Building unit having expandable and contractible space, building, and device

Abstract

Disclosed are a building unit having an expandable and contractible space, a building, and a device. The building unit has switchable contracted and expanded configurations, and comprises a base member (1), a plurality of first expansion members (2), and a plurality of second expansion members (3). Moreover, each first expansion member (2) or second expansion member (3) performs linear movement along the same axial direction or rotational movement about the same axis only once. The building unit, the building, and the device can solve the problem of excessive interference between expansion members during three-dimensional space deformation, effectively reduce the difficulty and cost of realizing synchronous movement of each expansion member, and improve the control precision of synchronous movement.

Description

An expandable and retractable building unit, building structure, and equipment. Technical Field

[0001] This invention relates to the field of engineering construction technology, and in particular to a building unit, building body, and equipment with expandable and retractable space. Background Technology

[0002] As people's living standards improve, new demands have arisen for architecture, with expectations that buildings can adapt to diverse societal changes. Mobile architecture, as a flexible spatial solution, breaks away from the fixed patterns of traditional architecture, allowing living spaces to be easily moved to different locations, satisfying people's increasingly diverse lifestyle choices. Mobile architecture includes mobile homes and RVs. Taking RVs as an example, as a special type of mobile architecture, they are gradually becoming an important means of transportation for leisure travel and even business trips. However, most existing RVs suffer from inadequate spatial structure design, resulting in cramped interior spaces that cannot fully meet user needs. To expand the interior space of a motorhome and meet user needs, it can be designed as an expandable space. For example, Chinese invention patent (CN112537246A) discloses a motorhome cabin that can expand left and right and rise and fall. The motorhome cabin includes a main body, an expandable body, a lifting mechanism, and a telescopic mechanism. When driving, the expandable body can be folded up using the lifting mechanism and the telescopic mechanism, making the overall volume of the cabin smaller. When parked, the expandable body can be extended using the lifting mechanism and the telescopic mechanism, making the overall volume of the cabin larger, thereby increasing the living space.

[0003] Existing expandable space devices typically achieve internal space deformation through mechanical movement of deformable components. During the space deformation process, there are synchronous movement control requirements for the deformable components. Synchronous movement requires consistent movement direction, the same movement speed, and high control precision; otherwise, the relevant deformable components may be torn or damaged. For example, the lifting mechanism used in the aforementioned patent (CN112537246A) requires the four lifting columns of the lifting mechanism to move synchronously when the main body needs to be raised, so as to lift the main body upward.

[0004] However, the inventors discovered in their research that when existing expandable space devices perform space expansion or contraction actions, the same deformable component undergoes multiple deformation actions in multiple directions. These deformable components accumulate a certain error value in each deformation action. As the number of deformation actions increases, the error in these devices performing space expansion or contraction actions also increases. Ultimately, this makes it more difficult and costly to achieve synchronous movement of these devices in mechanical engineering, thus significantly increasing the difficulty and cost of deforming expandable spaces. At the same time, as the deformation direction and number of deformation actions of the same deformable component increase, the error brought by each deformation action also accumulates continuously, which will lead to a decrease in the accuracy of synchronous control, thereby seriously affecting the stability and reliability of expandable spaces, and even causing expandable spaces to become unable to deform.

[0005] Furthermore, the inventors discovered in their research that existing expandable space devices struggle to achieve three-dimensional spatial deformation and opening / closing. In existing expandable space devices, spatial deformation of the deformable components typically relies on a combination of multiple two-dimensional motion actions. This results in numerous two-dimensional motion focal points during the spatial deformation process, and these focal points often contain power devices within the device, preventing the deformable components from penetrating them. As the direction and frequency of these deformation actions increase, these focal points hinder further expansion or contraction of the deformable components, resulting in the absence of buildings capable of achieving three-dimensional spatial deformation and opening / closing in the current civilian sector. Summary of the Invention

[0006] The purpose of this invention is to provide a building unit, building body, and equipment with expandable and retractable space. By setting up expansion components and controlling the deformation mode of the expansion components, the difficulty and cost of achieving synchronous movement are effectively reduced, thereby solving the problem of insufficient stability and reliability of existing mobile buildings.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A building unit with expandable and contractible space, the building unit having interchangeable contractible and expandable forms, and the building unit comprising:

[0009] A reference component, which has a base plane that can remain stationary;

[0010] Multiple first extension members are movably connected to each other, or are movably connected to the reference member, enabling them to move closer to and further away from the reference member;

[0011] Multiple second extension members are movably connected to each other and are also movably connected to the first extension member, enabling them to move closer to and away from the first extension member; or, they are also movably connected to the reference member, enabling them to move closer to and away from the reference member.

[0012] The first and second extension members are configured to move in a translation coordinate system consisting of three axes, wherein the first axis of the translation coordinate system is perpendicular to the base plane, and the second and third axes of the translation coordinate system are two axes orthogonal to the first axis; the movement of the first and second extension members is as follows:

[0013] The first extension performs linear movement along at least one axis and / or rotational movement about at least one axis, so that the first extension moves closer to the reference member and cooperates with the reference member to form a frame, wherein the frame has opposing walls in each axis of the translation coordinate system and the walls in the three axes enclose each other.

[0014] The second extension performs linear movement along at least one axis, and / or rotational movement about at least one axis, so that the second extension moves closer to the outside of the frame, at which point the building unit is in the contracted state;

[0015] The first and second extension members move linearly along at least one axis and / or rotate about at least one axis, moving away from the reference member to form an extension body with the reference member. The first, second, and reference members together constitute the outer wall of the extension body, at which point the building unit is in the extended form.

[0016] During the process of the building unit switching between the contracted form and the expanded form, the first expansion member and / or the second expansion member currently moving moves along the same axis, and the same first expansion member and the same second expansion member move linearly along the same axis, and / or the same first expansion member and the same second expansion member rotate around the same axis once.

[0017] In some embodiments, the first extension member and the second extension member are further configured to:

[0018] Along the same axis and in the same direction, at least two of the first extensions currently performing linear movement move synchronously, or...

[0019] Along the same axis and in the same direction, at least two of the second extensions currently performing linear movement move synchronously, or...

[0020] Along the same axis and in the same direction, the first extension and the second extension, which are currently performing linear movement, move synchronously.

[0021] In some embodiments, the first extension member and the second extension member are further configured to:

[0022] Along the same axis in opposite directions, at least two of the first extensions currently performing linear movement move synchronously, or...

[0023] Along the same axis in opposite directions, at least two of the second extensions currently performing linear movement move synchronously, or...

[0024] Along the same axis but in opposite directions, the first extension and the second extension, which are currently performing linear movement, move synchronously.

[0025] In some embodiments, the first extension member and the second extension member are further configured to:

[0026] At least two of the first extensions currently performing rotational movement move synchronously in the same direction around the same axis, or...

[0027] In the same direction around the same axis, at least two of the second extensions currently performing rotational movement move synchronously, or...

[0028] The first extension and the second extension, which are currently rotating around the same axis, move synchronously in the same direction.

[0029] In some embodiments, the first extension member and the second extension member are further configured to:

[0030] In opposite directions around the same axis, at least two of the first extensions currently performing rotational movement move synchronously, or...

[0031] In opposite directions around the same axis, at least two of the second extensions currently performing rotational movement move synchronously, or...

[0032] The first extension and the second extension, which are currently rotating around the same axis, move synchronously in opposite directions.

[0033] In some implementations, the first extension is housed or partially housed within the base member.

[0034] In some embodiments, the extended body has opposing walls in each axis of the moving coordinate system, and the walls in the three axes enclose each other.

[0035] At least one of the first extension members, and / or at least one of the second extension members includes a first panel portion and a second panel portion that intersect each other, the first panel portion and the second panel portion being located on different sides of the extension body, and capable of synchronously performing linear or rotational movement.

[0036] In some embodiments, the frame has a base space, and during the switching of the building unit between the contracted form and the extended form, the first extension member and the second extension member remain outside the base space.

[0037] In some embodiments, in the extension body, the reference member is connected to either the first extension member or the second extension member in a single direction along any axis of the translation coordinate system; or,

[0038] In the extended body, the reference member is connected to at least one of the first extended member and the second extended member in two directions of any axis of the moving coordinate system.

[0039] In some embodiments, the first extension member and / or the second extension member move away from the reference member in a single direction along any axis of the moving coordinate system to form an extended form of the building unit.

[0040] In some embodiments, the first extension member and / or the second extension member are respectively moved away from the reference member in two directions along any one axis of the moving coordinate system to form an extended form of the building unit.

[0041] In some embodiments, in any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in a single direction along the aforementioned two axes to form an extended form of the building unit.

[0042] In some embodiments, in any two axes of the moving coordinate system, the first extension and / or the second extension moves away from the reference member in two directions along one of the axes and in a single direction along the other axis to form an extended form of the building unit.

[0043] In some embodiments, in any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in two directions along one of the axes and away from the reference member in two directions along the other axis to form an extended form of the building unit.

[0044] In some embodiments, in the three axes of the moving coordinate system, the first extension and / or the second extension are respectively moved away from the reference member in a single direction along the three axes to form an extended form of the building unit.

[0045] In some embodiments, in the three axes of the moving coordinate system, the first extension member and / or the second extension member are respectively moved away from the reference member in a single direction along two of the axes and away from the reference member in two directions along the remaining axis, to form an extended shape of the building unit.

[0046] In some embodiments, in the three axes of the moving coordinate system, the first extension member and / or the second extension member are respectively moved away from the reference member in two directions along two of the axes and away from the reference member in a single direction along the remaining axis, to form an extended shape of the building unit.

[0047] Based on the aforementioned building unit, this application also provides a building with expandable and retractable space, wherein the expandable building includes the aforementioned building unit.

[0048] The present invention also provides another embodiment of the building unit, which adopts the following technical solution:

[0049] A building unit with expandable and contractible space, the building unit having interchangeable contractible and expandable forms, and the building unit comprising:

[0050] A reference component, which has a base plane that can remain stationary;

[0051] Multiple first extension members are movably connected to each other, and at least one first extension member is movably connected to the reference member, enabling it to approach and move away from the reference member;

[0052] Multiple second extension members are movably connected to each other and are also movably connected to the first extension member, allowing them to move closer to and further away from the first extension member;

[0053] The first and second extension members are configured to move in a translation coordinate system consisting of three axes, wherein the first axis of the translation coordinate system is perpendicular to the base plane, and the second and third axes of the translation coordinate system are two axes orthogonal to the first axis; the movement of the first and second extension members is as follows:

[0054] The first extension performs linear movement along at least one axis and / or rotational movement about at least one axis, so that the first extension moves closer to and surrounds the reference member, thereby forming a frame, wherein the frame has opposing walls in each axis of the translation coordinate system and the walls in the three axes surround each other.

[0055] The second extension performs linear movement along at least one axis, and / or rotational movement about at least one axis, so that the second extension moves closer to the outside of the frame, at which point the building unit is in the contracted state;

[0056] The first and second extension members perform linear movement along at least one axial direction and / or rotational movement about at least one axial direction, causing them to move away from the reference member in two directions along the three axes, thereby enclosing and forming an extension body. The first and second extension members constitute the outer wall of the extension body, at which point the building unit is in the extended form.

[0057] During the process of the building unit switching between the contracted form and the expanded form, the first expansion member and / or the second expansion member currently moving moves along the same axis, and the same first expansion member and the same second expansion member move linearly along the same axis, and / or the same first expansion member and the same second expansion member rotate around the same axis once.

[0058] Based on the aforementioned building unit, this application also provides a building with expandable and retractable space, which includes a load-bearing block and the aforementioned building unit, wherein the load-bearing block is connected to the reference member.

[0059] Based on the two building units mentioned above, this application also provides a device for expanding and shrinking space, the device including the aforementioned building units.

[0060] Compared with existing technologies, the expandable and retractable building unit, building body, and equipment implemented in this application have the following advantages:

[0061] The building unit of this application achieves the deformation of the expandable space by controlling each first extension member and each second extension member to perform a linear movement along the same axis and / or a rotational movement around the same axis. This effectively reduces the difficulty and cost of achieving synchronous movement of the same first or second extension member. In this way, the building unit can achieve expansion or contraction deformation of space with simple and effective deformation actions and processes. This ensures that the accumulated error value remains within a suitable range during the switching between contraction and expansion states, thereby ensuring that the building unit can repeatedly and stably complete the deformation of the expandable space. Furthermore, the space deformation action is simple and reliable, making it suitable for widespread use in the civilian field. Simultaneously, this building unit ensures the control precision of the synchronous movement of the first and second extension members, greatly reducing the difficulty and cost of deformation of the expandable space, further improving the stability and reliability of the expandable space, and guaranteeing its safety.

[0062] Furthermore, by controlling the first and / or second extension members currently performing the movement to move along the same axis, the multi-dimensional movement required to achieve the three-dimensional deformation and opening / closing of the building unit during spatial deformation is decomposed into multiple one-dimensional movement actions. The linear or rotational movements performed by the first and second extension members are all one-dimensional movements and will not generate a two-dimensional motion focus inside the building unit. This effectively avoids the problem of motion focus hindering the expansion or contraction of the building unit, enabling the building unit to achieve the ability to deform and open / close in three-dimensional space, and greatly expanding the spatial expansion ratio that the building unit can achieve.

[0063] Furthermore, the building unit of this application uses a frame as the form reference for the contracted form, and the frame and the extended form have relatively arranged walls in each axis of the translation coordinate system, and the walls in the three axes enclose each other, so that the building unit has a relatively regular shape structure. In this way, the building unit can easily and effectively switch to the extended form based on the one-dimensional movement of the first extended part and the second extended part, thus providing a safe, effective, simple and reliable three-dimensional space expansion method for buildings with expandable space. Moreover, the relatively regular shape structure of the building unit itself allows the reference part, the first extended part and the second extended part to be configured and produced with a standardized structure. This not only makes the building unit suitable for large-scale standardized production, but also reduces the production cost of buildings with expandable space, making the building unit suitable for promotion and application in the civil field.

[0064] Furthermore, the building unit of this application, through the frame formed by the cooperation of multiple first extension members and the reference member, or the frame formed by the cooperation of multiple first extension members, can have an internal space that is not interfered with during the switching between the contracted and extended forms. In this way, the building unit can utilize the internal space of the frame to pre-configure the furniture and necessities required for the user's life, thereby making the building unit more suitable for the user's living and more suitable for civilian promotion.

[0065] Furthermore, by controlling each first extension member and each second extension member to perform a linear or rotational movement along the same axis, the building unit of this application limits the number of times each first extension member and each second extension member can move linearly along each axis or rotate around each axis. In this way, when the building unit performs expansion deformation at several times the expansion ratio, the first and second extension members can expand and deform in an orderly manner. The building unit can complete multiple expansion deformations with a simple and effective deformation path. Moreover, by controlling each first extension member and / or each second extension member to move synchronously along the same axis, the building unit can effectively save the steps of shrinkage deformation or expansion deformation when switching between shrinkage and expansion modes, thereby saving the steps of deformation control of the building unit, further reducing the deformation difficulty and deformation cost of the expandable space, and improving the stability and reliability of the expandable space.

[0066] The building structure and equipment in this application both include the aforementioned building structure units and possess the same beneficial effects as the aforementioned building structure units. Attached Figure Description

[0067] Figure 1 is a schematic diagram of the building unit in a contracted state in Embodiment 1 of this application;

[0068] Figure 2 is a schematic diagram of the first step of the self-shrinking form unfolding of the building unit in Embodiment 1 of this application;

[0069] Figure 3 is a schematic diagram of the second step of the self-shrinking form unfolding of the building unit in Embodiment 1 of this application;

[0070] Figure 4 is a schematic diagram of the third step of the self-shrinking form unfolding of the building unit in Embodiment 1 of this application;

[0071] Figure 5 is a schematic diagram of the fourth step of the self-shrinking form unfolding of the building unit in Embodiment 1 of this application;

[0072] Figure 6 is a schematic diagram of the building unit in the extended form in Embodiment 1 of this application;

[0073] Figure 7 is a partial structural schematic diagram of the frame body in Embodiment 1 of this application;

[0074] Figure 8 is a schematic diagram of the building unit expanding into two spatial grids in Embodiment 1 of this application;

[0075] Figure 9 is a schematic diagram of the building unit being expanded into three spatial cells in Embodiment 1 of this application;

[0076] Figure 10 is a schematic diagram of the building unit being expanded into four spatial cells in Embodiment 1 of this application;

[0077] Figure 11 is a schematic diagram of the building unit expanding into six spatial cells in Embodiment 1 of this application;

[0078] Figure 12 is a schematic diagram of the building unit being expanded into nine spatial cells in Embodiment 1 of this application;

[0079] Figure 13 is a schematic diagram of the building unit expanded into eight spatial cells in Embodiment 1 of this application;

[0080] Figure 14 is a schematic diagram of the building unit being expanded into eighteen spatial cells in Embodiment 1 of this application;

[0081] Figure 15 is a schematic diagram of the building unit expanded into twenty-seven spatial cells in Embodiment 2 of this application;

[0082] Figure 16 is a schematic diagram of the cooperation between the building unit and the load-bearing part in Embodiment 2 of this application;

[0083] Figure 17 is a schematic diagram of the building unit in an expanded form in Embodiment 3 of this application;

[0084] Figure 18 is a schematic diagram of the building unit in a contracted state in Embodiment 3 of this application;

[0085] Figure 19 is an internal schematic diagram of the building unit in a contracted state in Embodiment 3 of this application;

[0086] Figure 20 is a partial structural schematic diagram of the frame body in Embodiment 3 of this application;

[0087] Figure 21 is a schematic diagram of the base plate assembly in the retracted state in Embodiment 3 of this application;

[0088] Figure 22 is a schematic diagram of the base plate assembly in an extended form in Embodiment 3 of this application;

[0089] Figure 23 is a schematic diagram of the top plate assembly in the retracted state in Embodiment 3 of this application;

[0090] Figure 24 is a schematic diagram of the top plate assembly in an extended form in Embodiment 3 of this application;

[0091] Figure 25 is a schematic diagram of the first top plate component in Embodiment 3 of this application;

[0092] Figure 26 is a schematic diagram of the side panel assembly in the retracted state in Embodiment 3 of this application;

[0093] Figure 27 is a schematic diagram of the first upper left side plate, the first lower left side plate, the second upper left side plate, and the second lower left side plate in a contracted state in Embodiment 3 of this application.

[0094] In the diagram, 100 represents the building unit; X represents the first axis; Y represents the second axis; Z represents the third axis; 200 represents the frame; and 300 represents the extension.

[0095] 1. Base component; 1a. Foundation plane; 1b. First plate section; 1c. Second plate section; 2. First extension component; 2a. First plate body; 2b. Second plate body; 2c. Third plate body; 3. Second extension component; 3a. Fourth plate body; 3b. Fifth plate body; 3c. Sixth plate body; 3d. Seventh plate body; 3e. Eighth plate body; 3f. Ninth plate body; 3g. Tenth plate body; 3h. Eleventh plate body; 3i. Twelfth plate body; 3j. Thirteenth plate body; 3k. Fourteenth plate body; 3l. Fifteenth plate body; 4. Foundation space; 5. Base plate assembly; 5a. First base plate component; 5b. Second base plate component; 5c. Third base plate component; 5d. Fourth base plate component; 50d. Fourth front plate section; 51d. Fourth middle plate section; 52d. Fourth rear plate section 5. Panel section; 5e. Fifth base plate component; 5f. Sixth base plate component; 6. Side panel assembly; 6a. First upper left side panel; 60a. First left side panel section; 61a. First rear side panel section; 6b. First lower left side panel; 6c. Second upper left side panel; 6d. Second lower left side panel; 6e. First upper right side panel; 6f. First lower right side panel; 6g. Second upper right side panel; 6h. Second lower right side panel; 7. Top panel assembly; 7a. First top panel component; 70a. First top panel section; 71a. First end panel section; 7b. Second top panel component; 7c. Third top panel component; 7d. Fourth top panel component; 7e. Fifth top panel component; 7f. Sixth top panel component; 8. First panel section; 9. Second panel section; 10. Load-bearing component; 11. Balcony assembly; 12. Electrical assembly. Detailed Implementation

[0096] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0097] In the description of this invention, it should be understood that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to that other element. The terms "mounted," "connected," and "attached" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements or an interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0098] In the description of this invention, it should be understood that the terms "height," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this invention to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0099] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0100] Example 1

[0101] Referring to Figures 1-14, Embodiment 1 of the present invention provides a building unit 100 with expandable and retractable space, which provides users with a space to enter and engage in activities. It includes a base member 1 and an expansion component. The base member 1 has at least a base plane 1a that can remain stationary. The expansion component can move relative to the base member 1 to move closer to and away from the base member 1, thereby enabling the building unit 100 to expand or contract. By expanding, the building unit 100 can expand its internal space, thereby providing users with ample activity or living space. By contracting, the building unit 100 can shrink its occupied space, thereby reducing its volume and facilitating the user's relocation of the building unit 100.

[0102] The base plane 1a serves as the origin of the building unit 100 for extension or contraction deformation. During the extension or contraction deformation of the building unit 100, it can maintain its position and shape so that the extension component can expand in a direction away from the reference member 1 to achieve extension deformation or contraction deformation in a direction closer to the reference member 1.

[0103] The shape of the reference component 1 is varied; it can be composed of multiple plates or a single plate. Based on its shape and structure, the reference component 1 can define a space with a certain volume, limited by its structural boundaries. Using this space, the reference component 1 can accommodate the first extension component 2, either completely or partially. Of course, depending on how the first extension component 2 is accommodated, the second extension component 3 may also be accommodated or partially accommodated within this space.

[0104] Understandably, to ensure that the expansion component can be accommodated within this space, the space is generally a semi-open space with open channels for the expansion component to enter and exit, allowing it to approach and move away from the reference component 1. The number and orientation of the open channels are related to the shape and deformation path of the building unit 100 during extension and contraction deformation, and can be set according to specific circumstances. Of course, in other examples, this space can also be a closed space. For instance, if the reference component 1 is an electrical unit, it may employ a closed structure to protect the internal electrical components. In this case, the expansion component can achieve contraction deformation of the reference unit by approaching and moving closer to the outer wall of the reference component 1.

[0105] Based on the extension and contraction deformation of the building unit 100, the building unit 100 has interchangeable contraction and extension modes. The extension component, as the actuating part of the building unit 100 to achieve extension and contraction deformation, includes multiple first extension members 2 and multiple second extension members 3. Each first extension member 2 and each second extension member 3 can be composed of multiple plates or a single plate. The multiple first extension members 2 are movably connected to each other or to a reference member 1, allowing the first extension members 2 to move closer to and further away from the reference member 1, thus forming a frame 200. The multiple second extension members 3 are movably connected to each other, and the second extension members 3 are also movably connected to the first extension members 2, allowing the second extension members 3 to move closer to and further away from the first extension members 2; or, the second extension members 3 are also movably connected to the reference member 1, allowing the second extension members 3 to move closer to and further away from the reference member 1, thereby allowing the second extension members 3 to approach the outer side of the frame 200, thus forming the contraction mode of the building unit 100. Of course, in order to reduce the space occupied by the building unit 100 in the contracted form, the second extension 3 can be attached to or close to the outside of the frame 200.

[0106] It should be noted that while multiple first expansion members 2 may be movably connected to each other, or multiple first expansion members 2 may be movably connected to the base member 1, it is not required that all first expansion members 2 be movably connected to each other, or all first expansion members 2 be movably connected to the base member 1. For example, in a building unit 100, there are ten first expansion members 2. Depending on the modified configuration of the building unit 100, six first expansion members 2 may be movably connected to each other, and the remaining four may be movably connected to the base member 1. Of course, depending on the modified configuration of the building unit 100, it is also feasible for all first expansion members 2 to be movably connected to each other, or for all first expansion members 2 to be movably connected to the base member 1. The same applies to the second expansion member 3.

[0107] As an example of this embodiment, referring to Figures 1-6, the first extension member 2 includes a first plate 2a, a second plate 2b, and a third plate 2c, and the second extension member 3 includes a fourth plate 3a, a fifth plate 3b, a sixth plate 3c, a seventh plate 3d, an eighth plate 3e, a ninth plate 3f, a tenth plate 3g, an eleventh plate 3h, a twelfth plate 3i, a thirteenth plate 3j, a fourteenth plate 3k, and a fifteenth plate 3l. The outer contours of the first plate 2a, the second plate 2b, and the third plate 2c are all L-shaped and are composed of two connected plates. The outer contours of the twelfth plate 3i, the thirteenth plate 3j, the fourteenth plate 3k, and the fifteenth plate 3l are planar structures and are composed of a single plate. When the building unit 100 is in a contracted state, the reference member 1 cooperates with the first plate 2a, the second plate 2b, and the third plate 2c to form a frame 200.

[0108] It should be noted that in Figures 1-14, the outer contour edges of the first plate 2a to the fifteenth plate 3l in the aforementioned example are aligned to facilitate the presentation of the outer contour shapes of the frame 200 and the extension 300. This does not imply that the outer contour edges of the frame 200 and the extension 300 must be aligned.

[0109] The frame 200 has opposing walls along each axis of the translation coordinate system, and the walls along the three axes enclose each other. It is understood that these walls are the structures that enclose and separate the internal space of the frame 200, equivalent to the walls of a building. As an example of this embodiment, the frame 200 may be a hexahedral structure, and this hexahedral structure may be a cuboid structure, a cube structure, or other irregular hexahedral shapes. Furthermore, the outer wall of the first extension member 2 does not necessarily match the outer wall of the reference member 1. Moreover, the specifications and dimensions of each first extension member 2 and each second extension member 3 are not necessarily the same. For example, as an illustration, the thickness of the outer wall of the reference member 1 may be greater than the thickness of the first extension member 2, so that the outer wall of the reference member 1 protrudes from the outer wall of the first extension member 2. Alternatively, the first extension member 2 may be partially housed within the space of the reference member 1, so that other parts of the first extension member 2 are exposed. However, for the frame body 200, the reference member 1 and the multiple first extension members 2 will still constitute its outer wall, and the outer walls of the frame body 200 generally remain orthogonal or nearly orthogonal to each other, so that the outer contour of the frame body 200 presents a hexahedral structure.

[0110] The shape of the first extension member 2 is diverse. When the first extension member 2 and the reference member 1 cooperate to form the frame 200, different shapes of the first extension member 2 and the reference member 1 will produce different cooperation methods. For example, when the first extension member 2 is only a single flat plate structure, the first extension member 2 can form the side wall of the frame 200 as a whole; when the first extension member 2 is a bent structure of multiple connected planar structures, the first extension member 2, either entirely or partially, forms the side wall of the frame 200, and the remaining part is built into the internal space of the frame 200. It can be understood that within the same building unit 100, multiple first extension members 2 can each have a single flat plate structure or a bent structure of multiple connected planar structures. Multiple first extension members 2 with different shapes can cooperate with each other to form the frame 200 with the reference member 1.

[0111] It is understandable that, as a structural component of the building, the reference member 1, the first extension member 2, and the second extension member 3 of the building unit 100 all possess a certain structural strength to meet the required load-bearing capacity. During the expansion or contraction deformation of the building unit 100, the reference member 1, the first extension member 2, and the second extension member 3 should not interfere with each other to ensure that they do not collide or get damaged. Therefore, when the building unit 100 undergoes contraction deformation, especially when it undergoes multi-fold expansion and contraction deformation, multiple layers of structure, namely the second extension member 3, will be superimposed on the outer layer of the frame 200.

[0112] Furthermore, as a structural component of the building, the base component 1, the first extension component 2, and the second extension component 3 of this building unit 100 have a certain weight. Considering the accuracy of synchronous control, it is a feasible spatial deformation method for the first extension component 2, the second extension component 3, and the base component 1 to be spliced ​​together in a mutually orthogonal manner. Therefore, after multiple first extension components 2 move toward the base component 1 and converge into the foundation space 4, the frame 200 formed by the base component 1 has relatively arranged walls in each axis of the moving coordinate system.

[0113] Of course, the shape of the reference component 1 is also diverse. The reference component 1 can be set according to the form of the building unit 100 to achieve extension deformation or contraction deformation. For example, the reference component 1 can have one or more basic planes 1a to form any one or more adjacent sides of the frame body 200, and the axis corresponding to the other sides of the frame body 200 is used as the axis of passage of the expansion component during the spatial deformation process.

[0114] Referring to Figure 7, a frame 200 is formed by the cooperation of the first extension member 2 and the reference member 1. The interior of the frame 200 forms a space with a certain volume, namely the base space 4. Depending on the cooperation between the reference member 1 and the first extension member 2, this base space 4 may be limited by the structural boundary of the reference member 1, or it may be smaller than the structural boundary of the reference member 1. It is understood that when the building unit 100 switches between its contracted and extended forms, the base space 4 inside the frame 200 can remain unpenetrated and uninterrupted. Thus, when the building unit 100 switches between its contracted and extended forms, the extension components remain outside the base space 4 and do not enter it. The building unit 100 can utilize the base space 4 to arrange furniture needed for the user's life. Furthermore, since the extension components remain outside the base space 4 during the form switching of the building unit 100, this furniture will not be damaged during the deformation of the building unit 100.

[0115] Referring to Figure 5, as an example of this embodiment 1, the reference member 1 includes a first plate portion 1b and a second plate portion 1c that are adjacent to each other. The first plate portion 1b and the second plate portion 1c are orthogonally connected to each other, such that the reference member 1 defines a semi-open space with the boundaries of the first plate portion 1b and the second plate portion 1c that matches the length and width of the first plate portion 1b and the height of the second plate portion 1c. Moreover, when the reference member 1 and the first extension member 2 cooperate to form the frame body 200, the first plate portion 1b and the second plate portion 1c constitute the bottom surface and one of the side surfaces of the frame body 200. The other surfaces (i.e., the top surface and other side surfaces of the frame body 200) that are arranged opposite to the reference member 1 are formed by the first extension member 2. Furthermore, the axial direction corresponding to the top surface and other side surfaces of the frame body 200 is the axial direction of the first extension member 2 towards and away from the reference member 1. Therefore, the plane where the first plate part 1b is located can be used as the base plane 1a, and the axis perpendicular to the base plane 1a can be used as the first axis X. The first axis X, the second axis Y and the third axis Z which are orthogonal to the first axis X can form a translation coordinate system, which can be used as the axis for the first extension 2 and the second extension 3 to perform spatial deformation.

[0116] It should be noted that the translation coordinate system based on the first axis X, the second axis Y, and the third axis Z is a three-dimensional coordinate system. Although the reference component 1 may have one or more base planes 1a depending on its shape, the reference component 1 is a component of the frame 200, and the frame 200 has opposing walls in each axis of the translation coordinate system, with the walls enclosing each other in the three axes. Therefore, even if the reference component 1 has multiple base planes 1a, these planes will be orthogonally arranged. Thus, a translation coordinate system based on any one base plane 1a will always correspond to the width, length, and height axes of the frame 200. Of course, in any axis of the translation coordinate system, each axis has two opposite directions.

[0117] Based on this moving coordinate system, when the building unit 100 switches from a contracted state to an expanded state, the second expansion member 3 and the first expansion member 2 can be configured to move in the following manner within the moving coordinate system formed by the first axis X, the second axis Y, and the third axis Z:

[0118] The first extension member 2 performs linear movement along at least one axis and / or rotational movement about at least one axis, so that the first extension member 2 approaches the reference member 1 and cooperates with the reference member 1 to form a frame body 200; the second extension member 3 performs linear movement along at least one axis and / or rotational movement about at least one axis, so that the second extension member 3 moves closer to the outside of the frame body 200, at which time the building unit 100 is in a contracted state.

[0119] The first extension member 2 and the second extension member 3 perform linear movement along at least one axis and / or rotational movement about at least one axis, moving them away from the reference member 1, thereby enclosing the extension body 300 with the reference member 1. The first extension member 2, the second extension member 3, and the reference member 1 together constitute the outer wall of the extension body 300. At this time, the building unit 100 is in an extended state, and the internal space of the extension body 300 is larger than the internal space of the frame body 200.

[0120] During the process of switching between the contracted and expanded forms of the building unit 100, the first expansion member 2 and / or the second expansion member 3 currently moving moves along the same axis, and the same first expansion member 2 and the same second expansion member 3 perform linear movement along the same axis, and / or, the same first expansion member 2 and the same second expansion member 3 perform rotational movement around the same axis once.

[0121] Referring to Figures 1-7, as an example of this embodiment, after the first extension member 2 and the second extension member 3 are unfolded, the movement path from the first plate 2a to the fifteenth plate 3l is as follows:

[0122] The first plate 2a rises along the first axis X, thus moving away from the reference member 1 and above the reference member 1; the fourth plate 3a rises along the first axis X and moves along the second axis Y to the right of the first plate 2a; the fifth plate 3b rises along the first axis X and moves along the second axis Y to the left of the first plate 2a, opposite to the fourth plate 3a; the eighth plate 3e moves along the second axis Y, thus moving away from the reference member 1 and to the right of the reference member 1; the ninth plate 3f moves along the second axis Y, thus moving away from the reference member 1 and to the left of the reference member 1, opposite to the eighth plate 3e; the tenth plate 3g moves along the third axis Z, thus moving away from the reference member 1 and in front of the reference member 1; the sixth plate 3c moves along the third axis Z and along the second axis Y, moving to the right of the tenth plate 3g; the seventh plate 3d moves along the third axis Z and along the second axis Y, moving to the left of the tenth plate 3g; the second plate 2b moves along the third axis X and along the second axis Y, moving to the left of the tenth plate 3g; the second plate 2b moves along the third axis X and along the second axis Y, moving to the right of the tenth plate 3g; the seventh plate 3d moves along the third axis Z and along the second axis Y, moving to the left of the tenth plate 3g; the second plate 2b moves along the third axis X and along the second axis Y, moving to the right of the tenth plate 3g; the eighth plate 3e moves along the second axis Y, thus moving away from the reference member 1 and to the right of the reference member 1; the ninth plate 3f moves along the second axis Y, thus moving away from the reference member 1 and to the left of the reference member 1; the tenth plate 3g moves along the third axis Z and along the second axis Y, moving to the right of the tenth plate 3g; the second plate 2b moves along the third The first plate 3c moves along the Z-axis, the second Y-axis, and the first X-axis, thus moving above the sixth plate 3c; the third plate 2c moves along the Z-axis, the second Y-axis, and the first X-axis, thus moving above the seventh plate 3d; the eleventh plate 3h moves along the Z-axis and the first X-axis, thus moving above the tenth plate 3g; the twelfth plate 3i moves along the Z-axis, the second Y-axis, and the first X-axis, thus moving above the third plate 2c; the thirteenth plate 3j moves along the Z-axis, the second Y-axis, and the first X-axis, thus moving above the second plate 2b; the fourteenth plate 3k moves along the second Y-axis and the first X-axis, thus moving above the fifth plate 3b; and the fifteenth plate 3l moves along the second Y-axis and the first X-axis, thus moving above the fourth plate 3a.

[0123] Referring to Figures 1-7, the outer contour of the extension body 300 has a hexahedral structure, and the projections of the frame body 200 and the extension body 300 on each reference plane of the moving coordinate system are square. The first extension member 2, the second extension member 3, and the reference member 1 constitute the outer wall of the extension body 300.

[0124] It should be noted that Figures 1-7 are only used to illustrate the form transition of the building unit 100 from a contracted to an expanded form. The overlapping structure of the first expansion member 2 and the second expansion member 3 in space is not shown in Figures 1-7. For example, in Figures 1 to 6, the second plate 2b and the sixth plate 3c are in the same space. In this case, the second plate 2b is fitted over the sixth plate 3c, so that the sixth plate 3c is built inside the second plate 2b. Therefore, the outline of the second plate 2b is shown in Figure 1. Of course, in other examples, the second plate 2b and the sixth plate 3c can also be stacked inside and outside or in other ways so that the two plates moving to the same space do not interfere with each other.

[0125] Multiple first extension members 2 and multiple second extension members 3 can perform linear movement or rotational movement only, thereby switching the building unit 100 from a contracted state to an expanded state. Alternatively, multiple first extension members 2 and multiple second extension members 3 can each perform linear and rotational movements respectively, thereby switching the building unit 100 from a contracted state to an expanded state. It should be noted that the same first extension member 2 and the same second extension member 3 can only perform linear or rotational movement once along the same axis. Therefore, during a single spatial deformation process, once any first extension member 2 or any second extension member performs linear or rotational movement along the first axis X, it will not perform linear or rotational movement again along the first axis X. By constraining the number of times the first extension members 2 and second extension members 3 perform linear or rotational movements, the deformation path of the building unit 100 can be limited, and the stability and reliability of the spatial deformation of the building unit 100 can be guaranteed.

[0126] For example, taking the first axis X indicating the height axis of the extension body 300, the second axis Y indicating the width axis of the extension body 300, and the third axis Z indicating the length axis of the extension body 300 as examples, in the case of the building unit 100 switching from the contraction mode to the expansion mode, taking the first extension member 2 as an example, in the same axis, the number of times the same first extension member 2 performs linear movement or rotational movement is one, which will cause any first extension member 2 to perform linear movement in any direction along the first axis X. After the first extension member 2 reaches the movement stroke of this linear movement, the first extension member 2 reaches the boundary of the extension body 300 in the height axis, so that the first extension member 2 completes the extension deformation in the height axis through one movement action. Moreover, by superimposing the linear movement in any direction of the second axis Y and the linear movement in any direction of the third axis Z, the first extension member 2 can reach the boundary of the extension body 300 in the length axis, width axis, and height axis, thereby forming the outer wall of the extension body 300.

[0127] The building unit 100 is configured with multiple first expansion members 2 and multiple second expansion members 3, and controls the first expansion members 2 and the second expansion members 3 to perform a linear or rotational movement in the same axis to complete the deformation of the expandable space. This effectively reduces the difficulty and cost of achieving synchronous movement of the same first expansion member 2 and the second expansion member 3. Furthermore, through the cooperation of multiple first expansion members 2 and multiple second expansion members 3, the first expansion members 2 and the second expansion members 3 respectively form the outer wall structure in the corresponding form, completing the enclosure of the engineering building. This allows the building unit 100 to switch between a contraction form and an expansion form, so that the hexahedral closed space in the contraction form expands into a hexahedral closed space in the expansion form, or the hexahedral closed space in the expansion form contracts into a hexahedral closed space in the contraction form.

[0128] Furthermore, during the switching between the contracted and expanded forms of the building unit 100, the building unit 100 undergoes multiple deformation steps, which are generally executed sequentially. In each deformation step, the first expansion member 2 and / or the second expansion member 3, which are currently moving, move along the same axis. In this way, the deformation action performed by the building unit 100 in each deformation step is a one-dimensional movement action, thereby reducing the difficulty of controlling the three-dimensional spatial deformation opening and closing of the building unit 100 to the difficulty of controlling one-dimensional movement.

[0129] For example, taking the first axis X as the height axis of the extension body 300, the second axis Y as the width axis of the extension body 300, and the third axis Z as the length axis of the extension body 300, in the case where the building unit 100 switches from the contracted form to the extended form, the number of first extension members 2 that perform the movement action in a certain deformation step is two. Then, in this deformation step, the two first extension members 2 will move along the same axis, such as moving together along the first axis X. After the two first extension members 2 move together along the first axis X once, they reach the preset position of the two along the first axis X. Then, the building unit 100 performs the next deformation step.

[0130] It is understandable that when multiple first extension members 2 and multiple second extension members 3 move to the target position, i.e., the corresponding outer wall position of the extension body 300, along the first axis X, the second axis Y, and the third axis Z of the moving coordinate system, there may be partial overlap in the movement paths between the multiple first extension members 2, between the multiple second extension members 3, and between the first extension members 2 and the second extension members 3. Considering the uniformity of synchronous control, as an example of this embodiment 1, the second extension members 3 and the first extension members 2 can be configured to have multiple synchronous movement modes:

[0131] (1) At least two first extension members currently performing linear movement move synchronously in the same direction along the same axis, or at least two second extension members currently performing linear movement move synchronously in the same direction along the same axis, or the first extension member and the second extension member currently performing linear movement move synchronously in the same direction along the same axis.

[0132] (2) At least two first extensions currently performing linear movement move synchronously in opposite directions along the same axis, or at least two second extensions currently performing linear movement move synchronously in opposite directions along the same axis, or the first extension and the second extension currently performing linear movement move synchronously in opposite directions along the same axis.

[0133] (3) At least two first extension members currently performing rotational movement move synchronously in the same direction around the same axis, or at least two second extension members currently performing rotational movement move synchronously in the same direction around the same axis, or the first extension member and the second extension member currently performing rotational movement move synchronously in the same direction around the same axis.

[0134] (4) At least two first extensions currently performing rotational movement move synchronously in opposite directions around the same axis, or at least two second extensions currently performing rotational movement move synchronously in opposite directions around the same axis, or the first extension and second extensions currently performing rotational movement move synchronously in opposite directions around the same axis.

[0135] Furthermore, as a supplement to this example, the first extension 2 and the second extension 3, which perform synchronous movement or synchronous flipping, have the same movement angle and the same movement speed.

[0136] Referring to Figures 1-6, taking the transformation of the building unit 100 from the contracted form shown in Figure 1 to the expanded form shown in Figure 6 as an example, the building unit 100 in the expanded form shown in Figure 1 can be divided into multiple spatial cells. Each spatial cell is divided by the boundaries of the first expansion member 2, the second expansion member 3, and the reference member 1, or by the intersection between them. In this way, the building unit 100 can be regarded as having one spatial cell in the contracted form and multiple spatial cells in the expanded form. Furthermore, the multiple of the number of spatial cells in the expanded form relative to the number of spatial cells in the contracted form (i.e., 1) is the spatial expansion ratio of the building unit 100.

[0137] Referring to Figure 6, during the process of the building unit 100 switching from the contracted state to the expanded state, the second plate 2b moves linearly once along the first axis X, moves linearly once along the second axis Y, and moves linearly once along the third axis Z, so that the second plate 2b constitutes the outer wall of the corner of the building unit 100 shown in Figure 6. The third plate 2c moves linearly once along the second axis Y and once along the third axis Z, forming the outer wall of the corner of the building unit 100 shown in Figure 6. Obviously, both the second plate 2b and the third plate 2c move linearly along the second axis Y and the third axis Z, and their linear movements along the first axis X and the second axis Y are in the same direction. In this way, when the second plate 2b moves linearly along the first axis X and the second axis Y, it can move synchronously with the third plate 2c, so that the building unit 100 can complete the spatial expansion with a simpler deformation step. In addition, this also makes the synchronous control of the building unit 100 more convenient.

[0138] Of course, by using bidirectional driven mechanical components, such as bidirectional cylinders, the second extension 3 and the first extension 2 can also be configured such that the first extension 2 and the second extension 3 move synchronously in the same axial direction and in opposite directions, performing linear movement.

[0139] In different building units 100, based on the differences in shape and structure of the first extension member 2 and the second extension member 3, different building units 100 will have different deformation paths, so that the first extension member 2 and the second extension member 3, the first extension member 2 and another first extension member 2, and the second extension member 3 and another second extension member 3 may all have movement paths on the same axis and in the same or opposite directions, so that the first extension member 2 and the second extension member 3, the first extension member 2 and another first extension member 2, and the second extension member 3 and another second extension member 3 can all move or flip synchronously, and during the synchronous movement or synchronous flipping process, the corresponding first extension member 2 and the second extension member 3 have the same movement angle and the same movement speed.

[0140] It is understandable that the stability, load-bearing reliability, and internal space enclosure of the building unit 100 in its extended form all affect the user experience. Therefore, in the extended body 300, the corresponding structures at its corner or bottom positions can be designed with a non-flipping structure, such as placing a single first extended member 2, a single second extended member 3, or a reference element at the corner position.

[0141] Referring to Figure 6, as an example of Embodiment 1, the outline of the extender 300 is a square hexahedron, which has opposing walls in each axis of the translation coordinate system, and the walls in the three axes enclose each other. The second plate 2b serves as the first extender 2 located at the corner of the extender 300, and the fourth plate 3a serves as the second extender 3 located at the corner of the extender 300. Both include a first panel 8 and a second panel 9 that intersect each other. The first panel 8 and the second panel 9 are located on different sides of the extender 300 and can perform linear or rotational movements synchronously. In this way, in the extender 300, at least two adjacent sides at its corner position are interconnected plates, avoiding the corner position of the extender 300 from being affected by excessive flipping and splicing, which would affect the closure.

[0142] It is understandable that by controlling the first extension member 2 and the second extension member 3 to perform only one linear or rotational movement in the same axis, the building unit 100 expands two or three spatial grids in the same axis starting from the reference member 1. Thus, in the extended body 300, in any single direction of any axis of the translation coordinate system, the reference member 1 is connected to the side of the first extension member 2 or the second extension member 3; or, in two directions of any axis of the translation coordinate system, the reference member 1 is connected to at least one of the first extension member 2 and the second extension member 3, such that the reference member 1 is positioned between any two of the first extension member 2 or the second extension member 3. Furthermore, depending on the number of axes in which the multiple first extension members 2 and the multiple second extension members 3 perform linear or rotational movements, the building unit 100 can form extended bodies 300 with different expansion ratios.

[0143] For example, referring to Figure 6, in the three axes of the moving coordinate system, the first extension member 2 and / or the second extension member 3 move away from the reference member 1 in a single direction along two of the axes, and move away from the reference member 1 in two directions along the remaining axis, so as to form an expanded form of the building unit 100. In this way, the number of spatial cells of the building unit 100 is expanded from one spatial cell in the contracted form to twelve spatial cells in the expanded form, achieving a twelve-fold expansion ratio.

[0144] Alternatively, the first extension member 2 and / or the second extension member 3 can move away from the reference member 1 in a single direction along any axis of the moving coordinate system to form an expanded form of the building unit 100. As an example of this embodiment 1, the extension components move away from the reference member 1 in a single direction along the third axis Z, the second axis Y, or the first axis X to form an expanded form of the building unit 100. Taking the second axis Y as an example, referring to FIG8, multiple first extension members 2 and multiple second extension members 3 perform a linear movement in the same direction along the second axis Y, so that the first extension members 2 and the second extension members 3 move away from the reference member 1 and form an extended body 300 with a cuboid structure in the outer contour. In this way, the number of spatial cells of this building unit 100 is expanded from one spatial cell in the contracted form to two spatial cells in the expanded form, achieving a two-fold expansion ratio.

[0145] Of course, the expansion component can also move along the second axis Y or the first axis X, so that the building unit 100 can expand along the width axis or the height axis. Alternatively, the expansion component can rotate and move away from the reference member 1. Moreover, the number of the first expansion member 2 and the second expansion member 3 can be set according to the shape of the first expansion member 2 and the second expansion member 3, so that the frame body 200 and the expansion body 300 can maintain the hexahedral structure. This will not be elaborated further here.

[0146] It should be noted that the volumes of the two spatial cells in the extended form are not necessarily equal. The volume of each spatial cell depends on the dimensions of the first extension component 2, the second extension component 3, and even the base component 1 that make up each spatial cell.

[0147] Alternatively, the first extension member 2 and / or the second extension member 3 move away from the reference member 1 in two directions along any one axis of the translation coordinate system to form an expanded form of the building unit 100. As another example of this embodiment 1, along the third axis Z, the second axis Y, or the first axis X, the extension components move away from the reference member 1 in two directions along the same axis to form an expanded form of the building unit 100. Taking the second axis Y as an example, referring to FIG9, multiple first extension members 2 and multiple second extension members 3 perform a linear movement in two directions along the second axis Y, forming an extended body 300 with a cuboid outer contour. In this way, the number of spatial cells in the building unit 100 expands from one spatial cell in the contracted form to three spatial cells in the expanded form, achieving a three-fold expansion ratio.

[0148] Alternatively, in any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in a single direction along the aforementioned two axes to form an expanded form of the building unit. Referring to FIG10, as an example of this embodiment 1, along any two axes of the third axis Z, the second axis Y, or the first axis X, the extension components move away from the reference member 1 in a single direction along the aforementioned two axes to form an expanded form of the building unit 100. Taking the third axis Z and the second axis Y as examples, referring to FIG10, multiple first extension members 2 and multiple second extension members 3 perform a linear movement or a rotational movement around the third axis Z in the same direction, and perform a linear movement or a rotational movement around the second axis Y in the same direction, forming an extended body 300 with a cuboid outer contour. In this way, the number of spatial cells of the building unit 100 is expanded from one spatial cell in the contracted form to four spatial cells in the expanded form, achieving a fourfold expansion ratio.

[0149] Alternatively, in any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in two directions along one of the axes and in a single direction along the other axis to form an extended shape of the building unit. Referring to FIG11, as an example of this embodiment 1, along any two axes of the third axis Z, the second axis Y, or the first axis X, the extension component moves away from the reference member 1 in two directions along either of the aforementioned two axes and in a single direction along the other of the aforementioned two axes to form an extended shape of the building unit 100. Taking the third axis Z and the second axis Y as examples, referring to FIG11, a plurality of first extension members 2 and a plurality of second extension members 3 perform a linear movement or a rotational movement around the third axis Z in two directions, and perform a linear movement or a rotational movement around the second axis Y in one direction, forming an extension body 300 with a cuboid structure in the outer contour. In this way, the number of spatial cells in the building unit 100 is expanded from one spatial cell in the contracted form to six spatial cells in the expanded form, achieving a six-fold expansion ratio.

[0150] Alternatively, in any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in two directions along one axis and in two directions along the other axis to form an expanded form of the building unit. Referring to FIG12, as an example of this embodiment 1, along any two axes of the third axis Z, the second axis Y, or the first axis X, the extension components move away from the reference member 1 in two directions along the aforementioned two axes to form an expanded form of the building unit 100. Taking the third axis Z and the second axis Y as examples, referring to FIG12, multiple first extension members 2 and multiple second extension members 3 perform a linear movement or a rotational movement around the third axis Z in two directions, and perform a linear movement or a rotational movement around the second axis Y in two directions, forming an extended body 300 with a cuboid outer contour. In this way, the number of spatial cells of the building unit 100 is expanded from one spatial cell in the contracted form to nine spatial cells in the expanded form, achieving a nine-fold expansion ratio.

[0151] Alternatively, in the three axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in a single direction along each of the three axes to form an expanded form of the building unit. Referring to FIG13, as an example of this embodiment 1, the extension components move away from the reference member 1 in a single direction along the third axis Z, the second axis Y, and the first axis X to form an expanded form of the building unit 100. Referring to FIG13, a plurality of first extension members 2 and a plurality of second extension members 3 perform a linear movement or a rotational movement around the third axis Z in one direction, and perform a linear movement or a rotational movement around the second axis Y in one direction, and perform a linear movement or a rotational movement around the second axis Y in one direction, thereby forming an expanded body 300 with a cubic structure in its outer contour. In this way, the number of spatial cells of the building unit 100 is expanded from one spatial cell in the contracted form to eight spatial cells in the expanded form, achieving an expansion ratio of eight times.

[0152] Alternatively, in the three axes of the translation coordinate system, the first extension member and / or the second extension member move away from the reference member in two directions along two of the axes, and move away from the reference member in a single direction along the remaining axis, to form an extended shape of the building unit. Referring to FIG14, as an example of this embodiment 1, along any two axes of the third axis Z, the second axis Y, or the first axis X, the extension component moves away from the reference member 1 in two directions along the aforementioned two axes, and the extension component moves away from the reference member 1 in a single direction along the remaining axis, to form an extended shape of the building unit 100. Referring to FIG14, a plurality of first extension members 2 and a plurality of second extension members 3 perform a linear movement or a rotational movement around the third axis Z in two directions, and perform a linear movement or a rotational movement around the second axis Y in two directions, and perform a linear movement or a rotational movement around the second axis Y in one direction along the first axis X, thereby forming an extension body 300 with a cuboid structure in the outer contour. In this way, the number of spatial cells in the building unit 100 is expanded from one spatial cell in the contracted form to eighteen spatial cells in the expanded form, achieving an expansion ratio of eighteen times.

[0153] It should be noted that the first expansion member 2 and the second expansion member 3 listed in the above examples are only used to explain the direction in which the building unit 100 can be expanded. The first expansion member 2 and the second expansion member 3 are not limited to the layout shown in Figure 1.

[0154] Based on the aforementioned building unit 100, this embodiment 1 also provides a device for expanding and shrinking space, which includes the building unit 100 of the aforementioned embodiment 1.

[0155] Based on the building unit 100 described above, this embodiment 1 also provides a building with expandable space, which includes the building unit 100 of the aforementioned embodiment 1.

[0156] Example 2

[0157] The difference between this embodiment 2 and embodiment 1 is that, referring to Figure 15, in this embodiment 2, the reference member 1 does not form the outer wall of the frame 200 and the extension 300. Specifically, the building unit 100 includes the reference member 1 and the extension assembly, wherein the reference member 1 has a base plane 1a that can remain stationary; the extension assembly can move relative to the reference member 1 to move closer to and further away from the reference member 1.

[0158] The expansion component includes multiple first expansion members 2 and multiple second expansion members 3. The multiple first expansion members 2 can approach the reference member 1 to enclose the reference member 1 and form a frame body 200 with a hexahedral structure in the outer contour. The multiple second expansion members 3 can approach the first expansion members 2 to connect to the outside of the frame body 200 and form a contracted shape of the building unit 100.

[0159] It should be noted that in this embodiment 2, the building unit 100, in its contracted form, has a frame 200 enclosed by multiple first extension members 2. The reference member 1 serves as the reference for the deformation of the building unit 100. When the building unit 100 is in its contracted form, it is enclosed within the frame 200 by the multiple first extension members 2. In this embodiment 2, the reference member 1 does not form the outer wall of the frame 200 within the building unit 100.

[0160] A translation coordinate system is formed by the third axis Z, the second axis Y (orthogonal to the third axis Z), and the first axis X. The second extension 3 and the first extension 2 are configured to move in the translation coordinate system formed by the first axis X, the second axis Y, and the third axis Z as follows:

[0161] The first extension member 2 and the second extension member 3 move linearly along the third axis Z, the second axis Y, and the first axis X, or rotate around the third axis Z, the second axis Y, and the first axis X, so that the first extension member 2 and the second extension member 3 move away from the reference member 1 in two directions along the third axis Z, the second axis Y, and the first axis X, respectively, and enclose an extension body 300 with an internal space larger than the internal space of the frame body 200, forming an extended form of the building unit 100; the outer contour of the extension body 300 has a hexahedral structure, and the first extension member 2 and the second extension member 3 constitute the outer wall of the extension body 300; and, in the same axis, the number of times the same first extension member 2 and the same second extension member 3 perform linear or rotational movement is one.

[0162] It should be noted that in this embodiment 2, the building unit 100, in its extended form, the extended body 300, is formed by a plurality of first extended members 2 and a plurality of second extended members 3, and the reference member 1 is enclosed within the extended body 300. Within the building unit 100 of this embodiment 2, the reference member 1 does not form the outer wall of the extended body 300.

[0163] Referring to Figure 15, in this embodiment 2, when the building unit 100 switches from a contracted state to an expanded state, multiple first expansion members 2 and multiple second expansion members 3 perform a linear movement or a rotational movement around the third axis Z in two directions, and perform a linear movement or a rotational movement around the second axis Y in two directions, and perform a linear movement or a rotational movement around the second axis Y in two directions, thereby forming an expanded body 300 with a cubical outer contour. In this way, the number of spatial cells in the building unit 100 of this embodiment 2 expands from one spatial cell in the contracted state to twenty-seven spatial cells in the expanded state, achieving a twenty-seven-fold expansion ratio.

[0164] It should be noted that the building unit 100 of this embodiment involves expansion deformation in three axes, and in each axis, it involves expansion deformation in two directions. Generally speaking, in order to facilitate the first expansion member 2 and the second expansion member 3 to extend and deform downward toward the reference member 1, the reference member 1 can be arranged off the ground. For example, referring to Figure 16, the building unit 100 can adopt a treehouse structure arrangement, and the reference member 1 can be off the ground by means of connecting rods or load-bearing parts 10 or other connecting structures, so that the space for the first expansion member 2 and the second expansion member 3 to extend and deform is reserved below the reference member 1.

[0165] Based on the aforementioned building unit 100, this embodiment 2 also provides an expandable space device, which includes the building unit 100 of the aforementioned embodiment 2.

[0166] Based on the building unit 100 described above, this embodiment 2 also provides a building with expandable space, which includes the building unit 100 of the aforementioned embodiment 2.

[0167] Example 3

[0168] Based on the building unit 100 of Embodiment 1, Embodiment 3 provides a motorhome as an example of the equipment. Taking an example with an expansion ratio of 12x, the motorhome (not shown in the figure) includes a chassis (not shown in the figure) on which the building unit 100 is located.

[0169] Referring to Figures 17-27, the building unit 100 of this embodiment 3 includes a bottom plate assembly 5, a side plate assembly 6, and a top plate assembly 7. The bottom plate assembly 5 forms the bottom of the extension body 300, the side plate assembly 6 forms the peripheral outer wall of the extension body 300, and the top plate assembly 7 forms the top of the extension body 300.

[0170] The translation coordinate system of this embodiment 3 includes a third axis Z, a second axis Y, and a first axis X that are orthogonal to each other. The third axis Z indicates the length axis of the extension body 300 and has two directions: front and back. The second axis Y indicates the width axis of the extension body 300 and has two directions: left and right. The first axis X indicates the height axis of the extension body 300 and has two directions: up and down.

[0171] Referring to Figures 21-22, the base plate assembly 5 is the load-bearing structure of the building unit 100, and it includes a first base plate member 5a, a second base plate member 5b, a third base plate member 5c, a fourth base plate member 5d, a fifth base plate member 5e, and a sixth base plate member 5f, wherein,

[0172] The first base plate 5a is a planar plate structure and serves as a reference member 1, acting as a spatial expansion reference for the building unit 100. It maintains its shape and position when the building unit 100 switches from a retracted state to an expanded state. Therefore, heavier external components such as the power assembly 12 can be connected to the first base plate 5a, ensuring that these heavy external components remain stationary when the building unit 100 switches between its retracted and expanded states.

[0173] The second base plate 5b is a planar plate structure and is located to the left of the first base plate 5a. Furthermore, the second base plate 5b is a second extension member 3, which is rotatably connected to the first base plate 5a, allowing the second base plate 5b to rotate relative to the first base plate 5a around a third axis Z. This enables the second base plate 5b to unfold or retract relative to the first base plate 5a, completing either contraction or expansion deformation.

[0174] The third base plate 5c is a planar plate structure and is located to the right of the first base plate 5a. Furthermore, the third base plate 5c is also the second extension member 3, rotatably connected to the first base plate 5a, allowing the third base plate 5c to rotate relative to the first base plate 5a around the third axis Z. This enables the third base plate 5c to unfold or retract relative to the first base plate 5a, completing shrinkage or expansion deformation.

[0175] The fourth base plate 5d is a planar plate structure and is located in front of the first base plate 5a. Furthermore, the fourth base plate 5d is the first extension member 2, which includes a fourth front plate portion 50d, a fourth middle plate portion 51d, and a fourth rear plate portion 52d, wherein...

[0176] The rear end of the fourth front plate 50d is rotatably connected to the first bottom plate 5a, so that the fourth front plate 50d can rotate relative to the first bottom plate 5a around the second axis Y. When the building unit 100 is in the retracted state, the fourth front plate 50d flips and folds towards the first bottom plate 5a, so that the fourth front plate 50d rotates to the upright state.

[0177] The fourth middle plate portion 51d is arranged at the front end of the fourth front plate portion 50d, and the rear end of the fourth middle plate portion 51d is rotatably connected to the front end of the first front plate portion, so that the fourth middle plate portion 51d can rotate relative to the fourth front plate portion 50d about the second axis Y. Furthermore, when the building unit 100 is in the retracted state, the fourth middle plate portion 51d flips and folds towards the fourth front plate portion 50d, so that the fourth middle plate portion 51d rotates to an upright state and fits against the fourth front plate portion 50d.

[0178] The fourth rear plate portion 52d is arranged at the front end of the fourth middle plate portion 51d, and the rear end of the fourth rear plate portion 52d is rotatably connected to the front end of the fourth middle plate portion 51d, so that the fourth rear plate portion 52d can rotate relative to the fourth middle plate portion 51d about the second axis Y. When the building unit 100 is in the retracted state, the fourth rear plate portion 52d moves toward the fourth front plate portion 50d, so that the fourth rear plate portion 52d approaches the fourth middle plate portion 51d, and the fourth middle plate portion 51d and the fourth front plate portion 50d are folded and erected.

[0179] The fifth base plate 5e is a planar plate structure and is located to the left of the fourth base plate 5d. When the building unit 100 is in a contracted state, the fifth base plate 5e is folded into the inside of the second base plate 5b. Therefore, the fifth base plate 5e is the first extension member 2, which is rotatably connected to the fourth base plate 5d, so that the fifth base plate 5e can rotate relative to the fourth base plate 5d around the third axis Z, thereby allowing the fifth base plate 5e to move closer to or away from the fourth base plate 5d, completing the contraction deformation or expansion deformation.

[0180] The sixth base plate 5f is a planar plate structure and is located to the right of the fourth base plate 5d. When the building unit 100 is in a contracted state, the sixth base plate 5f is folded into the inside of the third base plate 5c. Therefore, the sixth base plate 5f is also the first extension member 2, which is rotatably connected to the fourth base plate 5d, so that the sixth base plate 5f can rotate relative to the fourth base plate 5d around the third axis Z, thereby allowing the sixth base plate 5f to move closer to or further away from the fourth base plate 5d to complete the contraction deformation or expansion deformation.

[0181] Referring to Figures 17 and 26, the side panel assembly 6 is the exterior wall structure of the building unit 100, which includes a first upper left side panel 6a, a first lower left side panel 6b, a second upper left side panel 6c, a second lower left side panel 6d, a first upper right side panel 6e, a first lower right side panel 6f, a second upper right side panel 6g, and a second lower right side panel 6h.

[0182] Referring to Figure 27, the outer contours of the first upper left side panel 6a and the first lower left side panel 6b are L-shaped. Taking the first upper left side panel 6a as an example, the first upper left side panel 6a includes a first left side panel portion 60a and a first rear side panel portion 61a that are connected to each other. When the building unit 100 is in a retracted state, the first left side panel portion 60a is arranged on the left side of the first bottom plate member 5a, and the first rear side panel portion 61a is arranged on the rear side of the first bottom plate member 5a.

[0183] Both the first upper left side panel 6a and the first lower left side panel 6b are second extension members 3. The first upper left side panel 6a is fitted onto the first lower left side panel 6b, allowing the first upper left side panel 6a to rise and fall relative to the first lower left side panel 6b. When the building unit 100 is in a retracted state, the first upper left side panel 6a is fitted onto the first lower left side panel 6b, causing the first lower left side panel 6b to retract into the interior of the first upper left side panel 6a, thereby enabling the exterior wall structure of the building unit 100 to complete the shrinkage deformation in the height direction.

[0184] It is understandable that the lifting connection between the first upper left side plate 6a and the first lower left side plate 6b can be achieved in various ways. The two can achieve lifting movements through linear transmission components such as cylinders, hydraulic cylinders, and guide rails. For example, as an example of this embodiment, the first lower left side plate 6b can be provided with a receiving cavity, and a lifting cylinder is provided within the receiving cavity. The first upper left side plate 6a is sleeved on the outside of the first lower left side plate 6b and connected to the piston rod of the lifting cylinder. Thus, when the lifting cylinder actuates and causes the piston rod to rise, the first upper left side plate 6a will rise relative to the first lower left side plate 6b; conversely, when the lifting cylinder actuates and causes the piston rod to descend, the first upper left side plate 6a will descend relative to the first lower left side plate 6b. This allows the first upper left side plate 6a to undergo contraction or expansion deformation relative to the first lower left side plate 6b in the height direction.

[0185] The second upper left side plate 6c and the second lower left side plate 6d are flat plate structures and are arranged inside the first upper left side plate 6a and outside the base plate assembly 5. Therefore, the second upper left side plate 6c and the second lower left side plate 6d are both second extension members 3. Furthermore, the second upper left side plate 6c and the second lower left side plate 6d can move linearly along the third axis Z relative to the first upper left side plate 6a and the first lower left side plate 6b, so that the second upper left side plate 6c and the second lower left side plate 6d can move along the third axis Z towards the front end of the first base plate member 5a or towards the rear end of the first base plate member 5a, thereby enabling the exterior wall structure of the building unit 100 to complete the expansion deformation or contraction deformation in the length direction. Moreover, the second upper left side plate 6c is sleeved on the second lower left side plate 6d, so that the second upper left side plate 6c can rise and fall relative to the second lower left side plate 6d, thereby enabling the second upper left side plate 6c and the second lower left side plate 6d to complete the contraction deformation or expansion deformation in the height direction. The mechanism for the lifting action of the second upper left side plate 6c and the second lower left side plate 6d can be the same as the mechanism for the first upper left side plate 6a and the first lower left side plate 6b, which will not be described in detail here.

[0186] The outer contours of the first upper right side plate 6e and the first lower right side plate 6f are also L-shaped. Furthermore, at the rear end of the first bottom plate 5a, the first upper right side plate 6e is located in front of the first upper left side plate 6a, so that when the building unit 100 is in the retracted state, the first upper right side plate 6e cooperates with the first bottom plate 5a. Therefore, the first upper right side plate 6e is the first extension member 2 in the building unit 100.

[0187] Furthermore, the first upper right side plate 6e is fitted onto the first lower right side plate 6f, allowing the first upper right side plate 6e to rise and fall relative to the first lower right side plate 6f. When the building unit 100 is in a retracted state, the first upper right side plate 6e is fitted onto the first lower right side plate 6f, causing the first lower right side plate 6f to retract into the interior of the first upper right side plate 6e, thereby enabling the exterior wall structure of the building unit 100 to complete the shrinkage deformation in the height direction. Moreover, in this way, the first lower right side plate 6f serves as the second extension member 3 within the building unit 100.

[0188] Similar to the second upper left side panel 6c and the second lower left side panel 6d, the second upper right side panel 6g and the second lower right side panel 6h are both flat plate structures. The second upper right side panel 6g and the second lower right side panel 6h are arranged inside the first upper right side panel 6e and outside the base plate assembly 5, so the second upper right side panel 6g and the second lower right side panel 6h are both second extension members 3.

[0189] Furthermore, both the second upper right side plate 6g and the second lower right side plate 6h can move linearly along the third axis Z relative to the first upper right side plate 6e and the first lower right side plate 6f, allowing the second upper right side plate 6g and the second lower right side plate 6h to move towards the front end of the first base plate member 5a or towards the rear end of the first base plate member 5a along the third axis Z. This enables the exterior wall structure of the building unit 100 to complete expansion or contraction deformation in the length direction. Moreover, the second upper right side plate 6g is fitted onto the second lower right side plate 6h, allowing the second upper right side plate 6g to rise and fall relative to the second lower right side plate 6h, thus enabling the second upper right side plate 6g and the second lower right side plate 6h to complete contraction or expansion deformation in the height direction.

[0190] The cooperation structure for the lifting action of the first upper right side plate 6e and the first lower right side plate 6f, and the second upper right side plate 6g and the second lower right side plate 6h can adopt the cooperation structure of the first upper left side plate 6a and the first lower left side plate 6b, which will not be described in detail here.

[0191] Referring to Figures 23-25, the top plate assembly 7 is the top structure of the building unit 100, which includes a first top plate member 7a, a second top plate member 7b, a third top plate member 7c, a fourth top plate member 7d, a fifth top plate member 7e, and a sixth top plate member 7f, wherein,

[0192] The first top plate member 7a is the first extension member 2. Specifically, the outer contour of the first top plate member 7a is L-shaped, and it includes a first top plate portion 70a and a first end plate portion 71a connected to each other. When the building unit 100 is in a retracted state, the first top plate portion 70a is located above the first bottom plate member 5a, and the first end plate portion 71a is located at the rear end of the side plate assembly 6. A lifting mechanism can be provided between the first bottom plate member 5a and the first top plate portion 70a. The lifting mechanism can raise and lower the first top plate portion 70a relative to the first bottom plate member 5a, so that the first top plate member 7a and the first bottom plate member 5a can complete the contraction deformation or expansion deformation in the height direction.

[0193] The second top plate member 7b is the second extension member 3, which is a flat plate structure and is arranged above the first top plate portion 70a. Furthermore, the second top plate member 7b can move linearly relative to the first top plate portion 70a along the third axis Z, so that the second top plate member 7b can move away from the first top plate portion 70a or move closer to the first end plate portion 71a along the third axis Z, thereby enabling the top structure of this building unit 100 to complete the expansion deformation or contraction deformation in the length direction.

[0194] Both the third top plate member 7c and the fourth top plate member 7d are second extension members 3. Specifically, both are flat plate structures. The third top plate member 7c is rotatably connected to the left side of the first top plate portion 70a, and the fourth top plate member 7d is rotatably connected to the right side of the first top plate portion 70a. This allows both the third top plate member 7c and the fourth top plate member 7d to rotate relative to the first top plate portion 70a around the third axis Z. This enables the third top plate member 7c and the fourth top plate member 7d to expand or retract relative to the first top plate portion 70a, thereby allowing the top structure of this building unit 100 to undergo contraction or expansion deformation in the width direction.

[0195] The fifth top plate 7e and the sixth top plate 7f are also the second extension members 3. Specifically, they are flat plate structures. The fifth top plate 7e is rotatably connected to the left side of the second top plate 7b, and the sixth top plate 7f is rotatably connected to the right side of the second top plate 7b. When the building unit 100 is in the retracted state, the fifth top plate 7e is outside the third top plate 7c, and the sixth top plate 7f is outside the fourth top plate 7d.

[0196] Both the fifth top plate 7e and the sixth top plate 7f can rotate relative to the second top plate 7b around the third axis Z. In this way, the third top plate 7c and the fourth top plate 7d can expand or retract relative to the second top plate 7b, thereby enabling the top structure of the building unit 100 to complete the shrinkage or expansion deformation in the width direction.

[0197] It is understandable that the base plate assembly 5, the side plate assembly 6, and the top plate assembly 7 can all move in the opposite direction along their own stretching deformation path to complete the shrinking deformation.

[0198] Referring to Figures 17-27, when the building unit 100 of this embodiment 3 is in the retracted state, the bottom plate assembly 5, the side plate assembly 6, and the top plate assembly 7 all move towards the first bottom plate member 5a, i.e., the location of the reference member 1.

[0199] The retracted state of the base plate assembly 5 is as follows: the second base plate 5b and the third base plate 5c both rotate toward the first base plate 5a to an upright position, causing the second base plate 5b and the third base plate 5c to retract relative to the first base plate 5a; the fifth base plate 5e and the sixth base plate 5f both rotate toward the fourth base plate 5d to an upright position, causing the fifth base plate 5e and the sixth base plate 5f to retract relative to the fourth base plate 5d; and the fourth front plate portion 50d and the fourth middle plate portion 51d rotate toward the first base plate 5a to an upright position, causing the fourth base plate 5d to retract relative to the first base plate 5a. In this way, the fifth base plate 5e is close to the left side of the first base plate 5a, the sixth base plate 5f is close to the right side of the first base plate 5a, the fourth front plate portion 50d is close to the front side of the first base plate 5a, the second base plate 5b is to the left of the fifth base plate 5e, and the third base plate 5c is to the right of the sixth base plate 5f.

[0200] The retracted state of the side panel assembly 6 is as follows: the second upper left side panel 6c is fitted onto the second lower left side panel 6d, such that the second lower left side panel 6d is folded into the interior of the second upper left side panel 6c, and the second upper left side panel 6c is folded into the left side of the second bottom plate 5b; the first upper left side panel 6a is fitted onto the first lower left side panel 6b, such that the first lower left side panel 6b is folded into the interior of the first upper left side panel 6a, and the first upper left side panel 6a is folded into the second upper left side panel 5b. The left side of plate 6c; the second upper right side plate 6g is fitted onto the second lower right side plate 6h, such that the second lower right side plate 6h is folded into the interior of the second upper right side plate 6g, and the second upper right side plate 6g is folded into the right side of the second bottom plate 5b; the first upper right side plate 6e is fitted onto the first lower right side plate 6f, such that the first lower right side plate 6f is folded into the interior of the first upper right side plate 6e, and the first upper right side plate 6e is folded into the right side of the second upper right side plate 6g.

[0201] The retracted state of the top plate assembly 7 is as follows: the first top plate member 7a descends relative to the first bottom plate member 5a along the first axis X, bringing the first top plate member 7a closer to the first bottom plate member 5a; the second top plate member 7b moves linearly relative to the first top plate portion 70a along the third axis Z, bringing the second top plate member 7b closer to the first end plate portion 71a along the third axis Z; the third top plate member 7c rotates relative to the first top plate portion 70a around the third axis Z, thereby retracting relative to the first top plate portion 70a to the left side of the first upper left side plate 6a; the fourth top plate member 7d rotates relative to the first top plate portion 70a around the third axis Z, thereby retracting relative to the first top plate portion 70a to the right side of the first upper right side plate 6e; the fifth top plate member 7e rotates relative to the second top plate portion around the third axis Z, thereby retracting relative to the second top plate portion to the left side of the third top plate member 7c; and the sixth top plate member 7f rotates relative to the second top plate portion around the third axis Z, thereby retracting relative to the second top plate portion to the right side of the fourth top plate member 7d.

[0202] Based on the switching of the retracted state by the base plate assembly 5, side plate assembly 6, and top plate assembly 7, the first base plate 5a, the fourth base plate 5d, the first top plate 7a, the fifth base plate 5e, the sixth base plate 5f, and the first upper right side plate 6e cooperate to form the frame 200 of the building unit 100. The frame 200 has a hexahedral structure, and the projection of the frame 200 on each reference plane of the moving coordinate system is square. The second base plate 5b, the third base plate 5c, the fourth base plate 5d, the first upper left side plate 6a, the first lower left side plate 6b, the second upper left side plate 6c, the second lower left side plate 6d, the first lower right side plate 6f, the second upper right side plate 6g, the second lower right side plate 6h, the second top plate 7b, the third top plate 7c, the fourth top plate 7d, the fifth top plate 7e, and the sixth top plate 7f serve as the second extension members 3, which are close to the outside of the frame 200.

[0203] Referring to Figures 17-27, when the building unit 100 of this embodiment 3 is in the extended form, the bottom plate assembly 5, the side plate assembly 6, and the top plate assembly 7 are all far away from the first bottom plate member 5a.

[0204] The extended form of the base plate assembly 5 is as follows: the second base plate member 5b and the third base plate member 5c rotate relative to the first base plate member 5a to a horizontal state, so that the second base plate member 5b and the third base plate member 5c unfold relative to the first base plate member 5a; and the fourth base plate member 5d, the fifth base plate member 5e and the sixth base plate member 5f move linearly relative to the first base plate member 5a along the first axis, so that the fourth base plate member 5d, the fifth base plate member 5e and the sixth base plate member 5f move away from the first base plate member 5a. Moreover, the fourth base plate member 5d and the fifth base plate member 5e rotate relative to the fourth base plate member 5d to a horizontal state, so that the second base plate member 5b and the third base plate member 5c unfold relative to the fourth base plate member 5d. Furthermore, the fourth front plate portion 50d rotates relative to the first base plate member 5a, so that the fourth front plate portion 50d unfolds along the third axis Z. The fourth middle plate portion 51d rotates relative to the fourth front plate portion 50d, so that the fourth middle plate portion 51d unfolds along the third axis Z.

[0205] The extended configuration of the side panel assembly 6 is as follows: the first upper left side panel 6a rises relative to the first lower left side panel 6b along the first axial direction X, causing the first upper left side panel 6a to be raised relative to the first lower left side panel 6b. Similarly, the second upper left side panel 6c rises relative to the second lower left side panel 6d along the first axial direction X, the first upper right side panel 6e rises relative to the first lower right side panel 6f along the first axial direction X, and the second upper right side panel 6g rises relative to the second lower right side panel 6h along the first axial direction X, thereby completing the extended deformation of the side panel assembly 6 along the first axial direction X; and the second upper left side panel 6a... c. The second lower left side plate 6d moves linearly along the third axis Z relative to the first upper left side plate 6a and the first lower left side plate 6b, respectively, thereby moving the second upper left side plate 6c and the second lower left side plate 6d away from the first upper left side plate 6a and the first lower left side plate 6b, respectively. Similarly, the second upper right side plate 6g and the second lower right side plate 6h move linearly along the third axis Z relative to the first upper right side plate 6e and the first lower right side plate 6f, respectively, thereby moving the second upper right side plate 6g and the second lower right side plate 6h to positions relative to the first upper right side plate 6e and the first lower right side plate 6f, respectively. On the front side, this allows the side panel assembly 6 to complete its expansion deformation along the third axis Z; and the first upper left side panel 6a and the first lower left side panel 6b move linearly relative to the first base plate member 5a along the second axis Y, causing the first upper left side panel 6a and the first lower left side panel 6b to move to the left side of the first base plate member 5a along the second axis Y; moreover, the second upper left side panel 6c and the second lower left side panel 6d move linearly relative to the fourth base plate member 5d along the second axis Y, causing the second upper left side panel 6c and the second lower left side panel 6d to move to the left side of the fourth base plate member 5d. Furthermore, the first upper right side plate 6e and the first lower right side plate 6f move linearly relative to the first base plate member 5a along the second axis Y, so that the first upper right side plate 6e and the first lower right side plate 6f move to the right side of the first base plate member 5a along the second axis Y. Moreover, the second upper right side plate 6g and the second lower right side plate 6h move linearly relative to the fourth base plate member 5d along the second axis Y, so that the second upper right side plate 6g and the second lower right side plate 6h move to the right side of the fourth base plate member 5d along the second axis Y, thereby enabling the side plate assembly 6 to complete the expansion deformation in the second axis Y.

[0206] The extended state of the top plate assembly 7 is as follows: the first top plate member 7a rises relative to the first bottom plate member 5a along the first axis X, thereby raising the first top plate member 7a; and the second top plate member 7b, the fifth top plate member 7e, and the sixth top plate member 7f move linearly relative to the first top plate portion 70a along the third axis Z, thereby moving the second top plate member 7b, the fifth top plate member 7e, and the sixth top plate member 7f to the front side of the first top plate member 7a in the third axis Z; and the third top plate member 7c rotates relative to the first top plate portion 70a about the third axis Z. The third top plate member 7c is unfolded to the left side of the first top plate portion 70a, and the fourth top plate member 7d is rotated relative to the first top plate portion 70a about the third axis Z, so that the fourth plate member is unfolded to the right side of the first top plate portion 70a; and the fifth top plate member 7e is rotated relative to the second top plate member 7b about the third axis Z, so that the fifth top plate member 7e is unfolded to the left side of the second top plate member 7b, and the sixth top plate member 7f is rotated relative to the second top plate member 7b about the third axis Z, so that the sixth plate member is unfolded to the right side of the second top plate member 7b.

[0207] Based on the switching of the aforementioned extended states by the base plate assembly 5, side plate assembly 6, and top plate assembly 7, the first base plate component 5a, the second base plate component 5b, the third base plate component 5c, the fourth base plate component 5d, the fifth base plate component 5e, the sixth base plate component 5f, the first upper left side plate 6a, the first lower left side plate 6b, the second upper left side plate 6c, the second lower left side plate 6d, the first upper right side plate 6e, the first lower right side plate 6f, the second upper right side plate 6g, the second lower right side plate 6h, the first top plate component 7a, the second top plate component 7b, the third top plate component 7c, the fourth top plate component 7d, the fifth top plate component 7e, and the sixth top plate component 7f cooperate with each other to form the extended body 300 of this building unit 100. The extended body 300 has a hexahedral structure, and the projection of the frame body 200 on each reference plane of the moving coordinate system is square. Furthermore, the first base plate 5a, the second base plate 5b, the third base plate 5c, the fourth base plate 5d, the fifth base plate 5e, the sixth base plate 5f, the first upper left side plate 6a, the first lower left side plate 6b, the second upper left side plate 6c, the second lower left side plate 6d, the first upper right side plate 6e, the first lower right side plate 6f, the second upper right side plate 6g, the second lower right side plate 6h, the first top plate 7a, the second top plate 7b, the third top plate 7c, the fourth top plate 7d, the fifth top plate 7e, and the sixth top plate 7f together constitute the outer wall of the extended body 300.

[0208] Furthermore, it can be seen from the contracted and extended forms of the base plate assembly 5, side plate assembly 6, and top plate assembly 7 that during the switching between the contracted and extended forms of the RV in this embodiment 3, the first base plate member 5a to the sixth base plate member 5f, the first top plate member 7a to the sixth top plate member 7f, and the first upper left side plate 6a to the second lower right side plate 6h will have multiple deformation steps. In these deformation steps, the first base plate member 5a to the sixth base plate member 5f, the first top plate member 7a to the sixth top plate member 7f, and the first upper left side plate 6a to the second lower right side plate 6h will still satisfy the following:

[0209] The first extension 2 and / or the second extension 3 currently moving move in the same axis, and the same first extension 2 and the same second extension 3 move linearly along the same axis, and / or the same first extension 2 and the same second extension 3 rotate around the same axis once.

[0210] It should be noted that the hexahedral structure formed by the frame 200 and the extension 300 does not need to be a regular hexahedron. Depending on the configuration required for the RV, the floor assembly 5, side panel assembly 6, and roof assembly 7 can have different specifications. For example, the third roof panel 7c and the fourth roof panel 7d can extend to the outside of the side panel assembly 6, thus forming an eaves structure. Of course, depending on the functional configuration required for the RV, in addition to the floor assembly 5, side panel assembly 6, and roof assembly 7, structures such as a balcony assembly 11 and a partition assembly can also be added. These added structures are loaded onto the outside of the frame 200 as the second extension 3.

[0211] It should be noted that when the base plate assembly 5, top plate assembly 7, and side plate assembly 6 switch between the retracted and extended states, the sequence in which the various internal structural components perform linear or rotational movements can be adjusted according to the power mechanisms configured between or within the base plate assembly 5, top plate assembly 7, and side plate assembly 6. For example, the second top plate component 7b, the fifth top plate component 7e, and the sixth top plate component 7f can first move linearly along the third axis Z to the front of the first top plate component 7a along the third axis Z, and then the fifth top plate component 7e and the sixth top plate component 7f can perform rotational movements. Alternatively, the fifth top plate component 7e and the sixth top plate component 7f can first perform rotational movements, and then move linearly along the third axis Z together with the second top plate component 7b to the front of the first top plate component 7a along the third axis Z. Of course, in this sequence, the third top plate component 7c and the fourth top plate component 7d need to flip and unfold before the fifth top plate component 7e and the sixth top plate component 7f, or flip and unfold synchronously with the fifth top plate component 7e and the sixth top plate component 7f.

[0212] It is understandable that when the base plate assembly 5, top plate assembly 7, and side plate assembly 6 switch between a retracted and an extended state, taking the top plate assembly 7 as an example, the second top plate member 7b, the fifth top plate member 7e, and the sixth top plate member 7f can move linearly along the first axis X simultaneously, so that the first extension member 2 and the second extension member 3, which move linearly in the same axis and in the same direction, move synchronously; and the fifth top plate member 7e and the sixth top plate member 7f can rotate synchronously, so that the two second extension members 3, which rotate around the same axis, move synchronously. Moreover, taking the side plate assembly 6 as an example, the first upper left side plate 6a and the first upper right side plate 6e can move linearly relative to the first base plate member 5a synchronously along the second axis Y, so that the two second extension members 3, which move linearly in the same axis and in opposite directions, move synchronously. Of course, different connection relationships can be configured between the base plate assembly 5, the top plate assembly 7, and the side plate assembly 6, which can also enable the two first extension members 2 or the two second extension members 3 to move synchronously in the same axial direction and in the same direction, or the two first extension members 2 or the first extension member 2 and the second extension member 3 to move synchronously around the same axial direction and rotate, or the two first extension members 2 or the first extension member 2 and the second extension member 3 to move synchronously in the same axial direction and in opposite directions. These will not be described in detail here.

[0213] It should be noted that the base plate assembly 5, the top plate assembly 7, and the side plate assembly 6 can be driven by mechanical structures such as cylinder assemblies, hydraulic cylinder assemblies, or rotating shaft assemblies, so that each plate can complete the extension deformation or contraction deformation along its own movement path.

[0214] In summary, the building unit 100 provided in this embodiment of the invention controls each first extension member 2 and each second extension member 3 to perform a linear movement along the same axis and / or a rotational movement around the same axis, thereby enabling the building unit 100 to deform the expandable space. This effectively reduces the difficulty and cost of achieving synchronous movement of the same first extension member 2 or the same second extension member 3. In this way, the building unit 100 can achieve expansion or contraction deformation of space with simple and effective deformation actions and processes. This ensures that the accumulated error value remains within a suitable range during the switching between contraction and expansion states, thus ensuring that the building unit 100 can repeatedly and stably complete the deformation of the expandable space. Furthermore, the space deformation action is simple and reliable, making it suitable for widespread use in the civilian field. Simultaneously, the building unit 100 can ensure improved control accuracy of the synchronous movement of the first extension member 2 and the second extension member 3, thereby greatly reducing the difficulty and cost of deforming the expandable space, further improving the stability and reliability of the expandable space, and ensuring the safety of the expandable space.

[0215] Furthermore, the building unit 100 provided in this embodiment of the invention controls the first extension member 2 and / or the second extension member 3, which are currently moving, to move along the same axis. In this way, during the spatial deformation of the building unit 100, the multi-dimensional movement required to achieve the three-dimensional deformation and opening / closing is decomposed into multiple one-dimensional movement movements. The linear or rotational movements performed by the first extension member 2 and the second extension member 3 are all one-dimensional movements and will not generate a two-dimensional motion focus inside the building unit 100. This effectively avoids the problem of the motion focus hindering the expansion or contraction of the building unit 100, enabling the building unit 100 to achieve the ability to deform and open / close in three-dimensional space, and greatly expanding the spatial expansion ratio that the building unit 100 can achieve.

[0216] Furthermore, the building unit 100 provided in this embodiment of the invention uses the frame 200 as the form reference for the contracted form, and the frame 200 and the extension 300 have relatively arranged walls in each axis of the translation coordinate system, and the walls in the three axes enclose each other, so that the building unit 100 has a relatively regular shape structure. In this way, the building unit 100 can easily and effectively switch to the extended form based on the one-dimensional motion of the first extension 2 and the second extension 3, thereby providing a safe, effective, simple and reliable three-dimensional space expansion method for buildings with expandable space. Moreover, the relatively regular shape structure of the building unit 100 allows the reference component 1, the first extension 2 and the second extension 3 to be configured and produced with a standardized structure. This not only makes the building unit 100 suitable for large-scale standardized production, but also reduces the production cost of buildings with expandable space, making the building unit 100 suitable for promotion and application in the civil field.

[0217] Furthermore, the building unit 100 provided in this embodiment of the invention, which forms a frame 200 by cooperating with a plurality of first extension members 2 and a reference member, or a frame 200 formed by cooperating with a plurality of first extension members 2, can have an internal space that is not interfered with during the switching between the contracted form and the extended form. In this way, the building unit 100 can utilize the internal space of the frame 200 to pre-configure the furniture and necessities required for the user's life, thereby making the building unit 100 more suitable for the user's living and more suitable for civilian promotion.

[0218] Furthermore, the building unit 100 provided in this embodiment of the invention controls each first expansion member 2 and each second expansion member 3 to perform a linear or rotational movement along the same axis once, limiting the number of times each first expansion member 2 and each second expansion member 3 moves linearly along each axis or rotates around each axis. In this way, when the building unit 100 performs expansion deformation at several times the expansion ratio, the first expansion member 2 and the second expansion member 3 can expand and deform in an orderly manner, enabling the building unit 100 to complete multiple expansion deformations with a simple and effective deformation path. Moreover, by controlling each first expansion member 2 and / or each second expansion member 3 to move synchronously along the same axis, the building unit 100 can effectively save the steps of shrinkage deformation or expansion deformation when switching between shrinkage and expansion modes, thereby saving the steps of deformation control of the building unit 100, further reducing the deformation difficulty and deformation cost of the expandable space, and improving the stability and reliability of the expandable space.

[0219] The building structures and equipment provided in the embodiments of the present invention both include the aforementioned building structure unit 100, and also possess the beneficial effects of the aforementioned building structure unit 100.

[0220] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A building unit with expandable and retractable space, characterized in that, The building unit has a switchable contracted and expanded form, and the building unit includes: A reference component, which has a base plane that can remain stationary; Multiple first extension members are movably connected to each other or to the reference member, enabling them to move closer to and further away from the reference member; Multiple second extension members are movably connected to each other and are also movably connected to the first extension member, allowing them to move closer to and away from the first extension member; or, they are also movably connected to the reference member, allowing them to move closer to and away from the reference member. The first and second extension members are configured to move in a translation coordinate system consisting of three axes, wherein the first axis of the translation coordinate system is perpendicular to the base plane, and the second and third axes of the translation coordinate system are two axes orthogonal to the first axis; the movement of the first and second extension members is as follows: The first extension performs linear movement along at least one axis and / or rotational movement about at least one axis, so that the first extension moves closer to the reference member and cooperates with the reference member to form a frame, wherein the frame has opposing walls in each axis of the translation coordinate system, the reference member and the first extension member constitute the walls of the frame, and the walls in the three axes enclose each other. The second extension performs linear movement along at least one axis, and / or rotational movement about at least one axis, so that the second extension moves closer to the outside of the frame, at which point the building unit is in the contracted state; The first and second extension members move linearly along at least one axis and / or rotate about at least one axis, moving away from the reference member to form an extension body with the reference member. The first, second, and reference members together constitute the outer wall of the extension body, at which point the building unit is in the extended form. During the process of the building unit switching between the contracted form and the expanded form, the first expansion member and / or the second expansion member currently moving moves along the same axis, and the same first expansion member and the same second expansion member move linearly along the same axis, and / or the same first expansion member and the same second expansion member rotate around the same axis once.

2. The building unit according to claim 1, characterized in that, The first expansion member and the second expansion member are further configured to: Along the same axis and in the same direction, at least two of the first extensions currently performing linear movement move synchronously, or... Along the same axis and in the same direction, at least two of the second extensions currently performing linear movement move synchronously, or... Along the same axis and in the same direction, the first extension and the second extension, which are currently performing linear movement, move synchronously. Alternatively, the first expansion member and the second expansion member may also be configured as follows: Along the same axis in opposite directions, at least two of the first extensions currently performing linear movement move synchronously, or... Along the same axis in opposite directions, at least two of the second extensions currently performing linear movement move synchronously, or... Along the same axis in opposite directions, the first extension and the second extension, which are currently performing linear movement, move synchronously. Alternatively, the first expansion member and the second expansion member may also be configured as follows: At least two of the first extensions currently performing rotational movement move synchronously in the same direction around the same axis, or... In the same direction around the same axis, at least two of the second extensions currently performing rotational movement move synchronously, or... The first extension and the second extension, which are currently rotating around the same axis, move synchronously in the same direction. Alternatively, the first expansion member and the second expansion member may also be configured as follows: In opposite directions around the same axis, at least two of the first extensions currently performing rotational movement move synchronously, or... In opposite directions around the same axis, at least two of the second extensions currently performing rotational movement move synchronously, or... The first extension and the second extension, which are currently rotating around the same axis, move synchronously in opposite directions.

3. The building unit according to claim 1, characterized in that, The extended body has opposing walls in each axis of the moving coordinate system, and the walls in the three axes enclose each other. At least one of the first extension members, and / or at least one of the second extension members includes a first panel portion and a second panel portion that intersect each other, the first panel portion and the second panel portion being located on different sides of the extension body, and capable of synchronously performing linear or rotational movement.

4. The building unit according to claim 1, characterized in that, The first extension component is housed or partially housed within the base component.

5. The building unit according to claim 1, characterized in that, The frame has a base space, and during the process of the building unit switching between the contracted form and the extended form, the first extension member and the second extension member remain outside the base space; Alternatively, the frame has a base space, and during the switching between the contracted and extended forms of the building unit, the first extension member and the second extension member remain outside the base space, which is limited by the structural boundary of the reference member.

6. The building unit according to claim 1, characterized in that, The building unit has one space cell in the contracted form and multiple space cells in the expanded form; and the multiple of the number of space cells in the expanded form relative to the number of space cells in the contracted form is the space expansion ratio of the building unit. Each of the space grids is divided by the boundaries of the first extension member, the second extension member, and the reference member, or by the intersections between them.

7. The building unit according to claim 6, characterized in that, The first extension member and the second extension member perform only one linear or rotational movement in the same axis, so that the number of spatial cells that the building unit expands in the same axis from the reference member is two or three. In the extended body, in a single direction along any axis of the moving coordinate system, the reference member is connected to the side of the first extended member or the second extended member; or, in two directions along any axis of the moving coordinate system, the reference member is connected to at least one of the first extended member and the second extended member, such that the reference member is located between any two of the first extended member or the second extended member. Furthermore, depending on the number of axes in which the plurality of first extension members and the plurality of second extension members perform linear or rotational movements, the building unit forms extensions with different expansion ratios.

8. The building unit according to claim 1, characterized in that, The first extension member is a single flat plate structure, or the first extension member is a bent structure consisting of multiple connected planar structures.

9. The building unit according to claim 1, characterized in that, In the extended body, the reference member is connected to either the first extended member or the second extended member in a single direction along any axis of the moving coordinate system; or, In the extended body, the reference member is connected to at least one of the first extended member and the second extended member in two directions of any axis of the moving coordinate system.

10. The building unit according to claim 9, characterized in that, The first extension member and / or the second extension member move away from the reference member in a single direction along any axis of the moving coordinate system to form an extended form of the building unit.

11. The building unit according to claim 9, characterized in that, The first extension member and / or the second extension member move away from the reference member in two directions along any one axis of the moving coordinate system to form an extended form of the building unit.

12. The building unit according to claim 9, characterized in that, In any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in a single direction along the aforementioned two axes to form an extended form of the building unit.

13. The building unit according to claim 9, characterized in that, In any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in two directions along one of the axes and in a single direction along the other axis to form an extended form of the building unit.

14. The building unit according to claim 9, characterized in that, In any two axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in two directions along one of the axes and away from the reference member in two directions along the other axis to form an extended form of the building unit.

15. The building unit according to claim 9, characterized in that, In the three axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in a single direction along each of the three axes to form an extended shape of the building unit.

16. The building unit according to claim 9, characterized in that, In the three axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in a single direction along two of the axes, and move away from the reference member in two directions along the remaining axis, to form the extended shape of the building unit.

17. The building unit according to claim 9, characterized in that, In the three axes of the moving coordinate system, the first extension member and / or the second extension member move away from the reference member in two directions along two of the axes, and move away from the reference member in a single direction along the remaining axis, to form the extended shape of the building unit.

18. A building unit with expandable and retractable space, characterized in that, The building unit has a switchable contracted and expanded form, and the building unit includes: A reference component, which has a base plane that can remain stationary; Multiple first extension members are movably connected to each other, and at least one first extension member is movably connected to the reference member, enabling it to approach and move away from the reference member; Multiple second extension members are movably connected to each other and are also movably connected to the first extension member, allowing them to move closer to and further away from the first extension member; The first and second extension members are configured to move in a translation coordinate system consisting of three axes, wherein the first axis of the translation coordinate system is perpendicular to the base plane, and the second and third axes of the translation coordinate system are two axes orthogonal to the first axis; the movement of the first and second extension members is as follows: The first extension performs linear movement along at least one axis and / or rotational movement about at least one axis, so that the first extension moves closer to and surrounds the reference member, thereby forming a frame, wherein the frame has opposing walls in each axis of the translation coordinate system and the walls in the three axes surround each other. The second extension performs linear movement along at least one axis, and / or rotational movement about at least one axis, so that the second extension moves closer to the outside of the frame, at which point the building unit is in the contracted state; The first and second extension members perform linear movement along at least one axial direction and / or rotational movement about at least one axial direction, causing them to move away from the reference member in two directions along the three axes, thereby enclosing and forming an extension body. The first and second extension members constitute the outer wall of the extension body, at which point the building unit is in the extended form. During the process of the building unit switching between the contracted form and the expanded form, the first expansion member and / or the second expansion member currently moving moves along the same axis, and the same first expansion member and the same second expansion member move linearly along the same axis, and / or the same first expansion member and the same second expansion member rotate around the same axis once.

19. A building structure with expandable and retractable space, characterized in that, Includes the building unit as described in any one of claims 1-17.

20. A building structure with expandable and retractable space, characterized in that, It includes a load-bearing block and the building unit as described in claim 18, wherein the load-bearing block is connected to the reference member.

21. A device with expandable and retractable space, characterized in that, Includes the building unit as described in any one of claims 1-18.

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