EP2940421B1 - Tilting lever igniter - Google Patents

Description

The invention relates to a rocker arm detonator with a detonator head, which comprises a pivotably arranged firing pin acted upon by a firing pin spring, and with a safety bracket that moves in the same direction of rotation as the firing pin from a starting position in which it is pressed in the direction of the firing head into a Firing pin release position is pivotably arranged.

Such rocker arm igniter are for example from the DE-AS 1 289 765 known and are commonly used for projectiles, especially for hand grenades. The firing of the rocker arm igniter occurs when a firing pin which is pre-tensioned by a spring and which is held in the tensioned state by the safety bracket. The safety bracket is attached to one side of the detonator head and locked in its rest position on the detonator head by means of a removable safety splint.

More rocker arms describe the BE 50 53 24 , FR 625 278 , FR 799 440 , FR 2 432 153 , FR 2 500 621 , US4333401A as FR 601 185 , some of which are concerned with reinsurance. A hand grenade with an ignition delay can also use the CH 379 966 A5 can be removed. the FR 628 604 A describes a rocker arm igniter, wherein a rotatable profile part engages the rocker arm laterally on the housing. With the FR 2 825 462 A1 In addition, a rocker arm fuse with a fuse head is described, which comprises a safety mechanism that enables relocking and arming. This securing mechanism comprises at least one profile part which is rotatably mounted and which has an active means as a securing means. A re-fuse for a rocker arm igniter also describes the DE 10 2010 021 685 B4 .

One disadvantage of the known rocker arm detonators is that the firing pin spring is also pretensioned when the rocker arm detonator is not being used as intended, that is, when the hand grenade using the rocker arm detonator is not in use. This is because unintentional triggering of the detonator (for example by unintentional pulling of the safety pin) is significantly promoted.

The invention is based on the object of specifying a rocker arm igniter in which unintentional ignition is reliably avoided before it is used as intended.

This object is achieved according to the invention by the features of claim 1. Further, particularly advantageous embodiments of the invention are disclosed in the subclaims.

The invention is essentially based on the idea that when the toggle fuse is not in use, the firing pin spring should be in its untensioned state and can be tensioned by a separate tensioning lever as soon as the throwing body containing the toggle fuse is used as intended (unstored energy fuze head).

For this purpose, the tensioning lever, which can be actuated from a rest position to an armed position, is connected to the firing pin spring on the firing head of the rocker arm via a tensioning lever shaft, in such a way that the firing pin spring can only be operated from its unstressed state into its tensioned state and the firing pin spring in their tensioned state can be locked by means of a safety device.

Since the firing pin spring is in its relaxed state when the rocker arm igniter is not in use, a cotter pin can advantageously be dispensed with in the rocker arm igniter according to the invention.

In order to ensure that the firing pin spring can only be tensioned when the safety bracket is in its starting position, it has proven to be useful if the safety bracket carries a cam that engages in a guide groove of the tensioning lever, such that the tensioning lever only then fits into its Focus can be actuated, when the safety bracket is held in its starting position and that the guide groove releases the cam in the armed position of the clamping lever, so that the safety bracket can be pivoted into the firing pin release position.

The firing pin spring can preferably be a leg spring guided through the tensioning lever shaft, the first leg of which is connected to the tensioning lever shaft and the second leg of which is connected to the firing pin.

The safety device for securing the firing pin spring in its tensioned position preferably comprises a disk-shaped locking wheel which is connected to the tensioning lever shaft in a rotationally fixed manner and which contains at least one first locking groove on its outer circumference, and a locking arm which is pivotably arranged about an axis of rotation, the axis of rotation of the locking arm being parallel to the Tensioning lever shaft is arranged and the locking arm has a latching element at its end facing away from the axis of rotation, which is pressed by a pretensioned spring against the outer circumference of the locking wheel, so that the latching element when the tensioning lever is armed - and thus the tensioned state of the firing pin spring - into the second locking groove of the locking wheel engages.

Advantageously, a first locking groove is arranged on the outer circumference of the locking wheel, such that in the rest position of the clamping lever the locking element of the locking arm engages in the first locking groove of the locking wheel and the clamping lever is thereby secured in the rest position.

In order to relax the tensioned firing pin spring again in a simple manner when the use of the corresponding projectile is no longer intended, it has proven to be advantageous if the safety device can be unlocked by an externally actuated release element, so that when the safety bracket is in its starting position when actuated of the relaxation element, the firing pin spring returns from its tensioned to its untensioned state.

The relaxation element can be a pressure or sliding element which, when actuated, acts on the end of the locking arm facing away from the axis of rotation, in such a way that the latching element of the locking arm emerges from the latching groove of the locking wheel arrives and the clamping lever is pivoted back from its armed position to its rest position by the pressure of the firing pin spring.

In order to be able to relax the relaxation element with the throwing hand that holds the safety bracket in its starting position, it has proven to be advantageous to arrange the relaxation element so that it can be actuated from the outside through a recess in the safety bracket.

In order to reliably avoid unintentional ignition of the rocker arm detonator before it is used as intended, it is provided that the firing pin spring is in its untensioned state when the rocker arm fuse is not in use and can be tensioned by a separate tension lever as soon as the rocker arm fuse is to be used as intended .

Fig. 1

die Explosionsdarstellung eines erfindungsgemäßen Kipphebelzünders mit Sicherungsbügel und Spannhebel;

Fig. 2

die Seitenansicht des Sicherungsbügels des in Fig. 1 dargestellten Kipphebelzünders aus der in Fig. 1 mit II bezeichneten Richtung;

Fig. 3

eine perspektivische Ansicht des Spannhebels des in Fig. 1 dargestellten Kipphebelzünders;

Fig. 4

eine Draufsicht auf den in Fig. 3 dargestellten Spannhebel;

Fig. 5 und 6

Seitenansichten des in Fig. 1 dargestellten Kipphebelzünders, wobei sich die Schlagbolzenfeder in ihrem entspannten Zustand befindet;

Fig. 7

eine perspektivische Ansicht des in Fig. 1 dargestellten Kipphebelzünders mit entspannter Schlagbolzenfeder und unter Weglassung des Sicherungsbügels;

Further details and advantages of the invention emerge from the following exemplary embodiment explained with reference to figures. Show it:

Fig. 1

the exploded view of a rocker arm igniter according to the invention with safety bracket and clamping lever;

Fig. 2

the side view of the safety bracket of the in Fig. 1 rocker arm fuse shown from the in Fig. 1 direction marked II;

Fig. 3

a perspective view of the tensioning lever of the in Fig. 1 shown rocker arm igniter;

Fig. 4

a top view of the in Fig. 3 illustrated clamping lever;

Figures 5 and 6

Side views of the in Fig. 1 rocker arm fuse shown, wherein the firing pin spring is in its relaxed state;

Fig. 7

a perspective view of the in Fig. 1 rocker arm fuse shown with relaxed firing pin spring and omitting the safety bracket;

Fig. 8-10 the Fig. 5-7 corresponding views, with the firing pin spring in its tensioned state.

In Fig. 1 1 denotes a rocker arm detonator according to the invention for a hand grenade reproduced in an exploded view. The rocker arm detonator 1 contains a detonator head 2. This comprises a pivotably arranged firing pin 4 acted upon by a firing pin spring 3 and a safety bracket 5 on which the firing pin 4 is supported. The securing bracket 5 is in the same direction of rotation as the firing pin 4 from a starting position in which it is for example manually pressed in the direction of the detonator head 2 (cf. also the Figures 5 and 6 as well as the Figures 8 and 9 ), arranged pivotably into a firing pin release position (not shown).

According to the invention, it is now provided that the firing pin spring 3 is not tensioned when the corresponding hand grenade is not in use, i.e. the firing pin 4 is supported on the safety bracket 5 in this case without pretensioning.

Rather, the firing pin spring 3 is only tensioned when the hand grenade carrying the rocker arm detonator 1 is to be used. For this purpose, on the left outer side 6 of the detonator head 2 there is a rest position ( Fig. 5-7 ) into focus ( Fig. 8-10 ) pivotable clamping lever 7 is arranged, which is non-rotatably connected to a clamping lever shaft 8 mounted in the detonator head 2. Arranged on this tensioning lever shaft 8 is the firing pin spring 3, designed as a cylindrical helical torsion spring (leg spring), the first leg 9 of which is connected to the tensioning lever shaft 8 and whose second leg 10 is connected to the firing pin 4, so that a rotation of the tensioning lever 7 is a rotation of the tensioning lever shaft 8 and thus the firing pin spring 3 is tensioned.

However, in order to tension the firing pin spring 3, it is imperative that the securing bracket 5 remains pressed. Otherwise, when the clamping lever 7 is actuated from its rest position to its armed position via the firing pin spring 3, the firing pin 4 and thus also the safety bracket 5 would be pivoted and locked in the direction of a projection 14, and the firing pin spring 3 would not be on the firing point the required preload can be tensioned.

As soon as the tensioning lever 7 is swiveled into its armed position with the locking bracket 5 pressed, the firing pin spring 3 is secured in this position by means of a safety device 11, so that when the tensioning lever 7 is released, the firing pin spring 3 does not automatically return to its relaxed state by turning the tensioning lever shaft 8 back.

In order to also ensure that the firing pin 4 can only jump forward when the firing pin spring 3 has sufficient tension for the firing process, i.e. the clamping lever 7 is already in the armed position, the safety bracket 5 carries a cam 12 ( Fig. 2 ), which is in a guide groove 13 of the clamping lever 7 ( Figs. 3 and 4 ) intervenes. This guide groove 13 has a first projection 14 and a second projection 25, which ensures that the clamping lever 7 can only be actuated into its armed position when the securing bracket 5 is also held in its starting position. Otherwise, the cam 12 of the securing bracket 5 would block the movement of the tensioning lever 7 after the tensioning lever 7 has been pivoted briefly.

After overcoming the projection 14 by pressing the securing bracket 5, the clamping lever 7 can be pivoted further and, if the pressure of the securing bracket 5 (again) is too low, engages the second projection 25 in its armed position and, after the armed position has been reached, releases through a corresponding recess 15 on the edge the cam 12 of the safety bracket 5 free so that the safety bracket 5 can be pivoted into the firing pin release position (as soon as the hand of the user of the hand grenade releases the safety bracket).

The securing device 11 comprises a disk-shaped locking wheel 16 which is connected to the tensioning lever shaft 8 in a rotationally fixed manner and which contains a second latching groove 17 on its outer circumference, and a locking arm 19 pivoted about an axis of rotation 18. The axis of rotation 18 of the locking arm 19 is parallel to the tensioning lever shaft 8, and the locking arm 19 has a latching element 20 at its end facing away from the axis of rotation 18. This locking element 20 is pressed by a pretensioned spring 21 against the outer circumference of the locking wheel 16, so that the locking element 20 when the clamping lever 7 is in focus - and thus the tensioned state of the firing pin spring 3 - into the second locking groove 17 of the Lock wheel 16 engages.

Like that Fig. 1 , 6th , 7th , 9 and 10 can be removed, a first locking groove 22 is arranged on the outer circumference of the locking wheel 16 such that in the rest position of the clamping lever 7 the locking element 20 of the locking arm 19 engages in the second locking groove 22 of the locking wheel 16 and thereby secures the clamping lever 7 in its rest position .

To ensure that when firing pin spring 3 ( Fig. 8-10 ) this can be relaxed again in a simple manner without the risk of igniting the corresponding hand grenade, the rocker arm detonator 1 comprises a relaxation element 23 End of the locking arm 19.

If, in the embodiment described here, the relaxation element 23 is moved downwards, for example, the latching element 20 of the locking arm 19 disengages from the second latching groove 17 of the locking wheel 16, and the tensioning lever 7 is pivoted back into its starting position by the pressure of the firing pin spring 3.

The invention is of course not restricted to the exemplary embodiment described above. For example, instead of a leg spring, a leaf spring can also be used as the firing pin spring, which is tensioned by a corresponding cam arranged on the tensioning lever shaft.

Instead of a slide, for example, a pressure element can also be used as a relaxation element, which presses the locking arm out of the latching groove of the locking arm.

List of reference symbols

1

Rocker arm igniter

2

Detonator head

3

Firing pin spring

4th

Firing pin

5

safety catch

6th

Outside

7th

Tension lever

8th

Clamping lever shaft

9

first leg (firing pin spring)

10

second leg (firing pin spring)

11

Protection scheme

12th

cam

13th

Guide groove

14th

first lead

15th

Recess

16

Locking wheel

17th

second locking groove

18th

Axis of rotation

19th

Locking arm

20th

Locking element

21

feather

22nd

first locking groove

23

Relaxation element

24

Recess

25th

second lead

Claims (8)

1. Rocker-arm igniter having an igniter head (2), which comprises a pivotably arranged striker (4) which is acted upon by a striker spring (3), and having a securing bracket (5), which is pivotably arranged in a striker release position, characterized in that the striker head (2) comprises a tensioning lever (7) which can be actuated from an inoperative position into a primed position and which is connected to the striker spring (3) by a tensioning lever shaft (8), that the striker spring (3) can be actuated from its untensioned state into a tensioned state and the striker spring (3) can be locked in its tensioned state by means of a securing device (11), wherein the securing device (11) contains a disk-shaped bolt wheel (16) connected to the tensioning lever shaft (8) in a non-rotatable fashion, which bolt wheel contains at least a first latching groove (22) on its outer periphery and comprises a locking arm (19) arranged so as to be pivotable about a rotational axis (18), wherein the rotational axis (18) of the locking arm (19) is arranged parallel to the tensioning lever shaft (8) and the locking arm (19) has a latching element (20) on its end facing away from the rotational axis (18), said latching element (20) being pressed by a pretensioned spring (21) against the outer periphery of the bolt wheel (16), so that the latching element (20) engages with a second latching groove (17) in the bolt wheel (16) when the tensioning lever (7) reaches the primed position - and therefore the tensioned state of the striker spring (3).
2. Rocker-arm igniter according to Claim 1, characterized in that the securing bracket (5) carries a cam (12) which engages with a guide groove (13) in the tensioning lever (7) in such a manner that the tensioning lever (7) can only be actuated into its primed position when the securing bracket (5) is held in its initial position, and that the tensioning lever (7) releases the cam (12) when the primed position is reached, so that the securing bracket (5) can be pivoted into its striker release position.
3. Rocker-arm igniter according to one of Claims 1 or 2, characterized in that the striker spring (3) is a leg spring guided by the tensioning lever shaft (8), the first leg (9) of which spring is connected to the tensioning lever shaft (8) and the second leg (10) of which spring is connected to the striker (4) .
4. Rocker-arm igniter according to one of Claims 1 to 3, characterized in that a first latching groove (22) is arranged on the outer periphery of the bolt wheel (16) in such a manner that when the tensioning lever (7) is in the inoperative position, the latching element (20) of the locking arm (19) engages with the first latching groove (22) of the bolt wheel (16) and thereby secures the tensioning lever (7) in its inoperative position.
5. Rocker-arm igniter according to one of Claims 1 to 4, characterized in that the securing device (11) can be released by a tension-relieving element (23) that can be actuated from outside, so that when the securing bracket (5) is in its inoperative position, when the tension-relieving element (23) is actuated, the striker spring (3) once again moves from its tensioned into its untensioned state.
6. Rocker-arm igniter according to one of Claims 1 to 5, characterized in that the tension-relieving element (23) is a pressure or slide element which, when actuated, acts on the end of the locking arm (19) which faces away from the rotational axis (18), in such a manner that the latching element (20) of the locking arm (19) is disengaged from the second latching groove (17) of the bolt wheel (16) and the tensioning lever (7) is pivoted back into its initial position by the pressure of the striker spring (3).
7. Rocker-arm igniter according to Claim 5 or 6, characterized in that the tension-relieving element (23) is arranged in such a manner that it can be actuated from outside through a recess (24) in the securing bracket (5).
8. Rocker-arm igniter according to one of Claims 1 to 7, characterized in that the securing bracket (5) is pivoted in the same direction of rotation as the striker (4) from its initial position, in which it is pressed in the direction of the igniter head (2), into the striker release position.

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