Spatial flexible extension light shield based on multi-section electric telescopic rod and spacecraft

Abstract

The invention provides a space flexible extension light shield based on a multi-section electric telescopic rod and a spacecraft, the space flexible extension light shield comprises a light shielding film and a plurality of telescopic rods, and the plurality of telescopic rods are fixedly installed on an external optical camera base along the circumferential direction; the external optical camera is located in an area defined by the telescopic rods arranged in the circumferential direction, and the shading film is installed between the adjacent telescopic rods; in the folding state, the telescopic rod is folded, and the shading film is synchronously folded and stored along with the telescopic rod; and in the unfolding state, the telescopic rods stretch, and the shading film is synchronously unfolded along with the telescopic rods. The electric telescopic rod mechanism is adopted as a stretching mechanism of the shading film, and compared with a traditional shading cover, the electric telescopic rod mechanism has the advantages of being controllable in stretching process, large in specific stiffness, large in driving force, simple in control mode and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of large-scale space deployment structures, and in particular to a space flexible expansion sunshade and a spacecraft based on multi-section electric telescopic rods. Background Art

[0002] Stray light and heat effects are important factors affecting the imaging quality of space optical cameras, especially the stray light and heat flux caused by the sun. Sunlight incident on the imaging system will cause large-scale dynamic changes in the system temperature and uneven local temperature distribution, affecting the imaging accuracy of the system, reducing the dynamic range of each detection band, and even converging through optical elements to generate high energy and burn the device. An effective way to solve this problem is to install an external sunshade at the aperture. The longer the sunshade, the better it can suppress stray light and heat flux caused by the sun's intrusion.

[0003] With the development of a new generation of large spacecraft, the aperture of space optical cameras is getting larger and larger. To meet the requirements of high-precision imaging, the aperture and height of the sunshade are also getting larger and larger. Due to the limitations of the rocket fairing space envelope and the overall structure of the satellite, it is urgent to break through the design technology of large-scale extendable sunshades in space.

[0004] At present, most of the major large-scale extendable sunshades are made of flexible sunshade film materials, and the sunshade film is extended and retracted through an extension mechanism. According to the different extension mechanisms, there are mainly memory alloy flip mechanism, inflatable extension mechanism, pod rod extension mechanism, hinge folding mechanism, spring extension mechanism, etc. After analysis, the following limitations were found: First, most sunshades are suitable for cylindrical extension, but not for conical sunshades; second, the overall weight of the sunshade is heavy and the base frequency is small, which cannot meet the needs of on-orbit applications. Summary of the invention

[0005] In view of the defects in the prior art, the object of the present invention is to provide a space flexible extendable sunshade and a spacecraft based on a multi-section electric telescopic rod.

[0006] The spatially flexible extendable sunshade based on a multi-section electric telescopic rod provided by the present invention comprises a sunshade film and a plurality of telescopic rods, wherein the plurality of telescopic rods are fixedly mounted on an external optical camera base along a circumferential direction, the external optical camera is located in an area enclosed by the circumferentially arranged telescopic rods, and the sunshade film is mounted between adjacent telescopic rods;

[0007] Folded state: the telescopic rod is folded, and the shading film is folded and stored synchronously with the telescopic rod;

[0008] Expanded state: the telescopic rod is extended, and the shading film is expanded synchronously with the telescopic rod.

[0009] Preferably, the telescopic rod comprises a fixed section fixedly arranged on the external optical camera base and a plurality of extension sections sequentially sleeved inside the fixed section.

[0010] Preferably, the shading film is divided into multiple independent sections according to the number of sections of the stretching section, and the head corner points on both sides of each section of the shading film are respectively connected to the head of the corresponding stretching section;

[0011] A fold along the vertical direction is arranged in the middle of each section of the shading film, and the folds between different shading films are arranged staggered;

[0012] Folded state: each extension section of the telescopic rod is folded inside the fixed section of the telescopic rod, and the shading film is folded and stored into an S shape synchronously with the telescopic rod to form a folding area, and multiple sections of the shading film are stacked, and the folding areas of the multiple sections of the shading film are staggered;

[0013] Expanded state: each extension section of the telescopic rod is extended in sequence, and the shading film is expanded synchronously with the telescopic rod.

[0014] Preferably, the heads of the fixed sections of adjacent telescopic rods are connected by a reinforcing rod.

[0015] Preferably, a tensioning spring is provided at the head of the extension joint, and the head corner points on both sides of the shading film are connected to the extension joint through the tensioning spring.

[0016] Preferably, in a projection perpendicular to the normal direction of the upper surface of the external optical camera base, the top of the telescopic rod extends upward in a direction away from the external optical camera, and the plurality of telescopic rods are axially symmetrically arranged;

[0017] In the unfolded state, the shading films between the multiple telescopic rods are combined to form an axisymmetric inverted cone-shaped shading cover.

[0018] Preferably, the telescopic rod further comprises a screw transmission structure, a motor drive assembly and a support seat, and the support seat is mounted on the external optical camera base;

[0019] The motor drive assembly is installed at the bottom of the support seat, the screw transmission structure includes a screw and a nut, the nut is arranged at the bottom of the extension joint, the screw is arranged inside the innermost extension joint and is connected with the nut, and the bottom end of the screw is connected to the motor drive assembly;

[0020] In the retracted state, the screw rod is connected to the nut at the bottom of the innermost extension section. When the extension section is extended into place under the action of the screw rod, the nut at the bottom of the adjacent extension section on the outside is driven to engage with the screw rod, thereby realizing the extension of multiple extension sections from the inside to the outside in sequence.

[0021] Preferably, the telescopic rod further comprises a locking assembly, and the locking assembly comprises a locking spring and a slot;

[0022] The locking spring is installed on the outer surface of the top of the extension joint, and the slot is located at the bottom of the nut. When the extension joint is extended into place, the slot of the nut at the bottom of the extension joint is engaged and locked with the locking spring at the top of the adjacent extension joint on the outside, so that the adjacent extension joints remain relatively fixed.

[0023] Preferably, the telescopic rod further comprises a locking and unlocking assembly, and the locking and unlocking assembly comprises a latch tongue and a spring locking ball;

[0024] The latch tongue and the locking ball are both installed on the outer surface of the top of the extension joint. When the adjacent extension joints are folded into place, the locking ball on the top of one extension joint is engaged and connected with the spring latch tongue on the top of another extension joint, and the friction locking between the spring locking ball and the latch tongue is achieved through the elastic force of the spring locking ball.

[0025] The spacecraft provided by the present invention comprises the space flexible extendable sunshade based on the multi-section electric telescopic rod, and the sunshade is installed on the outside of the optical camera possessed by the spacecraft.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention adopts an electric telescopic rod mechanism as the extension mechanism of the shading film. Compared with the traditional shading cover, it has the advantages of controllable extension process, large specific stiffness, large driving force, simple control method, etc.

[0028] 2. The present invention adopts the technical means of arranging the shading film in sections, expanding and retracting in two dimensions, and unfolding it section by section along with the telescopic rod. It has the characteristics of simple folding and unfolding and suitable for cone-shaped unfolding.

[0029] 3. The present invention adopts the technical means of staggered arrangement of folding areas between different sections of shading films, which can reduce the stacking thickness between the shading films when they are folded. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention in a folded state;

[0032] Figure 2 It is a schematic diagram of the overall structure of the present invention in an unfolded state;

[0033] Figure 3 It is a structural schematic diagram of the telescopic rod in the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the light-shielding film in the present invention;

[0035] Figure 5 It is a partial enlarged view of the screw transmission structure in the present invention;

[0036] Figure 6 It is a partial enlarged view of the locking assembly in the present invention;

[0037] Figure 7 It is a partial enlarged view of the locking and unlocking assembly in the present invention in the axial direction.

[0038] The figure shows:

[0039] Long telescopic rod 1 Tab 1-4-1

[0040] Extension joint 1-1 Spring lock ball 1-4-2

[0041] Screw drive structure 1-2 Motor drive assembly 1-5

[0042] Screw 1-2-1 Support seat 1-6

[0043] Nut 1-2-2 Short telescopic rod 2

[0044] Locking assembly 1-3 Reinforcement rod 3

[0045] Locking spring 1-3-1 Shading film 4

[0046] Card slot 1-3-2 Integrated control box 5

[0047] Lock and unlock components 1-4 DETAILED DESCRIPTION

[0048] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0049] The present invention overcomes the shortcomings of the prior art, innovates the sunshade extension mechanism and the flexible sunshade film folding and unfolding implementation form, discloses a space flexible extendable sunshade and spacecraft based on a multi-section electric telescopic rod, which is suitable for the requirements of shading and heat insulation of space large-field optical cameras, etc. Its working states include a folded and locked state, an unfolding process and a fully unfolded state, and has wide versatility and adaptability.

[0050] The space-flexible extendable sunshade based on the multi-section electric telescopic rod provided by the present invention comprises a sunshade film 4 and a plurality of telescopic rods, wherein the plurality of telescopic rods are fixedly mounted on the external optical camera base along the circumferential direction, the external optical camera is located in the area surrounded by the telescopic rods arranged circumferentially, and the sunshade film 4 is installed between adjacent telescopic rods; the heads of the fixed sections of adjacent telescopic rods are connected by reinforcing rods 3. Figure 1 The figure shows the folded state: the telescopic rod is folded, and the shading film 4 is folded and stored synchronously with the telescopic rod;

[0051] like Figure 2 The figure shows the unfolded state: the telescopic rod is extended, and the shading film 4 is unfolded synchronously with the telescopic rod.

[0052] The telescopic rod includes a fixed section fixedly arranged on the external optical camera base and a plurality of extension sections 1-1 sequentially sleeved inside the fixed section. The light shielding film 4 is divided into multiple independent sections according to the number of sections of the extension section 1-1, and the head corners on both sides of each section of the light shielding film 4 are respectively connected to the head of the corresponding extension section 1-1; the multiple sections of the light shielding film 4 are independently arranged and not connected to each other, and can realize two-dimensional folding and unfolding, and the middle part of each section of the light shielding film 4 is provided with a fold along the vertical direction, and the folds between different light shielding films 4 are staggered;

[0053] Folded state: each extension section 1-1 of the telescopic rod is folded inside the fixed section of the telescopic rod, and the shading film 4 is folded and stored into an S shape synchronously with the telescopic rod to form a folding area, and multiple sections of the shading film 4 are stacked, and the folding areas of the multiple sections of the shading film 4 are staggered;

[0054] Expanded state: each extension section 1 - 1 of the telescopic rod is extended in sequence, and the shading film 4 is expanded synchronously with the telescopic rod.

[0055] The folded and unfolded states are as follows Figure 4 As shown, the light shielding film 4 is composed of multiple sections, and the number of sections is the same as the number of sections of the stretching section 1-1. The head of each section is connected to the head of the stretching section 1-1. When folded, each section is overlapped at the bottom with the stretching section 1-1. Each section of the trapezoidal light shielding film 4 is overlapped along the two sides of the trapezoidal vertical line to form an S-shaped folding and folding, and the vertical lines of each section of the trapezoidal film are staggered to achieve uniform thickness of the entire light shielding film 4 when folded. When unfolded, each section of the trapezoidal light shielding film 4 is synchronously stretched along the S-shaped trajectory with the stretching section 1-1. The head corners on both sides of the light shielding film 4 are connected to the stretching section 1-1 through tensioning springs. After being stretched in place, the light shielding film is tensioned and adjusted by the spring.

[0056] On a projection perpendicular to the normal of the upper surface of the external optical camera base, the top of the telescopic rod extends upward in a direction away from the external optical camera, and the multiple telescopic rods are axially symmetrically arranged; in the unfolded state, the shading films 4 between the multiple telescopic rods form an axially symmetrical inverted cone-shaped shading cover.

[0057] like Figure 5 As shown, the telescopic rod also includes a screw transmission structure 1-2, a motor drive assembly 1-5 and a support seat 1-6, and the support seat 1-6 is installed on the external optical camera base; the motor drive assembly 1-5 is installed at the bottom of the support seat 1-6, and the screw transmission structure 1-2 includes a screw 1-2-1 and a nut 1-2-2, and the nut 1-2-2 is arranged at the bottom of the extension joint 1-1, and the screw 1-2-1 is arranged inside the innermost extension joint 1-1 and is connected with the nut 1-2-2, and the bottom end of the screw 1-2-1 is connected to the motor drive assembly 1-5;

[0058] In the retracted state, the screw rod 1-2-1 is connected to the nut 1-2-2 at the bottom of the innermost extension section 1-1. When the extension section 1-1 is extended into place under the action of the screw rod 1-2-1, the nut 1-2-2 at the bottom of the adjacent extension section 1-1 located on the outside is driven to engage with the screw rod 1-2-1, thereby realizing the sequential extension of multiple extension sections 1-1 from the inside to the outside.

[0059] like Figure 6 As shown, the telescopic rod also includes a locking assembly 1-3, and the locking assembly 1-3 includes a locking spring 1-3-1 and a slot 1-3-2; the locking spring 1-3-1 is installed on the outer surface of the top of the extension section 1-1, and the slot 1-3-2 is located at the bottom of the nut 1-2-2. When the extension section 1-1 is extended to the right position, the slot 1-3-2 of the nut 1-2-2 at the bottom of the extension section 1-1 is engaged and locked with the locking spring 1-3-1 at the top of the adjacent extension section 1-1 on the outside, so that the adjacent extension sections 1-1 remain relatively fixed. When the two extension sections 1-1 remain fixed, the screw rod 1-2-1 engages with the nut 1-2-2 at the bottom of the extension section 1-1 on the outside, so that the extension section 1-1 on the outside continues to expand.

[0060] like Figure 7 As shown, the telescopic rod also includes a locking and unlocking assembly 1-4, which includes a latch 1-4-1 and a spring lock ball 1-4-2; the latch 1-4-1 and the lock ball 1-4-2 are both installed on the outer surface of the top of the extension joint 1-1, and when the adjacent extension joints 1-1 are retracted into place, the lock ball 1-4-2 at the top of one extension joint 1-1 is engaged and connected with the spring latch 1-4-1 at the top of another extension joint 1-1, and the friction locking between the spring lock ball 1-4-2 and the latch 1-4-1 is achieved by the elastic force of the spring lock ball 1-4-2. When the screw rod 1-2-1 moves and drives the extension joint 1-1 to unfold, the spring lock ball 1-4-2 and the latch 1-4-1 are unlocked under the action of thrust.

[0061] Example 1

[0062] This embodiment discloses a space flexible stretchable sunshade based on a multi-section electric telescopic rod. The entire sunshade consists of four groups of electric telescopic rods, a flexible sunshade film 4, a drive controller, and a reinforcing rod 3, forming an axisymmetric pentahedron beveled inverted cone sunshade. The electric telescopic rod is based on the principle of screw nut sliding spiral transmission, and adopts the form of multi-section sets extending and locking section by section; the flexible sunshade film 4 adopts the form of segmented S-shaped folding sets, which is unfolded and tensioned section by section with the telescopic rod; the drive controller adopts the torque motor + rotary transformer direct drive mode to drive and control the four groups of telescopic rods to extend synchronously in sequence.

[0063] The folded state of the space flexible extension sunshade based on the multi-section electric telescopic rod is as follows Figure 1 As shown, the expanded state is Figure 2 As shown, it includes a long telescopic rod 1, a short telescopic rod 2, a reinforcing rod 3, a light shielding film 4, and an integrated control box 5. The long and short telescopic rods are fixed on the camera base, with two long telescopic rods 1 in the middle and two short telescopic rods 2 on both sides. The reinforcing rod 3 horizontally connects and fixes the heads of the four telescopic rod fixed sections to strengthen the light shielding cover. The light shielding film 4 is divided into sections according to the number of sections of the telescopic rod, and the head corner point of each section is connected to the head of each section of the telescopic rod. When launching, the telescopic rod extension section 1-1 is folded in the fixed tube, and the flexible light shielding cover is folded and stored in the fixed cabin synchronously with the telescopic rod.

[0064] The electric telescopic rod is mainly composed of a multi-section extension section 1-1, a screw rod 1-2-1 and a screw rod nut 1-2-2, a locking component 1-3, a locking and unlocking component 1-4, a motor drive component 1-5 and a support seat 1-6. Figure 3 As shown, the support seat 1-6 is connected to the camera bottom plate. The screw transmission structure 1-2 is composed of a screw 1-2-1 and a screw nut 1-2-2. When retracted, the two are already engaged. When extended, the screw 1-2-1 rotates to drive the nut 1-2-2 to move upward, and the nut 1-2-2 drives the corresponding extension section 1-1 to extend upward. The partial enlargement is shown in FIG. Figure 5 The locking spring 1-3-1 of the locking assembly 1-3 is installed on the side of the head of the extension joint 1-1. After being extended to the right position, the locking spring 1-3-1 is inserted into the slot 1-3-2 at the lower end of the screw nut 1-2-2 to achieve locking after being extended to the right position. The partial enlargement is shown in FIG. Figure 6 The locking and unlocking assembly 1-4 is composed of a latch 1-4-1 and a spring lock ball 1-4-2. When retracted, the latch 1-4-1 is inserted into the spring lock ball 1-4-2 to lock the adjacent rod sections. When extended, the spring lock ball 1-4-2 is forced to open, and the latch 1-4-1 is disengaged to unlock the adjacent rod sections. The partial enlargement is shown in FIG. Figure 7As shown. The long telescopic rod 1 is composed of 6 extension sections 1-1, and the short telescopic rod 2 is composed of 4 extension sections 1-1. When the telescopic rod is working, the motor drive assembly drives the screw rod 1-2-1 to rotate, and the nut 1-2-2 slides on the screw rod 1-2-1 connected to the extension section 1-1, thereby unlocking the locking and unlocking assembly 1-4 between the two rod sections. When the rods move into place, the rods are locked by the locking assembly 1-3, and then the two rod sections are synchronously extended under the drive of the nut 1-2-2, and this is repeated to achieve the extension of all rod sections.

[0065] The integrated control box 5 is used to control the operation of the telescopic rod motor drive assembly 1-5, and collect the rod extension distance and rod section arrival information in real time, which is used for controlling the rod extension speed and determining the arrival.

[0066] The spacecraft provided by the present invention comprises the space flexible extendable sunshade based on the multi-section electric telescopic rod, and the sunshade is installed on the outside of the optical camera possessed by the spacecraft.

[0067] In summary, this flexible extendable sunshade based on multi-section electric telescopic rods realizes the extension and support of the sunshade through the variable diameter multi-section electric telescopic rods. The extension height of the sunshade is determined by the height of each section of the telescopic rod and the number of rod sections. It has strong designability. The segmented setting of the sunshade film can realize the change of the sunshade film from three-dimensional folding to two-dimensional folding, which greatly reduces the difficulty of folding the sunshade film and the risk of not being able to stretch and hooking. The specific stiffness of the sunshade can be greatly improved by controlling the material selection and thickness of the telescopic rod, which has a wide range of application value.

[0068] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0069] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A space-flexible extendable sunshade based on a multi-section electric telescopic rod, characterized in that: It comprises a light shielding film (4) and a plurality of telescopic rods, wherein the plurality of telescopic rods are fixedly mounted on an external optical camera base along a circumferential direction, the external optical camera is located in an area surrounded by the telescopic rods arranged in a circumferential direction, and the light shielding film (4) is mounted between adjacent telescopic rods; Folded state: the telescopic rod is folded, and the light shielding film (4) is folded and stored synchronously with the telescopic rod; Expanded state: the telescopic rod is extended, and the light shielding film (4) is expanded synchronously with the telescopic rod.

2. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 1 is characterized in that: The telescopic rod comprises a fixed section fixedly arranged on an external optical camera base and a plurality of extension sections (1-1) which are sequentially sleeved inside the fixed section.

3. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 2 is characterized in that: The shading film (4) is divided into a plurality of independent sections according to the number of sections of the stretching section (1-1), and the head corner points on both sides of each section of the shading film (4) are respectively connected to the head of the corresponding stretching section (1-1); The middle part of each section of the light-shielding film (4) is provided with a fold along the vertical direction, and the folds between different light-shielding films (4) are staggered; In the folded state, each extension section (1-1) of the telescopic rod is folded inside the fixed section of the telescopic rod, and the shading film (4) is folded and stored into an S shape synchronously with the telescopic rod to form a folding area, and multiple sections of the shading film (4) are stacked and arranged, and the folding areas of the multiple sections of the shading film (4) are staggered; Expanded state: each extension section (1-1) of the telescopic rod is extended in sequence, and the light shielding film (4) is expanded synchronously with the telescopic rod.

4. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 2 is characterized in that: The heads of the fixed sections of adjacent telescopic rods are connected via a reinforcing rod (3).

5. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 3 is characterized in that: The head of the extension joint is provided with a tensioning spring, and the head corner points on both sides of the light shielding film (4) are connected to the extension joint (1-1) through the tensioning spring.

6. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 1 is characterized in that: On a projection perpendicular to the normal direction of the upper surface of the external optical camera base, the top of the telescopic rod extends upward in a direction away from the external optical camera, and the plurality of telescopic rods are axially symmetrically arranged; In the unfolded state, the shading films (4) between the plurality of telescopic rods are combined to form an axisymmetric inverted cone-shaped shading cover.

7. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 2 is characterized in that: The telescopic rod also includes a screw transmission structure (1-2), a motor drive assembly (1-5) and a support base (1-6), and the support base (1-6) is installed on the external optical camera base; The motor drive assembly (1-5) is mounted at the bottom of the support seat (1-6); the screw transmission structure (1-2) comprises a screw (1-2-1) and a nut (1-2-2); the nut (1-2-2) is arranged at the bottom of the extension joint (1-1); the screw (1-2-1) is arranged inside the innermost extension joint (1-1) and is connected to the nut (1-2-2); the bottom end of the screw (1-2-1) is connected to the motor drive assembly (1-5); In the retracted state, the screw rod (1-2-1) is connected to the nut (1-2-2) at the bottom of the innermost extension section (1-1); when the extension section (1-1) is extended into place under the action of the screw rod (1-2-1), the nut (1-2-2) at the bottom of the adjacent extension section (1-1) located on the outer side is driven to engage with the screw rod (1-2-1), thereby realizing the sequential extension of the multiple extension sections (1-1) from the inside to the outside.

8. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 7 is characterized in that: The telescopic rod also includes a locking assembly (1-3), and the locking assembly (1-3) includes a locking spring (1-3-1) and a card slot (1-3-2); The locking spring (1-3-1) is installed on the outer surface of the top of the extension joint (1-1), and the clamping groove (1-3-2) is located at the bottom of the nut (1-2-2). When the extension joint (1-1) is extended into place, the clamping groove (1-3-2) of the nut (1-2-2) at the bottom of the extension joint (1-1) is engaged and locked with the locking spring (1-3-1) at the top of the adjacent extension joint (1-1) on the outside, so that the adjacent extension joints (1-1) are kept relatively fixed.

9. The spatially flexible extendable sunshade based on a multi-section electric telescopic rod according to claim 7, characterized in that: The telescopic rod also includes a locking and unlocking assembly (1-4), and the locking and unlocking assembly (1-4) includes a latch tongue (1-4-1) and a spring locking ball (1-4-2); The latch tongue (1-4-1) and the locking ball (1-4-2) are both mounted on the outer surface of the top of the extension joint (1-1); when adjacent extension joints (1-1) are folded into place, the locking ball (1-4-2) at the top of one extension joint (1-1) is engaged and connected with the spring latch tongue (1-4-1) at the top of another extension joint (1-1); and friction locking between the spring locking ball (1-4-2) and the latch tongue (1-4-1) is achieved through the elastic force of the spring locking ball (1-4-2).

10. A spacecraft, characterized in that: The invention comprises a space flexible extendable sunshade based on a multi-section electric telescopic rod as described in any one of claims 1 to 9, wherein the sunshade is installed on the outside of an optical camera possessed by a spacecraft.

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