US20070181116A1

US20070181116A1 - Air gun

Info

Publication number: US20070181116A1
Application number: US11/347,844
Authority: US
Inventors: Wilson Wei
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-06
Filing date: 2006-02-06
Publication date: 2007-08-09

Abstract

Disclosed is an air gun in which a valve body is mounted inside a housing above a magazine spring; a spring is mounted in the valve body to push an air outlet nozzle tube to seal an air inlet; a slide is supported on a spring outside the valve body for returning a cylinder after each movement of the cylinder; a hit pin is movably mounted in a hole at a rear side of the cylinder; a hammer is pivoted to the housing for driving the cylinder; a hammer strut is coupled with a top end thereof to the hammer for biasing the hammer to drive the cylinder and a bottom end thereof to a retaining member, which has a hooked portion hooked on a part of a pressing screw being pivoted to the housing for locking an air bomb inside the housing; a hammer is pivoted to the housing, having a shear engaging portion, which is engageable with a shear when the hammer is rotated to a rear end side of the housing, which shear being coupled to the trigger through a trigger bar such that when the trigger is pressed, the trigger bar is driven to move the shear away from the shear engaging portion of the hammer.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates an air gun for shooting a BB bullet or paint bullet by a compressed gas and more particularly, to such an air gun, which has a simple structure for easy assembly and quick unloading/unloading of the air bomb, and allows continuous shooting.
2. Description of the Related Art
U.S. Pat. No. 6,026,797 discloses an air gun for shooting a bullet by a supplied compressed gas and performing blow-back for shooting the next bullet by moving a sliding portion backward in the air gun. According to this design, the air gun comprises valve body 28 formed in a cylindrical shape and having a hollow bullet supplying nozzle chamber 29, a bullet supplying nozzle 36 partially extending out of the hollow bullet supplying nozzle chamber 29, a spring presser 37 arranged on the gun rear end side of the bullet supplying nozzle 36 and approximately has the same diameter as an inside diameter of the bullet supplying nozzle chamber 29, a slide 3, a cylinder 8 formed in a sleeve shape for closing the gun rear end side and fixed to the gun rear end side of the slide 3, a hit pin 9 inserted into a through hole approximately formed at the center of a gun rear end side face opposed to the opening of the cylinder 8 from an inner side of the cylinder 8 and movable by a gas bomb A, a hammer 10 arranged on the gun rear end side of the cylinder 8, a hammer shaft 11 rotatably arranged in a lower portion of the hammer 10 and fixed to the body of the air gun 1 so that the hammer 10 is freely rotated around the hammer shaft 11 as a center, a hammer strut 19 rotatably attached to the hammer shaft 11, a shear engaging portion 13 arranged in the hammer 10 as a projection engageable with a shear 14 when an upper portion of the hammer 10 is rotated to the gun rear end side, a trigger bar 26 arranged between an upper end of the trigger 23 and the shear 13 and rotatably engaged with the trigger 23 at an upper end of the trigger 23. When the trigger 23 is pressed, the trigger bar 26 is forced to move the shear 14 away from the shear engaging portion 13, so that the hammer 10 is forced by the hammer strut 19 to push the hit pin 9 at the rear side of the cylinder 8 out of the bullet supplying nozzle chamber 29, allowing flowing of compressed air into the bullet supplying nozzle chamber 29 transiently in a rush, and therefore the bullet supplying nozzle 36 is forced to strike the bullet, and therefore the bullet is shot. At the same time, the cylinder 8 and the hit pin 9 are moved to return the hammer 10 for enabling the hammer 10 to be held in place by the shear 14, and thereafter the cylinder 8 is returned by the spring 4 in the slide 4. Therefore, the air gun can shoot repeatedly. This design of air gun is still not satisfactory in function. According to this design, the bullet supplying nozzle 36 wears quickly with use because it is frequently moved and impacted. Another drawback of this design of air gun is its complicated structure and complicated assembly procedure. Because the air gun uses a compressed gas from the air bomb A to drive bullet, replacement of the air bomb A or refilling of compressed gas is necessary. When removing the air bomb A for a replacement or refilling of compressed air, the user must loosen the pressing screw B for the air bomb A to be taken away from the air gun from the bottom or lateral side. This procedure is complicated, affecting the shooting speed. Further, the air bomb A may fall to the ground accidentally during the unloading action, causing a contamination. Therefore, it is desirable to provide an air gun that eliminates the aforesaid drawbacks

SUMMARY OF THE INVENTION

The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide an air gun, which has a simple structure for easy assembly and quick unloading/unloading of the air bomb. It is another object of the present invention to provide an air gun, which allows continuous shooting.
To achieve this and other objects of the present invention, the air gun in accordance with the present invention is shown comprised of a housing, a valve body, a cylinder, a hammer, a shear, a hammer strut, a trigger bar, a trigger, and a pressing screw. The housing houses the parts of the air gun, comprising a grip portion. The trigger is pivoted to the bottom side of the housing in front of the grip portion. The valve body is mounted inside the housing above a magazine spring. A spring is mounted in the valve body to push an air outlet nozzle tube to seal an air inlet. A slide is supported on a spring outside the valve body and adapted to return the cylinder after each movement of the cylinder. A hit pin is movably mounted in a hole at the rear side of the cylinder. The hammer is pivoted to the housing, having a bell for driving the cylinder. The hammer strut has a top end coupled to the hammer for biasing the hammer to drive the cylinder, and a bottom end coupled to a retaining member which has a hooked portion hooked on a part of the pressing screw to hold an air bomb inside the housing. The hammer has a shear engaging portion, which is engageable with the shear when the hammer is rotated to a rear end side of the housing. The shear is coupled to the trigger through the trigger bar such that when the trigger is pressed, the trigger bar is driven to move the shear away from the shear engaging portion of the hammer.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of an air gun according to the present invention.
FIG. 2 is a schematic sectional side view of the present invention, showing the air bomb inserted into the housing of the air gun.
FIG. 3 corresponding to FIG. 2, showing the air bomb locked inside the housing.
FIG. 4 corresponds to FIG. 3, showing the hammer turned outwards.
FIG. 5 corresponds to FIG. 4, showing a bullet driven out of the housing.
FIG. 6 corresponds to FIG. 5, showing the hammer turned outwards after shooting.
FIG. 7 is a side view of a part of the present invention, showing the relationship among the trigger, the trigger bar, the shear, the hammer, and the hammer strut.
FIG. 8 is a side plain view of an air gun constructed in accordance with U.S. Pat. No. 6,026,797.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 1˜7, an air gun in accordance with the present invention is shown comprised of a housing 1, a valve body 28, a cylinder 8, a hammer 10, a shear 14, a hammer strut 19, a trigger bar 26, a trigger 23, and a pressing screw B. The housing 1 houses the parts of the air gun, comprising a grip portion 1 a. The trigger 23 is pivoted to the bottom side of the housing 1 in front of the grip portion 1 a. The valve body 28 is mounted inside the housing 1 above a magazine spring 7. A spring 200 is mounted in the valve body 28 to push an air outlet nozzle tube 29 to seal an air inlet 201. A slide 3 is supported on a spring 4 outside the valve body 28 and adapted to return the cylinder 8 after each movement of the cylinder 8. A hit pin 9 is movably mounted in a hole 80 at the rear side of the cylinder 8. The hammer 10 is pivoted to the housing 1, having a bell 90 for driving the cylinder 8. The hammer strut 19 has a top end coupled to the hammer 10 for biasing the hammer 10 to drive the cylinder 8, and a bottom end coupled to a retaining member 100, which has a hooked portion 101 hooked on a part of the pressing screw B to hold an air bomb A inside the housing 1. The hammer 10 has a shear engaging portion 13, which is engageable with the shear 14 when the hammer 10 is rotated to a rear end side of the housing 1. The shear 14 is coupled to the trigger 23 through the trigger bar 26 such that when the trigger 23 is pressed, the trigger bar 26 is driven to move the shear 14 away from the shear engaging portion 13 of the hammer 10.
When in use, the hammer 10 is turned to the shooting position where the shear 14 is engaged with the shear engaging portion 13. When the trigger 23 is pressed, the trigger bar 26 is driven to move the shear 14 away from the shear engaging portion 13 of the hammer 10, enabling the hammer strut 19 to bias the hammer 10, thereby causing the bell 90 to hit the hit pin 9 to move the an air outlet nozzle tube 29, allowing the compressed gas to rush out of the air bomb A through the air inlet 201 into the air outlet nozzle tube 29 to deliver one bullet forward and simultaneously to force the cylinder 8 backwards so that the hammer 10 is returned by the backwardly moving cylinder 8 into engagement with the shear 14, and thereafter the cylinder 8 is pushed forwards to the former position by the spring power of the spring 4 at the slide 3 for the next shooting action. Thus, the air gun achieves a repeat shooting function. Because it is not necessary to seal the air outlet nozzle tube 29 when shooting the bullet, the air outlet nozzle tube 29 does not wear quickly with use. Because the structure of the air gun is simple, the assembly procedure is also simple. The hammer strut 19 is coupled between the hammer 10 and the retaining member 100, which has a hooked portion 101 hooked on a part of the pressing screw B to hold an air bomb A inside the housing 1. When the retaining member 100 is biased with one single finger, the hooked portion 101 is disengaged from the pressing screw B, and the pressing screw B is turned about a pivot 102 to release the air bomb A, and the user can use the other hand to catch the air bomb A. After the air bomb A has been filled with a compressed gas and inserted into the housing 1 again, the pressing screw B is turned about the pivot 102 and moved over the hooked portion 101 of the retaining member 100 and stopped against the bottom side of the air bomb A, and then the pressing screw B is fastened up, locking the air bomb A inside the housing 1.
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.

Claims

1. A air gun comprising a housing, a valve body, a cylinder, a hammer, a shear, a hammer strut, a trigger bar, a trigger, and a pressing screw, wherein said housing houses the parts of the air gun, comprising a grip portion; said valve body is mounted inside said housing above a magazine spring; a spring is mounted in said valve body to push an air outlet nozzle tube to seal an air inlet; a slide is supported on a spring outside said valve body and adapted to return said cylinder after each movement of said cylinder; a hit pin is movably mounted in a hole at a rear side of said cylinder; said hammer is pivoted to said housing for driving said cylinder; said hammer strut has a top end coupled to said hammer for biasing said hammer to drive said cylinder, and a bottom end coupled to a retaining member, which has a hooked portion hooked on a part of said pressing screw to hold an air bomb inside said housing; said hammer has a shear engaging portion, which is engageable with said shear when said hammer is rotated to a rear end side of said housing; said shear is coupled to said trigger through said trigger bar such that when said trigger is pressed, said trigger bar is driven to move said shear away from the shear engaging portion of said hammer.