away from the connecting rod (41) passes through the first opening (301) and is clamped in the first slot (31); Through the connecting rod (41), the cavity (2) can drive the roller (42) to disengage from the first slot (31) or to be inserted into the first slot (31) when the housing (1) is manually pulled out or pushed in.

3. A household appliance with a cavity that can be automatically or manually pulled out according to claim 2, characterized in that: A boss (411) parallel to the roller (42) is provided at one end of the connecting rod (41) close to the cavity (2), and the boss (411) is connected to the outer side of the side wall of the cavity (2); the first slot (31) and the first opening (301) are inclined forward.

4. A household appliance with a cavity that can be automatically or manually pulled out according to claim 3, characterized in that: A recessed portion (20) for accommodating the roller (42) is provided at the lower end of the back side of the cavity (2); the roller (42) enters the recessed portion (20) after being separated from the first clamping groove (31).

5. A household appliance with a cavity that can be automatically or manually pulled out according to claim 4, characterized in that: The top surface of the middle layer plate (3) is provided with a second card slot (32) and a mounting slot which are recessed downward and located in front of the first card slot (31); the side wall of the middle layer plate (3) is provided with a second opening (302) which is respectively connected to the first opening (301) and the second card slot (32); the second card slot (32) is connected to the first card slot (31); the mounting slot is located at the upper end of the second card slot (32) and is connected to the second card slot (32); a cover plate (33) which is flush with the top surface of the middle layer plate (3) is provided in the mounting slot; one end of the cover plate (33) which is close to the first card slot (31) is hinged to the middle layer plate (3).

6. A household appliance with a cavity that can be automatically or manually pulled out according to claim 5, characterized in that: The cross-section of the first clamping groove (31) and the second clamping groove (32) along the moving direction of the cavity (2) forms a "U" shape inclined forward.

7. A household appliance with a cavity that can be automatically or manually pulled out according to claim 1, characterized in that: A slide groove (21) extending in the front-to-back direction is provided at the bottom of the cavity (2), and a guide rail (35) corresponding to and matching the slide groove (21) is provided at the top of the middle plate (3).

8. A household appliance with a cavity that can be automatically or manually pulled out according to any one of claims 1 to 7, characterized in that: The driving mechanism (5) comprises a driver (51) and a transmission assembly (52) which are connected to each other. The transmission assembly (52) is connected to the middle plate (3) in a cooperative manner. The driver (51) drives the middle plate (3) to move forward and backward through the transmission assembly (52). The movement of the middle plate (3) can drive the cavity (2) to be automatically pushed out of or into the shell (1).

9. A household appliance with a cavity that can be automatically or manually pulled out according to claim 8, characterized in that: The transmission assembly (52) comprises a gear (521) and a rack that mesh with each other, the gear (521) being connected to the driver (51), and the rack extending in the front-rear direction is provided on the bottom surface of the middle plate (3).

10. A household appliance with a cavity that can be automatically or manually pulled out according to claim 8, characterized in that: The transmission assembly (52) comprises a tooth plate (520) and at least one gear (521); the tooth plate (520) is connected to the bottom of the middle plate (3) and a bottom surface thereof is provided with a plurality of tooth grooves (5201) extending in the front-rear direction; the gear (521) is meshed with the tooth grooves (5201) and is connected to the driver (51).

11. A household appliance with a cavity that can be automatically or manually pulled out according to claim 10, characterized in that: Each of the tooth grooves (5201) is arc-shaped, and a downwardly protruding partition (5202) is provided in each of the tooth grooves (5201); the gear (521) has a blade (5211), and the blade (5211) extends into the tooth groove (5201); When the driver (51) drives the gear (521) to rotate, the blade (5211) can push the partition (5202) to move in the direction of opening or closing the cavity (2), thereby automatically pushing the interconnected tooth plate (520) and the middle plate (3) into or out of the shell (1).

12. A household appliance with a cavity that can be automatically or manually pulled out according to claim 11, characterized in that: A slideway (5203) is provided on the bottom surface of the tooth plate (520) and is recessed upward and extends in the front-to-back direction. The slideway (5203) allows the driver (51) to pass through. The driver (51) is installed on the inner side of the bottom of the housing (1) and part of the driver (51) is accommodated in the slideway (5203).

13. A household appliance with a cavity that can be automatically or manually pulled out according to claim 11 or 12, characterized in that: The driving mechanism (5) further comprises a driving shaft (53) connected to the driver (51), and tooth grooves (5201) are respectively provided on opposite sides of the bottom surface of the tooth plate (520), and the number of the gears (521) is two, and the two gears (521) are respectively connected to the two ends of the driving shaft (53) and mesh with the tooth grooves (5201).

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