Pressure boosting structure for air gun barrels

Abstract

This invention relates to a pressurization structure for an air gun chamber, belonging to the field of pneumatic gun technology. It includes an outer barrel, with a spiral rubber sleeve and a cylinder coaxially connected to its rear end. The spiral rubber sleeve has a bore through which a projectile slides. A radially extending protrusion on the inner wall of the bore is used to press the projectile. The cylinder has a chamber communicating with the bore, and a rubber piston is installed inside the chamber, creating a sealed space between the rear of the projectile and the cylinder interior. A gas-cutting valve is located inside this sealed space. A magazine is connected to the outside of the cylinder to supply gas and the projectile to the chamber. This invention achieves higher initial kinetic energy of the projectile by pressurizing the chamber under the same magazine release pressure conditions.

Claims

1. A pressurizing structure for an air gun chamber, comprising an outer barrel, wherein a spiral rubber sheet and a cylinder are sequentially connected to the rear end of the outer barrel along the same axis; the spiral rubber sheet has a bore through which a projectile slides, and a protrusion extending radially along the inner wall of the bore for pressing the projectile; the cylinder has a chamber communicating with the bore, and a rubber piston is installed inside the chamber, thereby forming a sealed space between the rear of the projectile and the inside of the cylinder, an air valve is provided inside the sealed space, and a magazine for supplying gas and the projectile to the chamber is connected to the outside of the cylinder.

2. The pressurization structure for an air gun barrel as described in claim 1, wherein the air cut-off valve is located inside the cylinder and is slidable along the cylinder axis.

3. The pressurization structure for an air gun barrel as described in claim 2, wherein: The chamber has a frustum-shaped bore structure with a large-diameter end and a small-diameter end. The rubber piston is located at the large-diameter end of the chamber, and the gas valve slides at the small-diameter end of the chamber.

4. The pressurization structure for an air gun barrel as described in claim 3, wherein: The gas-cutting valve includes a valve stem that is slidably disposed inside the small-diameter end. Multiple valve plates are disposed on the outer wall of the valve stem. A valve head is connected to the rear end of the valve stem. A gas passage for gas flow is formed between two adjacent valve plates.

5. The pressurization structure for an air gun barrel as described in claim 4, wherein: The valve plate extends radially along the valve stem, and its sidewall away from the valve stem fits against the inner wall of the chamber. Multiple valve plates are distributed in a circumferential array on the outer wall of the valve stem.

6. The pressurization structure for an air gun barrel as described in claim 1, wherein: An air inlet is provided on the outer wall of the cylinder, and an air outlet sleeve is provided at the upper end of the magazine, which communicates with the air inlet. The air outlet sleeve is pressurized and sealed with the air inlet.

7. The pressurization structure for an air gun barrel as described in claim 1, wherein: The magazine has a magazine mouth on its side wall that can hold the projectile, and a push rod is provided below the cylinder to push the projectile into the chamber after the magazine mouth holds the projectile.

8. The pressurization structure for an air gun barrel as described in claim 1, wherein: The front end of the cylinder is inserted into the inner bore of the upper-spinning rubber, and the outer wall of the front end of the cylinder is sealed with the inner wall of the inner bore by an interference fit.

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