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US 2019/0375230 A1Published application
Mechanical pencil
AssigneeKotobuki & Co., Ltd.
InventorHidehei KAGEYAMA
Life of this patent
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Abstract
A mechanical pencil according to an embodiment includes a barrel; a chuck mechanism that is housed inside the barrel and is capable of chucking and feeding out a writing lead for a mechanical pencil; and first and second cushion springs that elastically support the chuck mechanism in an axial direction with respect to the barrel, wherein a first cushioning region having a first spring constant and a second cushioning region having a second spring constant are formed by combining the first and second cushion springs, and the first and second cushioning regions are connected with no skipping.
Claims16
A mechanical pencil, including:
- a barrel;
- a chuck mechanism that is housed inside the barrel and is capable of chucking and feeding out a writing lead for a mechanical pencil;
- and
- first and second cushion springs that elastically support the chuck mechanism in an axial direction with respect to the barrel, wherein
- a first cushioning region having a first spring constant and a second cushioning region having a second spring constant are formed by combining the first and second cushion springs, and the first and second cushioning regions are connected with no skipping.
2 more elements
Dependencies are inferred from the claim text.