Coil spring for cosmetic material and cosmetic container

Patent metadata

Field	Value
Publication number	US-9510660-B2
Application number	US-201414309289-A
Country	US
Kind code	B2
Filing date	Jun 19, 2014
Priority date	Jul 18, 2013
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A coil spring for cosmetic material is a one spring where a first spring part and a second spring part whose winding wire diameters and spring constants differ from one another are continuously and integrally formed via a stepped part. Accordingly, the use of the first spring part and the second spring part allows, for example, achieving absorbing an impact in both directions of an axial direction and sequential movements of the components constituting the cosmetic container, thus allowing providing wide variety of functions with the one spring. For example, the use of the stepped part also allows locking the component constituting the cosmetic container.

First claim

What is claimed is:

1. A cosmetic container, comprising:
a tubular-shaped container with a front portion of the container and a rear portion of the container, the rear portion of the container being mounted rotatable with respect to the front portion of the container around an axis line and immovable in an axial direction;
a movable body with a male screw at an outer peripheral part, the movable body being unrotatable around the axis line and movable in the axial direction with respect to the front portion of the container, the movable body supporting a rod-shaped cosmetic material at a tip end;
a female screw member with a female screw at an inner peripheral part, the female screw member being unrotatable with respect to the rear portion of the container around the axis line, the female screw being screwed with the male screw; and
a coil spring for cosmetic material comprising a first spring part and a second spring part that are integrally formed extending along an axial direction, the first spring part and the second spring part having different spring constants, wherein:
the first spring part and the second spring part have different winding wire diameters,
the first spring part and the second spring part are continuous via a stepped part,
the male screw and the female screw constitute a screw part, the screw part acts by relative rotation of the front portion of the container and the rear portion of the container, the relative rotation advances and retreats the movable body to cause the rod-shaped cosmetic material to appear and disappear from an opening at a tip end of the container,
the female screw member is movable in the axial direction,
any one of the first spring part or the second spring part of the coil spring for cosmetic material is configured to restrict movement in one direction of the axial direction of the female screw member, and
another of the first spring part or the second spring part is configured to restrict movement in another direction of the axial direction of the female screw member.

2. A cosmetic container, comprising:
a tube body with an opening at a tip end;
a shaft body that can advance and retreat in an axial direction inside the tube body;
an elastic tube disposed at a tip end of the tube body;
a tubular sleeve housed in the tube body and the elastic tube, the tubular sleeve that can advance and retreat in the axial direction, the sleeve including a tip end part and a lock part, the tip end part being positioned in the elastic tube, the lock part being disposed at an outer surface rear side with respect to the tip end part;
a writing brush disposed at a tip end of the shaft body, the writing brush passing an inside of the sleeve and an inside of the elastic tube, contacting a tip end of the elastic tube, and then projecting outward; and
the coil spring for cosmetic material comprising a first spring part and a second spring part that are integrally formed extending along an axial direction, the first spring part and the second spring part having different spring constants, wherein:
the first spring part and the second spring part have different winding wire diameters, the first spring part and the second spring part are continuous via a stepped part,
one of said first or second spring parts with a large spring constant is compressed between the shaft body and the lock part of the sleeve,
the other of said first or second spring parts with a small spring constant is compressed between the lock part of the sleeve and the elastic tube, and
the tip end part projects outward while sliding in contact with the tip end of the elastic tube when the tip end part of the sleeve moves forward.

3. A cosmetic container, comprising:
a tubular-shaped container with a front portion of the container and a rear portion of the container, the rear portion of the container being mounted rotatable with respect to the front portion of the container around an axis line and immovable in an axial direction;
a movable body with a male screw at an outer peripheral part, the movable body being unrotatable around the axis line and movable in the axial direction with respect to the front portion of the container, the movable body supporting a rod-shaped cosmetic material at a tip end;
a female screw member with a female screw at an inner peripheral part, the female screw member being unrotatable with respect to the rear portion of the container around the axis line, the female screw being screwed with the male screw; and
a coil spring for cosmetic material comprising a first spring part and a second spring part that are integrally formed extending along an axial direction, the first spring part and the second spring part having different spring constants, wherein:
the first spring part and the second spring part have different winding wire diameters, the first spring part and the second spring part are continuous via a stepped part,
the first spring part and the second spring part are arranged so as to surround a component constituting the cosmetic container,
a concave part is formed at a part close to a stepped part on one of said first or second spring parts, the concave part having a winding wire diameter which is smaller than that of the one of said first or second spring parts,
a lock is formed between an end part at the stepped part of the other of said first or second spring parts and the concave part, and the lock is configured to lock a convex part disposed at an outer peripheral surface of the component in an axial direction,
the male screw and the female screw constitute a screw part, the screw part acts by relative rotation of the front portion of the container and the rear portion of the container, the relative rotation advances and retreats the movable body to cause the rod-shaped cosmetic material to appear and disappear from an opening at a tip end of the container,
the female screw member is movable in the axial direction,
any one of the first spring part or the second spring part of the coil spring for cosmetic material is configured to restrict movement in one direction of the axial direction of the female screw member, and
another of the first spring part or the second spring part is configured to restrict movement in another direction of the axial direction of the female screw member.

4. A cosmetic container, comprising:
a tubular-shaped container with a front portion of the container and a rear portion of the container, the rear portion of the container being mounted rotatable with respect to the front portion of the container around an axis line and immovable in an axial direction;
a movable body with a male screw at an outer peripheral part, the movable body being unrotatable around the axis line and movable in the axial direction with respect to the front portion of the container, the movable body supporting a rod-shaped cosmetic material at a tip end;
a female screw member with a female screw at an inner peripheral part, the female screw member being unrotatable with respect to the rear portion of the container around the axis line, the female screw being screwed with the male screw; and
a coil spring for cosmetic material comprising a first spring part and a second spring part that are integrally formed extending along an axial direction, the first spring part and the second spring part having different spring constants, wherein:
the first spring part and the second spring part have different winding wire diameters, the first spring part and the second spring part are continuous via a stepped part,
a spring constant of the one of said first or second spring parts with a large winding wire diameter is larger than a spring constant of the other of said first or second spring parts with a small winding wire diameter by configuring a winding pitch of the one spring part wit

Assignees

• Tokiwa Corp

Inventors

• Ishida Yukikazu

Classifications

• A45D2040/207

  the relative movement being made by an axial action, e.g. by pushing · CPC title

• F16F1/06

  with turns lying in cylindrical surfaces · CPC title

• A45D34/042 Primary

  using a brush or the like · CPC title

• A45D40/205

  Holders for stick-shaped cosmetics whereby the stick can move axially relative to the holder (casings for lipstick A45D40/02, A45D40/06; refill sticks or moulding devices for producing sticks A45D40/16) · CPC title

• A45D40/20

  Pencil-like cosmetics; Simple holders for handling stick-shaped cosmetics or shaving soap while in use · CPC title