Cam Locking Mechanism for Automatic Door Leaf Operation
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Solution Overview
Problem
Existing locking control devices for doors and windows require user intervention to lock and unlock, making it tedious and potentially impossible for physically impaired individuals, and they do not minimize user intervention during the closing and locking process.
Innovation Solution
A locking control device with cam locking assemblies that allow the control rod and controlled rods to move to their locking positions automatically upon closing, using cam effect mechanisms without actuator intervention, enabling the leaf to close and lock with a simple impulse, reducing user effort and intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control rod is manually operated to lock and unlock the leaf, then the locking operation can be performed reliably, but the user intervention is excessive and the operation becomes tedious
Solution Approach 1:
The cam mechanism is pre-configured with inclined surfaces that automatically convert the closing movement into unlocking action. The cam groove and cam element are designed in advance to guide the control rod and controlled rods to their unlocking positions without user intervention, enabling the leaf to close and lock with a simple impulse
Solution Approach 2:
The locking device uses the closing movement itself as the energy source to trigger the unlocking mechanism. The cam mechanism automatically translates the closing motion into rod displacement, making the system self-actuating during closing without requiring external actuation
2Extent of automation
If the actuator is used to control the control rod movement, then the locking position can be precisely controlled, but the user must manually operate the actuator during closing which increases operational complexity
Solution Approach 1:
The system uses the closing movement itself as the energy source to automatically trigger the unlocking mechanism through the cam action, making the system self-actuating during closing without requiring external actuation or manual intervention
Solution Approach 2:
The cam mechanism is pre-configured to automatically translate closing motion into rod displacement, preparing the locking components in advance to engage automatically at the appropriate moment during closing
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 the leaf to close and lock automatically with minimal user effort, improving accessibility for physically impaired individuals and reducing the operational complexity of locking and unlocking processes.
Implementation Method 1
the bolt and the keeper of at least one of the first and second locking assemblies, called 'cam locking assembly', are able to cooperate by cam effect for, when closing the leaf from its swinging open position, causing unlocking translations of the control rod and of the first controlled rod, without actuation of the actuator
Data Source
Figure 1
Figure 2~2A
Figure 2B~2C
AI summary
The present invention relates to a locking control device (20, 20A, 20B, 20C) for an opening leaf (1) of a frame (10) pivoting about a longitudinal axis (Z1), including a control rod (45) and at least one controlled rod (55) which are capable of being mounted such as to slide respectively in the longitudinal (Z) and lateral (X) direction on the leaf (1), and which are coupled in motion; at least first and second locking assemblies (40, 50) each including a bolt (41, 51) secured to an associated rod (45, 55) and an associated strike (42, 52); at least one actuator (30) for controlling the translation of the control rod (45); and a first return means (70) for urging the movement of said rods (45, 55) into the respective locking positions thereof. The bolt (41, 51) and the strike (42, 52) of at least one of said two locking assemblies (40, 50) are capable of engaging by cam action such that, when the leaf (1) is closed from the hinged open position thereof, unlocking translation movements are applied to the control rod (45) and the first controlled rod (55), without actuating the actuator (30).