JPH0113280Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a fuse for bullets that detonates or ignites the explosive charged in the bullet at a desired time or under desired circumstances.

Conventionally, this type of bullet fuse includes an ignition tube that detonates or ignites the explosive of the bullet instantaneously or with some delay when the bullet hits;
There are time-limited fuzes that activate a time-limiting mechanism to cause the explosives in a bullet to explode or ignite after a predetermined period of time, and double-acting fuzes that have both firing and time-limiting functions. Conventionally, such fuses have each been equipped with a safety mechanism to prevent unexpected accidents from occurring. Such safety mechanisms utilize external forces such as acceleration and centrifugal force that the bullet receives during flight to release the safety.

However, all of these conventional safety mechanisms have complicated configurations, have low safety reliability, and can only be applied to specific flying objects; for example, they cannot be applied to flying objects that do not rotate. However, it had drawbacks such as being expensive.

Therefore, the object of this invention is to obtain a bullet fuse equipped with a safety mechanism that does not have such drawbacks. It is an object of the present invention to provide a fuse for bullets that is simple in construction, highly reliable, inexpensive, and has a wide range of applications.

The fuse for bullets according to this invention has an inflow hole at the tip through which air flows in during flight, and a vibrating member that vibrates by the air that flows in from the inflow hole is disposed inside. A power generating mechanism is provided which converts the mechanical vibration of the vibrating member into electrical energy using the power generating mechanism, and a safety mechanism is provided which operates using the electrical energy generated by the power generating mechanism as a power source.

Hereinafter, the bullet fuse according to this invention will be explained in detail based on the illustrated embodiment.

FIG. 1 is an embodiment of this invention, and shows a sectional view of a bullet fuse according to this invention. Code 1 in the diagram
The one shown is the previous case. Before that, case 1
The main body part 2 has a parts storage space 2a inside and the diameter decreases secondarily toward the front, and a plurality of through holes 3 are provided at the tip of the main body part 2 between the main body part 2 and the main body part 2. The jawed tip portion 4 is integrally formed with the
It consists of At the center of the tip 4 is an inflow hole 6 having a step 5 with a rearwardly enlarged diameter in the middle.
A nozzle 7 is fixed to the enlarged diameter portion of the inflow hole 6. The nozzle 7 has a cylindrical shape with a bottom, and its opening side is inserted into the enlarged diameter portion of the inflow hole 6, and its bottom 7a side protrudes into the component storage space 2a of the main body 2 and is fixed. The inner diameter of the nozzle 7 is equal to the narrow diameter portion of the inflow hole 6 described above, and the nozzle 7 is disposed so that its center coincides with the narrow diameter portion as shown in the figure. The nozzle 7 has a plurality of small holes 7b on its outer periphery near the bottom 7a.
can be opened. Further, an annular groove 7c is cut into the thick cylindrical portion of the nozzle 7 from the bottom 7a side and communicates with the small holes 7b. Such a nozzle 7
The sound tube 8 is placed at the extended position of the cylindrical portion with its centers coincident with each other. The sound tube 8 extends forward from the base body 9 within the component storage space 2a. Base body 9
is fixed at the rear of the component storage space 2a.
A diaphragm 10 is attached within the base body 9. This diaphragm 10 is an example of a vibrating member in this invention, and is arranged at the bottom of the sound tube 8 with its peripheral edge fixed to the base 9. And the diaphragm 1
The power generation mechanism 11 is formed using 0. The power generating mechanism 11 includes a coil 13 wound around an iron core 12 arranged behind a diaphragm 10, and an annular permanent magnet 14 magnetized in the axial direction around the outer periphery of the coil 13. , the whole is fixed within the base body 9. A safety mechanism 15 is arranged behind such a power generation mechanism 11. The safety mechanism 15 includes a control section 16 electrically connected to the coil 13 described above;
S&A device 17 controlled by the control section 16
and is housed in the sleeve 18. A booster cap 19 is provided behind the safety mechanism 15 and attached to the sleeve 18, and a booster 20 is housed within the booster cap 19.

A bullet fuse as described above is attached to the warhead of a bullet. When the bullet is fired, air flows in from the inflow hole 6 at the tip of the fuze in the direction of arrow a in the figure. The air enters the annular structure 7c from the inflow hole 6 through the small hole 7b of the nozzle 7, and flows out toward the sound tube 8 from the annular groove 7c.
The air that has entered the sound tube 8 vibrates within the sound tube 8, causing the diaphragm 10 of the power generation mechanism 11 to vibrate. Vibration plate 1
When 0 vibrates, a current is generated in the coil 13, converting the mechanical vibration into electrical energy.
The electrical energy is transmitted to the control unit 1 of the safety mechanism 15.
The S&A device 17 is activated by operating the control unit 16 to release the safety and detonate the electric detonator for exploding the bullet.

Figure 2 shows another embodiment of this invention, where A is a sectional view of the bullet fuse according to this invention, and B is its B-
A longitudinal sectional view taken along line B is shown. In the bullet fuse shown in FIG. 2, the diaphragm 10 of the bullet fuse shown in FIG.
In place of the power generation mechanism 11 consisting of the iron core 12, coil 13 and permanent magnet 14, a piezoelectric element 2 is installed on the diaphragm 21.
This uses a power generation mechanism 23 to which 2 is fixed.
That is, in the bullet fuse shown in FIG. 2, a diaphragm 21 similar to that shown in FIG. A plate-shaped piezoelectric element 22 is fixed, and the piezoelectric element 22 and the control section 16 are connected by a lead wire 25. Therefore, in the bullet fuse shown in FIG. 2, when a bullet is fired and the diaphragm 21 vibrates, a current is generated in the lead wire 25, and the mechanical vibration is converted into electrical energy. The electrical energy is then used as a power source for a safety mechanism 23 consisting of a control section 16 and an S&A device 17 similar to those shown in FIG. In other parts of FIG. 2, the same reference numerals used for corresponding parts in FIG. 1 are used as they are.

FIG. 3 is still another embodiment of this invention, and shows a partial sectional view of a bullet fuse according to this invention. In the bullet fuse shown in Fig. 3, the front case 25
A base body 26 is fixed in front of the internal parts storage space 25a, and is communicated with the inflow hole 25b of the front case 25 to define a semicircular operating space S. In the operating space S, a piezoelectric element piece 28 that constitutes the power generation mechanism 27 is supported. The piezoelectric element piece 28 is an example of a vibrating member in this invention, and has a distal end close to the inside of the inflow hole 25b and a proximal end held by the base body 26. A lead wire 29 is connected to the base end of the piezoelectric element piece 28 . The lead wire 29 is connected to a safety mechanism (not shown). Note that the reference numeral 25c in the figure is a through hole, which discharges the air that has flowed into the working space S from the inflow hole 25b to the outside.

The bullet fuse shown in FIG. 3 is attached to the warhead of a bullet, and when the bullet is fired, air flows in from the inflow hole 25b, and the air flows into the power generating mechanism 2.
By vibrating the piezoelectric element piece 28 of No. 7, the lead wire 29
A current is generated to convert the mechanical vibration of the piezoelectric element piece 28 into electrical energy, and the electrical energy is used as a power source for a safety mechanism (not shown).

FIG. 4 is still another embodiment of this invention, and shows a partial sectional view of a bullet fuse according to this invention. The bullet fuse shown in FIG. 4 has almost the same configuration as the bullet fuse shown in FIG. , a conical working space S' is defined in front of it in communication with the inflow hole 30b of the front case 30, and a power generation mechanism 32 is configured in the working space S' similarly to the embodiment shown in FIG. The base end of the piezoelectric element piece 33 is held by the base body 31 described above. The piezoelectric element piece 33 is also an example of the vibrating member in this invention, and its tip is connected to the inflow hole 30b.
Supported close to the inside. The piezoelectric element piece 3
A lead wire 34 is connected to the base end of 3, and the lead wire 34 is connected to a safety mechanism (not shown). Therefore, similar to the bullet fuse shown in Figure 3,
In the bullet fuse shown in FIG. 4, air flows into the operating space S' from the bullet inflow hole 30b, the piezoelectric element piece 33 is vibrated by the air, and a current is generated in the lead wire 34. That is, the power generation mechanism 3
2 converts mechanical vibration into electrical energy, and the electrical energy operates the safety mechanism.

FIG. 5 shows yet another embodiment of this invention. In the embodiment shown in FIG.
Similar to the embodiment shown in FIGS. 1 and 2,
It consists of a main body part 36 and a jawed distal end part 38 that is integrally formed at the distal end of the main body part 36 through a plurality of through holes 37 . Then, the base body 39 is fixed in the component storage space 36a in the main body part 36, and an operating space S'' is created in front of the base body 39, which communicates with the inflow hole 38a formed in the tip part 38. 39 to the cylindrical part 39 co-centered with the inlet hole 38a.
a protrudes, and piezoelectric element pieces 41 and 42 that constitute the power generation mechanism 40 are located outside the tip of the cylindrical portion 39a.
The tips of the two touch each other. Those piezoelectric element pieces 41, 4
2 is an example of the vibrating member in this invention, and its base end is attached to the outer periphery of a cylindrical protrusion 38b that protrudes from the tip 38 into the working space S'' centering on the inflow hole 38a, and is supported oppositely. Lead wires 43 and 43 are connected to their proximal ends, respectively.
44 are attached, and their lead wires 43, 4
4 is connected to a rear safety mechanism (not shown). Therefore, in the bullet fuse shown in FIG. 5, air flows in from the inlet hole 38a during flight, and the air flows through the piezoelectric element pieces 41, 4, as in the above-described embodiments.
2 is vibrated, current flows through the lead wires 43 and 44, and the safety mechanism is activated.

The bullet fuse according to this invention is manufactured, for example, as described above. Therefore, the bullet fuse according to this invention has a much simpler structure than conventional fuses, so it is easy to manufacture and assemble, and is inexpensive. Furthermore, since there is no internal energy in the fuze before the bullet is fired, and the internal energy that activates the safety mechanism is generated only after the bullet is fired, the safety reliability is extremely high.
Furthermore, it has the advantage that it can be applied to all types of flying objects, including bullets that do not rotate.

[Brief explanation of the drawing]

FIG. 1 is an embodiment of this invention, and shows a sectional view of a bullet fuse according to this invention. FIG. 2 shows another embodiment of this invention, in which A shows a sectional view of a bullet fuse according to this invention, and B shows a longitudinal sectional view taken along the line B--B. FIG. 3 shows still another embodiment of this invention, and shows a partial sectional view of a bullet fuse according to this invention. FIG. 4 is still another embodiment of this invention, and shows a partial sectional view of a bullet fuse according to this invention. FIG. 5 is still another embodiment of this invention, and shows a partial sectional view of a bullet fuse according to this invention. 6, 25b, 30b, 30a...Inflow hole, 1
0, 21... diaphragm, 28, 33, 41, 42...
...Piezoelectric element pieces, 11, 23, 27, 32, 40...
...Power generation mechanism, 15...Safety mechanism, 16...Control unit, 17...S&A device.

Claims (1)

[Scope of utility model registration request] The tip has an inflow hole through which the air flows during flight, and a vibrating member that vibrates by the air flowing in from the inflow hole is disposed inside, and the vibrating member is used to generate mechanical vibrations of the vibrating member. A fuse for bullets is provided with a power generation mechanism that converts the energy into electrical energy, and a safety mechanism that is operated using the electrical energy generated by the power generation mechanism as a power source.