Inhaler Actuator Reduces Piercing Force via Segmented Design
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Solution Overview
Problem
Existing inhalers require significant force to pierce medication capsules, which can be challenging for users with limited mobility or dexterity, such as those with arthritis, and do not provide intuitive or hygienic operation.
Innovation Solution
The inhaler features a two-part actuating member with a larger surface area and a recessed design that reduces the force required to pierce capsules, combined with grip aids and a spring-loaded mechanism for easier operation, and improved ergonomics to facilitate intuitive use and hygiene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a small actuating member is used, then the device complexity is reduced, but the force required to pierce the capsule increases to 35 Newtons
Solution Approach 1:
The actuating member is designed with a two-part construction where the outer part has a larger surface area than the inner part, creating a dimensional difference that provides mechanical advantage. This dimensional change allows the user to apply force over a larger area, reducing the effort needed to pierce the capsule while maintaining a relatively simple overall structure.
2Ease of operation
If the actuating member surface area is increased, then the ease of operation is improved, but the device complexity increases due to two-part construction
Solution Approach 1:
The actuating member is segmented into an inner part and an outer part, where the outer part has a larger surface area for user interaction and the inner part transmits the force to pierce the capsule. This segmentation allows the device to provide an enlarged gripping surface for ease of operation while maintaining a compact and relatively simple internal structure.
3Ease of operation
If the recess in the actuating member is made larger to enable lid release, then the ease of operation is improved, but the actuator surface area is reduced
Solution Approach 1:
The actuating member features a localized recess with an inclined sliding surface specifically positioned to engage the closure element. This local modification provides the necessary function for lid release without significantly reducing the overall surface area of the actuator, maintaining both operational ease and adequate gripping surface.
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 redesigned inhaler reduces the force needed to pierce capsules to 10-25 Newtons, making it easier for users to operate, especially those with limited mobility, while enhancing hygiene and intuitive use through improved ergonomics and design features.
Implementation Method 1
at least one further spring element can be arranged between the plate and the lower part to support the opening movement, so that the lid and/or the mouthpiece snaps open
Implementation Method 2
the actuating member has a recess on its upper side which is inclined in such a way that it forms a sliding surface for the closure element in the form of an inclined plane and, when the actuating member is actuated and thus pushed forward, releases the cover from the base
Data Source
Figure 1
AI summary
The invention relates to an inhaler permitting improved actuation and designed for inhalation of powdery medicaments from capsules which, prior to use, are inserted into a capsule holder arranged in the inhaler. After inserting the capsule into the capsule holder, the patient can press an actuating element which can be set in motion from a rest position and which in doing so engages with at least one needle that can pierce into the capsule holder. With the aid of the at least one needle, the capsule is punctured and the medicament is released. According to the invention, the object is achieved by an inhaler with an improved actuating element (7, 10).