Safety Door Handle Bolt Mechanism for Automatic Latching
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Solution Overview
Problem
Current door handle systems require manual rotation to retract or extend the bolt, have different handle orientations in extended and retracted positions, and require adjustments for left and right door installations, leading to user interaction complexities and potential durability issues.
Innovation Solution
A door handle system with a bolt unit featuring a housing, handle, and a bolt module, where a bolt stopper is configured to switch between blocking and release positions, allowing the bolt to engage or disengage with a lock unit automatically upon door closure, using an activation mechanism to ensure the bolt is protected and easily operated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual rotation is required to retract or extend the bolt, then the user has control over bolt position, but the user interaction becomes complex and durability decreases
Solution Approach 1:
The door handle system automatically performs bolt extension and retraction based on door position. The activation means detects when the door is closed and automatically extends the bolt through the activation member, eliminating the need for manual rotation and reducing user interaction complexity while improving reliability through automated protection.
2Ease of operation
If the bolt is exposed outside the housing, then engagement with lock unit is enabled, but the bolt is vulnerable to damage
Solution Approach 1:
The housing with bolt opening is designed to guide and protect the bolt during its movement. The activation means is positioned to engage the activation member at the optimal moment, ensuring the bolt is extended only when needed and retracted before the door opens, preventing damage from premature exposure.
Solution Approach 2:
The activation means acts as an intermediary between the door position and the bolt. It translates door closure into bolt extension through the activation member, providing controlled engagement while the housing structure serves as a protective intermediary that shields the bolt during retraction.
3Adaptability or versatility
If dedicated handle variants are used for left and right door installations, then proper orientation is achieved, but device complexity increases
Solution Approach 1:
The door handle system is designed as a universal mechanism that can be installed on both left and right hinged doors. The activation means and bolt mechanism work bidirectionally, adapting to different door configurations without requiring separate handle variants, thereby reducing device complexity while maintaining installation flexibility.
Solution Approach 2:
The housing and activation means are designed with asymmetric mounting capabilities that automatically adapt to the door's hinge side. The bolt opening and activation member positioning allow the same handle unit to function correctly on both left and right installations through proper mounting orientation, eliminating the need for dedicated left and right variants.
Data Source
AI summary
A door handle system comprises a bolt unit. The bolt unit comprises a housing with a bolt opening, a handle and a bolt module with a bolt. The bolt is moveable respective to the housing. The bolt can be moved out of the bolt opening of the housing for engaging with a corresponding lock opening. The bolt unit comprises a restraining device with a bolt stopper. The bolt stopper is configured to be switched between a blocking position in which it engages with the bolt and a release position in which it releases the bolt thereby allowing the bolt to move out of the bolt opening. An activation member is to switch the bolt from the blocking position into the release position.