Electronic Pen Side Switch Structure Without Cartridge Weakening
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Solution Overview
Problem
Existing electronic pens with side switches face issues such as unstable connections, reduced cartridge strength due to button protrusions, and uncomfortable operation holes, which affect usability and durability.
Innovation Solution
The electronic pen design includes a tubular outer housing with a replaceable cartridge-type electronic pen body portion, featuring a push button switch on a circuit board, a tubular body housing, and a pressing member with engagement portions to secure the side switch mechanism. The outer housing has an operation unit that presses the push button switch through the pressing member when activated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a push button switch is provided on the electronic pen cartridge, then the side switch function can be implemented, but the cartridge strength is reduced due to the need for operation holes
Solution Approach 1:
The pressing member is nested within the operation hole, with the operation hole formed in the outer housing and the pressing member mounted in the inner housing. This nested structure allows the switch mechanism to be integrated without compromising the cartridge housing strength, as the pressing force is transmitted through the nested components rather than requiring a weak opening in the cartridge itself.
Solution Approach 2:
The pressing member acts as an intermediary between the operation hole and the push button switch. It transmits the pressing force from the outer housing through the side wall to the switch, eliminating the need for a direct opening in the cartridge housing and thereby maintaining structural integrity while enabling switch operation.
2Ease of operation
If the button switch protrudes from the cartridge housing, then the switch can be operated, but it interferes with the installation of the electronic pen cartridge
Solution Approach 1:
The pressing member is nested within the operation hole rather than protruding outward. The operation hole is formed in the outer housing, and the pressing member is mounted in the inner housing, creating a flush or recessed profile that eliminates interference with cartridge installation while maintaining operational accessibility.
3Ease of operation
If the operation hole is defined in the outer housing, then the push button switch can be operated, but it causes uncomfortable feeling to users
Solution Approach 1:
The pressing member serves as an intermediary that provides a smooth, ergonomic pressing surface for the user's finger. Instead of directly pressing into the operation hole, the user presses the pressing member which then transmits the force through the side wall to the switch, eliminating the uncomfortable feeling of fingers being caught in the operation hole.
4Ease of operation
If connection between contact points is made through operation portion, then side switch function is achieved, but the connection becomes unstable
Solution Approach 1:
The pressing member acts as a stable mechanical intermediary that directly transmits pressing force to the push button switch through the side wall. This direct mechanical coupling through the pressing member provides more stable and reliable connection compared to using contact points that rely on positional alignment and electrical contact.
Data Source
AI summary
Provided is an electronic pen that includes a body portion housing of an electronic pen body portion has housed therein a refill body and a circuit board having a side switch formed by a push button switch mounted thereon, and has a pen-point opening portion through which a pen point of the refill body protrudes. A pressing member is provided in a side opening portion of the body portion housing such that the pressing member is disposed on the side switch in such a manner as to be prevented by an engagement portion from protruding outwardly from a side surface of the body portion housing. The side switch of the circuit board is operated through the pressing member of the electronic pen body portion when an operation unit of the outer housing having the electronic pen body portion installed therein is pressed.