Push Button Switch Lever Tilting Prevention
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Solution Overview
Problem
Existing push button switch devices with levers suffer from tilting of the operating member during lever operation, leading to unstable ON and OFF switching performance due to uneven distribution of force and friction between movable and fixed contacts.
Innovation Solution
The push button switch device is designed with a movable contact having contact portions distributed on both sides of the operating member, a biasing member positioned on the connecting portion, and guided portions to prevent tilting, ensuring stable contact timing and precise switching by dispersing forces and using a symmetrical movable contact shape for easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the movable contact and fixed contacts are arranged on one side apart from the operating portion, then the switching mechanism can be compactly designed, but the operating member tilts during lever operation causing unstable contact timing
Solution Approach 1:
The patent applies asymmetry by positioning the movable contact and fixed contacts on one side apart from the operating portion, creating an asymmetric layout that enables compact switching mechanism design while maintaining functional effectiveness
Solution Approach 2:
The patent resolves the tilting issue by introducing guide portions that constrain the operating member's movement along a predetermined path, effectively adding a dimensional constraint that prevents unwanted rotational movement while preserving the asymmetric compact layout
2Ease of operation
If frictional force is caused between contact portions and fixed contacts during sliding, then switching action is achieved, but the operating member tilts due to uneven force distribution
Solution Approach 1:
The patent introduces guide portions as intermediary elements that mediate between the frictional contact forces and the operating member's movement, channeling the forces along a controlled path that maintains stability while preserving switching effectiveness
Solution Approach 2:
The patent employs dynamic constraints through the guide portions that adapt to the lever's rotation, allowing the operating member to move freely along the intended path while dynamically preventing tilting during the switching 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
This configuration prevents tilting of the operating member, stabilizes the contact timing, and enhances the precision and reliability of ON and OFF switching performance.
Implementation Method 1
a movable contact held by the operating member, having at least a pair of elastic arms, and contact portions respectively formed in the elastic arms to sandwich the fixed contacts
Implementation Method 2
a biasing member which biases the operating member toward its initial position
Implementation Method 3
there is a concern that the operating member holding the movable contact is tilted when the lever is press-operated... a frictional force is caused between the three contact portions of the movable contact, and the three fixed contacts
Data Source
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AI summary
A push button switch device with a lever which can prevent occurrence of the tilting of an operating member when a lever is press-operated is provided. The push button switch device includes an operating member 7 having an operating portion 7a to which the pressing force of a lever 3 is to be applied, a movable contact 8 held by the operating member 7 and having a first elastic arm 8a and a second elastic arm 8b, and a first contact portion 8a1 and a second contact portion 8b1 formed in the elastic arms 8a and 8b, respectively, to sandwich a first contact 4, a second contact 5, and a common contact 6. The movable contact 8 has a connecting portion 8c which connects the first elastic arm 8a and the second elastic arm 8b. The first contact portion 8a1 and the second contact portion 8b1 of the movable contact 8 are distributively arranged on both sides of a position corresponding to the operating portion 7a of the operating member 7. A coil spring 9 which biases the operating member 7 is arranged on the bottom surface of the connecting portion 8c of the movable contact 8.