A rod antenna and a spacecraft

Abstract

The utility model relates to a kind of pole-like antenna and spacecraft, pole-like antenna includes mounting plate, first antenna, second antenna, first unfolding hinge, second unfolding hinge, seat, hot melting mechanism, pre-tightening rod, guide pin and rope, seat is fixed in the middle position of mounting plate one side face, first unfolding hinge and second unfolding hinge are respectively installed in the both ends position of mounting plate one side face;First antenna one end is connected with first unfolding hinge, and second antenna one end is connected with second unfolding hinge;Hot melting mechanism is installed on the top of seat one end, pre-tightening rod is installed on the top of seat other end, guide pin is installed in the middle part of seat and is arranged in parallel with pre-tightening rod, and two containing grooves are equipped on seat;First antenna and second antenna can be respectively folded or unfolded by first unfolding hinge and second unfolding hinge;Rope one end is fixed on guide pin, and rope other end is fixed on pre-tightening rod, and the middle part of rope passes through the containing groove on seat, and the middle part of rope is also adjacent to the heating wire arrangement of hot melting mechanism.

Description

Technical Field

[0001] This utility model relates to the field of spacecraft-related technology, specifically to a rod-shaped antenna and a spacecraft. Background Technology

[0002] Due to limitations in the launch envelope, spacecraft often employ deployable mechanisms for the folding of antennas or other equipment before launch and their deployment after orbit insertion. Because antennas come in various forms and sizes, different deployment mechanisms are required. Traditional large antenna deployment mechanisms require significant pre-tightening force after compression, often employing pyrotechnic clamping, which is not reusable. Furthermore, a single antenna requires a large clamping device simultaneously. For smaller antennas, non-pyrotechnic clamping and release devices are generally used for clamping. Utility Model Content

[0003] This utility model provides a rod-shaped antenna and a spacecraft to solve one or more technical problems existing in the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a rod-shaped antenna, including a mounting plate, a first antenna, a second antenna, a first unfolding hinge, a second unfolding hinge, a base, a heat-fusion mechanism, a pre-tightening rod, a guide pin, and a rope. The base is fixed at the middle position of one side of the mounting plate. The first unfolding hinge and the second unfolding hinge are respectively installed at both ends of one side of the mounting plate. One end of the first antenna is connected to the first unfolding hinge, and one end of the second antenna is connected to the second unfolding hinge. The hot-melting mechanism is installed above one end of the base, the pre-tightening rod is installed above the other end of the base, the guide pin is installed in the middle of the base and arranged parallel to the pre-tightening rod, and the base is provided with two receiving slots for placing the first antenna and the second antenna; the first antenna and the second antenna can be closed or opened respectively through the first unfolding hinge and the second unfolding hinge and placed in the corresponding receiving slot after being closed. One end of the rope is fixed to the guide pin, and the other end of the rope is fixed to the pretensioning rod. The middle part of the rope passes around the receiving groove on the base and is used to press the first antenna and the second antenna into the receiving groove. The middle part of the rope is also arranged near the heating wire of the hot-melt mechanism.

[0005] The beneficial effects of this utility model are as follows: The rod antenna of this utility model, when folded, is folded in opposite directions and fixed to the mounting plate. When the antenna needs to be unfolded, the thermoforming mechanism is powered and melts the clamping rope. Under the force of the torsion spring of the unfolding hinge, the antenna unfolds, locks, and remains in the unfolded state, thus completing the antenna unfolding. This type of antenna unfolding mechanism is simple in form, reliable in unlocking, and reusable, providing unfolding options for small rod antennas. The rod antenna of this utility model achieves the clamping and releasing of the antenna by using the heating wire of the thermoforming mechanism to burn the rope, allowing for repeated use.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the mounting plate has a rectangular structure, the receiving groove is arranged through the length direction parallel to the mounting plate, and the rope is arranged perpendicular to the receiving groove.

[0008] The beneficial effect of adopting the above-mentioned further solution is that the antenna can be limited by setting up a receiving slot.

[0009] Furthermore, the two receiving slots are arranged side by side in parallel.

[0010] Furthermore, both the first and second unfolding hinges include a male hinge, a female hinge, a rotating shaft, and a torsion spring. The female hinge is fixed to both ends of one side of the mounting plate. The first and second unfolding hinges are arranged opposite to each other. The rotating shaft is fixed to the female hinge. The male hinge is rotatably connected to the rotating shaft and can unfold relative to the female hinge through the torsion spring. One end of the first antenna or the second antenna is fixed to the male hinge. The first antenna or the second antenna is perpendicular to the rotating shaft.

[0011] Furthermore, a limit switch is fixed at each end of one side of the mounting plate, and trigger rods for matching the limit switches are fixed on the male hinges of the first and second unfolding hinges; an elastic positioning rod is elastically connected to the female hinge, and a positioning block is fixed on the male hinge, with a positioning groove on the positioning block; when the female hinge and the male hinge rotate relative to each other to a set position, the trigger rod can trigger the limit switch to provide a positioning reminder, and the free end of the elastic positioning rod can slide into the positioning groove for positioning.

[0012] The beneficial effects of adopting the above-mentioned further solution are: by setting a limit switch, a positioning reminder can be achieved, and the elastic positioning rod can cooperate with the positioning groove on the positioning block to achieve snap-fit ​​positioning.

[0013] Furthermore, a stop block is connected to the male hinge, and a limit block is connected to the female hinge. When the male hinge rotates to a preset angle with the female hinge, the stop block abuts against the limit block to limit its position.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by setting a stop and a limit block, the angle between the male hinge and the female hinge can be adjusted and limited.

[0015] Furthermore, the heating wire of the hot-melt mechanism has an arc-shaped structure and is arranged diagonally above the guide pin. The other end of the rope passes upward through the heating wire, then goes upward around the receiving groove, and is finally fixed to the pre-tightening rod.

[0016] Furthermore, the pretensioning rod includes an integrally connected threaded section, a smooth cylindrical section, and a bolt head. The bolt head has a hexagonal groove on its end face. The threaded section of the pretensioning rod is threadedly connected to the side wall of the seat. The smooth cylindrical section has a through hole for securing the rope system. The rope can be wound around the smooth cylindrical section.

[0017] Furthermore, the hot-melt mechanism also includes a fixed base, a PCB board, a connecting rod, and a tension spring. The fixed base is fixed to the base body, and the connecting rod passes through the fixed base and can slide relative to the fixed base. The connecting rod is arranged perpendicularly to the guide pin. The tension spring is sleeved on the connecting rod and is in a compressed state. One end of the tension spring is fixed to the connecting rod, and the other end abuts against the fixed base. The end of the connecting rod that passes through the fixed base is provided with a PCB board, and both ends of the heating wire are respectively connected to the PCB board.

[0018] This utility model also provides a spacecraft, including a rod-shaped antenna as described above, and a spacecraft body, with the other side of the mounting plate fixed to the surface of the spacecraft body.

[0019] The beneficial effects of this utility model are as follows: In the spacecraft of this utility model, by setting the above-mentioned rod antenna, when the antenna needs to be deployed, the thermo-fusion structure supplies power and melts the rope. The antenna is deployed and locked under the action of the torsion spring of the deployment hinge and maintains the antenna deployment state. The deployment hinge and the thermo-fusion mechanism can be used to deploy small rod antennas. It has low cost, simple clamping method, reliable unlocking, and can be reused, providing certain technical support for small antennas. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the rod-shaped antenna of this utility model in its closed state; Figure 2 for Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 for Figure 1 Enlarged structural diagram of section B in the middle; Figure 4 This is a three-dimensional structural diagram of the unfolding hinge of this utility model; Figure 5This is a three-dimensional structural diagram of the hot-melt mechanism of this utility model; Figure 6 This is a cross-sectional view of the hot-melting mechanism of this utility model. Figure 7 This is a three-dimensional structural diagram of the deployed state of the rod-shaped antenna of this utility model.

[0021] The attached diagram lists the components represented by each number as follows: 1. Mounting plate; 11. Limit switch; 2. First antenna; 21. Second antenna; 3. First unfolding hinge; 31. Male hinge; 32. Female hinge; 33. Rotary shaft; 34. Torsion spring; 35. Trigger rod; 36. Limit block; 37. Stop block; 38. Elastic positioning rod; 4. Second unfolding hinge; 5. Seat body; 51. Preload rod; 52. Guide pin; 53. Rope body; 54. Receiving groove; 6. Hot melt mechanism; 61. Heating wire; 62. Fixing base; 63. PCB board; 64. Connecting rod; 65. Tension spring; 66. Positive wire; 67. Negative wire; 68. Retaining ring; 69. Fixing rod. Detailed Implementation

[0022] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0023] Example 1 like Figures 1-7 As shown, a rod-shaped antenna of this embodiment includes a mounting plate 1, a first antenna 2, a second antenna 21, a first unfolding hinge 3, a second unfolding hinge 4, a base 5, a thermoforming mechanism 6, a pre-tightening rod 51, a guide pin 52, and a rope 53. The base 5 is fixed at the middle position of one side of the mounting plate 1. The first unfolding hinge 3 and the second unfolding hinge 4 are respectively installed at both ends of one side of the mounting plate 1. One end of the first antenna 2 is connected to the first unfolding hinge 3, and one end of the second antenna 21 is connected to the second unfolding hinge 4. The hot-melting mechanism 6 is installed above one end of the base 5, the pre-tightening rod 51 is installed above the other end of the base 5, the guide pin 52 is installed in the middle of the base 5 and arranged parallel to the pre-tightening rod 51, and the base 5 is provided with two receiving slots 54 for placing the first antenna 2 and the second antenna 21; the first antenna 2 and the second antenna 21 can be closed or opened respectively through the first unfolding hinge 3 and the second unfolding hinge 4 and placed in the corresponding receiving slots 54 after being closed. One end of the rope 53 is fixed to the guide pin 52, and the other end of the rope 53 is fixed to the pretension rod 51. The middle part of the rope 53 passes around the receiving groove 54 on the base 5 and is used to press the first antenna 2 and the second antenna 21 into the receiving groove 54. The middle part of the rope 53 is also arranged adjacent to the heating wire 61 of the hot-melt mechanism 6.

[0024] like Figure 1 and Figure 7 As shown, in one specific embodiment, the mounting plate 1 has a rectangular structure, the receiving groove 54 is arranged through the mounting plate 1 along its length, and the rope 53 is arranged perpendicular to the receiving groove 54. By providing the receiving groove, the antenna can be positioned.

[0025] like Figure 1 , Figures 5-7 As shown, preferably, the two receiving slots 54 in this embodiment are arranged side by side in parallel. The heat fusion mechanism in this embodiment can be a heat fusion mechanism commonly used in aerospace release mechanisms.

[0026] In this embodiment, the rod antenna is folded in opposite directions and fixed to the mounting plate when it is folded up. When the antenna needs to be unfolded, the thermoforming mechanism is powered and melts the clamping rope. Under the force of the torsion spring of the unfolding hinge, the antenna unfolds, locks, and remains in the unfolded state, thus completing the antenna unfolding. This type of antenna unfolding mechanism is simple in form, reliable in unlocking, and reusable, providing unfolding options for small rod antennas. In this embodiment, the rod antenna achieves the clamping and releasing of the antenna by using a heating wire of the thermoforming mechanism to burn the rope, allowing for repeated use.

[0027] Example 2 Based on Embodiment 1, this embodiment provides a three-dimensional structural diagram of an unfolding hinge. (See diagram below.) Figures 1-4 As shown, in this embodiment, the first unfolding hinge 3 and the second unfolding hinge 4 each include a male hinge 31, a female hinge 32, a rotating shaft 33, and a torsion spring 34. The female hinge 32 is fixed to both ends of one side of the mounting plate 1. The first unfolding hinge 3 and the second unfolding hinge 4 are arranged opposite to each other. The rotating shaft 33 is fixed on the female hinge 32. The male hinge 31 is rotatably connected to the rotating shaft 33 and can be unfolded relative to the female hinge 32 through the torsion spring 34. One end of the first antenna 2 or the second antenna 21 is fixed on the male hinge 31. The first antenna 2 or the second antenna 21 is perpendicular to the rotating shaft 33.

[0028] like Figure 1 and Figure 7As shown, in this embodiment, a limit switch 11 is fixed at each end of one side of the mounting plate 1. A trigger rod 35, corresponding to the limit switch 11, is fixed on the male hinge 31 of the first and second unfolding hinges 3 and 4. An elastic positioning rod 38 is elastically connected to the female hinge 32, and a positioning block is fixed on the male hinge 31, with a positioning groove on the positioning block. When the female hinge 32 and male hinge 31 rotate relative to each other to a set position, the trigger rod 35 can trigger the limit switch 11 to provide a positioning reminder, and the free end of the elastic positioning rod 38 can slide into the positioning groove for positioning. By setting the limit switch, a positioning reminder can be achieved, and the elastic positioning rod cooperates with the positioning groove on the positioning block to achieve snap-fit ​​positioning.

[0029] like Figure 4 As shown, specifically, a stop block 37 is connected to the male hinge 31, and a limit block 36 is connected to the female hinge 32. When the male hinge 31 rotates to a preset angle with the female hinge 32, the stop block 37 abuts against the limit block 36 to limit its movement. By setting the stop block and the limit block, the angle between the male and female hinges can be adjusted and limited.

[0030] The unfolding hinge in this embodiment is used for antenna unfolding and locking, and provides a state retention for the antenna after unfolding. The male hinge, female hinge, rotation shaft, and torsion spring of the unfolding hinge are installed coaxially. The two arms of the torsion spring are respectively attached to the male hinge and female hinge. The hinge can unfold under the force of the torsion spring when there is no constraint. A stop block and a trigger rod are installed on both sides of the hinge. The stop block is used to limit the unfolding angle of the male hinge and female hinge. The trigger rod is used to contact the limit switch after the hinge is unfolded. To ensure that the hinge can be locked after unfolding, an elastic positioning rod is installed on the hinge. The elastic positioning rod is installed on the female hinge of the hinge. Its interior is mainly composed of a locking pin and a spring. After the hinge is unfolded to the position, the locking pin is pressed into the positioning groove of the positioning block of the male hinge under the force of the tail spring, thereby realizing the locking of the hinge after unfolding.

[0031] Example 3 Based on Embodiment 1 or Embodiment 2, this embodiment provides an optional solution for the hot-melt mechanism 6. For example... Figure 5 and Figure 6 As shown, in this embodiment, the heating wire 61 of the heat-melting mechanism 6 has an arc-shaped structure and is arranged obliquely above the guide pin 52. The other end of the rope 53 passes upward through the heating wire 61, then passes upward around the receiving groove 54, and is finally fixed to the pre-tensioning rod 51. Preferably, the heating wire 61 of the heat-melting mechanism 6 has a U-shaped structure.

[0032] Specifically, such as Figure 5 and Figure 6As shown, the pretensioning rod 51 in this embodiment includes an integrally connected threaded section, a smooth cylindrical section, and a bolt head. The bolt head has a hexagonal groove on its end face. The threaded section of the pretensioning rod 51 is threadedly connected to the side wall of the seat 5. The smooth cylindrical section has a through hole for securing the rope 53. The rope 53 can be wound around the smooth cylindrical section.

[0033] like Figure 5 and Figure 6 As shown, the hot-melt mechanism 6 in this embodiment further includes a fixed base 62, a PCB board 63, a connecting rod 64, and a tension spring 65. The fixed base 62 is fixed to the base 5. The connecting rod 64 passes through the fixed base 62 and can slide relative to the fixed base 62. The connecting rod 64 is arranged perpendicularly to the guide pin 52. The tension spring 65 is sleeved on the connecting rod 64 and is in a compressed state. One end of the tension spring 65 is fixed to the connecting rod 64, and the other end abuts against the fixed base 62. The PCB board 63 is provided at one end of the connecting rod 64 that passes through the fixed base 62. The two ends of the heating wire 61 are respectively connected to the PCB board 63. Two positive wires 66 and two negative wires 67 are connected to the PCB board 63. The fixed base 62 is fixed to the base 5. Figure 5 and Figure 6 As shown, in this embodiment, two connecting rods 64 are arranged in parallel at intervals. The two connecting rods 64 slide through the fixing base 62, and each connecting rod 64 is fitted with a compressed tension spring 65. The ends of the two connecting rods 64 facing away from the PCB board 63 can be connected by a fixing rod 69. The PCB board 63 can be fixed to the connecting rods 64. In this embodiment, a retaining ring 68 is also provided on the outer wall of the end of the connecting rod 64 that passes through the fixing base 62. The retaining ring 68 is located between the PCB board 63 and the fixing base 62, and can abut against the fixing base 62.

[0034] Specifically, in this embodiment, the base 5 includes two parallel and opposite sidewalls. The two ends of the guide pin 52 are perpendicularly connected to the two sidewalls respectively. The pre-tightening rod 51 is located between the two sidewalls and is perpendicularly fixedly connected to one of the sidewalls. The heat-fusion mechanism is installed between the two sidewalls. The base 5 has multiple mounting holes for connecting and fixing the base. One sidewall of the base 5 has a threaded hole, and the opposite sidewall of the threaded hole has a corresponding open hole for a screwdriver to pass through the hexagonal slot and tighten the pre-tightening rod. Multiple mounting bosses are reserved on the base, each with a connecting hole for installing the entire clamping and releasing device.

[0035] In this embodiment, the heat-melting mechanism 6 is used to melt and cut the compressed rope. The heating wire at its front end is also equipped with a tension spring. Under the action of the tension spring, the heating wire at the front end always keeps in contact with the rope.

[0036] Example 4 This embodiment provides a spacecraft, including a rod-shaped antenna as described in any of the above embodiments, and a spacecraft body, with the other side of the mounting plate 1 fixed to the surface of the spacecraft body.

[0037] In this embodiment of the spacecraft, the rod-shaped antennas are folded in opposite directions. The first and second antennas are pressed together in the side-by-side receiving slots by the action of the rope. When the antennas need to be deployed, the thermoforming mechanism supplies power and melts the rope, releasing the pressed antennas from their constraints. Under the action of various deployment hinge torsion springs, the antennas are deployed and locked, maintaining their deployed state. After the deployment hinges are deployed, the trigger rod on the deployment hinge touches the limit switch and sends a telemetry signal indicating that the antennas have been deployed to the correct position. Each set of deployment hinges is equipped with a limit switch, which can detect whether the antenna on one side has been deployed after entering the orbit. The antennas on both sides are deployed to the correct position asynchronously.

[0038] In this embodiment of the spacecraft, by setting up the aforementioned rod-shaped antenna, when the antenna needs to be deployed, the thermo-fusion structure supplies power and melts the rope. Under the action of the torsion spring of the deployment hinge, the antenna is deployed and locked, maintaining the antenna in the deployed state. The deployment hinge and the thermo-fusion mechanism can be used to deploy small rod-shaped antennas. It is low in cost, has a simple clamping method, reliable unlocking, and is reusable, providing certain technical support for small antennas.

[0039] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "inside" and "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rod-shaped antenna, characterized in that, The device includes a mounting plate, a first antenna, a second antenna, a first unfolding hinge, a second unfolding hinge, a base, a heat-fusion mechanism, a pre-tensioning rod, a guide pin, and a rope. The base is fixed to the middle position of one side of the mounting plate. The first and second unfolding hinges are respectively installed at both ends of one side of the mounting plate. One end of the first antenna is connected to the first unfolding hinge, and one end of the second antenna is connected to the second unfolding hinge. The hot-melting mechanism is installed above one end of the base, the pre-tightening rod is installed above the other end of the base, the guide pin is installed in the middle of the base and arranged parallel to the pre-tightening rod, and the base is provided with two receiving slots for placing the first antenna and the second antenna; the first antenna and the second antenna can be closed or opened respectively through the first unfolding hinge and the second unfolding hinge and placed in the corresponding receiving slot after being closed. One end of the rope is fixed to the guide pin, and the other end of the rope is fixed to the pretensioning rod. The middle part of the rope passes around the receiving groove on the base and is used to press the first antenna and the second antenna into the receiving groove. The middle part of the rope is also arranged near the heating wire of the hot-melt mechanism.

2. The rod-shaped antenna according to claim 1, characterized in that, The mounting plate has a rectangular structure, the receiving groove is arranged through the length direction parallel to the mounting plate, and the rope is arranged perpendicular to the receiving groove.

3. The rod-shaped antenna according to claim 1, characterized in that, The two receiving slots are arranged side by side in parallel.

4. The rod-shaped antenna according to claim 1, characterized in that, The first and second unfolding hinges each include a male hinge, a female hinge, a rotating shaft, and a torsion spring. The female hinge is fixed to both ends of one side of the mounting plate. The first and second unfolding hinges are arranged opposite to each other. The rotating shaft is fixed to the female hinge. The male hinge is rotatably connected to the rotating shaft and can be unfolded relative to the female hinge through the torsion spring. One end of the first antenna or the second antenna is fixed to the male hinge. The first antenna or the second antenna is perpendicular to the rotating shaft.

5. A rod-shaped antenna according to claim 4, characterized in that, A limit switch is fixed at each end of one side of the mounting plate. A trigger rod corresponding to the limit switch is fixed on the male hinge of the first and second unfolding hinges. An elastic positioning rod is elastically connected to the female hinge. A positioning block is fixed on the male hinge. A positioning groove is opened on the positioning block. When the female hinge and the male hinge rotate relative to each other to a set position, the trigger rod can trigger the limit switch to remind the user to enter the position. The free end of the elastic positioning rod can slide into the positioning groove for positioning.

6. A rod-shaped antenna according to claim 4, characterized in that, A stop block is connected to the male hinge, and a limit block is connected to the female hinge. When the male hinge rotates to a preset angle with the female hinge, the stop block abuts against the limit block to limit its position.

7. A rod-shaped antenna according to claim 1, characterized in that, The heating wire of the hot-melt mechanism has an arc-shaped structure and is arranged diagonally above the guide pin. The other end of the rope passes upward through the heating wire, then goes upward around the receiving groove, and is finally fixed to the pre-tightening rod.

8. A rod-shaped antenna according to claim 1, characterized in that, The pretensioning rod includes an integrally connected threaded section, a smooth cylindrical section, and a bolt head. The bolt head has a hexagonal groove on its end face. The threaded section of the pretensioning rod is threaded to the side wall of the seat. The smooth cylindrical section has a through hole for securing the rope system. The rope can be wound around the smooth cylindrical section.

9. A rod-shaped antenna according to claim 1, characterized in that, The hot-melting mechanism further includes a fixed base, a PCB board, a connecting rod, and a tension spring. The fixed base is fixed to the base body, and the connecting rod passes through the fixed base and can slide relative to the fixed base. The connecting rod is arranged perpendicularly to the guide pin. The tension spring is sleeved on the connecting rod and is in a compressed state. One end of the tension spring is fixed to the connecting rod, and the other end abuts against the fixed base. The PCB board is provided at one end of the connecting rod that passes through the fixed base, and both ends of the heating wire are connected to the PCB board.

10. A spacecraft, characterized in that, The device includes a rod-shaped antenna as described in any one of claims 1 to 9, and also includes a spacecraft body, with the other side of the mounting plate fixed to the surface of the spacecraft body.

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