| 摘要 |
PURPOSE: To ensure quick and secure connection of a brush head to a brush handle with the least amount of materials, and make it possible to securely connect the brush head and brush handle of a head-exchangeable-type tooth brush whatever shapes the have, while considering the safety when the are disconnected by children. CONSTITUTION: This invention relates to a tooth brush whose brush head 22 can be disconnected to from a brush handle 24. When the brush head 22 is connected with screw on a screw pin 28, the screw pin 26 can be moved by a limited length outside the brush handle 24 against a stretch spring 32 action till a stop catch 36 of the brush head 22 fixed the brush head in rotation by fitting in the indentation 38 of the brush handle 24. During this process, the stretch spring 32 keeps the brush head 22 under the stretch toward the brush handle 24. Thus, simple and quick connection between brush handle and brush head can be established regardless of shapes of these parts. |
