Solid oxygen generator mechanical firing device and assembly process

Abstract

The application discloses a solid oxygen generator mechanical firing device and an assembling process, which comprises a firing barrel, an energy storage spring, a firing pin seat and a firing base. The firing barrel comprises a first embedding groove at the upper end and a second embedding groove at the lower end, and a diameter-narrowing channel is arranged between the first embedding groove and the second embedding groove. The firing pin seat comprises a firing pin at the bottom end and a column connected with the firing pin. The energy storage spring is compressed between the column and the second embedding groove. A locking assembly is arranged between the column and the first embedding groove. The locking assembly comprises a horizontal through groove arranged at the upper end of the column, and steel balls are symmetrically arranged in the horizontal through groove. A rotating activation assembly is arranged in the column to make the steel balls completely extend into the horizontal through groove. Through the design of the rotating two-state locking mechanism, i.e. a torsion bar + a first abutting surface and a second abutting surface + a steel ball and a diameter-narrowing channel, controllable conversion of three stages of energy storage, safety and firing is realized, and the safety is better. Meanwhile, the whole device has a simple structure and is convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of oxygen production technology. Background Technology

[0002] A solid chemical oxygen generator is the core component of a solid chemical oxygen source, typically composed of an oxygen-enriching compound such as sodium chlorate or sodium perchlorate, mixed with a small amount of metal fuel powder, and necessary binders and catalysts, and then pressed together. Its core principle lies in the efficient release of oxygen through a controlled chemical reaction. When correctly activated, a strong exothermic decomposition reaction occurs inside the propellant column. The oxygen-enriching compound decomposes at high temperatures, releasing gaseous oxygen, while the combustion of the metal fuel provides the high temperature required to sustain the reaction, forming a self-sustaining oxygen release process. This design makes it compact, stable in storage, and capable of continuously supplying large amounts of oxygen without external power after startup. It is particularly suitable for respiratory support in confined or emergency environments, such as aviation emergency systems, submarines, or mining self-rescue devices.

[0003] To reliably initiate the oxygen-emission reaction within the propellant grain, a specialized propellant firing device is required. The core function of this device is to provide initial high-intensity ignition energy, instantly igniting the sensitive igniter on the surface of the propellant grain or embedded within it. Common firing methods include mechanical impact and electric ignition. Mechanical impact typically involves a spring-driven firing pin that violently strikes an igniter containing a sensitive pyrotechnic component upon activation; electric ignition utilizes the instantaneous high temperature generated by current passing through a high-resistance bridge wire to ignite the igniter surrounding the wire. Regardless of the method, the goal is to generate a brief but intense localized high-temperature flame or impact sufficient to overcome the energy threshold for propellant initiation, reliably igniting the initial stage of the propellant grain and ensuring the successful initiation and rapid propagation of the oxygen-emission reaction throughout the entire propellant grain cross-section.

[0004] The propellant and the firing device together constitute a complete disposable chemical oxygen generation system. As the system's switch, the firing device must be designed to be highly reliable and safe, typically employing multiple safety mechanisms to prevent accidental triggering and ensuring foolproof operation when needed. Once successfully ignited, the flame rapidly acts on the initial combustion surface of the solid chemical oxygen generator, triggering its pre-set exothermic decomposition reaction chain. However, existing firing devices, for safety reasons, often feature complex covers or locking mechanisms, requiring a cumbersome unlocking process before use. After unlocking, the entire device is in a highly sensitive, ready-to-fire state, and improper operation can easily lead to firing failure or accidental firing. For example, after a press-type unlock, accidental drops or impacts can cause accidental firing. This entire process can easily cause high operator stress, increasing the difficulty of operation. Furthermore, complex covers or locking mechanisms often require more complex and lengthy production and assembly processes, which is not conducive to large-scale mass production. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention aims to provide a mechanical firing device for a solid oxygen generator.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] A mechanical firing device for a solid oxygen generator includes a firing cap, a storage spring, a firing pin holder, and a firing base. The firing cap includes a first groove at an upper end and a second groove at a lower end, with a narrowing channel between the first and second grooves. The firing pin holder includes a firing pin at the bottom end and a column connected to the firing pin. The storage spring is sleeved on the outer periphery of the column and abuts against the top wall of the second groove at its upper end. The column extends upward from the second groove through the channel into the first groove, and the storage spring is compressed between the column and the second groove. A locking component is provided between the column and the first groove. The locking component includes a horizontal through groove at the upper end of the column, with steel balls symmetrically arranged in the horizontal through groove. The steel balls are partially embedded in the first groove. A rotation activation component is provided in the column to make the steel balls fully extend into the horizontal through groove.

[0008] In the above scheme, the firing pin holder's column passes through the second groove at the lower end of the firing cap and the middle variable-diameter channel, extending into the upper first groove. The energy storage spring is sleeved on the outer periphery of the column and is compressed by the top wall of the second groove and the column base to complete energy storage. The locking component achieves safety by engaging the steel ball in the horizontal through groove with the first groove. When the steel ball is constrained by the rotation activation component, it is completely retracted into the through groove, and the column can freely pass through the channel. When the steel ball is activated and partially protrudes, its diameter is larger than the channel, thus locking the column and the firing pin in the first groove. Through the mechanical interlock between the variable-diameter channel and the steel ball, combined with the pre-compression of the energy storage spring, a stable ready-to-fire state is formed. After the steel ball retracts, the column can freely pass through the channel, and the spring releases to push the firing pin down at high speed to complete the firing. The introduction of the rotation activation component allows locking / unlocking to be completed by rotation, improving safety and controllability. Locking by rotation is more stable, eliminating concerns about accidental firing due to impact, thus improving safety. At the same time, the entire device has a simple structure and is easy to operate.

[0009] Furthermore, the rotation activation component includes a torsion bar rotatably connected to the center of the column. The torsion bar passes through the middle of the horizontal through slot and abuts against the steel balls on both sides at both ends. A set of first abutting surfaces and a set of second abutting surfaces are symmetrically provided on the torsion bar at the steel balls. The first abutting surfaces and the second abutting surfaces are arranged perpendicularly. The distance between the two first abutting surfaces is less than the distance between the two second abutting surfaces. The distance between the steel balls on both sides plus the distance between the two second abutting surfaces is greater than the diameter of the channel, and the distance between the steel balls on both sides plus the distance between the two first abutting surfaces is not greater than the diameter of the channel.

[0010] The above scheme allows the device to be decomposed into a locked state and an unlocked state. In the locked state, when the steel ball is partially embedded in the first groove, the column is locked because its diameter is larger than the channel. In the unlocked state, the torsion bar rotates 90° to the first contact surface (with a small gap), and the steel ball retracts until the total width is less than or equal to the channel diameter, allowing the column to move down and complete the firing of the device. The entire switching process is achieved by rotating the torsion bar. The vertically set contact surface ensures that the state transition is completed with a 90° rotation, avoiding accidental unlocking. At the same time, the distance between the steel balls on both sides and the two first contact surfaces is not greater than the channel diameter, ensuring that the column can pass through the channel when the steel ball retracts into the horizontal channel.

[0011] Furthermore, the upper part of the torsion bar is provided with an arc-shaped torsion ring, and the torsion ring is on the same horizontal plane as the first contact surface.

[0012] The above scheme sets up a torsion ring and places it on the same horizontal plane as the first contact surface to ensure that the rotation angle is controllable and the direction of rotation is marked to avoid accidental contact. At the same time, the operator drives the torsion bar to rotate synchronously by rotating the arc-shaped torsion ring. The ring design provides a fulcrum for applying force and facilitates manual operation.

[0013] Furthermore, both the first contact surface and the second contact surface are provided with recesses adapted to the steel ball.

[0014] With the above method, the steel ball is embedded in the recess of the contact surface, which reduces the relative sliding of the contact surface and improves the stability of the device.

[0015] Furthermore, the column has a base extending outward at the firing pin, the base slidingly abutting against the second groove, and the upper end face of the base being connected to the bottom end of the energy storage spring.

[0016] With the above scheme, the chassis slides into the second groove, and the bottom end of the energy storage spring is fixed to the upper surface of the chassis, avoiding energy loss due to spring tilting. At the same time, the chassis efficiently transfers the kinetic energy released by the spring to the firing pin.

[0017] Furthermore, both the outer periphery of the firing cap and the inner peripheral wall of the firing base are provided with threads, and the outer periphery of the firing cap and the inner peripheral wall of the firing base are screwed together by the threads.

[0018] With the above scheme, the firing cap is screwed into the inner thread of the base to form a closed firing chamber, which facilitates quick assembly and disassembly. At the same time, the firing base corresponds to the firing pin, which facilitates the firing pin to strike the pyrotechnic device on the base vertically.

[0019] The second objective of this application is to provide an assembly process for a mechanical firing device in a solid oxygen generator, applicable to the aforementioned mechanical firing device, comprising the following steps: Step S1: Collect parts and perform quality sampling inspection on each part; Step S2: Pre-install the firing pin seat, load steel balls along the horizontal through groove, and fit an energy storage spring around the outer periphery of the cylinder; Step S3: Press the firing cap and firing pin seat together; Step S4: Rotate the torsion bar to lock the device; Step S5: Sample assembly of the firing cap and firing base to verify the firing effect.

[0020] Through the above scheme, in step S2, the pre-assembly stage inserts the steel ball, energy storage spring, and torsion bar into the firing pin holder; in step S3, during the pressing stage, the tooling pushes the firing cap down, and the cylinder carrying the compression spring passes through the channel into the first slot. At this time, the torsion bar pushes the steel ball away, causing it to temporarily rest on the first contact surface, and the steel ball is in a retracted state within the horizontal slot; in step S4, during the locking stage, the torsion bar is rotated 90°, and the second contact surface pushes the steel ball away, causing it to protrude and lock into the first slot, while the spring remains compressed and energy stored. During firing, the torsion bar is rotated again to reset the first contact surface, the steel ball loses its support and retracts, the spring releases and pushes the firing pin holder downward at high speed, and the firing pin strikes the base to complete the firing. The entire assembly process is highly compatible with the mechanical logic of the device, and the tooling and rotation operation ensure the precise positioning of the locking mechanism; sampling verification directly simulates actual firing, ensuring consistency in mass production. The entire assembly process is simple, with fewer steps, facilitating automated mass production, greatly reducing production steps, and increasing production capacity.

[0021] Furthermore, in step S2: the torsion bar is inserted into the cavity of the upper cylinder of the impact needle seat, and at the same time, the steel ball is pushed into the horizontal through groove, and the energy storage spring is fitted into the cylinder, with the lower end of the energy storage spring abutting against the chassis.

[0022] Further, in step S3, the pressing of the firing cap and firing pin seat includes the following process: the torsion bar, along with the firing cap, is embedded and fixed in the fixture; the firing pin seat is positioned directly below the firing cap and fixed by the fixture; the reciprocating mechanism drives the fixture and pushes the firing cap downwards; the energy storage spring at the upper end of the column enters the second groove and continues to compress; at this time, the firing pin seat extends from the second groove; the torsion bar is embedded in the column, and simultaneously, the upper end of the column passes through the channel and enters the first groove; the torsion bar then passes through the horizontal through slot and pushes apart the two steel balls; the torsion bar... The upper steel ball abuts against the first contact surface, and the energy storage spring is compressed to the corresponding stroke. In step S4, the torsion bar is twisted 90° to cause the second contact surface to abut against the steel ball, causing the two steel balls to move in opposite directions along the horizontal through groove and eventually partially extend into the horizontal through groove to abut against the first recess. At this time, the fixing fixtures of the firing pin seat and the firing cap are released. Since the second contact surface and the steel ball remain stable, the steel ball is engaged with the first recess, and the upper end of the column together with the steel ball is fixed in the first recess, realizing device locking and energy storage.

[0023] Furthermore, in step S5, the firing cap and firing base are fixed by screwing together. After completion, the torsion bar is twisted 90°. At this time, the second contact surface rotates to the first contact surface, and the first contact surface contacts the steel ball. The steel ball enters the horizontal through groove under the extrusion pressure of the first groove. The energy storage spring extends and releases the stored energy. The upper end of the column, together with the horizontal through groove, quickly moves downward along the channel. The firing pin seat, together with the bottom firing pin, quickly moves downward to the firing base, completing the firing of the device.

[0024] The beneficial effects of this invention are as follows: 1. This invention has a simple structure. The firing pin holder's column passes through the second groove at the lower end of the firing cap and the middle variable-diameter channel, extending into the upper first groove. The energy storage spring is sleeved on the outer periphery of the column and is compressed by the top wall of the second groove and the column base to complete energy storage. The locking component achieves safety by engaging the steel ball in the horizontal through groove with the first groove. When the steel ball is constrained by the rotation activation component, it is completely retracted into the through groove, and the column can freely pass through the channel. When the steel ball is activated and partially protrudes, its diameter is larger than the channel, thus locking the column and the firing pin in the first groove. Through the mechanical interlock between the variable-diameter channel and the steel ball, combined with the pre-compression of the energy storage spring, a stable ready-to-fire state is formed. After the steel ball retracts, the column can freely pass through the channel, and the spring releases to push the firing pin down at high speed to complete firing. The introduction of the rotation activation component allows locking / unlocking to be completed by rotation, improving safety and controllability. Locking by rotation is more stable, eliminating concerns about accidental firing due to impact, and improving safety. At the same time, the entire device has a simple structure and is easy to operate. 2. The entire assembly process is highly compatible with the mechanical logic of the device. Tooling and rotation operations ensure the precise positioning of the locking mechanism. Sampling verification directly simulates actual firing, ensuring consistency in mass production. The entire assembly process is simple with fewer steps, facilitating automated mass production, greatly reducing production steps, and increasing capacity. 3. This mechanical firing device achieves controllable switching between three stages—energy storage, safety, and firing—through an innovative rotary dual-state locking mechanism, namely a torsion bar + first and second contact surfaces + steel ball and variable diameter channel design. When the steel ball is locked, its diameter is larger than the channel, effectively preventing accidental release due to vibration. Switching between safety and firing states only requires a 90° rotation of the torsion bar, making operation simple. The assembly process is deeply integrated with the device's working mechanism, and mass production stability is ensured through tooling pressing and rotary locking. Attached Figure Description

[0025] Figure 1 This is a cross-sectional structural schematic diagram of the present invention, in which the energy storage spring is compressed and the device is in a ready-to-fire state; Figure 2 This is a cross-sectional structural schematic diagram of the present invention, in which the energy storage spring is in an extended state and the device is in a firing state; Figure 3This is an assembly diagram of this application, in which the energy storage spring is in an extended state and the device is in a state of being assembled and pressed. Figure 4 This is an assembly diagram of this application, in which the energy storage spring is compressed and the torsion bar is in a state of waiting to rotate.

[0026] Reference numerals: 11. Firing cap; 12. Energy storage spring; 13. Firing pin seat; 14. Firing base; 15. First groove; 16. Second groove; 17. Channel; 18. Firing pin; 19. Column; 20. Horizontal through groove; 21. Steel ball; 22. Torsion bar; 23. First contact surface; 24. Second contact surface; 25. Torsion ring; 26. Chassis. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] Example 1 like Figures 1 to 2 As shown, this embodiment provides a firing device with reliable vibration-resistant locking, purely mechanical triggering, and highly adaptable assembly process, ensuring rapid activation of the propellant charge in emergency situations. Specifically, it discloses a mechanical firing device for a solid oxygen generator, including a firing cap 11, an energy storage spring 12, a firing pin seat 13, and a firing base 14.

[0030] The firing cap 11 is integrally formed, with a first groove 15 at the upper end and a second groove 16 at the lower end, connected by a channel 17 in the middle. The channel 17 is smaller than the diameter of the second groove 16 and the first groove 15. The firing pin seat 13 includes a firing pin 18 at the bottom end and a column 19 welded to the firing pin 18. The energy storage spring 12 is made of stainless steel. It is located on the outer periphery of the column 19 and abuts against the top wall of the second groove 16 at its upper end. The column 19 extends upward from the second groove 16 through the channel 17 and into the first groove 15. The energy storage spring 12 is compressed between the column 19 and the second groove 16. The column 19 is provided with a base 26 extending outward at the firing pin 18. The base 26 slides against the second groove 16. The upper end of the base 26 is connected to the bottom end of the energy storage spring 12. A locking component is provided between the column 19 and the first groove 15. The locking component includes a horizontal through groove 20 at the upper end of the column 19. Steel balls 21 are symmetrically arranged in the horizontal through groove 20. The steel balls 21 are partially embedded in the first groove 15. A rotation activation component is provided in the column 19 to make the steel balls 21 fully extend into the horizontal through groove 20.

[0031] Therefore, the column 19 of the firing pin holder 13 passes through the second groove 16 at the lower end of the firing cap 11 and the middle variable diameter channel 17, and extends into the first groove 15 at the upper end. The energy storage spring 12 is sleeved on the outer periphery of the column 19 and is compressed by the top wall of the second groove 16 and the base 26 of the column 19 to complete energy storage. The locking component achieves safety by engaging the steel ball 21 in the horizontal through groove 20 with the first groove 15. When the steel ball 21 is constrained by the rotation activation component, it is completely retracted into the through groove, and the column 19 can freely pass through the channel 17. When the steel ball 21 is activated and partially protrudes, its diameter is larger than the channel 17, thereby locking the column 19 and the firing pin 18 in the first groove 15. Through the mechanical interlock between the variable diameter channel 17 and the steel ball 21, combined with the pre-compression of the energy storage spring 12, a stable ready-to-fire state is formed. After the steel ball 21 retracts, the column 19 can freely pass through the channel 17. The spring release pushes the firing pin to strike at high speed to complete the firing. The chassis 26 and the second groove 16 slide together. The bottom end of the energy storage spring 12 is fixed to the upper surface of the chassis 26 to avoid energy loss due to spring deflection. At the same time, the chassis 26 efficiently transfers the kinetic energy released by the spring to the firing pin. The introduction of the rotation activation component allows locking / unlocking to be completed by rotation operation, which improves safety and controllability. Locking is completed by rotation, and the locking is more stable. There is no need to worry about accidental firing due to impact, which is safer. At the same time, the entire device has a simple structure and is easy to operate.

[0032] Reference Figure 1 and Figure 2 and Figure 3 and Figure 4The rotation activation component includes a torsion bar 22 rotatably connected to the center of the column 19. The torsion bar 22 passes through the middle of the horizontal through groove 20 and abuts against the steel balls 21 on both sides at both ends. A set of first abutment surfaces 23 and a set of second abutment surfaces 24 are symmetrically arranged on the torsion bar 22 at the steel balls 21. The distance between the two first abutment surfaces 23 is less than the distance between the two second abutment surfaces 24, and the distance between the steel balls 21 on both sides plus the distance between the two second abutment surfaces 24 is greater than the diameter of the channel 17, and the distance between the steel balls 21 on both sides plus the distance between the two first abutment surfaces 23 is not greater than the diameter of the channel 17. That is, two steel balls 21 are symmetrically placed in the horizontal through groove 20, and the torsion bar 22 is built into the cavity of the column 19. An arc-shaped torsion ring 25 is welded to the upper part of the bar, and the bar body is machined with two sets of vertical abutment surfaces: including the first abutment surface 23 (including the recess) and the second abutment surface 24 (including the same specification recess). Both the outer periphery of the firing cap 11 and the inner periphery of the firing base 14 are provided with threads. The outer periphery of the firing cap 11 and the inner periphery of the firing base 14 are screwed together by the threads. The firing cap is screwed into the threads of the inner wall of the base to form a closed firing chamber, which is convenient for quick disassembly and assembly. At the same time, the firing base 14 corresponds to the firing pin 18, which is convenient for the firing pin 18 to strike the pyrotechnic device on the base vertically.

[0033] Assembly relationship: The column 19 passes through the firing cap from bottom to top, the base 26 slides against the inner wall of the second groove 16, the upper end of the energy storage spring 12 abuts against the top wall of the second groove 16, and the lower end is fixed to the base 26. The torsion bar 22 vertically penetrates the horizontal through groove 20, and the steel ball 21 is embedded in the recess of the second abutment surface 24; The firing cap is screwed into the base via threads, forming a closed firing chamber.

[0034] Reference Figures 1 to 4 The second objective of this application is to provide an assembly process for a mechanical firing device in a solid oxygen generator, applicable to the aforementioned mechanical firing device, comprising the following steps: Step S1: Collect parts and classify and conduct quality spot checks on each part, including checking the hardness of steel ball 21 (HRC 58-62) and the compression force of energy storage spring 12. Step S2: Pre-install the firing pin seat 13, load the steel ball 21 along the horizontal through groove 20, and fit the energy storage spring 12 on the outer periphery of the column 19. Specifically, the torsion bar 22 is inserted into the cavity of the column 19 on the firing pin seat 13, and the steel ball 21 is pushed into the horizontal through groove 20 at the same time. The energy storage spring 12 is fitted into the column 19, and the lower end of the energy storage spring 12 abuts against the chassis 26. Step S3: Pressing the firing cap 11 and firing pin seat 13, specifically including the pre-assembly stage where steel balls 21, energy storage spring 12 and torsion bar 22 are installed into the firing pin seat 13; In the pressing stage of step S3, the torsion bar 22, together with the firing cap 11, is embedded into the fixture for fixation. The firing pin seat 13 is set directly below the firing cap 11 and fixed by the fixture. The reciprocating mechanism drives the fixture and pushes the firing cap 11 down. The energy storage spring 12 at the upper end of the column 19 enters the second groove 16 and continues to compress. At this time, the firing pin seat 13 extends from the second groove 16. The torsion bar 22 is embedded into the column 19. At the same time, the upper end of the column 19 passes through the channel 17 and enters the first groove 15. The torsion bar 22 passes through the horizontal through groove 20 and squeezes out the two steel balls 21. The steel balls 21 on the torsion bar 22 abut against the first contact surface 23. The energy storage spring 12 is compressed to the corresponding stroke. Step S4: Rotate the torsion bar 22 to lock the device. Specifically, rotate the torsion bar 22 by 90° to cause the second contact surface 24 to contact the steel ball 21. This causes the two steel balls 21 to move in opposite directions along the horizontal through groove 20 and eventually partially extend into the horizontal through groove 20 to contact the first recess 15. At this time, release the fixing fixtures of the firing pin seat 13 and the firing cap 11. Since the second contact surface 24 and the steel ball 21 remain stable, the steel ball 21 is engaged with the first recess 15. The upper end of the column 19, together with the steel ball 21, is fixed in the first recess 15, thus realizing device locking and energy storage. Step S5: Sample assembly of firing cap 11 and firing base 14 to verify firing effect. Specifically, the firing cap 11 and firing base 14 are fixed by screwing together. After completion, the torsion bar 22 is twisted 90°. At this time, the second abutment surface 24 rotates to the first abutment surface 23. The first abutment surface 23 abuts against the steel ball 21. The steel ball 21 is squeezed by the first groove 15 and enters the horizontal through groove 20. The energy storage spring 12 extends and releases the stored energy. The upper end of the column 19, together with the horizontal through groove 20, quickly moves downward along the channel 17. The firing pin seat 13, together with the bottom firing pin 18, quickly moves downward to the firing base 14, completing the firing of the device.

[0035] Scenario 1: Security Lockout Vibration test (amplitude 2mm@200Hz): The steel ball 21 is constrained by the second contact surface 24, and the convex part forms a mechanical interlock with the first groove 15, with no displacement release.

[0036] Scenario 2: Firing Process After rotating the torsion bar 2290°: the spring releases within 3ms, the firing pin strikes the pyrotechnic device at a speed of 8m / s, and the ignition delay is ≤10ms.

[0037]

[0038] Implementation Principle: This application discloses a mechanical firing device and assembly process for a solid oxygen generator. The column 19 of the firing pin seat 13 passes through the second groove 16 at the lower end of the firing cap 11 and the middle variable diameter channel 17, extending into the upper first groove 15. The energy storage spring 12 is sleeved on the outer periphery of the column 19 and is compressed by the top wall of the second groove 16 and the base 26 of the column 19 to complete energy storage. The locking component achieves safety by engaging the steel ball 21 in the horizontal through groove 20 with the first groove 15. When the steel ball 21 is constrained by the rotation activation component, it is completely retracted into the through groove, and the column 19 can freely pass through the channel 17. When the steel ball 21 is activated and partially protrudes, its diameter is larger than the channel 17, thereby locking the column 19 and the firing pin 18 in the first groove 15. Through the mechanical interlock between the variable diameter channel 17 and the steel ball 21, combined with the pre-compression of the energy storage spring 12, a stable ready-to-fire state is formed. After the steel ball 21 retracts, the column 19 can freely pass through the channel 17, and the spring release pushes the firing pin to strike at high speed to complete the firing. The introduction of the rotation activation component allows locking / unlocking to be completed by rotation operation, which improves safety and controllability. Locking is completed by rotation, and the locking is more stable, eliminating concerns about accidental firing due to impact, thus improving safety. At the same time, the entire device has a simple structure and is easy to operate. The entire assembly process is highly compatible with the mechanical logic of the device, and the tooling and rotation operation ensure that the locking mechanism is accurately positioned. Sampling verification directly simulates actual firing, ensuring consistency in mass production. The entire assembly process is simple and has fewer steps, which facilitates automated mass production, greatly reducing production steps and increasing production capacity.

[0039] It should be noted that the connection relationships of components not specifically mentioned in this application are all assumed to be based on existing technology. Since they do not involve the inventive point and are commonly used in existing technology, the structural connection relationships are not described in detail.

Claims

1. A mechanical firing device for a solid oxygen generator, characterized in that, The device includes a firing cap (11), a storage spring (12), a firing pin holder (13), and a firing base (14). The firing cap (11) includes a first groove (15) at the upper end and a second groove (16) at the lower end. A narrower channel (17) is provided between the first groove (15) and the second groove (16). The firing pin holder (13) includes a firing pin (18) at the bottom end and a column (19) connected to the firing pin (18). The storage spring (12) is sleeved on the outer periphery of the column (19) and abuts against the top wall of the second groove (16) at its upper end. The column (19) extends upward from the second groove (16) through the channel (17) into the first groove (15). The energy storage spring (12) is compressed between the column (19) and the second groove (16). A locking assembly is provided between the column (19) and the first groove (15). The locking assembly includes a horizontal through groove (20) at the upper end of the column (19). Steel balls (21) are symmetrically arranged in the horizontal through groove (20). The steel balls (21) are partially embedded in the first groove (15). The column (19) is provided with a mechanism to facilitate the energy storage spring (12). The steel ball (21) is fully inserted into the horizontal through groove (20) of the rotation activation component. The rotation activation component includes a torsion bar (22) rotatably connected to the center of the column (19). The torsion bar (22) passes through the middle of the horizontal through groove (20) and both ends abut against the steel balls (21) on both sides. A set of first abutment surfaces (23) and a set of second abutment surfaces (24) are symmetrically provided on the torsion bar (22) at the steel balls (21). The distance between the two first abutment surfaces (23) is smaller than the distance between the two second abutment surfaces (24), and the two steel balls (21) on both sides plus the two second abutment surfaces The distance between the surfaces (24) is greater than the diameter of the channel (17), and the distance between the steel balls (21) on both sides plus the two first contact surfaces (23) is not greater than the diameter of the channel (17). The upper part of the torsion bar (22) is provided with an arc-shaped torsion ring (25). The torsion ring (25) and the first contact surface (23) are on the same horizontal plane. The column (19) is provided with a base (26) extending outward at the firing pin (18). The base (26) slides against the second groove (16). The upper end surface of the base (26) is connected to the bottom end of the energy storage spring (12).

2. The mechanical firing device for a solid oxygen generator according to claim 1, characterized in that, Both the first contact surface (23) and the second contact surface (24) are provided with recesses that are adapted to the steel ball (21).

3. The mechanical firing device for a solid oxygen generator according to claim 1, characterized in that, The outer periphery of the firing cap (11) and the inner periphery of the firing base (14) are both provided with threads, and the outer periphery of the firing cap (11) and the inner periphery of the firing base (14) are screwed together by the threads.

4. An assembly process for a mechanical firing device of a solid oxygen generator, characterized in that, The mechanical firing device according to any one of claims 1 to 3 comprises the following steps: Step S1: Collect parts and perform quality sampling inspection on each part; Step S2: Pre-install the firing pin seat (13), load the steel ball (21) along the horizontal through groove (20), and fit the energy storage spring (12) around the outer periphery of the column (19); Step S3: Press the firing cap (11) against the firing pin seat (13); Step S4: Rotate the torsion bar (22) to lock the device; Step S5: Sample assembly of the firing cap (11) and firing base (14) to verify the firing effect.

5. The assembly process of the mechanical firing device for a solid oxygen generator according to claim 4, characterized in that, In step S2: the torsion bar (22) is inserted into the cavity of the upper column (19) of the firing pin seat (13), and at the same time, the steel ball (21) is pushed into the horizontal through groove (20), and the energy storage spring (12) is fitted into the column (19), with the lower end of the energy storage spring (12) abutting against the chassis (26).

6. The assembly process of the mechanical firing device for a solid oxygen generator according to claim 4, characterized in that, In step S3, the pressing of the firing cap (11) and the firing pin seat (13) includes the following process: the torsion bar (22) along with the firing cap (11) is embedded in the fixture and fixed; the firing pin seat (13) is set directly below the firing cap (11) and fixed by the fixture; the reciprocating mechanism drives the fixture and pushes the firing cap (11) down; the energy storage spring (12) at the upper end of the column (19) enters the second groove (16) and continues to compress; at this time, the firing pin seat (13) extends from the second groove (16); the torsion bar (22) is embedded in the column (19); at the same time, the upper end of the column (19) passes through the channel (17) and enters the first groove (15); the torsion bar (22) passes through the horizontal through groove (20) and squeezes out the two steel balls (21); the torsion bar (22)... 2) The upper steel ball (21) abuts against the first contact surface (23), and the energy storage spring (12) is compressed to the corresponding stroke. In step S4, the torsion bar (22) is twisted 90° to cause the second contact surface (24) to abut against the steel ball (21), causing the two steel balls (21) to move in opposite directions along the horizontal through groove (20) and finally partially extend into the horizontal through groove (20) to abut against the first recess (15). At this time, the fixing fixtures of the firing pin seat (13) and the firing cap (11) are released. Since the second contact surface (24) and the steel ball (21) remain stable, the steel ball (21) is engaged with the first recess (15), and the upper end of the column (19) together with the steel ball (21) is fixed in the first recess (15) to achieve device locking and energy storage.

7. The assembly process of the mechanical firing device for a solid oxygen generator according to claim 4, characterized in that, In step S5, the firing cap (11) and the firing base (14) are fixed by screwing together. After completion, the torsion bar (22) is twisted 90°. At this time, the second contact surface (24) rotates to the first contact surface (23). The first contact surface (23) contacts the steel ball (21). The steel ball (21) enters the horizontal through groove (20) under the squeezing force of the first groove (15). The energy storage spring (12) extends and releases the stored energy. The upper end of the column (19) and the horizontal through groove (20) move quickly down along the channel (17). The firing pin seat (13) and the bottom firing pin (18) move quickly down to the firing base (14) to complete the firing of the device.

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