An electromechanical base-blast fuze for unmanned aerial vehicle (UAV) air-dropped bombs

Abstract

The application discloses a bottom electromechanical trigger fuse of unmanned aerial vehicle air-dropped bomb, mainly comprising a rotor arming mechanism, a needle firing mechanism, a linear power generation mechanism, a locking mechanism, a manual arming mechanism, a sliding block explosion-proof mechanism, a universal trigger switch, an electric ignition tube and a base, wherein the rotor arming mechanism is mainly located above the body and arranged along the fuse axis, the needle firing mechanism, the linear power generation mechanism and the locking mechanism are located on both sides of the rotor arming mechanism, the sliding block explosion-proof mechanism and the base are arranged below the rotor arming mechanism along the fuse axis, the universal trigger switch and the electric ignition tube are eccentrically arranged in the middle section of the body, and the manual arming mechanism is arranged for the sliding block explosion-proof mechanism. The fuse system is a self-contained independent system, has no structural, signal and energy correlation with the unmanned aerial vehicle system, is high in reliability, good in safety, low in cost, has self-destruction, absolute fire and electric firing energy dissipation characteristics, and is safe in explosive treatment.

Description

Technical Field

[0001] This invention belongs to the field of unmanned aerial vehicle (UAV) airborne munitions, and in particular relates to an electromechanical trigger fuse for the base of an UAV-dropped bomb. Background Technology

[0002] Typically, a single missile can cost millions of dollars, and even a relatively simple one costs tens of thousands of dollars, while drones are much cheaper. Drone-borne munitions, especially drone-borne air-dropped bombs, can significantly improve cost-effectiveness when used for target engagement. Therefore, improving drone-borne munitions systems is an urgent task.

[0003] Existing aerial bomb fuses are too bulky and unsuitable for use with small drones.

[0004] To understand the current development status of drone-dropped bomb fuses both domestically and internationally, a literature search was conducted using the CNKI database. This database translates Chinese search keywords into foreign language keywords for both Chinese and foreign language searches. There are 41 foreign language keywords. Searches using the keywords "drone" and "airdropped bomb," and "airdropped bomb" and "fuze," yielded no data. Searches using "drone" and "fuze" returned 2 Chinese dissertations, 4 Chinese journal articles, and 7 English journal articles, but none of these contained information on the structure and principles of drone-dropped bomb fuses. Summary of the Invention

[0005] The purpose of this invention is to provide an electromechanical trigger fuze for the base of an unmanned aerial vehicle (UAV) air-dropped bomb, offering a compact and convenient air-drop fuze for the development of UAV-borne munitions. This fuze is a self-contained, independent system, with no structural, signal, or energy dependencies on the UAV system, exhibiting high reliability and safety. It meets the requirements of GJB373B-2019 "Fuse Safety Design Criteria" and possesses self-destruct, anti-ignition, and electric ignition energy dissipation characteristics, ensuring safe handling of explosives.

[0006] The technical solution to achieve the purpose of this invention is as follows: an electromechanical trigger fuse for a drone-dropped bomb, mainly comprising a rotor-based safety release mechanism, a needle-punch ignition mechanism, a linear power generation mechanism, a locking mechanism, a manually released safety mechanism, a slider explosion-proof mechanism, a reverse-recovery mechanism, a universal trigger switch, an electric ignition tube, a base, an outer casing, a detonation tube, and an electronic control module. The manually released safety mechanism releases the safety before the bomb is inserted into the drone bomb drop tube. The rotor-based safety release mechanism functions as a transport safety pin before insertion into the bomb drop tube; after removing the transport safety pin, it functions as an airflow shield. This needs to be specifically considered in conjunction with the drone bomb drop tube design and will not be discussed further here. After insertion into the bomb drop tube, the inner wall of the tube constrains the slider, forming a contact safety mechanism. After the bomb is dropped from the bomb drop tube, the contact safety mechanism of the slider is released. During the bomb's descent, the rotor safety mechanism rotates and moves the attached safety bar upwards, releasing the needle-punch ignition mechanism. The needle-punch ignition mechanism ignites under the action of its energy storage spring. The ignition of its explosive element generates gas pressure that drives the magnetic core of the linear generator downwards, cutting the magnetic lines of force in the coil to generate electrical energy. This energy is stored in a capacitor in the electronic control module and used for electrical triggering and timed self-destruction. Simultaneously, the upward rotation of the safety bar releases the safety mechanism of the slider explosion-proof mechanism. The slider spring pushes the slider and its internal flame detonator to the alignment position, thus opening the ignition and detonation channels. After the bomb lands on the target or target area, the universal trigger switch closes, and the fuse detonates.

[0007] The significant advantages of this invention compared to existing technologies are:

[0008] (1) By connecting the rotor to the safety component, the lift generated by the airflow stirred up by the rotor during operation is cleverly used to release the safety, eliminating the need for additional components to release the safety and reducing the weight of the fuse.

[0009] (2) The fuze is a self-contained independent system, with no structural, signal, or energy connection to the UAV system, which facilitates the design of the UAV delivery mechanism, and ensures high reliability and safety. It meets the requirements of GJB373B-2019 "Fuze Safety Design Criteria", and has self-destruct, fire-resistant, and electric ignition energy dissipation characteristics, ensuring safe handling of explosives;

[0010] (3) Simple structure and low cost.

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 This is an axial cross-sectional view of the electromechanical trigger fuse for the bomb base of an unmanned aerial vehicle (UAV) bomb according to the present invention.

[0013] Figure 2This is a view from direction A of the electromechanical trigger fuze of a drone-dropped bomb according to the present invention.

[0014] Figure 3 This is a B-direction view of the electromechanical trigger fuze of a drone-dropped bomb according to the present invention.

[0015] Figure 4 This is a cross-sectional view of the electromechanical trigger fuze on the base of a drone-dropped bomb according to the present invention.

[0016] Figure 5 This is a cross-sectional view of the electromechanical trigger fuze DD of the bomb base of an air-dropped bomb according to the present invention.

[0017] Figure 6 This is a cross-sectional view of the electromechanical trigger fuze FF on the base of a drone-dropped bomb according to the present invention.

[0018] Figure 7 This is a cross-sectional view of the electromechanical trigger fuze GG on the base of a drone-dropped bomb according to the present invention.

[0019] Figure 8 This is a cross-sectional view of the electromechanical trigger fuze HH on the base of a drone-dropped bomb according to the present invention.

[0020] Figure 9 This is a cross-sectional view of the electromechanical trigger fuze JJ on the base of a drone-dropped bomb according to the present invention.

[0021] In the diagram, 1 is the main body, 2 is the rotor safety release mechanism, 3 is the needle ignition mechanism, 4 is the linear power generation mechanism, 5 is the locking mechanism, 6 is the manual safety release mechanism, 7 is the slider explosion-proof mechanism, 8 is the anti-recovery mechanism, 9 is the universal trigger switch, 10 is the electric ignition tube, 11 is the outer cover, 12 is the base, 13 is the detonation tube, 14 is the outer cover screw, 15 is the base screw, 16 is the connecting screw, and 17 is the electronic control module. 21 is the pressure screw, 22 is the rotor, 23 is the lower nut, 24 is the safety bar; 31 is the firing pin seat, 32 is the retaining ring, 33 is the firing pin spring, 34 is the safety ball, 35 is the firing pin, 36 is the needle detonator; 41 is the magnetic recoil linear motor, 42 is the pressure ring, 43 is the safety plate; 51 is the locking pin, 52 is the locking spring, 53 is the end cap; 61 is the locking pin, 62 is the spring washer; 71 is the slider spring, 72 is the flame detonator, 73 is the slider; 81 is the recovery cylinder, 82 is the recovery spring, 83 is the baffle; 131 is the reinforcing cap, 132 is the detonator charge, 133 is the detonator tube shell. Detailed Implementation

[0022] 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 a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] The following section will further introduce the specific implementation method, as well as the technical difficulties and inventive points of this invention, using this design example as an example.

[0027] Combination Figures 1-9An electromechanical trigger fuse for a drone-dropped bomb includes a body 1, a rotor release mechanism 2, a needle-punch ignition mechanism 3, a linear power generation mechanism 4, a locking mechanism 5, a manually released safety mechanism 6, a slider explosion-proof mechanism 7, a reverse-recovery mechanism 8, a universal trigger switch 9, an electric ignition tube 10, an outer cover 11, a base 12, a detonation tube 13, and an electronic control module 17. The key feature is that the body 1 serves as the base, with a first stepped hole along its central axis. The main body of the rotor release mechanism 2 is located above the body 1, and its lower part is positioned within the first stepped hole along the central axis of the body 1's inner cavity. The needle-punch ignition mechanism 3, the linear power generation mechanism 4, and the locking mechanism 5 are all located on the side of the rotor release mechanism 2. The needle-punch ignition mechanism 3 is connected by a screw... The nail 16 is fixed to the upper end of the body 1; the sliding block explosion-proof mechanism 7 and the base 12 are arranged from top to bottom in the bottom cavity of the body 1 along the axis of the body 1; the universal trigger switch 9 and the electric ignition tube 10 are eccentrically placed in the middle section of the body 1; a safety mechanism 6 for manually releasing the safety is provided for the sliding block explosion-proof mechanism 7, which ensures that the sliding block explosion-proof mechanism 7 is in the safe state under normal circumstances; the base 12 is connected to the blind groove at the lower end of the body 1 by four base screws 15, and two stepped holes are opened in the middle of the base 12, namely the second stepped hole and the third stepped hole. The detonation tube 13 is set in the second stepped hole, and the anti-recovery mechanism 8 is set in the third stepped hole; an outer cover 11 is provided on the outside of the body 1, which is connected to the body 1 by the outer cover screw 14; the electronic control module 17 is set in the cavity formed by the outer cover 11 and the body 1.

[0028] The rotor release mechanism 2 mainly includes a pressure screw 21, a rotor 22, a lower nut 23, a safety rod 24, and a body 1. The safety rod 24 is set along the fuse axis, and its upper section is connected to the needle ignition mechanism 3 by a thread. Its lower section is inserted into the central through hole of the slider explosion-proof mechanism 7, forming a safety for the slider explosion-proof mechanism, namely the rotor safety, to ensure that the slider explosion-proof mechanism 7 is in the explosion-proof state under normal conditions. The exposed part of the upper section of the safety rod 24 is screwed with the pressure screw 21, the rotor 22, and the lower nut 23, wherein the rotor 22 is pressed and fixed between the pressure screw 21 and the lower nut 23.

[0029] The needle-punching ignition mechanism 3 mainly includes a firing pin seat 31, a retaining ring 32, a firing pin spring 33, a safety ball 34, a safety rod 24, a firing pin 35, and a needle-punching detonator 36. The upper section of the safety rod 24 is connected to the firing pin seat 31 by a thread. The needle-punching detonator 36 is eccentrically disposed within the firing pin seat 31 along the axial direction. The firing pin seat 31 has a two-stage stepped blind hole leading from the outer wall of the firing pin seat 31 to the needle-punching detonator 36, and a through hole leading from the outer wall of the firing pin seat 31 to the inner cavity of the fuse's central axis. The two-stage stepped blind hole has a diameter from the outside to the inside of... The firing pin 35 is placed in the second-order hole, which decreases in size sequentially. The retaining ring 32 is placed in the first-order hole and fixed by spot riveting. The firing pin spring 33 is placed in the second-order hole, with one end abutting against the outer end face of the firing pin 35 and the other end abutting against the inner end face of the retaining ring 32. It is normally in a compressed state. The safety ball 34 is placed in the through hole and is pressed tightly by the firing pin spring 33 through the firing pin 35. Its outer wall surface is in close contact with the outer circumferential surface of the safety bar 24 and the conical shoulder of the firing pin 35. The safety bar 24 and the safety ball 34 constitute a safety for the firing pin 35.

[0030] The linear power generation mechanism 4 mainly includes a magnetic recoil linear motor 41, a pressure ring 42, a safety plate 43, a needle detonator 36, and a body 1. The magnetic recoil linear motor 41 consists of an armature and a magnetic core, and is eccentrically placed inside the body 1 and directly below the needle detonator 36. The pressure ring 42 is fitted onto the magnetic core of the magnetic recoil linear motor 41 and presses down on the armature. The safety plate 43 is placed directly below the magnetic recoil linear motor 41, and forms a safety device for the magnetic recoil linear motor 41 by means of the annular plane of the body 1.

[0031] The locking mechanism 5 mainly includes a locking pin 51, a locking spring 52, an end cap 53, and a body 1. A radial fourth-step hole is opened in the middle part 1 of the body. The fourth-step hole includes a third-step hole, a fourth-step hole, and a fifth-step hole with decreasing diameters from the outside to the inside. The locking pin 51 is set in the third-step hole and the fourth-step hole. One end of the locking pin normally rests against the outer circumference of the safety rod 24. During the operation of the fuse, the rotor 22 will drive the safety rod 24 to rotate and move upward. When it moves upward a certain distance and reaches the predetermined position, the locking pin 51 will be engaged in the annular notch of the safety rod 24 by the resistance of the locking spring 52, thereby locking and positioning the safety rod 24. The locking spring 52 is set in the fourth-step hole. One end of the locking spring 52 rests against the upper surface of the locking pin 51, and the other end rests against the lower surface of the end cap 53. The end cap 53 is set in the fifth-step hole and is fixed to the body 1 by spot riveting.

[0032] The explosion-proof sliding mechanism 7 mainly includes a sliding spring 71, a flame detonator 72, a sliding block 73, and a body 1. A radial sliding groove is formed at the lower part of the body 1, and the explosion-proof sliding mechanism 7 is disposed in the sliding groove. The left end of the sliding block 73 has a fifth-step hole from top to bottom. The fifth-step hole includes a sixth-step hole and a seventh-step hole with progressively increasing diameters from top to bottom. The flame detonator 72 is placed in the fourth-step hole and fixed by spot riveting. The right end of the sliding block 73 has a sixth-step hole perpendicular to the sliding groove and the fifth-step hole, including an eighth-step hole, a ninth-step hole, and a tenth-step hole. The eighth-step hole and the tenth-step hole have the same diameter, and the ninth-step hole has a smaller diameter than the other two steps. A limiting protrusion is formed in the sixth step hole; a central through hole is opened in the middle of the slider 73 from top to bottom, and the lower end of the safety rod 24 is usually inserted into the central through hole of the slider 73, forming a safety of the slider explosion-proof mechanism 7, namely the rotor safety; a blind hole is opened on the left end face of the slider 73, one end of the slider spring 71 abuts against the bottom of the blind hole on the left end face of the slider 73, and the other end abuts against the inner wall of the slider groove on the body 1; after the safety of the slider explosion-proof mechanism 7 is released, the slider spring 71 pushes the slider 73 and its internal flame detonator 72 to move towards the central axis of the fuse, so that the flame detonator 72 is aligned with the safety rod 24 above and the detonation tube 13 below, realizing the conduction of the ignition and detonation channels.

[0033] The manually released safety mechanism 6 mainly includes a locking pin 61, a spring washer 62, and a body 1. A radial locking pin hole is opened at the lower part of the body 1. The locking pin 61 is approximately hexagonal in shape and is connected to the locking pin hole on the body 1 by threads. A spring washer 62 is provided between the locking pin 61 and the body 1. In the assembled state, one end of the spring washer is inserted into the sixth step hole of the slider 73, which normally restrains the movement of the slider 73, forming another safety for the slider, namely the manual safety of the manually released safety. When the rotor release safety mechanism 2 is functioning normally, it can be manually released before the UAV takes off. In the event that the rotor release safety mechanism 2 is accidentally released, the slider 73, pushed by the slider spring 71, protrudes into its sixth step hole, locking the locking pin 61, and the fuse is in a fail-safe state, thereby ensuring safety.

[0034] The anti-recovery mechanism 8 mainly includes an anti-recovery cylinder 81, an anti-recovery spring 82, a baffle plate 83, and a body 1. The anti-recovery mechanism 8 is eccentrically placed in the third stepped hole of the base 12. The upper end of the anti-recovery cylinder 81 is close to the bottom surface of the slider 73. The baffle plate 83 is fixed to the lower part of the base 12 by spot riveting. The upper end of the anti-recovery spring 82 abuts against the bottom surface of the center hole of the anti-recovery cylinder 81, and the lower end abuts against the upper surface of the baffle plate 83. When the explosion-proof mechanism 7 of the slider is released and the flame detonator 72 is aligned with the detonation tube 13, the anti-recovery cylinder 81 of the anti-recovery mechanism 8 is aligned with the center through hole of the slider 73. Under the resistance of the anti-recovery spring 82, the anti-recovery cylinder 81 moves upward and is inserted into the center through hole of the slider 73, locking the slider 73 in the released explosion-proof position. This prevents the slider 73 from being impacted when it touches the ground and causing radial movement, which would lead to misalignment of the axis of the flame detonator 72 and the detonation tube 13, resulting in unreliable detonation transmission.

[0035] The electric ignition tube 10 is radially positioned along one side of the safety rod 24. The electric ignition tube 10 is controlled by a universal trigger switch 9 and an electronic control module 17 to ensure that after ignition, it outputs a high-temperature, high-pressure flame impulse, which reliably ignites the next-stage explosive element, the flame detonator 72, through the annular and central ignition channels on the safety rod 24. A shallow groove is provided above the slider 73 and at the bottom of the slider slot in the body 1. This groove does not affect the movement and guidance of the slider 73, but ensures that the high-temperature, high-pressure flame impulse transmitted through the pre-fabricated ignition channels on the safety rod 24 reliably ignites the flame detonator 72 in the slider 73 after the electric ignition tube 10 is ignited, regardless of whether it is aligned correctly. If it is ignited in an aligned state, it is a normal ignition. If it is ignited in an misaligned state, it is an insulated flame, still ensuring the safety of handling unexploded ordnance.

[0036] One universal trigger switch 9 is provided along the radial and axial directions of the body 1, and both are located inside the body 1, to reliably realize universal electric triggering.

[0037] The detonation tube 13 includes a reinforcing cap 131, a detonating charge 132, and a detonation tube shell 133. The detonation tube 13 is placed in the second stepped hole of the base 12 and is located directly below the safety rod 24. The longitudinal section of the detonation tube shell 133 is conical, and its shaped charge recess can form a jet, thereby improving the reliability of its detonation of the warhead charge. The detonating charge 132 is disposed inside the detonation tube shell 133, and the top surface of the detonation tube shell 133 is provided with a reinforcing cap 131.

[0038] The electronic control module 17 is placed in the cavity formed by the outer casing 11 and the body 1. Its energy storage element, such as a capacitor, can be used to store the electrical energy generated by the linear power generation mechanism 4 for safety control and ignition control, including electrically triggered ignition, timed self-destruction, and the self-disabling characteristic of the electronic control module 17.

[0039] Before being inserted into the drone bombing canister, the safety mechanism of rotor release mechanism 2 is the transport safety pin. After removing the transport safety pin and inserting the drone bombing canister, the airflow shielding is used. This needs to be considered in conjunction with the specific design of the drone bombing canister, and will not be discussed further here.

[0040] During the handling phase, potential impacts and vibrations, including drops and transport vibrations, will not alter the fuse's assembly state. The manual safety release mechanism 6 within the fuse is in the safe position. In this state, even if the needle detonator 36 accidentally ignites and explodes, it will not ignite the flame detonator 72 or the detonator 13, thus ensuring safety during the handling phase.

[0041] The working process of the electromechanical trigger fuze for the bomb base of an unmanned aerial vehicle (UAV) bomb described in this invention is as follows:

[0042] Screw the fuse onto the bomb body. Use an Allen wrench to manually remove the locking pin 61 of the manual safety release mechanism 6, releasing its restraint on the slider 73. Remove the transport safety pin from the rotor 22 and load the air-dropped bomb into the UAV bomb drop tube. The slider 73 of the bomb drop tube's inner wall, which then restrains the slide block explosion-proof mechanism 7, constitutes a bore-of-war safety.

[0043] After the bomb is released from the bomb launcher, the contact safety of the slider 73 is released. During the bomb's descent, the rotor 22 of the rotor safety mechanism 2 generates lift by stirring up airflow. When the lift generated by the rotor 22 is greater than the combined force of the weight of the bomb and the friction between the safety rod 24 and the firing pin seat 31 threaded pair, the rotor 22 will drive the safety rod 24 to rotate and rise together. When the safety rod 24 moves upward with the rotor 22 and reaches a specific position, that is, when the annular notch of the safety rod 24 is aligned with the radial travel of the locking pin 51 of the locking mechanism 5, the locking pin 51 will be engaged in the annular notch of the safety rod 24 under the resistance of the locking spring 52, thus locking and positioning the safety rod 24. Simultaneously, the needle ignition mechanism 3 is released and ignites under the resistance of its energy storage spring. The ignition of its explosive element generates gas pressure that drives the magnetic core of the linear power generation mechanism 4 to move downward. The magnetic core shears the safety plate 43, cutting the magnetic lines of force in the coil to generate electrical energy, which is stored in the energy storage element capacitor of the electronic control module 17 for electrical triggering and timed self-destruction. As the safety rod 24 rotates upward, the lower section of the rotor 22 releases its safety function on the slider 73. The slider 73 and its internal flame detonator 72 are then released by the slider spring 7. Under the action of 1, it moves to the alignment position, realizing the conduction of the ignition and detonation channels. At this time, the central through hole of the slider 73 is located directly above the anti-recovery mechanism 8. The anti-recovery cylinder 81 of the anti-recovery mechanism 8 moves upward under the resistance of the anti-recovery spring 82 and gets stuck in the central through hole of the slider 73. When the bomb falls towards the target or target area, the universal trigger switch 9 receives the signal, its internal circuit is connected, the electric ignition tube 10 ignites and outputs a high temperature and high pressure flame impulse, igniting the detonating explosive 132 in the detonation tube 13. The fuse completes the explosion output and detonates the explosive charge in the bomb body.

Claims

1. An electromechanical trigger fuse for a drone-dropped bomb, comprising a body (1), a rotor safety release mechanism (2), a needle-punch ignition mechanism (3), a linear power generation mechanism (4), a locking mechanism (5), a manually released safety mechanism (6), a sliding block explosion-proof mechanism (7), a reverse recovery mechanism (8), a universal trigger switch (9), an electric ignition tube (10), an outer casing (11), a base (12), a detonation tube (13), and an electronic control module (17), characterized in that: With the body (1) as the base, a first stepped hole is provided along its central axis. The main body of the rotor release mechanism (2) is located above the body (1), and the lower part of the rotor release mechanism (2) is set in the first stepped hole along the central axis of the inner cavity of the body (1). The needle ignition mechanism (3), the linear power generation mechanism (4), and the locking mechanism (5) are all located on the side of the rotor release mechanism (2). The needle ignition mechanism (3) is fixed to the upper end of the body (1) by connecting screws (16). The sliding block explosion-proof mechanism (7) and the base (12) are arranged from top to bottom in the bottom inner cavity of the body (1) along the axis of the body (1). The universal trigger switch (9) and the electric ignition tube (10) are eccentrically positioned. The body (1) is located in the middle section; a safety mechanism (6) for manually releasing the safety is provided for the sliding block explosion-proof mechanism (7) to ensure that the sliding block explosion-proof mechanism (7) is in the safe state under normal circumstances; the base (12) is connected to the blind groove at the lower end of the body (1) by four base screws (15), and two stepped holes are opened in the middle of the base (12), namely the second stepped hole and the third stepped hole. The detonation tube (13) is set in the second stepped hole, and the anti-recovery mechanism (8) is set in the third stepped hole; an outer cover (11) is provided on the outside of the body (1), which is connected to the body (1) by the outer cover screw (14); the electronic control module (17) is set in the cavity formed by the outer cover (11) and the body (1); The rotor release mechanism (2) includes a pressure screw (21), a rotor (22), a lower nut (23), a safety rod (24), and a body (1). The safety rod (24) is set along the fuse axis. Its upper section is connected to the needle ignition mechanism (3) by a thread, and its lower section is inserted into the central through hole of the sliding block explosion-proof mechanism (7), forming a safety for the sliding block explosion-proof mechanism, namely the rotor safety, to ensure that the sliding block explosion-proof mechanism (7) is in the explosion-proof state under normal conditions. The exposed part of the upper section of the safety rod (24) is screwed with a pressure screw (21), a rotor (22), and a lower nut (23), wherein the rotor (22) is pressed and fixed between the pressure screw (21) and the lower nut (23).

2. The electromechanical trigger fuze for the base of a drone-dropped bomb according to claim 1, characterized in that: The needle-punching ignition mechanism (3) includes a firing pin seat (31), a retaining ring (32), a firing pin spring (33), a safety ball (34), a safety rod (24), a firing pin (35), and a needle-punching detonator (36). The upper section of the safety rod (24) is connected to the firing pin seat (31) by a thread. The needle-punching detonator (36) is eccentrically disposed in the firing pin seat (31) along the axial direction. The firing pin seat (31) has a two-stage stepped blind hole that leads from the outer wall of the firing pin seat (31) to the needle-punching detonator (36), and a through hole that leads from the outer wall of the firing pin seat (31) to the inner cavity of the fuse's central axis. The two-stage stepped blind hole includes, from the outside to the inside, a... The first and second holes have successively decreasing diameters. The firing pin (35) is placed in the second hole, and the retaining ring (32) is placed in the first hole and fixed by spot riveting. The firing pin spring (33) is placed in the second hole, with one end abutting against the outer end face of the firing pin (35) and the other end abutting against the inner end face of the retaining ring (32). It is normally in a compressed state. The safety ball (34) is placed in the through hole and is pressed tightly by the firing pin spring (33) through the firing pin (35). Its outer wall surface is in close contact with the outer circumferential surface of the safety bar (24) and the conical shoulder of the firing pin (35). The safety bar (24) and the safety ball (34) constitute a safety for the firing pin (35).

3. The electromechanical trigger fuze for the base of a drone-dropped bomb according to claim 2, characterized in that: The linear power generation mechanism (4) includes a magnetic recoil linear motor (41), a pressure ring (42), a safety plate (43), a needle detonator (36), and a body (1). The magnetic recoil linear motor (41) is composed of an armature and a magnetic core, and is eccentrically placed in the inner cavity of the body (1) and located directly below the needle detonator (36). The pressure ring (42) is fitted on the magnetic core of the magnetic recoil linear motor (41) and presses down on the armature. The safety plate (43) is placed directly below the magnetic recoil linear motor (41) and forms a safety device for the magnetic recoil linear motor (41) by means of the annular plane of the body (1).

4. The electromechanical trigger fuze for the base of a drone-dropped bomb according to claim 3, characterized in that: The locking mechanism (5) includes a locking pin (51), a locking spring (52), an end cap (53), and a body (1); a radial fourth-step hole is opened in the middle of the body (1), and the fourth-step hole includes a third-step hole, a fourth-step hole, and a fifth-step hole with decreasing diameters from the outside to the inside. The locking pin (51) is set in the third-step hole and the fourth-step hole, and one end of it normally rests against the outer circumference of the safety rod (24). During the operation of the fuse, the rotor (22) will drive the safety rod (24) to move. 4) Rotate upwards. When it moves upwards a certain distance to reach the predetermined position, the locking pin (51) will be engaged in the annular notch of the safety bar (24) by the resistance of the locking spring (52), thereby locking and positioning the safety bar (24). The locking spring (52) is set in the fourth hole, with one end abutting against the upper surface of the locking pin (51) and the other end abutting against the lower surface of the end cap (53). The end cap (53) is set in the fifth hole and is fixed to the body (1) by spot riveting.

5. The electromechanical trigger fuze for the base of a drone-dropped bomb according to claim 4, characterized in that: The sliding block explosion-proof mechanism (7) includes a sliding block spring (71), a flame detonator (72), a sliding block (73), and a body (1); a radial sliding block groove is opened at the lower part of the body (1), and the sliding block explosion-proof mechanism (7) is set in the sliding block groove. The left end of the sliding block (73) has a fifth step hole from top to bottom. The fifth step hole includes a sixth step hole and a seventh step hole with increasing diameters from top to bottom. The flame detonator (72) is placed in the fourth step hole and fixed by spot riveting. The right end of the sliding block (73) has a sixth step hole perpendicular to the sliding block groove and the fifth step hole, including an eighth step hole, a ninth step hole, and a tenth step hole. The eighth step hole and the tenth step hole have the same diameter, and the ninth step hole has a smaller diameter than the other two steps. A limiting protrusion is formed inside the hole; a central through hole is opened in the middle of the slider (73) from top to bottom, and the lower end of the safety rod (24) is usually inserted into the central through hole of the slider (73), forming a safety of the slider explosion-proof mechanism (7), namely the rotor safety; a blind hole is opened on the left end face of the slider (73), one end of the slider spring (71) abuts against the bottom of the blind hole on the left end face of the slider (73), and the other end abuts against the inner wall of the slider groove on the body (1); after the safety of the slider explosion-proof mechanism (7) is released, the slider spring (71) pushes the slider (73) and its internal flame detonator (72) to move towards the central axis of the fuse, so that the flame detonator (72) is aligned with the safety rod (24) on top and aligned with the detonation tube (13) on the bottom, realizing the conduction of the ignition and detonation channels.

6. The electromechanical trigger fuze for the base of a drone-dropped bomb according to claim 5, characterized in that: The manual release mechanism (6) includes a locking pin (61), a spring washer (62), and a body (1). A radial locking pin hole is provided at the lower part of the body (1). The locking pin (61) is in the shape of an internal hexagonal bolt and is connected to the locking pin hole on the body (1) by a thread. A spring washer (62) is provided between the locking pin (61) and the body (1). In the assembled state, one end of the spring washer is inserted into the sixth step hole of the slider (73). Normally, it restricts the movement of the slider (73) and forms another safety for the slider, namely the manual release mechanism. When the rotor release mechanism (2) is functioning normally, it is manually released before the UAV takes off. In the event that the rotor release mechanism (2) is accidentally released, the slider (73) is pushed by the slider spring (71) and protrudes into its sixth step hole, locking the locking pin (61) in place. The fuse is in a fault-safe state, thus ensuring safety.

7. The electromechanical trigger fuze for the base of a drone-dropped bomb according to claim 6, characterized in that: The anti-recovery mechanism (8) includes an anti-recovery cylinder (81), an anti-recovery spring (82), a baffle (83), and a body (1); the anti-recovery mechanism (8) is eccentrically placed in the third stepped hole of the base (12), the upper end of the anti-recovery cylinder (81) is close to the bottom surface of the slider (73), the baffle (83) is fixed to the lower part of the base (12) by spot riveting, the upper end of the anti-recovery spring (82) abuts against the bottom surface of the center hole of the anti-recovery cylinder (81), and the lower end abuts against the upper surface of the baffle (83). The explosion-proof mechanism (7) of the slider is released... When the flame detonator (72) and the detonation tube (13) are aligned, the anti-recovery cylinder (81) of the anti-recovery mechanism (8) is aligned with the central through hole of the slider (73). Under the resistance of the anti-recovery spring (82), the anti-recovery cylinder (81) moves upward and gets into the central through hole of the slider (73), locking the slider (73) in the explosion-proof position to prevent the slider (73) from being impacted when it touches the ground and causing radial movement, which would lead to misalignment of the axis of the flame detonator (72) and the detonation tube (13), resulting in unreliable detonation transmission.

8. The electromechanical trigger fuze for the base of a drone-dropped bomb according to claim 7, characterized in that: The electric ignition tube (10) is radially arranged on one side of the safety rod (24). The electric ignition tube (10) is controlled by the universal trigger switch (9) and the electronic control module (17) to ensure that after ignition, it outputs a high temperature and high pressure flame impulse and reliably ignites the next-level explosive element, namely the flame detonator (72), through the annular and central fire transmission channels on the safety rod (24). A shallow groove is provided above the slider (73) and at the bottom of the slider groove of the body (1). It does not affect the movement and guidance of the slider (73), but it can ensure that the high temperature and high pressure flame impulse transmitted through the prefabricated fire transmission channel on the safety rod (24) after the electric ignition tube (10) is ignited can reliably ignite the flame detonator (72) in the slider (73), regardless of whether it is aligned. If it is ignited in the aligned state, it is normal ignition. If it is ignited in the misaligned state, it is extinguished fire, which can still ensure the safety of handling unexploded ordnance explosives.

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