Lever Press Structure for Bicycle Pump Nozzle Locking
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Solution Overview
Problem
Existing manual air pumps for bicycle tires face difficulties in securely locking the pump nozzle to the air nozzle due to the requirement of excessive force and strength needed to operate the cam knob, making it cumbersome for users to manage the locking and unlocking process.
Innovation Solution
A press structure for the pump head utilizing a lever mechanism with hanging arms, elastic members, and pressing members that allows for easy manipulation by reducing the force required to lock or release the air nozzle, ensuring ergonomic operation and preventing external object contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cam knob locking device is used to secure the pump nozzle to the air nozzle, then the airtight effect is improved and the pump nozzle is prevented from ejecting, but the device volume increases and the operation becomes difficult due to excessive force required
Solution Approach 1:
The invention inverts the conventional locking mechanism by using a lever that moves from an unlocked position to a locked position through pressing motion rather than rotation. The lever's clamping end moves from away from the interface to toward the interface, transforming the locking action into a simpler pressing motion that requires less force and is easier to operate.
Solution Approach 2:
The lever is designed to be movable between different positions (unlocked and locked states). The elastic member provides dynamic restoring force that automatically returns the lever to the locked position after pressing, creating a dynamic system that adapts to the locking requirement without requiring excessive manual force for maintenance.
2Ease of operation
If a cam knob with longer force-applying arm is used to facilitate force application and rotation, then the ease of operation is improved, but the overall device volume increases
Solution Approach 1:
Instead of extending the force-applying arm outward as in conventional cam knobs, the invention inverts the approach by positioning the force-applying end (pressing member) closer to the hinge, allowing force to be applied in a compact space. The lever itself acts as the force multiplier through its rotational movement around the hinge point.
Solution Approach 2:
The invention changes the dimension of force application from radial (rotational) to linear (pressing motion). By allowing the pressing member to move linearly toward and away from the base body, the system achieves mechanical advantage through the lever's angular displacement rather than requiring a long radial arm, thus reducing device volume.
3Strength
If excessive force is required to turn the cam knob for locking or loosening, then the locking strength is improved, but the ease of operation deteriorates
Solution Approach 1:
The elastic member creates a dynamic system where the lever automatically returns to the locked position after being pressed. The elastic restoring force ensures consistent locking strength without requiring the user to apply excessive force to maintain the locked state, making operation easier while preserving locking strength.
Solution Approach 2:
The elastic member provides self-service by automatically returning the lever to the locked position after pressing, eliminating the need for the user to apply continuous or excessive force to maintain locking. The system uses the elastic restoring force to perform part of the work of securing the connection.
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 lever mechanism simplifies the locking and unlocking process, reducing the force needed and ensuring a secure airtight seal during inflation, while allowing quick detachment after inflation, enhancing user convenience and operational ease.
Implementation Method 1
at least one elastic member elastically pushing the force-bearing end to make the clamping end move toward a direction of the interface, when the force-bearing end is pressed, the elastic member is compressed to generate an elastic restoring force
Implementation Method 2
the force-bearing end is pressed by using the supporting portion as a fulcrum
Data Source
AI summary
A press structure for a pump head comprises a base body provided with a hollow space portion disposed with an air inlet and at least one air outlet, at least one supporting portion is disposed on an outer side of the base body; at least one hanging arm having a force-bearing end and a clamping end, the hanging arm is disposed on the supporting portion, the force-bearing end can be pressed by using the supporting portion as a fulcrum, the clamping end is disposed on an outer side of the air outlet, when the force-bearing end is pressed, the clamping end displaces away from the air outlet; and at least one elastic member elastically pushing the force-bearing end to make the clamping end move towards the air outlet, when the force-bearing end is pressed, the elastic member is compressed to generate an elastic restoring force.