Dual-Entry Keyring With Two-Turn Lever Mechanism
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Solution Overview
Problem
Conventional keyrings are often stiff, making it cumbersome to attach and detach keys, and may break when attempting to open them, while existing solutions are either complex or inconvenient to use.
Innovation Solution
A dual-entry keyring with a two-turn ring shape design featuring first and second press portions that utilize a lever principle to allow easy key attachment and rotation by 180°, using stress points to facilitate key insertion and retention with reduced effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the keyring is made stiff to maintain structural integrity, then durability is improved, but ease of operation deteriorates as it becomes hard to open and attach keys
Solution Approach 1:
The keyring is divided into a rigid body portion and a flexible opening portion, allowing different sections to have different properties. The rigid body maintains structural integrity while the flexible opening portion enables easy key attachment through bending motion.
Solution Approach 2:
Different parts of the keyring have different mechanical properties: the main body is made rigid for durability, while the opening portion is made flexible for ease of operation. This local differentiation allows each part to optimize its function without compromising the whole.
2Reliability
If the keyring is made stiff to prevent breaking, then reliability is improved, but ease of operation deteriorates requiring more effort to open
Solution Approach 1:
The keyring is segmented into rigid and flexible portions, allowing the rigid body to provide reliability and break resistance while the flexible opening portion reduces the effort needed to open and attach keys.
3Ease of operation
If a complex mechanism is used to enable easy opening, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The keyring utilizes a simple parameter change - bending flexibility in the opening portion - to achieve easy key attachment. This avoids complex mechanisms while maintaining ease of operation through material or structural parameter differentiation.
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 dual-entry keyring design enhances usability and durability by allowing easy key attachment and retention with less effort, while maintaining structural integrity and convenience in use.
Implementation Method 1
utilizes the principle of lever for allowing a key to be easily attached onto one of two opposite ends thereof and then turned into the inside of the ring body of the keyring through 180° angle with less effort
Data Source
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AI summary
A dual-entry keyring includes a ring body (1) in a two-turn ring shape design, defining a first end (11) and a second end (12) respectively disposed at opposing top and bottom sides thereof beyond superimposition and a first press portion (13) and a second press portion arranged between the first end (11) and the second end (12) to face toward each other and respectively outwardly curved so that a gap (15) is defined between the first press portion (13) and the second press portion (14). Further, the part of the first turn of the two-turn ring shape design of the ring body (1) beyond the first press portion (13) is closely abutted to the part of the second turn of the two-turn ring shape design of the ring body (1) beyond the second press portion (14) so that a stress point (16) is formed at each of two opposite lateral sides of the gap (15) between the first press portion (13) and the second press portion (14).