Household appliance base support

Abstract

The utility model belongs to the technical field of supporting devices, and provides a household appliance base support which comprises a supporting frame. The rolling wheel is movably connected to the supporting frame and has a locking state and a free state; the brake piece is movably arranged on the supporting frame and movably abuts against the rolling wheels, and the brake piece has a contraction state and an opening state; when the brake piece is in the unfolded state, the brake piece abuts against the rolling wheel, the rolling wheel is in the locked state, and when the brake piece is switched to the contracted state, the brake piece is separated from the rolling wheel, and the rolling wheel is switched to the free state. Compared with the prior art, the state switching of the idler wheels is realized by arranging the idler wheels with the free state and the locking state on the supporting frame and arranging the brake pieces with the contraction state and the opening state on the supporting frame, so that the brake structure is simpler, the manufacturing cost is lower, and the operation is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of support device, specifically relates to a household appliance base support. BACKGROUND

[0002] The washing machine base support is an auxiliary equipment for supporting the washing machine. Usually, in order to conveniently and labor-savingly move the washing machine, the roller needs to be arranged at the bottom of the support. When the washing machine is moved to the target position, the roller needs to be locked.

[0003] In order to meet the above use requirement, the washing machine support with the brake structure to lock the roller appears in the market at present. However, the washing machine base support with the brake function has the complex structure, the high manufacturing cost and the inconvenient use, and in the scene that the washing machine is put into the cabinet, the two sides do not have the space operation, and the use is inconvenient. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem in the prior art and provides a household appliance base support.

[0005] The utility model adopts the technical scheme that the household appliance base support is provided, which comprises a support frame.

[0006] The roller is movably connected to the support frame and has a locking state and a free state. When the roller is in the free state, the roller can roll on the support plane. When the roller is in the locking state, the roller cannot roll on the support plane.

[0007] The brake piece is movably arranged on the support frame and movably abuts against the roller. The brake piece has a retracted state and an expanded state. When the brake piece is in the expanded state, the brake piece abuts against the roller, and the roller is in the locking state. When the brake piece is switched to the retracted state, the brake piece is separated from the roller, and the roller is switched to the free state.

[0008] The household appliance base support further comprises a handle movably arranged in front of the support frame. The handle is in transmission connection with the brake piece and is used to drive the brake piece to switch between the retracted state and the expanded state.

[0009] The support frame is provided with a side baffle on the side facing the roller. The roller is located between the side baffle and the brake piece.

[0010] When the roller is in the free state, both ends of the roller along its axial direction have gaps with the side baffle and the brake piece, for providing the roller with a moving space;

[0011] When the roller is in the free state, both ends of the roller along its axial direction have gaps with the side baffle and the brake piece, for providing the roller with a moving space;

[0012] In the above-mentioned household appliance base support, the support frame comprises a rotating shaft arranged along the axial direction of the roller, the brake piece is movably connected to the rotating shaft, and both sides of the brake piece are provided with at least one roller, and the roller is movably sleeved on the rotating shaft.

[0013] In the above-mentioned household appliance base support, the brake piece comprises:

[0014] The first brake pad and the second brake pad, one end of the handle is provided with a driving part, the driving part is located between the first brake pad and the second brake pad, when the handle is rotated, the driving part is used to change the distance between the first brake pad and the second brake pad, when the first brake pad and the second brake pad are away from each other, the brake piece is switched to the expansion state, and the rollers on both sides of the brake piece are pressed between the brake piece and the support frame, so that the roller is in the locked state.

[0015] In the above-mentioned household appliance base support, the driving part is rotatably connected with the first brake pad, and the second brake pad movably abuts against the driving part.

[0016] The driving part comprises a first driving part and a second driving part, the distance from the first driving part to the rotation center of the handle is greater than the distance from the second driving part to the rotation center of the handle.

[0017] When the handle is rotated to make the first driving part abut against the second brake pad, the first brake pad and the second brake pad are away from each other, for switching the brake piece from the contraction state to the expansion state.

[0018] In the above-mentioned household appliance base support, the first driving part and the second driving part are arc-shaped and smoothly transitioned.

[0019] In the above-mentioned household appliance base support, the support frame is provided with at least two groups of rollers along its moving direction, the at least two groups of rollers are arranged on the support frame in a spaced manner and movably abut against the brake piece, and one group of rollers is located at the front end of the support frame and close to the driving part.

[0020] In the household appliance base support, the brake part further comprises a limiting block, the limiting block is arranged between the first brake pad and the second brake pad, and the limiting block is coaxially arranged with the roller set away from the front end of the support frame, so that when the brake part is switched to the expanded state, the roller group located at the front end of the support frame can be switched to the locked state.

[0021] In the household appliance base support, the roller comprises at least three rollers, and the at least three rollers are arranged in a T shape, two rollers are coaxially connected and arranged at the front end of the support frame and close to the driving part, and the third roller is away from the driving part, when the brake part is switched to the expanded state, the rollers on both sides of the brake part are pressed between the brake part and the support frame, and the third roller is pressed between the first brake pad and the second brake pad.

[0022] In the household appliance base support, the support frame comprises a cross frame and two longitudinal frames, the cross frame is bridged between the two longitudinal frames, so that the support frame is in a H shape, and the roller is movably arranged on the longitudinal frame.

[0023] The cross frame comprises a first part and a second part, the first part and the second part are slidably connected, so that the distance between the two longitudinal frames can be adjusted, the longitudinal frame comprises a third part and a fourth part, and the third part and the fourth part are slidably connected, so that the length of the longitudinal frame can be adjusted.

[0024] Compared with the prior art, the household appliance base support has the following beneficial effects:

[0025] (1) The state switching of the roller is realized by configuring the roller with a free state and a locked state and the brake part with a retracted state and an expanded state on the support frame, so that the brake structure is simpler, the cost is lower, and the operation is more convenient.

[0026] (2) The handle capable of switching the brake part from the retracted state to the expanded state is arranged at the front end of the support frame (i.e. the forward direction of the roller, and the direction of the operation panel of the washing machine), so that the operation of the handle is not affected by the installation position of the household appliance, and the handle can be designed to be long enough, so that the user can switch the state of the roller more easily.

[0027] (3) The first driving part and the second driving part with different distances from the rotation center of the handle are used to switch the brake part from the retracted state to the expanded state when the handle is rotated.

[0028] (4) The arc-shaped smooth transition between the first driving part and the second driving part is used for making the handle rotate more smoothly, so that the operator can more easily switch the state of the object support by rotating the handle. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of a household appliance base support of the present application;

[0030] Figure 2 is Figure 1 is a perspective view of the brake in the contracted state and the other in the expanded state;

[0031] Figure 3 is Figure 1 is a perspective view in the other direction;

[0032] Figure 4 is an exploded view of a local structure of a household appliance base support of the present application;

[0033] Figure 5 is a plan view of a household appliance base support of the present application;

[0034] Figure 6 is Figure 5 is an enlarged view of A in the figure;

[0035] Figure 7 is Figure 5 is an enlarged view of B in the figure;

[0036] Figure 8 is a plan view of the handle.

[0037] In the figure, 100, support frame; 110, side baffle; 120, rotating shaft; 130, horizontal frame; 131, first part; 132, second part; 140, vertical frame; 141, third part; 142, fourth part; 200, roller; 300, brake; 310, first brake pad; 320, second brake pad; 330, limiting block; 340, through hole; 400, handle; 410, first driving part; 420, second driving part; 430, main body; 500, gap; 600, rivet. DETAILED DESCRIPTION

[0038] The following is a specific embodiment of the present application and further describes the technical solution of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0040] As Figures 1 to 8 shown, the base support of the household appliance comprises a support frame 100, a roller 200, a brake 300, and a handle 400.

[0041] Specifically, the support frame 100 can be designed as a long strip structure, or as an I-shaped structure as shown. The upper surface of the I-shaped support frame 100 is provided with a support surface for supporting a washing machine, and is also applicable to supporting a refrigerator or other similar household appliances or any device with a certain weight and needing to switch between a moving state and a fixed state. For the sake of convenience, the following description will take the washing machine as an example. Preferably, rubber pads are connected to both sides of the I-shaped support frame 100, which are fixed to the support surface by adhesive means and located between the support frame 100 and the washing machine to increase the friction between them and ensure that the washing machine can be stably placed on the support frame 100.

[0042] Of course, the support frame 100 can be designed as a telescopic structure by means of sleeving, so as to adjust the effective bearing area of the support frame 100 according to the size of the washing machine, thereby enhancing the adaptability of the support frame 100 to different types of washing machines.

[0043] For example, in one embodiment, the support frame 100 comprises a cross frame 130 and two longitudinal frames 140, and the cross frame 130 is connected between the two longitudinal frames 140 to form an I-shaped support frame 100. The roller 200 is movably installed on the longitudinal frame 140. Further, the cross frame 130 is composed of a first part 131 and a second part 132, which are preferably long strips and are nested and slidably connected with each other, so that the distance between the two longitudinal frames 140 can be adjusted. The longitudinal frame 140 is composed of a third part 141 and a fourth part 142, which are also preferably long strips and are nested and slidably connected with each other to achieve the adjustability of the length of the longitudinal frame 140. Of course, only the length of the cross frame 130 or only the length of the longitudinal frame 140 can be adjusted, and at least one of the cross frame 130 and / or the longitudinal frame 140 is provided with three or more parts, which all belong to the protection scope of the present scheme.

[0044] The roller 200 is movably connected to the bottom of the support frame 100, i.e., the opposite side of the support surface. The roller 200 is designed to allow the support frame 100 to move on the support surface and has both locking and free rotating states. When the roller 200 is in the free state, the roller 200 can roll on the support surface, allowing the support frame 100 and the washing machine thereon to be conveniently moved; when the roller 200 is in the locked state, the roller 200 cannot roll on the support surface, so that the support frame 100 is fixed relative to the support surface, ensuring that the washing machine placed thereon is stably fixed at a designated position of a cabinet, a laundry room, or the like.

[0045] The brake 300 is movably mounted on the support frame 100 and movably abuts against the roller 200. The brake 300 is configured to drive the roller 200 to switch from the free rotating state to the locked state, thereby achieving the fixation of the support frame 100 on the support surface. The brake 300 has two states: a retracted state and an expanded state. When the brake 300 is in the expanded state, the brake 300 abuts against the roller 200, the roller 200 is in the locked state, the free rotation of the roller 200 is limited, and the roller 200 and the support frame 100 are kept stationary, so that the support frame 100 and the washing machine carried thereby are also kept fixed; when the brake 300 is switched to the retracted state, the brake 300 is separated from the roller 200, the roller 200 is switched to the free state, the free rotation of the roller 200 relative to the support frame 100 is not hindered, and the roller 200 is allowed to move along the support surface under force.

[0046] In the present scheme, the state switching of the roller 200 is achieved by configuring the roller 200 with the free state and the locked state on the support frame 100, and the brake 300 with the retracted state and the expanded state, so that the brake structure is simpler, the cost is lower, and the operation is more convenient; the functions of convenient movement and stable fixation of the washing machine carried on the support frame 100 are achieved.

[0047] The handle 400 is movably mounted in front of the support frame 100, and the handle 400 is in transmission connection with the brake 300 for driving the brake 300 to switch between the retracted state and the expanded state. In the present scheme, the front direction is defined as the advancing direction of the roller 200, which is consistent with the front of the washing machine. Such a layout is to place the handle 400 at one end of the support frame 100 in the moving direction, so that the handle 400 can be located outside the cabinet or on the side facing the opening of the cabinet when the washing machine on the support frame 100 is put into the cabinet, avoiding interference between the handle 400 and the cabinet during operation. In addition, this arrangement also means that the size of the handle 400 is not limited by the size of the cabinet, and the handle 400 can be designed to be large enough for the user to operate. The handle 400 is in transmission connection with the brake 300 for driving the brake 300 to switch between the retracted state and the expanded state.

[0048] In the scheme, the handle 400 capable of driving the brake piece 300 to switch between the retracted state and the expanded state is combined to realize convenient operation. Moreover, by arranging the handle 400 in front of the support frame 100 (i.e. in the forward direction of the rollers, and also in the direction of the operation panel of the washing machine), it is ensured that the operation of the handle 400 is not affected by the installation position of the washing machine, especially in the scenario where the washing machine is placed in a cabinet, and there is no space for operation on both sides, the advantages of the utility model are more obvious. In addition, the handle 400 can be designed to be long enough, so that the user is more labor-saving when switching the state of the roller.

[0049] In the scheme, the side of the support frame 100 facing the roller 200 is formed with a side baffle 110. The side baffle 110 serves as a mounting and supporting structure of the roller 200 on the support frame 100, and can be integrally formed with the support frame 100, or fixed to the support frame 100 by means of bolt connection or welding. When the roller 200 is mounted on the side baffle 110, the end face of the roller 200 should be slightly higher than the end face of the side baffle 110, so as to ensure that when the support frame 100 carries the washing machine, the roller 200 can effectively abut against the supporting plane (such as the ground).

[0050] When the roller 200 is installed in place, it is located between the side baffle 110 and the brake piece 300. In this configuration, when the roller 200 is in the free state, a certain gap 500 is reserved between the two ends of the roller 200 in the axial direction and the side baffle 110 and the brake piece 300, which provides the necessary movement space for the roller 200. Therefore, under the condition that the support frame 100 is stressed, the roller 200 can roll relative to the support frame 100, so as to realize the movement of the support frame 100 and the washing machine carried thereon.

[0051] When the roller 200 is switched to the locked state, the brake piece 300 is changed from the retracted state to the expanded state, and the roller 200 is slightly displaced relative to the support frame 100, so that the two ends of the roller 200 in the axial direction are in close contact with the side baffle 110 and the brake piece 300. In this way, the relative movement between the roller 200 and the support frame 100 is limited, so as to fix the entire support frame 100 and the washing machine carried thereon on the supporting plane.

[0052] Reference Figures 3 to 5In the embodiment, the support frame 100 comprises a rotating shaft 120 arranged along the axis direction of the rollers 200. The rotating shaft 120 serves as the rotating fulcrum of the rollers 200, and is used to realize the rotation of the rollers 200 relative to the support frame 100. The rotating shaft 120 is preferably in the form of a rivet 600, which is fixed on the support frame 100 by riveting. The roller 200 is provided with a shaft hole matched with the rivet 600 to ensure that it can be installed on the rotating shaft 120 and rotate therearound. Of course, the rotating shaft 120 can also be fixed on the support frame 100 by welding or bolt connection, depending on the design requirements and manufacturing process. The number of rotating shafts 120 can be one, and of course can also be more than two, and each rotating shaft 120 is provided with a group of rollers 200.

[0053] The brake 300 is also movably connected to the rotating shaft 120, and at least one roller 200 is arranged on each side of the brake 300 along the axis direction of the rotating shaft 120. This arrangement ensures that when the brake 300 is switched from the retracted state to the expanded state, at least one roller 200 on each side of the brake 300 can be simultaneously pushed from the free state to the locked state. The design of the brake 300 allows it to affect all the rollers 200 on its two sides during operation, thereby ensuring that all the rollers 200 can respond consistently to the action of the brake 300, achieving stable fixation of the support frame 100 and its load.

[0054] In the scheme, the brake 300 comprises a first brake pad 310 and a second brake pad 320, and one end of the handle 400 is provided with a driving portion located between the first brake pad 310 and the second brake pad 320. When the handle 400 is rotated, the driving portion is used to change the distance between the first brake pad 310 and the second brake pad 320. When the first brake pad 310 and the second brake pad 320 move away from each other, the brake 300 is switched to the expanded state, and the rollers 200 on both sides of the brake 300 are compressed between the brake 300 and the support frame 100, so that the rollers 200 are in the locked state.

[0055] The first brake pad 310 and the second brake pad 320 are movably connected to the rotating shaft 120. Preferably, the connection between the first brake pad 310, the second brake pad 320 and the rotating shaft 120 can be realized by providing through holes 340 on the first brake pad 310 and the second brake pad 320, which are sleeved on the outer wall of the rotating shaft 120. The first brake pad 310 is rotationally connected with the handle 400, and the second brake pad 320 is movably abutted with the handle 400. The rotational connection between the first brake pad 310 and the handle 400 can be realized by providing a perforation on the first brake pad 310 and the handle 400, and inserting a rivet 600 into the perforation.

[0056] When the handle 400 drives the brake piece 300 to switch from the contracted state to the expanded state, the second brake pad 320 is first pushed away from the first brake pad 310 by the handle 400. This action causes the second brake pad 320 to exert a reaction force on the first brake pad 310, prompting the first brake pad 310 to also move away from the second brake pad 320, thereby causing the entire brake piece 300 to switch from the contracted state to the expanded state. In this way, the rollers 200 on both sides of the brake piece 300 are respectively pressed tightly between the brake piece 300 and the support frame 100, causing the rollers 200 to switch from the free state to the locked state.

[0057] Similarly, when the handle 400 is actuated to cause the brake piece 300 to disengage from the expanded state, the force on the support frame 100 is transmitted to the rollers 200. Since the brake piece 300 no longer restricts the rollers 200 at this time, the rollers 200 can move along their axis relative to the support frame 100 while rolling, and through this movement, push the brake piece 300 to switch back to the contracted state.

[0058] Referring to Figures 5 to 8 , the driving part is rotationally connected to the first brake pad 310, and the second brake pad 320 is in movable abutment with the driving part. The driving part includes a first driving part 410 and a second driving part 420. The first driving part 410 and the second driving part 420 can be integrally formed with the handle 400, or can be installed on the handle 400 by means of bolt connection. Among them, the distance from the first driving part 410 to the rotation center of the handle 400 is greater than the distance from the second driving part 420 to the rotation center of the handle 400. This design ensures that when the handle 400 is rotated relative to the first brake pad 310, the first driving part 410 abuts against the second brake pad 320, which can push the first brake pad 310 and the second brake pad 320 away from each other, thereby causing the brake piece 300 to switch from the contracted state to the expanded state.

[0059] When the handle 400 is rotated so that the first driving part 410 abuts against the second brake pad 320, the first brake pad 310 and the second brake pad 320 move away from each other, for the brake piece 300 to switch from the contracted state to the expanded state, thereby causing the two ends of the roller 200 to be in close contact with the side baffle 110 and the brake piece 300, respectively.

[0060] When the handle 400 is rotated so that the second driving part 420 is directly opposite the second brake pad 320, and when the support frame 100 is subjected to a force and transmits this force to the roller 200, the roller 200 can move along its axis while rolling on the support plane, and through this movement, push the brake piece 300 to switch back to the contracted state, so that the roller 200 and the side baffle 110 have a gap 500, thereby allowing the roller 200 to rotate freely.

[0061] Preferably, the arc-shaped smooth transition between the first driving part 410 and the second driving part 420 is used to make the handle 400 rotate more smoothly relative to the first brake piece 310.

[0062] In one embodiment, the support frame 100 is provided with at least two groups of rollers 200 along the moving direction of the support frame 100. The at least two groups of rollers 200 are arranged at intervals on the support frame 100 and are in active abutment with the brake piece 300, so as to make the support frame 100 more stable during movement. One group of rollers 200 is located at the front end of the support frame 100 and is close to the driving part.

[0063] Referring to Figure 4 , Figure 6 and Figure 7 , the brake assembly further comprises a limiting block 330 arranged between the first brake piece 310 and the second brake piece 320 and coaxially arranged with the group of rollers 200 away from the front end of the support frame 100, so as to ensure that the group of rollers 200 located at the front end of the support frame 100 can be switched to the locked state when the brake piece 300 is switched to the open state.

[0064] The limiting block 330 is preferably sleeved on the outer periphery of the rotating shaft 120. When there are at least two groups of rollers 200, due to the rotational connection between the first brake piece 310 and the handle 400, the rollers 200 closer to the rotating center of the handle 400 are more likely to be switched to the locked state when the handle 400 rotates and drives the brake assembly to switch to the open state. The rollers 200 far away from the rotating center of the handle 400 are less likely to be switched to the locked state because the contact point is far away from the rotating center of the brake piece 300 and the handle 400, and the force transmitted to the group of rollers 200 is small. The limiting block 330 maintains a certain distance between the parts of the first brake piece 310 and the second brake piece 320 away from the rotating center of the handle 400. Thus, when the handle 400 rotates, the distance between the ends of the brake pieces away from each other can be ensured to decrease, thereby ensuring that the brake piece 300 can effectively drive all the rollers 200 to switch from the free state to the locked state even when there are at least two groups of rollers 200.

[0065] In another embodiment, there are at least three rollers 200, which are arranged in a T shape. Two rollers 200 are coaxially connected and arranged at the front end of the support frame 100 and close to the driving part, and the third roller 200 is away from the driving part. When the brake piece 300 is switched to the open state, the rollers 200 on both sides of the brake piece 300 are compressed between the brake piece 300 and the support frame 100, and the third roller 200 is compressed between the first brake piece 310 and the second brake piece 320.

[0066] In the embodiment, the limiting block 330 in the previous embodiment is replaced by the roller 200, and the rest of the structure does not change. The limiting block 330 can be not provided with any structure, or the roller 200 can be provided.

[0067] With reference to Figure 1 And Figure 8 The handle 400 includes a flat main body 430, and the first driving part 410 and the second driving part 420 are arranged at one end of the main body 430. The main body 430 has a length, and the extension direction of the length is consistent with the advancing direction of the support frame 100 when the roller rotates. The flat main body 430 is more in line with the shape of a human hand, and is convenient for the operator to drive the handle 400.

[0068] Further, when the brake piece 300 is in the expanded state, the main body 430 abuts against the end of the support frame 100, so as to provide a limit for the handle 400.

[0069] When the brake piece 300 is in the contracted state, the extension section of the main body 430 towards the first brake sheet 310 and the second brake sheet 320 is located between the first brake sheet 310 and the second brake sheet 320.

[0070] It should be noted that the description such as “first”, “second”, “one” and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features indicated, or implicitly indicating the number of the technical features indicated. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of “a plurality of” is at least two, for example, two, three, etc., unless otherwise specifically limited. The terms “connection”, “fixing” and the like should be understood in a broad sense, for example, “fixing” can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0072] The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or changes in the specific embodiments described herein can occur to those skilled in the art to which the application pertains without departing from the spirit of the application, and it is understood that such modifications or changes are to be considered as within the scope of the application as defined by the appended claims.

Claims

1. A base support for a domestic appliance, characterized in that, The utility model relates to a support frame (100) and a roller (200) which is movably connected to the support frame (100) and has a locked state and a free state, wherein the roller (200) can roll on a support plane when the roller (200) is in the free state, and the roller (200) cannot roll on the support plane when the roller (200) is in the locked state. The utility model further comprises a brake piece (300) which is movably arranged on the support frame (100) and movably abuts against the roller (200), wherein the brake piece (300) has a retracted state and an expanded state, wherein the brake piece (300) abuts against the roller (200) when the brake piece (300) is in the expanded state, and the roller (200) is in the locked state, and wherein the brake piece (300) is separated from the roller (200) when the brake piece (300) is switched to the retracted state, and the roller (200) is switched to the free state. The utility model further comprises a handle (400) which is movably arranged in front of the support frame (100), wherein the handle (400) is in driving connection with the brake piece (300) and is used to drive the brake piece (300) to switch between the retracted state and the expanded state. The support frame (100) is provided with a side baffle (110) on the side facing the roller (200), and the roller (200) is located between the side baffle (110) and the brake piece (300).

2. A base support for a domestic appliance as claimed in claim 1, characterised in that, When the roller (200) is in the free state, the roller (200) has a gap (500) with the side baffle (110) and the brake piece (300) at both ends in the axial direction of the roller (200), so as to provide a movement space for the roller (200).

3. A base support for a domestic appliance as claimed in claim 1, characterised in that, When the roller (200) is in the locked state, the roller (200) abuts tightly against the side baffle (110) and the brake piece (300) at both ends in the axial direction of the roller (200), so as to fix the roller (200) relative to the support frame (100). The support frame (100) comprises a rotating shaft (120) which is arranged in the axial direction of the roller (200), the brake piece (300) is movably connected to the rotating shaft (120), and at least one roller (200) is arranged on each side of the brake piece (300), and the roller (200) is movably sleeved on the rotating shaft (120). The brake piece (300) comprises:

4. A base support for an electric household appliance according to claim 1, characterized in that, ​ 5. A base support for an electric household appliance according to claim 4, characterized in that ​ The first brake pad (310) and the second brake pad (320), one end of the handle (400) is provided with a driving part, the driving part is located between the first brake pad (310) and the second brake pad (320), when rotating the handle (400), the driving part is used to change the distance between the first brake pad (310) and the second brake pad (320), when the first brake pad (310) and the second brake pad (320) are away from each other, the brake piece (300) is switched to the expansion state, the rollers (200) on both sides of the brake piece (300) are compressed between the brake piece (300) and the support frame (100), so that the rollers (200) are in the locked state.

6. A base support for an electric household appliance according to claim 5, characterized in that The driving part is rotatably connected with the first brake pad (310), and the second brake pad (320) is movably abutted with the driving part; The driving part includes a first driving part (410) and a second driving part (420), and the distance from the first driving part (410) to the rotation center of the handle (400) is greater than the distance from the second driving part (420) to the rotation center of the handle (400); When the handle (400) rotates to make the first driving part (410) abut against the second brake pad (320), the first brake pad (310) and the second brake pad (320) are away from each other, for switching the brake piece (300) from the contraction state to the expansion state.

7. A base support for an electric household appliance according to claim 6, characterized in that The first driving part (410) and the second driving part (420) are arc-shaped and smoothly transitioned.

8. A base support for an electric household appliance according to claim 5, characterized in that, The support frame (100) is provided with at least two groups of rollers (200) along the moving direction thereof, the at least two groups of rollers (200) are spaced apart on the support frame (100) and movably abut against the brake piece (300), and one group of rollers is located at the front end of the support frame (100) and close to the driving part.

9. A base support for an electric household appliance according to claim 8, characterized in that The brake piece (300) further includes a limiting block (330), the limiting block (330) is arranged between the first brake pad (310) and the second brake pad (320), and the limiting block (330) is coaxially arranged with the roller (200) group away from the front end of the support frame (100), for ensuring that when the brake piece (300) is switched to the expansion state, the group of rollers (200) located at the front end of the support frame (100) can be switched to the locked state.

10. A base support for a domestic appliance as claimed in any one of claims 5 to 7, characterised in that, The rolling wheels (200) include at least three, at least three rolling wheels (200) are distributed in "T" shape, two rolling wheels (200) are coaxially connected and arranged at the front end of the support frame (100) and close to the driving part, the third rolling wheel (200) is away from the driving part, when the brake part (300) is switched to the expansion state, the rolling wheels (200) on both sides of the brake part (300) are compressed between the brake part (300) and the support frame (100), and the third rolling wheel (200) is compressed between the first brake pad (310) and the second brake pad (320).

11. A base support for a domestic appliance as claimed in claim 10, characterized in that: The support frame (100) includes a cross frame (130) and two longitudinal frames (140), the cross frame (130) is bridged between the two longitudinal frames (140), so that the support frame (100) is "H" shaped, and the rolling wheels are movably arranged on the longitudinal frames (140); The cross frame (130) includes a first part (131) and a second part (132), the first part (131) and the second part (132) are slidably connected, so that the distance between the two longitudinal frames (140) is adjustable, and the longitudinal frame (140) includes a third part (141) and a fourth part (142), the third part (141) and the fourth part (142) are slidably connected, so that the length of the longitudinal frame (140) is adjustable.

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