Sliding Door System with Electromagnetic Repulsion
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Solution Overview
Problem
Users face difficulty in opening and closing side sliding doors in vehicles due to the high pulling force required, especially on inclined roads, as existing technologies do not effectively reduce the effort needed to manage the weight of the door.
Innovation Solution
A sliding door system utilizing a combination of a permanent magnet and an electromagnet, along with a simple electric circuit comprising two serially connected switches, a relay, and a power supply, which reduces the user's exerted force by repelling the permanent magnet with the electromagnet when the door is fully open, allowing the door to be closed with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the door is opened by pulling the door handle, then the door can be opened, but large pulling-repelling force is required due to the weight of the door
Solution Approach 1:
The patent applies the anti-weight principle by using a permanent magnet mounted on the door that interacts with an electromagnet on the vehicle body. When the door is pulled open, the electromagnet is activated to repel the permanent magnet, creating an upward force that counteracts the downward gravitational force on the door. This significantly reduces the pulling force required by the user, especially on inclined roads.
2Speed
If an eddy current brake system is used, then the sliding door can be closed slowly, but there is no application for decreasing the force used for pulling the sliding door
Solution Approach 1:
The patent uses electromagnetic repulsion between a permanent magnet on the door and an electromagnet on the vehicle body to create an upward force that counteracts the door's weight during opening. This directly addresses the ease of operation by reducing the pulling force required, unlike eddy current brake systems that only control closing speed.
3Extent of automation
If electronic control cards and sensors are used, then the door can be controlled automatically, but the system becomes complex and prone to failure in bad weather conditions
Solution Approach 1:
The patent employs a simple electric circuit with two serially connected switches that are directly connected to the position of the door handle. The circuit includes a relay, electromagnet, and permanent magnet, enabling automatic operation without requiring complex electronic control cards or sensors. This self-service approach eliminates components that are prone to failure in bad weather conditions while maintaining ease of operation.
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 system significantly decreases the energy required from the user to open and close sliding doors, eliminating the need for electronic control cards, sensors, and hook systems, making it simpler and cost-effective while functioning in various weather conditions.
Implementation Method 1
A sliding door system utilizing a combination of a permanent magnet and an electromagnet, along with a simple electric circuit comprising two serially connected switches, a relay, and a power supply, which reduces the user's exerted force by repelling the permanent magnet with the electromagnet when the door is fully open
Data Source
Figure 1
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AI summary
The present invention relates to a sliding door system comprising at least one sliding door (1) which enables access inside and outside the vehicle, at least one permanent magnet (2) which enables to give pushing and pulling force to the sliding door (1), at least one door handle (8) which enables the sliding door to be closed by the user, and also comprising at least one electromagnet (3) which corresponds to the permanent magnet (2), enables to give first pushing force in order to close the sliding door (1) by pushing the permanent magnet, and allows the door remaining fixed in fully open position safely upon its core is pulled by the permanent magnet (2), at least one relay (4) which enables the electromagnet (3) to be operated, at least one power supply (5) which is connected to the relay (4), at least one primary switch (6) which can be opened and closed according to the position of the sliding door (1), at least one secondary switch (7) which can be opened and closed depending on the door handle (8) being pulled or not, at least one door handle (8) which enables the sliding door (1) to be opened and closed by the user, and allows the current passing through the secondary switch (7) by being closed when it is pulled.