also: ホチキスしん
Refers specifically to the metal staples used in a stapler (ホッチキス).
See also: 芯
I ran out of staples, so I need to buy new ones.
Standard spelling using the common trademark-derived ホッチキス and 芯 for 'core'.
Variant spelling without the small ッ; less common but still encountered.
Compound of ホッチキス (from the trademark 'Hotchkiss', a common Japanese term for a stapler) and 芯 (しん, 'core').