Retractable Charging Terminal for Rechargeable Electronic Pen
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Solution Overview
Problem
Rechargeable electronic pens face issues with dust and water ingress leading to potential short circuits and natural discharge of storage elements due to exposed charging contacts, and existing solutions fail to effectively manage the exposure of charging terminals.
Innovation Solution
A rechargeable electronic pen design featuring a switch-controlled charging connection terminal that can be exposed or concealed, preventing dust ingress and short circuits by disconnecting the storage element from the charging contact when not in use, and allowing charging when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the charging contact portion is exposed from the opening portion to enable charging connection, then charging convenience is improved, but foreign matter such as dust enters and water may cause electric short circuit
Solution Approach 1:
The charging connection terminal member is designed to be movable between an exposed state (for charging) and a retracted state (for protection). The terminal can slide in and out of the opening portion, allowing dynamic adjustment between accessibility and protection, thus resolving the contradiction between charging convenience and short circuit risk.
Solution Approach 2:
The charging connection terminal member automatically performs protection function by being retractable into the opening portion when not in use. This self-service mechanism reduces the need for separate protective covers or lids, while still preventing foreign matter entry and water ingress that could cause short circuits.
2Reliability
If a lid is attached to the opening portion to prevent foreign matter entry, then protection is improved, but the attachment and removal of the lid becomes troublesome and may be a hindrance when the electronic pen is used
Solution Approach 1:
The protective function is extracted from a separate lid component and integrated into the charging connection terminal member itself. By making the terminal movable and retractable, the protection function is built into the charging mechanism, eliminating the need for separate protective lids that would complicate usage.
Solution Approach 2:
The protective function and charging function are merged into a single component - the charging connection terminal member. This component both charges the device when exposed and protects the internal components when retracted, combining multiple functions into one element to avoid the drawbacks of separate protective lids.
Data Source
AI summary
A rechargeable electronic pen includes: a casing; a storage element disposed within the casing; a charging connection terminal disposed within the casing so as to expose a charging contact to an outside of the electronic pen via an opening of the casing; a switch disposed between the storage element and the charging connection terminal; and a control member configured to perform opening and closing of the switch by being displaced with respect to the casing. The control member is displaceable with respect to the casing between first and second states. When the control member is in the first state, the switch electrically connects the storage element and charging contact; when the control member is in the second state, the switch electrically disconnects the storage element and charging contact.