US 12,285,306 B2
Dental handpiece and dental handpiece with cleaning adapter
Shinichi Tanaka, Kanuma (JP); Tomohiro Sakanushi, Kanuma (JP); and Kohei Sekizuka, Kanuma (JP)
Assigned to NAKANISHI INC., Kanuma (JP)
Filed by NAKANISHI INC., Kanuma (JP)
Filed on Jul. 11, 2022, as Appl. No. 17/861,737.
Claims priority of application No. 2021-178835 (JP), filed on Nov. 1, 2021.
Prior Publication US 2023/0135224 A1, May 4, 2023
Int. Cl. A61C 17/22 (2006.01); A61C 17/02 (2006.01); A61C 17/20 (2006.01)
CPC A61C 17/225 (2013.01) [A61C 17/02 (2013.01); A61C 17/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A dental handpiece comprising:
a cylindrical outer body;
an insert body that includes an ultrasonic vibrator, and is configured to be accommodated in the outer body, a front end portion of the insert body closing a front end of the outer body and a rear end portion of the insert body closing a rear end of the outer body;
a tip connection portion that is provided at the front end portion of the insert body and that detachably holds a scale tip to which ultrasonic vibration from the ultrasonic vibrator is transmitted;
a cleaning liquid flow path that guides a cleaning liquid supplied from a cleaning liquid injection port of the insert body to a front end portion of the outer body; and
a housing member that is disposed inside the outer body and covers an outer side of the ultrasonic vibrator,
wherein the cleaning liquid flow path includes an immersion flow path in which the insert body is immersed in the cleaning liquid in the outer body and the cleaning liquid in which the insert body is immersed is discharged from the front end portion of the outer body, and the immersion flow path includes an inner flow path between the insert body and the housing member and an outer flow path between the housing member and the outer body.