Push-Type Pump Dispenser With Inclined Finger Abutment
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Solution Overview
Problem
Conventional trigger-type pump dispensers are difficult for individuals with small hands, aged persons, or those with reduced grasping force to operate, as they require a full palm grip and can result in liquid adherence to the user's hand, leading to unnatural thumb motion and potential staining.
Innovation Solution
A push-type pump dispenser design where the nozzle head is positioned above a grip, allowing efficient finger force transmission by pushing down on an overhanging nozzle head portion, with a grip formed in an L shape and a finger abutting portion inclined between 3° to 10° to enhance operability and prevent liquid contact with the user's hand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a trigger-type pump dispenser is designed for easy operation, then it requires a full palm grip and lateral trigger pulling, but this causes liquid to adhere to the user's hand resulting in dirt and staining
Solution Approach 1:
The pump dispenser is segmented into distinct functional zones: a grip portion for hand placement and a nozzle head portion for operation. This spatial segmentation allows the user's hand to be positioned away from the liquid discharge area, preventing liquid adherence while maintaining ease of operation.
Solution Approach 2:
The grip portion acts as an intermediary structure that mediates between the user's hand and the pump mechanism. By providing a dedicated grip area with an inclined finger abutting portion, it enables operational force application without requiring the hand to contact the nozzle or liquid path.
2Force
If a trigger-type pump dispenser requires full palm grip and lateral trigger pulling, then it achieves adequate force application, but it becomes difficult for children, aged persons, or those with reduced grasping force to operate
Solution Approach 1:
The finger abutting portion is designed with a specific inclination angle (5° to 15°) that optimizes the mechanical advantage for force application. This parameter change allows users with limited strength to generate sufficient operating force through a pushing motion that better leverages their finger strength rather than requiring full palm grip and lateral trigger pulling.
3Device complexity
If the nozzle head is pushed down linearly to form injecting pressure, then the structure is simple, but the thumb requires arc-shaped motion resulting in unnatural movement
Solution Approach 1:
The finger abutting portion is positioned on the lateral side of the nozzle head rather than directly on top. This dimensional repositioning allows the thumb to push in a more natural forward direction while still achieving the required linear downward motion of the nozzle head through the pump mechanism's internal linkage.
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 design enables efficient finger force transmission, improved operability, and reduced hand contamination, making it suitable for users with limited grasping strength or small hands, including children and aged individuals, while maintaining stability with heavy containers.
Implementation Method 1
a finger abutting portion S of the grip portion 12 is wholly located outside (behind) a power point P1 of the finger putting portion 31 of the nozzle head portion 3... efficient transmission of a finger force is achieved
Data Source
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AI summary
In a pump dispenser having a form where a user grasps a grip to push down a finger putting portion with the user's thumb, the present invention provides a push-type pump dispenser that has a good transmission property of a finger force and is excellent in operability. The present invention is a push-type pump dispenser A that injects liquid within a cylinder portion 11 from a nozzle portion 32 by pushing down the finger putting portion 31 located above a grip portion 12 in a state where the grip portion 12 has been grasped by a user, wherein a finger abutting portion S of the grip portion 12 is located behind a power point P1 of the finger putting portion 31.