Shaving Razor Pivot Lock Mechanism
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Solution Overview
Problem
Current wet shaving razors with pivot locking mechanisms are not intuitive for consumers to use and often require the user to change their hand position, limiting their effectiveness for trimming and shaving around sensitive areas.
Innovation Solution
A shaving razor with a pivot locking mechanism featuring a pusher member that slides between engaged and disengaged positions, allowing the cartridge to pivot freely or lock in place without requiring the user to alter their hand position, facilitated by a latch and base member design that allows for easy operation with a single finger or thumb.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a pivot locking mechanism is provided to enable trimming and shaving around sensitive areas, then the versatility of the razor is improved, but the ease of operation deteriorates because the user must change hand position to activate the mechanism
Solution Approach 1:
The pivot locking mechanism is designed to be automatically activated by the user's natural gripping motion. When the user grips the handle, their thumb or finger naturally presses against the pusher member, which automatically engages or disengages the pivot lock without requiring any additional hand movements or position changes. This self-service design eliminates the contradiction by making the versatility feature activate itself through the user's normal shaving grip.
2Measurement precision
If a pivot locking mechanism is provided to lock the cartridge in position for trimming, then the precision of trimming is improved, but the device complexity increases due to additional locking components
Solution Approach 1:
The locking mechanism is segmented into distinct functional components: a pusher member that translates linear motion into engagement force, a latch member that provides the actual locking action, and a biasing member that maintains default positioning. This segmentation allows each component to perform its specific function with simple geometry, avoiding the need for complex integrated mechanisms while achieving reliable pivot locking for precise trimming.
Solution Approach 2:
The pusher member acts as an intermediary between the user's gripping action and the latch mechanism. Instead of requiring the user to directly manipulate complex locking components, the pusher member translates simple linear pressure into the engagement or disengagement of the pivot lock, simplifying the user interface while maintaining reliable locking functionality for precise trimming.
3Reliability
If the pivot locking mechanism locks the cartridge biasing member, then the pivot locking reliability is improved, but the ease of operation worsens because it interferes with the natural shaving motion
Solution Approach 1:
The mechanism dynamically switches between two states: when the pusher member is pressed, it engages the latch to lock the pivot for trimming; when released, the biasing member automatically returns the latch to the unlocked position, allowing natural cartridge pivoting during shaving. This dynamic state transition ensures reliable locking when needed while automatically restoring natural motion when the locking force is removed, eliminating the contradiction between reliability and ease of operation.
Data Source
AI summary
A shaving razor with a handle having a gripping portion extending along a longitudinal axis and a head. A cartridge mounted to the handle and has a shaving surface with at least one blade having a blade edge, and an opposing surface. The cartridge has a forward and a rearward pivot position relative to the handle. A pivot locking mechanism positioned on the head of the handle having a pusher member that slides toward and away from the cartridge between an engaged position and a disengaged position. The pusher member in the engaged position directly contacts the opposing surface of the cartridge forcing the cartridge in the forward position preventing the cartridge from pivoting with respect to the handle. The pusher member in the disengaged position is spaced apart from the opposing surface of the cartridge in the forward position allowing the cartridge to pivot relative to the handle.