Bolt Lock Key Retention Mechanism for Proper Bolt Insertion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bolt locks for securing two-wheelers often fail to ensure proper use by authorized users, leading to improper locking and unauthorized access.
Innovation Solution
A bolt lock with a lock cylinder, latch, and blocker mechanism that requires the bolt to be inserted and locked before the key can be removed, ensuring the key is secured in the lock cylinder until the bolt is properly locked, featuring a combination of movable tumblers and a blocker to prevent unauthorized unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the key can be removed from the lock cylinder at any position, then the ease of operation is improved, but the reliability of proper locking is worsened
Solution Approach 1:
The lock cylinder provides tactile feedback through the position-dependent key removal mechanism. The feedback element (latch or blocking element) physically prevents key removal unless the cylinder is in the correct locked position, creating immediate user feedback that confirms proper locking without requiring visual inspection or additional steps.
Solution Approach 2:
The key removal capability transitions from static (always removable) to dynamic (conditionally removable based on cylinder position). The mechanism allows key removal only when the cylinder is in the specific locked position, making the operation dynamic and position-dependent rather than static and unconditional.
2Ease of operation
If the lock cylinder allows key removal in all positions, then the ease of operation is improved, but the device complexity increases due to additional blocking mechanisms
Solution Approach 1:
The key removal control function is merged with the existing locking mechanism components. The latch or blocking element that controls key removal is integrated into the same mechanical system that performs the locking function, eliminating the need for separate independent control mechanisms and reducing overall complexity.
Solution Approach 2:
The latch or blocking element serves multiple functions: it controls key removal, indicates proper locking position, and works in conjunction with the locking mechanism. This multi-functionality reduces the need for additional dedicated components, thereby limiting the increase in device complexity.
3Ease of operation
If the bolt can be removed without locking, then the ease of operation is improved, but the security against unauthorized access is worsened
Solution Approach 1:
The lock cylinder preemptively prevents unauthorized access by making bolt removal impossible unless the bolt is first properly locked. This preliminary action (requiring locking before removal) counteracts the potential harmful effect of unauthorized bolt removal, ensuring security is maintained while allowing convenient removal when properly locked.
Data Source
AI summary
A bolt lock comprises a lock body and a bolt which can be selectively inserted into the lock body and locked to the lock body. The lock body comprises a lock cylinder which can be actuated between an initial position and an actuating position by means of an associated key; a latch which is movable between a locking position and an unlocked position; and a blocker which is movable between a blocking position and a release position. The latch locks the inserted bolt to the lock body in the locking position and releases the inserted bolt for removal from the lock body in the unlocked position. By actuating the lock cylinder into the actuating position, the latch can be moved to the unlocked position. The key is only removable from the lock cylinder in the initial position of the lock cylinder. The blocker blocks the lock cylinder against an actuating movement into the initial position in the blocking position, and releases the lock cylinder for an actuating movement into the initial position in the release position. The bolt inserted into the lock body moves the blocker into the release position.