Coaxial Coil Antenna in Engine Start Stop Switch

Solution Overview

Problem

Existing engine starting/stopping switch devices have restricted operability and increased size due to the disposition of the coil antenna surrounding the push button, which limits the degree of freedom in the push button's shape and size, and requires external support for the antenna.

Innovation Solution

The coil antenna is disposed coaxially with the push button, with at least part of it inserted into the push button, and a circuit board is positioned parallel to the direction of movement, reducing the radial size and enhancing operability by eliminating the need for external support.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the coil antenna is disposed surrounding the push button, then the antenna can be supported externally, but the degree of freedom in the push button's outer diameter and shape is restricted and the device size in the radial direction increases

Engineering Contradiction:

Improvedegree of freedom in push button shape and sizeVSAvoiddevice size in radial direction

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The coil antenna is inserted into the hollow interior space of the push button, with the antenna axis coinciding with the push button axis. This nesting arrangement allows the antenna to be housed within the push button structure itself, eliminating the need for external support members and thereby reducing the device size in the radial direction while providing freedom to design the push button's outer diameter and shape without constraints from external antenna support structures.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of operation

If the coil antenna is disposed surrounding the push button, then the antenna can be supported externally, but the operability of the push button is restricted

Engineering Contradiction:

Improvepush button operabilityVSAvoidpush button shape freedom

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The coil antenna is inserted into the hollow interior space of the push button, with the antenna axis coinciding with the push button axis. This nesting arrangement allows the antenna to be housed within the push button structure itself, eliminating the need for external support members and thereby reducing the device size in the radial direction while providing freedom to design the push button's outer diameter and shape without constraints from external antenna support structures.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If a member for supporting the coil antenna is disposed on the outside of the push button, then the antenna can be supported, but the switch device increases in size in the radial direction

Engineering Contradiction:

Improveantenna support stabilityVSAvoiddevice size in radial direction

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The coil antenna is inserted into the hollow interior space of the push button, with the antenna axis coinciding with the push button axis. This nesting arrangement allows the antenna to be housed within the push button structure itself, eliminating the need for external support members and thereby reducing the device size in the radial direction while providing freedom to design the push button's outer diameter and shape without constraints from external antenna support structures.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The push button structure is designed to inherently support the coil antenna by providing a hollow interior space that houses the antenna. The push button body itself becomes the support structure, merging the antenna support function with the push button structure, thereby eliminating the need for separate external support members and reducing the overall device size.

Inventive Principle:

Principle #5Merging (Combining)

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 increases the degree of freedom in the push button's shape and size, improves operability, and reduces the overall size of the switch device, allowing for more compact mounting in vehicles.

Implementation Method 1

a coil antenna that outputs transponder drive radio waves for generating an electromotive force in a transponder built into a portable device

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS8810363B2Engine starting/stopping switch device

Publication Date: 2014.08.19 MINEBEA ACCESSSOLUTIONS INC

AI summary

An engine starting/stopping switch device is provided that includes a switch unit that switches over switching modes in response to linear movement of a movable member, a push button that is linked to the movable member so as to drive the movable member in response to a pushing operation, and a coil antenna that outputs transponder drive radio waves for generating an electromotive force in a transponder built into a portable device, wherein the coil antenna (15) is disposed coaxially with the push button (14) so that at least part of the coil antenna (15) is inserted into the interior of the push button (14). This enables the operability of a push button to be improved and enables the size in the radial direction of the push button to be reduced.