Coaxial Pattern Selection Device for Payment Watch
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Solution Overview
Problem
Payment watches require a method to select payment options represented by patterns without using a display screen, as conventional screens are aesthetically unpleasing and energy-intensive, and existing solutions are costly and consume resources.
Innovation Solution
A coaxial counter device with two disks, where the internal disk rotates more slowly than the external disk, allowing for pattern selection without a display screen, using a reduction or multiplication gear ratio to change symbols visible through a window, actuated by a single electric motor to reduce complexity and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a display screen (LCD, OLED) is used to show payment options, then information display capability is improved, but aesthetic appeal and energy consumption are worsened
Solution Approach 1:
The patent extracts the display function from electronic screens and implements it through mechanical pattern selection. Two rotating discs with payment option patterns are positioned behind a transparent window, allowing visual display without electronic screens. This eliminates the need for LCD or OLED displays, thereby reducing energy consumption while maintaining aesthetic appeal and information display capability.
2Ease of operation
If multiple motors are used to rotate internal and external discs separately, then disc rotation control is improved, but device complexity and weight are worsened
Solution Approach 1:
The patent merges the rotation control of two separate discs into a single motor system. The motor shaft directly rotates the first disc, while the second disc is rotated through gear engagement with the first disc. This combining of control functions reduces the number of motors from two to one, simplifying the device structure and reducing weight while maintaining independent disc rotation control capability.
3Measurement precision
If a reduction ratio mechanism is used between internal and external discs, then pattern selection precision is improved, but mechanical complexity is worsened
Solution Approach 1:
The patent applies local quality by creating asymmetry in the gear engagement mechanism. The gear on the first disc engages with the gear on the second disc at a specific location, establishing a fixed reduction ratio (e.g., 2:1 or 3:1). This localized gear interaction provides precise rotational relationship control without requiring complex mechanisms throughout the entire system, thereby achieving pattern selection precision with minimal mechanical complexity.
Data Source
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Figure 4
AI summary
The invention relates to a device for selecting a combination of patterns, particularly for a timepiece, comprising: ▪ An inner disk (ID) having N angular sectors of the same size, each bearing a symbol (A, B, C, D) on its periphery, a symbol being defined as a pattern or the absence of a pattern, N being an integer greater than 1; ▪ An outer disk (OD) coaxial with the inner disk (ID) and of larger diameter, the outer disk (OD) bearing M symbols (E, F, G, H) distributed over M*N angular sectors of the same size, M being an integer greater than 1, each of the M symbols of the outer disk (OD) being repeated over N consecutive sectors of the outer disk (OD); ▪ A dial (CD) extending opposite the inner disk (ID), the dial (CD) comprising an aperture (GC) allowing a pattern (A, B, C, D) of the inner disk (ID) to be matched with a pattern (E, F, G,H) of the external disk (ED) ▪ Actuation means allowing rotation of the internal disk (ID), and gearing means coupling the two disks (ID, ED) according to a reduction ratio M.,