MOBILE VEHICLE RACK

Abstract

A mobile rack for a vehicle includes a main body configured to mount or detach a comfort device on the main body, the main body being coupled to a rail formed on a floor of the vehicle and configured to be slidable on the rail, and configured to be pulled out to the outside of the vehicle through an opening portion of a door of the vehicle, and casters connected to a lower portion of the main body by link assemblies and configured to be received in the lower portion of the main body when the main body is coupled to the floor of the vehicle and to be extended downwardly from the main body when the main body is pulled out to the outside of the vehicle.

Description

BACKGROUND OF THE PRESENT DISCLOSURE Technical Field

[0001] The present disclosure relates to a mobile rack for a vehicle that is configured to be installed inside or outside a vehicle and is equipped with various convenience devices that can be freely used by users both inside and outside the vehicle. Technical background

[0002] Autonomous vehicles have evolved beyond simple means of transportation to a concept where a space within the vehicle can be used while the vehicle is moving.

[0003] Because the autonomous vehicle is not controlled by a driver, the occupants can perform various activities inside the vehicle. For this purpose, various comfort devices must be installed in the vehicle.

[0004] For example, a display with a large screen can be mounted in the vehicle so that the occupant can watch films, make a video call or access various information while driving.

[0005] Alternatively, a storage box, table or the like may be installed and it may be necessary to install air conditioning or other mechanisms required in the vehicle.

[0006] However, predetermined mechanisms are installed at predetermined points in a confined space in the current vehicle, making it difficult to meet the different needs of users.

[0007] Therefore, in order for the autonomous vehicle to meet the different needs of users, different comfort devices must be installed interchangeably or separated at a specific point in the vehicle interior to meet the needs of users.

[0008] Vehicles are now becoming a concept of a space that can be used in daily life beyond a simple means of transportation. The vehicle can be used as a mobile storage facility or as a lodging facility when stationary. In this case, the comfort features located inside the vehicle can be accessed from outside the vehicle.

[0009] In the future, there is therefore a need for a system that can be freely installed inside or outside the vehicle and that provides users with a wide range of usage options and satisfaction through installation compatibility with various comfort devices.

[0010] The information contained in this background of the present disclosure is intended only to enhance the understanding of the general background of the present disclosure and should not be construed as an acknowledgment or as a form of suggestion that this information constitutes prior art already known to a person skilled in the art. DEPICTION

[0011] Various aspects of the present disclosure are directed to providing a mobile rack for a vehicle that is configured to be deployed inside or outside a vehicle and is provided with various convenience devices that can be freely used by users from inside or outside the vehicle.

[0012] To achieve the above-mentioned object, a mobile rack for a vehicle according to an exemplary embodiment of the present disclosure includes: a main body configured such that a comfort device is mounted on or detached from the main body, the main body being coupled to a rail formed on a floor of the vehicle, the main body being configured to be slidable on the rail, and the main body being configured to be pulled out to the outside of the vehicle through an opening portion of a door of the vehicle;and road wheels connected to a lower portion of the main body by connecting assemblies and configured to be received in the lower portion of the main body when the main body is coupled to the floor of the vehicle and to be extended downwardly from the main body when the main body is pulled outwardly of the vehicle;

[0013] The main body may have a square frame shape.

[0014] The convenience device may be a display and / or a storage box and / or a shelf and / or a table.

[0015] A connector may be provided at a lower end portion of the main body, and the comfort device may be electrically connected to the vehicle via the connector and the rail.

[0016] The main body can be supported on the rail by the running wheel.

[0017] The rail can run from the floor of the vehicle to the door.

[0018] The rail may have a groove shape recessed in the vehicle floor, a retaining portion may be formed at an upper portion of the rail, and a projecting portion may be formed at a lower end portion of the main body and held by the retaining portion without being pulled out upward in a state where the projecting portion is inserted into the groove of the rail.

[0019] When the main body is coupled to the floor of the vehicle, the connecting assembly can be folded and accommodated in the lower portion of the main body, and a lower end portion of the road wheel can be exposed downwardly on the main body and supported on the rail.

[0020] The link assembly may have an extension portion configured to provide elasticity in an extension direction, and when the main body is pulled out to the outside of the vehicle, the link assembly may be extended by the extension portion, and the road wheel may be supported on a ground surface outside the vehicle.

[0021] The connecting assemblies and the traveling wheels may be provided on two opposite sides of a lower end portion of the main body, and when the main body is pulled out from the vehicle, the connecting assembly, which is one of the connecting assemblies on the two opposite sides that is pulled out first, may be extended and supported on a ground surface by the traveling wheel, and in this state, the remaining part of the main body can be pulled out.

[0022] The mobile rack for a vehicle of the present disclosure may be provided inside or outside the vehicle and may be provided with various convenience devices that can be freely used by users inside or outside the vehicle.

[0023] The methods and apparatus of the present disclosure have additional features and advantages that will be apparent from the accompanying drawings included herein and the following detailed description, which together serve to explain certain principles of the present disclosure, or which are set forth in more detail in those drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view exemplifying a state in which a mobile rack for a vehicle according to an exemplary embodiment of the present disclosure is provided in a vehicle. Fig. 2 is a view exemplifying a state in which the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is provided outside the vehicle. Fig. 3 and Fig. 4 are views exemplarily showing a state in which a connection structure of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is accommodated. Fig. 5 is a view exemplifying a state in which the connection assembly of the mobile stand for a vehicle according to the exemplary embodiment of the present disclosure is extended. Fig. 6 is a view exemplifying a state in which the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is provided on a floor of the vehicle. Fig. 7 is a view exemplifying a state in which the mobile stand for a vehicle according to the exemplary embodiment of the present disclosure is pulled out from the vehicle. Fig. 8 is a view exemplifying a state in which the connection structure of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is extended outside the vehicle. Fig. 9 is a view exemplifying a state in which the connection structure of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is accommodated outside the vehicle.

[0024] The accompanying drawings are not necessarily to scale and present a somewhat simplified representation of various features illustrating the basic principles of the present disclosure. The specific design features of the present disclosure as contained herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific intended application and environment of use.

[0025] In the figures, like reference numerals refer to like or equivalent parts of the present disclosure throughout the figures of the drawing. DETAILED DESCRIPTION

[0026] Reference will now be made in detail to various embodiments of the present disclosure(s), examples of which are illustrated in the accompanying drawings and described below. While the present disclosure(s) are described in conjunction with exemplary embodiments of the present disclosure, this description is not intended to limit the present disclosure(s) to these exemplary embodiments of the present disclosure. On the contrary, the present disclosure(s) are intended to cover not only the exemplary embodiments of the present disclosure, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the present disclosure as defined by the appended claims.

[0027] Hereinafter, various exemplary embodiments included in the present specification will be described in detail with reference to the accompanying drawings. The same or similar components are denoted by the same reference numerals regardless of the reference numerals, and a repeated description will be omitted.

[0028] In the description of the embodiments included in the present specification, specific descriptions of related technologies known from the prior art are omitted if it is determined that these specific descriptions might obscure the subject matter of the embodiments included in the present specification. Furthermore, it is noted that the accompanying drawings are provided only to enable those skilled in the art to easily understand the embodiments included in the present specification, and that the technical spirit included in the present specification is not limited by the accompanying drawings and includes all changes, equivalents, and alternatives included within the spirit and technical scope of the present disclosure.

[0029] The terms, including ordinal numbers such as "first," "second," and the like, may be used to describe various components, but the components are not limited by the terms. These terms are used only to distinguish one component from another.

[0030] Expressions in the singular include expressions in the plural unless the context clearly indicates different meanings.

[0031] In the present description, the terms "comprises", "comprising", "having", "comprising", "including", "containing", "having", "with" or other variations thereof are intended to be inclusive and therefore specify the presence of certain features, integers, steps, operations, elements, components or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0032] The suffixes "module", "unit", "part" and "section", used to describe component parts in the following description, are used together or interchangeably to facilitate description, but the suffixes themselves have no distinguishable meanings or functions.

[0033] When a component is described as "coupled" or "connected" to another component, one component may be directly coupled or connected to another component, and there may also be an intervening component between the components. When a component is described as "directly coupled" or "directly connected" to another component, it is assumed that no intervening component exists between the components.

[0034] Fig. 1 is a view exemplifying a state in which a mobile rack for a vehicle according to an exemplary embodiment of the present disclosure is provided in a vehicle, Fig. 2 is a view exemplifying a state in which the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is provided outside the vehicle, Fig. 3 and Fig. 4 are views exemplifying a state in which a connection structure of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is accommodated, Fig. 5 is a view exemplifying a state in which the connection assembly of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is extended, Fig. 6 is a view exemplifying a state in which the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is provided on a floor of the vehicle, Fig. 7 is a view exemplifying a state in which the mobile stand for a vehicle according to the exemplary embodiment of the present disclosure is pulled out of the vehicle, Fig. 8 is a view exemplifying a state in which the connection assembly of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is extended outside the vehicle, and Fig. 9 is a view exemplifying a state in which the connection structure of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is accommodated outside the vehicle.

[0035] A mobile rack for a vehicle according to an exemplary embodiment of the present disclosure includes: a main body configured to mount or detach a comfort device on or from the main body, the main body coupled to a rail formed on a floor of the vehicle, configured to slide on the rail, and configured to be pulled out to the outside of the vehicle through a door opening portion of the vehicle; and casters connected to a lower portion of the main body by link assemblies and configured to be received in the lower portion of the main body when the main body is coupled to the floor of the vehicle, and to be extended downward from the main body when the main body is pulled out to the outside of the vehicle.

[0036] First, an example in which the mobile rack for a vehicle of the present disclosure is applied will be described with reference to the drawings. Fig. 1 is a view exemplarily showing a state in which the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is provided in the vehicle, and Fig. 2 is a view exemplifying a state in which the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is provided outside the vehicle.

[0037] Fig. 1 illustrates that the mobile rack is provided inside the vehicle. In this case, as shown, a main body 100 of the mobile rack may be provided on a floor 300 of the vehicle. Further, a display 520 may be provided on the main body 100 as a convenience device for allowing passengers to watch videos on the display 520. The main body 100 may be mounted on a rail 310 of the vehicle floor 300 and slide left and right. In the illustrated case, a door 340 is provided on a lateral side of the vehicle body, and the rail 310 provided on the floor 300 extends in the left and right width directions of the vehicle. Therefore, the main body 100 of the mobile rack can slide left and right on the floor 300 of the vehicle, that is, slide in the width direction of the vehicle.

[0038] When the vehicle is stationary and the door 340 is open, the mobile frame can be pushed outward and pulled out through an opening portion of the door 340.

[0039] In Fig. 2 shows the mobile rack being extended outside the vehicle. When the main body 100 is extended outside the vehicle, the main body 100 is used to install various convenience devices outside the vehicle. For example, as shown, a table 560 may be provided on the main body 100 outdoors so that users can enjoy coffee or the like, and various shelves 540 may be provided on the main body so that simple outdoor shopping can be conducted.

[0040] As described above, the mobile rack of the present disclosure can be mounted inside the vehicle and deployed outside the vehicle. Various convenience devices can be provided on the mobile rack so that the mobile rack is configured as a rack with maximum utilization.

[0041] When the vehicle is an autonomous vehicle or an electric vehicle, the mobile rack of the present disclosure enables the vehicle to be used as a mobile cafe or shop, and the user's use can also be diversified, which enriches human life.

[0042] Several functions are required for the mobile rack of the present disclosure to be used both inside and outside the vehicle. Rigidity must be ensured inside the vehicle to prevent injuries caused by the provided comfort device in the event of a vehicle collision. Therefore, the main body 100 must be made of a material such as steel to ensure rigidity. In addition, the rack must be sized to fill the interior space of the vehicle to ensure a size for mounting various comfort devices. Because the weight increases due to the material and size, the rail 310 must be provided inside the vehicle to move the rack, and the rack must slide along the rail 310.

[0043] For this purpose, the rail 310 is formed on the floor 300 of the vehicle. The rail 310 extends in the width direction of the vehicle and guides the sliding movement of the main body 100 in the width direction of the vehicle. Furthermore, the rail 310 extends toward the opening portion of the vehicle door 340. Therefore, when the vehicle door 340 is opened, the main body 100 is guided such that the main body 100 slides along the rail 310 toward the outside of the vehicle.

[0044] The idler wheels 150 are connected to a lower portion of the main body 100 by connecting assemblies 140. In the case where the main body 100 is coupled to the floor 300 of the vehicle, the idler wheel 150 is received in the lower portion of the main body 100 and guides the sliding movement of the main body 100 on the rail 310. Since the main body 100 is difficult to move due to friction in a state where the main body 100 is in surface contact with the rail 310, the main body 100 can be easily displaced by the idler wheel 150 provided at the lower portion of the main body 100, so that the position of the main body 100 can be changed. When the main body 100 is pulled out of the vehicle, the idler wheel 150 is extended downward from the main body 100 so that the horizontality of the main body 100 is maintained during the pulling out process.

[0045] The floor 300 of the vehicle has a height difference with a ground surface GL. Therefore, a part of the main body 100 exposed to the outside must be supported or supported on the ground surface GL while the main body 100 is pulled out to the outside of the vehicle. That is, in order to stably pull out the main body 100, a part of the main body 100 exposed may be supported on the ground surface GL, and the remaining part of the main body 100 not exposed may be supported on the floor 300 of the vehicle, so that the horizontality of the main body 100 can be maintained and the frame can be pulled out stably and without accidents. For this purpose, the idler wheel 150 is provided on the main body 100 through the linkage assembly 140.The connection assembly 140 is folded and received in the lower portion of the main body 100, and the connection assembly 140 is folded out and deployed toward the ground surface GL.

[0046] Fig. 3 and Fig. 4 are views exemplarily showing a state in which the connection structure of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is accommodated, and Fig. 5 is a view exemplifying a state in which the connection assembly of the mobile stand for a vehicle according to the exemplary embodiment of the present disclosure is extended.

[0047] As illustrated, the main body 100 may have a square frame shape. Furthermore, the convenience device provided on the main body 100 may be a display, a storage box, a shelf, and / or a table.

[0048] At the same time, a connector 160 is provided at a lower end portion of the main body 100, and the comfort device can be electrically connected to the vehicle via the connector 160 and the rail 310. The connector 160 can be electrically connected to the comfort device provided on the main body 100. If the connector 160 can be electrically connected to a separate connection connector on the rail 310, the connector 160 is connected to a vehicle battery via the connection connector. Therefore, the comfort device provided on the main body 100 can be electrically connected to the vehicle and also enable data communication.

[0049] Here, the main body 100 can be supported on the rail 310 by the idler wheel 150. Furthermore, the rail 310 can extend from the floor 300 of the vehicle toward the door 340.

[0050] The rail 310 may have a groove 301 cut into the floor 300 of the vehicle, and a retaining portion 320 may be formed at an upper portion of the rail 310. A protruding portion 120 may be formed at the lower end portion of the main body 100, and the protruding portion 120 may be engaged by the retaining portion 320 without being pulled upward in a state where the protruding portion 120 is inserted into the groove 301 of the rail. Therefore, the main body 100 can stably slide on the rail 310 by a rolling motion of the caster 150. When the retaining portion 320 and the protruding portion 120 are engaged, the main body 100 is prevented from swaying in the vehicle and being pulled out from the floor 300.Therefore, even in the event of a collision of the vehicle or even when the vehicle is running on an uneven road surface, the position of the main body 100 can be stably maintained, and the safety and comfort of the passengers are ensured.

[0051] In the case where the main body 100 is coupled to the floor 300 of the vehicle, the connecting assembly 140 may be folded and received in the lower portion of the main body 100, wherein the lower end portion of the idler wheel 150 protrudes downward from the main body 100 and may be supported on the rail 310.

[0052] Fig. 6 is a view exemplifying a state in which the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is provided on the floor of the vehicle, Fig. 7 is a view exemplifying a state in which the mobile stand for a vehicle according to the exemplary embodiment of the present disclosure is pulled out of the vehicle, Fig. 8 is a view exemplifying a state in which the connection assembly of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is extended outside the vehicle, and Fig. 9 is a view exemplifying a state in which the connection structure of the mobile rack for a vehicle according to the exemplary embodiment of the present disclosure is accommodated outside the vehicle.

[0053] The link assembly 140 includes an extension portion configured to provide elasticity in an extension direction. When the main body 100 is pulled out of the vehicle, the link assembly 140 can be extended through the extension portion, allowing the road wheel to rest on the ground surface outside the vehicle. As shown in the figure, an example of the extension portion may include a cylinder 170 and a piston 174. Further, the cylinder 170 is pressurized with hydraulic or pneumatic pressure, and a member such as a spring is embedded in the cylinder 170 so that the pressure can always be applied in a direction in which the piston 174 is extended.

[0054] Fig. 5 is a view illustrating a lower side of the main body by way of example. The impeller 150 and the connecting assembly 140 can be accommodated in the lower portion of the main body 100. Fig. 5 shows that the link assembly 140 is retracted and the piston 174 is compressed inside the cylinder 170. The cylinder 170 is connected to the main body 100 via a rotary shaft 172, and a link 142 configured to support the impeller 150 is also connected to the main body via a rotary shaft 143. Further, the piston 174 is connected to the link 142 by a support rod 144, so that the impeller 150 approaches the lower side of the main body 100 when the piston 174 is retracted, and the impeller 150 is deployed in a direction away from the main body 100 when the piston 174 is extended.

[0055] Fig. Figure 6 shows that the main body is mounted on the rail of the vehicle floor. In this case, the connecting assembly 140 is included, and the main body 100 is displaced by the idler wheel 150 on the rail 310 and coupled to the floor 300.

[0056] Fig. 7 shows that the door 340 of the vehicle is opened, and a part of the main body 100 is pulled out through the opening portion. The link assemblies 140 and the idler wheels 150 are provided on two opposite sides of the lower end portion of the main body. When the main body 100 is pulled out of the vehicle, the link assembly 140, which is one of the link assemblies on the two opposite sides that is pulled out first, can be extended and supported on the ground surface GL by the idler wheel 150', and in this state, the remaining part of the main body 100 can be pulled out.In the present configuration, even in the state where a part of the main body 100 is pulled out, the main body 100 maintains stable horizontality with respect to the ground surface GL or the floor 300 of the vehicle, preventing failure of the main body 100 and the comfort device provided on the main body 100. Furthermore, the main body 100 is stably supported, so that the user who pulls out the main body 100 can comfortably pull out the main body 100 without injury.

[0057] As in Fig. As shown in Figure 8, both link assemblies 140 are extended when the main body 100 is stably pulled out of the vehicle. Therefore, the main body 100 can be moved by the traveling wheels 150 on the ground surface GL in a state where the main body 100 is at a predetermined height from the ground surface GL.

[0058] In the event that the main body 100 has to be picked up at a point on the ground surface GL, the two connecting assemblies 140 on the two opposite sides are pulled together so that the main body 100 can be fixed to the ground surface GL, as shown in Fig. 9. In this case, too, a part of the lower end portion of the running wheel 150 is exposed to the ground surface, so that the main body 100 can slide on the ground surface GL. A center of gravity of the main body 100 is lowered by the contraction of the connecting assembly 140, so that the main body 100 can be used stably outside the vehicle, as shown in Fig. 2 shown.

[0059] The mobile rack for a vehicle of the present disclosure can be mounted inside or outside the vehicle and provided with various comfort devices that can be freely used by users inside or outside the vehicle.

[0060] In an exemplary embodiment of the present disclosure, the vehicle may be described as being based on a concept that includes various means of transportation. In some cases, the vehicle may be configured to be based on a concept that includes not only various land transportation means such as cars, motorcycles, trucks, and buses traveling on roads, but also various means of transportation such as airplanes, drones, ships, etc.

[0061] For ease of explanation and for precise definition in the appended claims, the terms "top," "bottom," "inside," "outside," "up," "down," "upward," "downward," "front," "backward," "rear," "stern," "inward," "outward," "inside," "outside," "internal," "external," "inward," "outward," "forward," and "backward" are used to describe features of the exemplary embodiments with reference to the positions of those features illustrated in the figures. The term "connect" or its derivatives refer to both direct and indirect connection.

[0062] The term "and / or" may include a combination of multiple related listed items or one of multiple related listed items. For example, "A and / or B" includes all three cases, such as "A," "B," and "A and B."

[0063] In exemplary embodiments of the present disclosure, "at least one of A and B" may refer to "at least one of A or B" or to "at least one of combinations of at least one of A and B." Further, "one or more of A and B" may refer to "one or more of A or B" or "one or more combinations of one or more of A and B."

[0064] In this description, unless otherwise stated, the singular includes the plural, unless the context clearly indicates otherwise.

[0065] In the exemplary embodiment of the present disclosure, it is noted that a term such as "having" or "comprising" is intended to imply that the features, numbers, steps, acts, elements, parts, or combinations thereof described in the specification are present, and does not exclude the possibility that one or more other features, numbers, steps, acts, elements, parts, or combinations thereof are added or present.

[0066] According to an exemplary embodiment of the present disclosure, the components may be combined with each other to be implemented as a unit, or some components may be omitted.

[0067] The foregoing descriptions of specific exemplary embodiments of the present disclosure have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present disclosure to the precise forms disclosed, and, of course, many changes and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application in order to enable those skilled in the art to make and use various exemplary embodiments of the present disclosure, as well as various alternatives and modifications thereof. It is understood that the scope of the present disclosure is defined by the appended claims and their equivalents.

Claims

[1] Mobile frame for a vehicle, the mobile frame comprising: a main body configured to mount or detach a comfort device to or from the main body, the main body being slidably coupled to a rail formed on a floor of the vehicle and configured to be pulled out to the outside of the vehicle through an opening portion of a door of the vehicle; and Road wheels connected to a lower portion of the main body by linkage assemblies and configured to be received within the track of the main body in response to the main body being coupled to the floor of the vehicle and to be extended downwardly from the main body in response to the main body being withdrawn outwardly of the vehicle. [2] A mobile rack according to claim 1, wherein the main body has a quadrangular frame shape. [3] Mobile rack according to claim 1, wherein the comfort device comprises a display and / or a storage box and / or a shelf and / or a table. [4] A mobile rack according to claim 1, wherein a connector is provided at a lower end portion of the main body, and the comfort device is electrically connected to the vehicle through the connector and the rail. [5] A mobile rack according to claim 1, wherein the main body is supported on the rail by the running wheels. [6] A mobile rack according to claim 1, wherein the rail extends in a direction from the floor of the vehicle toward the opening portion of the door. [7] A mobile rack according to claim 1, wherein the rail has a groove recessed in the vehicle floor, a retaining portion is formed at an upper portion of the rail, and a projecting portion is formed at the lower portion of the main body and is held by the retaining portion so as not to be pulled out upward in a state where the projecting portion is inserted into the groove of the rail. [8] A mobile rack according to claim 1, wherein in response to the main body being coupled to the floor of the vehicle, each link assembly is folded and received in the lower portion of the main body, and a lower end portion of the road wheels on the main body is exposed downward and supported on the rail. [9] A mobile stand according to claim 1, wherein each link assembly has an extension portion configured to provide elasticity in an extension direction of the road wheels, and wherein, in response to the main body being pulled out to the outside of the vehicle, each link assembly is extended by the extension portion and the road wheels are stored on a ground surface outside the vehicle. [10] Mobile frame according to claim 9, wherein the extension portion of each linkage assembly comprises a cylinder and a piston slidably coupled to the cylinder, one end of the cylinder being pivotally connected to the mobile frame, and each connecting arrangement further comprising: a connecting link; and a support rod connecting one end of the piston and the connecting link, wherein a first end of the connecting member is pivotally connected to the main body and a second end of the connecting member is rotatably connected to a corresponding one of the impellers. [11] Mobile frame according to claim 1, wherein the connecting arrangements comprise first and second connecting arrangements, wherein the wheels have first and second wheels, wherein the first and second connecting assemblies and the first and second impellers are provided on first and second opposite sides of the lower portion of the main body, and wherein, in response to the main body being pulled out of the vehicle, the first link assembly which is pulled out first is extended and supported on a ground surface by the first road wheel, and then a remaining part of the main body is pulled out. [12] Mobile frame according to claim 1, wherein the connecting arrangements comprise first and second connecting arrangements, wherein the wheels have first and second wheels, wherein the first and second connecting assemblies and the first and second impellers are provided on first and second opposite sides of the lower portion of the main body, and wherein, in response to the main body being pulled out of the vehicle, the first link assembly is sequentially extended and supported on a ground surface by the first idler wheel, and the second link assembly is sequentially extended and supported on the ground surface by the second idler wheel. [13] Vehicle which has: a floor having a rail; and a mobile frame which has: a main body configured to mount or detach a comfort device on or from the main body, the main body being slidably coupled to the rail formed on the floor of the vehicle and configured to be pulled out to the outside of the vehicle through an opening portion of a door of the vehicle; and Road wheels connected to a lower portion of the main body by linkage assemblies and configured to be received within the track of the main body in response to the main body being coupled to the floor of the vehicle and to be extended downwardly from the main body in response to the main body being withdrawn outwardly of the vehicle. [14] The vehicle according to claim 13, wherein the rail is formed on the floor of the vehicle in a width direction of the vehicle and reaches to the opening portion of the door. [15] The vehicle according to claim 13, wherein a connector is provided at a lower end portion of the main body, and the comfort device is electrically connected to the vehicle via the connector and the rail. [16] The vehicle according to claim 13, wherein the rail has a groove recessed in the floor of the vehicle, a retaining portion is formed at an upper portion of the rail, and a projecting portion is formed at the lower portion of the main body and is held by the retaining portion so as not to be pulled out upward in a state where the projecting portion is inserted into the groove of the rail. [17] The vehicle according to claim 13, wherein in response to the main body being coupled to the floor of the vehicle, the link assembly is folded and received in the lower portion of the main body, and a lower end portion of the road wheels is exposed downwardly on the main body and supported on the rail. [18] The vehicle according to claim 13, wherein each link assembly has an extension portion configured to provide elasticity in an extension direction of the road wheels, and wherein, in response to the main body being pulled outwardly of the vehicle, each link assembly is sequentially extended through the extension portion and the road wheels are supported on a ground surface outside the vehicle. [19] Vehicle according to claim 18, wherein the extension portion of each linkage assembly comprises a cylinder and a piston slidably coupled to the cylinder, one end of the cylinder being pivotally connected to the mobile frame, and each connecting arrangement further comprising: a connecting link; and a support rod connecting one end of the piston and the connecting link, wherein a first end of the connecting member is pivotally connected to the main body and a second end of the connecting member is rotatably connected to a corresponding one of the impellers.

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