Model airplane brake parachute system and brake parachute unfolding and retracting method

Abstract

The model airplane brake parachute system comprises a parachute pack cover plate, an unlocking assembly and a steering engine, the steering engine can control a rocker arm to push the unlocking assembly to leave the parachute pack cover plate, the unlocking assembly comprises a switch push block, a rotating shaft, a rotating piece and a torsional spring, and a switch mounting groove is formed in the switch push block; the rotating piece is matched with the rotating shaft to be installed in the switch installation groove in a swinging mode, a torsion spring installation groove is formed in the top of the rotating piece, the rotating shaft penetrates through the torsion spring installation groove, the torsion spring is matched with the rotating shaft to be arranged in the torsion spring installation groove, a torsion arm of the torsion spring abuts against the groove bottom of the torsion spring installation groove, and the torsion arm pushes the rotating piece to abut against one side of the switch installation groove. According to the model airplane brake parachute system, a rocker arm is controlled by a steering engine to push an unlocking assembly to unlock a parachute pack cover plate, and the unlocking assembly automatically resets under the action of a reset spring. Through the ingenious mechanical structure design, the brake parachute pack can be installed without resetting the rocker arm, and the use experience of a user is improved.

Description

Technical Field

[0001] The invention relates to the field of aircraft model deceleration parachute design, in particular to an aircraft model deceleration parachute system and a use method thereof. Background Art

[0002] Model airplanes generally refer to models that can fly in the air. Generally, they need to taxi for a certain distance before they can stop after landing. Especially for jet model airplanes, they have a relatively high speed when landing, and the taxiing distance after landing will be relatively long, and they may even run off the runway and cause damage. Therefore, the applicant adds a deceleration parachute device to the model airplane to achieve deceleration of the model airplane after landing, shorten the taxiing distance, allow the model airplane to stop in a short time, and also increase playability.

[0003] Since the drag parachute device is controlled by a servo, the servo needs to be reset before the drag parachute can be recovered. Based on this, the applicant has achieved the recovery of the parachute without resetting the servo through an ingenious mechanical structure. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a model aircraft deceleration parachute system.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the present invention relates to a model aircraft deceleration parachute system, including a parachute cover, an unlocking assembly and a servo, the servo can control a rocker arm to push the unlocking assembly away from the parachute cover, the unlocking assembly includes a switch push block, a rotating shaft, a rotating part and a torsion spring, the switch push block is provided with a switch mounting groove, the rotating part cooperates with the rotating shaft to be swingably installed in the switch mounting groove, the top of the rotating part is provided with a torsion spring mounting groove, the rotating shaft passes through the torsion spring mounting groove, the torsion spring cooperates with the rotating shaft to be arranged in the torsion spring mounting groove, the torsion arm of the torsion spring is against the bottom of the torsion spring mounting groove, and the torsion arm pushes the rotating part against one side of the switch mounting groove.

[0006] Preferably, the unlocking assembly also includes a reset spring, one end of the switch push block is provided with a hook head for connecting and cooperating with the umbrella bag cover, the other end of the switch push block is provided with a spring mounting column, and the reset spring is sleeved on the spring mounting column.

[0007] Preferably, a first push surface and a second push surface for the rocker arm to push are provided at the bottom of the rotating member, the first push surface faces the hook head, and the second push surface faces the spring mounting column.

[0008] Preferably, a snap fastener is provided on the umbrella cover plate, a first inclined surface is provided on the snap fastener, and a second inclined surface matching the first inclined surface is provided on the hook head.

[0009] Preferably, it also includes a deceleration parachute cabin, a deceleration parachute pack, and a parachute pack ejection device. The deceleration parachute cabin is provided with a parachute pack slot, the bottom of the parachute pack slot is provided with a parachute pack ejection device, the deceleration parachute pack is placed on the parachute pack ejection device, the opening of the parachute pack slot is provided with a parachute pack cover that can be opened or closed, and the parachute pack ejection device provides thrust to push the deceleration parachute pack against the parachute pack cover.

[0010] Preferably, a first groove and a second groove are provided on the deceleration parachute cabin, the first groove and the second groove are respectively arranged on both sides of the parachute bag groove, a tension spring is provided in the first groove, the tension spring is connected to the parachute bag cover plate, and the unlocking assembly and the servo are fixedly arranged in the second groove.

[0011] Preferably, the umbrella cover includes a fixed end and a free end, the fixed end can be arranged in a flip-up manner between the umbrella slot and the first groove, when the umbrella cover closes the umbrella slot, the free end enters the second groove, the free end is provided with a snap-fit ​​piece, and the snap-fit ​​piece is provided with a snap-fit ​​opening.

[0012] Preferably, the parachute pack ejection device includes a parachute pack push block, an ejection spring, a spring fixing block and a spring fixing seat, the spring fixing seat is installed at the bottom of the parachute pack slot, one end of the ejection spring is fixed on the spring fixing seat, the other end of the ejection spring cooperates with the spring fixing block to be connected with the parachute pack push block, the deceleration parachute pack is placed on the parachute pack push block, the ejection spring provides spring force to push the parachute pack push block, and the parachute pack push block presses the deceleration parachute pack under the parachute pack cover.

[0013] Preferably, it also includes a cabin door, which can be installed on the deceleration parachute cabin in a flip-up manner.

[0014] Preferably, the cabin door is made of metal magnetic material, the deceleration parachute cabin body is provided with a magnet fixing seat, and the magnet fixing seat is provided with a plurality of magnets for adsorbing the cabin door.

[0015] The present invention also relates to a method for deploying and recovering a deceleration parachute, which comprises the following steps: S1, deceleration parachute pack exits the cabin: start the servo to drive the rocker arm to rotate. As the rocker arm rotates, the rotating part pushes the switch push block backward, thereby causing the switch push block to detach from the parachute pack cover plate, releasing the brake of the switch push block on the parachute pack cover plate, and the parachute pack ejection device pushes the deceleration parachute pack through the parachute pack cover plate and the cabin door and then ejects it; at the same time, the switch push block resets forward; S2. Recovery of the deceleration parachute pack: Press the deceleration parachute pack into the parachute pack slot. After the parachute pack cover is closed on the parachute pack slot, the switch push block locks the parachute pack cover. Start the servo to drive the rocker arm to rotate. The rotating part rotates under the push of the rocker arm. After the rocker arm is reset, the rotating part automatically rotates and resets.

[0016] The present invention also relates to an aircraft model, on which a deceleration parachute cabin mounting groove is provided, and the aircraft model deceleration parachute system is arranged on the aircraft model.

[0017] The beneficial effects of the present invention are as follows: the present invention relates to a model aircraft deceleration parachute system, in which the unlocking assembly is pushed by a servo control rocker arm to release the connection with the parachute cover, so that the parachute cover opens the parachute slot, and the parachute ejection device provides thrust to push the deceleration parachute pack to the outside, so that the deceleration parachute pack pops out of the parachute slot, and the ejected deceleration parachute pack provides a deceleration effect for the model aircraft.

[0018] At the same time, in the present invention, the deceleration parachute bag can be directly installed into the parachute bag slot first, and then the rocker arm can be reset by the steering gear. When the rocker arm is reset, the rocker arm pushes the second push surface of the rotating part, and the rotating part swings backward due to the thrust; when the rocker arm is completely reset, the rocker arm leaves the rotating part, and under the torsion of the torsion spring, the torsion arm pushes the rotating part to swing the rotating part back to the original position, preparing for the next parachute opening. The present invention does not need to reset the rocker arm before installing the deceleration parachute bag, which effectively simplifies the operation steps and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the deceleration parachute cabin of the present invention.

[0021] Figure 3 It is a structural diagram after the hatch of the present invention is opened.

[0022] Figure 4 It is a schematic diagram of the internal structure (without the umbrella cover) of the present invention.

[0023] Figure 5 It is an overall cross-sectional schematic diagram of the unlocking assembly of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the switch push block of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the rotating part of the present invention.

[0026] Figure 8 It is a schematic structural diagram of a torsion spring of the present invention being installed on a rotating member in cooperation with a rotating shaft.

[0027] Fig. 9 It is a structural schematic diagram of an umbrella bag cover plate of the present invention.

[0028] Fig.10 It is an overall cross-sectional schematic diagram of the present invention in an initial state.

[0029] Fig.11 It is a structural diagram of the present invention after the rocker arm pushes the unlocking assembly to make the unlocking assembly leave the umbrella bag cover plate.

[0030] Fig.12 It is an overall schematic diagram of the deceleration parachute package of the present invention when installed.

[0031] Fig.13 It is a schematic diagram of the cooperation between the parachute bag cover and the unlocking assembly when the deceleration parachute bag of the present invention is installed.

[0032] Fig.14 It is a structural schematic diagram of the rocker arm during the resetting process of the present invention.

[0033] Fig.15 It is a schematic diagram of the structure after the rocker arm of the present invention is reset.

[0034] Fig.16 It is a structural diagram of the aircraft model deceleration parachute system of the present invention applied to the aircraft model.

[0035] Reference numerals 1. Deceleration parachute cabin; 11. Parachute bag slot; 12. First groove; 121. Tension spring; 13. Second groove; 131. Switch cover; 14. Magnet fixing seat; 141. Magnet; 2. Deceleration parachute pack; 3. Parachute ejection device; 31. Parachute push block; 32. Ejection spring; 33. Spring fixing block; 34. Spring fixing seat; 4. Umbrella cover; 41. Fixed end; 42. Free end; 421. Buckle; 422. Buckle opening; 423. First inclined surface; 5. unlocking assembly; 51. switch push block; 511. hook head; 5111. second inclined surface; 512. switch mounting slot; 513. spring mounting column; 52. rotating shaft; 53. rotating member; 531. torsion spring mounting slot; 532. first push surface; 533. second push surface; 54. torsion spring; 541. torsion arm; 55. reset spring; 56. switch bracket; 6. Rocker arm; 7. Servo; 8. Door; 100. Model aircraft parachute system; 200. Model aircraft; DETAILED DESCRIPTION

[0036] See also Figure 1-16As shown, the present invention relates to a model aircraft deceleration parachute system, the model aircraft deceleration parachute system 100 is arranged on the model aircraft 200, which includes a deceleration parachute cabin 1, a deceleration parachute bag 2, a bag ejection device 3, a bag cover 4, an unlocking component 5, a rocker arm 6 and a steering gear 7, the deceleration parachute cabin 1 is provided with a bag slot 11 for accommodating the deceleration parachute bag 2, the bottom of the bag slot 11 is provided with a bag ejection device 3, the deceleration parachute bag 2 is placed on the bag ejection device 3, the bag ejection device 3 provides thrust to push the deceleration parachute bag 2 against the bag cover 4, the opening of the bag slot 11 is provided with a bag cover 4 that can be opened or closed, the unlocking component 5 is arranged on the deceleration parachute cabin 1, the unlocking component 5 is cooperatively connected with the bag cover 4, the steering gear 7 is arranged on the deceleration parachute cabin 1, and the steering gear 7 controls the rocker arm 6 to push the unlocking component 5 away from the bag cover 4, so that the bag cover 4 opens the bag slot 11.

[0037] When the servo 7 controls the rocker arm 6 to push the unlocking assembly 5 away from the parachute cover 4, the parachute cover 4 opens the parachute slot 11. Since the parachute ejection device 3 is not subject to resistance from the parachute cover 4, the parachute ejection device 3 provides thrust to push the deceleration parachute pack 2 out of the parachute slot 11, so that the deceleration parachute pack 2 pops out of the parachute slot 11. The ejected deceleration parachute pack 2 provides a deceleration effect for the model aircraft 200.

[0038] In this embodiment, the deceleration parachute cabin 1 is provided with a first groove 12 and a second groove 13, and the first groove 12 and the second groove 13 are respectively provided on both sides of the umbrella bag slot 11. The umbrella bag cover 4 includes a fixed end 41 and a free end 42, and the fixed end 41 can be flip-covered and arranged on a side of the umbrella bag slot 11 close to the first groove 12. When the umbrella bag cover 4 closes the umbrella bag slot 11, the free end 42 enters the second groove 13, and the free end 42 is provided with a buckle 421, and the buckle 421 is provided with a buckle opening 422 that cooperates with the unlocking component 5.

[0039] Furthermore, a tension spring 121 is provided on the wall surface of the first groove 12, and the tension spring 121 is connected to the umbrella cover 4. When the unlocking component 5 releases the umbrella cover 4, the elastic potential energy of the tension spring 121 pulls the umbrella cover 4 to open the umbrella groove 11.

[0040] Further, the unlocking assembly 5 and the steering gear 7 are arranged in the second groove 13, and the steering gear 7 is provided with a rocker arm 6 for pushing the unlocking assembly 5 away from the buckle opening 422. The unlocking assembly 5 is fixed in the second groove 13 by a switch bracket 56, and the second groove 13 is provided with a switch cover plate 131 for protecting internal components. The unlocking assembly 5 includes a switch push block 51, a rotating shaft 52, a rotating member 53, a torsion spring 54 and a return spring 55. The switch push block 51 is provided with a hook head 511, a switch installation groove 512 and a spring installation column 513 from the beginning to the end. The hook head 511 is used to cooperate with the buckle opening 422. The rotating member 53 and the torsion spring 54 are installed in the switch installation groove 512 in cooperation with the rotating shaft 52. One end of the return spring 55 is sleeved on the spring installation column 513, and the other end of the return spring 55 is against the wall surface of the second groove 13.

[0041] The top of the rotating member 53 is provided with a torsion spring installation groove 531 for installing the torsion spring 54. The rotating shaft 52 passes through the torsion spring installation groove 531. The torsion spring 54 is arranged in the torsion spring installation groove 531 in cooperation with the rotating shaft 52. The torsion arm 541 of the torsion spring 54 abuts against the bottom of the torsion spring installation groove 531. The cross section of the switch installation groove 512 is triangular. The rotating member 53 is swingably installed in the switch installation groove 512 in cooperation with the rotating shaft 52. The triangular cross section of the switch installation groove 512 can provide a larger swing space for the rotating member 53. Under the torsion force of the torsion spring 54, the torsion arm 541 pushes the bottom of the switch installation groove 512, and the rotating member 53 is always pushed toward one side of the switch installation groove 512. When the torsion spring 54 abuts the rotating member 53 against one side of the switch installation groove 512, the switch installation groove 512 limits the position of the rotating member 53, so that the torsion arm 541 cannot continue to push the rotating member 53, thereby fixing the position of the rotating member 53. When the rocker arm 6 pushes the rotating member 53 , the rotating member 53 cannot continue to swing because it is limited by the switch mounting groove 512 , thereby pushing the switch push block 51 to move.

[0042] Furthermore, a first push surface 532 and a second push surface 533 are provided at the bottom of the rotating member 53. In the present embodiment, in the initial state, the umbrella cover 4 is covered on the umbrella groove 11, and the hook head 511 extends into the buckle opening 422 for matching connection, and the switch push block 51 will lock the umbrella cover 4 to prevent the umbrella cover 4 from opening. At this time, the rocker arm 6 is located on the side of the first push surface 532; when the rocker arm 6 is pushed toward the first push surface 532, the hook head 511 extends out of the buckle opening 422, and the reset spring 55 is compressed and deformed and stores elastic potential energy; when the hook head 511 is completely extended out of the buckle opening 422, the switch push block 51 will release the lock on the umbrella cover 4, and the pull The force spring 121 releases elastic potential energy to open the umbrella cover 4. At the same time, the rocker arm 6 leaves the rotating part 53 due to its circular swing. Because the rocker arm 6 contacts the thrust of the rotating part 53, the reset spring 55 releases elastic potential energy to reset the switch push block 51. At this time, the rocker arm 6 is close to the second push surface 533. When it is necessary to reset the rocker arm 6 to the initial position, the steering gear 7 controls the rocker arm 6 to swing back, and the rocker arm 6 is pushed toward the second push surface 533, and the rotating part 53 swings backward due to the thrust. When the rocker arm 6 is completely reset, under the torsion of the torsion spring 54, the torsion arm 541 pushes the bottom of the switch mounting slot 512 to swing the rotating part 53 back to its original position, preparing for the next umbrella opening.

[0043] In this embodiment, the parachute bag ejection device 3 includes a parachute bag push block 31, an ejection spring 32, a spring fixing block 33 and a spring fixing seat 34. The spring fixing seat 34 is installed at the bottom of the parachute bag slot 11. One end of the ejection spring 32 is fixed on the spring fixing seat 34. The other end of the ejection spring 32 cooperates with the spring fixing block 33 to connect with the parachute bag push block 31. The deceleration parachute bag 2 is placed on the parachute bag push block 31. The ejection spring 32 provides a spring force to push the parachute bag push block 31. The parachute bag push block 31 pushes the deceleration parachute bag 2 under the parachute bag cover 4. When the parachute bag cover 4 is opened, the ejection spring 32 releases elastic potential energy to eject the deceleration parachute bag 2 out of the parachute bag slot 11. The ejected deceleration parachute bag 2 provides a deceleration effect for the aircraft model 200.

[0044] In this embodiment, the model aircraft deceleration parachute system 100 also includes a cabin door 8, which can be installed on the deceleration parachute cabin 1 in a flip-up manner. The cabin door 8 is arranged above the parachute cover 4. When the parachute cover 4 is opened, the parachute cover 4 is pushed toward the cabin door 8 to open the cabin door 8.

[0045] Furthermore, in this embodiment, the hatch 8 is made of metal magnetic material, and the hatch 8 has magnetism. A magnet fixing seat 14 is provided in the first groove 12, and a plurality of magnets 141 for adsorbing the hatch 8 are provided on the magnet fixing seat 14. When the hatch 8 is closed, the magnets 141 adsorb the hatch 8 to prevent the hatch 8 from opening.

[0046] Furthermore, the buckle 421 is provided with a first inclined surface 423, and the hook 511 is provided with a second inclined surface 5111. In the present invention, when the deceleration parachute pack 2 needs to be installed on the deceleration parachute cabin 1, the deceleration parachute pack 2 is first pressed on the parachute pack ejection device 3, and then the parachute pack cover plate 4 is covered on the parachute pack slot 11. At this time, the first inclined surface 423 will be against the second inclined surface 5111. The second inclined surface 5111 is subjected to a thrust, so that the switch push block 51 moves outward. When the buckle opening 422 is aligned with the hook 511, the hook 511 enters the buckle opening 422 for matching connection. At this time, the parachute pack cover plate 4 has been locked by the switch push block 51 and cannot be opened. Finally, the cabin door 8 is closed, and the magnet 141 adsorbs the cabin door 8, thereby completing the installation steps.

[0047] The following is a method for deploying and recovering the deceleration parachute pack 2 of the present invention, comprising the following steps: In the initial state, the umbrella cover plate 4 covers the umbrella groove 11, the hook head 511 extends into the buckle opening 422, and the switch push block 51 locks the umbrella cover plate 4 on the umbrella groove 11; S1. The deceleration parachute pack exits the cabin: the rocker arm 6 is controlled to rotate by the servo 7, and the rocker arm 6 is pushed toward the first push surface 532 of the rotating member 53. The rotating member 53 cannot rotate under the action of the torsion spring 54, and the rotating member 53 drives the switch push block 51 to move backward, so that the hook head 511 leaves the buckle opening 422, and the return spring 55 is compressed and deformed and stores elastic potential energy; when the hook head 511 is completely extended out of the buckle opening 422, the switch push block 51 will release the lock on the parachute pack cover 4, and the tension spring 121 releases the elastic potential energy to open the parachute pack cover 4, and the parachute pack ejection device 3 pushes the deceleration parachute pack 2 to open the parachute pack cover 4 and the cabin door 8 and then ejects; at the same time, the return spring 55 releases its elasticity to reset the switch push block 51; S2. To recover the deceleration parachute pack, first press the deceleration parachute pack 2 onto the parachute pack ejection device 3, and then close the parachute pack cover 4 onto the parachute pack slot 11. At this time, the first inclined surface 423 will abut against the second inclined surface 5111 and push downward. The second inclined surface 5111 is subjected to the thrust, causing the switch push block 51 to move outward. When the buckle opening 422 is aligned with the hook head 511, the hook head 511 enters the buckle opening 422 for matching connection. At this time, the parachute pack cover 4 is locked by the switch push block 51 and cannot be opened. The rocker arm 6 is controlled by the servo engine 7 to swing back. The rocker arm 6 is pushed toward the second push surface 533 of the rotating member 53. The rotating member 53 swings backward due to the thrust. When the rocker arm 6 is fully reset, the rocker arm 6 leaves the rotating member 53. Under the torsion force of the torsion spring 54, the torsion arm 541 pushes the bottom of the torsion spring mounting slot 531, causing the rotating member 53 to abut against the switch mounting slot 512.

[0048] The present invention relates to a model aircraft deceleration parachute system. In the present invention, the servo 7 controls the rocker arm 6 to push the unlocking component 5 to release the connection with the parachute cover 4, so that the parachute cover 4 opens the parachute slot 11, and the parachute ejection device 3 provides thrust to push the deceleration parachute bag 2 to the outside, so that the deceleration parachute bag 2 pops out of the parachute slot 11. The ejected deceleration parachute bag 2 provides a deceleration effect for the model aircraft 200.

[0049] At the same time, in the present invention, the deceleration parachute bag 2 can be directly installed into the parachute bag slot 11, and then the rocker arm 6 can be reset by the steering gear 7. When the rocker arm 6 is reset, the second push surface 533 of the rocker arm 6 is pushed toward the rotating member 53, and the rotating member 53 swings backward due to the thrust; when the rocker arm 6 is completely reset, the rocker arm 6 leaves the rotating member 53, and under the torsion of the torsion spring 54, the torsion arm 541 pushes the rotating member 53, and the rotating member 53 swings back to the original position, preparing for the next parachute opening. The present invention does not need to reset the rocker arm 6 before installing the deceleration parachute bag 2, which effectively simplifies the operation steps and improves the user experience.

[0050] The present invention relates to a model aircraft deceleration parachute system, in which a servo controls a rocker arm to push an unlocking component to release the lock with the parachute bag cover, and the unlocking component automatically resets under the action of a reset spring. The present invention improves the user experience by cleverly designing a mechanical structure so that the rocker arm does not need to be reset before the deceleration parachute bag can be installed.

[0051] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A model aircraft deceleration parachute system, comprising a parachute cover and a cover unlocking device, characterized in that: The cover unlocking device includes a servo, a rocker arm and an unlocking assembly. The servo controls the rocker arm to push the unlocking assembly away from the parachute cover to unlock the parachute cover. The unlocking assembly resets and cooperates with the parachute cover to lock the parachute cover. The unlocking assembly includes a switch push block, a rotating shaft, a rotating member and a reset spring. The reset spring is used to reset the switch push block. The rotating member rotates unidirectionally on the switch push block through the rotating shaft.

2. The model aircraft deceleration parachute system according to claim 1, characterized in that: A switch mounting groove is provided on the switch push block, and the rotating member can be swingably installed in the switch mounting groove in cooperation with the rotating shaft. A torsion spring mounting groove is provided on the top of the rotating member, and the rotating shaft passes through the torsion spring mounting groove. The torsion spring is arranged in the torsion spring mounting groove in cooperation with the rotating shaft, and the torsion arm of the torsion spring abuts against the bottom of the torsion spring mounting groove, and the torsion arm pushes the rotating member against one side of the switch mounting groove.

3. The model aircraft deceleration parachute system according to claim 1, characterized in that: One end of the switch push block is provided with a hook head for connecting and cooperating with the umbrella bag cover plate, and the umbrella bag cover plate is provided with a snap fastener cooperating with the hook head.

4. The model aircraft deceleration parachute system according to claim 3, characterized in that: The bottom of the rotating member is provided with a first pushing surface and a second pushing surface for the rocker arm to push, the first pushing surface faces the hook head, and the second pushing surface faces away from the hook head.

5. The model aircraft deceleration parachute system according to claim 3, characterized in that: The buckle is provided with a first inclined surface, and the hook head is provided with a second inclined surface matching the first inclined surface.

6. The model aircraft deceleration parachute system according to claim 1, characterized in that: It also includes a deceleration parachute cabin, a deceleration parachute pack, and a parachute pack ejection device. The deceleration parachute cabin is provided with a parachute pack slot, the bottom of the parachute pack slot is provided with a parachute pack ejection device, the deceleration parachute pack is placed on the parachute pack ejection device, the opening of the parachute pack slot is provided with a parachute pack cover that can be opened or closed, and the parachute pack ejection device provides thrust to push the deceleration parachute pack against the parachute pack cover.

7. The model aircraft deceleration parachute system according to claim 6, characterized in that: The deceleration parachute cabin is provided with a first groove and a second groove, the first groove and the second groove are respectively arranged on both sides of the parachute bag slot, a tension spring is arranged in the first groove, the tension spring is connected to the parachute bag cover, the unlocking assembly and the servo are fixedly arranged in the second groove, the parachute bag cover includes a fixed end and a free end, the fixed end can be arranged in a flip-cover style between the parachute bag slot and the first groove, and when the parachute bag cover closes the parachute bag slot, the free end enters the second groove.

8. The model aircraft deceleration parachute system according to claim 6, characterized in that: The parachute pack ejection device includes a parachute pack pushing block, an ejection spring, a spring fixing block and a spring fixing seat. The spring fixing seat is installed at the bottom of the parachute pack slot. One end of the ejection spring is fixed on the spring fixing seat. The other end of the ejection spring cooperates with the spring fixing block to connect with the parachute pack pushing block. The deceleration parachute pack is placed on the parachute pack pushing block. The ejection spring provides spring force to push the parachute pack pushing block, and the parachute pack pushing block presses the deceleration parachute pack under the parachute pack cover.

9. A method for deploying and recovering a deceleration parachute, characterized in that: The model aircraft deceleration parachute system according to any one of claims 1 to 8 comprises the following steps: S1, deceleration parachute pack exits the cabin: start the servo to drive the rocker arm to rotate. As the rocker arm rotates, the rotating part moves the switch push block, thereby disengaging the switch push block from the parachute pack cover, releasing the lock of the switch push block on the parachute pack cover, and the parachute pack ejection device pushes the deceleration parachute pack through the parachute pack cover and the cabin door and then ejects it; at the same time, the switch push block automatically resets; S2. Recovery of the deceleration parachute pack: Press the deceleration parachute pack into the parachute pack slot. After the parachute pack cover is closed on the parachute pack slot, the switch push block locks the parachute pack cover. Start the servo to drive the rocker arm to rotate. The rotating part rotates unidirectionally under the push of the rocker arm. After the rocker arm is reset, the rotating part automatically rotates and resets.

10. A model aircraft, characterized in that: A model aircraft deceleration parachute system as claimed in any one of claims 1 to 8 is adopted.

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