Patent ID: 7306125
Filing Date: 2007-12-11
Classification: A61C,B05C

Abstract:
1. A dispenser for a dental viscous material comprising, a guide shaft comprising a guide member mounting part, a guide member, a first stopper ring engaging groove, a first stopper ring, a rotation knob mounting part, a second stopper ring, a spring, and a knob for rotating the guide shaft, wherein the guide member has a cylindrical part at a front side of the guide member mounting part formed at a front end of the guide shaft, and a guide part at a rear side of the guide member mounting part, in which the guide part comprises a large diameter part and a small diameter part increasing its diameter toward a rear side, wherein the first stopper ring is engaged with the first stopper ring engaging groove, which is formed at the rear side of the guide member mounting part, wherein the second stopper ring is engaged with the second stopper ring engaging groove of the rotation knob mounting part, which is formed at a rear end of the guide shaft, wherein the knob for rotating the guide shaft is freely fit to a non-circle part formed at a rear side of the second stopper ring engaging groove, and is constantly given the force for sliding in the front direction of the shaft by a spring, which is provided at a space between the second stopper ring and a rear end part of the knob, and wherein at least a portion between the rear side of the first stopper ring engaging groove and the front side of the rotation knob mounting part has a pillar shape, said dispenser also comprising, a slide block comprising a box-shaped block part, rod-like piston shafts, a release plate, and a release plate pressing spring, wherein the box shaped slide block part has a hole for the guide shaft being provided at a front side wall part and a rear side wall part, in which the guide shaft is inserted movably in this hole for the guide shaft and a projecting plate having a projected release plate supporting part on a rear face is upwardly projected from the front side wall part, and further at least an opening upper face, wherein the rod-like piston shafts are projected at positions on the both sides of the hole for the guide shaft of the front side wall part of the box-shaped block part, in the state that the axes of the shafts are in approximately parallel to a center axis of the hole for the guide shaft, wherein the release plate has an engaging hole for the guide in the space of the block part, in which the portion between the first stopper ring engaging groove of the guide shaft and the rotation knob mounting part is inserted in the engaging hole for the guide, and a distance from the upper end to the lower end of the engaging hole for the guide is longer than the diameter of this portion, and further, the release plate has the front face contacted with the rear face of the release plate supporting part of the projecting plate at the upper part thereof, and wherein the release plate pressing spring presses the release plate in the front direction so as to contact the upper end and the lower end of the engaging hole for the guide with the guide shaft in the space of the block part, said dispenser also comprising, a housing comprising a cartridge mounting part, a guide member pressing chamber, a slide block moving chamber, one pair of piston shaft guiding passages one pair of piston shaft pressing spring chambers and a lever mounting part, wherein the cartridge mounting part is provided at a front end of the housing, and this part is for mounting the cartridge storing the dental viscous material, wherein the guide member pressing chamber has a guide member supporting part, a first guide shaft supporting part and a space, wherein the guide member supporting part is formed at a rear side of the cartridge mounting part and is for constantly supporting the cylindrical part of the guide member, where the cylindrical part is supported rotatably and silidably in the axial direction, wherein the first guide shaft supporting part supports the portion between the first stopper ring engaging groove of the guide shaft and the rotation knob mounting part, where the portion is supported rotatably and silidably in the axial direction, wherein the space is formed between the guide member supporting part and the first guide shaft supporting part, and has an opening upper part, where the guide part of the guide member can be rotated and moved, wherein the slide block moving chamber has a second guide shaft supporting part at a rear end wall of the chamber, where the second guide shaft supporting part is at a rear part of the first guide shaft supporting part, and has an upper part opening to approximately full length, where the second guide shaft supporting part supports a portion between the first stopper ring engaging groove of the guide shaft and the rotation knob mounting part, and this portion is supported rotatably and slidably in the axial direction, wherein the one pair of the piston shaft guide passages is provided on the both sides of the guide member pressing chamber, slidably supports the piston shaft of the slide block in the axial direction, and penetrates from the slide block moving chamber to the cartridge mounting part, wherein one pair of the piston shaft pressing spring chambers has piston shaft pressing springs so as to contact one side ends of these springs with the piston shafts in the both piston shaft guide passages and wherein the lever mounting part is provided at the upper part of the guide member pressing chamber, and said dispenser also comprising, a lever main body comprising a lever part and a pressing piece, wherein the lever part is provided at the lever mounting part of the housing and axially supported by a lever shaft so as to be rotated at least from the position being approximately parallel to the upper face of the housing to a position where a rear part thereof has a predetermined angle with respect to the upper face of the housing, and wherein the pressing piece is projected at a lower part on the front end side of the lever part, inserted into the small diameter part at the initial position being in approximately parallel to the upper face of the housing, moved in a rear direction by a stepped part at a boundary between a small diameter part and a large diameter part of the guide part when the knob for rotating the guide shaft is rotated, rotates the lever part upwardly by the predetermined angles, is contacted with a rear face of the large diameter part of the guide part, and moves the rear face of the large diameter part in the front direction when a rear end of the lever part is pressed on the housing side.