EP1909059B1 - Projectile detonator - Google Patents

Description

The invention relates to a projectile fuze according to the preamble of claim 1.

Such a projectile fuse is used for example as a mortar fuse.

There are known projectiles with a so-called over-flying safety. Such overflight safety was introduced, for example, the detonator type ANNZ DM 74 as an electrical solution. This known Überflugsicherheit serves to make the projectile detonator over a larger portion of the projectile trajectory against interference attempts and / or against deception attempts of an opponent and against less common influences from outside and inside resistant. The so-called Bahnzerlegerrate is at such known projectile igniters at <10 ^-6 . This now allows you to use a projectile equipped with such a projectile launcher also over your own troops. This applies, for example, in exercises with projectiles that are equipped with such projectile lighters.

Realized is such electrical safety overflight in such a way that by means of an external programmer, the time of flight of the projectile is programmed into the detonator electronics ie fed. After the launch of the projectile, a timer / counter is started, which counts up to the programmed flight time minus a fixed time value and then charges an electrical ignition circuit of the ignition electronics. This charging of the ignition circuit is in the msec range, so that the projectile fuze is ready to fire in time in the specified target.

In the known bullet lighters of the type mentioned above, however, the securing device is designed such that after a very short in relation to the total trajectory very short time period, the mechanical interruption of the ignition chain is canceled, i. the so-called pre-pipe safety is comparatively small.

This problem is in the US 5693906 solved by a mechanical blockage of the release of the ignition, which is released only after a predetermined period of time. For this purpose, the igniter comprises a rotor which is held mechanically by a protruding nose of the rotor in its security. After the period of time, the nose is blasted off by a pyrotechnic force element from the rotor and the rotor is pushed into its release position, in which over-ignition of the ignition chain can take place.

From the EP 1 225 418 A1 a detonator for a hand grenade is known in which the ignition chain is also released by a timed pyrotechnic force element after expiry of a specified period of over ignition.

A firing chain with a puncture needle and a puncture detonator in a rotor of a detonator is from the US 3451340 known.

The invention is in the knowledge of these circumstances, the task of creating a projectile fuse of the type mentioned, which has a programmable electrical and mechanical safety overflight and a comparatively large Vorrohrsicherheit.

This object is achieved by the features of claim 1. Preferred embodiments or further developments of the projectile fuze according to the invention are characterized in the subclaims.

In the projectile fuse of the invention, the safety device is blocked by a pyrotechnic force element as long as, ie held in the security until the programmed or, if necessary, manually set flight time - minus a fixed time value (safety overflight) is reached. If the set flight time minus the set time value is reached, the ignition circuit for the power element is charged and the safety device by Igniting the force element unlocked. The safety device then goes into focus, ie the interruption of the ignition chain is canceled and the ignition chain is then inline. Now, the actual ignition circuit of the projectile fuze according to the invention is charged, so that the detonator in the intended destination is ready in time to fire.

Further details, features and advantages will become apparent from the following description of two illustrated in the drawings embodiments of the projectile fuse according to the invention.

Figur 1

eine schematische Darstellung einer Flugbahn eines Geschosses mit einem bekannten Geschosszünder,

Figur 2

eine der Figur 1 ähnliche Flugbahndarstellung eines Geschosses mit einem erfindungsgemäßen Geschosszünder,

Figur 3

einen Längsschnitt durch eine erste Ausführungsform des erfindungsgemäßen Geschosszünders, und

Figur 4

eine Längsschnittdarstellung einer zweiten Ausbildung des erfindungsgemäßen Geschosszünders.

Show it:

FIG. 1

a schematic representation of a trajectory of a projectile with a known projectile fuse,

FIG. 2

one of the FIG. 1 similar trajectory representation of a projectile with a projectile fuze according to the invention,

FIG. 3

a longitudinal section through a first embodiment of the projectile fuze according to the invention, and

FIG. 4

a longitudinal sectional view of a second embodiment of the projectile fuze according to the invention.

FIG. 1 illustrates a trajectory 10 of a conventional projectile fuse having projectile, wherein the arrow V denotes the Vorrohrsicherheit, the arrow U the overflight safety and the arrow T the flight time or target distance. With h the ignition height of the projectile fuze is designated.

FIG. 2 clarified in one of the FIG. 1 Similarly, the trajectory 10 of a projectile fuse having a projectile according to the invention, wherein the arrow V again denotes the mechanical Vorrohrsicherheit and the arrow T, the flight time or target distance. With H is in FIG. 2 denotes the ignition height of the projectile fuze. The arrow Ü also denotes in FIG. 2 the safety overpass, which is, however, an electrical / mechanical safety overflight, wherein the point S denotes the point of focus of the safety device of the projectile fuze.

FIG. 3 shows in a longitudinal sectional view of an embodiment of the projectile fuze 12 according to the invention, which has a pyrotechnic force element 14 which is interconnected with an ignition electronics, and blocks a safety device 16 until the flight time T minus a predetermined time value .DELTA.t (see FIG. 2 ) is reached. Once that is the case, an ignition circuit of the projectile fuze 12 is electrically charged and the safety device 16 is unlocked by igniting the pyrotechnic force element 14 in the armed position. In FIG. 3 the security of the security device is shown.

The securing device 16 has a rotor 18 with a firing pin 20 and with a puncture detonator 22. The firing pin 20 and the piercing detonator 22 are aligned with each other axially and are spaced from each other.

The projectile fuze 12 has an electric detonator 24, which is interconnected with the ignition electronics.

The projectile fuze 12 also has an booster charge 26 associated with the electric detonator 24. The rotor 18 is provided between the electric detonator 24 and the booster charge 26.

While in the in FIG. 3 drawn fuse the firing pin 20 and the puncture detonator 22 with the electric detonator 24 and the booster charge 26 are not inline, are the electric detonator 24, the firing pin 20, the tapping detonator 22 and the booster charge 26 in the focus of the projectile fuse 12 by appropriate rotation of the Rotor 18 by 180 ° in an axially aligned position, ie inline.

FIG. 4 clarified in one of the FIG. 3 a similar longitudinal sectional view of another embodiment of the projectile fuse 12 according to the invention, wherein like details with the same reference numerals as in FIG. 3 are designated, so that it is unnecessary, in conjunction with FIG. 4 to describe all these details again.

List of reference numerals:

10

trajectory

12

A fuse

14

pyrotechnic force element (from 12)

16

Safety device (of 12)

18

Rotor (from 16)

20

Firing pin (to 18)

22

Puncture detonator (at 18)

24

electric detonator (from 12)

26

Booster charge (out of 12)

Claims (2)

1. Projectile fuze having

   a) fuze electronics in which the time of flight (T) can be programmed,

   b) a timer/counter which counts up to the programmed time of flight (T) - minus a defined time value (Δt) - and then charges an electrical firing circuit,

   c) a mechanical safety and arming unit (16) has a rotor (18) with a fuze needle (20) and a piercing detonator (22), with the fuze needle (20) and the piercing detonator (22) being aligned with one another and being axially separated from one another, and which switches the firing chain, which has an electrical detonator (24), the firing needle (20), the piercing detonator (22) and a booster charge (26), to the armed position after a specific time interval,

   d) a pyrotechnic force element (14), which engages in the rotor (18), is interconnected with the fuze electronics and mechanically blocks the safety and arming unit (16) until the time of flight (T) minus the predetermined time value (Δt) is reached, after which the firing circuit is charged and the safety and arming unit (16) is unlocked to the armed position by initiation of the force element (14).
2. Projectile fuze according to Claim 1,
   wherein the fuze electronics are interconnected to the electrical detonator (24), which is separated from the booster charge (26), and wherein the rotor (18) is provided between the electrical detonator (24) and the booster charge (26).

Images