Watch Display Rocker Mechanism for Jam-Free Manual Setting
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Solution Overview
Problem
Conventional display devices for watch movements suffer from jamming and damage issues when users manually adjust time settings, particularly when attempting to adjust the indication manually while the actuation system is active.
Innovation Solution
A display device for watch movements featuring a rocker mechanism that pivots between engaged and disengaged positions with a toothed wheel, ensuring the toothed wheel is disengaged during manual adjustment to prevent jamming or damage, utilizing a return mechanism to automatically reengage the wheel when the rocker is in its stable position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the toothed wheel is engaged with the crown for automatic actuation, then the indication can be updated automatically, but jamming or damage occurs if manual adjustment is attempted simultaneously
Solution Approach 1:
The rocker is designed to be movable between two positions: engaged position (for automatic actuation) and disengaged position (for manual adjustment). This dynamic reconfiguration allows the system to switch between automatic and manual modes, preventing the jamming and damage that occurs when both operations occur simultaneously.
Solution Approach 2:
The rocker acts as an intermediary mechanism that controls the engagement between the toothed wheel and the crown. By introducing this intermediate element, the system can safely transition between automatic and manual operation modes, eliminating the direct conflict between the two actuation methods.
2Ease of operation
If the toothed wheel is disengaged from the crown for manual adjustment, then manual correction can be made safely, but automatic actuation cannot occur simultaneously
Solution Approach 1:
The rocker enables dynamic switching between manual and automatic modes. When the user needs to perform manual adjustment, they move the rocker to the disengaged position, allowing safe manual correction without automatic actuation interference. After manual adjustment, the rocker returns to the engaged position to resume automatic actuation.
Solution Approach 2:
The system operates in periodic cycles: automatic actuation occurs during normal operation, and manual adjustment occurs periodically when the user needs to correct the indication. The rocker facilitates this periodic switching between the two modes of operation.
3Reliability
If a rocker mechanism is introduced to switch between engaged and disengaged positions, then jamming is prevented, but device complexity increases
Solution Approach 1:
The rocker serves multiple functions: it controls the engagement of the toothed wheel with the crown, provides a switching mechanism between automatic and manual modes, and can be actuated by various means (push button, lever, or direct manual operation). This multi-functionality justifies the added complexity by consolidating several control functions into a single component.
Data Source
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AI summary
Display device (1) for watch movement, comprising: - an indicating mobile (5) including an indicating member (3) fixed in rotation to a toothed wheel (9) and a star (7) arranged to be positioned by a jumper (11); - a crown (13) with internal teeth arranged to be pivoted by said watch movement and to cooperate with said toothed wheel (9). According to the invention, said display device (1) further comprises a rocker (15) pivotally mounted on a frame element (17) and carrying said jumper (11) as well as said indicating mobile (5), said rocker (15) being arranged to be pivoted between a first position, in which said toothed wheel (9) meshes with said crown (13), and a second position, in which said toothed wheel (9) is disengaged from said crown (13) and said star (7) cooperates with an actuating element (23) fixed on a frame element (18) to pivot said indicating mobile (5).