Crossbow With Electrical Energizer And Collapsible Limbs

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Solution Overview

Problem

Crossbows are cumbersome, difficult to cock, and cause arm fatigue due to their large size and weight, making them inconvenient for hunting and competition events, and existing cocking accessories are cumbersome and time-consuming.

Innovation Solution

A crossbow design featuring a stock with a butt facing rearward, a body with a trigger housing and limb mount portion, and moveable limbs with an electrical energizer that allows for easier cocking and reduced size, using an electrical power source to generate the necessary draw weight without increasing the distance between limb ends.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If traditional crossbow design with long limbs is used, then appropriate draw weight is generated, but crossbow becomes large and requires substantial space

Engineering Contradiction:

Improvedraw weightVSAvoidwingspan

Core Design Contradiction:

ForceVSArea of stationary object

Solution Approach 1:

The limbs are designed to be collapsible and nest within each other when not in use, allowing the crossbow to be compact for storage and transportation while still providing sufficient limb length for generating appropriate draw weight during operation

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The crossbow incorporates adjustable limb configurations that can be extended or retracted based on operational needs, allowing the wingspan to be dynamically adjusted between compact storage mode and extended shooting mode to generate required draw weight

Inventive Principle:

Principle #15Dynamics

2Force

If traditional crossbow design is used, then draw weight is achieved, but crossbow becomes long and complicates use and carrying

Engineering Contradiction:

Improvedraw weightVSAvoidlength

Core Design Contradiction:

ForceVSLength of stationary object

Solution Approach 1:

The crossbow is divided into modular components including collapsible limbs, adjustable stock sections, and separable cocking mechanisms that can be configured to different lengths based on operational requirements while maintaining sufficient draw weight

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The crossbow features dynamically adjustable length through telescoping limbs and adjustable stock configuration, allowing it to be compact for carrying and extended for shooting while maintaining appropriate draw weight

Inventive Principle:

Principle #15Dynamics

3Strength

If traditional crossbow design is used, then structural integrity is maintained, but forward end becomes over-weighted causing arm fatigue

Engineering Contradiction:

Improvestructural integrityVSAvoidforward end weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The crossbow incorporates a counterbalancing mechanism at the rear of the stock that provides counterweight to offset the weight of the limbs and other forward components, reducing the effective weight at the forward end and minimizing arm fatigue during aiming and shooting

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Solution Approach 2:

The crossbow features adjustable weight distribution through movable counterweights and adjustable limb configurations that can be optimized to balance the forward end weight while maintaining structural integrity during operation

Inventive Principle:

Principle #15Dynamics

4Ease of operation

If manual cocking is used, then crossbow can be cocked, but it is difficult especially for archers lacking body strength

Engineering Contradiction:

Improvecocking easeVSAvoidcocking force required

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The crossbow incorporates a mechanical advantage system with pulleys, levers, or cam mechanisms that act as intermediaries between the user's pulling force and the draw string, reducing the cocking force required while still achieving full draw weight

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The crossbow replaces direct manual cocking with an assisted cocking mechanism that uses mechanical advantage principles to reduce the force needed, making it accessible to archers with varying levels of body strength

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

5Ease of operation

If existing cocking accessories are used, then cocking is assisted, but they are cumbersome and time-consuming

Engineering Contradiction:

Improvecocking assistanceVSAvoidcocking time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The cocking mechanism is integrated directly into the crossbow structure rather than being a separate accessory, combining the cocking function with the limb and trigger assembly to eliminate the need for separate cumbersome devices and reduce cocking time

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The crossbow design includes pre-configured attachment points and integrated mechanisms that allow for quick setup and immediate use, eliminating the time-consuming assembly and adjustment required by traditional cocking accessories

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11846487B2Archery bow having a motion generator and a device for pulling a draw cord

Publication Date: 2023.12.19 KRYSSE AS

AI summary

An archery bow is disclosed herein. The archery bow, in an embodiment, has a body, a plurality of limbs and a motion generator configured to cause the limbs to move. The archery bow also includes a draw cord and a device configured to be moveably coupled to the body. The device has a surface configured to be grasped. The device is configured to cause the draw cord to be pulled as a result of the device being moved relative to the body.