KR102479846B1 - Reflecting plates expanding velocity control apparatus and satellite antenna having the same - Google Patents

Abstract

The present invention relates to a reflector deployment speed control device for controlling the deployment speed of a plurality of reflectors provided in a satellite antenna. The reflector deployment speed control device comprises: a rotator installed to be rotatable around the center of the reflecting plates; a plurality of wires connected between the rotator and the reflective plates to adjust the speed at which each of the reflective plates is deployed by the rotation of the rotator; and a switching unit disposed between the rotator and the reflectors to switch the moving direction of a wire from the rotation direction of the rotator to the deployment direction of the reflectors. Therefore, a plurality of reflectors can be stably developed.

Description

Reflector expansion speed control device and satellite antenna having the same

The present invention relates to a device for controlling the deployment speed of a reflector and a satellite antenna having the same, and more particularly, to a device for controlling the deployment speed of a reflector capable of stably deploying a plurality of reflectors and a satellite antenna having the same.

In general, an antenna is a wireless communication device for transmitting radio waves to the outside or receiving radio waves from the outside. In the case of a large antenna, a dish-shaped reflector forming a curved surface is provided to stably receive external radio waves.

At this time, the antenna used in space is launched into space while being mounted on a satellite launch vehicle. Since the mounting space of the satellite launch vehicle is limited, the reflectors of the antenna are folded and mounted on the satellite launch vehicle, and the reflectors of the antenna are deployed in space.

However, when expanding the reflected waves of the antenna, it is difficult to constantly adjust the speed at which the reflected waves are spread. Therefore, there is a problem in that a difference occurs in the speed at which each of the reflectors is deployed, and a load is applied to the antenna and a failure occurs.

KR 10-1769135 B

The present invention provides a reflector deployment speed control device capable of stably deploying a plurality of reflectors and a satellite antenna having the same.

The present invention provides a reflector deployment speed control device capable of reducing a load generated while the reflectors are deployed, and a satellite antenna having the same.

The present invention is a reflector expansion speed control device for controlling the unfolding speed of a plurality of reflectors provided in a satellite antenna, comprising: a rotating part rotatably installed around the center of the reflectors; a plurality of wires connected between the rotator and the reflective plates to adjust the speed at which each of the reflective plates is deployed by the rotation of the rotator; and a switching unit disposed between the rotation unit and the reflection plates to change a moving direction of the wire from a rotation direction of the rotation unit to a deployment direction of the reflection plates.

The rotating unit may include a rotating member to which the wires are connected so that the wires are wound or unwound according to the direction of rotation; and a rotary actuator installed to rotate the rotary member.

The rotating member may include a first rotating plate; a second rotating plate spaced apart from the first rotating plate; and a plurality of connection pins installed between the first rotation plate and the second rotation plate and disposed along the circumferences of the first rotation plate and the second rotation plate so that the wires are connected to each other.

The rotary actuator includes a mainspring installed to rotate the rotary member in a direction in which the wires are unwound when the reflectors are deployed.

The rotating unit further includes a handle member detachably connected to the rotating member to rotate the rotating member in a direction in which the wires are wound so that the mainspring spring accumulates elastic energy.

The switching unit may include a body member formed to surround a circumference of the rotating unit; and a plurality of switching members disposed on the path along which each of the wires moves and installed on the body member.

The switching member may include a first roller installed on the body member to be rotatable in the rotational direction of the rotating unit; and a second roller rotatably installed on the body member in a direction in which the reflector is deployed and spaced apart from the first roller in an extension direction of the wire.

The body member may include a first body in which an opening is formed so that the rotation unit is disposed at a center portion and a first roller of the switching members is installed; a connecting body connecting the rotating part and the first body inside the opening; and a plurality of second bodies installed to protrude outward from the first body and disposed along the circumference of the first body so that the second rollers of the switching members are respectively installed.

The second body supports the second roller to be located at a lower height than the first roller.

The present invention includes a plurality of reflectors; a reflector plate deployment device rotatably supporting one end of the reflector plates so that the reflector plates can be deployed; a support connected to the center of the reflector spreading device; and any one of claims 1 to 9, wherein the reflector deployment speed control device is installed on the support to face the reflector deployment device and is connected to the other ends of the reflectors so as to adjust the speed at which the reflector deployment device deploys the reflectors; includes

The reflector plate deployment device, the base; and a plurality of deployment members connected to each of the reflection plates to press the reflection plates in a direction in which they are deployed, and disposed along the circumference of the base.

The apparatus for controlling the deployment speed of the reflector further includes a restraining part spaced apart from the switching part and supported on the support so as to detachably restrain the other ends of the reflecting plates.

According to embodiments of the present invention, the speed at which each of the plurality of reflectors is deployed may be controlled to be constant. Thus, the reflectors can be stably deployed. Therefore, it is possible to suppress or prevent a load applied to the satellite antenna due to a difference in the speed at which each of the reflectors are deployed.

1 is a diagram illustrating a structure in which reflectors of a satellite antenna according to an embodiment of the present invention are deployed.
2 is a perspective view showing the structure of a rotation unit and a switching unit according to an embodiment of the present invention.
3 is a partial perspective view showing the structure of a rotation unit and a switching unit according to an embodiment of the present invention.
4 is a perspective view showing the operation structure of a rotating part, a switching part, and a restraining part according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments will complete the disclosure of the present invention, and will fully cover the scope of the invention to those skilled in the art. It is provided to inform you. In order to describe the invention in detail, the drawings may be exaggerated, and like reference numerals refer to like elements in the drawings.

1 is a diagram illustrating a structure in which reflectors of a satellite antenna according to an embodiment of the present invention are deployed. In the following, a satellite antenna according to an embodiment of the present invention will be described. The satellite antenna may be an antenna mounted on a satellite and operated in space. Referring to FIG. 1 , a satellite antenna 1000 includes a plurality of supports 300 , a reflector 100 , a reflector deployment device 200 , and a reflector deployment speed control device 400 .

The support 300 may extend in the longitudinal direction. One end of the support 300 may be connected to the central portion of the reflector spreading device 200, and a reflector spreading speed control device 400 may be installed and supported at the other end of the support 300. Accordingly, the reflector deployment device 200 and the reflector deployment speed control device 400 may be spaced apart from each other in the longitudinal direction by the support 300 . One support 300 may be provided, or a plurality may be provided and disposed along the circumference of the center of the reflector plate spreading device 200 .

A plurality of reflectors 100 may be provided. The reflectors 100 may be disposed along the circumference of the support 300 . For example, when a feeder (not shown) capable of transmitting and receiving communication information with a satellite terminal on the ground is provided on the support 300, the reflectors 100 are arranged in a dish shape to reflect radio waves from the satellite terminal on the ground. It can be transmitted to the feeder, or reflected radio waves from the feeder and transmitted to the satellite terminal on the ground. In addition, one end of the reflectors 100 may be rotatably supported by the reflector plate spreading device 200 . Accordingly, when the reflectors 100 are rotated toward the support 300 with one end as the center, the reflectors 100 are folded to reduce the volume of the satellite antenna 1000, and the reflector 100 moves toward the support 300 with one end as the center. If the reflectors 100 are rotated and moved toward the outside, an area for reflecting radio waves may be increased while the reflectors 100 are unfolded. Accordingly, when the satellite antenna 1000 is mounted on a satellite launch vehicle, the reflectors 100 can be folded to reduce their volume and can be deployed to operate the satellite antenna 1000 in space.

The reflector plate deployment device 200 rotatably supports one end of the reflectors 100 so that the reflectors 100 can be deployed. The reflector plate spreading device 200 includes a base 210 and a plurality of spreading members 220 .

The base 210 may be formed in a circular plate shape. The support 300 may be installed in the center of the base 210, and the deployment members 220 may be installed in the outer portion surrounding the center. Accordingly, the reflectors 100 connected to each of the deployment members 220 may be radially arranged around the support 300 . However, the structure and shape of the base 210 is not limited thereto and may vary.

A plurality of deployment members 220 may be provided and disposed along the circumference of the base 210 on the base 210 . Each of the unfolding members 220 may be connected to one end of each of the reflectors 100 to press the reflectors 100 in the unfolding direction. For example, the deployment member 220 is rotatably installed with a support body having a pair of protrusions spaced apart from each other, a rotation bar rotatably installed between the protrusions of the support body, and a rotation bar, and a reflector ( 100), and an elastic body for applying force to rotate the rotating bar outwardly of the support 300. Therefore, when the other ends of the reflectors 100 are restrained, the reflectors 100 maintain a folded state as shown in (a) of FIG. Likewise, the reflectors 100 may be deployed while being rotated and moved by the deployment member 220 . However, the structure of the deployment member 220 is not limited thereto and may vary.

The reflector deployment speed controller 400 is installed on the support 300 to face the reflector deployment device 200 . The reflector expansion speed controller 400 is connected to the other ends of the reflectors 100 . When the other end of the reflector 100 rotates around one end, the reflector expansion speed controller 400 may adjust the speed at which the reflector spreader 200 unfolds the reflectors 100 . Accordingly, since the speed at which each of the plurality of reflectors is deployed can be controlled to be constant, the reflectors 100 can be stably and simultaneously deployed. Therefore, it is possible to suppress or prevent a load applied to the satellite antenna 1000 due to a difference in the speed at which each of the reflectors 100 is deployed.

Figure 2 is a perspective view showing the structure of the rotation unit and the switching unit according to an embodiment of the present invention, Figure 3 is a partial perspective view showing the structure of the rotation unit and the switching unit according to an embodiment of the present invention, Figure 4 is an embodiment of the present invention It is a perspective view showing the operation structure of the rotating part, the switching part, and the restraining part according to the above. Hereinafter, the structure of the reflector deployment speed control device according to an embodiment of the present invention will be described in detail.

The reflector expansion speed control apparatus 400 according to an embodiment of the present invention is a reflector expansion speed control apparatus for controlling the expansion speed of a plurality of reflectors provided in a satellite antenna. Referring to FIGS. 2 and 3 , the reflector deployment speed controller 400 includes a rotation unit 410 , a plurality of wires 420 , and a switching unit 430 .

The rotation unit 410 is rotatably installed around the center of the reflectors. For example, the rotation unit 410 may be installed to rotate about an axis extending in a direction in which the support of the satellite antenna extends. The rotation unit 410 includes a rotation member 411 and a rotation actuator 412 .

Wires 420 are connected to the rotating member 411 . Accordingly, the wires 420 may be wound or unwound according to the direction of rotation of the rotating member 411 . Accordingly, when the wires 420 are wound around the rotating member 411, the length decreases, and when the wires 420 are unwound from the rotating member 411, the length may increase. The rotating member 411 includes a first rotating plate 411a, a second rotating plate 411b, and a plurality of connecting pins 411c.

The first rotation plate 411a may be formed in a circular plate shape. However, the shape of the first rotating plate 411a is not limited thereto and may vary.

The second rotation plate 411b may be formed in a circular plate shape. The second rotation plate 411b may be spaced apart from the first rotation plate 411a in a direction in which the reflector deployment device and the reflector deployment speed controller 400 are spaced apart. For example, the second rotation plate 411b may be disposed above the first rotation plate 411a and spaced apart from each other in the vertical direction. However, the shape and arrangement of the second rotation plate 411b are not limited thereto and may vary.

The connection pin 411c may extend in a direction in which the first rotation plate 411a and the second rotation plate 411b are separated from each other. The extension length of the connection pin 411c may be equal to or greater than the separation distance between the first rotation plate 411a and the second rotation plate 411b. Accordingly, the connection pin 411c may be installed between the first rotation plate 411a and the second rotation plate 411b to connect the first rotation plate 411a and the second rotation plate 411b. Accordingly, the first rotation plate 411a, the second rotation plate 411b, and the connection pin 411c may rotate together. In addition, a plurality of connection pins 411c may be provided and disposed along the circumferences of the first rotation plate 411a and the second rotation plate 411b. Each of the wires 420 is connected to each of the connection pins 411c, so that the wires 420 can be wound or unwound around the connection pins 411c.

The rotary actuator 412 is installed to rotate the rotary member 411 . For example, the rotary actuator 412 may be installed between the first rotary plate 411a and the second rotary plate 411b, and the connection pins 411c may be arranged to surround the circumference of the rotary actuator 412. . In addition, the rotary actuator 412 may include a main spring. The spring spring may be installed to rotate the rotating member 411 in a direction in which the wires 420 are unwound when the reflectors 100 are deployed.

Meanwhile, the rotation unit 410 may further include a handle member 413. The handle member 413 may be detachably connected to the rotating member. The handle member 413 may accumulate elastic energy of the mainspring by rotating the rotating member 411 in the direction in which the wires 420 are wound. Accordingly, when the reflectors 100 are folded, the handle member 413 is wound around the wire 420 by rotating the rotating member 411 with the handle member 413, and then the handle member 413 is separated from the rotating member 411 and the reflector 100 is removed. When unfolding, the rotating member 411 may be rotated in a direction in which the wires 420 are unwound by using the accumulated elastic energy of the main spring.

The wire 420 may be connected between the rotator 4110 and the reflective plates so as to adjust the speed at which each of the reflective plates is deployed by the rotation of the rotator 410 . A plurality of wires 420 may be provided. One side of the wires 420 may be wound or unwound around the rotating unit 410 and the other side may be connected to the other ends of the reflectors 100 . When the wires 420 are wound, the length decreases and the other ends of the reflectors 100 are pulled and the reflectors 100 are folded. ) can be developed. Since the wires 420 release the reflectors 100 at the same speed and tension by the rotating portion 410, the speed at which each of the reflecting plates 100 is deployed can be adjusted to be constant by the rotation of the rotating portion 410. there is.

The conversion unit 430 is disposed between the rotation unit 410 and the reflectors 100 . The switching unit 430 may switch the moving direction of the wire 420 from the rotating direction of the rotating unit 410 to the unfolding direction of the reflectors 100 . Accordingly, while the wires 420 are wound or unwound around the rotation unit 410 , the reflectors 100 may be folded or unfolded by the wires 420 . The switching unit 430 includes a body member 431 and a plurality of switching members 432 .

The body member 431 is formed to surround the circumference of the rotating part 410 . The body member 431 includes a first body 431a, a connection body 431c, and a second body 431b.

The first body 431a may be formed in a circular plate shape. An opening may be formed in the center of the first body 431a so that the rotation unit 410 is disposed, and the first roller 432a provided on the switching members 432 runs around the body of the first body 431a. can be installed according to For example, first rollers 432a may be installed along the circumference of the lower surface of the first body 431a. The opening may be formed in a circular shape and may have a larger area than the rotating part 410 . However, the shape and structure of the first body 431a and the opening are not limited thereto and may vary.

The connection body 431c may connect the rotation unit 410 and the first body 431a inside the opening of the first body 431a. A plurality of connecting bodies 431c are provided so that they can be connected by extending from different parts of the first body 431a toward the center, and the rotating part 410 is seated on the part where the connecting bodies 431c are connected to be rotatable. can be conjoined. Accordingly, the connecting bodies 431c may support the rotating unit 410 while locating the rotating unit 410 in the center of the first body 431a. However, the structure and shape of the connector 431c is not limited thereto and may vary.

The second body 431b is installed to protrude outward from the first body 431a. A plurality of second bodies 431b may be provided and disposed along the circumference of the first body 431a so that the second rollers 432b provided on the switching members 432 are respectively installed. For example, second rollers 432b may be installed on each lower surface of the second body 431b. Accordingly, the first rollers 432a supported by the first body 431a may be positioned closer to the rotation unit 410 than the second rollers 432b supported by the second body 431b, and the rotation unit 410 ) The wire 420 connected to may be connected to the reflector 100 via the first roller 432a and the second roller 432b sequentially. Also, the second body 431b may support the second roller 432b to be located at a lower height than the first roller 432a. Accordingly, when the reflector 100 is deployed, the wire 420 can easily move downward along the reflector 100 via the first roller 432a and the second roller 432b. However, the structure of the second body 431b is not limited thereto and may vary.

Meanwhile, the body member 431 may further include a protective body 431d. A plurality of protective bodies 431d may be provided and installed on each of the second bodies 431b. The protective body 431d may be formed to cover at least a portion of the second roller 432b supported by the second body 431b. Accordingly, since the protector 431d can protect the second roller 432b from the outside, the second roller 432b can operate stably.

A plurality of switching members 432 are provided. The switching member 432 may be disposed on a path along which each of the wires 420 moves and installed on the body member 431 . Accordingly, the moving direction of each of the wires 420 may be switched via each of the switching members 432 . The conversion member 432 includes a first roller 432a and a second roller 432b.

The first roller 432a may be installed on the body member 431 to be rotatable in the direction of rotation of the rotating part 410 . In detail, first rollers 432a may be rotatably installed along the circumference of the first body 431a of the body member 431 . The wire 420 may be guided from the rotation unit 410 to the second roller 432b via the first roller 432a. Therefore, when the wire 420 is unwound from the rotating part 410, the length increases while moving toward the second roller 432b by the first roller 432a, and when the wire 420 is wound around the rotating part 410, the length increases. While decreasing, it may move from the second roller 432b to the first roller 432a. In addition, a groove may be formed in the center of the circumference of the first roller 432a. Accordingly, it is possible to prevent the wire 420 from suppressing or leaving the first roller 432a via the groove of the first roller 432a. However, the structure and shape of the first roller 432a are not limited thereto and may vary.

The second roller 432b may be rotatably installed on the body member 431 in the direction in which the reflector 100 is deployed. In detail, second rollers 432b may be rotatably installed on each of the second bodies 431b of the body member 431 . The wire 420 may be guided from the first roller 432a to the other end of the reflector 100 via the second roller 432b. Therefore, when the wire 420 is unwound from the rotating unit 410, the length increases while moving toward the reflector 100 by the second roller 432b, and when the wire 420 is wound around the rotating unit 410, the length decreases. It may move from the reflector 100 to the second roller 432b side. Since the second roller 432b is supported by the second body 431b, the second roller 432b may be spaced apart from the first roller 432a in the extension direction of the wire 420. In addition, a groove may be formed in the center of the circumference of the second roller 432b. Accordingly, it is possible to prevent the wire 420 from suppressing or leaving the second roller 432b via the groove of the second roller 432b.

Meanwhile, the reflector deployment speed controller may further include a restraining unit 440 as shown in FIG. 4 . The restraining unit 440 may be supported on the support 300 while being spaced apart from the switching unit 430 so as to detachably restrain the other ends of the reflectors 100 . For example, a restraining unit 440 may be installed below the switching unit 430 . The restraining part 440 may include a frame 441 and a restraining member 442 .

At this time, the protrusion 150 may be provided at the other end of the reflector 100 . The protruding portion 150 may protrude from the surface of the main body of the reflecting plate 100 toward the restraining portion 440 . A ring 155 may be provided at an end of the protrusion 150 , and each of the wires 420 may be coupled to the ring 155 provided on each of the reflectors 100 .

The frame 441 may be formed in a circular plate shape. A central portion of the frame 441 may be open. However, the structure and shape of the frame 441 is not limited thereto and may vary.

The restraining member 442 may be formed in a circular plate shape. A central portion of the restraining member 442 may be opened. The restraining member 442 may be rotatably installed on the frame 441 . The restraining member 442 may include a plurality of engaging members 442a capable of engaging each of the protrusions 150 of the reflectors 100 . Accordingly, when the restraining member 442 rotates in one direction, the protruding parts 150 are caught and restrained by each of the engaging members 442a, and when the restraining member 442 rotates in the other direction, the engaging members 442a engage the protruding part 150. The protruding portions 150 may be separated from the restraining portion 440 by releasing them. Accordingly, when the protruding parts 150 are constrained by the restraining part 440 , they maintain a folded state, and when the protruding parts 150 are separated from the restraining part 440 , they can be unfolded.

The operation of the reflector deployment speed controller 400 will be described with reference to FIGS. 1 to 4 . When the satellite antenna 1000 is to be mounted on a satellite launcher, the handle member 413 is connected to the rotating member 411, and the rotating member 411 is rotated in the direction in which the wires 420 are wound using the rotating member 411. can be rotated. When the rotating member 411 rotates, the wires 420 are wound, the wires 420 pull the reflectors 100, the reflectors 100 are folded, and the springs accumulate elastic energy. When the protrusions 150 of the reflectors 100 come into contact with the restricting portion 440, the protruding portions 150 may be constrained with the restricting member 442 to fix the reflectors 100, and the reflectors 100 will maintain a folded state. can The handle member 413 is separated from the rotating member 411, and the satellite antenna 1000 in a reduced volume state by folding the reflectors 100 can be easily mounted on the satellite launch vehicle. Then, the satellite antenna 1000 may be transported into space by launching a satellite launch vehicle into space. In space, the restraining member 442 may act to release the protrusions 150. Accordingly, the reflectors 100 may start to be deployed by the force applied by the reflector plate spreading device 200 to the reflectors 100 . At this time, the mainspring can rotate the rotating member 411 in the direction in which the wires 420 are released. Since the reflector 100 is deployed in a state where the wire 420 supports the reflector 100, the reflector 100 does not rapidly expand, and the reflector 100 can be unfolded according to the unwinding speed of the wire 420. Thus, all of the reflectors 100 can be stably deployed while maintaining a uniform speed.

As such, the speed at which each of the plurality of reflectors 100 is deployed can be controlled to be constant. Thus, the reflectors 100 can be stably deployed. Accordingly, it is possible to suppress or prevent a load applied to the satellite antenna 1000 due to a difference in the speed at which each of the reflectors 100 is deployed.

As described above, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention, and various combinations are also possible between the embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, but should be defined by not only the claims to be described below, but also those equivalent to these claims.

100: reflector 200: reflector plate deployment device
300: support 400: reflector deployment speed control device
410: rotating part 420: wire
430: conversion part 440: restriction part

Claims (12)

A reflector deployment speed control device for controlling the deployment speed of a plurality of reflectors provided in a satellite antenna,
Rotating units rotatably installed around the center of the reflecting plates;
a plurality of wires connected between the rotator and the reflective plates to adjust the speed at which each of the reflective plates is deployed by the rotation of the rotator; and
and a switching unit disposed between the rotation unit and the reflectors to switch a direction in which the wire moves from a rotation direction of the rotation unit to a deployment direction of the reflectors. The method of claim 1,
the rotating part,
a rotating member to which the wires are connected so that the wires are wound or unwound according to the direction of rotation; and
A reflector deployment speed control device comprising a; rotary actuator installed to rotate the rotating member. The method of claim 2,
The rotating member,
a first rotary plate;
a second rotating plate spaced apart from the first rotating plate; and
A reflector expansion speed control device comprising: a plurality of connection pins installed between the first rotation plate and the second rotation plate and disposed along the circumferences of the first rotation plate and the second rotation plate so that the wires are connected to each other. The method of claim 2,
The rotary actuator,
A reflector deployment speed control device comprising a spring installed to rotate the rotating member in a direction in which the wires are unwound when the reflectors are deployed. The method of claim 4,
the rotating part,
and a handle member detachably connected to the rotating member to rotate the rotating member in a direction in which the wires are wound so that the mainspring spring accumulates elastic energy. The method of claim 1,
The conversion part,
a body member formed to surround the circumference of the rotating unit; and
A reflector expansion speed control device comprising: a plurality of switching members disposed on a path along which each of the wires moves and installed on the body member. The method of claim 6,
The conversion member,
a first roller installed on the body member to be rotatable in the direction of rotation of the rotating unit; and
A reflector expansion speed control device including a second roller installed on the body member to be rotatable in the expansion direction of the reflector and spaced apart from the first roller in the extension direction of the wire. The method of claim 7,
The body member,
a first body in which an opening is formed so that the rotating part is disposed at a center thereof, and first rollers of the switching members are installed;
a connecting body connecting the rotating part and the first body inside the opening; and
A reflector expansion speed control device comprising: a plurality of second bodies protruding outward from the first body and disposed along the circumference of the first body so that the second rollers of the switching members are respectively installed. The method of claim 8,
The second body supports the second roller to be positioned at a lower height than the first roller. a plurality of reflectors;
a reflector plate deployment device rotatably supporting one end of the reflector plates so that the reflector plates can be deployed;
a support connected to the center of the reflector spreading device; and
The reflector deployment speed control device according to any one of claims 1 to 9, which is installed on the support to face the reflector deployment device and is connected to the other end of the reflectors so that the reflector deployment device adjusts the speed at which the reflectors are deployed. Including satellite antenna. The method of claim 10,
The reflector deployment device,
Base; and
A satellite antenna comprising: a plurality of deployment members connected to each of the reflection plates to press the reflection plates in a direction in which they are deployed and disposed along the circumference of the base. The method of claim 11,
The apparatus for controlling the deployment speed of the reflector further includes a restraining part spaced apart from the switching part and supported on the support so as to detachably restrain the other ends of the reflecting plates.

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