Title:
HANDPIECE
Document Type and Number:
WIPO Patent Application WO/2021/040299
Kind Code:
A1
Abstract:
The present invention relates to a handpiece and, more particularly, to a handpiece having a rotational force transfer shaft portion, a predetermined section of which comprises multiple spokes having bending characteristics, such that a rotational force can be directly transferred from a rotational power source to a head portion solely by a single rotational force transfer shaft portion. Accordingly, the handpiece can solve problems such as rotational power loss, noise, micro vibration, durability degradation, and volume increase, which result from the gear connection structure of a conventional rotational force transfer shaft portion, which is complicated. A handpiece according to the present invention comprises: a body portion having a handle formed thereon; a head portion to which a tool is coupled; and a rotational force transfer shaft portion for transferring a rotational force from a rotational power source provided on a side of the body portion to a side of the head portion. The rotational force transfer shaft portion has a predetermined section configured as a spiral spoke portion, which has a helical-type spiral shape. Accordingly, the rotational force transfer shaft portion can independently bend toward a side of the head portion from the part on which the spiral spoke portion is formed. The rotational force transfer shaft portion extends, through the spiral spoke portion part, to a side of the head portion that deviates from the rotational center axis of the rotational power source such that the rotational force can be transferred to a side of the head portion.
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Inventors:
KIM HYUNG-WOO (KR)
Application Number:
PCT/KR2020/010860
Publication Date:
March 04, 2021
Filing Date:
August 14, 2020
Export Citation:
Assignee:
DENFLEX CO LTD (KR)
International Classes:
A61C1/18; A61C1/05; A61C1/06; A61C1/12
Foreign References:
| US20090035719A1 | 2009-02-05 | |||
| KR100513841B1 | 2005-09-09 | |||
| JP2007143786A | 2007-06-14 | |||
| JP3174146B2 | 2001-06-11 | |||
| KR101880163B1 | 2018-07-19 |
Attorney, Agent or Firm:
JEONG, Young-Su (KR)
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