Ultrasonic Sensor Mount With Vibration-Proof Rubber Isolation

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Solution Overview

Problem

Conventional ultrasonic sensors attached to vehicle bumpers experience significant vibration transmission, leading to false detections due to inadequate vibration suppression mechanisms.

Innovation Solution

The ultrasonic sensor configuration includes a tubular housing component inserted into a through-hole of the vehicle body component, with a vibration-proof rubber interposed between the housing and the vehicle body, featuring three or more insertion sections around the center axis to minimize vibration transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional ultrasonic sensor is attached to a bumper using a retainer and bezel, then the sensor can be fixed to the vehicle body component, but vibration transmission occurs leading to false detections

Engineering Contradiction:

Improvedetection accuracyVSAvoidvibration transmission

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a vibration-proof rubber as an intermediary component between the housing component and the vehicle body component. This rubber member with insertion sections acts as a mediator that absorbs and dampens vibrations, preventing them from reaching the sensor while still allowing the sensor to be securely attached to the bumper.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical parameters of the attachment system by using an elastic rubber material with specific vibration-dampening properties instead of rigid fastening components alone. The insertion sections of the rubber are designed to deform elastically, changing the mechanical characteristics of the connection between the housing and vehicle body to reduce vibration transmission.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If the housing component is securely fixed to the vehicle body, then attachment stability is improved, but vibration transmission increases causing false detections

Engineering Contradiction:

Improveattachment stabilityVSAvoidvibration transmission

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent employs a flexible rubber member with insertion sections that can deform elastically. This flexible component maintains secure attachment stability while simultaneously absorbing vibrations through its elastic deformation, preventing rigid vibration transmission paths that would occur with purely rigid fastening structures.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The attachment system combines different materials with complementary properties: the rigid housing component for structural integrity, the elastic vibration-proof rubber for vibration dampening, and the retainer for mechanical fastening. This composite approach achieves both stable attachment and vibration isolation.

Inventive Principle:

Principle #40Composite materials

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 effectively suppresses vibration transmission between the sensor and the vehicle body, reducing false detections and enhancing the accuracy of object detection.

Implementation Method 1

a vibration-proof rubber that, as a result of being attached to the housing component, is interposed between the housing component and the vehicle body component in an attached state

Methodology Applied

Scientific EffectVibration suppression: Damping

Implementation Method 2

the vibration-proof rubber has three or more insertion sections that, in the attached state, as a result of being inserted through the through-hole, are held between an inner edge of the through-hole and the housing component

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250341637A1Ultrasonic sensor

Publication Date: 2025.11.06 DENSO CORP

AI summary

An ultrasonic sensor configured to be attached to a plate-shaped vehicle body component is provided with a tubular housing component that is inserted into a through-hole formed in the vehicle body component, and a vibration-proof rubber that, as a result of being attached to the housing component, is interposed between the housing component and the vehicle body component in an attached state, in which the housing component is attached to the vehicle body component. The vibration-proof rubber has three or more insertion sections that, in the attached state, as a result of being inserted through the through-hole, are held between an inner edge of the through-hole and the housing component in a radial direction that intersects a center axis line of the housing component, and the three or more insertion sections are arranged so as to surround the center axis line.