Bubble Level Mount With Disc Spring for Vibration-Stable Balance Leveling

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Solution Overview

Problem

Existing attaching mechanisms for levels on balances are prone to displacement due to impact and vibration, particularly in the vertical direction, leading to changes in horizontal state, which is problematic for precise weighing applications.

Innovation Solution

An attaching mechanism for a level on a balance that includes a bubble chamber, a fixation base with a convex support portion, a ring-shaped elastic body, and rotating members, allowing for horizontal readjustment and absorption of vertical impacts and vibrations through the elastic body, maintaining horizontality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive is used to attach the bubble-type level to the balance, then the level can be fixed on the balance, but the adhesive may deteriorate over time causing the level to detach

Engineering Contradiction:

Improveattachment reliabilityVSAvoidadhesive service life

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The attachment mechanism is divided into two separate components: a pressing member that applies mechanical pressure and a separate attaching member that provides the bonding interface. This segmentation allows the pressing member to be removable and replaceable, avoiding the limitations of adhesive-only solutions while maintaining reliable attachment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A pressing member is introduced as an intermediary component between the bubble-type level and the balance. This pressing member transfers and distributes the pressing force uniformly across the adhesive bonding surface, ensuring optimal adhesive performance and preventing detachment without requiring the adhesive alone to bear the full mechanical load.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a pressing member is added to apply pressing force to the bubble-type level, then the level can be securely attached, but the structure becomes more complex

Engineering Contradiction:

Improveattachment securityVSAvoidattachment structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The pressing member is integrated with the balance structure such that it forms a unified assembly. The pressing member is positioned to work in conjunction with the balance body, combining the functions of structural support and attachment pressure application into a single integrated component rather than requiring separate independent mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pressing member serves multiple functions: it applies uniform pressing force to the adhesive bonding surface, maintains the bubble-type level in proper position, and can be designed to facilitate easy installation and removal. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in overall structural complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If the bubble-type level is attached directly to the balance without a pressing member, then the structure remains simple, but the level may detach due to insufficient pressing force

Engineering Contradiction:

Improveattachment structure simplicityVSAvoidattachment reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

4Reliability

If adhesive is applied to bond the bubble-type level, then the level can be attached to the balance, but improper adhesive application can cause malfunction

Engineering Contradiction:

Improveattachment reliabilityVSAvoidadhesive application precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The pressing member is designed to compensate for variations in adhesive application quality. By providing uniform mechanical pressure across the bonding surface, the pressing member ensures reliable attachment even when adhesive application is not perfectly precise, thereby cushioning against the effects of manufacturing variability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentEP4495545B1Attachment mechanism for bubble-type level in balance

Publication Date: 2026.05.06 A&D CO LTD

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AI summary

Provided is a mechanism for attaching a bubble level to a balance, configured to enable horizontal readjustment of the level after the level is attached, and even when an impact and vibration are applied to the balance after the horizontal adjustment, can prevent a portion of the level from being more greatly displaced in the vertical direction than the other portion, thereby maintaining the horizontality. A level (11) having a bubble chamber formed of a container (14) containing a bubble sealed together with liquid is supported on a convex support portion (33) of a fixation base (31) provided on the balance to be tiltable in all directions via a ring-shaped disc spring (41), and is attached such that the tilt of the level (11) is adjustable by a plurality of male screws (42a) that are displaceable in axial directions according to a rotation direction and a rotation amount for adjusting the tilt of the level (11) .