Lock Device Simplified Structure and Sound Damping
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Solution Overview
Problem
Conventional lock devices have a complex structure with many parts, leading to high manufacturing costs and generate a return tapping sound when the operating member is returned to its initial state, which is not effectively mitigated by existing countermeasures.
Innovation Solution
A lock device with a simplified structure using a housing, two rods, an operating member, a torsion coil spring as a connection member, and a coil spring as an urging member to reduce the number of parts and minimize the return tapping sound by providing swaying resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cam members are mounted on rods to synchronize rod movement, then the locking mechanism functions properly, but the number of parts increases to ten components and manufacturing cost increases
Solution Approach 1:
The cam members are integrated into the operating member as a unified structure. The operating member includes cam surfaces that directly interact with the rods, eliminating the need for separate cam member components. This merging reduces the total part count while maintaining the synchronous movement function through the cam mechanism.
Solution Approach 2:
The operating member is designed to perform multiple functions: it directly acts as the user interface for operation, incorporates the cam mechanism for synchronized rod movement, and integrates the linkage structure for force transmission. This multi-functionality consolidates what would otherwise be separate components into a single universal element.
2Device complexity
If the operating member is returned to initial state without resistance, then the structure remains simple, but a return tapping sound is generated reducing quality
Solution Approach 1:
A damping element is introduced as an intermediary component between the operating member and the rod. This element mediates the return motion by providing controlled resistance that absorbs the impact energy, thereby suppressing the tapping sound while maintaining overall structural simplicity. The damping element acts as a buffer that softens the return action without complicating the main mechanism.
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 solution reduces the number of components, lowers manufacturing costs, and effectively dampens the return tapping sound, improving the overall quality and reliability of the lock device.
Implementation Method 1
two coil springs 5 disposed in the respective cylindrical portions 6 and respectively urging the corresponding rods 3 in a separating direction
Implementation Method 2
two cam members 4 connected on base end sides of the respective rods 3, and urging the rods to move forward and backward
Implementation Method 3
an urging member disposed between the housing and the operating member, and serving as a swaying resistance of the operating member when the operating member is switched from the operating state to the initial state
Data Source
AI summary
A lock device includes a housing; a pair of rods disposed slidably in a linear direction relative to the housing, and switched between a lock position separated from each other, and a release position approaching each other; and an operating member allowing the rods to be switched from the lock position to the release position by changing from an initial state to an operating state. The lock device engages/disengages opening/closing members with/from a main member through the rods, and is formed by the housing, the rod, the operating member, a connection member urging the rods in a connected state in a direction of separating the rods from each other, and an urging member disposed between the housing and the operating member and serving as a swaying resistance of the operating member when switched from the operating state to the initial state through an urging force of the connection member.