| 摘要 |
The present invention relates to an automatic toothbrush that can be used for cleaning one's teeth by converting elastic energy of a spiral spring into rotational energy. The present invention comprises a clutch section including a ratchet drum (5) on which a plurality of ratchets (9) are elastically mounted by a spring (10), a switch (4) which has a braking unit (7) and a stopper (8) fixedly mounted thereon, and a ratchet recess drum (6) which has a plurality of ratchet recesses (11) formed on the inner circumferential surface thereof and a plurality of stopper recesses (12) formed on the outer circumferential surface thereof; a toothbrush head driving section including a large gear (14) mounted on a second shaft (13) connected to the central portion of the ratchet recess drum (6), a small gear (16) to which a toothbrush head driving shaft (15) is fixed at one end, and a cone-shaped toothbrush head (19) with bristles having a square coupling mechanism (18) thereon; and a spiral spring winding section including a grip (20) formed on the end portion of the toothbrush body (1), a first large gear (21) coupled to the grip (20), a first small gear (22) engaged with the first large gear (21), a second large gear (23) coupled to the first small gear (22), and a second small gear (24) engaed with the second large gear (23) and rotatably mounted on the first shaft (3). |
