Watch Battery Extraction for Thinner Movement
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Solution Overview
Problem
The thickness and size constraints of batteries in electronic watches limit the reduction of the movement's thickness and size, as they need to be housed within the watch mechanism.
Innovation Solution
The battery is positioned between the dial and the movement with a through hole for the hand shaft, allowing it to be smaller in size while maintaining power supply, and is electrically coupled to the circuit, enabling a larger battery capacity without increasing the movement's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery is disposed in the movement, then the power supply is stable, but the thickness and size of the movement increase
Solution Approach 1:
The battery is extracted from the movement and positioned separately between the dial and the movement. This allows the battery to be removed from the space-constrained movement area, enabling the movement to be made thinner and smaller while the battery can be optimally sized for power supply needs.
2Duration of action of moving object
If the battery size is increased to increase capacity, then the power supply duration is extended, but the movement size must increase to accommodate it
Solution Approach 1:
By extracting the battery from the movement, the patent allows the battery volume to be increased for longer power supply duration without increasing the movement volume. The battery is positioned in the space between the dial and movement, separating the volume requirements of the power supply from the movement mechanism.
3Length of stationary object
If the battery is made thinner to reduce movement thickness, then the movement can be thinner, but the battery capacity is reduced
Solution Approach 1:
The battery is taken out from the movement and positioned between the dial and movement, allowing the battery to have sufficient thickness for adequate capacity without increasing the movement thickness. The movement thickness is now determined by the movement components themselves, not by the battery thickness.
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 configuration allows for a thinner and smaller watch movement while increasing battery capacity, ensuring stability and safety with an all-solid lithium secondary battery design.
Implementation Method 1
ensuring stability and safety with an all-solid lithium secondary battery design
Data Source
AI summary
An electronic watch includes a hand configured to indicate time, a dial including a mark, a movement including a hand shaft configured to rotate the hand and a motor configured to rotate the hand shaft, and a battery configured to supply power to the motor, wherein the battery is disposed between the dial and the movement, and has a first opening through which the hand shaft passes.