KR100208918B1 - Mechanism for controlling the firing rate of an automatic weapon - Google Patents

Abstract

A trigger mechanism for controlling the firing rate of a gun (10) capable of fully automatic fire. The trigger mechanism comprises a timing device (54, 56) which cyclically interrupts the gun bolt (14) and is incorporated in the gun. The timing device (54, 56) is actuated independently of forces generated by the discharge of the gun so that the bolt (14) periodically is arrested to reduce its natural cyclic rate of movement during automatic firing.

Description

Submachine gun with automatic firing and trigger mechanism and timing device

1 is a schematic side view, partly in cross section, of a submachine gun incorporating a trigger mechanism and a timing device in accordance with the present invention;

2 to 7 are schematic enlarged views showing the operation order of the trigger mechanism and the timing device,

8 is a plan view of the lever between the cam wheel and the upper operation of the timing device.

Referring to FIG. 1, the submachine gun 10 is provided with a breech 12, in which the bolt 14 (FIGS. 2 to 7) reciprocates within the gun portion. The wear plate surface may slide on the tail, which is shown by horizontal lines 13 in FIGS.

The operation of the bolt is indirectly controlled by the main inter-operation lever 16, the tip of which is pivotally mounted to the frame F of the submachine gun in the pivot 20 arranged below the wear plate surface 13. Its main inter-operation lever 16 is pivotally mounted on its opposite end to another lever 24 at the pivot 20, which is a pair of release operations (described in more detail below). The arm 25 which cooperates with a let-off sear is provided. The trigger 28 is pivotally mounted to the submachine gun at the pivot 30 and is operatively connected to the lower inter-operation 32 of the pair of release operations by the connecting link 34. The link 34 is rotatably connected at one end thereof to the trigger 28 at the pivot 36 and the other end is pivotally mounted at the lower actuating rod 32 at the pivot 38. The upper operating rod 40, which cooperates with the lower operating rod 32 to control the movement of the arm 25, is mounted to the frame with the lower operating rod 32 at the pivot 42. The upper actuating rod entails a cam follower 44, which cooperates with an actuating cam of the timing device 46 disposed at the bow of the submachine gun.

2 to 7, the arrows indicate in each case the direction in which the trigger mechanism or element of the firing speed control device is moved by the spring force or, in the case of the firing speed control device, by electrical thrust or other actuating means. .

With reference to FIG. 2, the trigger mechanism is shown in the ready state of firing pulled back. In this state, the bolt 14 is held in a retracted state by the lever 16 between main operations. However, the lever 16 between itself is not able to hold the bolt 14 by itself in the retracted position, because the lever face 17 and the bolt face 15 of the bolt 14 cooperate with each other. A spring force that provides a 45 degree cam surface and the spring force shown by the arrows on the bolt 14 returns the lever between the main operations shown by the arrow on the lever 16 between the main operations. Because the bolt face 15 abuts the lever face 17 of the lever 16 between the main operations by pushing the bolt 14 forward because it is greater than the spring force for returning the lever between the main operations shown by the arrow on the top. to be. However, since the lever 16 of the main inter-operation is directly linked to the lever 24, if the arm 25 of the lever 24 is the inter-operation surface 33 or the inter-operation 40 of the inter-operation 32. When locked in contact with the surface 41 between the operations, the lever 16 cannot be moved, thus keeping the trigger in the retracted position. In FIG. 2, the arm 25 is shown in the state of being held on the surface 41 between the operation by the lower operation 40.

As described above, the trigger 28 is linked directly to the lower inter-operation 40 by the link arm 34. As can be seen in FIG. 2, when the trigger is pulled backwards (retracted to the right in FIG. 2), the lower inter-operation 40 is rotated clockwise (down) and thus the inter-operation surface 41 ) Is detached from the arm 25 so that the lever 24 can rotate. Eventually, the bolt then freely moves forward (to the left of FIG. 2) above the main trigger inter-operation lever 16 to fire the submachine gun. The upper actuating rod 32 makes limited movement clockwise. The upper inter-movement 32 can only move until the inter-operation surface 33 meets the inter-operation surface 41a of the inter-operation 41. In practice, between the operation 32 and the operation 40 is between their operation by the spring force acting between them in the same way as a conventional spring clothes peg, as shown by the double arrow. Are deflected with respect to one another at faces 33 and 41. The pivot pin 38 protrudes axially and acts on one of the three step faces S, F, A of the firing mode selector switch 39 shown in FIGS. The selector switch 39 overlaps the lever 24 and the actuating 34. When the firing mode selector switch is in the bottommost position, the stepped surface S is aligned with the movement path of the pivot pin 38 (FIG. 2) which prevents the rotation between the lower operations 40. However, during firing, the firing mode selector switch 39 is in its intermediate position, and the step F is aligned with the movement path of the pivot pin 38, so that the lower operation 40 is rotated in a limited range. Can be done. Therefore, the lower operation interval 40 tends to rotate by the rotation of the trigger via the link 34. The interoperation surface 33a moves away from the interoperation surface 41a by a distance sufficient to allow the arm 25 to pass between the interoperation surfaces 33a and 41a.

It can be seen from FIG. 2 that the arm 25 is positioned below the inter-operation surface 33a of the upper inter-operation 32 when the arm 25 is engaged with the lower interoperation surface 41a. .

The firing mode selection switch 39 shown in FIG. 3 is set to a semi-automatic firing mode, so that in this firing mode, the firing mode selection switch 39 has the pivot pin 38 connected to the end of the firing mode selection switch 39. While the inter-operation 40 is allowed to move until it hits the vehicle surface F, the inter-operation 40 is sufficiently moved to the extent that the inter-operation 40 can engage the timing actuation switch 54. Do not allow it. The stepped surface F causes the operation 40 to stop just before the operation 40 is engaged with the switch 54 and immediately after the operation 40 is separated from the arm 25.

3 shows a state in which the trigger 41 is pulled and the inter-operation surface 41 of the release operation 40 is separated from the arm 25 of the lever 24. 3 shows the moment when this separation occurs. It can also be seen that the upper operating rod 32 is held in place by the arm 25, so that the operating rod 32 does not move downward.

4 shows the relative positions of the trigger mechanism parts immediately after the position shown in FIG. The lever 24 is no longer held in the arm 25 by the released actuating 32 so that the bolt 14 can slide over the lever 16 between the main actuatings and thereby Due to this, the lever 16 is pushed downward to rotate the lever 24 counterclockwise so as to be released from engagement with the operation 32 or 40.

Of course, the main inter-operation lever 16 is moved below the surface 13 of the wear plate to separate the bolt 14.

Referring to FIG. 5, the trigger is still shown in the pulled (retracted) state, and the relative position of the trigger components is shown in a position immediately after the position shown in FIG.

The bolt 14 is returned by the reaction force that releases the bullet and releases the bullet along the tail section, and the lever 16 between the main operations is moved upwardly from the surfaces 15 and 17 between the operations by the spring biasing force. By engaging in snap, the forward movement of the bolt is suppressed. The lever 16 between the main operation snaps upwards and at the same time rotates the lever 24 clockwise, and the arm 25 of the lever 24 is lowered between the operation surface 33a of the upper operation 32. Allow to slide across the surface between operations. The inter-operation 32 is free to return to the neutral position with respect to the lower inter-operation 40 where the inter-operation surface 33a and the inter-operation surface 41a abut. In doing so, the upper stem 32 engages with the arm 25 on the interslip surface 33 and the slip 14 slides away from the cam-type engagement on the interslip surfaces 15 and 17. The return movement of the lever 24 is prevented. Thus, the bolt is fixed in the retracted position.

In order for the submachine gun to fire again in semi-automatic firing mode, the trigger must be released to reset the trigger mechanism. Therefore, referring again to FIG. 2, as the trigger 28 is released, the lower actuating rod 40 rotates counterclockwise (upward). This action causes the upper operation section 32 to be moved upward by the engagement between the operations at the operation surfaces 32a and 41a. As the upper actuating rod 32 is separated from the arm 25 at the actuating face 33, the actuating face 41 of the lower actuating rod 40 causes the arm 25 to be in contact with the actuating face 41. Is moved to the engaged position. The submachine gun is then fully ready to fire and the trigger can be pulled back.

If the upper stem 32 is not engaged with the arm 25 after the stem 40 has been separated, it can be seen that the bolt will move freely back and forth continuously after the first bullet is fired from the gun. In a fully automatic firing mode that is not fully adjusted, the submachine gun fires the bullet continuously until the supply of bullets is stopped or the trigger is released to reengage the lower arm 40 and arm 25 again. To fire the submachine gun in the adjusted fully automatic firing mode, the selector is moved to engage the trigger mechanism, causing the trigger mechanism to operate the timing device 46 to control the movement of the trigger.

Referring to FIG. 6, the selector switch 39 is shown in the top position, in which the step A is aligned with the movement path of the pivot pin 38. When the selector switch 39 is in this position, the lower actuation rod 40 is sufficiently long to engage the timing operation switch 54 and press this timing operation switch 54 when it is actuated via the trigger 28. It can be rotated clockwise to actuate the timing device 46. The timing device includes a motor (not shown), which causes the cam wheel 56 to rotate clockwise during operation (see FIG. 8).

Unlike interposing the selector switch 39, the various parts of the trigger mechanism are held in the relative position shown in FIG. 5 for semi-automatic firing. However, after the trigger is retracted and held in the fully pulled position and the first bullet is fired, the lower stem 40 is rotated away from the engaged position with the arm 25 so that the upper stem 32 is turned to the arm ( As it engages again with 25), the lower inter-operation interval 40 will only act to keep the switch 54 pressed.

8, cam wheel 56 is shown in plan view. The cam lug 58 carried by the cam wheel engages with the cam face 44 of the upper actuating rod 32 once every rotation of the cam wheel so that the upper actuating shaft rotates counterclockwise (upward) so that the arm 25 is rotated. It is to be separated from the engagement with the face 33 between operations. The submachine gun is fired whenever the cam lug 58 causes the upper stem 32 to be disengaged from the engagement position with the arm 25, and the upper stem 32 is then engaged with the arm 25 again. This operation continues only in a cycle in which the cycle of the cam becomes smaller than the firing cycle inherent to the submachine gun. As a safety feature, when the submachine gun is ready for firing, the cam lug cannot engage the cam face between the top actuations until the trigger is fully retracted. Therefore, the movement of the parts of the trigger mechanism can be arranged such that the gun can be fired in the semi-automatic mode with the trigger fully pulled down, even when the automatic firing select switch is in the engaged state.

The upper actuating rod 32 should have time to reengage with the arm 25. The rate of fire may be infinitely reduced by other differential gear trains or voltage variations, but the rate of fire cannot be increased beyond the gun's own unregulated rate of fire.

FIG. 6 shows the trigger mechanism ready to fire, FIG. 7 shows the cam wheel 56 positioned to separate the upper actuating rod 32 from the engagement position with the arm 25 of the lever 24. have. A timed automatic firing cycle continues until the bullet supply is interrupted or the trigger is released. When the trigger is released, the trigger causes the lower actuating rod 40 to engage the arm 25 of the lever 24 and also causes the lower actuating rod 40 to disengage from the switch 54 so that the timing motor and cam wheel ( 56) Stop. Submachine guns are then loaded in the absence of bullets, or fired again.

The trigger mechanism is constructed and arranged to reduce the release force on the arm 25. If the trigger surface 15 and the lever surface 17 between the main operation are perpendicular to the direction of movement of the knob, as in a known firearm, for example, a release force of about 6 pounds with a main spring force of 18 pounds Will be generated. However, since the face of the bolt 14 and the lever 16 should be positioned at an angle of 45 ° with respect to the vertical, for example, the main spring force of 18 pounds is only 9 pounds of downward force on the lever 16 between main operations. Activating, thus the force is transmitted from the connecting pivot 22 to the lever 24. Since the arm 25 of the lever 24 is isolated at twice the distance from the pivot 22 as compared to the pivot 26, the force transmitted to the arm 25 of the lever 24 is controlled by the lever 24. It becomes 1/2 of the force exerted on the pivot 22. Therefore, a force of 9 pounds is reduced to 4½ pounds on the arm 25 opposite the inter-operation face 33 or the inter-operation face 41. The coefficient of friction for 4½ pounds of the face 25 between the arm 25 and the operation can be as low as 0.5 (depending on the degree of finishing of the corresponding surface). The upper actuation interval 32 is the active release actuation when the gun is set to the adjusted fully automatic firing mode, and therefore the actual release force that the timing device must overcome despite the return spring force of the actuation 32. May be less than one pound.

In the semi-automatic firing mode and the fully automatic firing mode, the lower actuating rod 40 maintains the bolt in the ready position for firing back. Since the lower actuation rod 40 is manually controlled via the trigger 28, the lower actuation rod may have a much stronger return spring.

If you require an extremely lightly triggered trigger for semi-automatic firing and, therefore, a high degree of accuracy, temporarily disconnect the strong trigger return spring (for firing one bullet), and then again after the trigger is released. Interlocking systems can be used.

The force holding the release operations 32 and 40 can be further reduced by replacing the return spring acting on the lever 16 and the lever 24 between the main thrust actuations with one exerting a greater force. A spring force that pushes upwards on the main interlock lever 16, such that an 18 pound main spring force transmits a 9 pound download force against the pivot pin 22, will not act on the inter main lever lever 16. It only happens when If the force of the return spring acting upward on the lever 16 between the main actuations is, for example, 4 pounds, the actual force transmitted downwards on the main actuating lever 16 and the pivot pin 22 is 5 lbs. Only 2½ pounds of force is transferred to the arm (25). The return spring force of the lever between about 9 pounds of main operation neutralizes the 9 pounds of downloading force transmitted by the main spring of the bolt, which will not move when the trigger is pulled.

The lever 24 has a portion above the pivot pin 26, which portion has a mass equal to the mass of the lever below the pivot pin 26. The lever 24 is an elongate part positioned perpendicular to the moving line during recoil. The upper portion of the pivot pin 26 eliminates any vibrations in the lever 24 that may adversely affect the locking action of the arm 25 together with the release operation 32 or 40.

This embodiment uses a cam wheel to move the upper end 32. However, other mobile devices may also be used that transmit the required force and can reliably and repeatedly move the upper operation 32 between the required periods. The motion of such a device may be, in contrast to a rotary motion, for example a reciprocating motion generated by a solenoid.

The power source for operating the mobile device as described above may be a mechanical spring device or gas pressure in addition to the electrical device. However, embodiments of the present invention have the advantage that the timing device is an independent unit sealed to other elements. The timing device is expected to have up to the life of the gun (eg 50,000 shots) and beyond this life, depending on the battery size. The timing device may incorporate a warning light indicating battery condition.

The trigger mechanism of the present invention is ideally suited for incorporation into an open-cluttered 9mm submachine gun, but can also be used for closed glyphs by simply changing the form of the glyphs. This feature makes it possible to use the firearm as a closed key, mainly in semi-automatic firing mode when accuracy is very important, but it can also be used when the fully automatic firing mode is selectable, for example in an emergency.

If the timing device fails, the firearm can be fired normally as a semi-automatic firearm. Optionally, a gun may also be provided with a selection device (not referred to) that engages the upper actuating rod 32 and keeps the upper actuating 32 outwardly above the movement path of the arm 25. Such a device allows the gun to be used in a fully automatic firing mode without adjustment.

Means such as electrical sparks, rather than mechanical gulls, can also be used to fire bullets, in which case timing devices are used to control the release of the spark sparks.

The present invention relates to a fire speed control mechanism of a firearm for controlling the fire speed of a firearm that can be fired automatically, such as a submachine gun.

It is well known that submachine guns exhibit a climb phenomenon in which bullets fly upwards and bullets fly upwards during automatic firing. As each bullet is fired, the firearm recoils upward, causing the muzzle to deflect a few degrees and return to its original proper position. In the fully automatic firing mode, if the firing speed is too fast, the bullets that are fired continuously are fired after the preceding bullet is fired before the muzzle returns to the target, so that the bullets fly above the target. Accordingly, each bullet fired in succession is directed upwards than the preceding bullet. As a result, the climbing phenomenon, in which bullets that are fired continuously toward the target at first, gradually moves upward from the target, becomes stronger. As the firing speed increases with respect to certain firearms, the climbing tendency is known to be adequately controlled by the trained user if the firing speed is between 400 and 600 shots per minute. At least some of this control depends on the design and weight of the submachine gun and the degree of training of the user. Important factors involved in the rate of fire are the weight of the bolt and the distance traveled.

Previous attempts to reduce the weight and size of submachine guns had to reduce the size and weight of the bolt and reduce the distance the bolt could travel. As a result, these attempts resulted in the gunlock giving the gun a rate of fire exceeding the desired maximum speed of 600 rounds per minute. Therefore, these efforts to reduce the size of the bolts have altered the extent of the gun's climb and reduced control performance.

Many attempts to control the firing speed of submachine guns include increasing the weight of the bolts or adjusting their movements. In the first case, the physical size of the gun was reduced, but the actual weight of the bolt was increased by using a high density material such as tungsten alloy or by charging lead in the bolt. This method has its own contradiction in that the total weight of the firearm is increased. Also, even with high-density materials, the rate of launch is minimal. Although the firing rate was lowered from 1,800 to 1,500 rounds per minute, it was far less than the controllable reduction of 400 to 600 rounds per minute. In order to control the movement of the bolt by a lock-up or inertial mechanism, the force generated by the ejected bullets must be used, and if the inertial mechanism fails, the automatic fire of the gun is disabled. In addition, it did not actually slow down the launch rate enough to eliminate the climbing phenomenon.

The firing rate control mechanism of the present invention can be incorporated into a submachine gun to provide a pistol-sized firearm having a controllable firing rate in the range of 400 to 600 shots per minute. In addition, the firing speed is not predetermined by intrinsic physical properties such as, for example, the weight of the bolt or the moving distance of the bolt. The rate of fire is controlled by means of incorporation of the firearm, independent of the force generated by the bullets being released, and determined by a test to fit each firearm into which the rate of fire control mechanism according to the invention is incorporated. Therefore, if a submachine gun of a particular model fired in fully automatic firing mode is returned to its original position within 1/10 of a second after each bullet fired in succession, the particular firearm will be capable of 10 shots per second or 600 shots per minute. Will be adjusted to fire. If the other gun has a long barrel or lightweight frame or other feature that changes the firing characteristics of the gun, the firing speed of the gun is adjusted to the speed determined to be most suitable to ensure maximum firing accuracy.

The present invention is directed to a trigger rider with a timing device that can overcome or at least mitigate the problems of the prior art. Accordingly, the present invention has a timing device operable to determine the rate of fire of a firearm, the timing device comprising bullet release means for releasing bullets from the firearm when the physically displaceable trigger of the trigger mechanism is moved to the fire position. Provided is a trigger mechanism capable of fully automatic firing that periodically stops.

According to one aspect of the invention, the bullet discharging means has a reciprocating bolt, which is braked periodically to reduce the inherent periodic movement speed during automatic firing. Preferably, the timing device is an electric timing device that operates a main sear lever to control the movement of the bolt.

According to a feature of the invention, the timing device can be activated by the trigger of the trigger mechanism of the firearm. When the timing device is triggered, the trigger mechanism has a trigger that is operatively connected to a pair of operations, each operation actuating a lever between the main operations to control the movement of the bolt. It is provided with the working face which cooperates with the arm which a liver lever operating means carries. When the firearm is set to semi-automatic firing mode, it is preferable that both arms of the pair of operations cooperate with the arm, where the arm is retracted when the trigger is retracted to release the bolt from the cocked disposition for firing. It is released from the plane between operations, and after firing, the gun is held in engagement with the plane between operations between the other operations. On the other hand, while holding the bolt back by holding the trigger retracted, the arm is then moved to engage the inter-operational surface between the operations between the ones when the trigger is released and the gun is in the pulled state for another shot. .

One operation may operate a timing device to maintain the timing device in an operational state during automatic firing of the gun, which may adjust movement between the other operations to slow down the original periodic movement speed of the bolt. . The timing device may incorporate a rotatable cam periodically engaged with the cam follower involved by the other operation.

The lever between the bolt and the main operation may have a cam surface that interlocks when the bolt is retracted, the lever between the main operations being rotatably mounted to release and detain the bolt, the lever between the main operations It is controlled by another lever that carries the arm.

Preferably, during fully automatic firing of the firearm, a firing mode selector switch is moved to cooperate with the one operation to operate the timing device, and during the semi-automatic firing of the firearm, the firing mode selector switch between the one operation. Break out of cooperative status.

Another aspect of the invention provides a firearm incorporating a trigger mechanism having a timing device as described above.

It is emphasized that the firearm incorporating the trigger mechanism according to the invention does not mean an electric firearm. The firing rate of the firearm may be controlled by electrical or electronic means in a preferred embodiment, although the firearm may be in semi-automatic or fully automatic mode even if such means malfunction, but in this case the original fire rate of the firearm. It is fully operable as.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

Claims (15)

For firearms capable of fully automatic firing, comprising an arm carried by a bullet ejection means, a main auto lever which controls the movement of the bullet ejection means, an actuating means of the main inter lever lever and a lever inter-migration lever actuating means; As a trigger mechanism, the trigger mechanism is a physically displaceable trigger, a detention means having a pair of inter-operation and cam elements each having an inter-operation surface cooperating with the arm, and the cam element complementary to the cam element. And a timing device having a cam shape, wherein the detention means is operable to suspend the bullet ejection means of the gun and the cam element of the detention means cooperates with a complementary cam element of the timing device. And the timing device complements the complement to enable fully automatic firing of the firearm when the physically displaceable trigger is moved to the firing position. And an electric motor for driving the die cam element, wherein the timing device is operable to cause the detaining means to periodically release the bullet discharging means. 2. The method of claim 1, wherein all of the pair of actuations cooperate with the arm when the gun is set to a semi-automatic firing mode, the arm actuating the trigger mechanism when the trigger is retracted. The trigger mechanism being released from the plane of operation between one of the operations during operation of the gun and interlocked with the plane of operation between the other operations after firing of the gun, but with the trigger held in the firing position to detain the bullet release means. During operation of the trigger mechanism, the trigger is then released again and moved to engage a surface between operations between the one operation when the gun is in the ready position for firing again. 3. The operation of claim 1, wherein the one operation operates the timing device to keep the timing device in operation while the firearm is automatically fired, and the timing device reduces the periodic movement speed of the bullet release means. A mechanism for adjusting movement of said other operation so as to make it work. 4. The trigger mechanism as set forth in claim 3, wherein the long-term timing device incorporates a rotatable cam periodically engaged with the cam follower involved by the other operation. 2. The bullet release means according to claim 1, wherein the bullet ejection means and the main actuating lever have a cam surface that interlocks with each other when the bullet ejection means is in the ready to launch position, wherein the lever between the actuating means releases the bullet ejection means and And rotatably mounted to detain, wherein the lever between the main operations is controlled by a lever accompanying the arm. 3. The apparatus of claim 2, further comprising a firing mode selection switch, said firing mode selection switch cooperating between said one operations during full automatic firing of said firearm to operate said timing device, and during said semi-automatic firing of said firearm. A trigger mechanism that is isolated from operation to stop operation of the timing device. A timing device for controlling the firing speed of a firearm with a trigger mechanism in a fully automatic firing mode, comprising: an electric motor with a drive shaft and a cam means with a power source and a cam wheel connected to the drive shaft and provided with a cam lug And the cam wheel has a substantially circular first surface and a second surface, the cam lug protrudes axially from the first surface and the drive shaft is connected to the second surface. As a battery unit, the battery unit is sealed in the firearm to supply electricity to the electric motor which rotates the cam means at a constant speed, the timing device is embedded in the firearm used, and the cam means is fully automatic. Cooperating with the trigger mechanism in firing mode to cause bullets to be fired periodically from the firearm; Ming device. A submachine gun having a trigger mechanism and a timing device for controlling the firing speed of a firearm in a fully automatic firing mode, the timing device comprising an electric motor having a drive shaft, a power source, and a cam connected to the drive shaft and provided with a cam lug. A cam means with a wheel, said cam wheel having a substantially circular first surface and a second surface, said cam lug protruding axially from said first surface and said drive shaft being said second surface The power supply supplies electricity to the electric motor that rotates the cam means at a constant speed, the timing device is embedded in a firearm used, and the cam means is triggered when the firearm is in a fully automatic firing mode. A submachine gun characterized by cooperating with a mechanism to cause bullets to be periodically fired from the firearm. 9. The submachine gun of claim 8, wherein the power source is a battery unit sealed in the portable submachine gun. 9. The submachine gun according to claim 8, wherein the submachine gun is equipped with an operation switch, and the trigger mechanism is attached to the trigger, and when the trigger is pressed, a link means for moving to the engaged position and the position out of engagement with the actuator switch when the trigger is pressed. And the actuating switch causes the cam means to rotate when the trigger is pressed to perform a fully automatic firing of the submachine gun. 2. The bullet discharging means according to claim 1, wherein the bullet discharging means comprises a bolt, and the main inter-operation lever has means for cooperating with the bolt to suppress movement of the bolt, wherein the detaining means is characterized in that the bullet discharging means is intermittent. Trigger mechanism characterized in that to be stopped. 4. The apparatus according to claim 3, further comprising: first and second deflection means which act on the lever between the main operations and deflect the lever between the main operations toward a position cooperating with the bolt; Wherein the lever between the main operations is insufficient to intermittently stop the movement of the bolt during the fully automatic firing of the gun. 8. The timing device of claim 7, further comprising an actuating switch operable to rotate the cam means when the trigger mechanism is engaged to perform a fully automatic firing of the firearm. 14. The timing device of claim 13, wherein said actuation switch is a depressible lever. 15. The apparatus of claim 14, wherein the actuating switch is mounted to the firearm, and the trigger mechanism is mounted to the trigger and moves to engage with and disengage from the engagement when the trigger is depressed. And a link.