Compact Espagnolette Lock with Nested Blocking Element
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Solution Overview
Problem
Existing espagnolette switching locks require large installation spaces and weaken the corner reinforcement of tubular frame doors, making them difficult to install and compromising the structural integrity of the door.
Innovation Solution
A compact espagnolette switching lock design where the activated blocking element dips into a recess of the drive bolt, utilizing a compression spring to reset the button independently, allowing for a symmetrical button shape and U-shaped lock housing to minimize space requirements and facilitate easy adjustment and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If a conventional rectangular box lock housing is used, then the espagnolette and switching latch can be accommodated, but the installation space required is large and weakens the corner reinforcement of tubular frame doors
Solution Approach 1:
The blocking element and button are merged into a single integrated component rather than separate parts. This integration eliminates the need for additional spacing between components, significantly reducing the overall installation space required in the lock housing while maintaining all necessary functions.
Solution Approach 2:
The blocking element is designed to nest within the recess of the drive bolt when activated, with the button serving as both the actuating mechanism and part of the blocking structure. This nested arrangement minimizes the space occupied by moving parts and allows compact installation in the corner region of tubular frame doors without compromising corner reinforcement.
2Ease of manufacture
If the blocking element and button are separate components, then each can be optimized independently, but the installation space increases and requires larger recesses
Solution Approach 1:
The blocking element and button are combined into a single integrated component manufactured as one piece. This merger eliminates the need for separate manufacturing optimization while dramatically reducing installation space requirements, as the combined component occupies significantly less volume than two separate components would require.
3Ease of operation
If the button is asymmetrical to achieve reset function, then the reset mechanism works, but the lock cannot be used on both left and right pivoting wings
Solution Approach 1:
The button is designed with asymmetrical pressing surfaces where one side has a larger pressing surface than the other. This asymmetry enables the reset function to work in a single direction while the entire lock assembly can be mounted on either left or right pivoting wings, achieving versatility through symmetrical mounting capability rather than symmetrical button design.
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
Enables safe and reliable release of the espagnolette with minimal installation space, maintaining the structural integrity of tubular frame doors and allowing for easy adjustment and use on both left and right pivoting wings.
Implementation Method 1
only the compression spring (18) urging the blocking element (15) into the activated position (3) serves to reset the button (19) via the surfaces (20, 35)
Data Source
Figure 1
Figure 2a~2b
Figure 3~5
AI summary
The lock (10) has a locking element which holds the driving latch (7) in retracted position, and a releasing unit releases the driving latch secured to locking element. The locking element is provided into recess of driving latch. A power storage device is displaceably mounted transverse to traveling direction of driving latch and is sliding supported in activated position by which force is acted upon. The releasing unit has a forend in traveling direction of driving latch for managing the button. The locking element is inclined to displacement direction of main surface.