Foot module and refrigerator

Abstract

The present invention relates to the field of refrigerators, and relates to a foot module and a refrigerator. The foot module includes a foot module, and the foot module includes a base body, a front wheel structure and a rear wheel structure; the front wheel structure includes a front wheel assembly, a front wheel limiting assembly, a supporting foot and a foot adjusting assembly; the front wheel assembly includes a front wheel and a steering support; the front wheel limiting assembly includes a fixing member and a limiting member, the fixing member is arranged on the steering support, the limiting member is detachably connected with the fixing member, in a limiting state, the limiting member is in limiting cooperation with the base body, and is in limiting cooperation with at least one of the steering support and the fixing member to limit the steering freedom degree of the steering support; the output end of the foot adjusting assembly is connected with the supporting foot; the rear wheel structure includes a rear wheel assembly and a rear wheel adjusting assembly, and the output end of the rear wheel adjusting assembly is connected with the rear wheel assembly. The present invention solves the defects that when adjusting the gap between the refrigerator and the kitchen cabinet in the prior art, it is easy to apply too much pressure on the kitchen cabinet, resulting in deformation or damage of the kitchen cabinet, and the position of the refrigerator cannot be effectively and accurately adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and particularly to a foot module and a refrigerator. Background Art

[0002] An embedded refrigerator is a refrigerator designed to be integrated with a kitchen cabinet. It is usually installed in the cabinet to achieve a more tidy, unified and beautiful effect. Since the refrigerator is located in the cabinet, in order to achieve a better aesthetic effect, the gap between the refrigerator and the cabinet is particularly important within a suitable range.

[0003] In the prior art, to solve the above problems, the industry generally pre-installs corresponding mechanisms on the refrigerator to adjust the gap between the refrigerator and the cabinet. However, most of the cabinets of embedded refrigerators are made of wood and lack sufficient supporting force. When the existing adjustment mechanisms adjust the gap between the refrigerator and the cabinet, the pressure exerted on the cabinet is relatively large, which easily causes the cabinet to deform or break. Summary of the Invention

[0004] The present invention provides a foot module and a refrigerator to solve the defects that the existing adjustment device is prone to exert too much pressure on the cabinet when adjusting the gap between the refrigerator and the cabinet, resulting in deformation or damage of the cabinet, and it is impossible to effectively and accurately adjust the position of the refrigerator.

[0005] On the one hand, the present invention provides a foot module, including: a foot module, which is configured to be arranged at the bottom of the refrigerator cabinet. The foot module includes: a seat body, a front wheel structure and a rear wheel structure;

[0006] The front wheel structure includes a front wheel assembly, a front wheel limit assembly, a supporting foot and a foot adjustment assembly.

[0007] The front wheel assembly includes a front wheel and a steering support. The front wheel is rotatably connected to the steering support, and the steering support is rotatably connected to the seat body.

[0008] The front wheel limit assembly includes a fixing member and a limiting member. The fixing member is arranged on the steering support, and the limiting member is detachably connected to the fixing member. In the limiting state, the limiting member is in limiting cooperation with the seat body and is in limiting cooperation with at least one of the steering support and the fixing member to limit the steering freedom degree of the steering support.

[0009] The foot adjustment assembly is arranged on the seat body, and the output end of the foot adjustment assembly is connected to the supporting foot to adjust the extending length of the supporting foot relative to the seat body.

[0010] The rear wheel structure includes a rear wheel assembly and a rear wheel adjustment assembly.

[0011] The rear wheel adjusting assembly is disposed on the seat body, and an output end of the rear wheel adjusting assembly is connected to the rear wheel assembly to adjust an extending length of the rear wheel assembly relative to the seat body.

[0012] According to the foot module provided by the present invention, in a limiting state, the limiting member is in limiting cooperation with the seat body, and is also in limiting cooperation with the steering support and the fixing member to limit a steering freedom degree of the steering support.

[0013] According to the foot module provided by the present invention, the limiting member includes a first limiting portion, a second limiting portion and a third limiting portion which are sequentially connected. The first limiting portion is detachably connected to the fixing member; the first limiting portion is provided with a first card slot, the seat body is provided with a second card slot, and one side of the steering support facing the limiting member is provided with an abutting surface; in the limiting state, the first limiting portion is in clamping cooperation with the fixing member, the second limiting portion is in clamping cooperation with the second card slot, and the third limiting portion is in abutting cooperation with the abutting surface.

[0014] According to the foot module provided by the present invention, the fixing member passes through the first card slot; in the limiting state, a top of the first card slot contacts the fixing member, and / or a bottom of the second limiting portion contacts a bottom of the second card slot.

[0015] According to the foot module provided by the present invention, a height of the first card slot is greater than or equal to a height of the second card slot, and the height of the second card slot is greater than or equal to a height of the third limiting portion.

[0016] According to the foot module provided by the present invention, an inner wall of the third limiting portion is in limiting cooperation with an inner wall of the seat body.

[0017] According to the foot module provided by the present invention, the seat body is provided with a fourth limiting portion and a fifth limiting portion. The fourth limiting portion is used for limiting a maximum steering angle of the front wheel assembly in a first direction, and the fifth limiting portion is used for limiting a maximum steering angle of the front wheel assembly in a second direction.

[0018] According to the foot module provided by the present invention, the front wheel assembly further includes a rotating shaft, the front wheel is rotatably sleeved on the rotating shaft, and the fixing member is integrally provided with the rotating shaft.

[0019] According to the foot module provided by the present invention, there are two such foot modules, and the two foot modules are configured to be symmetrically disposed on two sides of a bottom of a refrigerator cabinet.

[0020] According to the foot module provided by the present invention, the foot adjusting assembly includes a first worm gear, a first worm, a first screw rod, and a first threaded seat. The first worm gear and the first worm are both rotatably connected to the seat body. The first threaded seat is fixedly connected to the seat body. The first worm gear is engaged with the first worm. One end of the first screw rod is connected to the supporting foot. The first worm gear is sleeved on the first screw rod and can drive the first screw rod to rotate. And the first screw rod is in vertical sliding fit with the first worm gear. The first screw rod is threadedly connected to the first threaded seat. The rear wheel adjusting assembly includes a second worm gear, a second worm, a second screw rod, and a second threaded seat. The second worm gear and the second worm are both rotatably connected to the seat body. The second threaded seat is fixedly connected to the seat body. The second worm gear is engaged with the second worm. One end of the second screw rod is connected to the rear wheel assembly. The second worm gear is sleeved on the second screw rod and can drive the second screw rod to rotate. And the second screw rod is in vertical sliding fit with the second worm gear. The second screw rod is threadedly connected to the second threaded seat.

[0021] According to the foot module provided by the present invention, the foot adjusting assembly further includes a first adjusting member. The first adjusting member is connected to the first worm. The first adjusting member is provided with a first engaging portion. The first engaging portion is used for connecting with an adjusting component to drive the first adjusting member to rotate. The rear wheel adjusting assembly further includes a second adjusting member. The second adjusting member is connected to the second worm. The second adjusting member is provided with a second engaging portion. The second engaging portion is used for connecting with an adjusting component to drive the second adjusting member to rotate.

[0022] According to the foot module provided by the present invention, both the first engaging portion and the second engaging portion are located on the same side of the seat body.

[0023] On the other hand, the present invention provides a refrigerator, including: a box body and the foot module according to any one of the above. The foot module is arranged at the bottom of the box body.

[0024] The foot module provided by the present invention is applied to a refrigerator, which can easily adjust the gap between the refrigerator and the kitchen cabinet, prevent excessive pressure on the kitchen cabinet during the centering adjustment of the refrigerator, and ensure the stability of the refrigerator in the kitchen cabinet without displacement after the adjustment. When in use, the foot module is arranged at the bottom of the refrigerator body. In the initial state, the front wheel limiting component is in a limiting state. The limiting member can limit the steering support of the front wheel assembly by limiting cooperation with the seat body and at least one of the steering support and the fixing member, so that it cannot turn left and right. Thus, the refrigerator can move stably along the depth direction of the kitchen cabinet. After the refrigerator is pushed into the kitchen cabinet, the limiting member can be removed to release the limiting cooperation with the seat body and the limiting cooperation with the steering support and / or the fixing member, so that the steering support resumes the freedom of turning left and right. At this time, the orientation of the front wheel assembly can be adjusted. After the orientation adjustment is completed, the left and right gaps between the refrigerator and the kitchen cabinet can be easily adjusted, and the refrigerator can be prevented from applying excessive pressure on the kitchen cabinet, resulting in damage to the kitchen cabinet wall. After the left and right positions of the refrigerator are adjusted, the height of the front and rear parts of the refrigerator can be adjusted by using the foot adjustment component and the rear wheel adjustment component respectively, so as to adjust the gap between the top of the refrigerator and the kitchen cabinet. After the adjustment is completed, the front part of the refrigerator is supported by the supporting feet, so that the refrigerator can maintain a stable position in the kitchen cabinet without displacement.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a schematic diagram of the foot module provided by an embodiment of the present invention.

[0028] Figure 2 is one of the schematic diagrams of the foot module in the foot module provided by an embodiment of the present invention.

[0029] Figure 3 is another schematic diagram of the foot module in the foot module provided by an embodiment of the present invention.

[0030] Figure 4 is the third schematic diagram of the foot module in the foot module provided by an embodiment of the present invention.

[0031] Figure 5 is a schematic diagram of the front wheel assembly in the foot module provided by an embodiment of the present invention in a limiting state.

[0032] Figure 6 It is a schematic diagram when the front wheel assembly in the foot module provided by the embodiment of the present invention is in a state of releasing the limit.

[0033] Figure 7 It is a schematic diagram of the limiting member in the foot module provided by the embodiment of the present invention.

[0034] Figure 8 It is a schematic diagram after the front wheel assembly in the foot module provided by the embodiment of the present invention adjusts the steering.

[0035] Figure 9 It is a schematic diagram of the foot adjusting assembly and the rear wheel adjusting assembly in the foot module provided by the embodiment of the present invention.

[0036] Figure 10 It is a schematic diagram of the foot adjusting assembly in the foot module provided by the embodiment of the present invention.

[0037] Figure 11 It is a schematic diagram of the rear wheel adjusting assembly in the foot module provided by the embodiment of the present invention.

[0038] Figure 12 It is a schematic diagram of the rear wheel assembly in the foot module provided by the embodiment of the present invention.

[0039] Reference signs:

[0040] 100, seat body; 110, base; 120, upper cover; 130, second card slot; 140, fourth limiting part; 150, fifth limiting part.

[0041] 200, front wheel structure; 210, front wheel assembly; 211, front wheel; 212, steering support; 213, abutting surface; 214, rotating shaft; 220, front wheel limiting assembly; 221, fixing member; 222, limiting member; 2221, first limiting part; 2222, second limiting part; 2223, third limiting part; 2224, first card slot; 230, supporting foot; 240, foot adjusting assembly; 241, first worm gear; 242, first worm; 243, first screw; 244, first thread seat; 245, first protective shell; 246, first adjusting member; 247, first engaging part.

[0042] 300, rear wheel structure; 310, rear wheel assembly; 311, rear wheel; 312, rear wheel support; 3121, first rear wheel support; 3122, second rear wheel support; 320, rear wheel adjusting assembly; 321, second worm gear; 322, second worm; 323, second screw; 324, second thread seat; 325, second protective shell; 326, second adjusting member; 327, second engaging part. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0044] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0046] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0047] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] The following Figures 1 to 12 describes the foot module and the refrigerator provided by the present invention.

[0049] Referring to Figures 1 to 6 As shown, the foot module provided by the embodiment of the present invention includes: a foot module, which is configured to be disposed at the bottom of the refrigerator body, and the foot module includes a seat body 100, a front wheel structure 200, and a rear wheel structure 300.

[0050] The front wheel structure 200 includes a front wheel assembly 210, a front wheel limiting assembly 220, a support foot 230, and a foot adjusting assembly 240.

[0051] The front wheel assembly 210 includes a front wheel 211 and a steering support 212. The front wheel 211 is rotatably connected to the steering support 212, and the steering support 212 is rotatably connected to the seat body 100.

[0052] The front wheel limiting assembly 220 includes a fixing member 221 and a limiting member 222. The fixing member 221 is disposed on the steering support 212, and the limiting member 222 is detachably connected to the fixing member 221. In the limiting state, the limiting member 222 is in limiting cooperation with the seat body 100, and is in limiting cooperation with at least one of the steering support 212 and the fixing member 221 to limit the steering freedom degree of the steering support 212.

[0053] The foot adjusting assembly 240 is disposed on the seat body 100, and the output end of the foot adjusting assembly 240 is connected to the support foot 230 to adjust the protruding length of the support foot 230 relative to the seat body 100.

[0054] The rear wheel structure 300 includes a rear wheel assembly 310 and a rear wheel adjusting assembly 320. The rear wheel adjusting assembly 320 is disposed on the seat body 100, and the output end of the rear wheel adjusting assembly 320 is connected to the rear wheel assembly 310 to adjust the protruding length of the rear wheel assembly 310 relative to the seat body 100.

[0055] The foot module provided by the present invention is applied to a refrigerator, which can easily adjust the gap between the refrigerator and the kitchen cabinet, prevent the kitchen cabinet from being subjected to excessive pressure during the centering adjustment of the refrigerator, and ensure that the refrigerator remains stable in the kitchen cabinet without displacement after the adjustment. It solves the defects of the existing adjustment device that when adjusting the gap between the refrigerator and the kitchen cabinet, it is easy to apply excessive pressure to the wooden kitchen cabinet, resulting in deformation or damage of the kitchen cabinet, and it is impossible to effectively and accurately adjust the position of the refrigerator.

[0056] When in use, two foot modules are symmetrically arranged on both sides of the bottom of the refrigerator body. Refer to Figure 5 As shown, in the initial state, the front wheel limiting component 220 is in a limiting state. The limiting member 222 can limit the steering support 212 of the front wheel assembly 210 through limiting cooperation with the seat body 100 and at least one of the steering support 212 and the fixing member 221, so that it cannot turn left and right. Thus, the refrigerator can move stably along the depth direction of the kitchen cabinet. Refer to Figure 6 As shown, after the refrigerator is pushed into the kitchen cabinet, the limiting member 222 can be removed, the limiting cooperation with the seat body 100 can be released, and the limiting cooperation with the steering support 212 and / or the fixing member 221 can be released, so that the steering support 212 resumes the freedom of turning left and right. At this time, the orientation of the front wheel assembly 210 can be adjusted (refer to Figure 8 As shown) (if the refrigerator is heavy, the front part of the refrigerator can be lifted by using the supporting foot 230 first to make the front wheel assembly 210 suspended, and then the orientation of the front wheel assembly 210 can be adjusted). After the orientation adjustment is completed, the left and right gaps between the refrigerator and the kitchen cabinet can be easily adjusted, and it can prevent the refrigerator from applying excessive pressure to the kitchen cabinet, resulting in damage to the kitchen cabinet wall. After the left and right positions of the refrigerator are adjusted, the height of the front and rear parts of the refrigerator can be adjusted respectively by using the foot adjustment component 240 and the rear wheel adjustment component 320, so as to adjust the gap between the top of the refrigerator and the kitchen cabinet. After the adjustment is completed, the front part of the refrigerator is supported by the supporting foot 230, so that the refrigerator can maintain a stable position in the kitchen cabinet without displacement.

[0057] Specifically, the foot module provided by the present invention includes two foot modules arranged symmetrically left and right. The two foot modules are respectively used to support the left and right sides of the bottom of the refrigerator body, and the roller arrangement of the two foot modules can facilitate the movement of the refrigerator. Of course, in some embodiments, the number of foot modules can also be single or more than two, and no limitation is made thereto.

[0058] Among them, the foot module includes a seat body 100, a front wheel structure 200 and a rear wheel structure 300. The seat body 100 is used for installing and fixing the front wheel structure 200 and the rear wheel structure 300. When in use, the seat body 100 is connected to the bottom of the refrigerator body. Among the two foot modules, the front wheel structure 200 is used to support the front part of the refrigerator (the side where the refrigerator door body is located), and the rear wheel structure 300 is used to support the rear part of the refrigerator.

[0059] The front-wheel structure 200 includes a front-wheel assembly 210, a front-wheel limit assembly 220, a support foot 230, and a foot adjustment assembly 240. The front-wheel assembly 210 is used to support the front part of the refrigerator when it is moved and reduce the moving resistance by means of the front wheels 211. The front-wheel limit assembly 220 is used to limit the front-wheel assembly 210 to define the left-right steering freedom degree of the front-wheel assembly 210. The support foot 230 is used to support the front part of the refrigerator when it is fixed. The foot adjustment assembly 240 is used to adjust the protruding length of the support foot 230 relative to the seat body 100, thereby adjusting the height of the front part of the refrigerator.

[0060] The front-wheel assembly 210 includes a front wheel 211 and a steering support 212. The front wheel 211 is rotatably connected to the steering support 212 so that the front wheel 211 can roll relative to the steering support 212, facilitating the movement of the refrigerator. The steering support 212 is rotatably connected to the seat body 100 so that the steering support 212 can drive the front wheel 211 to turn left and right, facilitating the adjustment of the left-right movement orientation of the refrigerator.

[0061] The front-wheel limit assembly 220 includes a fixing member 221 and a limiting member 222. The fixing member 221 is arranged on the steering support 212, so that the fixing member 221 can move synchronously when the steering support 212 turns left and right. The limiting member 222 is detachably connected to the fixing member 221 (such as snap connection, plug connection, screw connection, etc.). When it is necessary to release the restriction on the front-wheel assembly 210, the limiting member 222 is removed from the fixing member 221. In the limiting state, the limiting member 222 is in limiting cooperation with the seat body 100, so that the limiting member 222 cannot rotate relative to the seat body 100. At the same time, the limiting member 222 is in limiting cooperation with at least one of the steering support 212 and the fixing member 221 to limit the steering freedom degree of the steering support 212.

[0062] It should be noted that the limiting member 222 is in limiting cooperation with at least one of the steering support 212 and the fixing member 221, which means that the limiting member 222 can be in limiting cooperation with the steering support 212 alone, or in limiting cooperation with the fixing member 221 alone, or in limiting cooperation with both the steering support 212 and the fixing member 221. Since the limiting member 222 is in limiting cooperation with the seat body 100 and cannot rotate relative to the seat body 100, when the limiting member 222 is in limiting cooperation with the steering support 212 and / or the fixing member 221, the steering support 212 cannot turn left and right relative to the seat body 100, thereby limiting the steering freedom degree of the steering support 212.

[0063] The supporting feet 230 are vertically arranged on the base 100 and can move vertically relative to the base 100. The output end of the foot adjustment component 240 is connected to the supporting feet 230 to drive the supporting feet 230 to move in a direction away from or close to the base 100, thereby adjusting the rise or fall of the front part of the refrigerator. For example, when the foot adjustment component 240 drives the supporting feet 230 to move in a direction away from the base 100, it can drive the front part of the refrigerator to rise and reduce the gap between the top of the refrigerator and the cabinet. Correspondingly, when the foot adjustment component 240 drives the supporting feet 230 to move in a direction close to the base 100, it can drive the front part of the refrigerator to fall and increase the gap between the top of the refrigerator and the cabinet.

[0064] The foot adjustment component 240 can be implemented in a variety of well-known ways in the prior art, such as rotary adjustment, hydraulic adjustment or electric adjustment, etc. Among them, rotary adjustment drives the supporting feet 230 to extend or retract relative to the base 100 through a threaded mechanism by rotating an adjustment knob or nut, thereby adjusting the height of the front part of the refrigerator. Hydraulic adjustment uses a hydraulic system to adjust the extension or retraction of the supporting feet 230 relative to the base 100, and realizes the precise lifting and lowering of the front part of the refrigerator by controlling the pressure of the hydraulic device. Electric adjustment uses an electric drive system, and drives a screw or a guide rail system through a motor to precisely control the extension or retraction of the supporting feet 230 relative to the base 100, thereby adjusting the height of the front part of the refrigerator.

[0065] Of course, the foot adjustment component 240 can also adopt other forms well-known in the prior art, and no limitation is made thereto.

[0066] The rear wheel structure 300 includes a rear wheel assembly 310 and a rear wheel adjustment component 320. The rear wheel assembly 310 is used to support the rear part of the refrigerator and reduce the moving resistance by using the rear wheels 311. The rear wheel assembly 310 includes rear wheels 311 and rear wheel supports 312. The rear wheels 311 are rotatably connected to the rear wheel supports 312 so that the rear wheels 311 can roll relative to the rear wheel supports 312, facilitating the movement of the refrigerator. The rear wheel supports 312 are fixedly connected to the base 100 so that the rear wheels 311 can always roll along the front-rear direction of the refrigerator. In the rear wheel assembly 310, the number of the rear wheels 311 can be single or multiple, and no limitation is made thereto.

[0067] See Figure 12As shown, by way of example, in this embodiment, the rear wheel assembly 310 includes a first rear wheel support 3121, a second rear wheel support 3122, and a plurality of rear wheels 311 that are parallel and spaced apart. The plurality of rear wheels 311 are all rotatably connected to the first rear wheel support 3121. The bottoms of all the rear wheels are coplanar. The second rear wheel support 3122 is rotatably connected to the first rear wheel support 3121, and the rotation axis of the second rear wheel support 3122 and the first rear wheel support 3121 is located between the plurality of rear wheels 311 that are spaced apart. The second rear wheel support 3122 is connected to the seat body 100.

[0068] With the above arrangement, the rear wheel assembly 310 can ensure that the bottoms of the plurality of rear wheels 311 that are parallel and spaced apart can all effectively contact the ground, thereby effectively dispersing the pressure on the ground, preventing the ground from being overly pressured to produce indentations or damage, and reducing the requirements for the processing precision and assembly precision of the rear wheel assembly 310.

[0069] During operation, the rear wheel assembly 310 is connected to the seat body 100, and the weight of the refrigerator is transmitted to the first rear wheel support 3121 through the second rear wheel support 3122 and then to each rear wheel 311. Since the second rear wheel support 3122 is rotatably connected to the first rear wheel support 3121, and the rotation axis of the second rear wheel support 3122 and the first rear wheel support 3121 is located between the plurality of rear wheels 311 that are spaced apart, when the refrigerator applies pressure to the rear wheel assembly 310, the first rear wheel support 3121 can make a slight rotation relative to the second rear wheel support 3122, driving each rear wheel 311 to rotate relative to the second rear wheel support 3122 following the first rear wheel support 3121, and enabling the rear wheels 311 on both sides of the rotation connection point between the second rear wheel support 3122 and the first rear wheel support 3121 to all effectively contact the ground, thereby effectively dispersing the pressure on the ground. And when moving the refrigerator, the first rear wheel support 3121 can also make a slight rotation relative to the second rear wheel support 3122, enabling each rear wheel 311 to always closely adhere to the ground and dispersing the pressure on the ground.

[0070] In addition, since there may be processing errors in the various components of the rear wheel assembly 310 and there may be assembly errors when the rear wheel assembly 310 is assembled with the refrigerator, when the refrigerator applies pressure, the slight rotation of the first rear wheel support 3121 relative to the second rear wheel support 3122 can automatically compensate for these errors, thereby reducing the requirements for the processing precision and assembly precision of the rear wheel assembly 310.

[0071] Similarly, the rear wheel adjustment assembly 320 can also be implemented in a variety of well-known ways in the prior art, such as rotary adjustment, hydraulic adjustment, or electric adjustment, etc. Similar to the foot adjustment assembly 240, details are not repeated here. The only difference between the two is that the foot adjustment assembly 240 is used to drive the support feet 230 to move in a direction away from or closer to the seat body 100, while the rear wheel adjustment assembly 320 is used to drive the rear wheel support 312 to move in a direction away from or closer to the seat body 100.

[0072] And thus, it can be seen that for the foot module provided by the present invention, the foot adjustment assemblies 240 in the two foot modules can independently adjust the heights of the left and right sides of the front of the refrigerator, and the rear wheel adjustment assemblies 320 in the two foot modules can independently adjust the heights of the left and right sides of the rear of the refrigerator, improving the flexibility of the refrigerator height adjustment and being able to adapt to different cabinet heights and different flatness of the ground.

[0073] See Figures 2 to 4 As shown, the seat body 100 includes a base 110 and an upper cover 120. The base 110 and the upper cover 120 are snap-connected, and an installation space for installing and fixing the front wheel structure 200 and the rear wheel structure 300 is formed between the base 110 and the upper cover 120.

[0074] See Figure 5 As shown, according to some embodiments of the present invention, in the limiting state, the limiting member 222 is in limiting cooperation with the seat body 100, and is also in limiting cooperation with both the steering support 212 and the fixing member 221 to limit the steering freedom degree of the steering support 212.

[0075] In the limiting state, by setting the limiting member 222 to be in limiting cooperation with the seat body 100, and setting the limiting member 222 to be in limiting cooperation with both the steering support 212 and the fixing member 221, the stability of the steering support 212 in the limiting state can be improved, and it can prevent excessive force on a single limiting cooperation position, extending the service life of the assembly.

[0076] Specifically, see Figure 5 As shown, in the limiting state, one side of the limiting member 222 is in limiting cooperation with the side wall of the steering support 212, the middle part of the limiting member 222 is in limiting cooperation with the seat body 100, and the other side of the limiting member 222 is in limiting cooperation with the fixing member 221. Under the action of the two limiting cooperations, the limiting member 222 can effectively fix the position of the steering support 212 and limit its steering freedom degree. Through the design of the two limiting cooperations, the force applied to the limiting member 222 can be evenly dispersed, avoiding excessive pressure on a single limiting position, resulting in damage or failure.

[0077] See Figures 5 to 7As shown, according to some embodiments of the present invention, the limiting member 222 includes a first limiting portion 2221, a second limiting portion 2222 and a third limiting portion 2223 which are connected in sequence, and the first limiting portion 2221 is detachably connected to the fixing member 221; the first limiting portion 2221 is provided with a first card slot 2224, the seat body 100 is provided with a second card slot 130, and a contact surface 213 is provided on the side of the steering support 212 facing the limiting member 222; in the limited state, the first limiting portion 2221 is snap-fitted with the fixing member 221, the second limiting portion 2222 is snap-fitted with the second card slot 130, and the third limiting portion 2223 is abutted with the abutment surface 213.

[0078] By setting the limiting member 222 to the above-mentioned structural form including the first limiting portion 2221, the second limiting portion 2222 and the third limiting portion 2223 connected in sequence, and correspondingly arranging matching limiting structures on the first limiting portion 2221, the seat body 100 and the steering support 212, the limiting structure of the front wheel assembly 210 can be simple, the limiting stability is strong, and it has the advantages of easy configuration of the limit and release of the limit.

[0079] Specifically, the limiting member 222 is connected in sequence by a first limiting portion 2221, a second limiting portion 2222 and a third limiting portion 2223, and is simple in design and easy to manufacture (for example, it can be formed by bending a block of metal). The first limiting portion 2221 is engaged with the fixing member 221, the second limiting portion 2222 is engaged with the second slot 130, and the third limiting portion 2223 cooperates with the abutting surface 213 of the steering support 212, effectively ensuring that the steering support 212 is stably fixed in the limited state to prevent rotation or displacement. Through the multi-point engagement and abutment design, the force can be dispersed, excessive pressure on a single position can be prevented, and the stability of the limit can be enhanced.

[0080] As an example, in this embodiment, the first limiting portion 2221 and the second limiting portion 2222 are vertically connected to each other, the second limiting portion 2222 and the third limiting portion 2223 are vertically connected to each other, and the first limiting portion 2221 and the third limiting portion 2223 are parallel to each other, so that the limiting member 222 is an inverted U-shape as a whole. Of course, in some embodiments, the first limiting portion 2221 and the second limiting portion 2222, the second limiting portion 2222 and the third limiting portion 2223 can also be connected at other angles, as long as they can meet the limiting requirements of the front wheel assembly 210, and this is not limited.

[0081] See also Figures 5 to 7 As shown, according to some embodiments of the present invention, the fixing member 221 is inserted into the first slot 2224 ; in the limited state, the top of the first slot 2224 contacts the fixing member 221 , and / or the bottom of the second limiting portion 2222 contacts the bottom of the second slot 130 .

[0082] By passing the fixing member 221 through the first card slot 2224 in the limited state and making the top of the first card slot 2224 contact the fixing member 221, and / or making the bottom of the second limiting portion 2222 contact the bottom of the second card slot 130, the disassembly and assembly difficulty of the limiting member 222 can be reduced, and the stability of the limiting member 222 in the limited state can be improved.

[0083] Specifically, in the limited state, when the top of the first card slot 2224 contacts the fixing member 221, and / or the bottom of the second limiting portion 2222 contacts the bottom of the second card slot 130, the fixing member 221 and / or the seat body 100 can be used to support the limiting member 222, reducing the loosening or displacement of the limiting member 222 caused by external force or vibration, and enhancing the limiting and fixing ability of the limiting member 222.

[0084] It should be noted that in the fixed state, it can be that the top of the first card slot 2224 contacts the fixing member 221, or the bottom of the second limiting portion 2222 contacts the bottom of the second card slot 130, or it can be that the top of the first card slot 2224 contacts the fixing member 221 while the bottom of the second limiting portion 2222 contacts the bottom of the second card slot 130.

[0085] See Figures 5 to 7 As shown, according to some embodiments of the present invention, the height of the first card slot 2224 is greater than or equal to the height of the second card slot 130, and the height of the second card slot 130 is greater than or equal to the height of the third limiting portion 2223.

[0086] By setting the height of the first card slot 2224 to be greater than or equal to the height of the second card slot 130 and setting the height of the second card slot 130 to be greater than or equal to the height of the third limiting portion 2223, it is convenient to disassemble and assemble the limiting member 222, and the operation difficulty when the front wheel assembly 210 is limited or the limit is released is reduced.

[0087] It should be noted that the heights of the first card slot 2224, the second card slot 130, and the third limiting portion 2223 are all vertical heights.

[0088] Specifically, when limiting the front wheel assembly 210, one end of the fixing member 221 can first pass through the first card slot 2224 on the first limiting portion 2221, and the fixing member 221 is located at the middle and lower position of the first card slot 2224. Then, the third limiting portion 2223 passes through the second card slot 130 on the seat body 100, and then the limiting member 222 is released to fall under the action of gravity. At this time, the outer wall of the third limiting portion 2223 can abut against the side wall of the steering support 212 to form a limiting fit, and the two side walls of the second limiting portion 2222 can respectively contact the two side walls of the second card slot 130 to form a limiting fit. The bottom of the second limiting portion 2222 can overlap the bottom of the second card slot 130 to fix the position of the limiting member 222. At the same time, the two side walls of the first card slot 2224 on the first limiting portion 2221 contact the fixing member 221 to form a limiting fit, completing the limiting and fixing of the front wheel assembly 210. When releasing the limit on the front wheel assembly 210, first lift the limiting member 222 vertically through the first limiting portion 2221 so that the third limiting portion 2223 is aligned with the second card slot 130, and then take out the limiting member 222 in a direction away from the seat body 100.

[0089] See Figures 5 to 7 As shown, according to some embodiments of the present invention, in the limiting state, the inner wall of the third limiting portion 2223 is in limiting fit with the inner wall of the seat body 100.

[0090] By setting the inner wall of the third limiting portion 2223 and the inner wall of the seat body 100 to be in limiting fit in the limiting state, the limiting and fixing effect of the limiting member 222 can be further improved.

[0091] Specifically, in this embodiment, the inner wall of the third limiting portion 2223 is provided with a convex arc surface, and the inner wall of the seat body 100 is provided with a concave arc surface. In the limiting state, the two arc surfaces cooperate with each other to further limit the limiting member 222 and the seat body 100, ensuring its limiting and fixing effect.

[0092] See Figure 6 and Figure 8 As shown, according to some embodiments of the present invention, the seat body 100 is provided with a fourth limiting portion 140 and a fifth limiting portion 150. The fourth limiting portion 140 is used to limit the maximum steering angle of the front wheel assembly 210 in the first direction, and the fifth limiting portion 150 is used to limit the maximum steering angle of the front wheel assembly 210 in the second direction.

[0093] It should be noted that the above first direction and second direction respectively refer to the two rotation directions of the front wheel assembly 210. For example, the first direction can be understood as the direction in which the front wheel assembly 210 rotates counterclockwise, and the second direction can be understood as the direction in which the front wheel assembly 210 rotates clockwise.

[0094] By providing a fourth limiting portion 140 and a fifth limiting portion 150 on the seat body 100, the maximum steering angle of the front wheel assembly 210 can be limited by the fourth limiting portion 140 and the fifth limiting portion 150. When the front wheel assembly 210 is in an unconstrained state, its steering angle is restricted by the fourth limiting portion 140 and the fifth limiting portion 150, preventing the steering angle of the front wheel assembly 210 from deviating from the set range, so as to more effectively adjust the gap between the refrigerator and the kitchen cabinet.

[0095] As an example, in this embodiment, the fourth limiting portion 140 can limit the steering angle of the front wheel assembly 210 to the horizontal position (i.e., the width direction of the refrigerator) through the fixing member 221, and the fifth limiting portion 150 can limit the steering angle of the front wheel assembly 210 to the vertical position (i.e., the depth direction of the refrigerator) through the following rotating shaft 214. When the front wheel assembly 210 is released from the limit, under the constraint of the fourth limiting portion 140, it cannot continue to steer towards the fourth limiting portion 140, and under the constraint of the fifth limiting portion 150, it cannot continue to steer towards the fifth limiting portion 150.

[0096] See Figure 5 and Figure 6 As shown, according to some embodiments of the present invention, the front wheel assembly 210 further includes a rotating shaft 214, and the front wheel 211 is rotatably sleeved on the rotating shaft 214, and the fixing member 221 is integrally provided with the rotating shaft 214.

[0097] By integrally providing the fixing member 221 with the rotating shaft 214, the structural design of the front wheel assembly 210 and the front wheel limiting assembly 220 can be simplified, and the number of components and the assembly difficulty can be reduced.

[0098] Specifically, one end of the rotating shaft 214 is located inside the steering support 212, and the front wheel 211 and the steering support 212 are configured to be rotatably connected. The other end of the rotating shaft 214 extends out of the steering support 212 as the fixing member 221. The extending length of the fixing member 221 can be set according to actual needs, as long as the fixing requirements of the limiting member 222 (the first limiting portion 2221) can be met.

[0099] See Figures 9 to 11As shown, according to some embodiments of the present invention, the foot adjustment assembly 240 includes a first worm gear 241, a first worm 242, a first screw 243 and a first threaded seat 244. Both the first worm gear 241 and the first worm 242 are rotatably connected to the seat body 100. The first threaded seat 244 is fixedly connected to the seat body 100. The first worm gear 241 cooperates with the first worm 242. One end of the first screw 243 is connected to the support foot 230. The first worm gear is sleeved on the first screw 243 and can drive the first screw 243 to rotate. And the first screw 243 is in vertical sliding fit with the first worm gear. The first screw 243 is threadedly connected to the first threaded seat 244. The rear wheel adjustment assembly 320 includes a second worm gear 321, a second worm 322, a second screw 323 and a second threaded seat 324. Both the second worm gear 321 and the second worm 322 are rotatably connected to the seat body 100. The second threaded seat 324 is fixedly connected to the seat body 100. The second worm gear 321 cooperates with the second worm 322. One end of the second screw 323 is connected to the rear wheel assembly 310. The second worm gear 321 is sleeved on the second screw 323 and can drive the second screw 323 to rotate. And the second screw 323 is in vertical sliding fit with the second worm gear. The second screw 323 is threadedly connected to the second threaded seat 324.

[0100] By setting both the foot adjustment assembly 240 and the rear wheel adjustment assembly 320 in the structure form of worm gears and worm drives, it is more labor-saving to adjust the height of the refrigerator, and stepless adjustment can be realized, improving the adjustment accuracy.

[0101] Specifically, the worm gear and worm drive has a relatively high reduction ratio, which can effectively amplify the applied force, thus reducing the force application requirements of the operator and realizing easy adjustment. In addition, the worm gear and worm system can achieve stepless adjustment, and the adjustment process is smooth and continuous. The user can accurately adjust the extended lengths of the support feet 230 and the rear wheels 311 relative to the seat body 100 according to needs, avoiding the limitation of fixed gears and improving the flexibility and accuracy of adjustment. In addition, the worm gear and worm also have a self-locking function, which can prevent the position from slipping back or changing due to external force during the adjustment process, increasing the stability of the system. At the same time, the design of the worm gear and worm is wear-resistant and has a strong bearing capacity, which can effectively disperse stress and extend the service life of the assembly.

[0102] As an example, in this embodiment, the foot adjustment assembly 240 further includes a first protective housing 245. Both the first worm gear 241 and the first worm 242 are located inside the first protective housing 245. The first protective housing 245 is fixedly arranged inside the seat body 100, and the first threaded seat 244 is fixed to the top of the first protective housing 245. The rear wheel adjustment assembly 320 further includes a second protective housing 325. Both the second worm gear 321 and the second worm 322 are located inside the second protective housing 325. The second protective housing 325 is fixedly arranged inside the seat body 100, and the second threaded seat 324 is fixed to the top of the second protective housing 325. The first protective housing 245 and the second protective housing 325 can provide protection for the worm gear and worm structure, preventing external impurities from entering the mating part of the two.

[0103] See Figure 10 As shown, when adjusting the foot adjustment assembly 240, rotate the first worm 242 to drive the first worm gear 241 to rotate. Under the constraint of the first threaded seat 244, the first screw 243 can drive the supporting foot 230 to move vertically, realizing the height adjustment of the front part of the refrigerator. And before the supporting foot 230 contacts the ground, the supporting foot 230 can move away from the seat body 100. After the supporting foot 230 contacts the ground, the supporting foot 230 cannot continue to move downward. Under the reaction force of the supporting foot 230, the front part of the refrigerator can be driven to move upward. See Figure 11 As shown, when adjusting the rear wheel adjustment assembly 320, rotate the second worm 322 to drive the second worm gear 321 to rotate. Under the constraint of the second threaded seat 324, the second screw 323 can drive the rear wheel assembly 310 to move vertically, realizing the height adjustment of the rear part of the refrigerator.

[0104] See Figures 9 to 11 As shown, according to some embodiments of the present invention, the foot adjustment assembly 240 further includes a first adjustment member 246. The first adjustment member 246 is connected to the first worm 242. The first adjustment member 246 is provided with a first engagement portion 247. The first engagement portion 247 is used to connect with an adjustment component to drive the first adjustment member 246 to rotate. The rear wheel adjustment assembly 320 further includes a second adjustment member 326. The second adjustment member 326 is connected to the second worm 322. The second adjustment member 326 is provided with a second engagement portion 327. The second engagement portion 327 is used to connect with an adjustment component to drive the second adjustment member 326 to rotate.

[0105] By providing the first adjustment member 246 and the second adjustment member 326, it is convenient to adjust the foot adjustment assembly 240 and the rear wheel adjustment assembly 320, simplifying the operation.

[0106] Specifically, during adjustment, the adjusting member can be connected to the first engaging portion 247 of the first adjusting member 246, and the first adjusting member 246 can be rotated to drive the first worm 242 to rotate. Similarly, the adjusting member can be connected to the second engaging portion 327 of the second adjusting member 326, and the second adjusting member 326 can be rotated to drive the second worm 322 to rotate.

[0107] As an example, both the first engaging portion 247 and the second engaging portion 327 are internal hexagonal engaging portions, which can cooperate with the corresponding tool, that is, the adjusting member mentioned above (such as an internal hexagonal wrench).

[0108] See Figure 9 As shown, according to some embodiments of the present invention, both the first engaging portion 247 and the second engaging portion 327 are located on the same side of the base body 100.

[0109] By arranging both the first engaging portion 247 and the second engaging portion 327 on the same side of the base body 100, the user only needs to perform adjustments at the same position on one side of the base body 100 without frequent movement, which improves the convenience during the height adjustment of the refrigerator.

[0110] Specifically, a relief hole for the first adjusting member 246 and the second adjusting member 326 to pass through is provided on one side of the base body 100. The first adjusting member 246 and the second adjusting member 326 pass through the corresponding relief holes and are disposed in the base body 100, and the first engaging portion 247 and the second engaging portion 327 are located outside the base body 100 for easy operation.

[0111] As an example, in this embodiment, both the first engaging portion 247 and the second engaging portion 327 are located outside the base body 100, which can further improve the convenience during the height adjustment of the refrigerator.

[0112] The refrigerator provided by the present invention will be described below. The refrigerator described below can be mutually referred to with the foot module described above.

[0113] The refrigerator provided by the embodiments of the present invention includes: a box body; and the foot module as described in any one of the above embodiments, and the foot module is disposed at the bottom of the box body.

[0114] Since the refrigerator provided by the present invention adopts the foot module as described in any one of the above embodiments, it can easily adjust the gap between the refrigerator and the cabinet, prevent excessive pressure on the cabinet during the centering adjustment of the refrigerator, and ensure that the refrigerator remains stable in the cabinet without displacement after the adjustment. It solves the defects that the existing adjusting device is likely to apply excessive pressure to the wooden cabinet when adjusting the gap between the refrigerator and the cabinet, resulting in deformation or damage of the cabinet, and it is impossible to effectively and accurately adjust the position of the refrigerator.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foot module, characterized in that, Comprising: A foot module configured to be disposed at the bottom of the refrigerator cabinet. The foot module includes: A base body; A front wheel structure including a front wheel assembly, a front wheel limiting assembly, a support foot, and a foot adjusting assembly; The front wheel assembly includes a front wheel and a steering support. The front wheel is rotatably connected to the steering support, and the steering support is rotatably connected to the base body; The front wheel limiting assembly includes a fixing member and a limiting member. The fixing member is disposed on the steering support, and the limiting member is detachably connected to the fixing member. In the limiting state, the limiting member is in limiting cooperation with the base body and at least one of the steering support and the fixing member to limit the steering freedom of the steering support; The foot adjusting assembly is disposed on the base body, and the output end of the foot adjusting assembly is connected to the support foot to adjust the protruding length of the support foot relative to the base body; A rear wheel structure including a rear wheel assembly and a rear wheel adjusting assembly; The rear wheel adjusting assembly is disposed on the base body, and the output end of the rear wheel adjusting assembly is connected to the rear wheel assembly to adjust the protruding length of the rear wheel assembly relative to the base body.

2. The foot module according to claim 1, characterized in that, In the limiting state, the limiting member is in limiting cooperation with the base body and is in limiting cooperation with both the steering support and the fixing member to limit the steering freedom of the steering support.

3. The foot module according to claim 2, characterized in that The limiting member includes a first limiting portion, a second limiting portion, and a third limiting portion connected in sequence. The first limiting portion is detachably connected to the fixing member; The first limiting portion is provided with a first card slot, the base body is provided with a second card slot, and the side of the steering support facing the limiting member is provided with an abutting surface; In the limiting state, the first limiting portion is in snap-fit with the fixing member, the second limiting portion is in snap-fit with the second card slot, and the third limiting portion is in abutting cooperation with the abutting surface.

4. The foot module according to claim 3, characterized in that The fixing member passes through the first card slot; In the limiting state, the top of the first card slot contacts the fixing member, and / or the bottom of the second limiting portion contacts the bottom of the second card slot.

5. The foot module according to claim 4, characterized in that The height of the first card slot is greater than or equal to the height of the second card slot, and the height of the second card slot is greater than or equal to the height of the third limiting portion.

6. The foot module according to claim 3, characterized in that In the limiting state, the inner wall of the third limiting portion is in limiting cooperation with the inner wall of the base body.

7. The foot module according to claim 1, characterized in that The base body is provided with a fourth limiting portion and a fifth limiting portion. The fourth limiting portion is used to limit the maximum steering angle of the front wheel assembly in a first direction, and the fifth limiting portion is used to limit the maximum steering angle of the front wheel assembly in a second direction.

8. The foot module according to claim 1, wherein The front wheel assembly further includes a rotating shaft, the front wheel is rotatably sleeved on the rotating shaft, and the fixing member is integrally provided with the rotating shaft.

9. The foot module according to claim 1, wherein Including two of the foot modules, the two foot modules are configured to be symmetrically disposed on both sides of the bottom of the refrigerator cabinet.

10. The foot module according to any one of claims 1 to 9, characterized in that, The foot adjustment assembly includes a first worm gear, a first worm, a first screw rod, and a first threaded seat. The first worm gear and the first worm are both rotatably connected to the seat body. The first threaded seat is fixedly connected to the seat body. The first worm gear is engaged with the first worm. One end of the first screw rod is connected to the support foot. The first worm gear is sleeved on the first screw rod and can drive the first screw rod to rotate. The first screw rod is in vertical sliding fit with the first worm gear. The first screw rod is threadedly connected to the first threaded seat; The rear wheel adjustment assembly includes a second worm gear, a second worm, a second screw rod, and a second threaded seat. The second worm gear and the second worm are both rotatably connected to the seat body. The second threaded seat is fixedly connected to the seat body. The second worm gear is engaged with the second worm. One end of the second screw rod is connected to the rear wheel assembly. The second worm gear is sleeved on the second screw rod and can drive the second screw rod to rotate. The second screw rod is in vertical sliding fit with the second worm gear. The second screw rod is threadedly connected to the second threaded seat.

11. The foot module according to claim 10, characterized in that, The foot adjustment assembly further includes a first adjusting member. The first adjusting member is connected to the first worm. A first engaging portion is provided on the first adjusting member. The first engaging portion is used for connecting with an adjusting component to drive the first adjusting member to rotate; The rear wheel adjustment assembly further includes a second adjusting member. The second adjusting member is connected to the second worm. A second engaging portion is provided on the second adjusting member. The second engaging portion is used for connecting with an adjusting component to drive the second adjusting member to rotate.

12. The foot module according to claim 11, wherein Both the first engaging portion and the second engaging portion are located on the same side of the seat body.

13. A refrigerator, characterized in that, Comprising: A box body; The foot module according to any one of claims 1 to 12, wherein the foot module is arranged at the bottom of the box body.

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