Appliance Handle Interlocking Mechanism for Stable Connection
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Solution Overview
Problem
The existing methods for attaching the outer decorative part to the inner functional part of a handle element in closure elements, such as in kitchen appliances, face challenges including uneven gaps, noise due to play, and difficulty in non-destructive disassembly, which affect both the visual appeal and functionality.
Innovation Solution
A non-positively interlocking connection between the outer and inner parts of the handle element using obliquely oriented receptacles and straight-line holding elements, providing a secure, frictional connection that allows for precise positioning and easy disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer part is bonded to the inner part using adhesive, then the connection is secure, but the gap becomes uneven and may widen under load over time
Solution Approach 1:
The patent replaces the chemical bonding mechanism (adhesive) with a mechanical interlocking mechanism consisting of a receptacle in the inner part and a holding element in the outer part. This mechanical connection provides both secure strength and precise gap control, eliminating the degradation issues associated with adhesive bonding under load.
2Ease of manufacture
If the outer part is locked or snap-locked to the inner part, then assembly is easy, but friction and clicking noises occur during handling
Solution Approach 1:
The patent creates a dynamic yet stable connection where the holding element fits precisely into the receptacle without excessive play. The oblique orientation of the holding element allows for easy insertion during assembly, while the precise fit prevents friction and clicking noises during subsequent handling, eliminating the harmful effects of poor mechanical clearance.
3Strength
If the outer part is glued or locked to the inner part, then the connection is strong, but disassembly causes damage or becomes impossible
Solution Approach 1:
The patent segments the connection into separable mechanical components: an inner part with a receptacle and an outer part with a holding element. This segmentation allows the connection to be strong during use while enabling damage-free disassembly by simply removing the holding element from the receptacle, facilitating repair and replacement without damaging either component.
4Shape
If a grub screw connection is used from below, then the screw connection becomes visually invisible, but manufacturing and assembly effort increases
Solution Approach 1:
The patent extracts the fastening function from a visible screw connection and implements it through an integrated mechanical interlocking system. The holding element in the outer part engages with the receptacle in the inner part, providing both structural connection and aesthetic appearance without requiring separate fastening components or increased manufacturing complexity.
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
This solution creates a firm, stable, and play-free connection that maintains visual appeal while enabling easy replacement or repair of the outer part, enhancing both the functional and aesthetic aspects of the handle element.
Implementation Method 1
A non-positively interlocking connection between the outer and inner parts of the handle element using obliquely oriented receptacles and straight-line holding elements, providing a secure, frictional connection
Data Source
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AI summary
The invention relates to a device (1), preferably a household appliance (1), particularly preferably a kitchen appliance (1), and most preferably a cooking appliance (1), with an interior having an access opening and with a locking element (12) which is designed to be moved by a user by means of a handle element (13) in order to close and release the access opening of the interior, wherein the handle element (13) has at least one inner part (14) which is fixedly connected to the locking element (12) and at least one outer part (15) which is fixedly connected to the inner part (14) of the handle element (13).The device (1) is characterized in that the outer part (15) of the handle element (13) has at least one retaining element (15a) extending in a straight line along a joining direction and the inner part (14) of the handle element (13) has at least one corresponding interlocking receptacle (14a) which extends obliquely away from the outer part (15) along the joining direction, wherein the outer part (15) of the handle element (13) is positively connected to the inner part (14) of the handle element (13) by means of the interlocking of the interlocking receptacle (14a) of the inner part (14) of the handle element (13), or vice versa.