Rotating Game Call Device Reed Adjustment Mechanism
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Solution Overview
Problem
Existing grunt tubes face difficulties in accessibility and consistency of sound production due to the positioning of the o-ring within the device, which can hinder the reed's vibration and require periodic lubrication.
Innovation Solution
The design includes a rotatable housing with a helical engagement member that allows the adjustment of the reed's vibrational characteristics by moving the adjustment member along the length of the reed, and an expandable member that modifies sound direction and pitch, with a biasing mechanism to retract when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the o-ring is positioned inside the central housing to adjust sound, then sound variation is achieved, but user accessibility to the adjustment mechanism is reduced
Solution Approach 1:
The housing is divided into a central housing portion and an adjustable housing portion that can be rotated relative to each other. This segmentation allows the adjustment mechanism to be accessed externally through the adjustable housing portion while the o-ring remains positioned inside to maintain its function, thus resolving the contradiction between sound variation capability and user accessibility.
2Adaptability or versatility
If the o-ring is used to contact the reed for sound adjustment, then pitch variation is achieved, but the o-ring requires periodic lubrication to prevent drying out
Solution Approach 1:
The o-ring is extracted from the reed contact function and replaced with an adjustment member that has an adjustment arm which contacts the reed. The o-ring is retained only for sealing purposes in the adjustable housing portion, eliminating its need for lubrication while maintaining pitch variation capability through the adjustment member's frictional contact with the reed.
3Adaptability or versatility
If the adjustment member is positioned inside the central housing, then sound adjustment is achieved, but the adjustment mechanism becomes difficult for the user to access
Solution Approach 1:
The adjustment mechanism is moved from a purely internal axial position to a combination of radial and axial positions. The adjustable housing portion provides radial access to the adjustment member while maintaining its axial positioning function, allowing users to access and adjust the sound characteristics from the outside of the device.
4Adaptability or versatility
If the o-ring is used to contact the reed, then sound modification is achieved, but the contact may not be consistent around the circumference of the reed which can distort the sound
Solution Approach 1:
Instead of using a circular o-ring that contacts the reed circumferentially, the invention uses an adjustment member with an adjustment arm that contacts the reed at a specific point. This inverts the contact approach from distributed circumferential contact to concentrated point contact, providing more consistent and controllable sound modification without the distortion issues of incomplete o-ring contact.
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 design enhances user accessibility and sound quality by allowing precise adjustment of sound pitch, intensity, and direction, reducing maintenance needs and improving overall performance.
Implementation Method 1
A reed is disposed within the opening and is adapted to vibrate in response to passing air
Implementation Method 2
The helical member acts as an auger to move the adjustment member along the length of the reed as the second housing portion is rotated relative to the first housing portion
Implementation Method 3
The adjustment member includes an adjustment arm in frictional engagement with the reed
Implementation Method 4
The expandable member is biased in its first position so that it retracts inside the housing when the user no longer exerts a pulling force on the outlet end
Data Source
AI summary
An animal call which generally includes a housing having a first portion rotatably combined with a second portion. An opening is formed in a wall of the housing between a mouthpiece and an outlet end. A reed is disposed within the opening and is adapted to vibrate in response to passing air. The reed is combined with the first housing portion. A helical member is formed inside the second housing portion. An adjustment member has a helical engagement member that engages the helical member. The adjustment member includes an adjustment arm in frictional engagement with the reed. The helical member acts as an auger to move the adjustment member along the length of the reed as the second housing portion is rotated relative to the first housing portion.