Electronic Pen Dual Ring Sealing for Pressure Transmission
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Solution Overview
Problem
Existing electronic pens used with tablet PCs, which have a size equivalent to a general ballpoint pen, face challenges in maintaining waterproof and dust-proof functions due to the large elastic parts required to seal the casing, which can interfere with the transmission of writing pressure to the pressure detector.
Innovation Solution
The electronic pen incorporates a tubular casing with a core body and a core body holding part, along with first and second ring-shaped elastic components that contact the internal constituent parts and the core body holding part, respectively, to prevent water and dust from reaching the electronic components while allowing for effective writing pressure transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single large elastic part is used to seal the casing opening, then waterproof and dust-proof functions are achieved, but writing pressure transmission to the pressure detector is interfered with
Solution Approach 1:
The single large elastic part is divided into two separate ring-shaped elastic parts: a first ring-shaped elastic part and a second ring-shaped elastic part. The first elastic part seals the gap between the internal constituent part and the casing, while the second elastic part seals the gap between the core body holding part and the internal constituent part. This segmentation allows each elastic part to be optimized for its specific function, preventing water and dust while enabling proper writing pressure transmission to the pressure detector.
2Reliability
If the elastic part directly acts on the core body to seal the opening, then waterproofing and dust-proofing are achieved, but the writing pressure applied to the core body cannot be conveyed to the writing pressure detector
Solution Approach 1:
The first and second ring-shaped elastic parts serve as intermediaries that seal the gaps between components without directly acting on the core body in a way that blocks pressure transmission. The elastic parts are positioned to seal interfaces between the casing, internal constituent part, and core body holding part, allowing the core body to transmit writing pressure through the holding part to the pressure detector while the elastic parts maintain the waterproof and dust-proof seal at the opening.
3Device complexity
If a simple configuration with a single elastic part is used, then the electronic pen structure is simplified, but the writing pressure detection function deteriorates when used with tablet PCs
Solution Approach 1:
The sealing structure is segmented into two ring-shaped elastic parts positioned at different locations within the casing. This segmentation provides a more effective seal that prevents water and dust from reaching the pressure detector, ensuring accurate writing pressure detection while maintaining a relatively simple overall configuration. The first elastic part seals the outer interface, and the second elastic part seals the inner interface, creating a robust sealing system.
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 ensures that the electronic pen maintains its waterproof and dust-proof functions without compromising the writing pressure detection, even when used with larger devices like tablet PCs, thus preventing electrical failures and ensuring reliable operation.
Implementation Method 1
a first ring-shaped elastic component in contact with an entirety of a circumference of a side surface of the internal constituent part and an entirety of a circumference of an inner wall surface of the casing, and a second ring-shaped elastic component in contact with the whole circumference of a side surface of the core body holding part and the whole circumference of an inner wall surface of the internal constituent part
Data Source
AI summary
Disclosed is an electronic pen including a casing, a core body, a core body holding part disposed in the casing and holding a portion of the core body, electronic parts disposed at a rear stage of the core body holding part in the casing and performing electronic pen functions, an internal constituent part through which the core body penetrates on a pen tip side in the casing, a first ring-shaped elastic component in contact with an entirety of a circumference of a side surface of the internal constituent part and an entirety of a circumference of an inner wall surface of the casing, and a second ring-shaped elastic component in contact with an entirety of a circumference of a side surface of the core body holding part and an entirety of a circumference of an inner wall surface of the internal constituent part.