JPS6151806U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のハンドピースの構成図、第２図
ａ及びｂは従来のヘツド着脱機構の構成及び動作
を示す図、第３図ａ及びｂは本考案の一実施例の
構成及び動作を示す図、第４図ａ及びｂは本考案
の一実施例における一具体例の構成図、第５図ａ
及びｂは本考案の一実施例における他の具体例の
構成図、第６図は本考案の他の実施例の構成図で
ある。 １……ヘツド部、３，９……取付筒、６……シ
ヤンク部、１１……係止体、１３……袋ナツト、
１７……バネ、１９，２４，３１，３６，３９…
…平面（移動阻止手段）、２０，２５，３２，３
７，４０……斜面、２１，２６，２８，３４，３
５，３８……突起。 Figure 1 is a diagram showing the configuration of a conventional handpiece, Figures 2a and b are diagrams showing the configuration and operation of a conventional head attaching/detaching mechanism, and Figures 3a and b are diagrams showing the configuration and operation of an embodiment of the present invention. Figures 4a and 4b are block diagrams of a specific example of an embodiment of the present invention, and Figure 5a is
and b are block diagrams of other specific examples of one embodiment of the present invention, and FIG. 6 is a block diagram of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Head part, 3, 9... Mounting tube, 6... Shank part, 11... Locking body, 13... Cap nut,
17... Spring, 19, 24, 31, 36, 39...
...Plane (movement prevention means), 20, 25, 32, 3
7, 40...Slope, 21, 26, 28, 34, 3
5,38...protrusion.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] バネの伸張力に抗して袋ナツトを中心線方向に
移動させると、前記袋ナツトと係止体との係合が
解除されて、ヘツド部の取付筒をシヤンク部の取
付筒に挿脱でき、又、前記バネの伸張力によつて
前記袋ナツトを後方に付勢すると、前記袋ナツト
と係合した前記係止体が前記シヤンク部の取付筒
の内周壁面から突出して、前記ヘツド部を前記シ
ヤンク部に固定するヘツド着脱機構において、前
記シヤンクの先端部端面と前記袋ナツトの後端部
端面とのどちらか一方には、前記袋ナツトの中心
線方向の移動を阻止する手段を頂部に、前記袋ナ
ツトを円周方向に捻ると前記袋ナツトを中心線方
向に移動させる斜面を円周方向側部にそれぞれ形
設した第１の突起が中心線方向に突設され、前記
袋ナツトの後端部端面と前記シヤンクの先端部端
面とのどちらか他方には、前記第１の突起に当接
する第２の突起が突設されていることを特徴とす
るヘツド着脱機構。 When the cap nut is moved in the direction of the center line against the tension of the spring, the engagement between the cap nut and the locking body is released, and the mounting tube of the head section can be inserted into and removed from the mounting tube of the shank section. Further, when the cap nut is urged backward by the tension force of the spring, the locking body engaged with the cap nut protrudes from the inner circumferential wall surface of the mounting tube of the shank portion, and the locking body In the head attaching/detaching mechanism for fixing the cap nut to the shank portion, a means for preventing movement of the cap nut in the center line direction is provided at the top of either the end face of the tip end of the shank or the end face of the rear end of the cap nut. A first protrusion is provided on each side in the circumferential direction with a slope that moves the cap nut in the center line direction when the cap nut is twisted in the circumferential direction, and the cap nut is rotated in the center line direction. A head attaching/detaching mechanism characterized in that a second protrusion that abuts the first protrusion is provided on the other of the rear end end face and the front end face of the shank.