Notebook
The writing instrument effectively addresses the challenge of utilizing broken pencil leads by using clamping pieces with a biasing mechanism to securely hold leads, ensuring stable writing and resource efficiency.
JP7917279B1Active Publication Date: 2026-09-08内田 颯輔
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Patent Information
- Application Number
- JP2026087683
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2026-05-25
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2046-05-25
AI Technical Summary
Technical Problem
Conventional writing instruments lack effective ways to utilize broken pencil leads, especially those with irregular diameters or lengths, leading to discarding and resource wastage due to difficulty in gripping and maintaining stable writing performance.
Method used
A writing instrument with a pair of clamping pieces that can securely hold broken pencil leads by closing to form a gapless contact, utilizing a biasing mechanism and a gripping part for operation, allowing for continuous use.
Benefits of technology
The solution enables reliable holding of broken pencil leads, ensuring stable writing performance even with varying diameters and lengths, promoting resource efficiency through a simple mechanical structure.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a writing instrument and lead-holding structure that can easily and reliably hold a broken pencil lead, allowing for continuous use. [Solution] A writing instrument for holding a broken pencil lead has a pair of clamping pieces for holding the lead, an openable and closable clamping part, an elastic support part that biases the clamping pieces in the closing direction, a gripping part for the user to hold, and an opening and closing mechanism for opening and closing the clamping pieces, wherein the pair of clamping pieces are configured such that when the lead is not being held, their clamping surfaces come into contact with each other so that there is no substantial gap.
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