A device and system for flying a flag on an extraterrestrial body

Abstract

The present disclosure provides a device and a system for flying a flag of an extraterrestrial object, the device comprising: a flagpole; a winder arranged at one end of the flagpole; a rope wound on the winder and extending along the flagpole from the winder to the other end of the flagpole, the rope continuing to extend along the flagpole back to the winder after passing around the other end of the flagpole, a flag being fixed to the rope; a driver for rotating the winder to move the rope along its extension direction relative to the flagpole; a tensioning mechanism for tensioning the rope.

Description

Technical Field

[0001] This disclosure relates to the field of aerospace engineering, and more particularly to a device and system for raising and lowering flags on extraterrestrial bodies. Background Technology

[0002] With the development of aerospace technology, human exploration of space is deepening, and extraterrestrial bodies such as the Moon and Mars are gradually becoming hot topics of exploration. Furthermore, the successful deployment and operation of the flag-raising device also serves as a verification of spacecraft landing, deployment, and operational technologies, and is of great significance for subsequent scientific experiments and exploration missions.

[0003] On Earth, flag raising and lowering primarily relies on a rope-tethered system. This design is simple and easy to maintain; the flag is fixed to a short pole, and a pulley at the top of the pole pulls the pole up and down, thus raising or lowering the flag. This traditional method is suitable for Earth's environment because it doesn't need to consider extreme weather and environmental factors. However, applying this method to extraterrestrial environments faces significant challenges because extraterrestrial environments are fundamentally different from Earth's.

[0004] Extraterrestrial objects may exhibit intense ultraviolet radiation, high-energy cosmic rays, and fine dust, posing severe challenges to the materials and structure of flag-raising devices. Furthermore, the devices may experience harsh mechanical environments such as vibration and impact during transport to these objects, potentially damaging components. Therefore, traditional flag-raising methods require significant improvements to adapt to the unique environments of extraterrestrial objects. To overcome these challenges, a novel flag-raising device needs to be designed. It must be able to withstand the impacts of the mechanical environment without damage, prevent the lifting mechanism from becoming jammed by tiny dust particles on the extraterrestrial object, ensure smooth flag raising and lowering, and withstand extreme environments such as strong radiation on the extraterrestrial object to guarantee the reliability of the lifting mechanism and the effectiveness of flag raising. These requirements render traditional flag-raising methods unsuitable for extraterrestrial objects, necessitating the development of entirely new technological solutions. Summary of the Invention

[0005] This disclosure provides an apparatus and system for raising and lowering flags on extraterrestrial bodies, which can ensure the stability and reliability of flag raising and lowering in the extreme environment of extraterrestrial bodies.

[0006] The technical solution disclosed herein is implemented as follows:

[0007] In a first aspect, this disclosure provides a device for raising and lowering a flag on an extraterrestrial body, the device comprising:

[0008] flagpole;

[0009] A winder, the winder being disposed at one end of the flagpole;

[0010] A rope, the rope being wound around the winder and extending from the winder along the flagpole to the other end of the flagpole, the rope passing around the other end of the flagpole and continuing to extend along the flagpole back to the winder, the flag being secured to the rope;

[0011] A driver for rotating the winder to move the rope relative to the flagpole along its own extension direction;

[0012] Tensioning mechanism, which is used to tension the rope.

[0013] In some optional examples, the tensioning mechanism includes:

[0014] A bracket, which is fixed to the flagpole and has a first guide portion;

[0015] A sliding shaft having a second guide portion that cooperates with the first guide portion, so that the sliding shaft can move under the guidance of the first guide portion;

[0016] A roller is mounted on the sliding shaft in a manner that allows it to rotatably about the sliding shaft, and the rope passes around the roller;

[0017] A spring, one end of which is fixed to the bracket, and the other end of which is fixed to the sliding shaft.

[0018] In some alternative examples, the flagpole includes a first pole section and a second pole section, which are hinged together such that the flagpole can switch between a first state in which the first pole section and the second pole section are side by side and a second state in which the first pole section and the second pole section are at 90° to each other, with the flag moving relative to the second pole section.

[0019] In some optional examples, the hinge is a shape memory hinge.

[0020] In some alternative examples, the tensioning mechanism is located at the end of the second rod adjacent to the hinge.

[0021] In some alternative examples, the second rod portion is formed with a groove, and the device further includes a slider that engages with the groove to facilitate movement within the groove, the slider being fixed to the rope and the flag being fixed to the slider.

[0022] In some alternative examples, the first rod portion forms a closed first cable routing groove and a closed second cable routing groove, and the second rod portion forms a closed third cable routing groove, through which the rope passes.

[0023] In some alternative examples, the second rod portion is formed with a series of S-shaped channels arranged longitudinally along the second rod portion, each channel extending between the slide and the outer wall of the second rod portion, and the first end of each channel leading to the slide is further away from the hinge than the second end leading to the outer wall of the second rod portion.

[0024] In some optional examples, a lubricant is applied between the groove and the slider.

[0025] Secondly, this disclosure provides a system for raising and lowering a flag on an extraterrestrial body, the system comprising:

[0026] The device for raising and lowering a flag on an extraterrestrial body as described in the first aspect;

[0027] A launch vehicle for launching the device to the extraterrestrial body.

[0028] This disclosure provides a device and system for raising and lowering a flag on an extraterrestrial body. The device is equipped with a tensioning mechanism, a design that keeps the rope taut and effectively prevents contact and friction with components such as the flagpole. This friction reduction not only helps extend the service life of the rope and flagpole but also reduces heat generated by friction, which is particularly important in the extreme temperatures of extraterrestrial environments. Since the rope is subjected to continuous tension during use, slack may occur, affecting the stable raising and lowering of the flag. The tensioning mechanism ensures that the rope maintains appropriate tension even under creep conditions, guaranteeing smooth rope movement and stable flag raising and lowering, unaffected by creep. Furthermore, the continuous tension of the rope allows for faster and more accurate raising and lowering actions, improving efficiency. The tensioning mechanism also ensures that the rope does not slack under accidental impacts or load changes, enhancing the reliability of the raising and lowering process. Considering the special environment of extraterrestrial bodies, the tensioning mechanism design helps maintain rope tension under extreme temperature, radiation, and dust conditions, ensuring stable operation of the device in various environments. Attached Figure Description

[0029] Figure 1 This is a perspective view of the device for raising and lowering a flag on an extraterrestrial body, provided in an embodiment of the present disclosure, in its first state.

[0030] Figure 2 This is a perspective view of the tensioning mechanism of the device provided in the embodiments of this disclosure.

[0031] Figure 3 This is a perspective view of the device for raising and lowering a flag on an extraterrestrial body, provided in an embodiment of this disclosure, in a second state.

[0032] Figure 4 A perspective view of the second pole portion of the flagpole of the device provided in an embodiment of this disclosure.

[0033] Figure 5 This is a side view of the second pole of the flagpole of the device provided in an embodiment of this disclosure.

[0034] Figure 6 A perspective view of the first pole portion of the flagpole of the device provided in an embodiment of this disclosure.

[0035] Figure 7 This is a side view of the first pole portion of the flagpole of the device provided in an embodiment of this disclosure.

[0036] Figure 8 An exploded perspective view of the second pole portion of the flagpole of the device provided in an embodiment of this disclosure. Detailed Implementation

[0037] The technical solutions in this disclosure will now be clearly and completely described with reference to the accompanying drawings.

[0038] With the accelerating pace of exploration of celestial bodies such as the Moon and Mars, the goal of displaying flags on extraterrestrial objects has become crucial. However, the extreme conditions in extraterrestrial environments, such as drastic temperature changes, intense radiation, and fine dust particles, pose unprecedented challenges to flag-raising and lowering systems. Furthermore, the equipment must withstand the severe vibrations and impacts during launch and landing on the extraterrestrial body, all of which could cause traditional raising and lowering systems to fail.

[0039] Faced with these challenges, traditional lifting systems are no longer suitable. A new type of lifting device is needed that can withstand extreme environments and remain operational even under the influence of minute dust particles, ensuring the smooth and reliable raising and lowering of the flag. The design of this device must take into account the special conditions of extraterrestrial bodies to guarantee its performance and durability in extreme environments.

[0040] The technical solution presented in this disclosure is designed precisely to address these specific requirements. For details, see [link to relevant documentation]. Figure 1 This disclosure provides an apparatus 10 for raising and lowering a flag F on an extraterrestrial body. The apparatus 10 may include a flagpole 11, a winder 12, a rope 13, an actuator 14, and a tensioning mechanism 15.

[0041] exist Figure 1In the diagram, the winder 12 is schematically shown by dashed lines because it is obscured by the base B. The winder 12 is located at one end 11A of the flagpole 11. The rope 13 is wound around the winder 12 and extends from the winder 12 along the flagpole 11 to the other end 11B of the flagpole 11. After passing around the other end 11B of the flagpole 11, the rope 13 continues to extend along the flagpole 11 back to the winder 12. The flag F is secured to the rope 13. The actuator 14 is used to rotate the winder 12, causing the rope 13 to move relative to the flagpole 11 along its extension direction. Specifically, one end of the rope 13 extending from the winder 12 can be fixed to the winder 12, and the segment of the rope 13 adjacent to this end can be wound onto the winder 12 in a first winding direction. The other end of the rope 13 extending back to the winder 12 can also be fixed to the winder 12, and the segment of the rope 13 adjacent to this other end can be wound onto the winder 12 in a second winding direction opposite to the first winding direction. Thus, when the winder 12 rotates, the rope 13 can be moved, thereby causing the flag F fixed to the rope 13 to rise and fall. The tensioning mechanism 15 is used to tension the rope 13.

[0042] Because the tensioning mechanism 15 is integrated into the device 10, the rope 13 can be kept continuously taut. This tautness effectively avoids interference and direct sliding friction between the rope 13 and other components of the device 10, such as the flagpole 11. Reducing sliding friction not only helps protect the rope 13 and the flagpole 11, extending their service life, but also reduces the heat generated by sliding friction, which is especially important in the extreme temperature environment of extraterrestrial bodies. During use, the rope 13 is continuously subjected to tension and inevitably creeps, which may cause the rope 13 to slack, thus affecting the lifting and lowering stability of the flag F. The tensioning mechanism 15 ensures that the rope 13 maintains appropriate tension even under creep, thereby ensuring the smooth movement of the rope 13 and the stability of the flag F lifting and lowering process, and preventing the lifting and lowering effect from being affected by the creep of the rope 13. Because the rope 13 is always taut, the lifting and lowering action is faster and more accurate, improving the lifting and lowering efficiency. At the same time, the presence of the tensioning mechanism 15 ensures that the rope 13 will not slack due to unexpected impacts or load changes during the lifting and lowering process, enhancing the reliability of the lifting and lowering process. Considering the special environment of extraterrestrial bodies, such as extreme temperatures, radiation, and dust, the design of the tensioning mechanism 15 helps to maintain the tension of the rope 13, ensuring the stability of the flag F's raising and lowering even under these extreme conditions. This design reduces system performance fluctuations caused by environmental changes, ensuring that the device 10 can operate normally in various environments.

[0043] In some embodiments of this disclosure, see Figure 2 and combined Figure 1The tensioning mechanism 15 may include a bracket 151, a sliding shaft 152, a roller 153, and a spring 154.

[0044] Bracket 151 is fixed to flagpole 11, such as in combination. Figure 1 It is easy to understand that the bracket 151 has a first guide portion 151G, as in Figure 2 As shown, the first guide portion 151G can be a vertically extending guide groove. The sliding shaft 152 is formed with a second guide portion 152G that mates with the first guide portion 151G, allowing the sliding shaft 152 to move under the guidance of the first guide portion 151G, as shown in... Figure 2 As shown, the second guide portion 152G can be a journal that matches the guide groove, and the sliding shaft 152 is capable of moving vertically. The roller 153 is mounted on the sliding shaft 152 in a manner that allows it to rotate about the sliding shaft 152, as shown in... Figure 2 As schematically shown by the elliptical arrow, rope 13 wraps around roller 153. One end 154A of spring 154 is fixed to bracket 151, and the other end 154B of spring 154 is fixed to sliding shaft 152. Thus, as in Figure 2 As shown, the spring 154 can apply a vertically downward force to the sliding shaft 152 and the roller 153 provided on the sliding shaft 152, and the rope 13 passing over the roller 153 will be tensioned.

[0045] The tensioning mechanism 15 consists of a bracket 151, a sliding shaft 152, a roller 153, and a spring 154. This design is simple and efficient. This simplified structure reduces the number of components, lowers the complexity of manufacturing and maintenance, and improves overall reliability. For example, in Figure 2 In the configuration shown, the tensioning mechanism 15 applies a vertically downward force to the sliding shaft 152 and the roller 153 via the spring 154, ensuring that the rope 13 is effectively tensioned. This design ensures that the tension of the rope 13 on the flagpole 11 is uniform and stable, avoiding the problem of unstable flag raising and lowering caused by the slack of the rope 13. Since the sliding shaft 152 can move vertically within the first guide portion 151G, the tensioning mechanism 15 can adjust the tension by changing the stiffness of the spring 154. This adjustment capability allows the device 10 to adapt to different load conditions and environmental changes, maintaining the stability of the flag raising and lowering process. Since the roller 153 can rotate around the sliding shaft 152, the rope 13 can pass over the roller 153 without sliding friction or with low friction, thereby reducing wear and extending the service life of the rope 13 and the tensioning mechanism 15. The simple structure and reliable performance of the tensioning mechanism 15 enable it to work stably in the extreme environments of extraterrestrial bodies. The constant tension provided by the spring 154 helps maintain the tension of the rope 13, and it can maintain its performance even under harsh conditions such as temperature changes, radiation and dust.

[0046] In some embodiments of this disclosure, see Figure 1 and Figure 3 The flagpole 11 may include a first pole portion 111 and a second pole portion 112, which are hinged together by a hinge 16, allowing the flagpole 11 to be in a first state where the first pole portion 111 and the second pole portion 112 are side by side (as in...). Figure 3 The second state (as shown in the figure) is 90° to the first rod 111 and the second rod 112 (as shown in the figure). Figure 1 Conversion between (as shown in) Figure 1 The flag F shown in the figure moves relative to the second pole 112.

[0047] During the launch of the device 10 to an extraterrestrial body, the flagpole 11 can adjust the first pole section 111 and the second pole section 112 to a first state where they are side by side via the hinge 16, thus saving space. This design minimizes the space occupied by the device 10 during transportation, improving launch efficiency and economy. When it is necessary to raise or lower the flag F, the flagpole 11 can adjust the first pole section 111 and the second pole section 112 to a second state where they are 90° apart via the hinge 16 to display the raising of the flag F. This rapid conversion capability allows the flag F to be displayed quickly and effectively, enhancing the display effect and visual impact. The flagpole 11 connects the first pole section 111 and the second pole section 112 via the hinge 16. This design provides structural stability, ensuring that the flagpole 11 can reliably convert its state and display the flag F even in the harsh environment of an extraterrestrial body. The design of the flagpole 11 allows it to adapt to different extraterrestrial environments and mission requirements. Whether it is the space-saving requirement during launch or the display requirement after landing, the flagpole 11 can meet these requirements, demonstrating strong adaptability. The state transition operation of the flagpole 11 is simple and can be achieved through the hinge 16, without the need for complicated mechanical operations, which reduces the difficulty of operation and the probability of error.

[0048] In addition, Figure 1 and Figure 3 The diagram also shows that the first rod 111 and the base B are hinged together, so that when the base B remains stationary, the first rod 111 can... Figure 1 The horizontal state shown in the figure is similar to that shown in the figure. Figure 3 The transitions between vertical states are shown in the diagram.

[0049] In some embodiments of this disclosure, hinge 16 may be a shape memory hinge.

[0050] Shape memory hinges do not have the complex gap structure of traditional spring hinges, fundamentally avoiding deployment failure caused by dust from extraterrestrial bodies getting stuck in the hinge gaps. For example... Figure 1 and Figure 3As shown, the flagpole 11, with its first pole portion 111 and second pole portion 112 connected by a shape memory hinge, is not affected by dust accumulation during state transitions, thus improving the reliability of the device 10 in harsh environments. The use of the shape memory hinge provides a smooth unfolding process, such as... Figure 1 and Figure 3 As shown, when the flagpole 11 transitions from the first state to the second state, the shape memory hinge smoothly drives the rotation of the second pole 112, avoiding sudden impacts caused by rapid or uneven movement. The shape memory hinge effectively reduces vibration during the flagpole 11 state transition, protecting components such as the flag F from damage. This smooth transition reduces physical stress on the flag F and other potentially sensitive components, lowering the risk of vibration-induced damage. The shape memory hinge precisely controls the rotation of the flagpole 11, ensuring that the flag F maintains the correct position and attitude throughout the transition. This precision is crucial for accurately displaying the flag F on extraterrestrial bodies. Due to its unique material properties, the shape memory hinge exhibits higher durability and reliability. Even after multiple state transitions, the shape memory hinge retains its performance, reducing maintenance needs and potential failure rates.

[0051] In some embodiments of this disclosure, see Figure 1 and Figure 3 The tensioning mechanism 15 can be located at the end of the second rod 112 adjacent to the hinge 16.

[0052] Thus, regardless of Figure 1 The first rod portion 111 and the second rod portion 112 shown are at 90° to each other, or as... Figure 3 The first pole section 111 and the second pole section 112 shown are arranged side by side, and the rope 13 passes around the roller 153. This allows the roller 153 to provide reliable tension to the rope 13. This design ensures that the rope 13 maintains appropriate tension in any state of the flagpole 11, reducing raising and lowering errors caused by rope slack and ensuring the accuracy and consistency of flag F raising and lowering. Furthermore, this arrangement of the tensioning mechanism 15 optimizes the spatial layout of the device 10, making the arrangement between the flagpole 11 and the tensioning mechanism 15 compact and efficient.

[0053] In some embodiments of this disclosure, see Figure 4 and Figure 5 and combined Figure 1 The second rod portion 112 may be formed with a groove 112G, and the device 10 may further include a slider 17 that cooperates with the groove 112G to facilitate movement within the groove 112G, the slider 17 being fixed as if in Figure 1 The rope 13 shown in the image, with the flag F fixed to the slider 17, is as follows: Figure 1 As shown in the image.

[0054] The cooperation between slider 17 and chute 112G ensures that flag F rises and falls along a fixed path, reducing the impact of external mechanical environment on the raising and lowering process of flag F. Because slider 17 moves strictly along the extension path of chute 112G, this ensures a more stable raising and lowering process for flag F. Even if rope 13 swings or oscillates relative to flagpole 11, the fixed movement path of slider 17 prevents flag F from swinging or oscillating with rope 13, thus ensuring the stability of flag F's display. The structural design of slider 17 allows it to withstand the mechanical environment of vibration and impact during ground storage, launch, transfer, and landing on extraterrestrial bodies. The precise movement of slider 17 within chute 112G improves the reliability of device 10. This precise movement reduces unexpected situations caused by rope 13 swinging or slack, ensuring the safety and reliability of flag F's raising and lowering process. The cooperation between slider 17 and chute 112G optimizes the mechanical transmission efficiency, allowing the driving force of actuator 14 on rope 13 to be more effectively converted into the raising and lowering action of flag F, improving the raising and lowering efficiency of device 10.

[0055] In some embodiments of this disclosure, see Figures 5 to 7 and combined Figure 1 The first rod portion 111 may form a closed first cable routing groove G1 and a closed second cable routing groove G2, and the second rod portion 112 may form a closed third cable routing groove G3. The rope 13 passes through the first cable routing groove G1, the second cable routing groove G2 and the third cable routing groove G3.

[0056] By designing enclosed first cable routing grooves G1, second cable routing grooves G2, and third cable routing grooves G3 in the first pole section 111 and the second pole section 112, the rope 13, except for the portion extending in the slide groove 112G, is completely enclosed inside the flagpole 11. This design effectively avoids direct radiation to the rope 13 from ultraviolet rays and high-energy cosmic rays from extraterrestrial bodies, thus protecting the rope 13 from radiation-induced aging and damage. Because the rope 13 is enclosed within the first cable routing grooves G1, second cable routing grooves G2, and third cable routing grooves G3, the service life of the rope 13 is extended. This protection reduces the degradation of the material properties of the rope 13 due to radiation, maintaining the strength and durability of the rope 13. The rope 13 is a key component for raising and lowering the flag F. By protecting the rope 13 from external environmental influences, the reliability of the raising and lowering function of the device 10 is maintained, allowing the flag F to be raised and lowered normally even in harsh extraterrestrial environments. Because the rope 13 is protected, the frequency of replacement due to radiation damage is reduced, thereby lowering maintenance costs and complexity. On extraterrestrial bodies, any equipment malfunction could lead to mission failure. By using the protective rope 13, the critical functions of the device 10 are ensured, thus improving the success rate of mission execution.

[0057] In addition, the cross-sectional areas of the first cable tray G1, the second cable tray G2, and the third cable tray G3 can be much larger than the cross-sectional area of ​​the rope 13, in order to reduce the risk of dust particles from extraterrestrial bodies intruding into the cable trays and causing the flag F to get stuck during raising and lowering.

[0058] In some embodiments of this disclosure, see Figure 8 and combined Figure 1 The second rod portion 112 is formed with a series of S-shaped channels C arranged longitudinally along the second rod portion 112. Each channel C extends between the slide groove 112G and the outer wall 112W of the second rod portion 112. The first end C1 of each channel C leading to the slide groove 112G is further away from the hinge 16 than the second end C2 leading to the outer wall 112W of the second rod portion 112.

[0059] The structural design of channel C obstructs the flow of dust into chute 112G under external force. Simultaneously, the angled channel C facilitates the movement of dust from inside to outside chute 112G in a microgravity environment. This design improves dust removal efficiency and reduces dust accumulation within chute 112G. In other words, channel C functions similarly to a Tesla valve, effectively preventing jamming of slider 17 caused by dust intrusion from extraterrestrial bodies, ensuring smooth raising and lowering of flag F even in dusty environments. Since the fit between slider 17 and chute 112G needs to be relatively tight, the design of channel C reduces dust interference with the raising and lowering movement of slider 17, ensuring the stability and accuracy of flag F's raising and lowering process. By reducing jamming and wear caused by dust, the design of channel C improves the reliability and durability of device 10, reducing maintenance requirements and extending the service life of device 10. On extraterrestrial bodies, any equipment failure can lead to mission failure; by reducing jamming during the raising and lowering of slider 17, the design of channel C increases the success rate of mission execution.

[0060] In addition, the width of the channel C can be determined based on the dust characteristics of extraterrestrial objects. For example, the width of the channel C can be set to 1 mm for the lunar environment.

[0061] In some embodiments of this disclosure, a lubricant may be applied between the groove 112G and the slider 17, such as molybdenum disulfide.

[0062] Applying lubricants such as molybdenum disulfide between the groove 112G and the slider 17 significantly reduces the coefficient of friction between them. This friction reduction helps protect the slider 17 and the groove 112G, reduces wear caused by friction, and extends their service life. Because the lubricant reduces friction between the slider 17 and the groove 112G, the raising and lowering process of the flag F becomes smoother, the raising and lowering speed is more uniform, and the overall efficiency of the raising and lowering operation is improved. In extraterrestrial environments, such as the Moon or Mars, dust is a major environmental factor. The application of lubricant enhances the adaptability of the device 10 to these environments, enabling it to operate stably in dusty environments.

[0063] In addition, the slider 17 can be made of polyimide self-lubricating composite material, which has good self-lubricating properties, making the slider 17 move more smoothly in the slide groove 112G and reducing the risk of jamming. Furthermore, the slide groove 112G can be made of magnesium alloy, which, when used with the slider 17 made of polyimide self-lubricating composite material, can effectively prevent low-temperature cold welding between the slider 17 and the slide groove 112G.

[0064] This disclosure also provides a system for raising and lowering a flag F on an extraterrestrial body, not shown in the accompanying drawings. The system may include a device 10 for raising and lowering a flag F on an extraterrestrial body according to the foregoing embodiments of this disclosure, and a launch vehicle for launching the device 10 to the extraterrestrial body.

[0065] It should be noted that the technical solutions described in this disclosure can be combined arbitrarily as long as they do not conflict.

[0066] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A device for raising and lowering a flag on an extraterrestrial body, characterized in that, The device includes: flagpole; A winder, the winder being disposed at one end of the flagpole; A rope, the rope being wound around the winder and extending from the winder along the flagpole to the other end of the flagpole, the rope passing around the other end of the flagpole and continuing to extend along the flagpole back to the winder, the flag being secured to the rope; A driver for rotating the winder to move the rope relative to the flagpole along its own extension direction; A tensioning mechanism is used to tension the rope. The flagpole includes a first pole section and a second pole section, which are hinged together, allowing the flagpole to switch between a first state where the first and second pole sections are side-by-side and a second state where they are at 90° to each other, with the flag moving relative to the second pole section. The second rod portion has a groove, and the device further includes a slider that cooperates with the groove to move within it. The slider is fixed to the rope, and the flag is fixed to the slider. The first rod portion has a closed first cable routing groove and a closed second cable routing groove, and the second rod portion has a closed third cable routing groove. The rope passes through the first cable routing groove, the second cable routing groove, and the third cable routing groove. The second rod portion has a series of S-shaped channels arranged longitudinally along the second rod portion. Each channel extends between the slide and the outer wall of the second rod portion, and the first end of each channel leading to the slide is further away from the hinge than the second end leading to the outer wall of the second rod portion.

2. The device for raising and lowering a flag on an extraterrestrial body according to claim 1, characterized in that, The tensioning mechanism includes: A bracket, which is fixed to the flagpole and has a first guide portion; A sliding shaft having a second guide portion that cooperates with the first guide portion, so that the sliding shaft can move under the guidance of the first guide portion; A roller is mounted on the sliding shaft in a manner that allows it to rotatably about the sliding shaft, and the rope passes around the roller; A spring, one end of which is fixed to the bracket, and the other end of which is fixed to the sliding shaft.

3. The device for raising and lowering a flag on an extraterrestrial body according to claim 1, characterized in that, The hinge is a shape memory hinge.

4. The device for raising and lowering a flag on an extraterrestrial body according to claim 1, characterized in that, The tensioning mechanism is located at the end of the second rod adjacent to the hinge.

5. The device for raising and lowering a flag on an extraterrestrial body according to claim 1, characterized in that, A lubricant is applied between the groove and the slider.

6. A system for raising and lowering a flag on an extraterrestrial body, characterized in that, The system includes: An apparatus for raising and lowering a flag on an extraterrestrial body according to any one of claims 1 to 5; A launch vehicle for launching the device to the extraterrestrial body.

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