Electronic Cymbal Frame Case Attachment

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Solution Overview

Problem

Existing electronic cymbals experience non-uniform vibration propagation and biased hit sensitivity distribution when a case is attached, due to stress concentration around screw holes.

Innovation Solution

An electronic cymbal design featuring a frame with a disc-shape and a case attachment method where the case is fitted into frame-side and case-side attaching sections, eliminating the need for screws and thereby uniformizing hit sensitivity distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the frame is fixed by screws, then the case can be securely attached to protect electronic components, but stress is concentrated around screw holes causing non-uniform vibration propagation and biased hit sensitivity distribution

Engineering Contradiction:

Improvecase attachment securityVSAvoidhit sensitivity distribution uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The attaching section is divided into multiple engagement points (protrusions and recesses) distributed across the frame and case surfaces. This segmentation allows the attachment force to be distributed across multiple locations rather than concentrated at screw holes, reducing stress concentration while maintaining secure attachment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention extracts and eliminates the screw fastening mechanism from the attachment system. By removing screws and screw holes, the source of stress concentration is completely removed, allowing uniform vibration propagation across the frame while maintaining case security through the protrusion-recess engagement system.

Inventive Principle:

Principle #2Taking out (Extraction)

2Strength

If screws are used to attach the case, then the attachment strength is sufficient, but the vibration propagation in the frame becomes non-uniform

Engineering Contradiction:

Improveattachment strengthVSAvoidvibration propagation uniformity

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The attachment interface is segmented into multiple protrusions and recesses that distribute attachment forces across multiple contact points. This segmentation provides sufficient cumulative attachment strength while preventing localized stress concentration that would disrupt vibration propagation patterns.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The screw fastening mechanism is completely extracted from the system. This removal eliminates the harmful effect of stress concentration around screw holes while the protrusion-recess engagement system maintains adequate attachment strength through distributed contact forces.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12277920B2Electronic cymbal and case attachment method

Publication Date: 2025.04.15 ROLAND CORP

AI summary

Provided are an electronic cymbal and a case attachment method with which even when a case is attached to a frame, the distribution of hit sensitivity against a hit on the frame is uniform. In this electronic cymbal (1), the case (8) is attached to the frame (4) by fitting an outer peripheral hooking section (8b) of a case (8) into an outer peripheral support section (4b) of a frame (4), and fitting an inner peripheral enclosing section (8d) of the case (8) into the inner peripheral side of the frame (4). These components can be mounted without forming a screw hole in the frame (4) and screwing the case (8) and the frame (4). Thus, it is possible to suppress the stress concentration on a specific position of the frame (4) due to the screwing, and to uniformize the distribution of the hit sensitivity on the frame (4).