Watch Push Button Filtration Against Sand and Mud Intrusion
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Solution Overview
Problem
Existing push button devices for wristwatches are prone to deteriorated operability due to foreign substances like mud or sand intruding into the recess section, which affect the resilient deformation of the coil spring, leading to compromised functionality.
Innovation Solution
Incorporation of a first filter in the recess section and a second filter in the head section, both made of porous material with varying air bubble sizes and structures, to restrict the passage of foreign substances, ensuring effective waterproofing and maintaining operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the recess section is left open for operation member movement, then the operation member can be pressed and return smoothly, but foreign substances can intrude into the recess section affecting spring deformation
Solution Approach 1:
The patent applies porous material filters (first filter and second filter) in the recess section and head section respectively. These filters allow air and steam to pass through while blocking foreign substances like sand and mud, thus protecting the coil spring from contamination while maintaining the operational functionality of the push button device
Solution Approach 2:
The patent introduces filters as intermediary elements between the external environment and the internal recess section. The first filter in the recess section and the second filter in the head section act as mediators that allow necessary air flow for spring operation while preventing harmful foreign substances from entering and affecting the spring's resilient deformation
2Reliability
If filters are added to prevent foreign substance intrusion, then waterproofing and operability are maintained, but device complexity increases
Solution Approach 1:
The patent divides the filtering function into two separate filters: a first filter located in the recess section and a second filter located in the head section. This segmentation allows each filter to perform its function independently, with the first filter blocking foreign substances from the recess section and the second filter blocking substances from entering the operation member, thereby enhancing reliability while distributing structural complexity across multiple components
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 filters effectively prevent the intrusion of foreign substances, maintaining the push button's functionality and waterproofing, thereby enhancing the device's reliability and durability.
Implementation Method 1
both made of porous material with varying air bubble sizes and structures, to restrict the passage of foreign substances
Data Source
AI summary
A push button device including a supporting member which is provided with a through hole and in which a recess section is provided outside the through hole, an operation member which includes a shaft section that is slidably inserted into the through hole, and a head section that is provided on an outer end of the shaft section and slidably fitted into the recess section, a first filter which is provided in the recess section and arranged at a position surrounded by an annular first groove section into which an outer circumferential convex section of the head section is fitted and the outer circumferential convex section, and a second filter which is provided in the head section and arranged at a position surrounded by an annular second groove section into which an inner circumferential convex section of the recess section is fitted and the inner circumferential convex section.