US20060207150A1

US20060207150A1 - Firearm

Info

Publication number: US20060207150A1
Application number: US11/171,482
Authority: US
Inventors: Martin Werner
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-03
Filing date: 2005-07-01
Publication date: 2006-09-21
Also published as: DE102004032309A1; EP1612503A1; DE102004032309B4

Abstract

A firearm having at least a hammer which is mounted such that it can rotate about a rotation shaft, a firing rod with a firing spring, with the firing rod being mounted such that it can move with respect to the firing spring, in order to produce a spring force, with the firing rod being suitable at least for accelerating the hammer from a cocked position to a final position, which is suitable for transmission of the hammer energy to a firing pin, with the hammer furthermore being suitable at least for moving the firing spring against the spring force to a pushed-over position, which is beyond the final position, in which case the firing rod has a firing rod head which can interact with a stop on the hammer such that the shaft of the firing rod is pulled to the pushed-over position against the spring force by the movement from the final position.

Description

BACKGROUND OF THE INVENTION

The present invention relates to a firearm.
Firearms are known in which a hammer is used as one of a number of transmission elements for transmission of the firing energy to the firing cap. In this case a loaded spring provides the hammer with its energy that is required for the firing process. The spring is generally connected to the hammer with the aid of a connecting element, in particular with the assistance of a firing rod. Two types of firing rods are known for this purpose, so-called pulled and pushed firing rods.
A sprung end stop is also known, which allows the hammer to be pushed over its null position. This ensures that energy is transmitted without any impediment from the hammer to the firing pin, or directly to the firing cap.
Already known hammer systems with a pulled firing rod generally have a fixed end stop. In order to achieve the springing of the end stop for pulled firing rods, the hammer in these systems is generally separated from the firing rod, mechanically or by means of sprung additional elements.
One disadvantage that has been found in this context is the complex design of the hammer systems with a pulled firing rod and a sprung end stop.
This is the field of application of the invention, with an object being to provide a firearm which has a pulled firing rod and has a sprung end stop, but is nevertheless of simple and low-cost design.

SUMMARY OF THE INVENTION

According to the invention, this object is achieved by a firearm which has a firing rod head which can interact with a stop on the hammer, such that the shaft of the firing rod can be pulled to the pushed-over position against the spring force during the movement from the final position, it is possible to produce a pushed-over position of the hammer even for firearms with a pulled firing rod, while avoiding the need for further additional elements (springs, joints, levers, . . . ) for a pushed-over position of the hammer beyond the final position. The production and cost advantages which result from this are obvious.
A further advantageous refinement of the present invention provides for the firing rod head to have a groove which interacts with a supporting shaft on the hammer in such a way that the shaft of the firing rod is pulled to the cocked position when moved from the final position. This refinement of the firing rod head allows the hammer to pull the firing rod in an advantageous manner, for example without any further additional elements being required for this purpose, and to compress the firing spring, so that the acceleration of the hammer for the firing movement can be carried out by unloading the firing spring.
It is also advantageously possible to provide for the firing rod to have a shaft which extends from the firing rod head, with a spring stop being provided at the end of the shaft. A firing spring of suitable length and with suitable preloading can be fitted in an appropriate manner here.
In order to produce suitable transmission of a rotary movement of the hammer to a translational movement of the firing rod or to change a translational movement of the firing rod to a rotary movement of the hammer, it is also possible to provide for the stop to be arranged to the side of the rotation shaft or for the supporting shaft to be arranged to the side of the rotation shaft.
One advantageous refinement of the present firearm according to the invention provides for the firing rod head to clasp the rotation shaft. This results in a second opposing bearing point which, by interaction with the stop and the supporting shaft on the hammer, and the contact surface and the groove of the firing rod head, initiates a spring effect by pulling the firing rod.
Furthermore, it is advantageously possible to provide for the stop and the supporting shaft to be arranged on respectively opposite sides of the rotation shaft. This makes it possible to ensure that the firing rod head rests completely on the rotation shaft and/or the stop and the supporting shaft in a final position, in which case the firing rod can be pulled against the spring force during any given rotary movement.
In a further advantageous refinement of the present invention, it is possible to provide for the firing rod head to have a widened area which forms a circular curve which is suitable for at least partially surrounding the shaft and at the end forms a contact surface with which the stop on the hammer can make contact. A refinement of the firing rod head such as this advantageously allows the firing rod to be pulled from a final position to a pushed-over position by rotation of the hammer.
It is also advantageously possible to provide for the firing rod to be mounted such that it can move in an axial bearing on the housing side. This ensures secure guidance of the firing rod and of the shaft.
It is also, furthermore, advantageously possible to provide for the firing spring to be fitted between the axial bearing and the spring stop of the firing rod in an installed state. In addition to choice of a suitable firing spring, suitable choice of the shaft length allows a suitable torque profile to be produced for the hammer.
With the hammer in a final position, it is advantageously possible to provide for the circular curve to rest on the rotation shaft, and for the supporting shaft to rest on the end of the groove.
Furthermore, in a cocked position, it is possible to provide for the supporting shaft to rest on the end of the groove, with the circular curve being at a distance from the rotation shaft.
It is also advantageously possible to provide, in a pushed-over position, neither for the circular curve to rest on the rotation shaft nor for the supporting shaft to rest on the end of the groove, but for the contact surface to rest on the stop.

BRIEF DESCRIPTION OF THE DRAWINGS

Further features and advantages of the present invention will become clear from the following description of preferred exemplary embodiments and with reference to the attached figures, in which:
FIG. 1 shows a schematic view of a firearm according to the invention;
FIG. 2 shows a firing rod for a firearm according to the invention;
FIG. 3 shows an enlarged illustration of a firearm according to the invention with the hammer in a cocked position; and
FIG. 4 shows an enlarged illustration of a firearm according to the invention with the hammer in a pushed-over position.

DETAILED DESCRIPTION OF THE INVENTION

First of all, reference will be made to the embodiment in FIG. 1.
A firearm according to the invention essentially has a firing pin 12, a hammer 6 which is mounted on a rotation shaft 7, and a firing rod 4 with a firing spring 5. The firing rod 4 has a shaft 14 for holding the firing spring 5, with a spring stop 15 for the firing spring 5 being provided at the end of the shaft 14. The firing rod 4 also has a firing rod head 18, which has a groove 8 and a circular curve 13 as well as a widened area 10, with a contact surface 19 being provided at the end of the widened area 10. Apart from this, a supporting shaft 9 is provided on the hammer 6, alongside the rotation shaft 7.
FIG. 1 shows a firearm according to the invention with the hammer 6 in a final position 1. A spring force is applied to the firing rod 4 by the firing spring 5. The hammer 6 is supported on one side of its rotation shaft 7 in the end of the groove 8 in the firing rod 4 and on the supporting shaft 9 of the hammer 6. On the other side of the rotation shaft 7, the hammer 6 is supported between the widened area 10 of the firing rod 4 and the stop 11 on the hammer 6, by a contact surface 19 on the widened area 10 resting on the stop 11. These two bearing points, in particular the supporting shaft 9 and the stop 11 on the hammer 6, and the opposing bearing points, in particular the groove 8 and the widened area 10 on the firing rod 4, result in the hammer 6 initially being held in a final position 1. The bearing points, in particular the supporting shaft 9 and the stop 11 on the hammer 6, may in this case be firmly connected to the hammer 6, or may be attached to an additional element of the hammer 6.
FIG. 2 shows a firing rod 4 for a firearm according to the invention. The figure shows the elongated shaft 14, which is intended essentially for holding the firing spring 5. The spring stop 15 for holding the firing spring 5 can be seen at the end of the shaft 14. The firing rod head 18 has the groove 8, which is introduced into the firing rod head 18 with a predetermined position, length and alignment. The circular curve 13 also has a shape that is matched to the rotation shaft 7. The contact surface 19, which is required for operation by the stop 11 on the hammer 6, is provided at the end of the circular curve.
FIG. 3 shows how the hammer 6 is located in a cocked position 2. In this case, the hammer 6 is rotated about its rotation shaft 7 with respect to the position 1. In this case, the hammer 6 engages with the firing rod 4. Via the bearing points, in particular via the first groove 8 and the supporting shaft 9, the firing rod 4 exerts a force or lever effect on the hammer 6. In conjunction with the distance between the bearing pair, in particular the first groove 8 and the supporting shaft 9, and the rotation point 7, this results in a torque which acts on the hammer 6. This torque produces the firing movement of the hammer 6.
FIG. 4 now shows a hammer 6 in a pushed-over position 3. In this position, the hammer 6 emits the firing energy directly to the firing pin 12 or to the firing cap (not illustrated). During this process, the hammer 6 is rotated in the opposite direction to the cocking direction. During this process, the contact surface 19 on the firing rod 4 is supported on the stop 11 on the hammer 6. On the opposite side of the rotation shaft 7 of the hammer 6, the bearing shaft 9 for the hammer can slide freely in the groove 8 in the firing rod 4. This results in a resetting torque in the direction of the final position 1 of the hammer 6.
As can be seen from FIGS. 1 to 4, the firearm has a housing 17, with the firing rod 4 and its shaft 14 being held such that they can move in an axial bearing 16 on the housing side. The firing spring 5 surrounds the shaft 14 between the spring stop 15 and the axial bearing 16. The spring force which in principle pulls the firing rod head 18 in the direction of the axial bearing 16 and the shaft 14 of the firing rod 4 results in a so-called pulled firing rod 4. Corresponding to the pulling direction, the firing rod head 18 clasps the rotation shaft 7 and the supporting shaft 9, thus in principle allowing rotation of the hammer 6, although this must always be against the spring force in that the shaft 14 must be pulled out of the axial bearing, as a result of which the firing spring 5 is compressed, and acts as an energy store. This energy can be used on the one hand to produce a torque for the firing movement of the hammer 6, and on the other hand as a resetting torque from the pushed-over position 3. In both cases, the energy is built up by pulling the firing rod 4. The corresponding lever arm may, of course, be produced by the supporting shaft 9 and the stop 11 being at a suitable distance from the rotation shaft 7.
Overall, a second opposing bearing point is produced by the pulled firing rod 4 which, by virtue of its specific shape, in particular of the firing rod head 18, clasps the rotation shaft 7 of the hammer 6. This allows a final position which is sprung in both rotation directions of the hammer. This results in an advantageous firearm which combines the advantages of a pulled firing rod, which cannot be tilted, for example, with a position of the hammer 6 that can be pushed over.
The firearm according to the invention also results in further advantages. Based on the currently known prior art, pulled firing rods 4 are held in their final position 1 by a fixed stop. In order to ensure that the energy can be transmitted from the hammer 6 to the firing pin reliably when the hammer 6 swings over the final position, it is necessary for the hammer 6 to be separated from the firing rod in this area by additional elements (springs, joints, levers, . . . ), and then to be reset again to its final position 1. An arrangement based on the firearm according to the invention makes it possible to move over the final position 1 (in the pushed-over position) and to allow resetting, without any additional elements. The production and cost advantages that result from this are obvious.

Claims

1. A firearm comprising

a hammer) which is mounted such that it can rotate about a rotation shaft;

a firing rod with a firing spring, with the firing rod being mounted such that it can move with respect to the firing spring, in order to produce a spring force;

with the firing rod being suitable at least for accelerating the hammer from a cocked position to a final position, which is suitable for transmission of the hammer energy to a firing pin; with

the hammer being furthermore suitable at least for being movable against the spring force of the firing spring to a pushed-over position, which is beyond the final position;

wherein

the firing rod has a firing rod head which can interact with a stop on the hammer, such that the shaft of the firing rod is pulled to the pushed-over position against the spring force by the movement from the final position.

2. The firearm as claimed in claim 1, wherein the firing rod head has a groove which interacts with a supporting shaft on the hammer in such a way that the shaft of the firing rod is pulled to the cocked position when moved from the final position.

3. The firearm as claimed in claim 1, wherein the firing rod has a shaft which extends from the firing rod head, with a spring stop being provided at the end of the shaft.

4. The firearm as claimed in claim 1, wherein the stop (11) is arranged to the side of the rotation shaft.

5. The firearm as claimed in claim 2, wherein the supporting shaft is arranged to the side of the rotation shaft.

6. The firearm as claimed in claim 2, wherein the stop and the supporting shaft are arranged on respectively opposite sides of the rotation shaft.

7. The firearm as claimed in claim 1, wherein the firing rod head clasps the rotation shaft.

8. The firearm as claimed in claim 1, wherein the firing rod head has a widened area which forms a circular curve which is suitable for partially surrounding the rotation shaft and at the end forms a contact surface with which the stop on the hammer can make contact.

9. The firearm as claimed in claim 1, wherein the firing rod is mounted such that it can move in an axial bearing on the housing side.

10. The firearm as claimed in claim 1, wherein the firing spring is fitted in an installed state between the axial bearing and the spring stop on the firing rod.

11. The firearm as claimed in claim 1, wherein, in a final position, the circular curve rests on the rotation shaft and the supporting shaft rests on the end of the groove.

12. The firearm as claimed in claim 1, wherein, in a cocked position, the supporting shaft rests on the end of the groove, with the circular curve being at a distance from the rotation shaft.

13. The firearm as claimed in claim 1, wherein, in a pushed-over position, neither does the circular curve rest on the shaft nor does the supporting shaft rest on the end of the groove, but the contact surface rests on the stop.