Integrally Formed Expanding Rivet for Window Handle Rosette
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Solution Overview
Problem
Existing handle rosettes for windows and doors are expensive and require significant assembly time due to complex fastening mechanisms involving separate parts and screw connections.
Innovation Solution
A handle rosette design featuring an integrally formed expanding rivet with an expanding bolt, which is easy to handle and manufacture, allowing for simple installation without screws, using a predetermined breaking point for easy expansion and a driving tool guide depression for assembly, and a spreading arrangement for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional through-holes and fastening screws are used, then reliable fixation is achieved, but assembly time increases and manufacturing complexity increases
Solution Approach 1:
The patent combines multiple separate fastening components (through-holes, fastening screws, and fixation mechanism) into a single integrated expanding rivet component. This merging eliminates the need for separate assembly steps, reducing assembly time while maintaining reliable fixation through the expanding mechanism that creates a dowel-like hold in the opening.
Solution Approach 2:
The expanding rivet is designed to be self-fixing through its expanding mechanism. When the expanding bolt is introduced into the expansion arrangement, it automatically spreads and secures itself in the opening without requiring external fastening screws or additional fastening operations, thereby eliminating assembly time loss.
2Reliability
If multiple separate parts are used for the fastening device, then adjustability and reliability are improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The patent integrates the expanding arrangement and expanding bolt into a single monolithic component formed as one piece with the rosette body. This merging reduces the number of separate parts from multiple fastening components to a single expanding rivet, simplifying the device while maintaining reliability through the integrated expanding mechanism.
Solution Approach 2:
The expanding rivet serves multiple functions simultaneously: it acts as a structural connector, an expanding mechanism, and a fixation device all in one component. This multi-functionality eliminates the need for separate parts while maintaining the reliability that would otherwise require multiple specialized components.
3Manufacturing precision
If separate fastening components are used, then precise positioning is achieved, but assembly steps increase and productivity decreases
Solution Approach 1:
The patent combines the positioning and fixation functions into a single expanding rivet component. The integrated design ensures precise positioning is achieved through the single-piece construction that eliminates misalignment issues between separate parts, while the expanding mechanism provides secure fixation, all accomplished in one assembly operation.
Solution Approach 2:
The expanding rivet is pre-configured with the expansion mechanism built into its structure. When installed, the expanding bolt automatically engages the expansion arrangement in the correct position, eliminating the need for separate positioning steps and multiple assembly operations, thereby increasing productivity while maintaining precision.
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
The solution reduces assembly complexity and time, ensuring a secure and cost-effective installation process with minimal parts, suitable for various window and door materials.
Implementation Method 1
the expanding rivet has an expanding arrangement and an expanding bolt which, in the non-riveted state, is integrally connected to the expanding arrangement. During assembly, the expanding rivet of the rosette handle is simply inserted into an opening provided on the sash and then the expansion bolt is inserted into the expansion arrangement, so that the latter spreads and - like a dowel - holds the rosette handle on the wing.
Implementation Method 2
Since it assumes this initial position as a result of the impact position, which is brought about via the predetermined breaking point that has not yet broken, it can be released by a simple impact or pressure application, and it can be introduced into the spreading arrangement in the exact position.
Implementation Method 3
the expansion bolt is attached to the expansion arrangement via a predetermined breaking point. This predetermined breaking point is destroyed when the expansion bolt is introduced into the expansion arrangement.
Implementation Method 4
the spreading arrangement has at least one spreading jaw. This jaw moves into a radial displacement position as a result of the introduction of the expanding bolt, as a result of which a gripping and/or clamping effect is exerted on the opening wall in the leaf and the handle rosette is thereby held.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A grip/handle rosette has a rosette body and fixture device for fastening a rosette on a window unit. The fixture device has at least one slotted rivet (8) designed integrally with the rosette body (4) in which the rivet comprises an expansion arrangement (10) and an expander bolt (11) which is integrally joined with the expansion arrangement in the non-riveted state or is arranged as a separate part and inserted into the expansion arrangement.