Locking mechanism for a cooling chamber door
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Solution Overview
Problem
The existing locking mechanisms for refrigerator doors are ergonomically unfavorable due to the opposite pivoting movement required to release the lock from the outside, which is unergonomic and inefficient compared to the door's opening direction.
Innovation Solution
A locking mechanism where the actuating handle, serving as the external door handle, moves linearly and carries a locking cylinder, with the movement coupling between the pull rod and release element canceled when the pressure handle is actuated, allowing the latch to be released through a linear pulling motion that aligns with the door opening force vector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the latch and striking plate are arranged on the outside of the door, then the door can be locked securely, but the unlocking movement is opposite to the door opening direction which is unergonomic
Solution Approach 1:
The patent inverts the traditional arrangement by placing the latch and striking plate on the inside of the door rather than the outside. This inversion allows the door handle to pull the door open in the same direction as the unlocking movement, eliminating the need for opposite-direction movements and improving ergonomic operation while maintaining secure locking
2Ease of operation
If the door handle is arranged to pivot opposite to the door opening direction, then the latch can be released, but the operation becomes unergonomic and inefficient
Solution Approach 1:
The patent inverts the traditional hinge-side latch arrangement to the opposite side (inside of the door), which aligns the unlocking movement with the door opening direction. This simplifies the movement mechanism by eliminating the need for complex pivot path adjustments and makes operation more efficient and ergonomic
Data Source
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AI summary
Locking device (10) of a cold storage door (11), comprising a latch (21), a strike plate (22) into which the latch (21) engages, a release element (39) by means of which the latch (21) can be released from the strike plate (22), an actuating handle (13) by means of which the release element (39) can be actuated and which also serves as a door handle (13), a retaining block (17) in which the actuating handle (13) is movably mounted and which serves to arrange the actuating handle (13) on a cold storage door (11), and a locking cylinder (29) which locks the actuating handle (13), wherein the actuating handle (13) is mounted in the retaining block (17) in a manner that allows only linear movement and the actuating handle (13) carries the locking cylinder (29).