Knife Connecting Base With Lock-Release Button For Safe Blade Replacement
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Solution Overview
Problem
Conventional knives and scalpels with replaceable blades require the use of both hands and significant force to mount or detach blades, posing safety and convenience issues due to the need for deformation or twisting of the blade, which is difficult and unsafe with sharp cutting edges.
Innovation Solution
A knife design featuring a connecting base with a lock-release button that allows for rapid and safe blade replacement by using a single hand to engage and disengage the blade from the base, eliminating the need for two-handed operation and blade deformation, using a lock-release mechanism with a positioning sleeve, elastic element, and lock-release posts to secure the blade in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional blade replacement mechanisms are used, then blade replaceability is achieved, but operation complexity and safety risks increase due to requiring two-handed operation and significant force
Solution Approach 1:
The lock-release button automatically actuates the locking and unlocking mechanisms through elastic element engagement, allowing the blade to be secured or released with a simple single-handed button press rather than requiring manual manipulation of complex locking components
Solution Approach 2:
The elastic element serves as an intermediary between the lock-release button and the locking posts, translating the button's linear motion into the rotational or lateral movement needed to engage or disengage the locking posts from the blade's locking grooves
2Stability of the object's composition
If conventional blade securing mechanisms are used, then blade stability is achieved, but device complexity increases due to requiring multiple components and assembly steps
Solution Approach 1:
The locking posts are integrated directly into the connecting base structure, and the elastic elements are pre-positioned within the base, merging the locking mechanism components into a unified assembly that reduces the number of separate parts and simplifies the overall structure
Solution Approach 2:
The blade is designed with distinct locking grooves at specific positions along its length, segmenting the engagement points to allow for precise positioning and stable attachment to multiple locking posts simultaneously, enhancing stability without adding complexity
3Reliability
If forceful blade manipulation is required for replacement, then secure engagement is achieved, but safety risks increase due to handling sharp edges under stress
Solution Approach 1:
The elastic elements automatically engage the locking posts with the blade's locking grooves through pre-loaded spring force, securing the blade reliably without requiring the user to apply manual force to the blade itself, thereby eliminating safety risks associated with handling sharp edges under stress
Solution Approach 2:
The manual mechanical force application system is replaced with an elastic element-based automatic locking system that uses spring force to secure the blade, substituting user-applied mechanical stress with a self-actuating elastic mechanism that maintains secure engagement
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
Enables easy, safe, and rapid blade replacement and securement, improving user safety and convenience by allowing single-handed operation and eliminating the need for forceful blade manipulation, thus enhancing portability and usability.
Implementation Method 1
The elastic element has one end that can press against an inner surface of the other end of the positioning sleeve through the slide groove and the other end that can be positioned at and press against an inner surface of the positioning groove to allow the locking post to slide in the slide groove along the axial direction of the positioning sleeve
Data Source
AI summary
A knife allowing rapid and safe replacement and securement of a blade which can be fixed to a front end of a connecting base of the knife. The connecting base has a rear end that can be connected to a handle, and includes an upper base body, a lower base body, a lock-release member, and a spacer plate that can be located between the upper and lower base bodies and form an engaged-connection groove along with the base bodies therebetween. The engaged-connection groove matches, and enables the insertion therein and engagement therewith, a portion of the blade at or adjacent to the rear end thereof. The lock-release member can be arranged on the connecting base for a user to set the blade into a locked state, in which the blade is securely positioned and cannot be detached, or an unlocked state, in which the blade can be detached.