JPH0242611U

JPH0242611U -

Info

Publication number: JPH0242611U
Application number: JP12306888U
Authority: JP
Priority date: 1988-09-20
Filing date: 1988-09-20
Publication date: 1990-03-23
Anticipated expiration: 2003-09-20
Also published as: JPH0612740Y2

Description

[Brief explanation of drawings]

第１図および第２図はこの考案の一実施例によ
るエアータービンハンドピースを示す作動系統図
、第３図ａ，ｂは滴水防止手段を示す拡大縦断面
図、第４図および第５図は動作を説明するための
タイミングチヤート、第６図と第９図はこの考案
の他の実施例を示す作動系統図、第７図ａ，ｂは
第６図で示す実施例の場合の構成要素である蓄水
部の拡大縦断面図、第８図は第６図で示す実施例
の場合の動作を説明するためのタイミングチヤー
ト、第１０図は第９図で示す実施例の場合の動作
を説明するためのタイミングチヤート、第１１図
ないし第１３図は第１図、第２図および第６図な
らびに第９図で示す実施例にそれぞれ対応するも
ので、給気通路および排気通路をもたないハンド
ピースの場合の作動系統図、第１４図もこの考案
のもう１つの実施例を示す作動系統である。（符号の説明）、１……治療工具、２……ハン
ドピース本体、３……給気通路、４……排気通路
、５……給水通路、６……給水開閉弁、９……給
気開閉弁、１３……排気開閉弁、１７……蓄水部
、２８……滴水防止用ポンプ。 1 and 2 are operational system diagrams showing an air turbine handpiece according to an embodiment of this invention, FIGS. 3a and 3b are enlarged longitudinal sectional views showing dripping prevention means, and FIGS. 4 and 5 are A timing chart for explaining the operation, FIGS. 6 and 9 are operation system diagrams showing other embodiments of this invention, and FIGS. 7a and b show the components for the embodiment shown in FIG. 6. An enlarged longitudinal sectional view of a certain water storage section, FIG. 8 is a timing chart for explaining the operation in the embodiment shown in FIG. 6, and FIG. 10 is an explanation of the operation in the embodiment shown in FIG. 9. The timing charts, FIGS. 11 to 13, correspond to the embodiments shown in FIGS. 1, 2, 6, and 9, respectively, and do not have an air supply passage or an exhaust passage. The operating system diagram in the case of a handpiece, FIG. 14, also shows an operating system according to another embodiment of this invention. (Explanation of symbols), 1...Treatment tool, 2...Handpiece body, 3...Air supply passage, 4...Exhaust passage, 5...Water supply passage, 6...Water supply on/off valve, 9...Air supply On-off valve, 13...exhaust on-off valve, 17...water storage section, 28...pump for preventing dripping water.

Claims

[Claims for Utility Model Registration] (1) A handpiece body 2 having a treatment tool 1 at its tip and housing a drive source for the treatment tool 1 inside.
and a water supply passage 5 that is connected to the handpiece body 2 and supplies pressurized water toward the tip thereof. Based on the input of an operation stop signal to the handpiece, the signal input is performed. A delay means that closes the on-off valve 6 installed in the water supply passage 5 after the set time t3 has elapsed, and instantaneously injects pressurized water into the water supply passage 5 from the water storage section 17 connected to the water supply passage 5. Automatically activates the water supply passage contamination prevention means, which is a water storage/discharge means for pushing out and discharging the residual water by using the water supply passage 5, and an air introduction means for temporarily introducing compressed air into the water supply passage 5 to push out and discharge the residual water. An internal contamination prevention device for a medical handpiece, characterized in that the device is configured to prevent internal contamination of a medical handpiece. (2) Claim 1 further comprising dripping prevention means that operates to apply a suction force in the water supply passage 5 in a direction opposite to the water supply direction based on an input of an operation stop signal of the water supply passage contamination prevention means. Internal contamination prevention device for the medical handpiece described. (3) The device for preventing internal contamination of a medical handpiece according to claim 1, wherein a check valve and/or a cleaning liquid supply means are provided in the middle of the water supply passage 5.