| 摘要 |
PURPOSE: A device for displaying the residual quantity of capsaicin injector is provided to check the residual quantity of tear liquid remaining in the tear liquid injector, which is used in suppression of a protest, by the magnetic force in a simple and easy manner. CONSTITUTION: A device for displaying the residual quantity(1) comprises a movable magnet(10) and an indicator magnet(20). The movable magnet is fixed within the inner space of a cylinder member(140) and moves up and down along with the cylinder member upon consumption of the tear liquid. The indicator magnet is adhered to the position corresponding to the movable magnet on the external side of a body by the magnetic force of the movable magnet.
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