Automatic Cuff Device with Motorized Spiral Winding Mechanism
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Solution Overview
Problem
Current handcuffing devices are ineffective in immobilizing moving offenders for arrest, as they require manual operation and cannot safely encircle a limb in a crowd, posing high risk to police and failing to protect property from vandalism.
Innovation Solution
An automatic handcuff device with a motorized pulley system and clasp composed of linked elements with asymmetrical projections and cables, allowing for spiral winding and secure encirclement of a limb, controlled by an electronic detection system and remote operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual handcuffing is used, then the device is simple to operate, but it requires police officers to engage physically with moving offenders, posing high risk to their safety
Solution Approach 1:
The patent replaces the manual mechanical handcuffing operation with an automated electromechanical system. A motor-driven spool winds a flexible strap to encircle and immobilize the offender's limb, eliminating the need for police officers to physically engage with moving offenders. The system includes a housing, motor, spool, and control unit that work together to perform the handcuffing action automatically.
2Reliability
If a rigid clasp is used to securely immobilize the offender, then the immobilization is effective, but the device cannot adapt to different limb sizes and shapes
Solution Approach 1:
The patent employs a flexible strap instead of a rigid clasp to create the encircling element. The strap can conform to various limb shapes and sizes while maintaining immobilization effectiveness. The flexibility allows the strap to wrap around different anatomical structures, providing both adaptability and secure restraint.
Solution Approach 2:
The system transitions from a static rigid structure to a dynamic flexible system. The flexible strap can be adjusted in length and tension through the motor-driven spool mechanism, allowing the device to adapt to different limb dimensions while maintaining effective immobilization. The dynamic nature of the flexible strap enables it to conform to various shapes.
3Reliability
If the clasp winds tightly to secure the offender, then the immobilization is strong, but the device may cause injury to the offender
Solution Approach 1:
The flexible strap distributes the constriction force over a broader area compared to a rigid clasp, reducing pressure concentration that could cause injury. The flexibility allows the strap to conform to the limb's shape, avoiding sharp edges or pressure points that might damage tissue while maintaining effective immobilization.
Solution Approach 2:
The control unit monitors the winding process and can detect when appropriate tension is achieved. This feedback mechanism allows the system to apply sufficient force for secure immobilization while preventing excessive tension that could cause injury. The automated control provides a degree of precision and safety not achievable with manual operation.
4Reliability
If the handcuff device is made complex with motor and control systems, then it can operate automatically to reduce police risk, but the device complexity increases
Solution Approach 1:
The system is divided into distinct functional modules: a housing containing the motor and spool mechanism, a flexible strap for encirclement, and a control unit for automation. This segmentation allows each component to perform its specific function efficiently while making the overall system more manageable and maintainable despite the added complexity of automatic operation.
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 safe and efficient immobilization of moving offenders, reducing risk to police and protecting property by allowing remote operation and secure encirclement of limbs, while preventing injury through overvoltage detection and anti-return mechanisms.
Implementation Method 1
an electric motor actuating at least one pulley
Implementation Method 2
said projection, acting as a lever, pivots said link and presses on the projection of the adjacent and preceding link, transmitting to it the force of said cable
Implementation Method 3
the pulleys equipped with a disengageable anti-return maintain the tension in the cables and the wound clasp
Data Source
Figure 1~3
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Figure 8~10
AI summary
The invention relates to a device that actuates the clasp of a cuff to immobilise a moving individual. It comprises a housing (1) provided with an electric motor (2) actuating a pulley (3), which winds a cable (4), and a clasp (5) composed of rigid links (6) interconnected by a flexible joint. When the motor (2) is started, it activates the cable (4), which circulates from link to link (6), thus winding the clasp (5) in a spiral and closing the cuff on the limb of the individual to be immobilised. The device according to the invention is intended to be used for protecting material goods and premises - shops, private houses and warehouses - and is intended to be used by the police force.