Retractable structure assembly

Abstract

The invention discloses a structure assembly capable of being wound, and relates to the field of flexible winding structures, the structure assembly capable of being wound comprises a pod core plate, the pod core plate is composed of a plurality of structure units, and each structure unit comprises two elastic single bodies which are symmetrically arranged; the elastic single body comprises an elastic thin plate body and pod segments separated from the two ends of the elastic thin plate body. One ends of the corresponding pod segments of the elastic monomers which are oppositely arranged are attached to each other; and the pod core plate can be flattened and overlapped in a pressed state. The panel-shaped structure support can be formed by only needing a single layer or two layers of elastic single bodies, and the panel-shaped structure support has the characteristics that the panel-shaped structure support is lighter, the winding rigidity is easier to adjust, the winding is easier and the like.

Description

Technical Field

[0001] The present invention relates to the field of flexible retractable structures, and particularly to a retractable structure assembly. Background Art

[0002] Expandable structures are widely used in daily life, flexible electronic products, and the aerospace field. In flexible electronic products, with the development of flexible screens, the development trend of flexible electronic products is increasingly towards multifunctional electronic terminal devices with larger screens, lighter weight, and easier portability. The scroll screen is a development direction that major electronic manufacturers are more concerned about. In the aerospace field, due to the influence of the volume and launch weight of the rocket fairing, expandable structures are developing towards high-performance structures with higher deployment-to-retraction ratios, higher precision, higher strength, and lighter weight.

[0003] Currently, expandable structures have support structures of types such as folding, telescopic, inflatable, truss cable net, and winding. The winding support structure cross-section can be folded and wound on a drum for storage, and has advantages such as extremely high deployment-to-retraction ratios, light weight, and high stiffness. It has extensive applications in lightweight structures in the aerospace field such as solar panels, thin-film antennas, and solar sails. The winding structure framework mainly has support rods in shapes such as pod-shaped, C-shaped, herringbone-shaped, N-shaped, and M-shaped. Compared with other shaped rods, because the pod rod cross-section is closed, it has higher bending resistance and torsional stiffness, and has received extensive attention.

[0004] Based on the characteristics of the pod rod, the prior art discloses a flexible layer support structure and a tooth-patterned thin-wall structure. The panel-like structure is composed of two thin plates clamping multiple semi-pod rods or a pod rod elastic sandwich layer. Although this panel-like structure can be flattened and laminated and wound on a drum, because the structure cross-section has at least four thin-wall panels, when the structure is laminated and bent, it is easy to have interlayer misalignment and inconsistent deformation between the four thin-wall panels. Moreover, the more layers the structure has, the more complex the stress on each layer is, and the structure is prone to damage or interlayer delamination. Although the interlayer misalignment and shear lag phenomenon can be reduced by meshing teeth, when the total thickness after the structure is laminated is the same, the more layers there are, the smaller the single-layer thickness, and the finer the teeth on the layer surface, and the corresponding higher the processing precision requirements. The joints between the layers are generally bonded by adhesives, and the bonding strength of the layers has very high requirements for the bonding process. Moreover, the more layers there are, the larger the bonding area, and under the action of bending and shear forces, the probability of interlayer delamination is higher. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a retractable structure assembly, which only requires a single layer or two elastic monomers to form a panel-like structure support, and has characteristics such as lighter weight, easier adjustment of winding stiffness, and easier winding.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: In a first aspect, an embodiment of the present invention provides a retractable structure assembly, including a pod core board, the pod core board is composed of a plurality of structural units, and each structural unit includes two symmetrically arranged elastic monomers; the elastic monomer includes an elastic thin plate body and pod segments separated from both ends of the elastic thin plate body; Between the relatively arranged elastic monomers, one end of the corresponding pod segments is attached to each other; the pod core board can be flattened and overlapped under a compressed state.

[0007] In a second aspect, an embodiment of the present invention provides a retractable structure assembly, including a pod core board, the pod core board is composed of a plurality of structural units, and each structural unit includes an upper elastic thin plate body, a lower elastic thin plate body separated from the same layer of elastic thin plate, and upper pod segments and lower pod segments connected to both ends of the upper elastic thin plate body and the lower elastic thin plate body; Under a compressed state, the upper elastic thin plate body, the lower elastic thin plate body, the upper pod segments and the lower pod segments can be overlapped in the same plane.

[0008] As a further implementation manner, the structural units are arranged in alignment in the transverse and longitudinal directions; Alternatively, the structural units are arranged in a staggered manner along the y-axis or x-axis or z-axis direction.

[0009] As a further implementation manner, the root of the finger of the pod segment is tangent to the elastic thin plate body, and the tip of the finger of the pod segment is in surface contact with the tip of the finger of the other symmetric pod segment.

[0010] As a further implementation manner, after overlapping, there is a separation seam between the side surface of the pod segment and the elastic thin plate body, and there is a docking seam between the two oppositely arranged pod segments.

[0011] As a further implementation manner, the separation seam is connected to a crack arrest hole at the root of the finger of the pod segment.

[0012] As a further implementation manner, the tips of the upper pod segment and the lower pod segment at the same end are connected as a whole; After overlapping, there is a docking seam between the relatively arranged tips of the fingers.

[0013] As a further implementation manner, after overlapping, there is a separation seam between the side surface of the upper pod segment and the upper elastic thin plate body, and there is a separation seam between the side surface of the lower pod segment and the lower elastic thin plate body; A crack arrest hole is provided at the tip of the separation seam.

[0014] As a further implementation manner, both ends of the pod core board are respectively connected to semi-sectioned pod rods.

[0015] As a further implementation, a sealing plate is arranged on the outer surface of the pod core board.

[0016] The beneficial effects of the above embodiments of the present invention are as follows: (1) Only one or two layers of the structural units of the present invention are required to form a panel-like structure support. Compared with the existing panel-like rollable thin-walled structure, the pod segments separated from each layer are used as elastic support structures, which have the characteristics of being lighter in weight, easier to adjust the winding stiffness, and easier to wind. Moreover, the panel-like structure is a double-layer structure or a single-layer structure, and the bonding area between layers or the number of bonding points is significantly reduced, and the probability of debonding will decrease, reducing the requirements for the bonding process. The pod core board formed by the present invention can be used as a support framework for flexible devices such as flexible electronic terminals, flexible solar cells, thin-film antennas, and solar sails, and has the advantages of being light in weight, high in storage ratio, large in deployment area, simple in winding, and not easily damaged.

[0017] (2) The pod core board of the present invention is composed of multiple structural units, and each structural unit includes two symmetrically arranged elastic monomers. The elastic monomer includes an elastic thin plate body and pod segments separated from both ends of the elastic thin plate body. Since one end of the pod segment is connected to the elastic thin plate body and the other end is in surface contact with another symmetrically arranged pod segment, it can ensure deformation when pressed, and the pod segment and the elastic thin plate body form a coplanar structure; it can quickly restore its shape when the pressure is removed; the pod segments in multiple structural units are evenly distributed, improving the mechanical properties of the pod core board.

[0018] (3) The structural unit of the present invention can separate the elastic thin plate body and the pod segments from the same layer of elastic thin plate, which can ensure the connection between the elastic thin plate body and the pod segments. When laminated, the elastic thin plate body and the pod segments can be in the same plane, forming a thinner flexible structure.

[0019] (4) The structural unit of the present invention has various distribution forms, such as aligned arrangement and staggered arrangement, and can be applied to different occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specification drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0021] Figure 1 It is a schematic diagram of the structural unit of Embodiment 1 of the present invention; Figure 2 It is a schematic diagram of the lamination and shape recovery of the structural unit of Embodiment 1 of the present invention; Figure 3Schematic diagram of the pod core board formed by aligning the structural units of Embodiment 1 of the present invention; Figure 4 Schematic diagram of the superposed state of the pod core board formed by aligning the structural units of Embodiment 1 of the present invention; Figure 5 Schematic diagram of the layout of the pod core board, semi-sectioned pod rod, and sealing plate in Embodiment 1 of the present invention; Figure 6 Schematic diagram of the tooth pattern structure arranged on the contact surface of the pod core board in Embodiment 1 of the present invention; Figure 7 Schematic diagram of the y-direction dislocation arrangement of the structural units in Embodiment 2 of the present invention; Figure 8 Schematic diagram of the pod core board with the y-direction dislocation arrangement of the structural units in Embodiment 2 of the present invention; Figure 9 Schematic diagram of the x-direction dislocation arrangement of the structural units in Embodiment 3 of the present invention; Figure 10 Schematic diagram of the pod core board with the x-direction dislocation arrangement of the structural units in Embodiment 3 of the present invention; Figure 11 Schematic diagram of the z-direction dislocation arrangement of the structural units in Embodiment 4 of the present invention; Figure 12 Schematic diagram of the superposition and shape recovery of the structural units in Embodiment 5 of the present invention; Figure 13 Schematic diagrams of the unfolded form and superposed form after the symmetrical connection of the double structural units in Embodiment 5 of the present invention; Figure 14 Schematic diagram of the unfolded pod core board in Embodiment 5 of the present invention.

[0022] Among them, 31 - pod core board; 311 - elastic thin plate body; 3111 - matrix; 3112 - skeleton layer; 312 - semi-sectioned pod rod; 313 - pod segment; 3131 - fingertip part; 3132 - finger root part; 3133 - docking seam; 3134 - crack arrest hole; 3135 - partition seam; 314 - sealing plate. Detailed implementation manners

[0023] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0024] For the convenience of description, in the present invention, if terms such as "upper", "lower", "left", and "right" appear, they only indicate the same directions as the upper, lower, left, and right of the attached drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0025] Embodiment 1: In the existing flexible structure, the cross-section has at least four thin-walled panels. When the structure is laminated and bent, it is easy to have interlayer misalignment and inconsistent deformation coordination between the four thin-walled panels. Moreover, the more layers the structure has, the more complex the forces on each layer are, and the structure is prone to damage or interlayer debonding. Although the interlayer misalignment and shear lag phenomenon can be reduced by meshing teeth, the processing requirements are very high.

[0026] Based on this, the present embodiment provides a retractable structure assembly, as Figure 3 shown, including a pod core board 31. The pod core board 31 is composed of a plurality of structural units arranged in alignment in the transverse and longitudinal directions. Each structural unit includes two symmetrically arranged elastic monomers, and the joint surface of the two elastic monomers is a laminated surface. After the pod core board 31 is laminated, it forms a plate-like structure as Figure 4 shown.

[0027] Specifically, as Figure 1 shown, the elastic monomer includes an elastic thin plate body 311 and a pod segment 313. The pod segment 313 can be separated or cut out from the elastic thin plate body 311. In this embodiment, the elastic thin plate body 311 is a rectangular structure, which is provided with a rectangular groove. Each end of the rectangular groove is connected to a pod segment 313, and the two pod segments 313 are laminated to be adapted to the rectangular groove.

[0028] One end of the pod segment 313 connected to the elastic thin plate body 311 is the finger root 3132, and the other end is the finger tip 3131; the connecting part between the finger root 3132 and the finger tip 3131 is two arc structures with opposite bending directions connected together. The finger root 3132 is tangent to the elastic thin plate body 311, and the tangent position corresponds to the inner wall of the rectangular groove, and can achieve flexible deformation when being pressed flat by force; the finger tip 3131 is in surface contact with the finger tip 3131 of the other pod segment 313 symmetrical to it with respect to the laminated surface.

[0029] As Figure 2As shown, during the superposition process of two elastic monomers, the fingertip parts 3131 of two adjacent pod segments 313 arranged oppositely and separated from the same elastic thin plate body 311 move towards each other to form a docking seam 3133; after the external force is removed, it can quickly return to its original state by relying on elasticity. There are separation seams 3135 between both sides of the pod segment 313 and the elastic thin plate body 311. The separation seam 3135 extends to the finger root 3132 where there is a crack arrest hole 3134. The separation seam 3135 and the crack arrest hole 3134 can effectively release local stress during the process of being pressed flat by force, avoiding fatigue fracture of the material.

[0030] As Figure 5 shown, both ends of the pod core plate 31 are respectively connected to the semi-sectioned pod rods 312. The semi-sectioned pod rods 312 are composed of two symmetrically arranged pod rod segments. One end of the pod rod segment is connected to the pod core plate 31, and the other end is attached to another pod rod segment, that is, a surface contact is formed; a closed structure is formed at the end of the pod core plate 31 through the semi-sectioned pod rods 312, which can inhibit shear deformation and facilitate subsequent unfolding and folding.

[0031] Furthermore, sealing plates 314 are arranged on the upper and lower surfaces of the pod core plate 31. The sealing plates 314 are attached to the surface of the pod core plate 31 and have appropriate dimensions; the sealing plates 314 and the pod core plate 31 form a sandwich structure, which can reduce stress concentration of the core plate.

[0032] Furthermore, as Figure 6 shown, on each layer of contact surface (the contact surfaces between the sealing plate 314 and the elastic thin plate body 311, between the pod segments 313, and between the pod segment 313 and the elastic thin plate body 311), an interlocking tooth pattern structure is arranged to increase the interlayer shear resistance of each layer of superposed contact surface. The cross-section of the tooth of the tooth pattern structure can be trapezoidal, arc-shaped and other tooth shapes.

[0033] The structural unit of this embodiment only needs two layers to form a panel-like structure support. Compared with the existing panel-like rollable thin-walled structure, in this embodiment, the pod segments 313 separated from each layer are used as elastic support structures, which have the characteristics of being lighter in weight, easier to adjust the winding stiffness, and easier to wind; at the same time, the bonding area or the number of bonding points between the double-layer structural units of this embodiment is greatly reduced, so the probability of debonding will decrease, and the requirements for the bonding process can be reduced.

[0034] The rollable structure assembly of this embodiment can be used as a support skeleton for flexible devices such as flexible electronic terminals, flexible solar cells, thin-film antennas, and solar sails, and has the advantages of being light in weight, high in storage ratio, large in unfolded area, simple in winding, and not easy to be damaged.

[0035] Embodiment 2: This embodiment provides a rollable structure assembly, which is different from that of Embodiment 1 in the arrangement mode of the structural unit. As Figure 7and Figure 8 As shown, the structural units are arranged in a staggered manner along the y-axis direction (the extending direction of the separation seam 3135).

[0036] The other structures are the same as those in Embodiment 1 and will not be described herein again.

[0037] Embodiment 3: This embodiment provides a retractable structural component, which is different from Embodiment 1 in the arrangement manner of the structural units. As Figure 9 and Figure 10 shown, the structural units are arranged in a staggered manner along the x-axis direction (perpendicular to the extending direction of the separation seam 3135).

[0038] The other structures are the same as those in Embodiment 1 and will not be described herein again.

[0039] Embodiment 4: This embodiment provides a retractable structural component, which is different from Embodiment 1 in the arrangement manner of the structural units. As Figure 11 shown, the structural units are stacked along the z-axis direction (height direction) to form a multi-layer structure, and the specific number of layers is determined according to actual requirements.

[0040] The other structures are the same as those in Embodiment 1 and will not be described herein again.

[0041] Embodiment 5: This embodiment provides a retractable structural component, which is different from Embodiment 1 in the structural forms of the pod segment 313 and the elastic thin plate body 311. Specifically, as Figures 12 - 14 shown, both the pod segment 313 and the elastic thin plate body 311 are separated or cut from the same layer of elastic thin plate. In the view direction, the elastic thin plate body 311 forms an upper elastic thin plate body and a lower elastic thin plate body, and the pod segment 313 forms an upper pod segment and a lower pod segment.

[0042] Among them, the finger root 3132 of the upper pod segment is connected to the upper elastic thin plate body, the finger root 3132 of the lower pod segment is connected to the lower elastic thin plate body, and the finger tips 3131 of the upper pod segment and the lower pod segment at the same end are connected as a whole.

[0043] After superposition, the upper elastic thin plate body, the lower elastic thin plate body, the upper pod segment and the lower pod segment are in the same plane, forming a thinner flexible structure; there is a separation seam 3135 between the side surface of the upper pod segment and the upper elastic thin plate body, and there is a separation seam 3135 between the side surface of the lower pod segment and the lower elastic thin plate body. At the same time, there is also a separation seam 3135 between the side surfaces of the upper pod segment and the lower pod segment. Crack arrest holes 3134 are provided at the tips of the separation seams 3135. There is a docking seam 3133 between the fingertip parts 3131 of the relatively arranged pod segments 313.

[0044] The structural unit of this embodiment is a single-layer structure, which is lighter in mass and easier to wind compared with the existing multi-layer thin-wall layer that can be wound.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A retractable structural component, characterized in that, It includes a pod core board, which is composed of multiple structural units, and each structural unit includes two symmetrically arranged elastic monomers; the elastic monomer includes an elastic thin plate body and pod segments separated from both ends of the elastic thin plate body. Between the relatively arranged elastic monomers, the corresponding ends of the pod segments are in contact with each other; the pod core board can be flattened and stacked under a compressed state.

2. A retractable structural component, characterized in that, It includes a pod core board, which is composed of multiple structural units, and each structural unit includes an upper elastic thin plate body, a lower elastic thin plate body separated from the same layer of elastic thin plate, and upper pod segments and lower pod segments connected to both ends of the upper elastic thin plate body and the lower elastic thin plate body. Under a compressed state, the upper elastic thin plate body, the lower elastic thin plate body, the upper pod segments and the lower pod segments can be stacked in the same plane.

3. The retractable structural component according to claim 1 or 2, characterized in that The structural units are arranged in alignment in the transverse and longitudinal directions. Alternatively, the structural units are arranged in a staggered manner along the y-axis or x-axis or z-axis direction.

4. A retractable structural component according to claim 1, characterized in that, The root of the finger of the pod segment is tangent to the elastic thin plate body, and the tip of the finger of the pod segment is in surface contact with the tip of the finger of the other symmetric pod segment.

5. The retractable structural component according to claim 1 or 4, characterized in that After stacking, there is a separation seam between the side surface of the pod segment and the elastic thin plate body, and there is a docking seam between two oppositely arranged pod segments.

6. The retractable structural component according to claim 5, characterized in that, The separation seam is connected to a crack arrest hole at the root of the finger of the pod segment.

7. The retractable structural component according to claim 2, characterized in that, The tips of the upper pod segment and the lower pod segment at the same end are connected as a whole. After stacking, there is a docking seam between the relatively arranged tips of the fingers.

8. A retractable structural component according to claim 2 or 7, characterized in that After stacking, there is a separation seam between the side surface of the upper pod segment and the upper elastic thin plate body, and there is a separation seam between the side surface of the lower pod segment and the lower elastic thin plate body. A crack arrest hole is provided at the tip of the separation seam.

9. The retractable structural component according to claim 1 or 2, characterized in that Both ends of the pod core board are respectively connected to semi-sectioned pod rods.

10. The retractable structural component according to claim 9, characterized in that, A sealing plate is arranged on the outer surface of the pod core board.

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