Patent Application
20170191798
Field of the Invention
The present invention relates to a crossbow, and more particularly to an angle adjusting structure for an aiming seat of the crossbow.
Description of the Prior Art
A conventional crossbow is comprised of a body and a bow arm, wherein the body includes a grip handle arranged on a rear end thereof, and the grip handle has a trigger set formed on a front end thereof. The trigger set has an aiming seat disposed thereon, and the aiming seat has a rifle scope mounted thereon. The bow arm is formed in an arc shape and is fixed on a front end of the body, and the bow arm intersects with the body in a cross shape, wherein between two ends of the bow arm is defined a bowstring. In operation, the bowstring is pulled backward and tightly so as to retain with the trigger set, and an arrow abuts against the body and the bowstring, thereafter a target object is aimed by the rifle scope, the trigger set is triggered so that the bowstring removes from the trigger set, hence the arrow is pushed by the bowstring to shoot the target object.
However, an angle adjusting structure for the aiming seat of the conventional crossbow contains a rotatable wheel, and the rotatable wheel drives a threaded rod to move upward and downward, thus adjusting the angle of the aiming seat in a longitudinal direction. After the arrow shoots from the crossbow, vibration conducts from the bowstring to the body, and vibration and friction occur between the rotatable wheel and the threaded rod to change the angle of the aiming seat relative to the rifle scope, so the target object cannot be aimed by the crossbow precisely.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
The primary objective of the present invention is to provide an angle adjusting structure for an aiming seat of a crossbow which adjusts an angle of an aiming seat stably in a longitudinal direction, and a screwing bolt screws with a threaded hole of a triggering support so that the screwing bolt moves downward to force the aiming seat, and after an arrow shoots from a bowstring, a vibration conducts to the body so as to avoid rotation and friction of a rotatable wheel and a threaded rod, thus preventing the angle of the aiming seat changes relative to a rifle scope.
Another objective of the present invention is to provide an angle adjusting structure for an aiming seat of a crossbow which is capable of aiming a target exactly and easily.
To obtain above-mentioned objectives, an angle adjusting structure for an aiming seat of a crossbow provided by the present invention contains: a crossbow including a body, a bow arm, and an adjuster.
The body includes a grip handle formed on a rear end thereof, the bow arm is formed in an arc shape and is disposed on a front end of the body, and the body intersects with the bow arm, the bow arm includes a bowstring fixed on two ends of thereof.
The adjuster includes: a trigger set and an aiming seat.
The trigger set is arranged on a front side of the grip handle of the body and has a triggering support, and the triggering support has a threaded hole defined on a top thereof.
The aiming seat is mounted on an upper side of the triggering support and is configured to connect with a rifle scope, and the aiming seat has an orifice horizontally defined on a middle section thereof and rotatably connecting with the triggering support by using a coupling shaft. The aiming seat also has a front segment formed in front of the orifice, and the aiming seat has a rear segment arranged behind the orifice, wherein between the front segment and the triggering support is defined a resilient element configured to push the front segment of the aiming seat upward, and the rear segment has a threaded rod extending downward from a bottom thereof, the threaded rod screws with a rotatable wheel between the aiming seat and the trigger set, such that the rotatable wheel rotates to drive the threaded rod and the rear segment of the aiming seat to move upward, and the front segment of the aiming seat reversely moves upward and downward along the coupling shaft.
The aiming seat further has an aperture defined between the orifice and the threaded rod, such that a screwing bolt screws with the threaded hole of the triggering support via the aperture and forces the aiming seat.
The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
Referring to
The triggering support 311 has a groove 3112 formed on the top thereof, and the rotatable wheel 36 has a post 361 extending downward from a central position thereof and inserting into the groove 3112, wherein the post 361 has a peripheral slot 3611 defined around a peripheral wall thereof, and the peripheral slot 3611 is configured to accommodate a limiting column 38 of the triggering support 311, such that the rotatable wheel 36 is fixed by the limiting column 38 to rotate in the groove 3112.
The triggering support 311 has a trench 3113 defined on the top thereof beside the groove 3112, and the rotatable wheel 36 has plural recesses 362 arranged around a bottom thereof, between the rotatable wheel 36 and the trigger support 311 is defined an elastic positioning unit 39, and the elastic positioning unit 39 has a spring 391 and a steel ball 392 which are housed in the trench 3113 of the triggering support 311, and the steel ball 392 is pushed by the spring 391 to move upward and selectively retain in one of the plural recesses 362, thus adjusting the rotatable wheel 36 in a multi-section adjusting manner.
As adjusting an angle of the aiming seat 32 in a longitudinal direction, the rifle scope 33 is removed from the aiming seat 32, and the screwing bolt 37 is unscrewed so that the aiming seat 32 is not forced by the screwing bolt 37, and the rotatable wheel 36 rotates in a multi-section rotating manner to drive the threaded rod 324 and the aiming seat 32 to move upward and downward, such that the front segment 322 of the aiming seat 32 reversely moves upward and downward along the coupling shaft 34 so that the resilient element 35 moves between the front segment 322 of the aiming seat 32 and the triggering support 311, and the aiming seat 32 is adjustably moved to a required angle in the longitudinal direction, thereafter the screwing bolt 37 screws with the threaded hole 3111 of the triggering support 311 so that the screwing bolt 37 moves downward to force the aiming seat 32, and the rifle scope 33 is connected with the aiming seat 32.
As shown in
As illustrated in
Accordingly, the angle adjusting structure of the present invention has advantages as follows:
The rotatable wheel 36 rotates to drive the threaded rod 324 and the rear segment 323 of the aiming seat 32 to move upward and downward, and the resilient element 35 acts between the front segment 322 of the aiming seat 32 and the triggering support 311, hence the angle of the aiming seat 32 is adjusted stably in the longitudinal direction, and the screwing bolt 37 screws with the threaded hole 3111 of the triggering support 311 so that the screwing bolt 37 moves downward to force the aiming seat 32, and after an arrow shoots from the bowstring 21, a vibration conducts to the body 10 so as to avoid rotation and friction of the rotatable wheel 36 and the threaded rod 324, thus preventing the angle of the aiming seat 32 changes relative to the rifle scope 33. Preferably, the crossbow is capable of aiming a target exactly and easily.
While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
