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    • 2. 发明申请
    • ANESTHETIC SOLUTION-FILLED CARTRIDGE-TYPE ELECTRIC DENTAL SYRINGE
    • US20140011158A1
    • 2014-01-09
    • US13997864
    • 2010-12-27
    • Akiko Kawasaki
    • Fumio TanakaMitsuhiro HaraguchiYoshihiko KawasakiMutsumi ShibuyaRenji HayashiYoshinori Kato
    • A61M5/20
    • A61M5/20A61C5/62A61C19/08A61M5/24A61M5/31511A61M2005/31518
    • Provided is an anesthetic solution-filled cartridge-type electric dental syringe, wherein the plunger has been shortened but the plunger can nevertheless be extended to the distance necessary to evacuate the anesthetic solution from the cartridge. The syringe comprises: an extension tube (11) into which a plunger (5) is movably inserted, the extension tube being movably disposed in the through hole (14) of a support block (13) and having racks (15, 15) formed in the side surface thereof that are coordinated with the racks (9) of the plunger; and a means for the plunger to draw the extension tube to engage the racks (15, 15) of the extension tube with a pinion (21) when the plunger reaches the middle of the distance corresponding to the anesthetic solution accommodation length of the cartridge. By the engagement of the racks of the extension tube with the pinion, the plunger moves together with the extension tube for the remainder of the distance corresponding to the anesthetic solution accommodation length of the cartridge.
    • 提供了一种充满麻醉剂的药筒型电动牙科注射器,其中柱塞已经被缩短,但是柱塞可以延伸到从药筒排出麻醉溶液所需的距离。 注射器包括:延伸管(11),柱塞(5)可移动地插入其中,延伸管可移动地设置在支撑块(13)的通孔(14)中,并且具有形成的齿条(15,15) 在其侧表面上与柱塞的齿条(9)配合; 以及当所述柱塞达到对应于所述药筒的麻醉剂溶液容纳长度的距离的中间时,所述柱塞用于拉伸所述延伸管以使所述延伸管的齿条(15,15)与小齿轮(21)接合的装置。 通过延伸管的齿条与小齿轮的接合,柱塞与延伸管一起移动距离对应于药筒的麻醉剂溶液容纳长度的剩余距离。