Telescopic Oar With Check Valves For Compact Storage And Bailing
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Solution Overview
Problem
Conventional oars are too long when used as spares, occupy excessive space, and have inconvenient bail openings that hinder water drainage and boat hook operation, with the bail opening often facing the wrong direction and being difficult to control.
Innovation Solution
A multi-function oar design featuring an axially movable oar shaft that can be retracted into the oar blade, incorporating a bail section and boat hook mechanism, allowing for adjustable length, efficient water drainage, and easy operation of the boat hook.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the oar shaft is made long to reach narrow parts of the boat for bailing water, then the bailing function is improved, but the storage space required increases
Solution Approach 1:
The oar shaft is designed with telescopic sections that can extend and retract. When bailing water from narrow parts of the boat, the shaft extends to reach deep areas. When not in use, the shaft retracts to minimize storage space. This dynamic length adjustment resolves the contradiction between needing long reach and requiring compact storage.
Solution Approach 2:
The telescopic oar shaft employs nested tubular sections where inner tubes slide within outer tubes. This nesting structure allows the shaft to compact to a fraction of its extended length for storage, while providing full extended length when needed for bailing water from narrow boat compartments.
2Productivity
If the bail opening is disposed at the bottom end of the oar blade, then the water drainage is improved, but the ability to reach narrow parts of the boat is reduced
Solution Approach 1:
The oar is segmented into modular components including the blade, shaft with telescopic sections, and handle. The blade can be detached or repositioned, allowing the bail opening to be optimally positioned for drainage while the telescopic shaft extends to reach narrow areas. This segmentation resolves the contradiction between drainage efficiency and accessibility.
3Volume of moving object
If the boat hook is installed on the grip of the oar, then the space occupation is reduced, but the control of the oar blade becomes difficult
Solution Approach 1:
The boat hook is mounted on a telescopic extension that can be deployed independently from the grip area. This intermediary structure allows the hook to reach objects while keeping the user's hands on the grip for stable oar blade control, resolving the contradiction between compact integration and operational control.
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
The oar can be shortened for compact storage, facilitates effective water drainage by extending the bail section to reach narrow areas, and allows easy control of the boat hook, addressing the space and operational inefficiencies of conventional oars.
Implementation Method 1
the large-diameter tube being provided with a first check valve facing the bottom end of the tube-connecting portion for controlling water to flow only in a direction from the bottom end toward the large-diameter tube
Implementation Method 2
one end of the small-diameter tube, facing the oar blade, being provided with a second check valve for controlling water to flow only in a direction from the large-diameter tube toward the small-diameter tube
Implementation Method 3
the first check valve having a blocking element to cooperate with the upper positioning portion or the lower positioning portion of the axial hole for positioning the large-diameter tube
Data Source
AI summary
A multi-function oar has an oar blade, a large-diameter tube, and a small-diameter tube. The oar blade has a tube-connecting portion. The tube-connecting portion has a through axial hole. The large-diameter tube is movably inserted in the axial hole. The axial hole has an upper positioning portion and a lower positioning portion for positioning the large-diameter tube, thereby changing the overall length of the oar. The large-diameter tube has a first check valve. The first check valve has a bail opening. The small-diameter tube is provided with a second check valve and an operating member having a water outlet, so as to bail water and drain water.