Rotating Retainer for Air Gun Bullet Retention
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Solution Overview
Problem
Conventional air guns face issues with bullet retention due to strong upward biasing forces, leading to friction resistance, potential member damage, and reduced firing performance, as the retainer's design is unnatural and inefficient.
Innovation Solution
A rotating retainer design that aligns the bullet's center with the inner barrel's center, deflecting impact and reducing friction, allowing for stable bullet release and improved air gun performance by positioning the retainer above the inner barrel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the retainer is biased upwards by a strong retainer spring to retain the bullet, then the bullet retention is improved, but the friction resistance increases and members are likely to break
Solution Approach 1:
The retainer is inverted so that it biases downward instead of upward, reversing the direction of the biasing force. This allows the bullet to be retained without generating friction resistance against the inner barrel, as the retainer no longer pushes upward against the bullet during the shooting cycle.
Solution Approach 2:
The biasing direction parameter of the retainer is changed from upward to downward. By changing the direction of the biasing force, the retainer can maintain bullet retention functionality while eliminating the harmful friction resistance that caused member breakdown.
2Device complexity
If the retainer is positioned under the inner barrel, then the structure is simplified, but the bullet cannot be retained reliably
Solution Approach 1:
The retainer is inverted both in position (from under to above the inner barrel) and in biasing direction (from upward to downward). This inversion allows the retainer to be positioned above the inner barrel while still achieving reliable bullet retention through the downward biasing force.
3Power
If the inner barrel moves backward to hit the valve, then high pressure gas is injected, but the back-end collides with the retainer and bullet causing resistance
Solution Approach 1:
The retainer is inverted to position above the inner barrel with downward biasing, which eliminates the collision between the back-end of the inner barrel and the retainer/bullet during backward movement. The downward biasing ensures the retainer does not interfere with the inner barrel's rearward motion needed for valve actuation.
4Ease of manufacture
If the retainer is positioned above the inner barrel, then the design is more natural, but the upward biasing force creates friction and wear
Solution Approach 1:
The retainer is inverted to use downward biasing instead of upward biasing. This maintains the natural design advantage of positioning the retainer above the inner barrel while eliminating the friction and wear problems caused by upward biasing, thereby extending component endurance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The rotating retainer design enhances the air gun's endurance and performance by minimizing resistance and allowing for a more natural design, ensuring consistent bullet speed and reduced wear on components.
Implementation Method 1
the retainer (7) is installed above the chamber (6) and the inner barrel (10), and is placed so that it can rotate in an anteroposterior direction of the gun centering on a retainer rotational axis (70) and is biased rotatably towards the front of the gun by the retainer spring (71)
Implementation Method 2
A bullet W is urged in a direction of the rear side of the air gun by a magazine spring 101
Implementation Method 3
The main spring (11) is placed on the peripheral surface of the muzzle side of the inner barrel (10) and moves the inner barrel (10) towards the rear end of the gun
Data Source
AI summary
An air gun includes a retainer pivotably connected inside the air gun and having a bullet abutment part that pivots into and out of a bullet-receiving chamber. The retainer is resiliently biased to pivot in a forward direction so that the bullet abutment part is urged into the bullet-receiving chamber. In a trigger rest position, a hollow inner barrel prevents a bullet and the bullet abutment part from entering into the bullet-receiving chamber. Upon pulling the trigger, the inner barrel moves in a forward direction to permit the bullet and the bullet abutment part to enter the bullet-receiving chamber where the bullet abutment part contacts and retains the bullet therein. Upon pulling the trigger further, the inner barrel moves in a rearward direction to capture the bullet therein while causing the retainer to pivot in the rearward direction to thereby move the bullet abutment part out of the bullet-receiving chamber.