Automatic starting device for backup parachute

Abstract

The present invention relates to the technical field of parachute starting devices, and discloses an automatic starting device for a backup parachute, comprising a shell, a belt ring, a telescopic component, a limit component, a cable, a pull ring and a control component; a belt ring is provided on the side of the shell; the telescopic component is arranged in the shell, a cable hole is provided on the shell, one end of the cable is connected to the telescopic component, and the other end extends out of the shell from the cable hole and is provided with a pull ring; the limit component is arranged in the shell to limit the telescopic component in a compressed state; the control component is arranged in the shell and electrically connected to the limit component, and is used to detect the state of the device and the personnel and control the limit component to release the restriction on the telescopic component according to a predetermined instruction to pull the cable into the shell. The automatic starting device for a backup parachute of the present invention can automatically open the backup parachute when the parachutist is unable to open the parachute by himself, thereby saving the life of the parachutist and reducing casualties.

Description

Technical Field

[0001] The invention relates to the technical field of parachute starting devices, in particular to an automatic starting device for a backup parachute. Background Art

[0002] The backup parachute is a parachute used to ensure the skydiver's safe landing in the event of a main parachute failure during a skydive.

[0003] The front view and rear view of a certain type of reserve parachute in the prior art are as follows: Figure 1 and Figure 2 As shown in the figure, the parachute bag of this type of reserve parachute is a chest-type parachute bag design structure, which mainly includes: 01, upper protection cloth; 02, handle; 03, reserve parachute hanging ring; 04, locking piece; 05, left protection cloth; 06, backup bag; 07, lower protection cloth; 08, brocade buckle; 09, lock pin protection cover; 010, keyhole; 011, parachute mark; 012, rubber rope hanging ring; 013, pull ring bag; 014, right protection cloth; 015, paratrooper knife bag; 016, paratrooper knife fixing belt; 017, locking cone; 018, drawstring sleeve. The parachute bag structure consists of the bottom and 4 pieces of protection cloth: upper, lower, left and right. The two locking cones 017 of the upper protective cloth 01, the two locking eyes 010 of the lower protective cloth 07, the two locking pieces 04 of the left and right protective cloths, and the ring bag 013 of the right protective cloth 014 cooperate with the ring and the parachute opening rope to form a blocking device. In actual use, the parachute opening rope is pulled to drive the ring, thereby driving the locking cone 017 and the locking piece 04 to be released from the ring eye 010 to open the reserve parachute.

[0004] The above-mentioned type of backup parachute can be used in conjunction with various types of main parachutes, and can better guarantee the troops' parachute training tasks.

[0005] However, since this type of backup parachute can only be opened by hand, if the main parachute is abnormal and the skydiver is unconscious or unconscious, it is difficult for the backup parachute to play its role and the skydiver's life safety cannot be guaranteed. Summary of the invention

[0006] The purpose of the present invention is: the present invention provides an automatic starting device for a backup parachute to solve the technical problem that the backup parachute in the prior art has only one way of opening the parachute by hand, and when the main parachute is abnormal and the parachutist is comatose or unconscious, it is difficult to play the role of the backup parachute and the life safety of the parachutist cannot be guaranteed.

[0007] In order to achieve the above-mentioned purpose, the present invention provides an automatic starting device for a backup parachute, comprising a shell, a belt ring, a telescopic assembly, a limit assembly, a cable, a pull ring and a control assembly; the belt ring is provided on the side of the shell; the telescopic assembly is arranged in the shell, and a cable hole is provided on the shell, one end of the cable is connected to the telescopic assembly, and the other end extends out of the shell from the cable hole and is provided with the pull ring; the limit assembly is arranged in the shell to limit the telescopic assembly to a compressed state; the control assembly is arranged in the shell and electrically connected to the limit assembly, and is used to detect the status of the device and the personnel and control the limit assembly according to predetermined instructions to release the restriction on the telescopic assembly to pull the cable toward the inside of the shell.

[0008] In some embodiments of the present application, a first chamber is provided in the shell, and the two opposite end surfaces of the first chamber along the length direction are respectively set as a first end surface and a second end surface; the telescopic component includes a piston and a power spring; the piston is slidably provided in the first chamber, the rope hole is provided on the first end surface, and one end of the cable is connected to the end surface of the piston facing the rope hole; the power spring is sleeved on the rope, and the two ends of the power spring are respectively connected to the end surface of the piston facing the rope hole and the first end surface, and the limit assembly is against the end surface of the piston away from the rope hole to limit the power spring to a compressed state.

[0009] In some embodiments of the present application, the telescopic assembly further includes a buffer pad, and the buffer pad is disposed on the second end surface.

[0010] In some embodiments of the present application, a second chamber is provided in the shell, and the opposite end faces of the second chamber along the length direction are respectively set as a third end face and a fourth end face, and the third end face is provided with an opening connected to the first chamber; the limit assembly includes an electromagnetic switch, a return spring and a lock tongue; the electromagnetic switch is arranged on one side of the second chamber close to the fourth end face; the two ends of the return spring are respectively connected to the electromagnetic switch and one end of the lock tongue, and the other end of the lock tongue extends from the opening and rests on the end face of the piston.

[0011] In some embodiments of the present application, a second chamber is provided in the shell, and two opposite end surfaces of the second chamber along the length direction are respectively set as a third end surface and a fourth end surface, and the third end surface is provided with an opening communicating with the first chamber; the limit assembly includes a fixed shell, an explosive part, a trigger line, a U-shaped movable plate, a compression spring, a sealing ring and a locking tongue; the fixed shell is arranged at a predetermined position in the second chamber, and the explosive part is placed in the fixed shell; one end of the trigger line is connected to the explosive part, and the other end passes through the shell and is connected to the control assembly; a side opening is provided on the side wall of the fixed shell facing the fourth end surface, one end of the U-shaped movable plate is movably arranged at the side opening, the sealing ring is arranged between the inner surface of the fixed shell and the outer surface of the U-shaped movable plate, the other end of the U-shaped movable plate is connected to one end of the locking tongue, and the other end of the locking tongue extends from the opening and abuts against the end surface of the piston; one end of the compression spring is connected to the side wall of the U-shaped movable plate facing the fourth end surface, and the other end is connected to the fourth end surface.

[0012] In some embodiments of the present application, the first chamber is disposed on one side of the shell along the length direction of the shell, and the second chamber is perpendicular to the first chamber.

[0013] In some embodiments of the present application, the locking tongue includes an abutment portion and a connecting portion; the abutment portion includes an inclined surface, a bottom surface and a straight surface connected in sequence; the inclined surface is inclined toward the piston side, the bottom surface abuts against the end surface of the piston, and the straight surface is connected to the connecting portion; the height of the straight surface is less than or equal to the height of the opening; the height of the connecting portion is greater than the height of the opening.

[0014] In some embodiments of the present application, a pulley is provided on the side of the piston close to the second chamber, and the rotation direction of the pulley is toward the locking tongue.

[0015] In some embodiments of the present application, a protective hose is further included; the protective hose is sleeved on the pull cable, one end of the protective hose is connected to the shell and the rope hole at corresponding positions, and the other end thereof has a predetermined distance from the pull ring, and the predetermined distance is greater than the movement distance of the telescopic assembly.

[0016] In some embodiments of the present application, an operating screen assembly is also included; the operating screen assembly is arranged on the outer surface of the shell and is electrically connected to the control assembly.

[0017] Compared with the prior art, the automatic starting device for a backup parachute according to the embodiment of the present invention has the following beneficial effects:

[0018] An embodiment of the present invention provides an automatic starting device for a backup parachute. Through the cooperation of a control component, a telescopic component and a limit component, the backup parachute can be automatically opened when the parachutist is unable to open the parachute independently, thereby saving the life of the parachutist and reducing casualties. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a front view of a certain model of a backup parachute in the prior art.

[0021] Figure 2 It is a rear view of a certain model of a backup parachute in the prior art.

[0022] Figure 3 It is a schematic diagram of the internal structure of the automatic starting device of the backup parachute according to an embodiment of the present invention.

[0023] Figure 4 Schematic diagram of the internal structure of the housing 1.

[0024] Figure 5 It is a structural diagram of an explosion-type limit stop assembly.

[0025] Figure 6 It is a structural diagram of a lock tongue.

[0026] Figure 7 The figure is a front view structural schematic diagram of an automatic starting device for a backup parachute according to an embodiment of the present invention.

[0027] Figure 8 The invention is a schematic structural diagram of an automatic starting device of a backup parachute installed on a backup parachute.

[0028] In the figure, 1, shell; 11, rope hole; 12, first chamber; 121, first end face; 122, second end face; 13, second chamber; 131, third end face; 132, fourth end face; 133, opening; 2, belt ring; 3, telescopic assembly; 31, piston; 32, power spring; 33, roller; 34, buffer pad; 4, limit assembly; 41, lock tongue; 411, 4111, inclined surface; 4112, bottom surface; 4113, straight surface; abutment portion; 412, connecting portion; 42, electromagnetic switch; 43, reset spring; 44, fixed shell; 441, side opening; 45, explosive part; 46, trigger line; 47, U-shaped movable plate; 48, compression spring; 49, sealing ring; 5, cable; 6, pull ring; 7, control assembly; 8, protective hose; 9, operation screen assembly. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “top” and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] like Figure 3The figure is a schematic diagram of the internal structure of an automatic starting device for a backup parachute according to a preferred embodiment of an embodiment of the present invention. The automatic starting device for a backup parachute mainly includes a shell 1, a belt ring 2, a telescopic assembly 3, a limit assembly 4, a pull cable 5, a pull ring 6 and a control assembly 7. A belt ring 2 is provided on the side of the shell 1, and the belt ring 2 is used to connect the automatic starting device with the backup parachute. Specifically, the elastic belt of the backup parachute bag passes through the belt ring 2 and is fastened, so that the automatic starting device can be fixed on the bag. The present application does not limit the specific connection structure between the automatic starting device and the backup parachute. In some embodiments of the present application, in order to make the connection between the automatic starting device and the backup parachute more secure, a plurality of belt rings 2 can be symmetrically arranged, such as in the present embodiment. Figure 1 In the embodiment, there are four belt rings 2, which are symmetrically distributed on the upper and lower sides of the housing 1. The telescopic component 3 is arranged in the housing 1, and a cable hole 11 is arranged on the housing 1. One end of the cable 5 is connected to the telescopic component 3, and the other end extends out of the housing 1 from the cable hole 11 and is provided with a pull ring 6, which is used to connect with the parachute opening rope of the backup parachute. The limit component 4 is arranged in the housing 1 to limit the telescopic component 3 in a compressed state. The control component 7 is arranged in the housing 1 and is electrically connected to the limit component 4, which is used to detect the state of the device and the personnel and control the limit component 4 to release the limit on the telescopic component according to the predetermined instruction to pull the cable 5 into the housing 1. The control component 7 specifically includes a power supply 71 and a PCB circuit board, wherein the PCB circuit board integrates a microcontroller unit MCU, a memory, various required sensors such as an air pressure sensor, an acceleration sensor, a geomagnetic sensor, a temperature sensor, a gyroscope, a satellite positioning module and other necessary components and circuits. Through the data measured by the sensor, the microcontroller unit MCU can calculate the current state of the device and the personnel status and other information, and control the device action accordingly. The entire PCB circuit board space is sealed and waterproof, and senses the external air pressure through a waterproof and breathable membrane layer.

[0034] The working principle of the automatic starting device of the backup parachute provided by the present invention is as follows:

[0035] See also Figure 8 The automatic starting device is fixed on the reserve parachute before use. The specific fixing method is to pass the elastic belt of the reserve parachute through the belt rings 2 on both sides of the shell 1 to fix it on the reserve parachute bag, and the pull ring 6 extends into the parachute bag to connect with the parachute opening rope.

[0036] When the automatic start device is fixed on the backup parachute and is working, the control component 7 continuously detects the status of the device and the personnel. When the control component 7 detects that the current parachutist is in a dangerous situation (such as the main parachute is not opened, and the parachutist's descent speed is still high after falling below a certain height), the trigger device starts the specified (i.e., predetermined instruction) and controls the limit component 4 to release the restriction on the telescopic component 3, and the telescopic component 3 changes from a compressed state to an extended state, pulling the cable 5 toward the inside of the shell 1, the cable 5 pulls the pull ring 6, and the pull ring 6 pulls the parachute opening cable of the backup parachute, thereby opening the backup parachute.

[0037] In some embodiments of this application, see Figure 4 , a first chamber 12 is provided in the housing 1, and the two opposite end surfaces of the first chamber 12 along the length direction are respectively set as a first end surface 121 and a second end surface 122. The telescopic assembly 3 includes a piston 31 and a power spring 32. The piston 31 is slidably disposed in the first chamber 12, the cable hole 11 is disposed at the first end surface 121, and one end of the cable 5 is connected to the end surface of the piston 31 facing the cable hole 11. The power spring 32 is sleeved on the cable 5, and the two ends of the power spring 32 are respectively connected to the end surface of the piston 31 facing the cable hole 11 and the first end surface 121, and the limit assembly 4 is against the end surface of the piston 31 away from the cable hole 11 to limit the power spring 32 in a compressed state.

[0038] In some embodiments of this application, see Figure 4 The telescopic assembly 3 further includes a buffer pad 34, which can be arranged on the second end surface 122 through a fixing component. The buffer pad 34 is preferably made of rubber, and the purpose of arranging the buffer pad 34 is to reduce the impact force of the power spring 32.

[0039] In some embodiments of this application, see Figure 4 A second chamber 13 is provided in the shell 1 , and two opposite end surfaces of the second chamber 13 along the length direction are respectively set as a third end surface 131 and a fourth end surface 132 , and the third end surface 131 is provided with an opening 133 communicating with the first chamber 12 .

[0040] The present application proposes two preferred structures of the limit assembly 4, which are described in detail below.

[0041] The first is a piston-type limit structure, see Figure 4 The piston type limit assembly includes an electromagnetic switch 42, a return spring 43 and a lock tongue 41. The electromagnetic switch 42 is arranged on one side of the second chamber 13 near the fourth end face 432. The electromagnetic switch 42 can convert electrical energy into magnetic force under the control of the control assembly 7 through the electromagnetic conversion principle to control the movement of the magnetic member lock tongue 41. The two ends of the return spring 43 are respectively connected to one end of the electromagnetic switch 42 and the lock tongue 41, and the other end of the lock tongue 41 extends from the opening 133 to abut against the end face of the piston 31.

[0042] When the control assembly 7 determines that the parachutist is in a dangerous state, the control circuit outputs a pulse current to the electromagnetic switch 42. Under the action of the pulse large current, the electromagnetic switch 42 generates a strong magnetic force, overcomes the force of the reset spring 43, and quickly pulls the lock tongue 41 backward, thereby releasing the restriction on the piston 31. The power spring 32 changes from a compressed state to an extended state, pulling the cable 5 toward the inside of the housing 1, and the cable 5 pulls the pull ring 6, and the pull ring 6 pulls the parachute opening cable of the backup parachute, thereby opening the backup parachute. The sealing ring 49 can prevent the gas generated by the explosion from leaking.

[0043] The second type is an explosive limit structure, see Figure 5 The explosive limiting assembly includes a fixed shell 44, an explosive member 45, a trigger line 46, a U-shaped movable plate 47, a compression spring 48, a sealing ring 49 and a locking tongue 41. The fixed shell 44 is arranged at a predetermined position in the second chamber 13, and the explosive member 45 is placed in the fixed shell 44. One end of the trigger line 46 is connected to the explosive member 45, and the other end passes through the housing 1 and is connected to the control assembly 7. A side opening 441 is provided on the side wall of the fixed shell 44 facing the fourth end face 132, one end of the U-shaped movable plate 47 is movably arranged at the side opening 441, the sealing ring 49 is arranged between the inner surface of the fixed shell 44 and the outer surface of the U-shaped movable plate 47, the other end of the U-shaped movable plate 47 is connected to one end of the locking tongue 41, and the other end of the locking tongue 41 extends from the opening 133 to abut on the end face of the piston 31. One end of the compression spring 48 is connected to the side wall of the U-shaped movable plate 47 facing the fourth end face 132, and the other end is connected to the fourth end face 132.

[0044] When the control assembly 7 determines that the parachutist is in a dangerous state, the control circuit outputs a pulse current, which passes through the trigger line 46 to detonate the explosive 45 (which can be a pyrotechnic explosive), and a large amount of gas is generated at the moment of the explosion, so that a high pressure is generated in the cavity of the fixed shell 44, and the U-shaped movable plate 47 is quickly pushed to overcome the force of the compression spring 48 to move backward, thereby driving the lock tongue 41 to move backward, thereby releasing the restriction on the piston 31, and the power spring 32 changes from a compressed state to an extended state, pulling the cable 5 into the shell 1, and the cable 5 pulls the pull ring 6, and the pull ring 6 pulls the parachute opening cable of the backup parachute, so that the backup parachute is opened. The sealing ring 49 can prevent the gas generated by the explosion from leaking.

[0045] In some embodiments of this application, see Figure 1 The first chamber 12 is arranged on one side of the housing 1 along the length direction of the housing 1, and the second chamber 13 is perpendicular to the first chamber 12. Such an arrangement enables the limiting component 4 to better limit or release the telescopic component 3, reducing the situation of false triggering or dumb firing.

[0046] In some embodiments of this application, see Figure 6The locking tongue 41 includes an abutting portion 411 and a connecting portion 412. The abutting portion 411 is connected in sequence to an inclined surface 4111, a bottom surface 4112 and a straight surface 4113, and the cross-sectional shape of the abutting portion 411 is a right triangle or as shown in FIG. Figure 6 The inclined surface 4111 is inclined toward the piston 31, the bottom surface 4112 is in contact with the end surface of the piston 31, and the straight surface 4113 is connected to the connecting portion 412. The height of the straight surface 4113 is less than or equal to the height of the opening 133, and the height of the connecting portion 412 is greater than the height of the opening 133. This arrangement enables the opening 133 to limit the locking tongue 41, thereby preventing the locking tongue 41 from extending too much and reducing the trigger sensitivity.

[0047] In some embodiments of this application, see Figure 4 A pulley 34 is provided on the side of the piston 31 close to the second chamber 13, and the rotation direction of the pulley 34 is toward the locking tongue 41. After the automatic starting device of the backup parachute is used, the power spring 32 is in an extended state, and the power spring 32 needs to be restored to the original compressed state before the automatic starting device can work next time. During recovery, the limit assembly 4 can be not started, and the piston 31 can be directly pulled. When the pulley 34 moves to the inclined surface of the locking tongue 41, a thrust will be generated on the locking tongue 41, and the locking tongue 41 will be directly pushed into the opening 133 until the pulley 34 completely leaves the inclined surface. The locking tongue 41 will pop out from the opening 133 again, and at this time it just abuts against the piston 31, completing the recovery setting. Such a design is convenient for the recovery of the automatic starting device after use, and there is no need to start the limit assembly 4, which effectively saves power and is simple to operate.

[0048] In some embodiments of this application, see Figure 1 , and also includes a protective hose 8, which is preferably a stainless steel hose. The protective hose 8 is sleeved on the cable 5, one end of the protective hose 8 is connected to the housing 1 at a position corresponding to the cable hole 11, and the other end of the protective hose 8 is at a predetermined distance from the pull ring 6, which is greater than the movement distance of the telescopic assembly 3. The protective hose 8 can effectively protect the cable 5 and provide a movement channel for it to prevent it from being stuck by the outside. The tail end of the protective hose 8 can be fixed below the umbrella opening pull ring bag 013.

[0049] In some embodiments of this application, see Figure 7 , and also includes an operating screen component 9. The operating screen component 9 is arranged on the outer surface of the housing 1 and is electrically connected to the control component 7. The operating screen component 9 may include a display screen and buttons. The display screen is a human-computer interaction interface that can display the device status and related parameter information. The buttons are used to turn on and off the machine, set the device, query information related to skydiving activities, etc. Before skydiving, the automatic start device of the backup parachute is turned on by pressing the button, and the relevant information of the device can be viewed on the display screen, and the device can also be set accordingly by pressing the button.

[0050] In summary, an embodiment of the present invention provides an automatic starting device for a backup parachute. Through the cooperation of the control component 7, the telescopic component 3 and the limit component 4, the backup parachute can be automatically opened when the parachutist is unable to open the parachute independently, thereby saving the life of the parachutist and reducing casualties.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic starting device for a backup parachute, characterized in that: It includes a shell, a belt ring, a telescopic component, a limit component, a cable, a pull ring and a control component; The belt ring is provided on the side of the shell; The telescopic assembly is arranged in the shell, a cable hole is arranged on the shell, one end of the cable is connected to the telescopic assembly, and the other end extends out of the shell from the cable hole and is provided with the pull ring; The limiting assembly is arranged in the housing to limit the telescopic assembly to a compressed state; The control component is disposed in the housing and is electrically connected to the limit component, and is used to detect the status of the device and personnel and control the limit component to release the restriction on the telescopic component according to a predetermined instruction so as to pull the cable into the housing; A first chamber is provided in the shell, and two opposite end surfaces of the first chamber along the length direction are respectively set as a first end surface and a second end surface; The telescopic assembly includes a piston and a power spring; the piston is slidably disposed in the first chamber, the cable hole is disposed on the first end surface, and one end of the cable is connected to the end surface of the piston facing the cable hole; the power spring is sleeved on the cable, and the two ends of the power spring are respectively connected to the end surface of the piston facing the cable hole and the first end surface, and the limiting assembly is against the end surface of the piston away from the cable hole to limit the power spring in a compressed state; A second chamber is provided in the shell, and the opposite end faces of the second chamber along the length direction are respectively set as a third end face and a fourth end face, and the third end face is provided with an opening connected to the first chamber; the limiting assembly includes a locking tongue and a spring, and the two ends of the spring are respectively connected to the fourth end face and one end of the locking tongue, and the other end of the locking tongue extends from the opening and abuts against the end face of the piston.

2. The automatic starting device for a backup parachute according to claim 1, characterized in that: The telescopic assembly further includes a buffer pad, and the buffer pad is arranged on the second end surface.

3. The automatic starting device for a backup parachute according to claim 1, characterized in that: The limit assembly includes an electromagnetic switch; the spring is defined as a return spring, and the electromagnetic switch is arranged on one side of the second chamber close to the fourth end face; the two ends of the return spring are respectively connected to the electromagnetic switch and one end of the locking tongue, and the other end of the locking tongue extends from the opening and rests on the end face of the piston.

4. The automatic starting device for a backup parachute according to claim 1, characterized in that: The limiting assembly includes a fixed shell, an explosive part, a trigger wire, a U-shaped movable plate, and a sealing ring; the spring is defined as a compression spring, the fixed shell is arranged at a predetermined position in the second chamber, and the explosive part is placed in the fixed shell; one end of the trigger wire is connected to the explosive part, and the other end passes through the shell and is connected to the control assembly; the side wall of the fixed shell facing the fourth end face is provided with a side opening, one end of the U-shaped movable plate is movably arranged at the side opening, the sealing ring is arranged between the inner surface of the fixed shell and the outer surface of the U-shaped movable plate, the other end of the U-shaped movable plate is connected to one end of the locking tongue, and the other end of the locking tongue extends from the opening and rests on the end face of the piston; one end of the compression spring is connected to the side wall of the U-shaped movable plate facing the fourth end face, and the other end is connected to the fourth end face.

5. The automatic starting device for a backup parachute according to claim 3 or 4, characterized in that: The first chamber is arranged at one side of the interior of the shell along the length direction of the shell, and the second chamber is perpendicular to the first chamber.

6. The automatic activation device for a backup parachute according to claim 5, characterized in that: The locking tongue includes an abutting portion and a connecting portion; the abutting portion includes an inclined surface, a bottom surface and a straight surface connected in sequence; the inclined surface is inclined toward the piston side, the bottom surface abuts against the end surface of the piston, and the straight surface is connected to the connecting portion; the height of the straight surface is less than or equal to the height of the opening; the height of the connecting portion is greater than the height of the opening.

7. The automatic activation device for a backup parachute according to claim 6, characterized in that: A pulley is provided on the side of the piston close to the second chamber, and the rotation direction of the pulley is toward the locking tongue.

8. The automatic activation device for a backup parachute according to claim 1, characterized in that: It also includes a protective hose; the protective hose is sleeved on the cable, one end of the protective hose is connected to the shell and the corresponding position of the cable hole, and the other end has a predetermined distance with the pull ring, and the predetermined distance is greater than the movement distance of the telescopic component.

9. The automatic activation device for a backup parachute according to claim 1, characterized in that: It also includes an operating screen assembly; the operating screen assembly is arranged on the outer surface of the shell and is electrically connected to the control assembly.

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