Robot Hand Fingertip Structure With Detachable Elastic Pad Fixing

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Solution Overview

Problem

Existing robot hand fingertip structures face issues with elastic bodies falling off due to gripping loads and are difficult to replace independently from the claw portion.

Innovation Solution

A fingertip structure featuring a cavity on the ventral side of the elastic body, an embedded member, and a detachable fixing member attached to the finger body, allowing for easy replacement and fixation of the elastic body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the bag-shaped member is firmly attached to the claw portion to lift a heavy workpiece, then the gripping reliability is improved, but the ease of replacement of the elastic body deteriorates

Engineering Contradiction:

Improvegripping reliabilityVSAvoidease of replacement of elastic body

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The elastic body is divided into a fingertip portion and a finger root portion, with the embedded member positioned at the boundary. The fixing member attaches to the embedded member, creating a segmented structure that allows the elastic body to be replaced independently from the claw portion while maintaining firm attachment during gripping operations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The embedded member acts as an intermediary component between the elastic body and the fixing member. This intermediary structure enables detachable attachment of the fixing member to the embedded member, facilitating easy replacement of the elastic body while ensuring reliable transmission of gripping forces during operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If the elastic body is firmly attached to prevent falling off during gripping, then the stability of the elastic body is improved, but the ease of operation for replacement deteriorates

Engineering Contradiction:

Improvestability of elastic bodyVSAvoidease of replacement of elastic body

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The attachment structure transitions from a static permanent attachment to a dynamic detachable attachment. The fixing member can be detached from the embedded member when replacement is needed, and reattached to provide stable attachment during gripping operations, adapting the attachment state to operational requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The elastic body is segmented with the embedded member positioned at the boundary between fingertip and finger root portions. This segmentation allows the fixing member to attach at the embedded member location, providing stable attachment during use while enabling easy detachment and replacement when needed.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20260077512A1Fingertip structure of robot hand, fingertip component of robot hand, and robot hand

Publication Date: 2026.03.19 BRIDGESTONE CORP

AI summary

A fingertip structure of a robot hand includes an elastic body configuring a fingertip portion of the robot hand and having a cavity on a ventral side of a finger, an embedded member embedded in a portion of the elastic body at an opposite side from the cavity, and a fixing member attached to a finger body of the robot hand, detachably attached to the embedded member, and fixing the elastic body to the finger body.