US20170153081A1

US20170153081A1 - Gun Bolt Assembly of Air-Soft Pistol

Info

Publication number: US20170153081A1
Application number: US14/992,034
Authority: US
Inventors: Shih-Che Hu
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-26
Filing date: 2016-01-11
Publication date: 2017-06-01
Also published as: TWM518764U

Abstract

A gun bolt assembly of air-soft pistol is disclosed to include an air cylinder, a slide carriage, a bridge member affixed to an inner rear side of the slide carriage, a piston affixed to the front side of the base of the bridge member and inserted through a rear opening of the air cylinder into the inside of the air cylinder, and a second spring positioned inside the air cylinder and the piston and axially connected between the air cylinder and the piston. Thus, the second spring will not fall off easily or wear quickly, allowing smooth displacement between the air cylinder and the piston without deviation from the accurate moving path.

Description

NOTICE OF COPYRIGHT

A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to any reproduction by anyone of the patent disclosure, as it appears in the United States Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever.

BACKGROUND OF THE PRESENT INVENTION

Field of Invention
The present invention relates to gun technology and more particularly, to a gun bolt assembly of air-soft pistol, which greatly enhances the stability of relative movement between the air cylinder and the piston.
Description of Related Arts
Regular toy air-soft pistols are designed like a real pistol. These toy air-soft pistols have the same outer appearance of a real pistol. They operate in the same manner as a real pistol. Further, similar to a real pistol, these toy air-soft pistols produce recoil upon shooting. Enhancing the generation of recoil of a toy gun greatly attracts toy gun players.
An air-soft toy pistol utilizes high-pressure gas to drive the gun bolt assembly. Traction between the slide carriage and air cylinder of the gun bolt assembly is achieved by a spring member. When high-pressure gas is delivered into the air cylinder to drive a bullet toward the outside, the piston and the slide carriage are simultaneously forced backwards by high-pressure gas to produce recoil. At this time, the spring member is stretched out. After interruption of the supply of high-pressure gas, the elastic restoring energy of the spring member pulls the piston back.
FIGS. 1 and 2 illustrate a gun bolt assembly “a” according to the prior art of an air-soft pistol, which comprises a slide carriage 10 and an air cylinder 20. The slide carriage 10 has a bridge member 30 fixedly mounted in a rear side thereof. The bridge member 30 comprises a base 301, two rails 302 forwardly extended from two opposite lateral sides of the base 301 (see FIG. 1). Further, a piston 40 is affixed to a front side of the base 301 (see FIG. 2). Further, a screw 401 is inserted through the center of a packing member 402 and driven into the front side of the piston 40 to lock a piston cushion 403 to the front side of the piston 40. The air cylinder 20 is a hollow member, comprising an air inlet 201 located at a bottom side thereof, an air outlet 202 located at a front side thereof, and an opening 203 located at an opposing rear side thereof. Further, a wad 204 is mounted inside the air cylinder 20 behind the air outlet 202. A first spring 205 is mounted around a front side of the wad 204 to support the wad 204 inside the air cylinder 20. The piston 40 is inserted through the opening 203 into the inside of the air cylinder 20. Further, two second springs 50 are disposed at a top outside relatively to the air cylinder 20 and base 301 and connected between the air cylinder 20 and base 301 for enabling the air cylinder 20 and the piston 40 to be moved relative to each other within a limited range.
Thus, as shown in FIG. 2, when high-pressure gas is fed into the air cylinder 20 to drive a bullet toward the outside, the piston 30 and the slide carriage 10 are forced backwards by a reversed flow of high-pressure gas, thereby producing recoil. At the same time, the second spring 50 is forced by high-pressure gas to stretch out (see FIG. 3). After interruption of the supply of high-pressure gas, the air cylinder 20 and the piston 40 are pulled back to their former position by the elastic restoring force of the second spring 50 (see FIG. 4).
However, because the distance between the air cylinder 20 and the slide carriage 10 is limited, the wire diameter of the second springs 50 must be limited, lowering the elastic strength and generation of recoil. Further, these second springs 50 wear quickly with use, shortening the lifespan. Further, because the second springs 50 are connected between the air cylinder 20 and the base 301 at the top outside, they tend to fall off. Further, because the pulling force between the air cylinder 20 and the base 301 is produced at the top outside of the air cylinder 20, the moving path of the air cylinder 20 can easily be deviated upwardly from the rails 302, causing the air cylinder 20 unable to push the bullet into the gun barrel accurately. An improvement in this regard is desired.

SUMMARY OF THE PRESENT INVENTION

The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a gun bolt assembly for air-soft pistol, which has the second spring axially connected between the air cylinder and the piston to prevent falling off and to prolong lifespan, enabling the air cylinder and the piston to be moved stably without deviation.
To achieve this and other objects of the present invention, a gun bolt assembly of air-soft pistol comprises a slide carriage and an air cylinder. The slide carriage has a bridge member fixedly mounted in a rear side thereof. The bridge member comprises a base, two rails forwardly extended from two opposite lateral sides of the base, a piston fixedly mounted at a front side of the base, a fastening component fastened to a front side of the piston to lock a piston cushion to the front side of the piston. The air cylinder comprises an air inlet located at a bottom side thereof, an air outlet located at a front side thereof, a wad mounted therein at a rear side relative to the air outlet, a first spring mounted around a front side of the wad to support the wad inside the air cylinder, an opening located at a rear side thereof for the insertion of the piston into the inside of the air cylinder, and a second spring connected between the air cylinder and the slide carriage for enabling the air cylinder to be moved back and forth along the two rails within a limited range. The second spring has a front end thereof positioned inside the air cylinder, and a rear end thereof inserted through the fastening component and the piston cushion and connected to an inside part of the piston.
By means of axially connecting the second spring between the air cylinder and the piston, the second spring is prohibited from falling off. This second spring mounting arrangement allows the use of a large diameter metal wire material for making the second spring to prolong lifespan. Further, because the second spring is axially connected between the air cylinder and the piston, the air cylinder can be moved along the two rails stably without deviation.
Preferably, the air cylinder further comprises a locating pin transversely mounted therein. The piston has a plug mounted in a rear side thereof and held in place by the base of said bridge member. The second spring has the front end thereof connected to the locating pin, and the rear end thereof connected to the plug. Further, the piston comprises a front part and a rear part. The rear part comprises two screw holes longitudinally disposed therein at two opposite lateral sides and affixed to the base of the bridge member by two screw bolts. The fastening component is threaded into the front part to lock the piston cushion to the front part. The plug is plugged into the rear part. Further, the rear part is relatively smaller than the front part. The bridge member further comprises two arched constraint flanges protruded from the front side of the base at different elevations and respectively abutted against opposing top and bottom sides of the rear part of said piston.
Preferably, the fastening component comprises a head, a shank backwardly extended from a rear side of said head, an outer thread spirally extended around the periphery of the shank, an axial hole axially cut through the head and the shank for the passing of the second spring, and a tool groove located on an opposing front side of the head for the positioning of a hand tool to drive the fastening component into or out of the piston.
Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of a conventional air-soft pistol, illustrating the arrangement of a gun bolt assembly according to the prior art.

FIG. 2 is a sectional view, in an enlarged scale, of a part of FIG. 1, illustrating an operating status of the gun bolt assembly during firing.

FIG. 3 corresponds to FIG. 2, illustrating an operating status of the gun bolt assembly after firing.

FIG. 4 corresponds to FIG. 3, illustrating the slide carriage returned to the previous position.

FIG. 5 is an exploded view of an air-soft pistol, illustrating the arrangement of a gun bolt assembly in accordance with the present invention.

FIG. 6 is a sectional side view of the air-soft pistol shown in FIG. 5.

FIG. 7 is an exploded view of a part of the gun bolt assembly in accordance with the present invention.

FIG. 8 is a sectional view, in an enlarged scale, of a part of FIG. 6, illustrating an operating status of the gun bolt assembly during firing.

FIG. 9 corresponds to FIG. 8, illustrating the slide carriage moved backwards after firing.

FIG. 10 corresponds to FIG. 9, illustrating the slide carriage returned to the previous position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 5 and 6, a gun bolt assembly A of an air-soft pistol is shown comprising a slide carriage 1 and an air cylinder 2.
The slide carriage 1 has a bottom open side (see FIG. 5), and a bridge member 3 fixedly mounted on the inside near a rear side thereof. The bridge member 3 comprises a base 31, two rails 32 forwardly extended from two opposite lateral sides of the base 31, and two arched constraint flanges 33 located at a front side of the base 31 at different elevations (see FIG. 7 and FIG. 8). Further, a piston 4 is affixed to the front side of the base 31. The piston 4 comprises a front part 41 and a rear part 42. A fastening component 43 is threaded into the front part 41 to lock a piston cushion 44 to a front side of the front part 41. A plug 45 is plugged into the rear part 42 of the piston 4. Further, two screw holes 421 are longitudinally disposed in the rear part 42 at two opposite lateral sides. Two screw bolts 46 are forwardly inserted through the base 31 and respectively threaded into the screw holes 421 to lock the piston 4 to the front side of the base 31, enabling the plug 45 to be stopped against the front side of the base 31. Further, the rear part 42 is relatively smaller than the front part 41. Further, the two arched constraint flanges 33 are respectively abutted against opposing top and bottom sides of the rear part 42.
Further, the fastening component 43 comprises a head 431, a shank 432 backwardly extended from a center part of a back side of the head 431, an outer thread 433 spirally extending around the periphery of the shank 432 for enabling the shank 432 to be threaded into the front part 41 of the piston 4, an axial hole 434 axially cut through the head 431 and the shank 432, and a tool groove (such as keystone groove, crossed groove, etc.) 435 located on an opposing front side of the head 431 for the positioning of a hand tool (such as screwdriver) to drive the fastening component 43 into or out of the front part 41 of the piston 4.
The air cylinder 2 is a hollow member, comprising an air outlet 21 located at a front side thereof, an opening 22 located at an opposing rear side thereof for the insertion of the piston 4 into the inside of the air cylinder 2 to let the piston cushion 44 be slidably abutted against the inside wall of the air cylinder 2, an air inlet 23 located at a bottom side thereof, a wad 24 mounted inside the air cylinder 2 behind the air outlet 21, a first spring 25 mounted around a front side of the wad 24 and stopped against the inside wall of the air cylinder 2 behind the air outlet 21, a second spring 26 connected between the air cylinder 2 and the piston 4, and a locating pin 27 transversely mounted inside the air cylinder 2 and stopped at a rear side of the wad 24. The second spring 26 has a front end thereof connected to the locating pin 27, and an opposing rear end thereof inserted through the axial hole 434 of the fastening component 43 and the piston cushion 44 and then connected to the plug 45. Further, the wire diameter of the second spring 26 is relatively larger than the prior art design.
When operating the air-soft pistol to shoot a bullet, hammer 5 is biased forwards (see FIG. 8), and an air intake device 6 is activated for letting high-pressure gas to go through the air inlet 23 into the inside of the air cylinder 2, driving a bullet 7 toward the outside. At the same time, the piston 4 and the slide carriage 1 are forced backwards by reversed flow of high-pressure gas to produce recoil (see FIG. 9), and the second spring 26 is forced by high-pressure gas to stretch out, producing an elastic restoring force for pulling back the piston 4 and the air cylinder 2 after the shooting of the bullet (see FIG. 10).
As stated above, this invention has the second spring 26 be axially mounted inside the air cylinder 2 and connected between the air cylinder 2 and the piston 4, and therefore, this invention eliminates the disadvantage of the use of a small wire diameter spring member due to space limitation as seen in the prior art design, and allows the use of a large wire diameter spring member for producing heavy recoil. The arrangement of the second spring 26 prevents falling off and prolongs lifespan. Further, because the second spring 26 is axially connected between the air cylinder 2 and the piston 4, the air cylinder 2 can be moved along the two rails 32 stably without deviation (see FIG. 5), enabling the air cylinder 2 to deliver a bullet 7 into the gun barrel 8 (see FIG. 10) smoothly and accurately. Thus, this invention effectively improves the drawbacks of the prior art design.
Although a particular embodiment of this invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of this invention. Accordingly, this invention is not to be limited except as by the appended claims.

Claims

What is claimed is:

1. A gun bolt assembly of air-soft pistol, comprising:

a slide carriage having a bridge member fixedly mounted in a rear side thereof, said bridge member comprising a base, two rails forwardly extended from two opposite lateral sides of said base, a piston fixedly mounted at a front side of said base, a fastening component fastened to a front side of said piston to lock a piston cushion to the front side of said piston; and

an air cylinder comprising an air inlet located at a bottom side thereof, an air outlet located at a front side thereof, a wad mounted therein at a rear side relative to said air outlet, a first spring mounted around a front side of said wad to support said wad inside said air cylinder, an opening located at a rear side thereof for the insertion of said piston into the inside of said air cylinder, and a second spring connected between said air cylinder and said slide carriage for enabling said air cylinder to be moved back and forth along said two rails within a limited range;

wherein said second spring has a front end thereof positioned inside said air cylinder and a rear end thereof inserted through said fastening component and said piston cushion and connected to an inside part of said piston.

2. The gun bolt assembly of air-soft pistol as claimed in claim 1, wherein said air cylinder further comprises a locating pin transversely mounted therein; said piston has a plug mounted in a rear side thereof and held in place by said base of said bridge member; said second spring has the front end thereof connected to said locating pin and the rear end thereof connected to said plug.

3. The gun bolt assembly of air-soft pistol as claimed in claim 2, wherein said piston comprises a front part and a rear part, said rear part comprising two screw holes longitudinally disposed therein at two opposite lateral sides and affixed to said base of said bridge member by two screw bolts; said fastening component is threaded into said front part to lock said piston cushion to said front part; said plug is plugged into said rear part.

4. The gun bolt assembly of air-soft pistol as claimed in claim 3, wherein said rear part is relatively smaller than said front part; said bridge member further comprises two arched constraint flanges protruded from the front side of said base at different elevations and respectively abutted against opposing top and bottom sides of said rear part of said piston.

5. The gun bolt assembly of air-soft pistol as claimed in claim 4, wherein said fastening component comprises a head, a shank backwardly extended from a rear side of said head, an outer thread spirally extended around the periphery of said shank, an axial hole axially cut through said head and said shank for the passing of said second spring, and a tool groove located on an opposing front side of said head.