JP3065177U - Spiral effect of the inner surface of the barrel on the spherical bullet of a toy air gun - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To stabilize the straightness of the trajectory of a spherical bullet fired from a toy air gun, thereby improving the accuracy of hitting a target. SOLUTION: A plurality of spiral grooves are provided on the inner surface of a barrel so that, when a shot spherical bullet passes through the barrel, a rotational motion can be given in a direction about an advancing direction due to contact friction.

Description

[Detailed description of the invention]

[0001]

[Problems to be solved by the invention]

 Among conventional toy air guns, a cylindrical barrel is used, and a spherical bullet fired using a cylindrical rubber packing for positioning a spherical bullet is used to determine the angle of incidence of the compressed gas at the time of firing and the barrel center. Due to the misalignment, the spherical bullet is not a perfect circle, the center of gravity is misaligned due to the difference in internal density, and the rubber packing is not a perfect circle, it is rotating in a random direction and flying.

In this case, in the case of a baseball ball, a spherical bullet is in the same state as a pitcher throwing a changing ball, that is, a force is applied in a certain direction different from the traveling direction by the Magnus effect (Bernoulli's theorem). As a result, the straightness of the trajectory becomes unstable and the accuracy of the hit decreases.

[0003]

[Means for Solving the Problems]

 A plurality of spiral grooves are provided on the inner surface of the barrel, and when a shot spherical bullet passes through the inside of the barrel, the spherical bullet is given a rotational movement in the direction of the traveling direction as an axis due to the contact friction of the step in the spiral groove. Thus, the force generated by the spherical bullet in a direction different from the traveling direction is canceled out, leveled, and the gyro effect is used to suppress the shake.

[0004]

[Effect of the invention]

 The ballistic trajectory of the spherical bullet is stabilized, and the accuracy of hitting the target is improved as a result.

[Brief description of the drawings]

FIG. 1 is a perspective view of a barrel of the present invention.

FIG. 2 is a sectional view of the barrel of the present invention.

FIG. 3 is a sectional view of a spherical bullet passing through the barrel of the present invention.

[Explanation of symbols]

 1 barrel 2 spiral groove 3 spherical bullet

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 24, 1999 (1999.5.2
4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (1)

[Utility model registration claims] When a shot spherical bullet passes through an inner surface of a barrel provided with a plurality of spiral grooves, the spherical bullet gives a rotational motion in the direction of the traveling direction as an axis due to contact friction of a step in the spiral groove. The spiral effect on the inner surface of the barrel of the toy air gun that stabilizes the trajectory straightness and improves the accuracy of hitting the target.