Massage Head Insertion Detection Structure for Stable Signal Sensing

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Solution Overview

Problem

Existing massage devices face challenges in accurately identifying the inserted or pulled-out state of massage heads due to sensor displacement and looseness caused by vibration and shaking, leading to inaccurate signal detection and misjudgment.

Innovation Solution

A structure comprising a sliding rod with a notch, a plastic support with symmetrical supporting rods, and a sensor integrated with a printed circuit board assembly (PCBA) that triggers upon proper fastening of the massage head, utilizing a micro switch and photosensitive sensor for precise detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If a sensor and related circuit are mounted on the device to automatically identify massage head state, then the intelligent level and user experience are improved, but the sensor is prone to displacement or looseness due to vibration and shaking, leading to inaccurate signal detection

Engineering Contradiction:

Improveautomatic identification functionVSAvoidsignal detection accuracy

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The sensor is integrated directly into the massage head assembly rather than being a separate mounted component. This merging of the sensor with the massage head ensures that they move together as a single unit, eliminating relative displacement and looseness caused by vibration and shaking, thereby maintaining accurate signal detection throughout device operation

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent replaces traditional mechanical mounting methods with magnetic field-based sensing. The sensor detects the presence or state of the massage head through magnetic field changes rather than relying on mechanical contact or mounting structures, which eliminates the problems of mechanical displacement and loosening while maintaining reliable detection

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Device complexity

If the sensor is mounted on the device body, then the structure is simple, but the sensor experiences displacement or looseness due to external factors such as vibration and shaking

Engineering Contradiction:

Improvesensor mounting structureVSAvoidsignal detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The sensor is combined with the massage head in a single integrated assembly. This eliminates the need for separate mounting structures and reduces overall device complexity while ensuring the sensor maintains its precise position relative to the massage head during operation, thereby preserving measurement precision

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The sensor is pre-positioned and fixed within the massage head assembly during manufacturing. This preliminary positioning ensures that the sensor is correctly located before the assembly is used, eliminating the need for complex adjustable mounting structures on the device body while maintaining detection accuracy

Inventive Principle:

Principle #10Preliminary action

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

Ensures accurate and efficient identification of the massage head's state through mechanical fit and electronic linkage, enhancing signal transmission stability and reducing mechanical wear, thus improving the device's intelligent control.

Implementation Method 1

the sensor includes a micro switch, the micro switch is clamped in the through hole, and an elastic sheet of the micro switch faces the massage head

Methodology Applied

Scientific EffectMechanical contact detection:

Implementation Method 2

the sensor includes a photosensitive sensor, and the photosensitive sensor is attached to the PCBA and is located in the through hole

Methodology Applied

Scientific EffectPhotoelectric detection: Photoelectric Effect

Data Source

PatentUS20260016323A1Structure capable of automatically identifying inserted/pulled-out state of massage head

Publication Date: 2026.01.15 ZHEJIANG RED & BLACK TECH CO LTD

AI summary

A structure capable of automatically identifying an inserted/pulled-out state of a massage head includes a sliding rod, a plastic support and a sensor. The sliding rod is provided with a notch. The plastic support is provided with two positionally symmetrical supporting rods, and the supporting rods fit with the notch. The plastic support is further provided with a mounting portion, the mounting portion is provided with a printed circuit board assembly (PCBA) and a sensor, and the PCBA is in circuit connection with the sensor. When the massage head is fastened to the sliding rod, the sensor is triggered. The sensor and the PCBA are arranged in the plastic support and the plastic support and the sliding rod are positionally limited, so that displacement of the sensor and the PCBA in the plastic support is avoided, and stability of signal detection by the sensor is improved.