Watch Wristband Pin Assembly With Inserted Wear Interface
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Solution Overview
Problem
Existing wristband fixation solutions for watches are inadequate in terms of reliability, robustness, user-friendliness, and aesthetic appeal, failing to prevent unintended detachment, wear, and ease of replacement.
Innovation Solution
A fixing device comprising a connecting element with retractable pins and a receiving element with bores, utilizing inserts to minimize frictional wear and enhance esthetic appearance, allowing for reliable, robust, and user-friendly attachment and detachment of the wristband.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pin is used to connect the wristband to the watch middle, then the wristband can be securely retained and articulated, but frictional wear occurs on rotation of the pin relative to the connecting element and receiving element
Solution Approach 1:
An insert is introduced as an intermediary element between the pin and the bore of the receiving element. This insert acts as a mediator that reduces direct metal-to-metal contact, thereby minimizing frictional wear while maintaining the articulation function. The insert is rotatably mounted in the bore and engages with the pin, providing a low-friction interface that protects the pin from wear during rotation.
2Ease of operation
If the pin is made retractable to enable easy removal, then user-friendliness is improved, but the device complexity increases
Solution Approach 1:
The pin is designed to be movable between a retracted position (for easy removal) and a projecting position (for secure connection). This dynamic configuration allows the pin to adapt its state based on operational needs. The insert also benefits from this dynamics as it can be accessed when the pin is retracted for maintenance or replacement without requiring complete disassembly of the fixing device.
3Reliability
If the pin projects from the connecting element for secure connection, then connection reliability is improved, but frictional wear on the pin increases
Solution Approach 1:
The insert serves as a protective intermediary between the pin and the bore, significantly reducing frictional wear during the pin's projecting state. This mediator allows the pin to maintain its projecting position for reliable connection over extended periods without suffering from excessive wear that would otherwise limit its service life.
4Device complexity
If a traditional pin connection is used, then the structure is simple, but the esthetic appearance may be compromised
Solution Approach 1:
The insert is positioned locally within the bore of the receiving element, specifically at the interface where the pin rotates. This localized intervention allows the pin connection mechanism to remain simple in overall structure while the insert provides enhanced esthetic appearance and reduced frictional wear at the critical interface point.
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 provides a reliable, robust, and user-friendly attachment mechanism that minimizes wear and maintains an attractive appearance, ensuring secure and easy replacement of the wristband.
Implementation Method 1
the at least one insert forming an interface between said at least one pin and said at least one bore of the receiving element and/or said housing to minimize frictional wear on rotation of said at least one pin relative to the receiving element and/or to the connecting element, respectively
Data Source
AI summary
The device for fixing a wristband to a watch middle includes a connecting element (11) for connection to a wristband (10) or a watch middle (20), at least one pin (1) able to occupy two positions, one projecting from the connecting element (11) and another retracted into a housing (11a) of the connecting element (11), and a receiving element (21) for connection to a watch middle (20) or a wristband (10), having at least one bore (21a). The fixing device includes at least one insert (5), and is designed to occupy at least two configurations: a first configuration in which the at least one pin (1) occupies a position retracted into the connecting element (11), enabling a wristband to be separated from a watch middle, and a second configuration in which the at least one pin (1) occupies a position projecting from the connecting element and is positioned in the at least one bore (21a) of the receiving element (21), the at least one insert (5) forming an interface between the at least one pin (1) and the at least one bore (21a) and/or the housing (11a) to minimize frictional wear on rotation of the at least one pin (1) relative to the receiving element (21) and/or the connecting element (11) respectively.