Bracelet Fastening Lock With Retractable Stop for Easy Disassembly
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Solution Overview
Problem
Existing bracelet attachment devices for watches are delicate to assemble, require reliable and secure attachment, and must be dustproof and dirt-proof, yet some solutions make disassembly impossible.
Innovation Solution
A fastening device with a retractable stop and sliding connection, featuring a T-shaped groove and male T-shaped part, allows for quick and easy assembly and disassembly while maintaining security and aesthetics, using a lock with a control button and elastic return element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a permanent assembly solution is used to ensure reliable attachment, then the reliability of the attachment is improved, but the ease of disassembly deteriorates (becomes impossible)
Solution Approach 1:
The stop is designed to be movable between a retracted position (allowing lock insertion/removal) and a raised position (defining locking/unlocking positions). This dynamic element enables the system to transition between assembly and operation states, resolving the contradiction between permanent attachment and easy disassembly.
2Ease of operation
If the sliding opening is left exposed to allow easy access, then the ease of operation is improved, but the accumulation of debris and dirt worsens
Solution Approach 1:
The lock body acts as a flexible cover that can be moved to cover or expose the sliding opening. When the lock is in its normal position, it covers the opening to prevent debris accumulation; when operated, it allows access. This resolves the contradiction between accessibility and contamination prevention.
3Ease of manufacture
If the mounting opening is left open to allow lock installation, then the ease of manufacture is improved, but the aesthetic appearance and dustproofing worsen
Solution Approach 1:
The mounting system is segmented into the terminal body with mounting opening and the lock body that can be inserted to close it. This allows the mounting opening to remain open during assembly (ease of manufacture) while being closed during use (aesthetic appearance and dustproofing).
4Reliability
If the stop is fixed in the raised position to ensure secure locking, then the reliability is improved, but the ease of manufacture worsens (cannot remove lock)
Solution Approach 1:
The stop is designed as a movable element that can be positioned in different states: retracted during assembly/removal operations, and raised during normal operation to define locking positions. This dynamic capability allows the system to be both secure during use and easily serviceable during manufacturing/maintenance.
Data Source
Figure 1~2a
Figure 2b~4
Figure 5~7b
AI summary
The invention relates to a bracelet fastening device, comprising: - a terminal body (10) of the bracelet, - a lock (20) mounted on the terminal body (10), for sliding between: • a locking position, and • an unlocking position, - a stop (40) which can occupy: • a mounted position, in which the stop (40) is fixed on the terminal body (10), and in which the stop (40) is arranged to come into contact with the lock (20) to define one of the locking or unlocking positions, or • a disengaged position, in which the stop (40) is at least partially disassembled from the terminal body (10), so that the lock (20) can be mounted on the terminal body (10).