CROSSBOW TRIGGER DEVICE

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority of Chinese Patent Application No. 202411413496.5, filed on October 10, 2024, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention generally relates to a trigger device, and in particular to a crossbow trigger device with holding and triggering functions.

BACKGROUND

The crossbow consists of a stock, a riser, a trigger and strings, and etc. The riser and the strings can be always kept in a stretched state. The crossbow has a longer range than the bow. The crossbow hooks the stretched string through a trigger device, and release process of the crossbow is completed through operation of the trigger device.

Generally, the safety protrudes out to both sides of the trigger. It facilitates to switch on/off, but also accidental switching on is very likely to happen. Meanwhile the trigger does not absolutely prevent dry fire. So the crossbow life might be shortened by dry fire and possibility of human injuries still highly exists.

SUMMARY

In order to solve above technical problems, the invention provides a crossbow trigger device, which can prevent the trigger from accidentally switching on, and the trigger cannot fire without an arrow in the right place. So crossbow life will be prolonged. The trigger device is much safer and more reliable.

In order to solve above technical problems, the invention presents following technical solution.

A crossbow trigger device consists of a housing, a trigger lever, a linkage, a sear, a safety lock lever, a safety actuating lever, a safety, a catch, a nock sensor, a sensor lock lever and etc.

The trigger lever, the sear, the safety lock lever, the safety actuating lever, the catch, the nock sensor and the sensor lock lever are respectively hinged with the housing. The safety is assembled at the rear end of the safety actuating lever.

One end of the linkage is hinged with the trigger lever, the other is hinged with the sear. One end of the sear is clamped with a sensor lock lever, the other is clamped with a safety actuating lever. The safety lock lever is clamped with safety actuating lever. The front end of the safety actuating lever penetrates through the catch. The nock sensor is clamped with the sensor lock lever.

One end of the sear has a clamping hook, the other has a sliding chute. The sensor lock lever has a clamping groove. The safety lock lever has the first convex shaft. The clamping hook is connected with the clamping groove in a clamping manner, and the sliding chute is connected with the first convex shaft in a sliding manner.

The first torsion spring is assembled on the sear. The first clamping column is assembled on the housing. One side of the first torsion spring props against the first clamping column, the other is assembled on one side of the clamping hook of the sear.

The safety lock lever has a limit hole. The safety actuating lever has the second convex shaft. The second convex shaft is movably inserted into the limit hole.

The second torsion spring is assembled on the safety lock lever. The second clamping column is assembled on the housing. One side of the second torsion spring props against the second clamping column, the other props against the first convex shaft.

The safety actuating lever has a stroke limit groove. The stroke limit groove is assembled with a clamping spring. The housing has the third convex shaft. The third convex shaft is movably inserted into the stroke limit groove and penetrates through the clamping spring. The catch has a through slot. The front end of the safety actuating lever penetrates through it. The housing has the fourth convex shaft. One side of the stroke limit groove is clamped between the third convex shaft and the fourth convex shaft.

The catch is assembled with the third torsion spring. One side of the third torsion spring props against the housing, the other is connected with the catch. The third torsion spring enables the catch to be in an open state.

The nock sensor has an open groove. One end of the sensor lock lever is clamped into the open groove. The housing has the fifth convex shaft. The nock sensor has an inverted hook. The fifth convex shaft limits the inverted hook. The nock sensor has the fourth torsion spring. One side of the fourth torsion spring props against the fifth convex shaft, the other is assembled on the nock sensor.

The linkage has a protrusion. And the fifth convex shaft limits the protrusion.

The trigger lever has the fifth torsion spring which enables the trigger lever to generate a reset force after rotating.

Compared with the prior arts, the invention has following technical benefits.

By assembling the sensor lock lever and the nock sensor, the sear is utilized for limiting the trigger lever, the trigger cannot be triggered under the condition that the safety is independently switched on, or only an arrow is inserted. The safety absolutely cannot be switched on by accidental touching. The trigger is of a single integral unit, and is convenient to dismantle and exchange. Under the condition that the trigger wrongly switching on is avoided and no arrow or the arrow is not in right place, the trigger will not fire accidentally. The crossbow life is prolonged. The trigger device is much safer and more reliable.

BRIEF DESCRIPTION OF THE DRAWINGS

Other features in the invention will become clear from appended drawings, which illustrated one preferred embodiment of the trigger device of the invention, wherein

FIG. 1 is a perspective view of the preferred embodiment of crossbow trigger device of the invention.

FIG. 2 is a perspective view of the preferred embodiment of crossbow trigger device without left-side of the housing.

FIG. 3 is a perspective view of the preferred embodiment of crossbow trigger device without right-side of the housing.

FIG. 4 is a front view of the preferred embodiment of crossbow trigger device without right-side of the housing.

FIG. 5 is a perspective view of the preferred embodiment of crossbow trigger device with a stretched string.

FIG. 6 is a perspective view of the preferred embodiment of crossbow trigger device after triggered.

The appended drawing reference signs:

A housing--1, an end housing--2, a trigger lever--3, a protrusion--4, a safety--5, a catch--6, a safety actuating lever--7, a sear--8, a clamping hook--81, a sliding chute--82, a safety lock lever--9, a nock sensor--10, a sensor lock lever--11, a clamping groove--1101, a linkage--12, a clamp spring--13, a string--14, an arrow--15, the first convex shaft--1601, the second convex shaft--1602, the third convex shaft--1603, the fourth convex shaft--1604, the fifth convex shaft--1605, the first clamping column--1701, the second clamping column--1702, a limit hole--18, a stroke limit groove--19, a through slot--20, an open groove--21, an inverted hook--22, the first torsion spring--801, the second torsion spring--901, the third torsion spring--601, the fourth torsion spring--101, the fifth torsion spring-- 301.

DESCRIPTION OF EMBODIMENTS

The preferred embodiment of the present invention will be described in detail. The embodiment is illustrated in appended drawings, wherein the same or similar reference signs refer to the same or similar components or components having the same or similar functions. The embodiments described below with the appended drawings are only exemplary and serve to explain the invention, and are not to be construed as limitation of the invention.

In description of the present invention, it is to be understood that if any reference is made to the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like to indicate an orientation or positional relationship based on the orientation or positional relationship illustrated in appended drawings, is merely for the purpose of facilitating and simplifying the description of the present invention and does not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to imply the quantity of the claimed feature. Thus a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "plurality" means two or more, unless specifically limited otherwise.

In description of the present invention, it should be noted that, unless clearly stated or limited, otherwise the terms "mounted", "connected", and "joined" are to be construed broadly, and can be, for example, fixedly or detachably connected, or integrally connected, either mechanically or electrically connected, can be directly connected or indirectly connected through an intermediary, can be internal communication between two components, or can be an interaction between two components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

As shown in FIGS. 1-6, a crossbow trigger device consists of a housing 1, a trigger lever 3, a linkage 12, a sear 8, a safety lock lever 9, a safety actuating lever 7, a safety 5, a catch 6, a nock sensor 10 and a sensor lock lever 11, wherein the housing 1 is utilized for installing various components, and the housing 1 is installed in an end housing 2.

The trigger lever 3, the sear 8, the safety lock lever 9, the safety actuating lever 7, the catch 6, the nock sensor 10 and the sensor lock lever 11 are respectively hinged with the housing 1. The trigger lever 3, the sear 8, the safety lock lever 9, the catch 6 and the nock sensor 10 and the sensor lock lever 11 can respectively rotate. The safety 5 is installed at the rear end of the safety actuating lever 7. The safety actuating lever 7 can be driven to act by pressing down the safety 5. The catch 6 is utilized for hooking the string 14.

One end of the linkage12 is hinged with the trigger lever 3, the other is hinged with the sear 8. One end of the sear 8 is clamped with the safety lock lever 9, the other is clamped with a sensor lock lever 11. The safety lock lever 9 is clamped with the safety actuating lever 7. The front end of the safety actuating lever 7 penetrates through the middle of the catch 6. The catch 6 is clamped with the nock sensor 10. The nock sensor 10 is clamped with the sensor lock lever 11. The clamped manner is that two components can be snap-fitted into and contacted with each other, and dismantled from each other.

One end of the sear 8 has a clamping hook 81, the other has a sliding chute 82. The sensor lock lever 11 has a clamping groove 1101. The safety lock lever 9 has the first convex shaft 1601. The clamping hook 81 is clamped with the clamping groove 1101. The sliding chute 82 is connected with the first convex shaft 1601 in a sliding manner. The clamping hook 81 of the sear 8 is limited by the sliding slot 1101. Dry fire without the arrow 15 is prevented. The sear 8 has the first torsion spring 801. The housing 1 has the first clamping column 1701. One side of the first torsion spring 801 props against the first clamping column 1701, the other is mounted on the side of the clamping hook 81. After the sear 8 is rotated, the first torsion spring 801 is pressed to generate a reset force, which can drive the sear 8 to reset automatically. When the safety actuating lever 7 is not switched on, the first convex shaft 1601 on the safety lock lever 9 props against the sliding chute 82 by contacting between the first convex shaft 1601 and the sear 8. So the sear 8 is prevented from rotating and triggering, thereby the sear 8 enables to prop against the trigger lever 3, and the trigger lever 3 is prevented from rotating without an external force, thereby an accidental dry fire is prevented.

The safety lock lever 9 has a limit hole 18. The safety actuating lever 7 has the second convex shaft 1602. The second convex shaft 1602 is movably inserted into the limit hole 18. When the safety actuating lever 7 is driven, the second convex shaft 1602 can move within the limit hole 18. The limit hole 18 limits the rotation range of the safety actuating lever 7.

The safety lock lever 9 has the second torsion spring 901. The housing 1 has the second clamping column 1702. One side of the second torsion spring 901 props against the second clamping column 1702, the other props against the first convex shaft 1601. After the safety lock lever 9 rotating under an external force, the second torsion spring 901 is pressed to generate a reset force, which can drive the safety lock lever 9 to reset automatically.

The safety actuating lever 7 has a stroke limit groove 19. The stroke limit groove 19 has a clamp spring 13. The housing 1 has the third convex shaft 1603. The third convex shaft 1603 is movably inserted into the stroke limit groove 19 and penetrates through the clamp spring 13. Both sides of the clamp spring 13 respectively have a cavity only accommodating the third convex shaft. When the third convex shaft 1603 moves to both ends of the clamp spring 13, the safety actuating lever 7 is only in an open or closed state. Therefore, the third convex shaft 1603 clamped by the clamp spring 13, the automatic movement of the safety actuating lever 7 between the open position and the close position can be restricted. The catch 6 has a through slot 20. The front end of the safety actuating lever 7 penetrates through the through slot 20. The housing 1 has the fourth convex shaft 1604. One side of the stroke limit groove 19 is clamped between the third convex shaft 1603 and the fourth convex shaft 1604 to limit the movement of the safety actuating lever 7 in the horizontal direction, so that the safety actuating lever 7 is kept to move horizontally.

The third torsion spring 601 is mounted on the catch 6. One side of the third torsion spring 601 props against the housing 1, the other is connected with the catch 6. In the condition of no external force, the third torsion spring 601 is utilized to make the catch 6 in an open state, so as to facilitate the string 14 to be hooked.

The nock sensor 10 is utilized for checking whether the arrow 15 is inserted in the right place. The nock sensor 10 has an open groove 21. One end of the sensor lock lever 11 is clamped into the open groove 21. The open groove 21 is utilized to restrict the sensor lock lever 11. The housing 1 has the fifth convex shaft 1605. The nock sensor 10 has an inverted hook 22. The fifth convex shaft 1605 limits an inverted hook 22. The nock sensor 10 has the fourth torsion spring 101. One side of the fourth torsion spring 101 props against the fifth convex shaft 1605, the other is mounted on the nock sensor 10. After the nock sensor 10 rotating, the fourth torsion spring 101 is pressed to generate a reset force, which helps the nock sensor 10 reset automatically.

The linkage12 has a protrusion 4. When the linkage12 rotates a certain angle, the protrusion 4 will prop against the fifth convex shaft 1605, and the fifth convex shaft 1605 limits the linkage12, so as to limit the moving stroke of the linkage12 in a certain range.

The trigger lever 3 has the fifth torsion spring 301 which enables the trigger lever 3 to generate a reset force after rotating. After the trigger lever 3 is pulled, the fifth torsion spring 301 is pressed to generate a reset force, so that the trigger lever 3 can be reset automatically.

The invented trigger device is matched with the crossbow as a trigger device.

Shown as FIGS. 2 and 5, the string 14 is pulled up, but the arrow 15 is not yet inserted. In such state, no external force is applied to each component, and the specific conditions are as followed.

The trigger lever 3 is kept in the initial state, the string 14 is pulled into the catch 6 and is hooked by the catch 6. The protrusion 4 of the linkage12 does not contact the fifth convex shaft 1605. The clamping hook 81 of the sear 8 is connected with the clamping groove 1101 of the sensor lock lever 11. One end of the sensor lock lever 11 is inserted into the open groove 21 of the nock sensor 10. The clamping groove 1101 limits the sensor lock lever 11. The sear 8 is limited from rotating downward. It prevents dry fire when the safety 5 is open without the arrow 15. The sliding chute 82 of the sear 8 is blocked and restricted by the first convex shaft 1601, and the sear 8 is restricted from rotating. After the safety actuating lever 7 touches the string 14 in the process of pulling the string backward, the safety actuating lever 7 is always in a closed state, and the third convex shaft 1603 is in a closed position in the clamp spring 13. Then the third convex shaft 1603 is clamped by the clamp spring 13 to prevent the safety actuating lever 7 from moving freely in the closed state. After the string 14 is hooked, the catch 6 is buckled with the sear 8, the front end of the safety actuating lever 7 is located in the through slot 20 of the catch 6 and does not contact the string 14, and the inverted hook 22 of the nock sensor 10 is clamped with the fifth convex shaft 1605 to ensure that the nock sensor 10 is clamped with the catch 6, so that the catch 6 is restricted from rotating, and dry fire without external forces is prevented completely.

Hence one can see that, the sear 8 can prop against the trigger lever 3 by the mutual linkage structure of the safety lock lever 9, the nock sensor 10, the sensor lock lever 11 and the sear 8, and the trigger lever 3 cannot be automatically opened without external forces, so that dry fire is absolutely avoided.

Shown as FIG. 2 and 6, after triggering, the actions of each component are as followed.

The arrow 15 is inserted, the end of the arrow 15 is inserted between the catch 6 and the nock sensor 10, the arrow 15 firstly presses the nock sensor 10 downward, then enters into the catch 6, and finally closely touch the string 14, and the catch 6 has a tendency to open under the pulling force of the string 14, but is blocked by the front end of the sear 8.

Since the nock sensor 10 is pressed down by the arrow 15, the sensor lock lever 11 is clamped with the nock sensor 10, and the sensor lock lever 11 is rotated clockwise around the shaft, and the clamping groove 1101 is also rotated, so that the restriction of the clamping hook 81 is released.

The safety 5 is pushed forward to drive the safety actuating lever 7 to move. When the safety 5 is unlocked, the safety actuating lever 7 moves to the right under the restriction of the stroke limit groove 19 and the third convex shaft 1603, and the front end of the safety actuating lever 7 penetrates through the through slot 20 of the catch 6 to move toward the string 14. The horizontal movement of the safety actuating lever 7 can be ensured by the clamping action of the third convex shaft 1603 and the fourth convex shaft 1604. At the same time, the second convex shaft 1602 on the safety actuating lever 7 moves in the limit hole 18 in the safety lock lever 9 and touches the front wall of the limit hole 18 to drive the safety lock lever 9 to rotate clockwise, and the first convex shaft 1601 on the safety lock lever 9 releases the restriction on the sliding chute 82, so that two safety components on the trigger are opened.

The trigger lever 3 is rotated towards the rear of the crossbow, that is, to the left, so as to drive the trigger linkage 12 to move to the left. When the protrusion 4 on the linkage12 is pressed against by the fifth convex shaft 1605, the protrusion 4 is stopped, and the protrusion 4 is pressed against the inverted hook 22 of the nock sensor 10. The linkage12 pushes the sear 8 to the left, so that the sear 8 rotates clockwise, the sear 8 releases the restriction on the bottom of the catch 6, the catch 6 rotates counterclockwise, and the string drives the bolt to be launched, thus the trigger is completely triggered.

Hence one can see that, in the case of insertion of the arrow 15 and only switching on the safety actuating lever 7, the trigger cannot be triggered without pulling the trigger, thus accidental fire is prevented.

It should be noted that, the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail in above embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or substitute equivalents for some of the technical features thereof. However, any modification, equivalent substitution, improvement and etc., which are included the spirit and principle of the present invention, are intended to be included within the scope of the present invention.