Trimmer Battery Bayonet and Cutting Gap Adjustment
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Solution Overview
Problem
Existing electric trimmers lack a convenient and efficient mechanism for adjusting the cutting gap and securing the battery pack, which can lead to suboptimal performance and user experience during hair trimming and grooming.
Innovation Solution
An electric-powered trimmer design featuring a handle with a battery pack that rotates for secure attachment, a cutting assembly with a moveable blade driven by a motor, and an adjustment mechanism using a thumb-operated wheel to change the cutting gap, along with a mounting system for easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional fixed battery pack design is used, then the structure is simple, but the battery pack security and user control are insufficient
Solution Approach 1:
The battery pack attachment mechanism transitions from a static fixed design to a dynamic system with multiple operational states. The bayonet-style attachment allows the battery pack to be securely locked in place during operation, while the release mechanism enables easy detachment when needed. This dynamic capability resolves the contradiction by providing both secure attachment (improving reliability) and operational simplicity (maintaining ease of use).
Solution Approach 2:
The battery pack incorporates a self-locking mechanism through the bayonet attachment design, where the natural insertion motion automatically engages the locking features. This self-service approach secures the battery pack without requiring additional fastening steps or complex locking mechanisms, thereby improving reliability while avoiding increased complexity.
2Measurement precision
If a fixed cutting gap is used, then the device structure is simple, but the cutting precision and adaptability are limited
Solution Approach 1:
The cutting assembly transitions from a fixed gap design to a dynamically adjustable system. The moveable blade can be positioned at different locations along its travel path, allowing the cutting gap to be varied. This dynamic adjustment capability enables precise cutting (improving measurement precision) while using a relatively simple linear adjustment mechanism rather than a complex multi-component system.
Solution Approach 2:
The cutting assembly is segmented into stationary and moveable blade components, with the moveable blade independently controllable along its axis. This segmentation allows the cutting gap to be adjusted by moving only the necessary component (the moveable blade) rather than adjusting the entire cutting assembly, thereby achieving cutting precision without excessive complexity.
3Ease of operation
If a simple mounting system is used, then the assembly is easy, but the ease of disassembly and maintenance is poor
Solution Approach 1:
The mounting system employs a self-locking bayonet mechanism where the attachment action automatically engages the locking features. This self-service design ensures secure assembly without requiring additional fastening steps. For disassembly, a simple release mechanism allows easy detachment, resolving the contradiction by providing both easy assembly (through self-locking) and easy disassembly (through the release mechanism) without compromising either aspect.
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
Enhances user control over cutting precision, extends battery pack security, and simplifies maintenance, providing a more efficient and user-friendly trimming experience.
Implementation Method 1
The electrical circuit includes a motor having a drive shaft. The moveable blade is configured to move along a first axis... A drive mechanism is connected between the drive shaft and the moveable blade to move the moveable blade relative to the stationary blade along the first axis
Implementation Method 2
The adjustment mechanism includes an adjustment screw operable to move the moveable blade along the second axis extending orthogonal to the first axis relative to the stationary blade to selectively change the size of the cutting gap
Data Source
AI summary
An electric-powered trimmer with a handle. A battery pack positioned in the handle. An electrical circuit positioned in the handle and electrically connected with the battery pack. The electrical circuit including a motor having a drive shaft, and a cutting assembly removeably coupled to the handle. The handle extends along a longitudinal axis and has an inner wall that defines a receptacle in a longitudinal end. The battery pack is configured to rotate about the longitudinal axis relative to the handle between (i) a first position in which the battery pack is secured within the receptacle of the handle and (ii) a second position in which the battery pack is configured to be removed from the receptacle of the handle. A plurality of light emitting diodes (LEDs) positioned in the inner wall of the handle. The inner wall includes a transparent section that covers the plurality of LEDs.