Platform Screen Door Locking Roller Mechanism
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Solution Overview
Problem
Current locking systems for platform screen doors are complex and require electronic synchronization with motorization, making them less reliable and more expensive.
Innovation Solution
A simple and economical locking system for platform screen door sliding leaves, utilizing a bearing rail with a reception recess and a locking roller that engages when the sliding leaf reaches a specific position, eliminating the need for an electromagnet and directly using the drive motor for locking and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotating hook with cam mechanism is used to lock the sliding leaf, then the locking function is achieved, but the device complexity increases and electronic synchronization with motorization is required
Solution Approach 1:
The patent extracts the locking function from the complex rotating hook-cam mechanism and implements it through a simple roller that engages with a recess in the bearing rail. This eliminates the need for electronic synchronization while maintaining reliable locking functionality.
Solution Approach 2:
The patent replaces the traditional mechanical rotating hook-cam system with a simpler roller-recess mechanism. The roller, mounted on the motor body, engages with a recess in the bearing rail to provide locking, eliminating the need for complex electronic synchronization.
2Ease of operation
If an electromagnet is used for automatic unlocking, then the unlocking function is achieved, but the device complexity and cost increase
Solution Approach 1:
The motor body itself performs the unlocking function by rotating to disengage the roller from the recess in the bearing rail. This self-service mechanism eliminates the need for separate electromagnets or complex unlocking mechanisms, reducing both complexity and cost.
3Reliability
If a complex locking system with multiple parts is used, then the locking function is achieved, but the manufacturing cost and installation difficulty increase
Solution Approach 1:
The locking mechanism is merged with the motor body assembly. The roller is mounted on the motor body, and the bearing rail is integrated with the door structure. This merging reduces the number of separate parts and simplifies both manufacturing and installation while maintaining reliable locking functionality.
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
The solution provides a reliable, cost-effective locking mechanism that reduces the number of parts and simplifies installation, allowing direct motor control of the locking and unlocking process, enhancing operational efficiency.
Implementation Method 1
a locking roller mounted projecting on the motor body and arranged so as to: roll along the bearing rail during a movement of the sliding leaf
Implementation Method 2
engage, by a rotation of the motor body, in the reception recess when the sliding leaf reaches a given position
Data Source
AI summary
A system for locking a platform screen door leaf, the leaf being capable of moving by a horizontal translational movement in a plane of the leaf between open and closed positions, includinga bearing rail mounted on the leaf and having a reception recess,a motor body forming the stator of a drive motor of the leaf and mounted freely in rotation about a motor axis on a gear unit,a locking roller mounted projecting on the motor body and arranged so as toroll along the bearing rail during a movement of the leaf, andengage, by a rotation of the motor body, in the reception recess when the leaf reaches the closed position or the open position, in order to lock.