Shaver Cartridge Ejection via Perpendicular Spring Mechanism
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Solution Overview
Problem
Existing shavers with interchangeable cartridges require users to manually push or pull the cartridge for removal, increasing the risk of injury and necessitating replacement of the entire shaver head when blades become worn, which is costly and environmentally inefficient.
Innovation Solution
A shaver design featuring a pivotally attached shaver head with a spring mechanism that ejects the cartridge perpendicular to the shaving direction, allowing for easy removal without manual contact and enabling only the cartridge to be replaced, reducing material waste and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cartridge is designed to be manually pushed or pulled for removal, then the user can directly control the cartridge removal process, but the risk of user injury increases due to direct contact with blades
Solution Approach 1:
A pusher mechanism is introduced as an intermediary component between the user's finger and the cartridge. The pusher encounters the cartridge and transfers the ejection force, allowing the user to operate the release mechanism without direct contact with the blade-containing cartridge, thereby eliminating the injury risk while maintaining operational control
Solution Approach 2:
The spring mechanism is designed to automatically eject the cartridge when the locking engagement is released by the pusher. The stored elastic energy in the spring self-propels the cartridge away from the shaver head without requiring the user to manually handle or pull the cartridge, further reducing direct contact and injury risk
2Reliability
If the entire shaver head is replaced when blades become worn, then the shaver maintains optimal performance, but the cost increases and material waste increases
Solution Approach 1:
The shaver system is divided into separable components: the shaver head (housing, mounting mechanism, spring) and the cartridge (blade assembly). This segmentation allows the cartridge to be independently replaced when blades wear, while the more expensive shaver head components are retained and reused, reducing material waste and replacement costs
Solution Approach 2:
The design enables selective discarding of only the consumable cartridge portion when blades become worn, while recovering and reusing the durable shaver head components. This selective replacement strategy reduces overall material waste compared to replacing the entire shaver head assembly
3Reliability
If the entire shaver head is replaced when blades become worn, then the shaver maintains optimal performance, but the manufacturing cost and complexity increase
Solution Approach 1:
Dividing the shaver into modular components (shaver head and cartridge) allows for simplified manufacturing of each separate part. The cartridge can be produced as a standardized, easily manufactured unit that interfaces with the shaver head, reducing overall manufacturing complexity compared to producing a single integrated unit that would require more complex tooling and assembly processes
Solution Approach 2:
The cartridge is designed as a disposable, low-cost component with a simplified structure optimized for easy manufacturing and replacement. By making the cartridge inexpensive and simple to produce, the overall system becomes easier to manufacture while maintaining performance through selective replacement of only the consumable portion
4Ease of operation
If the cartridge is ejected in a direction perpendicular to the shaving direction, then the removal process becomes safer and easier, but the spring mechanism becomes more complex
Solution Approach 1:
Instead of ejecting the cartridge in the same direction as the shaving motion (forward), the mechanism is designed to eject it perpendicular to that direction (backward or sideways). This inversion of the ejection direction utilizes the natural geometry of the spring and holder arrangement to achieve safer, easier removal without significantly increasing mechanical complexity
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 solution enhances user safety by eliminating direct contact with blades during removal, lowers costs by extending the life of the shaver head and handle, and simplifies manufacturing and disposal by reducing the amount of material replaced.
Implementation Method 1
a spring provided on the shaver head, the spring being adapted to attach the cartridge to the shaver head, wherein the spring comprises at least one part which forms a loop
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 1e~2a
AI summary
A shaver is provided, the shaver comprising a handle with an elongated handgrip portion and a mounting portion, a shaver head pivotally attached to the mounting portion, a removable cartridge comprising at least one blade, the cartridge being adapted to be attached to the shaver head and removed from the shaver head, a pusher, adapted to encounter the cartridge to release the cartridge from the shaver head, and a spring provided on the shaver head, the spring being adapted to attach the cartridge to the shaver head, the spring comprising at least one part which forms a loop.