Adjustable Restraint Device With Elastic Overtightening Prevention
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Solution Overview
Problem
Current restraint devices lack the ability to adjust distance between bracelets, convert between 'chain style' and 'hinge style', and prevent overtightening during use.
Innovation Solution
A restraint device design featuring a housing with a pivotally coupled arm, a bar with teeth and a projection, and a spring mechanism that allows for adjustable engagement and disengagement, along with a sleeve that enables conversion between styles and reduces overtightening by elastic coupling of arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a restraint device uses a fixed distance between bracelets, then the structure is simple, but it cannot adapt to different users or restraint scenarios
Solution Approach 1:
The restraint device incorporates a dynamic adjustment mechanism that allows the distance between bracelets to be changed from fixed to adjustable. The bar can pivot between engaged and disengaged positions, enabling the structure to adapt its configuration based on operational requirements while maintaining relative structural simplicity through controlled movement rather than complex multi-component systems.
Solution Approach 2:
The restraint device achieves versatility through a multi-functional bar component that serves multiple purposes: it acts as a structural connector, a distance adjustment mechanism, and a locking/disengagement system. This single component performs what would traditionally require multiple separate parts, thereby increasing adaptability without proportionally increasing overall device complexity.
2Adaptability or versatility
If a restraint device uses a rigid connection between bracelets, then the structure is stable, but it cannot convert between 'chain style' and 'hinge style'
Solution Approach 1:
The bar is designed to pivot between different positions, enabling the restraint device to dynamically switch between 'chain style' (disengaged, more flexible) and 'hinge style' (engaged, more stable) configurations. This dynamic capability allows style conversion while maintaining structural integrity through controlled pivoting motion rather than requiring completely separate structural systems.
Solution Approach 2:
The engagement and disengagement mechanism is designed to be self-regulating through the interaction of teeth and depression geometry. The bar's pivotal movement naturally facilitates engagement of teeth during normal operation and enables disengagement when needed, reducing the need for additional locking mechanisms or complex control systems while maintaining both style conversion capability and structural stability.
3Reliability
If a restraint device uses a tight engagement mechanism, then the restraint is secure, but it causes overtightening during use
Solution Approach 1:
The restraint device incorporates a preliminary anti-action mechanism through the spring-loaded bar system. The spring pre-loads the bar to maintain engagement of teeth for secure restraint, while simultaneously providing a counteracting force that prevents excessive tightening. This dual-action system ensures reliable restraint security while actively counteracting the harmful effect of overtightening before it can occur.
Solution Approach 2:
The spring mechanism provides continuous feedback through its elastic deformation as the bar engages and disengages teeth. When overtightening begins to occur, the spring compresses and generates a counterforce that feeds back to the bar, automatically adjusting the engagement pressure to prevent excessive force while maintaining secure restraint. This passive feedback system ensures both reliability and protection against harmful overtightening.
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
Enables adjustable distance between bracelets, secure engagement and disengagement, and prevents overtightening, providing a versatile and ergonomic restraint solution.
Implementation Method 1
a first spring housed within the housing, wherein the first spring engages the first bar and the second bar
Implementation Method 2
a pivot housed within the housing such that the pivot rotates between a third position and a fourth position
Implementation Method 3
an arm coupled to the housing pivotally
Data Source
AI summary
This disclosure discloses a restraint device including a pair of bracelets that are adjustable in distance therebetween, while at least one of the bracelets can be dually engaged during a restraint and dually disengaged not during the restraint. Further, this disclosure discloses a sleeve to enable a restraint device to be converted from a “chain style” into a “hinge style” and vice versa. Additionally, this disclosure discloses a restraint device including a first arm and a second arm, where the second arm is elastically coupled to the first arm in order to avoid overtightening when restraining.