Hand Grip Temperature Sensor Recess Molding Protection

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The thermistor bonded to the surface of a flexible circuit in hand grips is prone to damage and positional shift during the molding process with synthetic rubber, leading to variations in detected temperature.

Innovation Solution

A recess is formed on the outer peripheral surface of the inner housing to securely fit the temperature sensor, reducing the influence of fluid pressure during molding and preventing damage or unintended shifting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the temperature sensor is bonded to the surface of the flexible circuit, then the temperature sensor can be integrated into the hand grip structure, but the temperature sensor is damaged or shifted during the molding process with synthetic rubber

Engineering Contradiction:

Improveintegration of temperature sensorVSAvoiddamage and positional shift of temperature sensor

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The hand grip structure is divided into distinct functional zones: the flexible circuit board area and the temperature sensor mounting area. The temperature sensor is separated from the flexible circuit bonding process and independently mounted on the inner housing, isolating it from the harmful molding process while maintaining integration within the overall assembly.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The inner housing serves as an intermediary structure that provides a protected mounting location for the temperature sensor. The recess in the inner housing acts as a protective intermediary between the temperature sensor and the molding process, allowing the sensor to be securely positioned without direct exposure to fluid pressure during synthesis rubber molding.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If the temperature sensor is bonded to the flexible circuit surface, then the assembly process is simplified, but the temperature sensor position varies leading to temperature detection variations

Engineering Contradiction:

Improveassembly process simplicityVSAvoidtemperature sensor position accuracy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The recess is pre-formed on the inner housing surface before the temperature sensor is installed. This preliminary structural preparation ensures that when the temperature sensor is mounted, it automatically achieves the correct position and orientation, eliminating position variations without requiring complex assembly procedures or additional positioning fixtures.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If the temperature sensor is exposed during the molding process with synthetic rubber, then the molding process can proceed without additional structural modifications, but the temperature sensor suffers damage from fluid pressure

Engineering Contradiction:

Improvemolding process efficiencyVSAvoidfluid pressure damage to temperature sensor

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The temperature sensor is extracted from the flexible circuit assembly and repositioned to the inner housing surface. This extraction removes the temperature sensor from the harmful molding zone, allowing the synthetic rubber molding process to proceed efficiently without exposing the sensor to damaging fluid pressure, while the sensor remains integrated in the final assembled product.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS10220904B2Hand grip and inner housing of hand grip

Publication Date: 2019.03.05 FALTEC CO LTD

AI summary

To avoid causing significant damage to a temperature sensor or an unintentional shift of the temperature sensor, a hand grip disclosed herein includes: a cylindrical inner housing 110; a heating element 120 provided adjacent to an outer peripheral side of the inner housing 110; a temperature sensor 140 provided adjacent to the outer peripheral side of the inner housing 110; and a sheathing 130 covering the inner housing 110, the heating element 120, and the temperature sensor 140. A recess 111 is formed on an outer peripheral surface of the inner housing 110, and the temperature sensor 140 is fitted into the recess 111.