Configurable 3D Target Using Unitary Sheet Folding
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Solution Overview
Problem
Conventional firearm training targets are either two-dimensional, lacking durability and the ability to track projectile trajectories, or three-dimensional but expensive, cumbersome, and not economically viable for frequent use.
Innovation Solution
A self-supporting, three-dimensional target made from a single unitary sheet of corrugated material, such as cardboard, that can be easily assembled and configured into a human-like figure, featuring interlocking mechanisms and structural stiffness to maintain shape and stability under repeated impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional two-dimensional targets are used, then the target is simple and inexpensive to manufacture, but the target lacks durability and cannot track projectile trajectories
Solution Approach 1:
The patent transitions from conventional two-dimensional flat targets to a three-dimensional target structure. The unitary sheet is folded along predetermined fold lines to create depth and volume, enabling the target to track projectile trajectories by providing entry and exit points that reveal trajectory information. This dimensional change resolves the contradiction by maintaining simplicity of construction while achieving the functional complexity needed for trajectory tracking and improved durability.
Solution Approach 2:
The target structure is segmented into multiple functional zones including front surface, rear surface, and side surfaces, with predetermined fold lines creating distinct panels. This segmentation allows different portions of the target to serve specific functions (e.g., entry point detection, exit point detection, trajectory visualization) while maintaining overall structural integrity. The segmented design enables durability through distributed stress management while tracking trajectories through specialized surface areas.
2Reliability
If elaborate three-dimensional human analog targets are used, then the target provides realistic training scenarios, but the target is expensive and cumbersome to assemble and transport
Solution Approach 1:
The patent uses a three-dimensional folded structure from a two-dimensional unitary sheet to create realistic human analog training scenarios without requiring complex assembly. The folding process transforms a simple flat sheet into a volumetric form that resembles human body proportions and contours, providing realistic training while maintaining ease of transport in its flat configuration and simple assembly through predetermined fold lines.
Solution Approach 2:
The unitary sheet is pre-configured with predetermined fold lines and cutout patterns during manufacturing, allowing the target to be assembled simply by folding along these pre-marked lines. This preliminary action eliminates the need for complex assembly procedures, making the target easy to set up and transport while maintaining realistic three-dimensional training scenarios.
3Duration of action of stationary object
If conventional targets are mounted on flat surfaces, then the target is easy to install, but the target creates large damaged areas and loses functionality quickly
Solution Approach 1:
The patent transitions from a two-dimensional flat target to a three-dimensional folded structure, which distributes impact forces across multiple surfaces and panels. When a projectile impacts the target, the three-dimensional structure contains damage to specific localized areas rather than creating large damaged zones across a flat surface. This extends target usability while maintaining a compact form that minimizes the area affected by damage.
Solution Approach 2:
The target is segmented into multiple panels and surfaces separated by fold lines, so that damage to one panel does not compromise the entire target. Each panel can be independently assessed for damage, and the segmented structure allows the target to remain functional even when portions are damaged, thereby extending the duration of usable action.
4Strength
If a unitary sheet is folded into a three-dimensional structure, then the target becomes self-supporting and durable, but the manufacturing precision requirements increase
Solution Approach 1:
The unitary sheet is pre-marked with predetermined fold lines during manufacturing, clearly indicating where folding should occur. These pre-marked guidelines ensure consistent and accurate folding during assembly, reducing the precision burden on the assembler while maintaining structural stability. The preliminary marking of fold lines allows for tolerant manufacturing while achieving the required structural integrity.
Solution Approach 2:
The folding structure is segmented into discrete panels connected by predetermined fold lines, which act as natural hinges and stress distribution points. This segmentation allows each panel to be manufactured with standard tolerances while the folded assembly achieves overall structural stability through the geometric configuration and interlocking of panels at the fold lines.
Data Source
AI summary
A target for use in firearm training or target practice. In one embodiment the target is constructed out of a unitary sheet of carboard having anterior and posterior sides, and a plurality of interlocking members. The cardboard can be folded along a center line to bring the anterior and posterior side of the carboard into an overlapping alignment. Once in overlapping alignment the interlocking members of the carboard can be mated to produce a three-dimensional emulation.