RU211011U1 - A device for ejecting a spent cartridge case - Google Patents

Abstract

The utility model relates to small arms, mainly to the ejection mechanisms of the shutter of small arms. SUBSTANCE: device for ejecting a spent cartridge case contains a spring-loaded ejector installed in the bolt on the axis with a hook interacting with the rim of the cartridge case, in the lower part of the ejector there is a hole of a closed contour, into which the ejector axis is installed. It is advisable that the interacting surface of the ejector hook is made to the plane of the rim of the sleeve at an angle that ensures the interaction of the hook with the rim in the area adjacent to the maximum diameter of the rim. The proposed utility model makes it possible to increase the durability and non-failure operation of the ejection mechanism of the shutter of small arms. 1 w.p. f-ly, 2 ill.

Description

The utility model relates to small arms, mainly to the ejection mechanisms of the shutter of small arms.

Known ejection mechanism shutter 7.62 mm Dragunov SVD sniper rifle (see Instructions on shooting. 7.62 mm Dragunov SVD sniper rifle, Military Publishing House of the USSR Ministry of Defense, Moscow, 1988), containing an ejector mounted on an axis in the shutter with a hook for gripping the sleeve, a socket for the spring and a cutout for the axle.

The disadvantage of this technical solution is the insufficient durability of the ejector in the area of the hook for capturing the sleeve, as well as the insufficient strength in the lower part of the ejector at the cutout for the ejector axis when using such a scheme in self-loading weapons, especially when firing with a silencer (quiet firing device).

A device for ejecting a spent cartridge case is known (RF patent No. 15394 dated 13.03.2000, IPC F41C 27/00), containing a spring-loaded ejector installed in the gate on an axis with a hook interacting with the rim of the cartridge case and a slotted hole for the axis.

The disadvantage of this technical solution is the insufficient strength of the ejector in the lower part in the place of the slotted hole for the ejector axis when using such a scheme in self-loading weapons, especially when firing with a silencer (quiet firing device).

The objective of the utility model is to increase the durability and reliability of the ejection mechanism.

The technical result consists in increasing the strength of the ejector by installing the ejector axis in a closed loop hole made in the ejector.

The problem is solved due to the fact that the device for ejecting the spent cartridge case contains a spring-loaded ejector installed in the shutter on the axis with a hook interacting with the rim of the cartridge case, in the lower part of the ejector there is a closed loop opening into which the ejector axis is installed.

It is advisable that the interacting surface of the ejector hook is made to the plane of the rim of the sleeve at an angle that ensures the interaction of the hook with the rim in the area adjacent to the maximum diameter of the rim.

The claimed utility model is illustrated by the following drawings, where:

in fig. 1 - general view of the ejection mechanism at the initial moment of extracting the cartridge case from the chamber;

figure 2 -general view of the ejector.

The device for ejecting a spent cartridge case contains an ejector 1 installed in the gate 2 on an axis 3, an ejector spring 4. The ejector 1 has a hook 5, a socket 6 for the spring 4, in the lower part of the ejector 1 there is a hole 7 of a closed loop for the axis 3. The barrel 9 with the chamber 10 is fixed in the receiver 8, in which the cartridge case 11 is located. The rim 12 of the sleeve is placed in the cup 13 of the shutter. The hook 5 of the ejector 1 is pressed against the sleeve 11 by the spring 4. The surface 14 of the hook 5 is located at an angle α>0º to the plane A of the lip 12 of the sleeve 11, so the interaction of the hook 5 with the lip 12 occurs in the area adjacent to the maximum diameter D of the sleeve 11. In this case, the value the angle β between the surface 14 of the hook 5 and the line B passing through the top of the flange 12 and the axis 3 must be less than 90º, which ensures reliable engagement of the hook 5 with the flange 12 of the sleeve. The ejector 1 has a hole 7 of a closed loop for installing the ejector axis 3, which ensures the strength of the ejector 1 in the lower part.

A device for ejecting a spent cartridge case works as follows. Before firing, the ejector hook 5 is located behind the rim 12 of the sleeve 11. After the shot is fired, the bolt 2 begins to move back together with the ejector 1. The ejector hook 5 interacts with the rim 12 with its surface 14, after which the sleeve 11 begins to move along with the bolt 2. Continuing to move back , the sleeve 11 bumps into the tooth of the reflector (not shown) and is thrown out of the receiver 8. When the shutter 2 reverses forward, the ejector hook 5, overcoming the resistance of the spring 4, jumps over the rim 12 of the sleeve. The weapon is ready for the next shot.

The proposed utility model makes it possible to increase the durability and non-failure operation of the ejection mechanism of the shutter of small arms.

Claims (2)

1. A device for ejecting a spent cartridge case, containing a spring-loaded ejector installed in the gate on the axis with a hook interacting with the rim of the cartridge case, characterized in that a closed loop hole is made in the lower part of the ejector, in which the ejector axis is installed. 2. The device according to claim 1, characterized in that the interacting surface of the ejector hook is made to the plane of the rim of the sleeve at an angle that ensures the interaction of the hook with the rim in the area adjacent to the maximum diameter of the rim.

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