EP-4736707-A1 - ROTARY DISPENSING CONTAINER

EP4736707A1EP 4736707 A1EP4736707 A1EP 4736707A1EP-4736707-A1

Abstract

Provided is a rotary dispending container capable of preventing breakage of a solid core accommodated in a shaft cylinder due to an impact applied to the shaft cylinder. The rotary dispensing container is configured so as to comprise: a screw rod 9 that advances or retracts in a shaft cylinder 3 through the relative rotation of a front shaft 1 and a rear shaft 2; and a solid core 5 that moves in the axial direction in the front shaft depending on an advancing or retracting operation of the screw rod. The solid core is accommodated in a cylindrical holder 6, and a tip part of the holder is provided with a holder guide 7 having a plurality of projections 7b extending forward in the axial direction. Selection is made between a usable state in which the solid core is projected from the front shaft as the screw rod is advanced, and an accommodation state in which the solid core is retracted together with the holder and accommodated in the front shaft as the screw rod is retracted. In the accommodation state, a tip part of the solid core projecting from the holder is supported by the plurality of projections provided to the holder guide.

Inventors

UEMURA TOMOTAKA

Assignees

MITSUBISHI PENCIL COMPANY, LIMITED

Dates

Publication Date: 20260506
Application Date: 20240628

Claims (4)

A rotary feeding container, comprising: a barrel formed of a front barrel and a rear barrel configured to be relatively rotatable; a screw rod disposed inside the rear portion of the barrel and performing a forward or backward movement in the barrel by relative rotation of the front barrel and the rear barrel; and a stick-shaped member disposed inside the front portion of the barrel and configured to move axial direction within the front barrel in response to the forward or backward movement of the screw rod, wherein the stick-shaped member is accommodated in a holder covering the outer circumference of the stick-shaped member, and a holder guide including a plurality of projections extending forward in the axial direction is provided at the tip end portion of the holder, and each is arranged along the circumferential direction, and a plurality of guide grooves extending axially is formed along the inner circumferential surface of the front shaft, into which each projection of the holder guide enters, allowing each projection to slide axially, and the front end portion of the stick-shaped member protruding from the holder is supported by the projections provided on the holder guide, during the both states in which the stick-shaped member protrudes from the front barrel in accompaniment with the forward movement of the screw rod and the stick-shaped member retracts and is stored together with the holder in the front barrel in accompaniment with the backward movement of the screw rod.
The rotary feeding container according to Claim 1, wherein the rear barrel is rotatably attached to a middle barrel mounted on the front barrel, whereby the front barrel and the rear barrel are configured to be rotatable relative to each other, and a female thread formed in the middle barrel is screwed with a male thread formed on the screw rod, and the screw rod is provided with a brim that is axially movable within the rear barrel and rotates the screw rod in the same direction in response to the rotation of the rear barrel.
The rotary feeding container according to Claim 2, wherein a rib protruding toward the axis is formed along the axial direction inside the rear barrel, and the brim formed on the screw rod is movable in the axial direction along the rib, and a part of the brim comes into contact with the rib by the rotation of the rear barrel, whereby the screw rod is configured to be rotated in the same direction in accompaniment with the rotation of the rear barrel.
The rotary feeding container according to any one of Claims 1 to 3, wherein a large-diameter portion provided with a shaft hole is formed at a front end portion of the screw rod via a shaft body formed in a linear shape, and the large-diameter portion is configured such that the stick-shaped member is projected from the front barrel by advancement of the screw rod and a pulling operation is performed to retract the holder together with the stick-shaped member, in contact with the inside of the holder, by retraction of the screw rod.

Description

Technical Field This invention relates to a rotary feeding container for stick-shaped cosmetic containers, writing instruments, and coating tools, which is used to advance stick-shaped components, such as stick-shaped cosmetics, stick-shaped writing materials, and stick-shaped coating materials from the container. Background Art Various cosmetic tools have been proposed in which, for example, a stick-shaped cosmetic is accommodated in a rotary feeding container, and a required amount of the stick-shaped cosmetic is fed from the front end portion thereof for use. Among these, in the case of solid-core eyeliners for applying cosmetics, such as to the eyebrows, it has been proposed that the cross-sectional shape of the solid core, taken in a direction perpendicular to the axial direction, is elliptical or oval. According to this structure, by changing the orientation of the solid core, the thickness of the cosmetic line applied at one time can be selected according to preference. Rotary feeding containers accommodating such solid-core eyeliners with an elliptical or oval cross-sectional shape are disclosed in Patent Literature 1 and Patent Literature 2. However, in the rotary feeding containers disclosed in Patent Literature 1 and Patent Literature 2, the solid core is configured to be advanced in only one direction. Accordingly, the solid core fed by the feeding operation cannot be returned into the barrel. The present applicant has proposed a rotary feeding container in which a fed solid core can be returned to the inside of the barrel, which is disclosed in Patent Literature 3. According to the rotary feeding container disclosed in Patent Literature 3, a screw rod that can move forward or backward by relative rotation of a rear barrel with respect to a front barrel is provided. Accordingly, the solid core is pushed out of the front barrel by the forward movement of the screw rod. The backward movement of the screw rod causes the front end portion of the screw rod to pull the holder covering the outside of the solid core, thereby retracting the solid core together with the holder into the front barrel. Citation List Patent Literature [PTL 1] Japanese Unexamined Patent Application Publication No. 2016-220916[PTL 2] Japanese Unexamined Patent Application Publication No. 2016-220917[PTL 3] Japanese Unexamined Patent Application Publication No. 2021-90729 Summary of Invention Technical Problem The solid cores accommodated in this type of rotary feeding container often contain volatile components, and even in the aforementioned solid-core eyeliner, there is a problem that the solid core hardens due to volatilization of solvents and the like, resulting in functional deterioration. Therefore, covering the outer circumference of the solid core accommodated in the aforementioned rotary feeding container with a tubular holder, as described in Patent Literature 3, is an effective countermeasure to suppress volatilization from the solid core. However, when returning the fed solid core into the front barrel, the solid core, in a state where a predetermined length of the solid core protrudes from the front end portion of the tubular holder, is retracted into the front barrel together with the holder. Accordingly, the tip portion of the solid core protruding from the holder remains in an unsupported and floating state inside the front barrel, and when an impact, such as dropping, is applied to the barrel in this state, the problem that the protruding tip portion of the solid core is broken by receiving the impact occurs. In view of such circumstances, the present invention has been made with the main object of providing a rotary feeding container capable of effectively preventing breakage of a solid core accommodated in the barrel due to impact applied to the barrel. Solution to Problem The rotary feeding container according to the present invention, which has been made to solve the above-mentioned problems, is a rotary feeding container comprises: a barrel formed of a front barrel and a rear barrel configured to be relatively rotatable; a screw rod disposed inside the rear portion of the barrel and performing a forward or backward movement in the barrel by relative rotation of the front barrel and the rear barrel; and a stick-shaped member (solid core) disposed inside the front portion of the barrel and configured to move axial direction within the front barrel in response to the forward or backward movement of the screw rod, wherein the stick-shaped member is accommodated in a holder covering the outer circumference of the stick-shaped member, and a holder guide including a plurality of projections extending forward in the axial direction is provided at the tip end portion of the holder, and each is arranged along the circumferential direction, and a plurality of guide grooves extending axially is formed along the inner circumferential surface of the front shaft, into which each projection of the holder guide enters, all