Cutter Knife Slide Segmentation for Safe Blade Handling
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Solution Overview
Problem
The handling of cutter knives is hazardous and cumbersome due to the manual removal and insertion of blades, which requires exposing the blade holder and can lead to accidents and increased time for blade replacement.
Innovation Solution
The cutter knife design features a slide with a front and rear part that are displaceable relative to each other, allowing for a short removal path and a locking mechanism to secure the slide in place, enabling safer and faster blade handling by reducing the need for complete disassembly and reassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the slide is completely removed from the housing for blade replacement, then the blade holder is accessible for blade removal and insertion, but the handling becomes dangerous and cumbersome, and the housing may be lost
Solution Approach 1:
The slide is divided into two displaceable parts: a front slide part containing the blade holder and a rear slide part that remains in the housing. This segmentation allows the front part to be removed for blade replacement while the rear part stays anchored, eliminating the risk of losing the housing while maintaining blade accessibility
Solution Approach 2:
The front slide part is nested within the rear slide part, which itself is nested in the housing. This nested structure enables the front part to be extracted for blade replacement while the rear part remains as a guide and anchor, providing safe and controlled access to the blade holder
2Ease of operation
If the slide is completely removed from the housing for blade replacement, then the blade holder is accessible, but the reassembly process becomes laborious and time-consuming
Solution Approach 1:
By segmenting the slide into front and rear parts, only the necessary front portion needs to be removed for blade replacement. The rear part remains in place as a guide, dramatically simplifying the reassembly process compared to removing the entire slide
Solution Approach 2:
The rear slide part is prepared in advance by remaining positioned in the housing with guide elements that will automatically guide the front slide part back into place during reassembly, eliminating the need for complex alignment procedures
3Ease of operation
If the receiving space is completely exposed from the housing, then blade removal and insertion is possible, but the displacement path is long and handling is cumbersome
Solution Approach 1:
The slide is segmented so that only the front slide part containing the receiving space needs to be displaced for blade replacement. The rear slide part remains fixed in the housing, creating a short, controlled displacement path that is sufficient for blade access but does not require complete removal
Solution Approach 2:
Instead of completely removing the entire slide from the housing, only the necessary front portion is partially displaced to the extent needed for blade replacement. This partial action achieves the required functionality with minimal movement and reduced handling complexity
Data Source
Figure 1a~1c
Figure 2a~5c
Figure 6a~7b
AI summary
The invention relates to a cutter knife (1), in particular a cardboard cutting knife, comprising a housing (3), which has an outlet opening (9), and a slide (4), which is guided in the housing (3) such that it can be moved in and counter to the working direction, wherein the slide (4) has a recess (6) with a flat receiving space (5) for an exchangeable flat blade (K) with a cutting edge (S) and the narrow side of the receiving space (5) has an opening (7) for at least partially exposing the cutting edge (S) of the blade (K). The slide (4) can be moved by means of manually introducing a displacing force via an entry opening (8) in the housing (3). For safe handling, when the slide (4) is to be fitted with the blade (K), it can be moved in the working direction (r) into a removal position, in which the receiving space (5) protrudes completely from the housing (3) and the slide (4) is secured against being pushed out completely from the housing (3).