Air Pump Pressure Gauge Nested Design
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Solution Overview
Problem
Conventional air pump pressure gauges either interfere with the pumping operation or have small view windows, limiting the user's ability to read pressure values conveniently during use.
Innovation Solution
An air pump pressure gauge is designed with a casing that houses the pressure indication system internally, featuring a movable annular member, a spring, seals, and a rotating axle mechanism, allowing pressure readings to be displayed externally without obstructing the pumping process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the analog pressure gauge is attached to the outside of the housing, then the pressure indication is visible, but it interferes with the user's operation in pumping the air pump
Solution Approach 1:
The pressure gauge is nested within the housing structure, specifically utilizing the air valve assembly cavity. The gauge body is positioned inside the housing while the pointer extends through the housing wall to display readings externally, allowing the gauge to be contained within the pump body without interfering with pumping operations.
2Volume of moving object
If a view window type pressure gauge is used with a small tubular passage, then the gauge is compact, but the view window is small, not facilitating viewing of the readings
Solution Approach 1:
The pressure indication is extended into a third dimension by having the pointer protrude outward from the housing wall perpendicular to the housing surface. This allows the reading area to extend beyond the compact gauge body, providing a larger effective viewing area without increasing the gauge's footprint within the pump.
3Volume of moving object
If the pressure gauge is directly connected to the air valve, then the structural size is limited, but the pressure indication is not apparent
Solution Approach 1:
The pointer is extended in the radial direction outward from the housing wall, creating a three-dimensional indication that projects beyond the compact gauge housing. This allows the pressure indication to be apparent and easily visible from a distance while maintaining a compact internal structure connected to the air valve.
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 internal pressure gauge design allows for clear and convenient reading of pressure values without interfering with the pumping operation, providing a large and visible indication of pressure values.
Implementation Method 1
a spring member installed in the annular accommodation space and stopped between one end of the annular accommodation space and the movable member to provide a return force to the movable member
Implementation Method 2
an air hole located on the inner tube between the first airtight structure and the opposite end wall of the annular accommodation space for allowing air to pass from the inner tube into the annular accommodation space to move the movable member
Implementation Method 3
a rack located on the movable member and extending along one side of the longitudinal sliding slot; a rotating axle radially extending through the casing and the annular accommodation space, the rotating axle having an inner end thereof pivotally connected to the inner tube and an outer end thereof extending out of the casing and a middle part thereof fixedly mounted with a gear being meshed with the rack of the movable member
Data Source
AI summary
An air pump pressure gauge includes a casing, an inner tube coaxially affixed to the casing and defining with the casing an accommodation chamber, a movable member movable back and forth in the accommodation chamber, an end cap end cap set between the inner tube and the casing to seal one end of the accommodation space, a spring member stopped between the end cap and the movable member, at least one seal member mounted on the movable member to define a first airtight structure between the outer surface of the inner tube and the at least one seal member and a second airtight structure between the inside wall of the casing and the at least one seal member, an air hole in communication between the axial hole of the inner tube and the accommodation space, a longitudinal sliding slot located on the movable member, a rack extending along one side of the longitudinal sliding slot, a rotating axle inserted through the longitudinal sliding slot and having its inner end pivoted to the inner tube and its outer end extending out of the casing and a middle part thereof mounted with a gear being meshed with the rack, a pointer fixedly connected to the outer end of the rotating axle outside the casing, a graduation scale mounted on the casing below the pointer, and a transparent cover covering the graduation scale and the pointer.