Passive unfolding mechanism

Abstract

The invention belongs to the technical field of solar wings, and discloses a passive unfolding mechanism which comprises a bearing part, a rotating shaft, a curling arm and an abutting assembly. The rotating shaft is rotationally arranged on the bearing piece. One end of the curling arm is fixed to the rotating shaft, the curling arm can be wound to the rotating shaft, elastic potential energy is stored after the curling arm is wound, and the elastic potential energy is used for driving the rotating shaft to rotate so as to unfold the curling arm. The abutting assembly is arranged on the bearing piece, and the abutting assembly is configured to abut against the curling arm when the curling arm is unfolded, so that resistance is applied to the curling arm. According to the passive unfolding mechanism provided by the invention, the curling arm is wound through the rotating shaft, and the curling arm can be unfolded or folded by rotating the rotating shaft, so that the solar wing adopting the unfolding mechanism is simple in overall structure, small in size and capable of meeting the space requirement of a small spacecraft. The passive unfolding mechanism provided by the invention does not need to be powered by a motor, and is simple in structure and low in use cost.

Description

Technical Field

[0001] The present invention relates to the technical field of solar wings, and in particular to a passive deployment mechanism. Background Art

[0002] During the long-term operation of a spacecraft in orbit, it mainly relies on solar panels to provide it with electricity. When the spacecraft is launched, the solar panels are in a folded state to reduce the volume they occupy. After the spacecraft enters orbit, the solar panels are unfolded to generate electricity.

[0003] Traditional solar wings generally include rigid and foldable types. With the advancement of technology, flexible solar wings made of curling arms have begun to be explored and applied. Compared with traditional rigid solar wings, curling arms have significant advantages in terms of light weight, small folded volume and high storage ratio, showing great development potential.

[0004] However, most of the current curling arms use a scissor-fork type deployment mechanism, but this deployment mechanism will make the overall structure of the solar wing complex and bulky, and cannot meet the space requirements of small spacecraft. In addition, most of the current curling arms are powered by motors to achieve deployment and folding, which has a complex structure and high cost.

[0005] Therefore, the above problems need to be solved urgently. Summary of the invention

[0006] The purpose of the present invention is to provide a passive deployment mechanism to simplify the overall structure of the solar wing and reduce the volume of the solar wing, thereby meeting the space requirements of small spacecraft.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A passive deployment mechanism, the passive deployment mechanism comprising:

[0009] bearing member;

[0010] A rotating shaft, rotatably disposed on the bearing member;

[0011] A curling arm, one end of which is fixed on the rotating shaft, the curling arm can be rolled up on the rotating shaft, and the curling arm stores elastic potential energy after being rolled up, and the elastic potential energy is used to drive the rotating shaft to rotate so as to unfold the curling arm;

[0012] The pressing assembly is disposed on the carrier, and is configured to press the curling arm when the curling arm is unfolded, thereby applying resistance to the curling arm.

[0013] Preferably, the cross-section of the curling arm is C-shaped after being unfolded, and the curling arm is flattened and formed into a roll after being rolled up to generate and store the elastic potential energy.

[0014] Preferably, the passive unfolding mechanism further comprises a guide assembly arranged on one side of the rotating shaft, wherein the guide assembly comprises a guide channel for the curling arm to pass through, so that when the curling arm is unfolded, it is guided by the guide channel and restored to its C-shaped cross-section.

[0015] Preferably, the guide assembly comprises:

[0016] Mounting parts;

[0017] A first guide member, disposed on the mounting member;

[0018] The second guide member is arranged on the mounting member, and the first guide member and the second guide member form the guide channel.

[0019] Preferably, the adjacent ends of the first guide member and the second guide member are both pivotally connected to the mounting member;

[0020] The guide assembly further includes a first adjusting member and a second adjusting member, wherein the first adjusting member is used for elastically supporting the first guide member, and the second adjusting member is used for elastically supporting the second guide member.

[0021] Preferably, a plurality of positioning members are evenly distributed on the curling arm along its length direction, and after the curling arm is rolled into a roll, a plurality of the positioning members of any two adjacent layers can be snap-connected one by one.

[0022] Preferably, the passive deployment mechanism further comprises a speed control component disposed on the carrier, and the speed control component is used to control the rotation speed of the rotating shaft.

[0023] Preferably, the pressing component comprises:

[0024] A pressing shaft, rotatably disposed on the bearing member;

[0025] The pressing member is movably connected to the pressing shaft and has a tendency to move toward the rotating shaft to press the curling arm on the rotating shaft.

[0026] Preferably, the pressing component further comprises:

[0027] A guide member connected to the pressure shaft, wherein the guide member intersects with an extension direction of the pressure shaft;

[0028] A guide wheel is arranged on the guide member, and the guide wheel can abut against the curling arm when the curling arm starts to unfold or completes winding.

[0029] Preferably, the passive deployment mechanism further comprises a support member, and two ends of the pressure shaft are respectively arranged on the support member and the bearing member.

[0030] Beneficial effects of the present invention:

[0031] 1. The passive unfolding mechanism provided by the present invention winds up the curling arm through a rotating shaft, and the curling arm can be unfolded or folded by rotating the rotating shaft, so that the solar wing adopting the above-mentioned unfolding mechanism has a simple overall structure and a small size compared to the solar wing adopting the scissor-fork type unfolding mechanism, which can meet the space requirements of small spacecraft.

[0032] 2. The passive unfolding mechanism provided by the present invention stores elastic potential energy after the curling arm is wound around the rotating shaft. When the curling arm needs to be unfolded, the elastic potential energy is released to drive the rotating shaft to rotate, thereby unfolding the curling arm. Compared with the method of providing power by a motor, the structure is simple and the use cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The structure diagram of the passive deployment mechanism provided by the present invention is Figure 1 ;

[0034] Figure 2 The structure diagram of the passive deployment mechanism provided by the present invention is Figure 2 ;

[0035] Figure 3 is a structural schematic diagram of a guide assembly provided by the present invention;

[0036] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0037] In the figure:

[0038] 1. Bearing parts;

[0039] 2. Rotating shaft; 21. Skin;

[0040] 3. Curling arm; 31. Positioning piece;

[0041] 4. abutting assembly; 41. abutting shaft; 42. abutting member; 43. a guide member; 44. a guide wheel;

[0042] 5. Guide assembly; 51. Mounting member; 52. First guide member; 53. Second guide member; 54. First adjustment member; 55. Second adjustment member;

[0043] 6. Speed ​​control parts;

[0044] 7. Supporting parts; 71. Limiting pads. DETAILED DESCRIPTION

[0045] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0046] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0047] In the present application, the term "and / or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of a centrifugal vortex magnetic pump alone, the existence of a centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump at the same time, and the existence of a centrifugal vortex magnetic pump alone. In addition, the character " / " in the present application generally indicates that the objects associated before and after are in an "and / or" relationship.

[0048] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0049] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0050] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0051] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0052] See also Figures 1 to 4 The present embodiment provides a passive unfolding mechanism, which includes a carrier 1, a rotating shaft 2, a curling arm 3 and a pressing assembly 4. The rotating shaft 2 is rotatably disposed on the carrier 1. One end of the curling arm 3 is fixed on the rotating shaft 2, and the curling arm 3 can be rolled onto the rotating shaft 2. After the curling arm 3 is rolled, elastic potential energy is stored, and the elastic potential energy is used to drive the rotating shaft 2 to rotate so as to unfold the curling arm 3. The pressing assembly 4 is disposed on the carrier 1, and the pressing assembly 4 is configured to press the curling arm 3 when the curling arm 3 is unfolded, thereby applying resistance to the curling arm 3.

[0053] It is understandable that the curling arm 3 can be unfolded or retracted by rotating the rotating shaft 2 by winding the curling arm 3, so that the solar wing using the above-mentioned unfolding mechanism has a simple overall structure and a small volume compared to the solar wing using the scissor-fork unfolding mechanism, and can meet the space requirements of small spacecraft. It is also understandable that the curling arm 3 stores elastic potential energy after being wound around the rotating shaft 2, and when the curling arm 3 needs to be unfolded, the elastic potential energy is released to drive the rotating shaft 2 to rotate, thereby unfolding the curling arm 3, which is simple in structure and low in cost compared to the method of providing power by a motor.

[0054] It should be noted that the curling arm 3 is made of composite materials, such as carbon fiber reinforced composite materials. Carbon fiber has the characteristics of high specific strength (ratio of strength to density) and high specific modulus (ratio of modulus to density), which enables the curling arm 3 to withstand various mechanical loads during the unfolding and folding of the solar wing while reducing its own weight. In addition, its outer layer may also have a protective coating to resist high-energy particle radiation, atomic oxygen erosion, etc. in the space environment. In addition, in order to enable the curling arm 3 to unfold itself, that is, to enable the curling arm 3 to store elastic potential energy after winding, it is necessary to attach an elastic material (such as special rubber or elastic fiber) inside or outside the curling arm 3. When the curling arm 3 is in a curled state, the elastic material is stretched or compressed to store elastic potential energy. When the constraints on the curling arm 3 are released, the elastic potential energy of the elastic material is released, driving the curling arm 3 to unfold. At the same time, the carbon fiber composite material can provide the necessary support structure for the elastic material to ensure the stability and directionality of the unfolding process.

[0055] It should also be noted that the solar panel is usually directly attached to the surface of the curling arm 3. A special high-performance adhesive is generally used, which has high bonding strength, good weather resistance and temperature resistance, and can adapt to the complex conditions of the space environment. The adhesive is generally epoxy resin or silicone rubber, which can ensure that the solar panel is firmly attached while also playing a certain role in buffering and shock absorption.

[0056] In particular, the cross section of the curling arm 3 after unfolding is C-shaped, and the curling arm 3 is flattened and formed into a roll after being rolled up to generate and store elastic potential energy. It can be understood that the cross section of the curling arm 3 after unfolding is C-shaped, which enables the curling arm 3 to have a relatively large elastic deformation degree when it is rolled up to form a roll. According to the elastic potential energy formula, under the condition of a constant stiffness coefficient, a larger deformation amount means more elastic potential energy storage.

[0057] In addition, the curling arm 3 can be flattened to form a roll after winding, and this compact structure can greatly save space. During storage and transportation, the roll-shaped curling arm 3 is easier to stack and store than the unfolded state or other irregular curling shapes. It is more convenient to store in the limited space of the spacecraft, freeing up more space for other equipment, and during the launch process, it can also reduce the problems caused by excessive space occupation.

[0058] In order to enable the curling arm 3 to quickly return to its original C-shaped state when it is unfolded, the passive unfolding mechanism also includes a guide assembly 5 arranged on one side of the rotating shaft 2, and the guide assembly 5 includes a guide channel for the curling arm 3 to pass through, so that the curling arm 3 can be guided by the guide channel when it is unfolded and then restored to its C-shaped cross section. In this way, the guide channel provides a clear path and shape constraint for the unfolding of the curling arm 3. When the curling arm 3 is unfolded through the guide channel, it can accurately return to the state of having a C-shaped cross section. In addition, due to the regulating effect of the guide channel, the curling arm 3 can be restored to the C-shaped cross section through the same path each time it is unfolded. This makes the performance of the curling arm 3 in multiple unfolding-curling cycle operations have good repeatability and consistency.

[0059] Specifically, the guide assembly 5 includes a mounting member 51, a first guide member 52, and a second guide member 53. The first guide member 52 is disposed on the mounting member 51. The second guide member 53 is disposed on the mounting member 51, and the first guide member 52 and the second guide member 53 form a guide channel. It can be understood that the guide channel is prepared by splitting it into the first guide member 52 and the second guide member 53, which reduces the manufacturing difficulty compared to preparing an integral guide channel.

[0060] Furthermore, the adjacent ends of the first guide member 52 and the second guide member 53 are both pivotally connected to the mounting member 51. The guide assembly 5 also includes a first adjustment member 54 and a second adjustment member 55, wherein the first adjustment member 54 is used to elastically support the first guide member 52, and the second adjustment member 55 is used to elastically support the second guide member 53. It is understandable that the pivoting method allows the first guide member 52 and the second guide member 53 to rotate around the pivot, so that the angle of the guide channel can be flexibly adjusted according to the deployment requirements of the curling arm 3. In different application scenarios, the curling arm 3 may need to be deployed at different angles. When the solar panels of the satellite need to be deployed at a specific angle to obtain the best lighting, this pivoting structure can easily adjust the angle of the guide channel to ensure that the curling arm 3 accurately deploys the solar panels to a predetermined angle, thereby improving energy collection efficiency.

[0061] It can also be understood that different curling arms 3 may have differences in size and shape, and the pivoting structure can make the relative position and spacing between the first guide member 52 and the second guide member 53 easier to adjust. For thicker or thinner curling arms 3, the width of the guide channel can be increased or decreased by rotating the first guide member 52 and the second guide member 53; for curling arms 3 with special shapes, such as those with arcs or bends, the angles of the first guide member 52 and the second guide member 53 can also be adjusted to better fit the shape of the curling arm 3 and provide more accurate guidance. In addition, during the unfolding process of the curling arm 3, if there is a sudden external force impact or resistance change, the pivoted first guide member 52 and the second guide member 53 can buffer and absorb these impact forces to a certain extent. Because the guides can rotate around the pivot, when they are impacted, they can change the direction and size of force transmission by rotating, reduce damage to the curling arm 3 and other components, and improve the reliability and stability of the entire system.

[0062] It should be noted that the structures of the first adjustment member 54 and the second adjustment member 55 are consistent, and the structure of the first adjustment member 54 is used as an example for explanation below. One side of the first adjustment member 54 is pivotally connected to the mounting member 51, and the other side abuts against the first guide member 52 through a roller, and the first adjustment member 54 and the mounting member 51 are provided with an elastic support member 7, which can be selected according to the actual application scenario, such as a cylindrical helical spring, a rubber spring, a torsion spring, etc.

[0063] In order to enable the curling arm 3 to unfold or wind along a preset path, a plurality of positioning members 31 are evenly distributed on the curling arm 3 along its length direction, and after the curling arm 3 is wound into a roll, the multiple positioning members 31 of any two adjacent layers can be clamped one by one. When the curling arm 3 is wound into a roll, the positioning members 31 of the two adjacent layers are clamped one by one, just like a mortise and tenon structure, tightly connecting the layers together. This clamping method can effectively prevent the roll from sliding or loosening between layers when it is subjected to external forces (such as vibration, collision or axial pressure). For example, during transportation, even if the equipment is bumpy, due to the clamping effect of the positioning members 31, the structure of the roll can still remain intact to ensure that it is not damaged.

[0064] In addition, the presence of the positioning member 31 provides an accurate position reference for the curling of the curling arm 3. Each positioning member 31 has a corresponding clamping position during the curling process, so that the curling arm 3 can be curled in a predetermined manner and shape. This precise curling method ensures the consistency of the roll shape and size after each winding.

[0065] More importantly, when the curling arm 3 is rolled into a roll to store elastic potential energy, the clamping of the positioning member 31 helps to store energy stably. This is because the stable roll structure can ensure that the deformation of the elastic material is in the expected state, avoiding accidental loss or premature release of energy. During the unfolding process, the clamping of the positioning member 31 can release energy in a certain order. When the clamping is released, each layer of the curling arm 3 can be unfolded in an orderly manner, avoiding the situation where the curling arm 3 is unfolded out of control due to sudden release of energy, thereby achieving effective control of the unfolding process.

[0066] The unfolding speed of the solar wing is a crucial factor affecting its working stability. For this reason, the passive unfolding mechanism also includes a speed control member 6 disposed on the carrier 1, and the speed control member 6 is used to control the rotation speed of the rotating shaft 2 so that the curling arm 3 can unfold at a uniform speed. When the curling arm 3 unfolds too fast, the speed control member 6 increases the resistance applied to the rotating shaft 2 to limit the rotation speed of the rotating shaft 2, thereby limiting the unfolding speed. Conversely, when the curling arm 3 unfolds too slowly, the speed control member 6 reduces the resistance applied to the rotating shaft 2 to ensure the unfolding speed. With such a configuration, the speed control member 6 controls the rotation speed of the rotating shaft 2 in real time, thereby ensuring that the curling arm 3 unfolds at a uniform speed.

[0067] Preferably, the speed control member 6 is a rotary damper, which is arranged at one end of the rotating shaft 2. The rotary damper is mainly composed of damping oil and a reduction disc, which is coaxially arranged at the end of the rotating shaft 2. During the deployment process, the damping oil and the reduction disc rub against each other to generate resistance. It should be noted that the rotary damper is a prior art and will not be described in detail.

[0068] In the present embodiment, the pressing assembly 4 includes a pressing shaft 41 and a pressing member 42. The pressing shaft 41 is rotatably arranged on the bearing member 1. The pressing member 42 is movably connected to the pressing shaft 41 and has a tendency to move toward the rotating shaft 2 to press the curling arm 3 on the rotating shaft 2. It can be understood that the curling arm 3 can be unfolded more smoothly by the pressing member 42 abutting against the curling arm 3. In addition, the pressing member 42 can also provide a guiding effect for the curling arm 3 being unfolded. It should be noted that a roller is provided at the end of the pressing member 42, so that the curling arm 3 can be pressed by the roller, thereby avoiding crushing the curling arm 3. It should also be noted that the installation method of the pressing member 42 is consistent with the installation method of the first adjustment member 54 mentioned above, so it will not be described in detail. Of course, the pressing force of the pressing member 42 is provided by the elastic force of the elastic support member 7 used by the pressing member 42.

[0069] Generally speaking, the resistance encountered by the curling arm 3 when it starts to unfold or completes winding is relatively large. Therefore, in order to enable the curling arm 3 to start to unfold or complete winding more smoothly, the pressing assembly 4 further includes a guide member 43 and a guide wheel 44. The guide member 43 is connected to the pressing shaft 41, and the extension direction of the guide member 43 and the pressing shaft 41 intersect. The guide wheel 44 is disposed on the guide member 43, and the guide wheel 44 can abut against the curling arm 3 when the curling arm 3 starts to unfold or completes winding.

[0070] It is worth noting that when the curling arm 3 is unfolded or rolled up, the pressure shaft 41 is subjected to a large pressure, which causes it to vibrate. If the vibration of the pressure shaft 41 is not suppressed, the pressure shaft 41 is prone to deformation, thereby affecting the normal use of the curling arm 3. For this reason, in this embodiment, the passive unfolding mechanism also includes a support member 7, and the two ends of the pressure shaft 41 are respectively arranged on the support member 7 and the carrier 1. In this way, the pressure shaft 41 is rotatably connected to the support member 7 and the carrier 1 at both ends, forming a stable support structure. This structure can effectively disperse the pressure on the pressure shaft 41.

[0071] To prevent the pressing shaft 41 from axial movement, a limiting pad 71 is provided on the support member 7, and the pressing shaft 41 is disposed on the support member 7 through the limiting pad 71. The specific structure of the limiting pad 71 is designed according to the actual application scenario, so it is not described in detail in this embodiment.

[0072] In this embodiment, both ends of the rotating shaft 2 are supported and rotated by an angular contact bearing. In addition, both ends of the rotating shaft 2 are fixed with a cover 21, so as to protect the rotating shaft 2 and the curling arm 3 wound on the rotating shaft 2 to a certain extent, so as to prevent the rotating shaft 2 and the curling arm 3 from being corroded by external environmental factors such as dust, moisture, and corrosive gas, thereby extending the service life of the rotating shaft 2 and the curling arm 3.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A passive deployment mechanism, characterized in that: The passive deployment mechanism comprises: A carrier (1); A rotating shaft (2) rotatably disposed on the supporting member (1); A curling arm (3), one end of which is fixed on the rotating shaft (2); the curling arm (3) can be rolled up on the rotating shaft (2); and the curling arm (3) stores elastic potential energy after being rolled up, and the elastic potential energy is used to drive the rotating shaft (2) to rotate so as to unfold the curling arm (3); A pressing component (4) is arranged on the carrier (1), and the pressing component (4) is configured to press the curling arm (3) when the curling arm (3) is unfolded, thereby applying resistance to the curling arm (3).

2. A passive deployment mechanism according to claim 1, characterized in that: When the curling arm (3) is unfolded, its cross section is C-shaped. After being rolled up, the curling arm (3) is flattened and forms a roll to generate and store the elastic potential energy.

3. A passive deployment mechanism according to claim 2, characterized in that: The passive unfolding mechanism further comprises a guide assembly (5) arranged on one side of the rotating shaft (2), the guide assembly (5) comprising a guide channel for the curling arm (3) to pass through, so that when the curling arm (3) is unfolded, it is guided by the guide channel and restored to a C-shaped cross section.

4. A passive deployment mechanism according to claim 3, characterized in that: The guide assembly (5) comprises: Mounting member (51); A first guide member (52) is arranged on the mounting member (51); The second guide member (53) is arranged on the mounting member (51), and the first guide member (52) and the second guide member (53) form the guide channel.

5. A passive deployment mechanism according to claim 4, characterized in that: The adjacent ends of the first guide member (52) and the second guide member (53) are both pivotally connected to the mounting member (51); The guide assembly (5) further comprises a first adjusting member (54) and a second adjusting member (55), wherein the first adjusting member (54) is used for elastically supporting the first guide member (52), and the second adjusting member (55) is used for elastically supporting the second guide member (53).

6. The passive deployment mechanism according to claim 1, characterized in that: A plurality of positioning members (31) are evenly distributed on the curling arm (3) along its length direction, and after the curling arm (3) is rolled into a roll, the plurality of positioning members (31) in any two adjacent layers can be connected in a one-to-one correspondence.

7. The passive deployment mechanism according to claim 1, characterized in that: The passive deployment mechanism further comprises a speed control component (6) arranged on the carrier (1), wherein the speed control component (6) is used to control the rotation speed of the rotating shaft (2).

8. The passive deployment mechanism according to claim 1, characterized in that: The pressing component (4) comprises: A pressing shaft (41) is rotatably disposed on the bearing member (1); The pressing member (42) is movably connected to the pressing shaft (41) and has a tendency to move toward the rotating shaft (2) so as to press the curling arm (3) on the rotating shaft (2).

9. A passive deployment mechanism according to claim 8, characterized in that: The pressing component (4) further comprises: A guide member (43) connected to the pressing shaft (41), wherein the extension direction of the guide member (43) intersects with the extension direction of the pressing shaft (41); A guide wheel (44) is arranged on the guide member (43), and the guide wheel (44) can abut against the curling arm (3) when the curling arm (3) starts to unfold or completes winding.

10. A passive deployment mechanism according to claim 9, characterized in that: The passive deployment mechanism further comprises a support member (7), and two ends of the pressing shaft (41) are respectively arranged on the support member (7) and the bearing member (1).

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