Position Indicator With Shared Pen Pressure Detection
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Solution Overview
Problem
The high cost of position indicators due to the need for expensive cartridges with integrated pen pressure detecting portions for each color or function, such as black, red, and eraser functions, increases the economic burden on users who want to utilize multiple functions.
Innovation Solution
A position indicator design featuring a dedicated casing with a common pen pressure detecting portion for multiple core bodies, allowing only one pen pressure detecting portion to be shared among all core bodies, reducing the need for expensive cartridges with integrated pressure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate cartridges with integrated pen pressure detecting portions are used for each core body (black, red, eraser), then each core body can have independent pressure detection capability, but the overall cost of the position indicator increases significantly
Solution Approach 1:
The patent merges the pen pressure detection function from individual cartridges into a single common detection portion located in the casing. The detection portion includes a detection element and signal processing circuitry that serves all core bodies (black, red, eraser) simultaneously, eliminating the need for separate pressure sensors in each cartridge and significantly reducing overall cost.
Solution Approach 2:
The common pen pressure detecting portion is designed to universally detect pressure for all different types of core bodies. The detection system is multi-functional, capable of detecting pressure whether the black core, red core, or eraser core is being used, making the pressure detection capability applicable to all writing and erasing operations throughout the product lifecycle.
2Adaptability or versatility
If multiple cartridges are housed in one casing with a knock mechanism, then color and function diversity is achieved, but the complexity of the device increases due to multiple separate pressure detection systems
Solution Approach 1:
The patent combines multiple pressure detection functions into a single common detection portion in the casing. This merging approach maintains the versatility of having multiple core bodies (black, red, eraser) while reducing device complexity by eliminating redundant pressure sensor systems. The single detection portion handles pressure detection for all core bodies sequentially.
Solution Approach 2:
The common pen pressure detecting portion acts as an intermediary between the multiple core bodies and the control system. Instead of each cartridge having its own direct pressure sensor, the single common detection portion mediates pressure information from any active core body, simplifying the overall system architecture while maintaining full functionality.
3Ease of manufacture
If a common pen pressure detecting portion is shared among multiple core bodies, then cost is reduced by eliminating separate pressure detection in each cartridge, but the mechanism for engaging the detection portion with different core bodies must be designed
Solution Approach 1:
The engagement mechanism is designed to automatically engage the common pen pressure detecting portion with the active core body through the knock mechanism. When a user knocks the casing to select a core body, the mechanism self-activates to position the detection portion appropriately, eliminating the need for manual adjustment or complex switching systems while maintaining cost-effectiveness.
Solution Approach 2:
The common pen pressure detecting portion is pre-positioned in the casing in a ready state before any core body is selected. The knock mechanism and engagement structure are pre-configured so that when a core body is activated, the detection portion is already in position to immediately detect pressure, eliminating the need for real-time positioning adjustments and simplifying the engagement process.
Data Source
Figure 1(A)~1(B)
Figure 2
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AI summary
To provide a constitution that reduces an economic burden on a user in a position indicator housing a plurality of core bodies within a casing and allowing selective use of a core body by a core body selecting mechanism. A plurality of core bodies are housed within a tubular casing having an opening portion on one end side. A core body selecting mechanism is provided which includes a plurality of operating portions coupled to each of the plurality of core bodies, and makes at least a tip of one core body coupled to an operated operating portion among the plurality of core bodies selectively project from the opening portion of the casing. A pen pressure detecting portion common to the plurality of core bodies is provided within the casing. When the operating portion is operated to make at least the tip of the one core body project from the opening portion, part of the operated operating portion engages with the pen pressure detecting portion common to the plurality of core bodies, and the pen pressure detecting portion detects a pen pressure applied to the tip projected from the opening portion.