CN219889062U - Height adjusting device and household appliance - Google Patents

Abstract

The utility model provides a height adjusting device and a household appliance, wherein the height adjusting device comprises: a substrate having a mounting groove; the adjusting screw is positioned in the mounting groove, and the axial direction of the adjusting screw is parallel to the depth direction of the mounting groove; the foot assembly comprises a foot bracket and a foot connected to the foot bracket, the foot is used for being supported on a bearing surface, the foot bracket comprises an adjusting part connected to the adjusting screw in a threaded manner, a connecting part connected to one radial side of the adjusting part, and the foot is connected to the connecting part; when the adjusting screw rotates, the adjusting part moves along the axial direction of the adjusting screw; the structure is simple and the adjustment is convenient; the foot and the adjusting screw rod connected to the connecting part can not interfere, a user can rotate the adjusting screw rod without lifting the refrigerator, and the height of the refrigerator at the position corresponding to the height adjusting device is adjusted, so that the operation is simple and convenient.

Description

Height adjusting device and household appliance

Technical Field

The utility model relates to the field of refrigeration, in particular to a height adjusting device and a household appliance with the same.

Background

In general, a home appliance, such as a refrigerator, is placed on a horizontal floor without adjusting the level of the home appliance. However, the ground in the home of the user is difficult to be ensured to be horizontal, on one hand, the household appliance is easy to skew, the noise of the household appliance is possibly increased, and the service performance of the household appliance is even affected; on the other hand, if the household appliance is embedded into the cabinet/wall body for placement, when the ground is uneven, even if one end only has a bulge or a recess of a few millimeters, the other end has larger deviation, so that the household appliance cannot be placed in the middle.

Currently, a stand with adjustable height as shown in chinese patent application No. CN201497280U is generally installed at the bottom of a household appliance, and comprises a stand bar supported on the ground, a screw connected to the stand bar, and a screw hole matched with the screw is formed at the bottom of the refrigerator. When adjusting the refrigerator level, need lift the refrigerator of this side, rotate the screw rod again from the downside of refrigerator in order to adjust the height of stabilizer blade, need repeated adjustment many times, the operation is more loaded down with trivial details, has increased the difficulty of domestic appliance installation, can't ensure the balance, simultaneously, can't realize adjusting yet to embedded domestic appliance.

Disclosure of Invention

The utility model aims to provide a height adjusting device and a household appliance with the same.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: a height adjustment device, comprising:

a substrate having a mounting groove;

the adjusting screw is positioned in the mounting groove, and the axial direction of the adjusting screw is parallel to the depth direction of the mounting groove;

the foot assembly comprises a foot bracket and a foot connected to the foot bracket, the foot is used for being supported on a bearing surface, the foot bracket comprises an adjusting part connected to the adjusting screw in a threaded manner, a connecting part connected to one radial side of the adjusting part, and the foot is connected to the connecting part;

when the adjusting screw rotates, the adjusting part moves along the axial direction of the adjusting screw.

As a further improved technical scheme of the utility model, the adjusting part is provided with a threaded hole which penetrates through, and the adjusting screw is in threaded connection with the threaded hole; the adjusting screw is provided with an operating end, and the operating end is exposed to the outer side of the mounting groove from the threaded hole.

As a further improved technical scheme of the utility model, one of the mounting groove and the adjusting part is provided with a limiting block, the other is provided with a limiting groove matched with the limiting block, and the limiting groove extends along the axial direction of the adjusting screw.

As a further improved technical scheme of the utility model, the cross section of the mounting groove is non-circular, and the peripheral shape of the adjusting part is matched with the mounting groove.

As a further improved technical scheme of the utility model, the height adjusting device further comprises an anti-falling structure used for limiting the adjusting screw and/or the adjusting part in the mounting groove.

According to the technical scheme, the anti-falling structure comprises an anti-falling block arranged at one end of the adjusting part, which faces the bottom of the mounting groove, and a limiting ring protruding from the notch of the mounting groove to the center of the notch, wherein the anti-falling block protrudes from the periphery of the adjusting part along the radial direction of the adjusting part and away from the center of the adjusting part, and the distance from one end of the anti-falling block, which is away from the adjusting part, to the central axis of the mounting groove is larger than the distance from the limiting ring to the central axis of the mounting groove.

As a further improved technical scheme of the utility model, the adjusting part comprises a threaded section connected to the adjusting screw rod in a threaded manner, and a plurality of elastic pieces connected to one end of the threaded section, which faces the bottom of the mounting groove, wherein the elastic pieces are distributed at intervals along the circumferential direction of the threaded section, and the anti-falling blocks are arranged on the elastic pieces.

As a further improved technical scheme of the utility model, the adjusting screw is provided with an inner end face facing the bottom of the mounting groove, the anti-falling structure is a fastener connected between the inner end face and the bottom of the mounting groove, and the adjusting screw is rotatably connected with the mounting groove.

As a further improved technical scheme of the utility model, the adjusting screw is provided with an inner end face facing the bottom of the mounting groove, one of the inner end face and the bottom of the mounting groove is provided with a guide pillar, the other guide pillar is provided with a guide groove matched with the guide pillar, and the guide groove is an arc groove taking the rotation center of the adjusting screw as the center of a circle.

As a further improved technical scheme of the utility model, a yielding cavity for yielding the connecting part is concavely arranged on one side of the base plate facing the bottom foot, and the mounting groove is communicated with the yielding cavity.

As a further development of the utility model, the foot is a roller which is rotatably connected to the foot support.

In order to achieve the above object, the present utility model further provides a household appliance having the above height adjusting device; the base plate is a base of the household appliance or is connected to the base of the household appliance.

The beneficial effects of the utility model are as follows: according to the height adjusting device, the foot component in threaded connection with the adjusting screw rod is arranged, and the foot of the foot component and the adjusting screw rod are arranged side by side in the horizontal direction, so that interference between the foot connected to the connecting part and the adjusting screw rod is avoided, a user can rotate the adjusting screw rod without lifting the refrigerator, the height of the refrigerator at the position corresponding to the height adjusting device is adjusted, and the operation is simple and convenient.

Drawings

FIG. 1 is a schematic view of a height adjustment device according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the height adjustment device of FIG. 1;

FIG. 3 is a schematic view of the construction of the foot housing of FIG. 2;

FIG. 4 is a schematic view of another angle of the height adjustment device of FIG. 1;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a schematic view of a height adjustment device according to another embodiment of the present utility model;

FIG. 7 is an exploded view of the height adjustment device of FIG. 6;

FIG. 8 is a schematic view of another angle of the height adjustment device of FIG. 6;

fig. 9 is a sectional view taken along line B-B in fig. 8.

Detailed Description

The present utility model will be described in detail with reference to the embodiments shown in the drawings, and reference is made to fig. 1 to 9, which are preferred embodiments of the present utility model. It should be understood that these embodiments are not intended to limit the present utility model, and that functional, method, or structural equivalents and alternatives falling within the scope of the present utility model may be modified by any person skilled in the art to include such embodiments.

In the description of the present utility model, for convenience of description, when the household appliance is used, a side close to a user is a front, and the remaining directions of "back", "left" and "right" are all referred to in the past. It will be appreciated that this is for convenience of description only and is not an indication or suggestion that the apparatus or elements must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Further, it should also be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1 to 9, the present utility model provides a height adjusting device 10 and a household appliance having the height adjusting device 10. The height adjusting device 10 is fixed at the bottom of the object to be carried, so that the object to be carried is placed on the carrying surface, the height of the position, corresponding to the height adjusting device 10, of the object to be carried can be adjusted by adjusting the height of the height adjusting device 10, the level of the object to be carried is adjusted, the problem of inclination of the object to be carried due to the flatness of the carrying surface is avoided, horizontal placement is achieved, and safety and reliability are achieved.

The household appliances include, but are not limited to, refrigerators, freezers, washing machines, clothes dryers, washing and drying all-in-one machines, and the like. It is understood that the term "object to be carried" refers to the household appliance when the height adjustment device 10 is fixed to the bottom of the household appliance. In the following, the refrigerator is taken as an example of the object to be carried, which is specifically described, but not limited to the above.

Meanwhile, the bearing surface can be any feasible plane, inclined surface, arc surface and the like. For example, it may be a floor, a table top, a step surface, etc. In the following, the bearing surface is taken as an example of the ground, and specific explanation is made.

Referring to fig. 1 to 2, the height adjusting apparatus 10 includes a base plate 1 having a mounting groove 11, an adjusting screw 2 disposed in the mounting groove 11, and a foot assembly 3 screwed to the adjusting screw 2, wherein the foot assembly 3 includes a foot bracket 31 screwed to the adjusting screw 2, and a foot 32 coupled to the foot bracket 31. When the height adjusting device 10 is fixed at the bottom of the refrigerator, the notch of the mounting groove 11 is opened towards the ground, and the axial direction of the adjusting screw 2 is parallel to the depth direction of the mounting groove 11.

When the refrigerator with the height adjusting device 10 is supported on the ground, the notch of the mounting groove 11 is opened towards the bearing surface, the foot 32 is supported on the ground, and under the action of gravity of the refrigerator, the adjusting screw 2 is abutted against the groove bottom towards the inner end surface 22 of the groove bottom of the mounting groove 11. When the adjusting screw 2 is rotated, the foot assembly 3 moves along the axial direction of the adjusting screw 2, so that the distance between the foot 32 and the base plate 1 can be adjusted, and the height between the refrigerator and the ground at the position corresponding to the height adjusting device 10 can be adjusted, so that the level of the refrigerator can be adjusted.

Specifically, as shown in fig. 2, the foot housing 31 includes an adjusting portion 311 screwed to the adjusting screw 2, a connecting portion 312 connected to one side in the radial direction of the adjusting portion 311, and the foot 32 is connected to the connecting portion 312. That is, the adjusting part 311 and the connecting part 312 are arranged side by side in the horizontal direction, so that the foot 32 connected to the connecting part 312 does not interfere with the adjusting screw 2 at the adjusting part 311, and a user can rotate the adjusting screw 2 without lifting the refrigerator to adjust the height of the refrigerator at the position corresponding to the height adjusting device 10, thereby having simple and convenient operation.

Further, the adjusting part 311 has a threaded hole 3111 penetrating therethrough, and the adjusting screw 2 is screwed into the threaded hole 3111; the adjusting screw 2 has an operation end 21 opposite to the inner end surface 22, and the operation end 21 is exposed from the screw hole 3111 to the outside of the mounting groove 11. That is, the operation end 21 is exposed outward from the screw hole 3111, so that a user can operate the operation end 21 by a tool to rotate the adjustment screw 2 without lifting the refrigerator.

Specifically, the operation end 21 is concavely provided with a polygonal groove 211, such as a regular hexagonal groove, and the user can rotate the adjusting screw 2 by using a wrench adapted to the polygonal groove 211, so that the operation is simple.

Further, in the present utility model, the adjusting portion 311 is only movable in the axial direction of the adjusting screw 2, that is, when the adjusting screw 2 rotates, the adjusting portion 311 does not rotate with the adjusting screw 2, but moves in the axial direction of the adjusting screw 2, and the rotation of the adjusting screw 2 is converted into a linear movement of the adjusting portion 311 in the axial direction of the adjusting screw 2, and the distance of the foot 32 from the base plate 1 is adjusted, thereby adjusting the height of the refrigerator from the ground at the position corresponding to the height adjusting device 10.

Referring to fig. 2 to 5, in a specific embodiment of enabling the adjusting portion 311 to move only along the axial direction of the adjusting screw 2, a stopper 111 is provided on one of the mounting groove 11 and the adjusting portion 311, and a stopper groove 3112 is provided on the other of the mounting groove and the adjusting portion 311, the stopper groove 3112 being engaged with the stopper 111, and the stopper groove 3112 extending along the axial direction of the adjusting screw 2. The limiting block 111 is matched with the limiting groove 3112, and limits the rotation of the adjusting portion 311 along with the adjusting screw 2, so that the adjusting portion 311 can only move along the axial direction of the adjusting screw 2. Thus, when the adjusting screw 2 is operated to rotate, the adjusting portion 311 moves in the axial direction of the adjusting screw 2, the rotation of the adjusting screw 2 is converted into the linear movement of the adjusting portion 311 in the axial direction of the adjusting screw 2, the distance of the foot 32 from the base plate 1 is adjusted, and thus, the height of the refrigerator from the ground at the position corresponding to the height adjusting device 10 is adjusted, and thus, the level of the refrigerator can be adjusted.

Specifically, the notch of the mounting groove 11 is provided with the stopper 111 protruding toward the center of the notch, and the adjusting portion 311 is provided with a stopper groove 3112 extending in the axial direction of the adjusting screw 2. Of course, this is not a limitation.

Referring to fig. 7 to 9, in another embodiment of the adjusting portion 311 that can move only in the axial direction of the adjusting screw 2, the cross section of the mounting groove 11a is non-circular, and the outer peripheral shape of the adjusting portion 311a is adapted to the mounting groove 11 a. The adjustment portion 311a is not rotatable relative to the mounting groove 11a, and is movable only in the depth direction of the mounting groove 11a relative to the mounting groove 11 a. Thus, when the adjusting screw 2 is operated to rotate, the adjusting portion 311a moves in the axial direction of the adjusting screw 2, the rotation of the adjusting screw 2 is converted into the linear movement of the adjusting portion 311a in the axial direction of the adjusting screw 2, the distance of the foot 32 from the base plate 1 is adjusted, and thus, the height of the refrigerator from the ground at the position corresponding to the height adjusting device 10 is adjusted, and thus, the level of the refrigerator can be adjusted.

The above-mentioned adaptation means that the outer circumferential shape of the adjustment portion 311a is the same as the cross-sectional shape of the installation groove 11a, and the outer circumference of the adjustment portion 311a is attached to the inner side surface of the installation groove 11 a.

In a specific embodiment, the cross section of the mounting groove 11a is rectangular, and the outer periphery of the adjusting portion 311a is rectangular to adapt to the cross section of the mounting groove 11 a. Of course, it is not limited thereto, and it is understood that the cross section of the mounting groove 11a may be a non-circular shape.

Further, the height adjusting device 10 further includes a drop-preventing structure for limiting the adjusting screw 2 and/or the adjusting portion 311 to the installation groove 11. So that the adjusting screw 2 and the foot assembly 3 can be stably positioned in the mounting groove 11, and the stability of the height adjusting device 10 is enhanced.

Referring to fig. 3 to 5, in a specific embodiment of the anti-disengagement structure, the anti-disengagement structure includes an anti-disengagement block 4 disposed at one end of the adjusting portion 311 facing the bottom of the mounting groove 11, and a stop ring 5 protruding from the notch of the mounting groove 11 toward the center of the notch, the anti-disengagement block 4 protrudes from the outer periphery of the adjusting portion 311 along the radial direction of the adjusting portion 311 toward the center direction away from the adjusting portion 311, and the distance between one end of the anti-disengagement block 4 away from the adjusting portion 311 and the central axis of the mounting groove 11 is greater than the distance between the stop ring 5 and the central axis of the mounting groove 11. When the adjusting screw 2 is not fixed in the mounting groove 11, the adjusting portion 311 is in threaded connection with the adjusting screw 2, so that when the height adjusting device 10 is not subject to the gravity of the refrigerator, the anti-falling block 4 is matched with the limiting ring 5, and the foot assembly 3 and the adjusting screw 2 can be prevented from being separated from the mounting groove 11. When the foot 32 is supported on the ground and the height adjusting device 10 is under the gravity of the refrigerator, the inner end surface 22 abuts against the bottom of the mounting groove 11, and at this time, the anti-falling block 4 is matched with the limiting ring 5, so that the maximum distance of the downward movement of the foot component 3 can be limited, and the downward movement of the foot component 3 is prevented from being excessively separated from the adjusting screw 2.

By providing the integral retainer ring 5, the adjustment portion 311 can be prevented from being displaced in rotation, and the adjustment portion 311 can be prevented from being separated from the mounting groove 11. Enhancing the stability of the height adjustment device 10.

The center of the limiting ring 5 is located on the central axis of the mounting groove 11. The central axis of the mounting groove 11 coincides with the central axis of the adjusting screw.

Specifically, the adjusting portion 311 includes a threaded section 3114 screwed onto the adjusting screw 2, a plurality of elastic pieces 3115 connected to an end of the threaded section 3114 facing the bottom of the mounting groove 11, the plurality of elastic pieces 3115 are circumferentially spaced along the threaded section 3114, and the anti-falling block 4 is disposed on the elastic pieces 3115. During assembly, the elastic plates 3115 retract to enable the anti-falling block 4 to enter the mounting groove 11 from the limiting ring 5, so that the assembly between the foot assembly 3 and the mounting groove 11 is facilitated.

Specifically, the end surface of the anti-falling block 4 away from the threaded section 3114 has a guiding inclined surface 41, when the foot bracket 31 is pushed into the mounting groove 11 during assembly, the guiding inclined surface 41 contacts with the limiting ring 5, and the plurality of spring plates 3115 retract inwards to enable the anti-falling block 4 to enter the mounting groove 11 from the limiting ring 5, so that the foot assembly 3 and the mounting groove 11 can be assembled conveniently.

In the embodiment in which the adjusting portion 311 includes a plurality of elastic pieces 3115 and the mounting groove 11 and the adjusting portion 311 are configured to limit the rotation of the adjusting portion 311 along with the adjusting screw 2 by using a matched limiting block 111 and a limiting groove 3112, gaps between adjacent elastic pieces 3115 may be used as the limiting grooves 3112, and the limiting block 111 is disposed on the limiting ring 5 in a protruding manner. Of course, this is not a limitation.

It should be noted that, in the embodiment in which the anti-disengaging structure is an anti-disengaging block 4 disposed at one end of the adjusting portion 311 facing the bottom of the mounting groove 11, and a stop collar 5 protruding from the notch of the mounting groove 11 toward the center of the notch, and the cross section of the mounting groove 11a is non-circular, the outer circumferential shape of the adjusting portion 311a is adapted to the mounting groove 11a to limit the rotation of the adjusting portion 311a along with the adjusting screw 2, the outer circumferential shape of the adjusting portion 311a is adapted to the mounting groove 11a, and the outer circumferential shape of the adjusting portion 311a is adapted to the inner circumferential shape of the stop collar 5 to limit the rotation of the adjusting portion 311a along with the adjusting screw 2.

Referring to fig. 7 to 9, in another embodiment of the anti-disengagement structure, the anti-disengagement structure is a fastener 6 connected between the inner end surface 22 and the groove bottom, and the adjusting screw 2 is rotatably connected to the mounting groove 11. That is, the fastener 6 restricts the movement of the adjusting screw 2 in the axial direction thereof with respect to the mounting groove 11, so that the adjusting screw 2 can be prevented from coming out of the mounting groove 11.

Specifically, the tank bottom is provided with a through hole 112 along the depth direction of the mounting groove 11, the fastening piece 6 comprises a limit piece 61 and a connecting column 62 connected to the limit piece 61, the outer diameter of the limit piece 61 is larger than the aperture of the through hole 112, after the fastening piece 6 penetrates into the through hole 112 from the outside of the tank bottom, the limit piece 61 is propped against the outside of the tank bottom, the connecting column 62 is positioned in the through hole 112, and the inner end surface 22 of the adjusting screw 2 is fixedly connected to one end of the connecting column 62 far away from the limit piece 61. When the adjusting screw 2 rotates, the connecting post 62 rotates relative to the through hole 112, so that the adjusting screw 2 is rotatably connected in the mounting groove 11.

It is known that in the embodiment where the adjusting screw 2 is rotatably connected to the mounting groove 11 by the fastening member 6, the limiting ring 5 and the anti-falling block 4 matched with the limiting ring 5 may be disposed between the adjusting portion 311 and the mounting groove 11, so as to limit the maximum distance of the downward movement of the foot assembly 3 and prevent the foot assembly 3 from being excessively removed from the adjusting screw 2.

The specific structures of the limiting ring 5 and the anti-drop block 4 are as described above, and will not be described herein.

Further, one of the inner end surface 22 and the groove bottom is provided with a guide post 113, and the other is provided with a guide groove 221 matched with the guide post 113, and the guide groove 221 is an arc groove with the rotation center of the adjusting screw 2 as a circle center. When the adjusting screw 2 rotates, the guide post 113 moves along the guide groove 221, so that the stability of the rotation of the adjusting screw 2 can be enhanced, and shaking is avoided.

In one embodiment, referring to fig. 7 and 9, the guide post 113 is an annular guide post 113 disposed at the bottom of the groove, and the guide slot 221 is an annular guide slot 221 disposed at the inner end surface 22. Of course, this is not a limitation.

Further, the foot 32 is a roller rotatably coupled to the foot housing 31 to facilitate movement of the refrigerator.

Further, as shown in fig. 2, the substrate 1 is further concavely provided with a yielding cavity 7 for yielding the connection portion 312, and the mounting groove 11 is concavely formed from the bottom of the yielding cavity 7. The upward adjustment range of the foot assembly 3 can be increased, thereby improving the versatility of the height adjustment device 10.

In this embodiment, the base plate 1 is a base of a refrigerator, and the adjusting screw 2 and the foot assembly 3 may be assembled into the mounting groove 11 after the base plate 1 is assembled to the bottom of the refrigerator and foaming is completed. Of course, the substrate 1 is not limited thereto, and in other embodiments, the substrate may be connected to a base of a refrigerator.

In summary, in the height adjusting device 10 of the present utility model, by providing the foot assembly 3 screwed with the adjusting screw 2, and arranging the foot 32 of the foot assembly 3 and the adjusting screw 2 side by side in the horizontal direction, interference between the foot 32 connected to the connecting portion 312 and the adjusting screw 2 is not generated, and a user can rotate the adjusting screw 2 without lifting the refrigerator, so as to adjust the height of the refrigerator at the position corresponding to the height adjusting device 10, which is easy to operate.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims (12)

1. A height adjustment device, characterized in that: comprising the following steps:

a substrate having a mounting groove;

the adjusting screw is positioned in the mounting groove, and the axial direction of the adjusting screw is parallel to the depth direction of the mounting groove;

the foot assembly comprises a foot bracket and a foot connected to the foot bracket, the foot is used for being supported on a bearing surface, the foot bracket comprises an adjusting part connected to the adjusting screw in a threaded manner, a connecting part connected to one radial side of the adjusting part, and the foot is connected to the connecting part;

when the adjusting screw rotates, the adjusting part moves along the axial direction of the adjusting screw.

2. The height adjustment device according to claim 1, wherein: the adjusting part is provided with a threaded hole which penetrates through the adjusting part, and the adjusting screw is connected in the threaded hole in a threaded manner; the adjusting screw is provided with an operating end, and the operating end is exposed to the outer side of the mounting groove from the threaded hole.

3. The height adjustment device according to claim 1, wherein: one of the mounting groove and the adjusting part is provided with a limiting block, the other one of the mounting groove and the adjusting part is provided with a limiting groove matched with the limiting block, and the limiting groove extends along the axial direction of the adjusting screw.

4. The height adjustment device according to claim 1, wherein: the cross section of the mounting groove is non-circular, and the peripheral shape of the adjusting part is matched with the mounting groove.

5. The height adjustment device according to claim 1, wherein: the height adjusting device further comprises an anti-falling structure used for limiting the adjusting screw and/or the adjusting part to be positioned in the mounting groove.

6. The height adjustment device according to claim 5, wherein: the anti-falling structure comprises an anti-falling block arranged at one end of the adjusting part, which faces the bottom of the mounting groove, a limiting ring protruding from the notch of the mounting groove to the center of the notch, the anti-falling block protrudes from the periphery of the adjusting part along the radial direction of the adjusting part away from the center direction of the adjusting part, and the distance from one end of the adjusting part to the central axis of the mounting groove is greater than the distance from the limiting ring to the central axis of the mounting groove.

7. The height adjustment device according to claim 6, wherein: the adjusting part comprises a threaded section connected to the adjusting screw rod, and a plurality of elastic pieces connected to one end of the threaded section, which faces the bottom of the mounting groove, wherein the elastic pieces are distributed along the circumferential direction of the threaded section at intervals, and the anti-falling blocks are arranged on the elastic pieces.

8. The height adjustment device according to claim 5, wherein: the adjusting screw is provided with an inner end face which faces the bottom of the mounting groove, the anti-falling structure is a fastener connected between the inner end face and the bottom of the mounting groove, and the adjusting screw is rotationally connected with the mounting groove.

9. The height adjustment device according to claim 1, wherein: the adjusting screw is provided with an inner end face facing the bottom of the mounting groove, one of the inner end face and the bottom of the mounting groove is provided with a guide pillar, the other guide pillar is provided with a guide groove matched with the guide pillar, and the guide groove is an arc groove taking the rotation center of the adjusting screw as the center of a circle.

10. The height adjustment device according to claim 1, wherein: and a yielding cavity for yielding the connecting part is concavely arranged on one side of the base plate, facing the bottom foot, and the mounting groove is communicated with the yielding cavity.

11. The height adjustment device according to claim 1, wherein: the footing is a roller rotatably connected to the footing bracket.

12. A household appliance, characterized in that: the household appliance has the height adjusting device according to any one of claims 1 to 11; the base plate is a base of the household appliance or is connected to the base of the household appliance.