Utility Knife Blade Depth Adjustment and Release Mechanism
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Solution Overview
Problem
Existing utility knives lack effective blade depth adjustment, convenient blade release mechanisms, and optimal spare blade storage and dispensing features, which hinder user functionality and safety during operation.
Innovation Solution
A utility knife design featuring a blade depth adjustment assembly, a blade release mechanism, and a spare blade dispenser, including a handle, blade carrier, blade hood, pushrod, and slider, which allow for multiple blade depth positions, safe blade removal, and convenient spare blade storage and dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a blade cover is provided for safety, then safety is improved, but the blade cover interferes with front end blade change operation
Solution Approach 1:
The blade cover is pre-positioned in a retracted position that provides clearance for blade change operations. The cover can be manually repositioned to an extended position when not in use, but is configured to automatically or easily retract when blade change is needed, eliminating the interference problem while maintaining safety during cutting operations.
2Ease of operation
If manual manipulation of blade carrier release latches is used, then blade release is achieved, but additional task of repositioning blade cover interferes with blade change
Solution Approach 1:
The blade carrier release mechanism is merged with the blade cover repositioning mechanism. A single user action (such as pressing a button or moving a lever) simultaneously releases the blade carrier and repositions the blade cover, eliminating the need for separate manual operations and reducing the time required for blade changes.
3Adaptability or versatility
If blade depth adjustment is added to basic extend/retract function, then blade depth control is improved, but actuator mechanism complexity increases
Solution Approach 1:
The actuator mechanism is designed with dynamic, adjustable components that allow blade depth control. A movable slider or adjustable linkage system enables the user to select from multiple blade depth positions, transforming a static extend/retract mechanism into a dynamic, adaptable system that provides both depth control and basic extension functions.
4Quantity of substance
If spare blade storage receptacle is provided, then spare blade storage is achieved, but convenient dispensing and safe storage are not optimized
Solution Approach 1:
The spare blade storage system is designed with self-service features, including an accessible receptacle and an automatic or easy-to-operate dispensing mechanism. The system allows users to easily retrieve spare blades without complex manual manipulation, and may include features such as spring-loaded ejection or gravity-assisted dispensing that enable convenient access while maintaining secure storage.
Data Source
AI summary
A utility knife includes a handle and a blade carrier mechanically coupled to the handle, the blade carrier being configured to support a blade. The utility knife also includes a blade hood mechanically coupled to the handle facilitating manipulability of the blade hood to an extended position over the blade, a pushrod mechanically coupled to the blade hood, and a blade release member including a button that extends through a slot in the handle, the blade release member being repositionable by moving the button along the slot, a portion of the blade release member within the handle coming into contact with a protrusion of the pushrod when the blade release member is moved along the slot such that the pushrod is repositioned within the handle and the blade hood is retracted from the extended position to allow the blade to be removed from the blade carrier.