Foldable and expandable armrest easy to mount outside space station cabin

Abstract

The invention relates to the technical field of manned spaceflight, in particular to a foldable armrest easy to mount outside a space station cabin, which comprises a base, an armrest, a first limiting mechanism and a locking mechanism, the handrail is rotatably mounted on the base; a limiting groove and a locking hole are formed in the handrail; the first limiting mechanism is mounted on the base and can be inserted into any limiting groove; the locking mechanism is installed on the base and can be inserted into any locking hole. During launching, the foldable unfolding handrail is in a folded state. After injection into a rail, the foldable and unfoldable handrail which is easily mounted outside the space station cabin can be freely switched between a folded state and an unfolded state. And compared with a traditional fixed handrail, the occupied space is small in the launching process, and the use flexibility is high. Compared with a traditional on-track detachable handrail, the on-track mounting process is avoided. Compared with a traditional handrail for the ground, the foldable handrail for the ground is always kept in a folded state and does not deform when bearing large centrifugal force, impact and vibration in the launching stage.

Description

Technical Field

[0001] The present invention relates to the field of manned space flight technology, and in particular to a foldable and deployable handrail which is easily installed outside a space station cabin. Background Art

[0002] At present, the handrails used in the space station are mainly divided into two types: fixed handrails and on-orbit detachable handrails. For fixed handrails, they need to be installed on the outer wall of the space station on the ground before launch. During the launch phase, they occupy a large space, which increases the difficulty and risk of launch. For on-orbit detachable handrails, astronauts are required to disassemble and install the handrails on-orbit. The on-orbit installation process is more complicated, time-consuming and labor-intensive.

[0003] Therefore, how to make the handrail foldable before launch and unfoldable after entering orbit becomes a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0004] The present invention provides a foldable and deployable handrail that is easily installed outside a space station cabin, so as to solve the problem of how to enable the handrail to be folded before launch and to be deployed after entering orbit, which becomes a technical problem to be solved urgently by those skilled in the art.

[0005] The present invention provides a foldable and deployable handrail that is easily installed outside a space station cabin, comprising:

[0006] Base;

[0007] The armrest is rotatably mounted on the base; the armrest is provided with more than two limit slots and more than two locking holes;

[0008] A first limiting mechanism is installed on the base and can be inserted into any limiting groove;

[0009] The locking mechanism is installed on the base and can be inserted into any locking hole.

[0010] In some of these embodiments, there are two bases;

[0011] One end of the handrail is rotatably connected to one of the bases, and the other end is rotatably connected to the other base; two limit slots and two locking holes are provided at both ends of the handrail;

[0012] There are two first limiting mechanisms, one of which is installed on one of the bases and can be inserted into any one of the two limiting grooves at one end, and the other is installed on the other base and can be inserted into any one of the two limiting grooves at the other end;

[0013] There are two locking mechanisms, one of which is installed on one of the bases and can be inserted into any one of the two locking holes at one end, and the other is installed on the other base and can be inserted into any one of the two locking holes at the other end.

[0014] In some of these embodiments, there are two bases;

[0015] One end of the handrail is rotatably connected to one of the bases, and the other end is rotatably connected to the other base; three limit slots and three locking holes are provided at both ends of the handrail;

[0016] There are two first limiting mechanisms, one of which is installed on one of the bases and can be inserted into any one of the three limiting grooves at one end, and the other is installed on the other base and can be inserted into any one of the three limiting grooves at the other end;

[0017] There are two locking mechanisms, one of which is installed on one of the bases and can be inserted into any one of the three locking holes at one end, and the other is installed on the other base and can be inserted into any one of the three locking holes at the other end.

[0018] In some embodiments, each first limiting mechanism includes:

[0019] A first guide cylinder is installed on the top of the base;

[0020] A first tensioning spring is inserted into the first guide cylinder, with one end facing the handrail;

[0021] The first jacking bead is installed on one end of the first jacking spring facing the handrail and can abut against any limiting groove.

[0022] In some embodiments, each locking mechanism comprises:

[0023] The latch can be slidably installed in the middle of the base along its own axis, with one end facing the armrest and can be inserted into any locking hole;

[0024] A return spring is sleeved on the latch;

[0025] The cam has a middle portion that is rotatably connected to an end of the latch away from the armrest through a first rotating shaft, and two side surfaces that are slidably connected to the base through the first rotating shaft; the rotating cam can drive the latch to disengage from the locking hole.

[0026] In some of these embodiments, each locking mechanism further comprises:

[0027] Operating handle, mounted on the cam.

[0028] In some embodiments, it also includes:

[0029] There are two second limiting mechanisms, one of which is installed on one of the bases, and the other is installed on the other base; when the armrest is in a folded state, the two second limiting mechanisms can press against the armrest.

[0030] In some embodiments, each second limiting mechanism includes:

[0031] A second guide cylinder is installed on the top of the base;

[0032] A second tensioning spring is inserted into the second guide tube, with one end facing the handrail;

[0033] The second jacking bead is installed on one end of the second jacking spring facing the armrest, and can be pressed against the side where the armrest and the base form an angle.

[0034] In some embodiments, the armrest comprises:

[0035] The grip rod has connecting sections at opposite ends, and the connecting sections at both ends are rotatably connected to the bases at the corresponding ends.

[0036] There are two handles, which are respectively installed on the mutually away sides of the two connecting sections.

[0037] The beneficial effects of the present invention are as follows: the foldable and deployable handrail that is easily installed outside the space station cabin of the present invention is in a folded state during launch by setting a base, a handrail, a first limiting mechanism and a locking mechanism, and can be freely switched between the folded state and the deployed state after entering orbit. Compared with the traditional fixed handrail, it occupies less space during launch, and the possibility of interfering with the layout of other equipment is extremely small, which reduces the difficulty and risk of launch. Because the form can be converted, it has high flexibility in use and can cope with different mission requirements and usage scenarios. Compared with the traditional on-orbit detachable handrail, the on-orbit installation process is avoided, thereby avoiding the interference of the on-orbit installation with the normal operation of other equipment, reducing the difficulty of installation and saving installation time. Compared with the traditional ground handrail, during the launch phase, when subjected to large centrifugal force, impact and vibration, it can always remain in a folded state, with high safety and reliability, and will not easily deform or damage. After entering orbit and unfolding, it can withstand the extreme loads applied by more than two astronauts when operating in the same time period. It is adapted to extreme high and low temperatures, atomic oxygen corrosion, ultraviolet radiation, vacuum and other environments in space that are different from the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a foldable and deployable handrail that is easily installed outside a space station cabin in the present invention when it is in a folded state;

[0039] Figure 2 yes Figure 1 A partial enlarged view of the middle A area;

[0040] Figure 3 yes Figure 1 A cross-sectional view of a foldable and deployable handrail that is easily installed outside a space station cabin along a first cross-sectional plane;

[0041] Figure 4 yes Figure 3 A partial enlarged view of the middle B area;

[0042] Figure 5 yes Figure 1 A cross-sectional view of a foldable and deployable handrail that can be easily installed outside a space station cabin along a second cross-sectional plane;

[0043] Figure 6 yes Figure 5 A partial enlarged view of the middle C area;

[0044] Figure 7 It is a structural schematic diagram of a foldable and deployable handrail that is easily installed outside a space station cabin in the present invention when it is in an deployed state;

[0045] Figure 8 yes Figure 7 A cross-sectional view of a foldable and deployable handrail that is easily installed outside a space station cabin along a first cross-sectional plane;

[0046] Fig. 9 yes Figure 8 A partial enlarged view of the D area in the middle;

[0047] Fig.10 yes Figure 8 A cross-sectional view of a foldable and deployable handrail that can be easily installed outside a space station cabin along a second cross-sectional plane;

[0048] Fig.11 yes Fig.10 A partial enlarged view of the middle E area;

[0049] Fig.12 yes Figure 1 A schematic diagram of the structure of the foldable and deployable handrail that is easily installed outside the space station cabin when it is in an unlocked state;

[0050] Fig.13 yes Fig.12 A partial enlarged view of the middle F area;

[0051] Fig.14 yes Fig.12 A cross-sectional view of a foldable and deployable handrail that is easily installed outside a space station cabin along a first cross-sectional plane;

[0052] Fig.15 yes Fig.14 A partial enlarged view of the middle G area;

[0053] Fig.16 yes Fig.12A cross-sectional view of a foldable and deployable handrail that can be easily installed outside a space station cabin along a second cross-sectional plane;

[0054] Fig.17 yes Fig.16 A partial enlarged view of the middle H area.

[0055] In the accompanying drawings, 110, base; 111, guide side plate; 120, armrest; 121, grip rod; 1211, connecting section; 12111, locking hole; 122, handle; 130, first limiting mechanism; 131, first guide cylinder; 132, first tightening spring; 133, first jacking ball; 140, locking mechanism; 141, latch; 142, return spring; 143, cam; 144, first rotating shaft; 145, operating handle; 150, second rotating shaft; 160, second limiting mechanism; 161, second guide cylinder; 162, second tightening spring; 163, second jacking ball. DETAILED DESCRIPTION

[0056] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] As mentioned in the background technology, the handrails used in the space station are mainly divided into two types: fixed handrails and on-orbit detachable handrails. For fixed handrails, they need to be installed on the outer wall of the space station cabin on the ground before launch. During the launch phase, they occupy a large space, which increases the difficulty and risk of launch. For on-orbit detachable handrails, astronauts are required to disassemble and install the handrails on-orbit. The on-orbit installation process is relatively complicated, time-consuming and labor-intensive. Therefore, how to make the handrails foldable before launch and unfoldable after entering orbit has become a technical problem that needs to be solved urgently by technical personnel in this field.

[0058] To solve the above problems, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 and Fig.17The present invention provides a foldable and deployable armrest that is easily installed outside a space station cabin, comprising a base 110, an armrest 120, a first limiting mechanism 130 and a locking mechanism 140. The base 110 is fixed to the outer wall of the cabin of the space station by screws. The armrest 120 is rotatably mounted on the base 110 by a second rotating shaft 150. More than two limiting grooves and more than two locking holes 12111 are provided on the armrest 120. The first limiting mechanism 130 is mounted on the base 110 and can be inserted into any limiting groove or detached from each limiting groove. The locking mechanism 140 is mounted on the base 110 and can be inserted into any locking hole 12111 or detached from each locking hole 12111. Assume that the angle between the armrest 120 and the base 110 is between 120° and 180°. When the armrest 120 is in a folded state, the angle between the armrest 120 and the base 110 is 120°. When the armrest 120 is in the unfolded state, the angle between the armrest 120 and the base 110 is 180°. Before launching, the foldable and unfoldable armrest that is easily installed outside the space station cabin is changed from the unfolded state to the folded state. During this process, the locking mechanism 140 is first disengaged from one of the locking holes 12111, so that the foldable and unfoldable armrest that is easily installed outside the space station cabin is in the unlocked state. Then the armrest 120 is rotated, the first limiting mechanism 130 gradually disengages from one of the limiting grooves, the angle between the armrest 120 and the base 110 is gradually reduced from 180° to 120°, the first limiting mechanism 130 is gradually inserted into another limiting groove, and the locking mechanism 140 is inserted into another locking hole 12111, so that the foldable and unfoldable armrest that is easily installed outside the space station cabin is in the locked state. During launching, the foldable and unfoldable armrest that is easily installed outside the space station cabin is in the folded state. After entering orbit, the foldable and expandable armrest that is easily installed outside the space station cabin changes from a folded state to an expanded state. During this process, the locking mechanism 140 is first disengaged from one of the locking holes 12111, so that the foldable and expandable armrest that is easily installed outside the space station cabin is in an unlocked state. Then the armrest 120 is rotated, the first limiting mechanism 130 gradually disengages from one of the limiting grooves, the angle between the armrest 120 and the base 110 gradually increases from 120° to 180°, and the first limiting mechanism 130 gradually inserts into another limiting groove. The locking mechanism 140 is then inserted into another locking hole 12111, so that the foldable and expandable armrest that is easily installed outside the space station cabin is in a locked state, thereby restricting the armrest 120 from continuing to rotate. Overall, during launch, the foldable and expandable armrest that is easily installed outside the space station cabin is in a folded state. After entering orbit, the foldable and expandable armrest that is easily installed outside the space station cabin can be freely converted between the folded state and the expanded state. Compared with traditional fixed armrests, it takes up less space during launch and is less likely to interfere with the layout of other equipment, reducing the difficulty and risk of launch. Because the form can be transformed, it is highly flexible and can meet different mission requirements and usage scenarios.Compared with the traditional on-orbit detachable handrails, it avoids the on-orbit installation process, thereby avoiding the interference of on-orbit installation on the normal operation of other equipment, reducing the difficulty of installation and saving installation time. Compared with the traditional ground handrails, during the launch phase, when subjected to large centrifugal forces, impacts and vibrations, it can always remain in a folded state, with high safety and reliability, and will not easily deform or damage. After being deployed in orbit, it can withstand the extreme loads applied by more than two astronauts in suits during operation in the same period of time. It is adapted to the extreme high and low temperatures, atomic oxygen corrosion, ultraviolet radiation, vacuum and other environments in space that are different from the ground.

[0059] Specifically, in the exemplary embodiment, the armrest 120 includes a grip bar 121 and two grip handles 122. The grip bar 121 and the two grip handles 122 meet the diverse gripping needs of astronauts. A connecting section 1211 is provided at each of the opposite ends of the grip bar 121. The connecting sections 1211 at both ends are rotatably connected to the base 110 at the corresponding ends through the second rotating shaft 150. The two grip handles 122 are respectively installed on the mutually opposite sides of the two connecting sections 1211.

[0060] In some embodiments, there are two bases 110, and a fixing ear piece is respectively provided at the bottom. The fixing ear piece is fixed to the outer wall of the space station by screws to increase the contact area when the base 110 is connected to the outer wall of the cabin, thereby improving the stability of the connection. One of the connecting sections 1211 is rotatably connected to one of the bases 110 through the second rotating shaft 150, and the other connecting section 1211 is rotatably connected to the other base 110 through the second rotating shaft 150. Two limiting grooves and two locking holes 12111 are provided on each connecting section 1211. There are two first limiting mechanisms 130, one of which is installed on one of the bases 110 and can be inserted into any one of the two limiting grooves at one end, and the other is installed on the other base 110 and can be inserted into any one of the two limiting grooves at the other end. There are two locking mechanisms 140, one of which is installed on one of the bases 110 and can be inserted into any one of the two locking holes 12111 at one end, and the other is installed on the other base 110 and can be inserted into any one of the two locking holes 12111 at the other end. The armrest 120 can only rotate when the locking mechanisms 140 at both ends are respectively disengaged from the locking holes 12111 at the corresponding ends, thereby avoiding astronauts' misoperation. Overall, the foldable and deployable armrest that is easily installed outside the space station cabin can realize the free conversion between the unfolding and folding modes.

[0061] In other embodiments, there are two bases 110, and a fixing ear piece is provided at the bottom. The fixing ear piece is fixed to the outer wall of the space station by screws to increase the contact area when the base 110 is connected to the outer wall of the cabin, thereby improving the stability of the connection. One of the connecting sections 1211 is rotatably connected to one of the bases 110 through the second rotating shaft 150, and the other connecting section 1211 is rotatably connected to the other base 110 through the second rotating shaft 150. Three limiting grooves and three locking holes 12111 are provided on each connecting section 1211. There are two first limiting mechanisms 130, one of which is installed on one of the bases 110 and can be inserted into any one of the three limiting grooves at one end, and the other is installed on the other base 110 and can be inserted into any one of the three limiting grooves at the other end. There are two locking mechanisms 140, one of which is installed on one of the bases 110 and can be inserted into any one of the three locking holes 12111 at one end, and the other is installed on the other base 110 and can be inserted into any one of the three locking holes 12111 at the other end. The armrest 120 can only rotate when the locking mechanisms 140 at both ends are respectively disengaged from the locking holes 12111 at the corresponding ends. Overall, the foldable and deployable armrest that is easily installed outside the space station cabin can realize free conversion between three modes: fully deployed, semi-deployed and folded.

[0062] Preferably, the edges of the grip bar 121 and each grip handle 122 are chamfered to prevent the handrail 120 from damaging the space suit. The grip bar 121 and the grip handle 122 can meet the requirements of the astronaut wearing gloves and holding the space suit.

[0063] Preferably, the two locking mechanisms 140 can be respectively installed on the opposite sides of the two bases 110 to reduce the space occupied by the entire device. The two locking mechanisms 140 can also be respectively installed on the opposite sides of the two bases 110 to facilitate astronaut operation.

[0064] Specifically, in the example, Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.12 , Fig.14 and Fig.15As shown, each first limiting mechanism 130 includes a first guide cylinder 131, a first tensioning spring 132, a first push bead 133 and a first pressure cover. The first guide cylinder 131 is installed on the top of the base 110, with one end facing the connecting section 1211 of the gripping rod 121 of the handrail 120. The first tensioning spring 132 is inserted into the first guide cylinder 131, with one end facing the connecting section 1211 of the gripping rod 121 of the handrail 120. The first push bead 133 is installed at one end of the first tensioning spring 132 facing the handrail 120, and can be abutted in any limiting groove. The first pressure cover is installed at one end of the first guide cylinder 131 away from the connecting section 1211 of the gripping rod 121. When the foldable and deployable armrest that can be easily installed outside the space station cabin is in the unlocked state, the connecting section 1211 of the grip rod 121 of the armrest 120 is driven by manpower to rotate relative to the base 110, and the first push bead 133 can be pressed into any limit groove by the push force of the first push spring 132, thereby preliminarily limiting the rotation of the armrest 120. It is ensured that in a zero-gravity environment, the armrest 120 can be accurately positioned and provide vibration feedback after being in place.

[0065] Specifically, in the example, Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.14 , Fig.15 , Fig.16 and Fig.17As shown, each locking mechanism 140 includes a latch 141, a return spring 142, a cam 143, a first rotating shaft 144 and an operating handle 145. The latch 141 can be slidably installed in the middle of the base 110 along its own axial direction, with one end facing the connecting section 1211 of the grip 121 of the armrest 120. The latch 141 can be inserted into any one of the two locking holes 12111. The return spring 142 is sleeved on the latch 141. The middle part of the cam 143 is rotatably connected to the end of the latch 141 away from the armrest 120 through the first rotating shaft 144, and the two side surfaces are slidably connected to the two guide side plates 111 of the base 110 through the first rotating shaft 144. The rotating cam 143 can drive the latch 141 to disengage from the locking hole 12111. The operating handle 145 is installed on the cam 143. With the help of manpower, the operating handle 145 can be rotated, thereby driving the cam 143 to rotate, thereby pulling the latch 141 out of the locking hole 12111, so that the foldable and deployable armrest that is easily installed outside the space station cabin is in an unlocked state. When the foldable and deployable armrest that is easily installed outside the space station cabin is converted from a folded state to an unfolded state or from an unfolded state to a folded state, the operating handle 145 is slightly turned, and the force of the return spring 142 to restore the deformation drives the latch 141 to be reinserted into one of the locking holes 12111, so that the foldable and deployable armrest that is easily installed outside the space station cabin is converted from an unlocked state to a locked state, thereby performing a secondary restriction on the rotation of the armrest 120. When the foldable and deployable armrest that is easily installed outside the space station cabin is in a folded state or in an deployed state and the latch 141 is inserted into the locking hole 12111, the return spring 142 ensures that the latch will not be disengaged from the locking hole 12111 without reason to maintain the locked state, so that the armrest 120 can withstand the extreme load applied by the astronauts when operating the suit without moving, thereby providing stable supporting force.

[0066] Preferably, the operating handle 145 is overall "L"-shaped and is provided with weight-reducing holes to achieve a lightweight design.

[0067] Preferably, the grip rod 121 is a hollow structure with a wall thickness of 1 mm, which is conducive to lightweight design.

[0068] Specifically, in the exemplary embodiment, the foldable and deployable armrest that is easily installed outside the space station cabin also includes two second limiting mechanisms 160. One of the second limiting mechanisms 160 is installed on one of the bases 110, and the other second limiting mechanism 160 is installed on the other base 110. When the foldable and deployable armrest that is easily installed outside the space station cabin is in a folded state, the two second limiting mechanisms 160 can respectively press against the connecting section 1211 of the grip rod 121 of the armrest 120. The two second limiting mechanisms 160, the two first limiting mechanisms 130 and the two locking mechanisms 140 cooperate, and even if the armrest 120 is subjected to large centrifugal force and vibration during the launch process, the armrest 120 will not shake up and down, and the foldable and deployable armrest that is easily installed outside the space station cabin always remains in a folded state.

[0069] Specifically, in the example, Figure 1 , Figure 5 , Figure 6 As shown, each second limiting mechanism 160 includes a second guide cylinder 161, a second tensioning spring 162, a second lift bead 163 and a second pressure cover. The second guide cylinder 161 is vertically installed on the top of the base 110. The second tensioning spring 162 is vertically inserted into the second guide cylinder 161, with one end facing the connecting section 1211 of the gripping rod 121 of the handrail 120. The second lift bead 163 is installed on the end of the second tensioning spring 162 facing the handrail 120, and can be pressed against the side where the connecting section 1211 of the gripping rod 121 of the handrail 120 forms an angle with the base 110. When the foldable and unfoldable handrail that is easily installed outside the space station cabin is in a folded state, the second lift bead 163 of the second limiting mechanism 160 is respectively pressed against the side where the connecting section 1211 of the gripping rod 121 of the handrail 120 forms an angle with the base 110 to limit the handrail 120 from shaking up and down.

[0070] It should be pointed out that the base 110, the armrest 120, and the locking mechanism 140 can be made of different materials, the base 110, the armrest 120, and the first limiting mechanism 130 can be made of different materials, and the base 110, the armrest 120, and the second limiting mechanism 160 can be made of different materials to prevent vacuum cold welding. Alternatively, although the base 110, the armrest 120, and the locking mechanism 140 are made of the same material, a lubricating layer is coated between them. Although the base 110, the armrest 120, and the first limiting mechanism 130 are made of the same material, a lubricating layer is coated between them. Although the base 110, the armrest 120, and the second limiting mechanism 160 are made of the same material, a lubricating layer is coated between them. In this way, vacuum cold welding can also be prevented.

[0071] It should be noted that in extreme environments, materials will expand and contract with heat. Since the thermal expansion coefficients of different materials are different, in order to prevent the foldable and expandable armrest that is easily installed outside the space station cabin from getting stuck during movement, the connecting section 1211 is installed between the two side panels of the base 110, and gaps are reserved between the two opposite sides of the connecting section 1211 and the two side panels of the base 110, respectively. The gap should be larger than the deformation amount of the connecting section 1211 during thermal expansion and contraction. At the same time, the materials used for the components of the locking mechanism 140, the materials used for the components of the first limiting mechanism 130, and the materials used for the components of the second limiting mechanism 160 are the same, so as to ensure that the deformation amount of the components of the locking mechanism 140 is the same, the deformation amount of the components of the first limiting mechanism 130 is the same, and the deformation amount of the components of the second limiting mechanism 160 is the same, so as to prevent the movement gap from changing, thereby ensuring that the foldable and expandable armrest that is easily installed outside the space station cabin has good high and low temperature adaptive ability.

[0072] The installation and use process of the foldable and expandable handrail that is easily installed outside the space station cabin is as follows: install the foldable and expandable handrail that is easily installed outside the space station cabin on the outer wall of the cabin on the ground. Before launch, ensure that the foldable and expandable handrail that is easily installed outside the space station cabin is in a folded state to cope with the centrifugal force, impact and vibration caused by the launch. After entering orbit, the astronaut operates one of the locking mechanisms 140 to unlock one side, and then the astronaut crawls along the handrail 120 to the other side of the handrail 120 to operate the other locking mechanism 140 to achieve double-sided unlocking. It should be noted that when the unilateral locking mechanism 140 is in the unlocked state, the handrail 120 can still withstand the large force applied by the astronaut. When the locking mechanisms 140 on both sides are in the unlocked state, the astronaut grasps the connecting section 1211 on either side with one hand, so that the connecting section 1211 rotates relative to the base 110, thereby converting the foldable and expandable handrail that is easily installed outside the space station cabin from the folded state to the unfolded state. Next, the astronaut operates one of the locking mechanisms 140 to perform unilateral locking, and then the astronaut crawls along the armrest 120 to the other side of the armrest 120 to operate the other locking mechanism 140 to achieve bilateral locking.

[0073] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention 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 limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A foldable and deployable handrail that can be easily installed outside a space station cabin, characterized in that: include: Base; An armrest is rotatably mounted on the base; the armrest is provided with more than two limit slots and more than two locking holes; A first limiting mechanism, mounted on the base, capable of being inserted into any of the limiting grooves; The locking mechanism is installed on the base and can be inserted into any of the locking holes.

2. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 1 is characterized in that: There are two bases; One end of the armrest is rotatably connected to one of the bases, and the other end is rotatably connected to the other base; two limiting grooves and two locking holes are provided at both ends of the armrest; There are two first limiting mechanisms, one of which is installed on one of the bases and can be inserted into any one of the two limiting grooves at one end, and the other is installed on the other base and can be inserted into any one of the two limiting grooves at the other end; There are two locking mechanisms, one of which is installed on one of the bases and can be inserted into any one of the two locking holes at one end, and the other is installed on the other base and can be inserted into any one of the two locking holes at the other end.

3. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 1 is characterized in that: There are two bases; One end of the armrest is rotatably connected to one of the bases, and the other end is rotatably connected to the other base; three limiting grooves and three locking holes are provided at both ends of the armrest; There are two first limiting mechanisms, one of which is installed on one of the bases and can be inserted into any one of the three limiting grooves at one end, and the other is installed on the other base and can be inserted into any one of the three limiting grooves at the other end; There are two locking mechanisms, one of which is installed on one of the bases and can be inserted into any one of the three locking holes at one end, and the other is installed on the other base and can be inserted into any one of the three locking holes at the other end.

4. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 2 or 3, characterized in that: Each of the first limiting mechanisms comprises: A first guide cylinder is installed on the top of the base; A first tensioning spring, which is inserted into the first guide cylinder and has one end facing the handrail; A first jacking bead is installed on one end of the first jacking spring facing the handrail and can abut against any of the limiting grooves.

5. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 2 or 3, characterized in that: Each of the locking mechanisms comprises: A latch, which can be slidably installed in the middle of the base along its own axial direction, with one end facing the armrest and can be inserted into any of the locking holes; A return spring, sleeved on the latch; The cam has a middle portion that is rotatably connected to an end of the latch away from the armrest through a first rotating shaft, and two side surfaces that are slidably connected to the base through the first rotating shaft; the rotating cam can drive the latch to disengage from the locking hole.

6. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 5 is characterized in that: Each of the locking mechanisms further comprises: An operating handle is mounted on the cam.

7. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 2 or 3, characterized in that: Also includes: There are two second limiting mechanisms, one of which is installed on one of the bases, and the other is installed on the other base; when the armrest is in a folded state, the two second limiting mechanisms can press against the armrest.

8. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 7 is characterized in that: Each of the second limiting mechanisms comprises: A second guide cylinder is installed on the top of the base; A second tensioning spring is inserted into the second guide cylinder, with one end facing the handrail; The second jacking bead is installed on one end of the second jacking spring facing the armrest, and can be pressed against a side of the armrest and the base forming an angle.

9. The foldable and deployable handrail that can be easily installed outside a space station cabin according to claim 2 or 3, characterized in that: The armrest comprises: The grip rod has connecting sections at two opposite ends; the connecting sections at the two ends are rotatably connected to the base at the corresponding ends; There are two handles, which are respectively installed on the mutually away sides of the two connecting sections.

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