Lift-Up Buckle Movement Device Axis Alignment

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Solution Overview

Problem

Existing buckle movement devices face challenges in suppressing offset between the rotation central axis of a supporting member and the rotation central axis of a rotating member, leading to potential contact noise and mechanical stress.

Innovation Solution

The movement device incorporates a supporting body that rotatably supports the rotating member, with a driving mechanism that includes a rotation supporting body and a restricting body to prevent axial movement and sliding, thereby maintaining alignment and reducing noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a motor and screw joint are used to drive the rotating member, then the moving body can be moved, but offset between the rotation central axis of the supporting member and the rotation central axis of the rotating member occurs

Engineering Contradiction:

Improvemovement capabilityVSAvoidaxis alignment

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

A supporting body is introduced as an intermediary component between the supporting member and the rotating member. The supporting body includes a rotating portion that rotates together with the rotating member and a supporting portion that is supported rotatably relative to the rotating portion, mediating the connection and maintaining axis alignment while enabling movement.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The supporting body is divided into distinct functional segments: a rotating portion that rotates with the rotating member and a supporting portion that provides rotational support. This segmentation allows each part to perform its specific function while maintaining overall axis alignment.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If the supporting member directly supports the rotating member, then the structure is simple, but sliding noise occurs between the supporting member and rotating member

Engineering Contradiction:

Improvestructure simplicityVSAvoidsliding noise

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The supporting body acts as a mediator between the supporting member and rotating member, providing a controlled rotational interface that eliminates direct sliding contact and the associated noise while adding minimal structural complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The direct sliding mechanical contact between the supporting member and rotating member is replaced with a controlled rotational support system using the supporting body, substituting harmful sliding friction with controlled rotational movement.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If the supporting member rotates with the rotating member, then the moving body can be moved, but offset between central axes causes contact noise

Engineering Contradiction:

Improvemovement efficiencyVSAvoidcontact noise

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The supporting body serves as an intermediary that maintains proper alignment between the supporting member and rotating member during rotation, enabling efficient movement while preventing the contact noise that would result from axis offset.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10808811B2Movement device

Publication Date: 2020.10.20 KK TOKAI RIKA DENKI SEISAKUSHO

AI summary

At a lift-up buckle device, due to a motor being driven and an output shaft of the motor being rotated, a drive screw is rotated. Further, a supporting tube rotatably supports a rear end portion of the drive screw. Here, the output shaft rotatably supports a front end portion of the drive screw. Therefore, offset between a rotation central axis of the output shaft and a rotation central axis of the drive screw can be suppressed.