Yoshino Kogyosho Co., Ltd.

Kuraray Noritake Dental Inc.

Kazuhisa Yoshimura

Yamato Nojiri

Kotaro Fujiwara

Toru Toma

Takayuki Sunagawa

Hirotaka Horiguchi

Yusuke Fujimura

Kengo Futami

A lipstick container, including: a container main body and a cap, in which the container main body includes a middle plate body provided with a screw pin, a middle cylindrical body, an inner cylindrical body in which a spiral groove into which the screw pin screwed is formed, and an outer cylindrical body, and one of the middle plate body and the inner cylindrical body moves up to a fixed position through rotation of the outer cylindrical body, and once the one reaches the fixed position, the other of the middle plate body and the inner cylindrical body moves up through rotation of the outer cylindrical body.

Lipstick container

A trigger-type liquid sprayer in which a spring member urging an operation lever is less likely to be fatigued. A trigger-type liquid sprayer includes a sprayer main body attached to a container, an operation lever held to be swingable in a front-back direction with respect to the sprayer main body, and a spring member urging the operation lever forward. The spring member includes a fixed part that is located in front of a swing center of the operation lever and is fixed and held to the sprayer main body, and a projection that is located below the fixed part. The operation lever includes an inclined surface that is inclined upward from downward and frontward from backward and is urged by the projection abutting against the inclined surface.

Trigger-type liquid sprayer

Syringe for dental use

A dispenser can prevent leakage of contents from a nozzle tip when stopping discharging the contents. A dispenser includes: a syringe body that has a filled space of contents, and has a discharge hole at a tip thereof; a plunger that is slid in the syringe body by application of a pushing force, to discharge the contents in the filled space from the discharge hole; and a piston that is formed of an elastic material and located at a tip part of the plunger, wherein a gap is formed between an inner peripheral surface of the syringe body and an outer peripheral surface of the piston, when the plunger is pushed, the piston deforms to narrow the gap, and a back leakage risk (=(gap area/final discharge hole area)) after the deformation of the piston is 0 or more and less than 1.

Dispenser

Growing community of inventors

Tokyo, Japan

Kazuhisa Yoshimura