JPH0478919B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a bolt-action firearm, and in particular, a bolt-action rifle that uses one or more of a sear, a trigger, and a cocking piece. This invention relates to a deactivation selection mechanism for selectively blocking three movements.

[Conventional technology]

The main components of a conventional bolt-action firearm are a gun barrel, a receiver fixed to the rear of the barrel, a cylindrical breech bolt installed in the receiver in line with the barrel, and a breech bolt. a firing mechanism including a trigger mounted below on the receiver; and a stock. The cylindrical breech bolt is capable of rotating about its longitudinal centerline from a locked firing position to an unlocked ejection/loading position and in an unlocked ejection/loading device. can be slid in the longitudinal direction.

As the breech bolt rotates from the locked firing position to the unlocked ejector/loader and moves toward the rear of the firearm, the spent cartridge is pulled from the barrel chamber and ejected. . When the breech bolt is moved from its rearmost position toward the front of the firearm, a new (i.e., unused) cartridge is loaded into the chamber of the barrel. When the breech bolt reaches its most forwardly movable position, it is rotated about its longitudinal centerline and locked, leaving the firing mechanism ready to fire.

The breech bolt is equipped with a cocking piece that is biased by a spring and held in the ready-to-fire position by a sear. The rotational movement of the trigger moves the sear and releases the cocking piece for firing.

[Problem that the invention seeks to solve]

A device for selectively blocking the movement of any one or three of the locking piece, the sear, and the trigger, i.e., selectively blocking the movement of the locking piece in the direction toward the cartridge case. Deactivation selection mechanisms have been proposed in the past, but none have yet been able to provide the features and advantages provided by the deactivation selection mechanism of the present invention for bolt action firearms.

[Means for solving problems]

The deactivation selection mechanism of the present invention for bolt action firearms selectively prevents movement of the trigger and/or bolt handle. The deactivation selection mechanism includes a rotatable selector supporting a body portion and a finger engagement protrusion in fixed relationship, a trigger/sear prevention means associated with the body portion of the selector, and a finger engagement protrusion of the selector. a locking plunger moved by a mating projection to lock the bolt handle, wherein positioning of the selector in the first position causes the trigger blocking means to permit rotation of the trigger. The positioning of the selector in the second position also causes the locking plunger to enter the bolt handle fixing hole in the bolt handle to prevent movement of the bolt handle and causes the trigger blocking means to block rotation of the trigger. The selector can also be rotated to a third position, where rotation of the trigger is prevented and movement of the bolt handle is allowed.

[Effect]

A feature of the above-described deactivation selection mechanism is that the finger-engaging projection of the selector moves into the receiving recess of the cocking piece when the selector is placed in the second position.

[Examples and effects]

In FIGS. 1 and 2, a bolt action rifle 10 includes a barrel 11, a receiver 12 fixed to the rear of the barrel 11, and a cylindrical receiver 12 provided in the receiver 12 so as to be in line with the barrel 11. A breech bolt 13, a bolt handle 14 fixed to the rear end of the breech bolt 13, a bolt head sleeve 16, and a tightening piece 17.
, a receiver tongue piece 18 and a stock 21. Bolt action rifle 10 also includes a trigger 22, a trigger guard 23, and a rotatable selector 26. A selector 26 is provided in the receiver 12 and rotates about a vertical line in the figure.

As shown in FIG.
The upper arm 29 of the trigger 22 is engaged with the sear notch 31 of the sear 32. The sear 32 is rotatable around a pivot shaft 33, and a spring 36 is interposed between the trigger 22 and the sear 32. When trigger 22 is pulled, trigger 2
2 rotates clockwise around the trigger axis 28 to disengage the upper arm 29 from the sear notch 31, and as a result, the sear 32 rotates clockwise around the axis 33 to release the locking piece 17. The locking piece 17 is made movable. The locking piece 17 is moved forward by the biasing force of a spring (not shown) and hits the detonator of the cartridge (not shown) to fire a bullet from the rifle.

4 to 8, the rotatable selector 26 is located in the first to third recesses 38, 39, 4.
One of the three positions is held by placing a detent 37 (see FIG. 7) in one of the positions 0 (see FIGS. 4 to 7). The selector 26 has a cylindrical selector main body 43 supporting a detent 37 at its lower part as shown in FIG.
The first and second elongated groove regions 44, 45 in the central portion of the selector body 43 define a first selection cam surface 46 and a second selection cam surface 47 forming cam means. stipulated. The selector 26 also has a thumb piece 41 that constitutes a finger engagement protrusion. The width of the first elongated groove region 44 is greater than the width of the first cam follower 54 to receive the first cam follower 54 as shown in FIG. The width of the second long groove region 45 is smaller than the width of the first long groove region 44. As a result, as shown in FIG. 6, the first cam guiding member 54 cannot enter into the second long groove region 45 and is only placed on the circumferential surface 50 of the cylindrical selector body 43. It is. As shown in FIG. 7, the first cam follower member 5
4 is housed between the frame members 55 and has a width greater than the width of the second elongated groove region 45 .

On the other hand, a second cam follower 56 , which has a width smaller than the width of the first cam follower 54 , moves into the second elongated groove region 45 during the rotational movement of the selector 26 .
Get inside.

Trigger control lever 51 is rotatable about pivot 53 . One end of the trigger control lever 51 supports a first cam follower member 54 on the upper side and a second cam follower member 56 on the lower side, and a trigger engaging means is provided at the other end. A constituting trigger blocking finger 57 is arranged. Trigger control lever 51 is biased by a spring 59 in a direction away from upper arm 29 of trigger 22 .

Looking at Figure 8, Kotsu King Peace 17 is
It has a receiving recess 60 for receiving the thumb tab 41 when the selector 26 is rotated to the position shown in FIGS. 6 and 8. In this position,
The fixed plunger 52 is forced into the bolt handle fixing hole 61 by the selector 26 and prevents the bolt handle 14 from moving. When the selector 26 is moved from the position shown in FIGS. 6 and 8, the spring 64 forces the fixed plunger 52 into the bolt handle fixing hole 61 of the bolt handle 14.
to separate from

In summary, when the selector 26 is placed in the position shown in FIG.
prevent. The position of the selector at this time is defined as the second position. At this time, the selector 26 also restricts the movement of the locking piece 17 with the thumb piece 41 and causes the fixed plunger 52 to prevent the movement of the bolt handle 14, as shown in FIG.

When selector 26 is rotated to the first position via thumb 41, detent 37 engages first recess 38 as shown in FIG. Here, the first cam follower 54 of the trigger control lever 51 enters the first elongated groove region 44 and abuts the first selection cam surface 46, so that the trigger control lever 51 is moved by the biasing force of the spring 59. Trigger blocking finger 5
7, the upper arm 29 of the trigger 22, as shown in FIG.
The trigger 22 is placed in a position where it does not engage with the trigger 22, that is, does not prevent rotation of the trigger 22. This firearm, bolt action rifle 10, can fire when selector 26 is placed in the first position. In order to prevent the rotation of the trigger 22 and thus the movement of the sear 32, the selector 26
As shown in FIG.
It is rotated to a position where it moves into 9. The position of the selector 26 at this time is hereinafter referred to as a third position for convenience, in which the first selection cam surface 46 causes the first cam follower member 54 of the trigger control lever 51 to move into the first elongated groove region. 44 and the second cam follower member 56 enters the second elongated groove region 45 and abuts the second selected cam surface 47, thereby reducing the biasing force of the spring 59, as shown in FIG. Trigger blocking finger 57 is engaged with upper arm 29 of trigger 22 against this. In this position, the upper arm 29 of the trigger 22 is prevented from rotating clockwise about the trigger pivot 28 from the position shown in FIG. Therefore, the sear 32 cannot move downward to fire the bolt action rifle 10. Unlike the above description,
The trigger blocking finger 57 of the trigger control lever 51 can also be designed to block rotational movement of the sear 32.

Finally, the selector 26 can be rotated to a position in which the detent 37 moves into the third recess 40. This position is hereinafter referred to as the second position for convenience.
Trigger control lever 51 during rotation to the second position
The first cam follower member 54 slides on the circumferential surface 50 of the main body portion 43 of the cylindrical selector 26, and the second cam follower member 56 slides on the circumferential surface 50 of the body portion 43 of the cylindrical selector 26, and the second cam follower member 56 slides on the circumferential surface 50 of the body portion 43 of the cylindrical selector 26.
The trigger blocking finger 57 of the trigger control lever 51 remains engaged against the upper arm 29 of the trigger 22 as it slides over the selection cam surface 47 of the trigger control lever 51 . Selector 2
6 into this second position, the thumb piece 4
1 moves the fixed plunger 52 to the right in FIG.
to prevent rotational movement of the bolt handle 14. During this movement of fixed plunger 52 spring 64 is compressed. The selector 26
By reaching the position , the thumb tab 41 is placed in the receiving recess 60 of the locking piece (or pin striker) 17 to prevent forward movement of the locking piece 17 as shown in FIG.

Looking at the other embodiments shown in FIGS. 9 through 18, and especially first looking at FIGS. 16 and 18, it will be seen that a selector 26a similar to the previously described selector 26 is rotatable. The selector 26a is held in one of three rotational positions by a detent 70 provided in a detent hole 71 in the receiver 12. The detent spring 72 biases the detent 70 into the first to third recesses 73, 7 in the selector 26a.
4 or 75. 2
6a has a cylindrical selector main body portion 78 including a thumb piece 77 constituting a finger engagement protrusion and a shaped foot portion 79. The foot portion 79 has a notch 8 shaped to engage or disengage the trigger 82 as will be explained later.
1. Trigger 82 is rotatable about a pivot 83 and has a shoulder 87 that includes a finger 84, a sear-engaging upper arm 86, and a projection 88.
16 and 18 further show a pair of side pieces 89, 91 of the trigger 82, a sear 92, a sear spring 93, a sear pin 94, and a select trigger cover plate 95.
and a sight 96 are shown.

12 and 14 show a position where the notch 81 of the foot 79 of the selector 26a accommodates the protrusion 88 of the trigger 82 when the selector 26a is placed in the A position shown in FIGS. 12 and 14. This position allows rotation of the trigger 82 in a clockwise direction, resulting in the release of the sear 92 and the firing of the rifle. This A position corresponds to the first position of the selector 26 described above. When the thumb piece 77 of the selector 26a is moved from the A position to the rear B position in FIG.
The foot 79 moves to a position that does not correspond to the protrusion 88 of the trigger 82, and the lower end surface of the foot 79 comes to face the upper surface of the protrusion 88 of the trigger 82 with a slight gap as shown in FIG. 82 is prevented from substantially rotating. That is, at this time, the trigger 82 cannot rotate clockwise, so the sear 9
2 is also unable to move to fire the bolt action rifle 10. Thus, the above-mentioned B position corresponds to the above-mentioned third position of the selector 26.

FIG. 17 shows that the thumb piece 77 of the selector 26a has moved further rearward from the B position in FIG.
It is shown in the position shown in FIG. C and placed in the receiving recess 60 of the king piece 17. The C position in FIG. 14, where the movement of the bolt handle 14 is blocked, corresponds to the second position of the selector 26 described above, and the selector 26 is also in the C position.
The lower end surface of the leg portion 79 of a is the protruding portion 88 of the trigger 82.
Since the upper surfaces face each other with a slight gap, the rotation of the trigger 82 is prevented, and as a result, the sear 9
2 is also unable to move to fire the bolt action rifle 10.

[Brief explanation of drawings]

FIG. 1 shows a main part of a bolt action rifle equipped with a deactivation selection mechanism according to an embodiment of the present invention when the selector is placed in a first position that allows rotation of the trigger and movement of the bolt handle. Side view; Figure 2 is a plan view of Figure 1;
The figure is a sectional view taken along the line 3-3 in Fig. 2; Fig. 4 is a sectional view taken along the line 4-4 in Fig. 3, showing the thumb piece of the selector with an imaginary line; A sectional view showing the same cross-section as in Fig. 4 with the selector placed in the third position where the trigger control lever is actuated to prevent only rotation of the trigger; Fig. 6 shows the rotation of the trigger and the locking piece. The state in which the selector is placed in the second position to prevent the movement of the
7 is a sectional view taken along line 7--7 of FIG. 5; FIG. 8 is a sectional view taken along line 7-7 of FIG. FIG. 9 is a plan view partially cut away to show the locking plunger moved to a position blocking movement of the bolt handle; FIG. 9 shows a bolt action with a deactivation selection mechanism according to another embodiment of the invention; A side view with the selector in the first position allowing rotation of the trigger and movement of the bolt handle in the main part of the rifle; FIG. 10 is a plan view of FIG. 9; FIG. 11 is a plan view of FIG. 10 is a cross-sectional view taken along line 11-11; FIG. 12 is a side view showing only the selector and trigger in FIG. 9; FIG. 13 is a side view in which the selector in FIG. 12 only prevents rotation of the trigger. A side view showing the state when placed in the third position, similar to FIG. 12; FIG. 14 is a plan view of FIG. 12;
The figure is a sectional view taken along line 15-15 in FIG. 14;
FIG. 16 shows the alternative embodiment of the deactivation selection mechanism, receiver, trigger, and other components associated with the deactivation selection mechanism shown in FIGS. 9-15, 17, and 18. An exploded perspective view showing the first
Figure 7 is a plan view showing the position of the selector thumb in the receiving recess of the locking piece when the selector is placed in the second position to prevent rotation of the trigger and movement of the bolt handle; ;18th
The figure is a perspective view showing only a selector of a deactivation selection mechanism according to another embodiment of the invention. 10... Bolt action rifle, 11... Barrel, 12... Receiver, 13... Breech bolt, 1
4... Bolt handle, 16... Bolt head sleeve, 17... King piece, 18... Receiver tongue piece, 22... Trigger, 23... Trigger guard, 26,
26a...Selector, 28...Pivot, 29...Upper arm, 3
1... Sear notch, 32... Sear, 33... Axis, 3
6... Spring, 37... Detent, 38... First recess,
39...Second recess, 40...Third recess, 41...Thumb piece (finger engagement protrusion), 43...Selector main body part,
44... First long groove area, 45... Second long groove area, 46... First selection cam surface, 47... Second selection cam surface, 50... Circumferential surface, 51... Trigger control lever, 52... Fixed plunger, 53... Pivot, 54
...first cam driven member, 55...frame member, 5
6... Second cam following member, 57... Trigger blocking finger (trigger engaging means), 59... Spring, 60... Receiving recess, 61... Bolt handle fixing hole, 64... Spring,
70...Detent, 71...Detent hole, 72...Detent spring, 73...First recess, 74...Second recess, 75...Third recess, 77...Thumb piece (finger engagement) protrusion), 78...selector main body, 79...foot, 8
1... Notch, 82... Trigger, 83... Pivot, 84
...Finger piece, 86...Sear engagement upper arm, 87...Shoulder, 88...
Projection portion, 89, 91... side piece, 92... sear, 93...
Sear spring, 94... Sear pin, 95... Selector covering portion, 96... Sighting device.

Claims (1)

[Claims] 1. Used for a bolt action firearm comprising a gun barrel, a receiver, a bolt sleeve, a locking piece, a bolt handle, a trigger, and a sear, Trigger blocking means for blocking rotation of the trigger in a direction that allows movement of the sear; having a main body and a finger engaging protrusion, and provided in the receiver K to rotate around a vertical line; a selector that rotates between a plurality of positions between positions; positioning the selector in a first position causes the trigger blocking means to allow said rotation of the trigger; and positioning the selector in a second position causes the trigger blocking means to rotate the trigger; an actuating means for preventing the rotation; a receiving recess formed in the locking piece into which the finger engaging protrusion of the selector enters when the selector is placed in the second position; a bolt handle fixing hole formed in the bolt handle; and; a fixed plunger that enters the bolt handle fixing hole and prevents movement of the bolt handle when the selector is placed in the second position; and a trigger that is triggered when the selector is placed in the first position.
Deactivation selection for a bolt action firearm, characterized in that movement of the sear and bolt handle is permitted and movement of the trigger, sear and bolt handle is prevented by positioning the selector in the second position. mechanism. 2. The trigger blocking means includes: a cam means formed on the main body of the selector; a cam follower member that engages with the cam means on the main body of the selector at one end, and a trigger engaging means at the other end; rotation of the selector to the second position causes the trigger engagement means to engage with the trigger to prevent rotation of the trigger, and rotation of the selector to the first position causes the trigger engagement means to engage the trigger with the trigger. A bolt-action firearm according to claim 1, further comprising: a rotatably provided elongated trigger control lever that releases the engagement of the lever and allows rotation of the trigger; Deactivation selection mechanism for. 3. The trigger blocking means comprises: a protrusion provided on the trigger to rotate together with the trigger; a foot provided on the selector; and placement of the selector in the second position causes the protrusion of the trigger and the selector to The foot of the selector engages to prevent rotation of the trigger, and positioning the selector in the first position causes the trigger to disengage the protrusion and the foot of the selector, allowing rotation of the trigger. A deactivation selection mechanism for a bolt action firearm as claimed in claim 1. 4. A bolt-action firearm according to claim 1, characterized in that the selector is also rotatable to a third position that prevents rotation of the trigger and allows movement of the bolt handle. Deactivation selection mechanism. 5. A bolt-action firearm according to claim 2, wherein the selector is also rotatable to a third position that prevents rotation of the trigger and allows movement of the bolt handle. Deactivation selection mechanism. 6. A bolt-action firearm according to claim 3, wherein the selector is also rotatable to a third position that prevents rotation of the trigger and allows movement of the bolt handle. Deactivation selection mechanism.