Explosive activation device, emergency ejection seat and aircraft

Abstract

The present application relates to a kind of explosion activation device, emergency ejection seat and aircraft, wherein, explosion activation device includes electrically conductive shell and power supply, electrically conductive shell is slidably connected with actuator inside, actuator is provided with plunger cavity, plunger cavity is slidably connected with plunger inside, limiting ball is slidably connected on actuator, actuator and plunger are connected or separated by limiting ball, electrically conductive shell is provided with insulating base, insulating base is provided with electrical contact point, one end of plunger close to electrical contact point is contacted or separated with electrical contact point, electrically conductive shell, actuator, limiting ball and plunger are all electrically conductive components, the anode of power supply is connected with electrically conductive shell, the cathode of power supply is connected with electrical contact point.The explosion activation device of the present application only needs to pull actuator to change the connection state between actuator and plunger, to realize activation function, simplify the structure of explosion activation device.

Description

Technical Field

[0001] This invention relates to the field of explosion activation technology, and in particular to an explosion activation device, an emergency ejection seat, and an aircraft. Background Technology

[0002] Explosive activation devices (OEVs) are used to initiate or control explosive devices, commonly found in military and explosives engineering fields. These devices are designed with high precision, reliability, and safety to ensure no accidents occur during the detonation or control of explosive devices. In military applications, OEVs are typically used to remotely detonate military bombs, mines, artillery shells, and demolition devices. This allows operators to maintain a relatively safe distance and reduces operational risks. In industrial blasting applications, OEVs are used to control the timing and effect of blasts to ensure safe demolition and structural removal; OEVs must be designed with high reliability and safety to prevent explosions. In engineering emergency rescue applications, OEVs are often used as safety protection devices in emergency situations, such as car airbags, aircraft ejection seats, and parachute deployment mechanisms.

[0003] In engineering emergency rescue applications, existing explosion activation devices generally include components such as pull ring steel cables, cranks, and rocker arms. These components form a crank-connecting rod structure, which then activates the explosion device. Such explosion activation devices have a relatively complex structure, which affects their control performance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an explosion activation device, an emergency ejection seat, and an aircraft, which can simplify the structure of the explosion activation device.

[0005] To achieve the above objectives, the present invention provides an explosion activation device, comprising a conductive housing and a power supply. An actuator is slidably connected within the conductive housing. A plunger cavity is provided within the actuator, and a plunger is slidably connected within the plunger cavity. A limiting ball is slidably connected to the actuator. The actuator and the plunger are engaged or disengaged by the limiting ball. An insulating base is provided on the conductive housing, and an electrical contact point is provided on the insulating base. One end of the plunger near the electrical contact point is in contact with or disengaged from the electrical contact point. The conductive housing, actuator, limiting ball, and plunger are all conductive components. The positive terminal of the power supply is connected to the conductive housing, and the negative terminal of the power supply is connected to the electrical contact point.

[0006] In one embodiment of the present invention, a first sealing ring is further included. A handle cavity is provided inside the conductive housing. A pull ring handle is slidably connected inside the handle cavity. The pull ring handle and the inner wall of the handle cavity are interference-fitted through the first sealing ring. The pull ring handle is connected to the actuator.

[0007] In one embodiment of the present invention, a second sealing ring is further included. The pull ring handle is provided with an installation cavity, and the actuator is provided with a connecting end. The connecting end and the installation cavity are interference-fitted through the second sealing ring.

[0008] In one embodiment of the present invention, a built-in pull rod is further included. The pull ring handle is provided with a sliding cavity of a preset length and a first through hole. The sliding cavity is connected to the first through hole. The actuator is provided with a second through hole, which is connected to the plunger cavity. The built-in pull rod passes through the sliding cavity, the first through hole, the second through hole, and the plunger cavity. One end of the built-in pull rod is provided with a first flange, and the other end of the built-in pull rod is provided with a second flange. The first flange is disposed in the sliding cavity, and the diameter of the first flange is larger than the diameter of the first through hole. The second flange is disposed in the plunger cavity, and the diameter of the second flange is larger than the diameter of the second through hole.

[0009] In one embodiment of the present invention, a third sealing ring is further included. An execution cavity is provided inside the conductive housing. The execution cavity is connected to the handle cavity. The actuator is slidably connected to the execution cavity. The actuator and the inner wall of the execution cavity are interference-fitted through the third sealing ring.

[0010] In one embodiment of the present invention, the actuator is provided with a sliding groove, the limiting ball is slidably connected in the sliding groove, the plunger is provided with a limiting groove at one end near the actuator, the limiting ball is simultaneously engaged in the sliding groove and the limiting groove, the sliding direction of the limiting ball in the sliding groove is towards or away from the limiting groove, the point on the limiting ball closest to the axis of the actuator is the target point, the minimum distance between the target point and the inner wall of the plunger cavity is the first distance, the radial distance between the inner wall of the actuator cavity and the inner wall of the handle cavity is the second distance, the second distance is greater than the first distance, and the inner diameter of the handle cavity is greater than the inner diameter of the actuator cavity.

[0011] In one embodiment of the present invention, a spring cavity is provided on the conductive outer shell, a positioning flange is provided between the actuating cavity and the spring cavity, a third through hole is provided on the positioning flange, the third through hole connects the spring cavity and the actuating cavity, a plunger passes through the plunger cavity, the third through hole and the spring cavity, an annular cavity is formed between the plunger and the spring cavity, a compression spring is provided in the annular cavity, a limiting plate is formed on one end of the plunger near the electrical contact point, one end of the compression spring abuts against the end face of the limiting plate away from the electrical contact point, and the other end of the compression spring abuts against the end face of the positioning flange away from the actuator, the end face of the limiting plate near the electrical contact point is in contact with or separate from the electrical contact point.

[0012] In one embodiment of the present invention, the insulating base is provided with a plurality of electrical contact points, which are redundant with each other.

[0013] On the other hand, an emergency ejection seat is provided, including the aforementioned explosion activation device, on which an explosive device is connected.

[0014] On the other hand, an aircraft is provided, including the aforementioned emergency ejection seat.

[0015] The technical solution of the present invention has the following advantages over the prior art: The explosion activation device of this invention connects the actuator to the plunger, and the actuator and plunger are switched between a locked state and a separated state via a limiting ball. When the actuator and plunger are locked, the end of the plunger near the electrical contact point is separated from the electrical contact point, the positive and negative terminals of the power supply are disconnected, and the explosion activation device is in an inactive state and will not trigger an explosion signal. When the actuator and plunger are separated, the end of the plunger near the electrical contact point is in contact with the electrical contact point, the positive and negative terminals of the power supply are short-circuited, and the explosion activation device is in an active state, triggering an explosion signal and thus activating the explosion device. Therefore, this application only requires pulling the actuator to change the connection state between the actuator and the plunger to achieve the activation function, eliminating the need for the complex crank-connecting rod structure of the prior art as the activation device, simplifying the structure of the explosion activation device, while still ensuring the reliability of the activation device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the explosion activation device of the present invention; Figure 2 This is a half-sectional structural diagram of the explosion activation device of the present invention; Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a schematic diagram of the explosion activation device and the insulating base of the present invention; Figure 5 This is a schematic diagram of the pull ring handle of the explosion activation device of the present invention; Figure 6 This is a schematic diagram of the actuator of the explosion activation device of the present invention; Figure 7 This is a schematic diagram of the built-in pull rod of the explosion activation device of the present invention; Figure 8 This is a schematic diagram of the plunger structure of the explosion activation device of the present invention; Figure 9 This is a schematic diagram of the trapezoidal limiting groove on the plunger of the explosion activation device of the present invention; Figure 10 This is a schematic diagram of the rectangular limiting groove on the plunger of the explosion activation device of the present invention; Figure 11 This is a schematic diagram of the circular limiting groove on the plunger of the explosion activation device of the present invention; Figure 12 This is a structural schematic diagram of the first and second distances of the explosion activation device of the present invention; Figure 13 This is a schematic diagram of the actuator and plunger phase separation structure of the explosion activation device of the present invention.

[0018] Explanation of reference numerals on the accompanying drawings: 1. Conductive housing; 2. Power supply; 3. Actuator; 4. Plunger cavity; 5. Plunger; 6. Limiting ball; 7. Insulating base; 8. Electrical contact point; 9. First sealing ring; 10. Handle cavity; 11. Pull ring handle; 12. Second sealing ring; 13. Mounting cavity; 14. Connecting end; 15. Built-in pull rod; 16. Sliding cavity; 17. First through hole; 18. Second through hole; 19. First flange; 20. Second flange; 21. Third sealing ring; 22. Actuating cavity; 23. Sliding groove; 24. Limiting groove; 25. Spring cavity; 26. Positioning flange; 27. Third through hole; 28. Annular cavity; 29. ​​Compression spring; 30. Limiting plate; 31. Handle. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0020] Example 1 Reference Figures 1-13 As shown, the explosion activation device of the present invention includes a conductive housing 1 and a power supply 2. An actuator 3 is slidably connected inside the conductive housing 1. A plunger cavity 4 is provided inside the actuator 3. A plunger 5 is slidably connected inside the plunger cavity 4. A limiting ball 6 is slidably connected to the actuator 3. The actuator 3 and the plunger 5 are engaged or disengaged by the limiting ball 6. An insulating base 7 is provided on the conductive housing 1. An electrical contact point 8 is provided on the insulating base 7. One end of the plunger 5 near the electrical contact point 8 is in contact with or disengaged from the electrical contact point 8. The conductive housing 1, actuator 3, limiting ball 6, and plunger 5 are all conductive components. The positive terminal of the power supply 2 is connected to the conductive housing 1, and the negative terminal of the power supply 2 is connected to the electrical contact point 8.

[0021] The explosion activation device of this application includes a conductive housing 1 and a power supply 2, such as Figure 1 and Figure 2 As shown, an actuator 3 is slidably connected inside the conductive housing 1. Therefore, the actuator 3 can slide from inside the conductive housing 1 to outside the conductive housing 1. The actuator 3 acts as the start switch for the explosion activation device, which in turn acts as the start switch for the explosion device. A plunger cavity 4 is provided inside the actuator 3, and a plunger 5 is slidably connected inside the plunger cavity 4. Therefore, the plunger 5 can slide relative to the actuator 3, and can slide out of the plunger cavity 4 on the actuator 3. A limit ball 6 is slidably connected to the actuator 3. The actuator 3 and the plunger 5 are engaged or disengaged through the limit ball 6. The engaged state between the actuator 3 and the plunger 5 is as follows: Figure 2 and Figure 3 As shown, the actuator 3 and the plunger 5 are in a separated state as follows: Figure 13As shown. The default state of the explosion activation device is that the actuator 3 and the plunger 5 are engaged. In an emergency, the driver manually pulls the actuator 3 to disengage it from the conductive housing 1. Since the actuator 3 and the plunger 5 are engaged, the actuator 3 will move the plunger 5. When the actuator 3 disengages from the conductive housing 1, the limiting ball 6 slides on the actuator 3, causing the plunger 5 to disengage from the plunger cavity 4 on the actuator 3. That is, the actuator 3 and the plunger 5 are in a separated state. An insulating base 7 is provided on the conductive housing 1, and an electrical contact point 8 is provided on the insulating base 7. One end of the plunger 5 near the electrical contact point 8 is in contact with or separate from the electrical contact point 8. Specifically, when the actuator 3 and the plunger 5 are engaged, the end of the plunger 5 near the electrical contact point 8 is separated from the electrical contact point 8; when the actuator 3 and the plunger 5 are separated, the end of the plunger 5 near the electrical contact point 8 is in contact with the electrical contact point 8. Furthermore, the conductive housing 1, actuator 3, limit ball 6, and plunger 5 are all conductive components, thus allowing for electrical connection between them. The positive terminal of the power supply 2 is connected to the conductive housing 1, and the negative terminal is connected to the electrical contact point 8. When the actuator 3 and plunger 5 are engaged, the end of the plunger 5 near the electrical contact point 8 is separated from it, disconnecting the positive and negative terminals of the power supply 2. The explosion activation device remains inactive and will not trigger an explosion signal. When the actuator 3 and plunger 5 are disengaged, the end of the plunger 5 near the electrical contact point 8 is in contact with it, short-circuiting the positive and negative terminals of the power supply 2. The explosion activation device is activated and will trigger an explosion signal, thereby activating the explosion device.

[0022] The explosion activation device of this application has an actuator 3 connected to a plunger 5, and the actuator 3 and the plunger 5 are switched between a locked state and a separated state via a limiting ball 6. When the actuator 3 and the plunger 5 are locked, the end of the plunger 5 near the electrical contact point 8 is separated from the electrical contact point 8, the positive and negative terminals of the power supply 2 are disconnected, and the explosion activation device is in an inactive state and will not trigger an explosion signal. When the actuator 3 and the plunger 5 are separated, the end of the plunger 5 near the electrical contact point 8 is in contact with the electrical contact point 8, the positive and negative terminals of the power supply 2 are short-circuited, and the explosion activation device is in an active state, triggering an explosion signal and thus triggering the explosion device. Therefore, this application only requires pulling the actuator 3 to change the connection state between the actuator 3 and the plunger 5 to achieve the activation function, eliminating the need for the complex crank-connecting rod structure of the prior art as the activation device, simplifying the structure of the explosion activation device, while still ensuring the reliability of the activation device.

[0023] In one embodiment, a first sealing ring 9 is also included. A handle cavity 10 is provided inside the conductive housing 1. A pull ring handle 11 is slidably connected inside the handle cavity 10. The pull ring handle 11 and the inner wall of the handle cavity 10 are interference-fitted through the first sealing ring 9. The pull ring handle 11 is connected to the actuator 3.

[0024] like Figure 3 and Figure 5 As shown, the explosion activation device also includes a first sealing ring 9, preferably an O-ring. A handle cavity 10 is provided inside the conductive housing 1, and a pull ring handle 11 is slidably connected inside the handle cavity 10. Therefore, the pull ring handle 11 can slide relative to the conductive housing 1 within the handle cavity 10. Furthermore, the pull ring handle 11 facilitates human-machine interaction between the driver and the explosion activation device, making emergency operation easier for the driver compared to direct operation of the actuator 3. Preferably, a handle portion 31 is provided on the pull ring handle 11, and the handle portion 31 has a D-shaped structure. The pull ring handle 11 is interference-fitted with the conductive housing 1 via a first sealing ring 9. This means the pull ring handle 11 is interference-fitted with the inner wall of the handle cavity 10 via the first sealing ring 9. Therefore, the first sealing ring 9 is compressed between the pull ring handle 11 and the conductive housing 1. This compression creates friction between the pull ring handle 11 and the conductive housing 1. The magnitude of this friction can be controlled by adjusting the compression level of the first sealing ring 9. This friction can be preset between the pull ring handle 11 and the conductive housing 1, preventing the pull ring handle 11 from easily detaching from the conductive housing 1 in certain scenarios and affecting the driver's operation, thus improving the safety of the explosion activation device. The pull ring handle 11 is connected to the actuator 3, allowing the driver to pull the actuator 3 using the pull ring handle 11.

[0025] In one embodiment, a second sealing ring 12 is also included. The pull ring handle 11 is provided with a mounting cavity 13, and the actuator 3 is provided with a connecting end 14. The connecting end 14 and the mounting cavity 13 are interference-fitted through the second sealing ring 12.

[0026] like Figure 3 and Figure 6As shown, the explosion activation device also includes a second sealing ring 12, preferably an O-ring. A mounting cavity 13 is provided on the pull ring handle 11, and a connecting end 14 is provided on the actuator 3. The connecting end 14 is installed inside the mounting cavity 13, and the connecting end 14 is interference-fitted with the inner wall of the mounting cavity 13 via the second sealing ring 12. That is, the actuator 3 and the pull ring handle 11 are interference-fitted via the second sealing ring 12. Therefore, the second sealing ring 12 is in a compressed state between the actuator 3 and the pull ring handle 11. The compressed second sealing ring 12 creates friction between the actuator 3 and the pull ring handle 11. The magnitude of this friction can be controlled by setting the compression amount of the second sealing ring 12. Therefore, a preset friction can be achieved between the actuator 3 and the pull ring handle 11. This friction prevents the pull ring handle 11 from easily detaching from the conductive housing 1 and the actuator 3, preventing the pull ring handle 11 from detaching from the conductive housing 1 and the actuator 3 in certain scenarios and affecting the driver's operation, thus improving the safety of the explosion activation device. Furthermore, when the pull ring handle 11 needs to slide out of the conductive housing 1, it is necessary to overcome the frictional force generated between the pull ring handle 11 and the handle cavity 10 through the first sealing ring 9, as well as the frictional force generated between the actuator 3 and the pull ring handle 11 through the second sealing ring 12.

[0027] In one embodiment, a built-in pull rod 15 is also included. The pull ring handle 11 is provided with a sliding cavity 16 of a preset length and a first through hole 17. The sliding cavity 16 is connected to the first through hole 17. The actuator 3 is provided with a second through hole 18, which is connected to the plunger cavity 4. The built-in pull rod 15 passes through the sliding cavity 16, the first through hole 17, the second through hole 18, and the plunger cavity 4. One end of the built-in pull rod 15 is provided with a first flange 19, and the other end of the built-in pull rod 15 is provided with a second flange 20. The first flange 19 is located in the sliding cavity 16 at the end away from the actuator 3, and the diameter of the first flange 19 is larger than the diameter of the first through hole 17. The second flange 20 is located in the plunger cavity 4 at the end near the pull ring handle 11, and the diameter of the second flange 20 is larger than the diameter of the second through hole 18.

[0028] like Figure 3 and Figure 7As shown, the explosion activation device also includes a built-in pull rod 15. Due to the presence of the built-in pull rod 15, when the pull ring handle 11 is pulled, the pull ring handle 11 first undergoes a period of free travel until it contacts the built-in pull rod 15, causing the actuator 3 to move upward. The free travel design at the front of the pull ring handle 11 can effectively prevent accidental activation during parking or improper operation, thereby improving the safety of the explosion activation device. Specifically, the pull ring handle 11 is provided with a sliding cavity 16 of a preset length and a first through hole 17. The preset length of the sliding cavity 16 is designed to match the length of the free travel at the front of the pull ring handle 11. The sliding cavity 16 and the first through hole 17 are connected so that the built-in pull rod 15 can pass through both the sliding cavity 16 and the first through hole 17 simultaneously, and the built-in pull rod 15 can slide within the sliding cavity 16 and the first through hole 17. The actuator 3 is provided with a second through hole 18, which is connected to the plunger cavity 4 so that the built-in pull rod 15 can pass through the sliding cavity 16, the first through hole 17, the second through hole 18 and the plunger cavity 4 at the same time, and the built-in pull rod 15 can slide in the sliding cavity 16, the first through hole 17, the second through hole 18 and the plunger cavity 4. To enable the pull ring handle 11 to pull the actuator 3 via the built-in pull rod 15 after the initial idle stroke, the two ends of the built-in pull rod 15 form a first flange 19 and a second flange 20, respectively. The first flange 19 is disposed in the sliding cavity 16. Preferably, the first flange 19 is disposed at the end of the sliding cavity 16 away from the actuator 3, and the diameter of the first flange 19 is larger than the diameter of the first through hole 17, so that the pull ring handle 11 can drive the built-in pull rod 15 to move via the first flange 19 on the built-in pull rod 15 after the initial idle stroke. The second flange 20 is disposed in the plunger cavity 4. Preferably, the second flange 20 is disposed at the end of the plunger cavity 4 near the pull ring handle 11, and the diameter of the second flange 20 is larger than the diameter of the second through hole 18, so that the pull ring handle 11 can drive the actuator 3 to slide within the execution cavity 22 via the second flange 20 on the built-in pull rod 15 after the initial idle stroke.

[0029] In one embodiment, a third sealing ring 21 is also included. An execution cavity 22 is provided inside the conductive housing 1. The execution cavity 22 is connected to the handle cavity 10. The actuator 3 is slidably connected inside the execution cavity 22. The actuator 3 and the inner wall of the execution cavity 22 are interference-fitted through the third sealing ring 21.

[0030] like Figure 3 and Figure 6As shown, the explosion activation device also includes a third sealing ring 21, preferably an O-ring. An execution cavity 22 is provided inside the conductive housing 1. The actuator 3 is slidably connected within the execution cavity 22, and the actuator 3 is interference-fitted with the inner wall of the execution cavity 22 via the third sealing ring 21. That is, the actuator 3 and the conductive housing 1 are interference-fitted via the third sealing ring 21. Therefore, the third sealing ring 21 is in a compressed state between the actuator 3 and the conductive housing 1. The compressed third sealing ring 21 creates friction between the actuator 3 and the conductive housing 1. The magnitude of this friction can be controlled by setting the compression amount of the third sealing ring 21. Therefore, a preset friction can be achieved between the actuator 3 and the conductive housing 1. This friction prevents the actuator 3 from easily detaching from the conductive housing 1, preventing the pull ring handle 11 from pulling the actuator 3 off the conductive housing 1 via the built-in pull rod 15 in certain scenarios, thus affecting the driver's operation and improving the safety of the explosion activation device. When the actuator 3 is slid out of the conductive housing 1 by the built-in pull rod 15, it is necessary to overcome the frictional force generated between the actuator 3 and the conductive housing 1 through the third sealing ring 21.

[0031] In one embodiment, the actuator 3 is provided with a sliding groove 23, and the limiting ball 6 is slidably connected in the sliding groove 23. The plunger 5 is provided with a limiting groove 24 at one end near the actuator 3. The limiting ball 6 is simultaneously engaged in the sliding groove 23 and the limiting groove 24. The sliding direction of the limiting ball 6 in the sliding groove 23 is towards or away from the limiting groove 24. The point on the limiting ball 6 closest to the axis of the actuator 3 is the target point. The minimum distance between the target point and the inner wall of the plunger cavity 4 is the first distance. The radial distance between the inner wall of the execution cavity 22 and the inner wall of the handle cavity 10 is the second distance. The second distance is greater than the first distance. The inner diameter of the handle cavity 10 is greater than the inner diameter of the execution cavity 22.

[0032] like Figure 3 and Figure 8As shown, the actuator 3 and the plunger 5 are engaged or disengaged by a limiting ball 6. Specifically, the actuator 3 is provided with a sliding groove 23, and the limiting ball 6 is slidably connected in the sliding groove 23. The sliding groove 23 is along the radial direction of the actuator 3. In the default engaged state of the actuator 3 and the plunger 5, the limiting ball 6 is engaged in both the sliding groove 23 and the limiting groove 24, and the actuator 3 and the plunger 5 are relatively fixed. When the actuator 3 and the plunger 5 switch to the disengaged state, the limiting ball 6 slides in the sliding groove 23 in a direction away from the limiting groove 24, and the limiting ball 6 disengages from the limiting groove 24. At this time, the actuator 3 and the plunger 5 are relatively separated, and the plunger 5 can slide out of the actuator 3. Furthermore, in order for the limiting ball 6 to disengage normally from the limiting groove 24, the dimensions of the handle cavity 10, the actuator cavity 22, and the plunger cavity 4 need to be designed. The point on the limiting ball 6 closest to the axis of the actuator 3 is selected as the target point, such as... Figure 12 As shown, the minimum distance (radial distance) between the target point and the inner wall of the plunger cavity 4 is the first distance L1, and the radial distance between the inner wall of the execution cavity 22 and the inner wall of the handle cavity 10 is the second distance L2. The second distance L2 is greater than the first distance L1. This ensures that the distance the limiting ball 6 slides in the sliding groove 23 away from the limiting groove 24 is greater than the first distance L1, so that the limiting ball 6 can completely disengage from the limiting groove 24. This allows the plunger 5 to separate from the actuator 3 when the actuator 3 is disengaged from the conductive housing 1 by the built-in pull rod 15, so that the plunger 5 can contact the electrical contact point 8. In addition, the inner diameter of the handle cavity 10 is greater than the inner diameter of the execution cavity 22. The cross-section of the limiting groove 24 can be rectangular (e.g., Figure 10 As shown), trapezoidal (as shown) Figure 9 (as shown) and spherical (as shown) Figure 11 The shape (as shown) is preferably trapezoidal, and the inclined surface of the trapezoid facilitates the ejection of the limiting ball 6 from the limiting groove 24. Furthermore, when the cross-section of the limiting groove 24 is rectangular, the geometric center of the limiting ball 6 must be located outside the plunger cavity 4 to prevent the limiting ball 6 from being simultaneously stuck in both the rectangular limiting groove 24 and the sliding groove 23. Further, regardless of the shape of the cross-section of the limiting groove 24, as long as the geometric center of the limiting ball 6 is located outside the plunger cavity 4, it can be prevented that the limiting ball 6 is simultaneously stuck in both the rectangular limiting groove 24 and the sliding groove 23. In addition, the limiting groove 24 is annular, and multiple sliding grooves 23 and limiting balls 6 can be provided, with each sliding groove 23 corresponding to a specific limiting ball 6, arranged in a circular array around the axis of the actuator 3.

[0033] In one embodiment, a spring cavity 25 is provided on the conductive outer shell 1, and a positioning flange 26 is provided between the actuation cavity 22 and the spring cavity 25. A third through hole 27 is provided on the positioning flange 26, which connects the spring cavity 25 and the actuation cavity 22. The plunger 5 passes through the plunger cavity 4, the third through hole 27 and the spring cavity 25, and an annular cavity 28 is formed between the plunger 5 and the spring cavity 25. A compression spring 29 is provided in the annular cavity 28. A limiting plate 30 is formed on one end of the plunger 5 near the electrical contact point 8. One end of the compression spring 29 abuts against the end face of the limiting plate 30 away from the electrical contact point 8, and the other end of the compression spring 29 abuts against the end face of the positioning flange 26 away from the actuator 3. The end face of the limiting plate 30 near the electrical contact point 8 is in contact with or separate from the electrical contact point 8.

[0034] like Figure 3 and Figure 4As shown, a spring cavity 25 is provided on the conductive outer shell 1, and a positioning flange 26 is provided between the execution cavity 22 and the spring cavity 25. The positioning flange 26 protrudes in the axial direction and a third through hole 27 is provided on the positioning flange 26. The third through hole 27 connects the spring cavity 25 and the execution cavity 22 so that the plunger 5 can pass through the plunger cavity 4, the third through hole 27 and the spring cavity 25. An annular cavity is formed between the plunger 5 and the spring cavity 25. A spring, a compression spring 29, is installed inside the annular cavity and has a pre-compression setting. The compression spring 29 is located between the conductive housing 1 and the plunger 5. Specifically, a limiting plate 30 is formed on the end of the plunger 5 near the electrical contact point 8. One end of the compression spring 29 abuts against the end face of the limiting plate 30 away from the electrical contact point 8, and the other end of the compression spring 29 abuts against the end face of the positioning flange 26 away from the actuator 3. Because the compression spring 29 has a pre-compression setting, it abuts against the plunger 5 and the conductive housing 1, causing the plunger 5 to tend to move towards the electrical contact point 8 relative to the conductive housing 1. The end face of the limiting plate 30 near the electrical contact point 8 is in contact with or separate from the electrical contact point 8.Specifically, when the driver pulls the pull ring handle 11 in an emergency, overcoming the friction between the pull ring handle 11 and the first sealing ring 9 and the second sealing ring 12, the pull ring handle 11 moves away from the actuator 3. The pull ring handle 11 has not yet contacted the first flange 19 of the built-in pull rod 15, therefore the pull ring handle 11 slides without travel. When the pull ring handle 11 is completely disengaged from the conductive housing 1 and contacts the first flange 19 of the built-in pull rod 15, the pull ring handle 11 drives the first flange 19 to move, and the first flange 19 drives the second... As flange 20 moves, the second flange 20 drives actuator 3 to move away from electrical contact point 8. Since actuator 3 and plunger 5 are engaged by limiting ball 6, actuator 3 drives plunger 5 to move synchronously away from electrical contact point 8 via limiting ball 6. Because a compression spring 29 is provided between plunger 5 and conductive housing 1, the compression spring 29 applies a tendency for plunger 5 to move relative to actuator 3 towards electrical contact point 8. Simultaneously, the limiting groove 24 of plunger 5 abuts against limiting ball 6, and limiting ball 6 tends to move away from limiting groove 24 in sliding groove 23. However, the limiting ball 6 is limited within the actuator cavity 22. When the limiting ball 6 moves from the actuator cavity 22 area to the handle area, it can move away from the limiting groove 24 within the sliding groove 23 under the compression of the upper limiting groove 24 of the plunger 5. At this time, the limiting ball 6 moves into the handle cavity 10. When the limiting ball 6 disengages from the limiting groove 24, it no longer engages the actuator 3 with the plunger 5. The actuator 3 separates from the plunger 5, and the plunger 5 moves towards the electrical contact point 8 under the elastic force of the compression spring 29, causing the limiting plate 30 on the plunger 5 to engage with the upper limiting groove 24. When the electrical contact point 8 is in contact, the positive terminal of the power supply 2 is connected to the conductive housing 1, and the negative terminal of the power supply 2 is connected to the electrical contact point 8. The conductive housing 1 is connected to the plunger 5, and the plunger 5 is in contact with the electrical contact point 8. Furthermore, the conductive housing 1, the plunger 5, the electrical contact point 8, and the compression spring 29 are all conductive components. Therefore, when the limiting plate 30 on the plunger 5 contacts the electrical contact point 8, the positive and negative terminals of the power supply 2 are short-circuited through the conductive housing 1, the plunger 5, the compression spring 29, and the electrical contact point 8, triggering a short-circuit signal. This trigger signal detonates the explosive device. When the limiting plate 30 on the plunger 5 contacts the electrical contact point 8, the compression spring 29 still has a pre-compression and is in a compressed state. This compression spring 29 provides a stable contact force between the limiting plate 30 and the electrical contact point 8, improving the reliability of the explosive activation device.

[0035] In one embodiment, the insulating base 7 is provided with a plurality of electrical contact points 8, which are redundant with each other.

[0036] Multiple electrical contact points 8 are provided on the insulating base 7. Therefore, the multiple electrical contact points 8 are redundant contact points. When one of the electrical contact points fails, electrical connection can still be achieved through the redundant contact points to improve the reliability of the explosion activation device.

[0037] Example 2 An emergency ejection seat is provided, comprising the aforementioned explosive activation device. An explosive device is connected to the explosive activation device, which includes a conductive housing 1 and a power source 2. An actuator 3 is slidably connected within the conductive housing 1. A plunger cavity 4 is provided within the actuator 3, and a plunger 5 is slidably connected within the plunger cavity 4. A limiting ball 6 is slidably connected to the actuator 3. The actuator 3 and the plunger 5 are engaged or disengaged via the limiting ball 6. An insulating base 7 is provided on the conductive housing 1, and an electrical contact point 8 is provided on the insulating base 7. One end of the plunger 5 near the electrical contact point 8 is in contact with or disengaged from the electrical contact point 8. The conductive housing 1, actuator 3, limiting ball 6, and plunger 5 are all conductive components. The positive terminal of the power source 2 is connected to the conductive housing 1, and the negative terminal of the power source 2 is connected to the electrical contact point 8.

[0038] The explosion activation device of this application has an actuator 3 connected to a plunger 5, and the actuator 3 and the plunger 5 are switched between a locked state and a separated state via a limiting ball 6. When the actuator 3 and the plunger 5 are locked, the end of the plunger 5 near the electrical contact point 8 is separated from the electrical contact point 8, the positive and negative terminals of the power supply 2 are disconnected, and the explosion activation device is in an inactive state and will not trigger an explosion signal. When the actuator 3 and the plunger 5 are separated, the end of the plunger 5 near the electrical contact point 8 is in contact with the electrical contact point 8. When the positive and negative terminals of power supply 2 are short-circuited, the explosion activation device is activated and will trigger an explosion signal, thereby triggering the explosion device and then using the explosion device to eject the emergency ejection seat. Therefore, this application only needs to pull the actuator 3 to change the connection state between the actuator 3 and the plunger 5 to achieve the activation function. It no longer uses the complex crank-connecting rod structure of the prior art as the activation device, which simplifies the structure of the explosion activation device and also simplifies the additional structure of the emergency ejection seat, thereby improving the flexibility of the emergency ejection seat. Furthermore, the branch connecting power supply 2 to conductive casing 1 forms a positive branch, and the branch connecting power supply 2 to electrical contact point 8 forms a negative branch. A power sequencer can be connected to either the positive or negative branch. The power sequencer can start the power supply sequentially from the front-end device to the back-end device, and shut down various electrical devices sequentially from the back-end to the front-end when the power supply is turned off. This effectively unifies the management and control of various electrical devices, avoids human error, reduces the impact of electrical devices on the power grid during switching, and avoids the impact of induced current on the devices, ensuring the stability of the entire power system.

[0039] Example 3 An aircraft is provided, comprising the aforementioned emergency ejection seat, the emergency ejection seat comprising the aforementioned explosion activation device, the explosion activation device being connected to an explosive device, the explosion activation device comprising a conductive housing 1 and a power source 2, an actuator 3 being slidably connected within the conductive housing 1, a plunger cavity 4 being disposed within the actuator 3, a plunger 5 being slidably connected within the plunger cavity 4, a limiting ball 6 being slidably connected to the actuator 3, the actuator 3 and the plunger 5 being engaged or disengaged by the limiting ball 6, an insulating base 7 being disposed on the conductive housing 1, an electrical contact point 8 being disposed on the insulating base 7, one end of the plunger 5 near the electrical contact point 8 being in contact with or disengaged from the electrical contact point 8, the conductive housing 1, the actuator 3, the limiting ball 6 and the plunger 5 being all conductive components, the positive terminal of the power source 2 being connected to the conductive housing 1, and the negative terminal of the power source 2 being connected to the electrical contact point 8.

[0040] The explosion activation device of this application has an actuator 3 connected to a plunger 5, and the actuator 3 and the plunger 5 are switched between a locked state and a separated state via a limiting ball 6. When the actuator 3 and the plunger 5 are in the locked state, the end of the plunger 5 near the electrical contact point 8 is separated from the electrical contact point 8, the positive and negative terminals of the power supply 2 are disconnected, and the explosion activation device is in an inactive state and will not trigger an explosion signal; when the actuator 3 and the plunger 5 are in the separated state, the end of the plunger 5 near the electrical contact point 8 is locked from the electrical contact point 8. When the positive and negative terminals of power supply 2 are short-circuited, the explosion activation device is activated and will trigger an explosion signal, thereby triggering the explosion device and then using the explosion device to eject the emergency ejection seat. Therefore, this application only needs to pull the actuator 3 to change the connection state between the actuator 3 and the plunger 5 to achieve the activation function. It no longer uses the complex crank-connecting rod structure of the prior art as the activation device, which simplifies the structure of the explosion activation device, thus simplifying the additional structure of the emergency ejection seat and further simplifying the structure of the aircraft.

[0041] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An explosion activation device, characterized in that: Includes a conductive housing (1) and a power supply (2). An actuator (3) is slidably connected inside the conductive housing (1). A plunger cavity (4) is provided inside the actuator (3). A plunger (5) is slidably connected inside the plunger cavity (4). A limiting ball (6) is slidably connected to the actuator (3). The actuator (3) and the plunger (5) are engaged or disengaged by the limiting ball (6). An insulating base (7) is provided on the conductive housing (1). An electrical contact point (8) is provided on the insulating base (7). The plunger ( 5) The end of the device near the electrical contact point (8) is in contact with or separated from the electrical contact point (8). The conductive housing (1), actuator (3), limit ball (6) and plunger (5) are all conductive components. The positive terminal of the power supply (2) is connected to the conductive housing (1), and the negative terminal of the power supply (2) is connected to the electrical contact point (8). The device also includes a first sealing ring (9) and an internal pull rod (15). A handle cavity (10) is provided inside the conductive housing (1), and a pull ring handle (11) is slidably connected inside the handle cavity (10). The pull ring handle (11) is provided with a sliding cavity (16) of a preset length and a first through hole (17). The sliding cavity (16) is connected to the first through hole (17). The actuator (3) is provided with a second through hole (18), which is connected to the plunger cavity (4). The built-in pull rod (15) passes through the sliding cavity (16), the first through hole (17), the second through hole (18), and the plunger cavity (4). One end of the built-in pull rod (15) is provided with a first flange (19). The other end of the pull rod (15) is provided with a second flange (20). The first flange (19) is provided in the sliding cavity (16). The diameter of the first flange (19) is larger than the diameter of the first through hole (17). The second flange (20) is provided in the plunger cavity (4). The diameter of the second flange (20) is larger than the diameter of the second through hole (18). When the pull ring handle (11) is pulled, the pull ring handle (11) first goes through a period of idle travel until the pull ring handle (11) contacts the built-in pull rod (15) and drives the actuator (3) to move upward.An execution cavity (22) is provided inside the conductive housing (1). A spring cavity (25) is provided on the conductive housing (1). A positioning flange (26) is provided between the execution cavity (22) and the spring cavity (25). A third through hole (27) is provided on the positioning flange (26). The third through hole (27) connects the spring cavity (25) and the execution cavity (22). The plunger (5) passes through the plunger cavity (4), the third through hole (27) and the spring cavity (25). An annular cavity (28) is formed between the plunger (5) and the spring cavity (25). A compression spring (29) is provided in the annular cavity (28). A spring is provided on the plunger (5) near the electrical contact point (8). A limiting plate (30) is formed at the end. One end of the compression spring (29) abuts against the end face of the limiting plate (30) away from the electrical contact point (8), and the other end of the compression spring (29) abuts against the end face of the positioning flange (26) away from the actuator (3). The end face of the limiting plate (30) near the electrical contact point (8) is in contact with or separate from the electrical contact point (8). When the actuator (3) and the plunger (5) are in a locked state, the end of the plunger (5) near the electrical contact point (8) is separated from the electrical contact point (8). When the actuator (3) and the plunger (5) are in a separated state, the end of the plunger (5) near the electrical contact point (8) is in contact with the electrical contact point (8).

2. The explosion activation device according to claim 1, characterized in that: The pull ring handle (11) is press-fitted to the inner wall of the handle cavity (10) through the first sealing ring (9), and the pull ring handle (11) is connected to the actuator (3).

3. The explosion activation device according to claim 2, characterized in that: It also includes a second sealing ring (12), a mounting cavity (13) is provided on the pull ring handle (11), and a connecting end (14) is provided on the actuator (3). The connecting end (14) and the mounting cavity (13) are interference-fitted through the second sealing ring (12).

4. The explosion activation device according to claim 2, characterized in that: It also includes a third sealing ring (21), the execution cavity (22) is connected to the handle cavity (10), the actuator (3) is slidably connected in the execution cavity (22), and the actuator (3) is interference-fitted to the inner wall of the execution cavity (22) through the third sealing ring (21).

5. The explosion activation device according to claim 4, characterized in that: The actuator (3) is provided with a sliding groove (23), and the limiting ball (6) is slidably connected in the sliding groove (23). The plunger (5) is provided with a limiting groove (24) at one end near the actuator (3). The limiting ball (6) is simultaneously engaged in the sliding groove (23) and the limiting groove (24). The sliding direction of the limiting ball (6) in the sliding groove (23) is towards or away from the limiting groove (24). The point on the limiting ball (6) closest to the axis of the actuator (3) is the target point. The minimum distance between the target point and the inner wall of the plunger cavity (4) is the first distance. The radial distance between the inner wall of the execution cavity (22) and the inner wall of the handle cavity (10) is the second distance. The second distance is greater than the first distance. The inner diameter of the handle cavity (10) is greater than the inner diameter of the execution cavity (22).

6. The explosion activation device according to claim 1, characterized in that: Multiple electrical contact points (8) are provided on the insulating base (7), and the multiple electrical contact points (8) are redundant contact points.

7. An emergency ejection seat, characterized in that: It includes the explosion activation device as described in any one of claims 1 to 6, wherein an explosion device is connected to the explosion activation device.

8. An aircraft, characterized in that: Includes the emergency ejection seat as described in claim 7.

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