Two-Piece Owl Head Assembly for Motorized Scarecrow Rotation
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Solution Overview
Problem
Existing scarecrow devices with movable heads lack efficient assembly processes and realistic motion-sensing capabilities, limiting their effectiveness in mimicking live owl movements.
Innovation Solution
A motorized two-piece head scarecrow design with a rotatable motor shaft, motion sensor, and electronic circuit that rotates the head relative to the body when motion is sensed, mimicking owl movements for enhanced realism and effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a motorized movable head is added to the scarecrow to mimic owl movements, then the realism and effectiveness of the scarecrow is improved, but the device complexity and assembly difficulty increases
Solution Approach 1:
The head is divided into two separate molded portions (front face portion and rear head portion) that are assembled together. The mounting insert is separately formed and then installed into the head assembly. This segmentation allows each component to be manufactured independently with optimized mold designs and simplifies the overall assembly process by enabling modular construction.
Solution Approach 2:
A mounting insert serves as an intermediary component between the motor assembly and the head. The mounting insert includes a motor shaft receiver that interfaces with the motor shaft, and it is received by receivers in both the front and rear head portions. This intermediary element simplifies the connection process and provides a standardized interface for assembling the motorized head system.
2Ease of manufacture
If a two-piece head design with separate receivers is used, then the assembly process is simplified, but the manufacturing precision requirements for each portion increases
Solution Approach 1:
The head is segmented into two portions with integrated receivers that are formed as part of the molding process. This allows each receiver to be precisely positioned within its respective portion during mold design, while the overall assembly tolerance is distributed across the joint between portions rather than requiring extreme precision in a single-piece construction.
Solution Approach 2:
The receivers are merged with the head portions as integrated features rather than separate components. The front receiver and rear receiver are formed as integral parts of their respective molded portions, eliminating the need for separate machining or attachment operations and reducing cumulative tolerance issues that would arise from multiple discrete components.
Data Source
AI summary
A scarecrow includes a scarecrow body corresponding generally in shape to a body of a live animal and an assembled hollow scarecrow head of molded plastic construction corresponding in shape to a head of the live animal. The assembled head includes a front face portion and a separate rear head portion fixed together to form the head, the front face portion having a front receiver and the rear head portion having a rear receiver. The scarecrow includes a motor having a rotatable motor shaft; a mounting insert fixed to the motor with the motor shaft extending below the mounting insert, the mounting insert received by the front receiver and the rear receiver to fix the mounting insert to the head; and a mounting bracket fixed to the scarecrow body and having a motor shaft receiver into which the rotatable motor shaft is received. Rotation of the motor shaft rotates the assembled scarecrow head relative to the scarecrow body.