Magnetic Push-Button Switch Sealing via H-Cross Section
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Solution Overview
Problem
Existing push-button switches face sealing issues, especially under harsh conditions, and non-contact switches with resilient members fail to maintain sealing when these members break or tear.
Innovation Solution
A push-button switch design featuring a cylindrically formed body with an integrated intermediate layer and a resilient member between the button and body, along with a magnetic member interacting with the printed circuit board, providing a sealed 'H' type cross-section and eliminating the need for a classical spring for sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used as a resilient member for sealing, then sealing is provided, but cost increases
Solution Approach 1:
The patent extracts and eliminates the spring component from the sealing mechanism. By using the magnetic member to provide both actuation and sealing functions through magnetic coupling, the design removes the need for a separate spring, thereby reducing component count and manufacturing cost while maintaining sealing capability.
Solution Approach 2:
The magnetic member serves multiple functions simultaneously: it provides the actuating force, creates the non-contact coupling, and ensures sealing. This multi-functionality eliminates the need for separate spring and sealing components, reducing overall cost while maintaining all required functions.
2Device complexity
If contacting push-button switches are used, then structural simplicity is maintained, but sealing problems occur under harsh conditions
Solution Approach 1:
The patent replaces the traditional mechanical contacting structure with a non-contact magnetic coupling system. The magnetic member interacts with the printed circuit board through magnetic attraction without physical contact, eliminating the need for holes and contact points while providing superior sealing performance in harsh environments.
Solution Approach 2:
The magnetic field acts as an intermediary between the magnetic member and the printed circuit board, enabling force transmission and sealing without direct mechanical contact. This intermediary magnetic coupling maintains structural simplicity while solving the sealing problem inherent in contacting switches.
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 design ensures long-lasting sealing and durability even if the button or resilient member fails, maintaining operational integrity under harsh conditions without the cost of traditional spring-based solutions.
Implementation Method 1
a magnetic member attached with the button... a printed circuit board positioned in the body... magnetic member is positioned above the intermediate portion
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A push-button switch (10) comprises a body (13); a button (11) at least partially placed into the body (13); a magnetic member (30) attached with the button (11); a resilient member (12) placed between the button (11) and the body (13); and a printed circuit board (15) positioned in the body (13). Said switch further comprises the body (13) having an intermediate portion (40) integrated with the body (13) forming a closed intermediate layer inside the body (13). According to the present invention, said switch is designed to be in an "H" type cross section having the intermediate portion (40) so as to prevent leakage to the printed circuit board (15).