Electronic Pen Cable Routing for Compact Housing
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Solution Overview
Problem
The integration of a short-range wireless communication unit in electronic pens poses challenges due to the need for a cable connection with the existing circuit board, leading to increased length, potential damage, and stress on the cable, which complicates housing and assembly.
Innovation Solution
The use of a flexible cable that is bent and folded back to connect the first and second circuit assemblies within the cylindrical casing, allowing for easy electrical connection while minimizing the cable's length and stress, and housing it in a designated space to prevent obstacles and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable is used to connect the existing circuit board and the short-range wireless communication unit, then electrical connection is achieved, but the cable length increases and causes inconvenience in housing
Solution Approach 1:
The cable is folded and nested within the housing space of the electronic pen, with the bent portion housed between the second circuit assembly and the casing. This nesting approach allows the cable to be contained within the existing device boundaries without extending the overall length.
Solution Approach 2:
The cable is configured to extend in multiple directions rather than a straight line, bending toward the first circuit assembly and then back toward the second circuit assembly. This multi-dimensional routing optimizes space utilization within the housing.
2Volume of stationary object
If the cable is folded and housed in the casing, then space is saved, but damage to the cable and disconnection may occur
Solution Approach 1:
The housing space is specifically designed and allocated to accommodate the bent cable portion, providing protective cushioning and preventing the cable from being subjected to excessive stress or damage during normal operation.
Solution Approach 2:
The cable is configured with flexibility to bend and fold within the housing space, allowing it to adapt to the confined space while maintaining electrical connection integrity without rigid structural constraints.
3Reliability
If a wide-width cable with multiple signal lines is used, then comprehensive electrical connection is achieved, but the cable becomes difficult to house and increases device length
Solution Approach 1:
The wide-width cable is routed through three-dimensional space within the housing, extending toward the second circuit assembly and then bending back toward the first circuit assembly. This spatial routing allows comprehensive electrical connection while accommodating the cable within the housing boundaries.
Solution Approach 2:
The multi-line cable is nested within the housing space, with its bent portion housed between circuit assemblies. This nesting contains the wide-width cable structure without extending the external dimensions of the electronic pen.
Data Source
AI summary
Disclosed herein is an electronic pen including a cylindrical casing, a first circuit assembly housed in the cylindrical casing, a second circuit assembly housed in the cylindrical casing, and a cable connected to the first circuit assembly and extending from the first circuit assembly toward the second circuit assembly. The cable includes a portion that is bent and folded back toward the first circuit assembly over the second circuit assembly and connected to the second circuit assembly. The portion of the cable that is bent and folded is housed in a housing space between the second circuit assembly and the casing when the first circuit assembly and the second circuit assembly are housed at a fixed position in the cylindrical casing.