Flexible support device with focusing function

Abstract

The utility model relates to the technical field of flexible supports, and in particular to a flexible support device with a focusing function, comprising: a flexible support and at least three drive seats; the flexible support comprises a flexible side wall and a cylindrical portion for installing the main mirror chamber of a space camera, the upper surface of the cylindrical portion is lower than the upper surface of the flexible side wall to form a circular step, and a central hole for the space camera correction mirror to pass through is also provided at the central portion of the bottom surface of the cylindrical portion; at least three flexible components are also evenly distributed on the upper surface of the circular step, and the flexible components extend along the axial direction of the flexible support; the drive seat is made of a shape memory polymer, and the drive seat drives the flexible support to move after deformation, thereby realizing automatic focusing of the space camera. The advantage of the utility model is that the imaging quality of the space camera is ensured by the flexible deformation ability of the flexible component. At the same time, the drive seat made of the shape memory polymer realizes automatic focusing of the space camera.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible supports, in particular to a flexible support device with a focusing function. Background Art

[0002] The flexible backplane is a vital component in space cameras. It is crucial to improving the performance of cameras in complex environments, mainly reflected in its lightweight characteristics, temperature adaptability characteristics, and flexible support characteristics. During the launch of space payloads (cameras), in order to reduce costs, the backplane must be effectively lightweight while ensuring the mechanical stability of the structure. At the same time, for temperature adaptability, the optomechanical structure design of space cameras needs to consider the impact of temperature changes on the surface shape of optical lenses, including local stress caused by differences in thermal expansion coefficients of different materials, thereby reducing the impact on imaging quality. The existing flexible backplane does not have a small-stroke focusing function. If focusing is required, a separate focusing device needs to be set up, making the entire structure complex and costly. Utility Model Content

[0003] In view of this, the utility model aims to create a flexible supporting device with focusing function. The flexible deformation ability of the flexible component can effectively reduce the adverse effects of temperature changes on the surface accuracy of the optical lens, thereby ensuring the imaging quality of the space camera, and at the same time realize the focusing of the space camera through the drive seat.

[0004] In order to achieve the above-mentioned purpose, the technical solution created by the utility model is implemented as follows:

[0005] A flexible support device with a focusing function comprises: a flexible support and at least three drive seats; the flexible support comprises a flexible side wall and a cylindrical portion for installing a main mirror chamber of a space camera, the upper surface of the cylindrical portion is lower than the upper surface of the flexible side wall to form a circular step, and a central hole for allowing a corrective mirror of the space camera to pass through is also provided at the central portion of the bottom surface of the cylindrical portion; at least three flexible components are also evenly distributed on the upper surface of the circular step, and the flexible components extend along the axial direction of the flexible support; a gap is left between the flexible component and the flexible side wall; the drive seat is made of a shape memory polymer, and after the drive seat is deformed, it drives the flexible support to move, thereby realizing automatic focusing of the space camera.

[0006] Furthermore, the flexible component includes a connecting plate, a connecting ear and a first flexible hinge, and the two ends of the first flexible hinge are respectively connected to the connecting plate and the connecting ear; the connecting plate is connected to the upper surface of the circular step, and the connecting ear is connected to the main mirror chamber, and the connecting ear is also provided with a flexible groove passing through; the connecting plate and the connecting ear are both arc-shaped and are adapted to the arc surface of the cylindrical part.

[0007] Furthermore, a first flexible ring groove, a second flexible ring groove and a third flexible ring groove are provided on the flexible side wall at positions corresponding to the projections of the flexible components. The first flexible ring groove and the second flexible ring groove are symmetrically arranged to form a second flexible hinge, and the third flexible ring groove is located above the first flexible ring groove and the second flexible ring groove.

[0008] Furthermore, the first flexible hinge and the second flexible hinge are both double-arc flexible hinges.

[0009] Furthermore, the driving seat includes a first connecting plate, a second connecting plate and an arc plate, the two ends of the arc plate are respectively connected to the first connecting plate and the second connecting plate, the first connecting plate is perpendicular to the second connecting plate, the first connecting plate is connected to the flexible side wall and is located below the second flexible hinge; the arc plate is made of shape memory polymer.

[0010] Furthermore, an arc groove group is provided on the side of the flexible support opposite to the circular step.

[0011] Furthermore, the outer contour of the flexible support is a polygon.

[0012] Furthermore, the outer contour of the flexible support is a hexagon.

[0013] Compared with the prior art, the invention can achieve the following beneficial effects:

[0014] 1) Through the flexible deformation ability of flexible components, the adverse effects of temperature changes on the surface accuracy of optical lenses can be effectively reduced, thereby ensuring the imaging quality of space cameras.

[0015] 2) Automatic focusing of the space camera is achieved through a drive seat made of shape memory polymer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a cross-sectional view of the assembly of the flexible support and the space camera provided in the embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of a flexible support device with focusing function provided according to an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of a flexible support provided according to an embodiment of the utility model;

[0020] Figure 4It is a projection view of one side of the flexible support provided by the embodiment of the utility model with an arc groove group;

[0021] Figure 5 is a cross-sectional view of a flexible support provided according to an embodiment of the utility model;

[0022] Figure 6 is a side view of a flexible support provided according to an embodiment of the utility model;

[0023] Figure 7 It is a structural schematic diagram of a driving seat provided according to an embodiment of the utility model.

[0024] The reference numerals include: 1. flexible support; 11. flexible side wall; 12. cylindrical portion; 13. circular step; 131. a flexible link; 132. a second flexible annular groove; 133. a third flexible annular groove; 134. a second flexible hinge; 14. a center hole; 15. a flexible member; 151. a connecting plate; 152. a connecting ear; 153. a first flexible hinge; 154. a flexible groove; 155. an opening groove; 16. an arc groove group; 2. a driving seat; 21. a first connecting plate; 22. a second connecting plate; 23. an arc plate; 3. a main mirror; 4. a main mirror chamber; 5. a corrective mirror group; 6. a corrective mirror chamber. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model creation more clear, the utility model creation is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model creation and do not constitute a limitation of the utility model creation.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] In the description of the invention of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention of the utility model 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 understood as a limitation on the invention of the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the invention of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of the utility model can be understood according to specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] like Figure 1 , Figure 2 As shown, an embodiment of the utility model provides a flexible support device with a focusing function, comprising: a flexible support 1 and at least three driving seats 2, wherein the outer contour of the flexible support 1 is a polygon.

[0031] In this embodiment, the outer contour of the flexible support 1 is a hexagon, and three driving seats are evenly arranged on the outer contour of the flexible support 1. The driving seat 3 is made of a shape memory polymer, and the driving seat 2 drives the flexible support 1 to move after deformation, so as to realize automatic focusing of the space-adjustable camera.

[0032] like Figure 3-Figure 6As shown, the flexible support 1 includes a flexible side wall 11 and a cylindrical portion 12 for installing the main mirror chamber of the space camera. The upper surface of the cylindrical portion 12 is lower than the upper surface of the flexible side wall 11 to form a circular step 13. A central hole 14 for the space camera correction mirror to pass through is also provided at the center of the bottom surface of the cylindrical portion; at least three flexible members 15 are evenly distributed on the upper surface of the circular step, and the flexible members 15 extend along the axial direction of the flexible support 1; a gap is left between the flexible members 15 and the flexible side wall 11. An arc groove group 16 is also provided on the side of the flexible support 1 opposite to the circular step 13, and the arc groove group 16 is used to reduce weight, thereby achieving lightweighting of the flexible support 1.

[0033] In this embodiment, the weight reduction of the flexible support 1 is 74%. The primary mirror chamber 4 is supported by the flexible member 15 in a three-point support manner. This layout makes the load borne by each flexible member 15 relatively balanced, avoiding the situation where a single point is subjected to excessive force or uneven force, thereby improving the overall stability and reliability.

[0034] In other embodiments, the number of flexible members 15 is a multiple of three.

[0035] The space camera includes a main mirror 3, a main mirror chamber 4, a correction lens group 5 and a correction lens chamber 6. The main mirror chamber 4 is arranged in the cylindrical portion 12 and connected to the flexible member 15. The correction lens group 5 is arranged in the correction lens chamber 6 through the central hole 14. The correction lens chamber 6 is connected to the flexible support 1. When the space camera faces temperature changes, such temperature changes will affect the surface shape of the optical lens, thereby affecting the imaging quality. Through the flexible deformation ability of the flexible member 15, the adverse effect of temperature changes on the surface accuracy of the optical lens is effectively reduced, thereby ensuring the imaging quality of the space camera.

[0036] Furthermore, the flexible member 15 includes a connecting plate 151, a connecting ear 152 and a first flexible hinge 153, and two ends of the first flexible hinge 153 are respectively connected to the connecting plate 151 and the connecting ear 153; two opening grooves 155 are formed between the connecting plate 151, the connecting ear 153 and the first flexible hinge 153.

[0037] The connecting plate 151 is connected to the upper surface of the circular step 14, and the connecting ear 152 is connected to the main mirror chamber 4. The connecting ear 152 is also provided with a penetrating flexible groove 154;

[0038] The connecting plate 151 and the connecting ear 153 are both arc-shaped and match the arc surface of the cylindrical portion 12. The connecting plate 151 is welded to the circular step 14 or is integrally formed with the circular step 14. In this embodiment, the first flexible hinge 153 is a double arc flexible hinge.

[0039] Therefore, by connecting the two ends of the first flexible hinge 153 to the connecting plate 151 and the connecting ear 152 respectively, the flexible component 15 is ensured to be sufficiently rigid while also having flexibility and adaptability.

[0040] Furthermore, a first flexible ring groove 131, a second flexible ring groove 132 and a third flexible ring groove 133 are provided on the flexible side wall 13 at positions corresponding to the projections of the flexible component 15. The first flexible ring groove 131 and the second flexible ring groove 132 are symmetrically arranged to form a second flexible hinge 134, and the third flexible ring groove 133 is located above the first flexible ring groove 131 and the second flexible ring groove 132.

[0041] In this embodiment, the second flexible hinge 134 is a double arc flexible hinge, and the positions of the first flexible ring groove 131, the second flexible ring groove 132 and the third flexible ring groove 133 are respectively located at the positions where the two opening grooves 155 and the flexible groove 154 are projected on the flexible side wall 13, and the size of the first flexible ring groove 131 and the second flexible ring groove 132 is equal to that of the opening groove 155; the size of the flexible groove 154 is equal to that of the third flexible ring groove 133.

[0042] Therefore, by such an arrangement, the forming can be realized in one step by wire cutting, thus saving the processing cost.

[0043] Furthermore, the drive seat 2 includes a first connecting plate 21, a second connecting plate 22 and an arc plate 23, the two ends of the arc plate 23 are connected to the first connecting plate 21 and the second connecting plate 22 respectively, the first connecting plate 21 is perpendicular to the second connecting plate 22, and the arc plate 23 is made of shape memory polymer; the first connecting plate 21 is connected to the mounting block 16 on the flexible side wall 13, and is located below the second flexible hinge 134. The second connecting plate 22 is connected to the working part matching the space camera (this part is not described in this article). The drive seat 2 also includes a heating device, which uses an external heating film to heat the arc plate 23. When the heating device is powered on and the arc plate 23 is heated by the external heating film, the arc plate 23 gradually expands from an arc to a plate, thereby driving the flexible support 1 to move, and realizing the focusing of the space camera. The displacement distance of the arc plate 23 is not limited in this article, and is set according to the focusing distance actually required.

[0044] In this embodiment, the shape memory polymer is made of epoxy resin shape memory polymer powder or granular material, which is heated to 100-110° C. under thermal, photoinduced or electroinduced conditions, and the epoxy resin curing agent CM is heated to 100-110° C. to melt it, and the heated epoxy resin shape memory polymer powder or granular material is mixed with the melted epoxy resin curing agent CM, and stirred at 75-85° C. for 18-22 minutes using a magnetic stirrer to mix them evenly, and cured at 75-85° C. for 1.2-1.8 hours, and then heated to 145-155° C. and then heated to 145-155° C. Curing is performed for 1.5 to 2.1 hours. During the curing process, a mold is used to form the epoxy resin shape memory polymer and the epoxy resin shape memory polymer is cooled to room temperature. The shape memory is uniformly input into the vibration bag covered with carbon fiber by the vacuum curing method, and a thin layer of steel sheet (0.2 mm) is laid on the fiber surface. The obtained epoxy resin shape memory polymer composite material reaches the glass transition temperature of more than 100°C again under the action of heat (a heating film is pasted on the surface). An external force is applied to deform it, and the external force is maintained. Then, it is cooled to room temperature. After the external force is removed, the deformation is maintained for a long time. The room temperature mentioned in this article is 20 to 25°C.

[0045] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0046] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A flexible support device with focusing function, characterized in that: include: A flexible support and at least three drive seats; The flexible support comprises a flexible side wall and a cylindrical portion for installing a primary mirror chamber of a space camera, the upper surface of the cylindrical portion is lower than the upper surface of the flexible side wall to form a circular step, and a central hole for allowing a corrective mirror of the space camera to pass through is also provided at the center of the bottom surface of the cylindrical portion; at least three flexible members are evenly distributed on the upper surface of the circular step, and the flexible members extend along the axial direction of the flexible support; a gap is left between the flexible member and the flexible side wall; The driving seat is made of shape memory polymer, and after the driving seat is deformed, it drives the flexible support to move, thereby realizing automatic focusing of the space camera.

2. The flexible support device with focusing function according to claim 1, characterized in that: The flexible component includes a connecting plate, a connecting ear and a first flexible hinge, and the two ends of the first flexible hinge are respectively connected to the connecting plate and the connecting ear; the connecting plate is connected to the upper surface of the circular step, and the connecting ear is connected to the main mirror chamber, and the connecting ear is also provided with a flexible groove passing through; the connecting plate and the connecting ear are both arc-shaped and are adapted to the arc surface of the cylindrical portion.

3. The flexible support device with focusing function according to claim 2, characterized in that: A first flexible ring groove, a second flexible ring groove and a third flexible ring groove are also provided on the flexible side wall at positions corresponding to the projections of the flexible component; the first flexible ring groove and the second flexible ring groove are symmetrically arranged to form a second flexible hinge, and the third flexible ring groove is located above the first flexible ring groove and the second flexible ring groove.

4. The flexible support device with focusing function according to claim 3, characterized in that: The first flexible hinge and the second flexible hinge are both double-arc flexible hinges.

5. The flexible support device with focusing function according to claim 3, characterized in that: The driving seat includes a first connecting plate, a second connecting plate and an arc plate; the two ends of the arc plate are respectively connected to the first connecting plate and the second connecting plate, the first connecting plate is perpendicular to the second connecting plate, the first connecting plate is connected to the flexible side wall and is located below the second flexible hinge; the arc plate is made of shape memory polymer.

6. The flexible support device with focusing function according to claim 1, characterized in that: An arc groove group is also provided on the side of the flexible support opposite to the circular step.

7. The flexible support device with focusing function according to claim 6, characterized in that: The outer contour of the flexible support is a polygon.

8. The flexible support device with focusing function according to claim 7, characterized in that: The outer contour of the flexible support is a hexagon.

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