Stick-shaped cosmetic material cartridge

To improve a quality without deteriorating feeding function, a stick-shaped cosmetic material cartridge is structured such that, a rear inner tube (12) is received in an outer tube (10) to be rotatable and immobile in an axial direction, a front inner tube (13) is coupled to the rear inner tube (12) to be mobile in the axial direction and non-rotatable and is energized rearward by an energizing means (16) to be received in the outer tube (10), and a male thread (14f) of a thread stick (14) supporting a stick-shaped cosmetic material (M) and provided with the male thread (14f) is engaged with a female thread (13x) in an inner portion of the front side inner tube (13), whereby the cosmetic material (M) rises and sets smoothly and, even if an impact is applied, is well protected from being loosened off and broken.

TECHNICAL FIELD

The present invention relates to a stick-shaped cosmetic material cartridge in which a stick-shaped cosmetic material can rise and set from a cartridge.

BACKGROUND ART

Conventionally, as a stick-shaped cosmetic material feeding container, there has been known a stick-shaped cosmetic material feeding container structured such that a rear end portion of a leading tube and a front end portion of a shaft tube are connected so as to be rotatable and immovable in an axial direction, a spiral tube having a female thread in an inner portion and a plurality of axially longer protrusions in a peripheral direction in an outer portion is inward inserted to the shaft tube, a plurality of axially longer grooves provided along a peripheral direction in an inner portion of the shaft tube are engaged with the protrusions in an outer portion of the spiral tube, whereby the spiral tube is received so as to be non-rotatable and movable in the axial direction, a retractable shaft holding a rear end portion of a stick-shaped cosmetic material in a front end portion, having a male thread projection in a rear end portion and forming a noncircular shape is inward inserted to the leading tube and the spiral tube, a front end side of the noncircular retractable shaft is slidably received in a noncircular guide opening formed along the axial direction within the leading tube and coinciding with the noncircular shape of the retractable shaft, the male thread projection in the rear end portion of the retractable shaft is engaged with the female thread in the inner portion of the spiral tube, and a compression spring is arranged between the rear end surface of the leading tube and the front end surface of the spiral tube so as to press the spiral tube to a closed-end portion of the shaft tube, wherein if the leading tube and the shaft tube are relatively rotated, the retractable shaft moves forward and backward and the stick-shaped cosmetic material rises and sets with respect to the front end of the leading tube, by a rotation preventing mechanism constituted by the noncircular retractable shaft and the guide opening, and a engagement mechanism constituted by the male thread projection of the retractable shaft and the female thread of the spiral tube, and even if an impact is applied or a vibration is applied, for example, by dropping the stick-shaped cosmetic material feeding container, the spiral tube and the retractable shaft moves forward while compressing the compression spring, absorbs the impact and the vibration on the basis of the forward movement and a compression effect of the compression spring, and prevents the stick-shaped cosmetic material from being detached away from the retractable shaft and broken (for example, refer to Japanese Utility Model Publication No. 2-33703).

Further, there has been known a stick-shaped cosmetic material feeding container structured such that a feeding container feeding a stick-shaped cosmetic material is attached as a stick-shaped cosmetic material cartridge to one end side of a cylindrical container, and to the other end side, there is attached, for example, a liquid cosmetic material cartridge, a stick-shaped cosmetic material cartridge having an other stick-shaped cosmetic material than the stick-shaped cosmetic material in the one end side, an applicator or the like, thereby diversifying an intended use (for example, refer to Japanese Utility Model Publication No. 4-30961). The stick-shaped cosmetic material cartridge attached to the stick-shaped cosmetic material feeding container is structured such as to be provided with a core chuck holding the rear end portion of the stick-shaped cosmetic material in the front end portion and provided with a guide projection serving as the male thread in the rear end portion, a spiral tube provided with a spiral groove with which the guide projection of the core chuck is engaged in an inner portion, and a cartridge main body receiving the core chuck in a front side thereof so as to be non-rotatable and slidable in the axial direction, and receiving the spiral tube in a rear side thereof so as to be rotatable and immobile in the axial direction, the stick-shaped cosmetic material cartridge is attached to a coupling container so as to be rotatable and detachable (or undetachable), a projection portion (a locking portion) provided in an approximately center portion in the axial direction within the coupling container and protruding to the stick-shaped cosmetic material cartridge side is engaged with a knurled portion (a locking portion) provided in an inner portion of a rear end portion of the spiral tube on the basis of the attachment, the spiral tube is engaged with the coupling container so as to be non-rotatable and is structured such that a rotational force of the coupling container is applied thereto from a rear side thereof, the spiral tube and the cartridge main body are relatively rotated on the basis of a relative rotation of the coupling container and the cartridge main body, and the core chuck moves forward and backward and the stick-shaped cosmetic material rises and sets with respect to the front end of the cartridge main body by the rotation preventing mechanism constituted by the core chuck and the cartridge main body, and the engagement mechanism constituted by the guide projection of the core chuck and the spiral groove of the spiral tube.

DISCLOSURE OF THE INVENTION

Problem to be Solved by the Invention

Meanwhile, in recent years, a higher quality is required to the latter stick-shaped cosmetic material cartridge, and it is required to employ a mechanism absorbing the impact and the vibration to prevent the stick-shaped cosmetic material from breaking away and being broken like as the former stick-shaped cosmetic material feeding container, however, there is no stick-shaped cosmetic material cartridge employing the mechanism mentioned above.

The present invention is made for the purpose of solving the problem mentioned above, and an object of the present invention is to provide a stick-shaped cosmetic material cartridge which prevents a stick-shaped cosmetic material from being loosened off and being broken due to an impact and an operation of a vibration so as to improve a quality without deteriorating a feeding function in comparison with a prior art.

Means for Solving the Problem

In accordance with a research of the inventors of the present application, if the structure of the stick-shaped cosmetic material feeding container as described in the Japanese Utility Model Publication No. 2-33703 is simply employed for the stick-shaped cosmetic material cartridge as described in the Japanese Utility Model Publication No. 4-30961, that is, if employing the structure in which the spiral tube is received in the cartridge main body so as to be rotatable and movable in the axial direction, and the rotational force of the coupling container is applied from the rear side of the spiral tube in a state of energizing the spiral tube to the rear side by the compression spring and maintaining the engagement in the rotational direction between the locking portion of the rear end portion of the spiral tube and the locking portion of the coupling container, in the case that the impact or the vibration is applied to the stick-shaped cosmetic material feeding container to which the stick-shaped cosmetic material cartridge is attached, and the spiral tube and the core chuck move forward while compressing the compression spring, the engagement between the rear end portion of the spiral tube and the coupling container is detached, so that there is a risk that the engagement between the rear end portion of the spiral tube and the coupling container is not restored if they are shifted in the rotational direction even when the impact and the vibration end and the spiral tube is energized to the rear side by the compression spring.

Then, in accordance with the present invention, there is provided a stick-shaped cosmetic material cartridge comprising:

a thread stick supporting a rear end portion of a stick-shaped cosmetic material and provided with a male thread in an outer portion;

an inner tube provided with a female thread engaged with the male thread in an inner portion; and

an outer tube receiving the thread stick in a front side so as to be non-rotatable and slidable in an axial direction and receiving the inner tube in a rear side;

the stick-shaped cosmetic material being moved forward and backward on the basis of a relative rotation between the outer tube and the inner tube so as to rise and set with respect to a front end of the outer tube,

wherein the inner tube has a rear side inner tube which is received in the outer tube so as to be rotatable and immobile in an axial direction and is relatively rotated with the outer tube on the basis of a rotational force applied from a rear side, and a front side inner tube which has the female thread in an inner portion and is coupled to the rear side inner tube so as to be movable in the axial direction and non-rotatable and is received in the outer tube, and an energizing means for energizing the front side inner tube to a rear side is arranged between an inner portion of the outer tube and an outer portion of the front side inner tube.

In accordance with the stick-shaped cosmetic material cartridge as mentioned above, the rear side inner tube is structured such as to be received in the outer tube so as to be rotatable and immobile in the axial direction and be applied the rotational force from the rear side, the front side inner tube is structured such as to be coupled to the rear side inner tube so as to be movable in the axial direction and non-rotatable and be received in the outer tube in a state of being energized to the rear side by the energizing means, and the front side inner tube is structured such that the male thread of the thread stick supporting the rear end portion of the stick-shaped cosmetic material and provided with the male thread in the outer portion is engaged with the female thread in the inner portion of the front side inner tube. Accordingly, if the rotational force is applied to the rear side inner tube from the rear side, the rear side inner tube is relatively rotated with respect to the outer tube together with the front side inner tube, and the thread stick smoothly moves forward and backward and the stick-shaped cosmetic material well rises and sets with respect to the front end of the outer tube by the rotation preventing mechanism constituted by the inner portion in the front side of the outer tube and the thread stick, and the engagement mechanism constituted by the male thread of the thread stick and the female thread of the front side inner tube. On the other side, if the impact or the vibration is applied to the stick-shaped cosmetic material feeding container to which the stick-shaped cosmetic material cartridge is attached, the rear side inner tube is not moved in the axial direction, and accordingly maintains the state in which the rotational force is securely applied from the rear side to the rear side inner tube, and the front side inner tube moves forward against the energizing force of the energizing means together with the thread stick engaging with the front side inner tube in a state of leaving the rear side inner tube, so that the impact and the vibration are absorbed on the basis of the forward movement and a damping effect of the energizing means, and it is possible to prevent the stick-shaped cosmetic material from being loosened off from the thread stick and being broken. Further, when the impact and the vibration end, the energizing means springs the front side inner tube to move the front side inner tube backward, and the front side inner tube and the thread stick are returned to the original positions.

In this case, as the structure of the inner tube preferably achieving the effect mentioned above, in particular, there is a structure in which the front side inner tube is provided with a plurality of slits extending in the axial direction and open to the rear side along a peripheral direction, and extending walls positioned in both sides in the peripheral direction of the slits so as to form the slits and extending in the axial direction, in the rear side, the rear side inner tube is provided with a plurality of slits extending in the axial direction, open to the front side and to which the extending walls of the front side inner tube enter in the axial direction along the peripheral direction, and is provided with extending walls positioned in both sides in the peripheral direction of the slits so as to form the slits, extending in the axial direction and enters to the slits of the front side inner tube in the axial direction, and the front side inner tube is coupled to the rear side inner tube so as to be movable in the axial direction and non-rotatable by the slits and the extending walls.

Further, if the slits formed between the extending walls in the peripheral direction and the extending walls entering to the slits are formed in such a shape as to constrain deformation of the extending walls in a thickness direction, in the case that the inward deformation is constrained, it is possible to prevent an interference of the thread stick arranged in the inner side with the male thread and it is possible to secure a desired movement of the thread stick, and in the case that the outward deformation is constrained, and in the case that the energizing means such as the coil spring or the like is for example arranged in the outer side, it is possible to prevent an interference with the energizing means and it is possible to secure a desired movement.

In this case, as a preferable shape constraining the inward deformation of the extending wall, in particular, there is an approximate fan-shape in cross section, in which the inner peripheral surface and the outer peripheral surface are formed to be circular arc shaped surfaces and the outer peripheral surface is made longer than the inner peripheral surface.

Further, the structure may be made such that an annular portion coupling a front end portion of each of the extending walls in any one of the front side and rear side inner tubes along the peripheral direction is provided, and the annular portion is provided with grooves connecting to the slits of one inner tube provided with the annular portion in the axial direction and allowing the extending walls of the other inner tube to enter to the slits in the axial direction, in an inner peripheral surface. Accordingly, it is possible to securely make the extending walls of the other inner tube enter into the slits of one inner tube having the annular portion and it is possible to securely make the slits of the other inner tube into the extending walls of one inner tube having the annular portion in the axial direction, on the basis of the grooves of the annular portion. Further, each of the extending walls of one inner tube having the annular portion is reinforced by the annular portion, and the deformation of each of the extending walls in the thickness direction is well constrained.

EFFECT OF THE INVENTION

As mentioned above, in accordance with the present invention, since the stick-shaped cosmetic material well rises and sets with respect to the front end of the outer tube, and it is possible to prevent the stick-shaped cosmetic material from being loosened off and being broken due to the effect of the impact and the vibration, it is possible to improve a quality without deteriorating the feed-out function in comparison with the prior art.

BEST MODE FOR CARRYING OUT THE INVENTION

A description will be given below of a preferable embodiment of a stick-shaped cosmetic material cartridge in accordance with the present invention with reference toFIGS. 1 to 26. In this case, in each of the drawings, the same reference numerals are attached to the same elements and an overlapping description will be omitted.FIGS. 1 to 4are respective views showing a stick-shaped cosmetic material feeding container provided with a stick-shaped cosmetic material cartridge,FIGS. 5 and 6are respective views showing a first holder of a cartridge receiving container to which the stick-shaped cosmetic material cartridge is attached,FIGS. 7 to 9are respective views showing a second holder of the cartridge receiving container,FIGS. 10 and 11are respective views showing the stick-shaped cosmetic material cartridge,FIG. 12is a perspective view showing front side and rear side inner tubes and a compression coil spring,FIGS. 13 to 16are respective views showing the front side and rear side inner tubes,FIGS. 17 to 20are respective views showing the rear side inner tube, andFIGS. 21 to 26are respective views showing the front side inner tube. The stick-shaped cosmetic material feeding container provided with the stick-shaped cosmetic material cartridge in accordance with the present embodiment receives various solid stick-shaped cosmetic materials, for example, an eyeliner, an eyebrow, a lip liner or the like, and the stick-shaped cosmetic material can appropriately rise and set in accordance with necessity of a user.

As shown inFIG. 1, a stick-shaped cosmetic material feeding container100is formed in an elongated round stick shape like as a writing implement in an entire shape and has a good outer appearance. As shown inFIGS. 3 and 4, the stick-shaped cosmetic material feeding container100is provided with a stick-shaped cosmetic material cartridge1receiving a stick-shaped cosmetic material M detachably in one end side (a left side in the drawing) of a cartridge receiving container2, as shown inFIGS. 1 to 4, and is provided with an applicator holder4, to which an applicator (a chip in the present embodiment)3is attached, is provided undetachably in the other end side of the cartridge receiving container2.

The cartridge receiving container2is structured such as to have a cylindrical shaft tube5forming an outer tube, and a first holder6and a second holder7received in the shaft tube5and forming an inner tube, as shown inFIGS. 3 and 4. The first holder6is attached to one side of the shaft tube5, and the second holder7is attached to the other side of the shaft tube5.

The first holder6is made of a flexible material, for example, a synthetic resin or the like, and is structured in an approximately cylindrical shape as shown inFIGS. 5 and 6. A large-diameter collar portion6ais provided in a leading end (a left end in the drawing) in the first holder6. Further, a predetermined length of knurled portions6bfor attaching to the shaft tube5is provided thickly in line along a circumferential direction, in an outer peripheral surface in a front end side of the first holder6, and elastic locking portions6cand6care respectively provided at 180 degree symmetric positions with respect to an axis in a rear portion side thereof.

The elastic locking portions6care formed by C-shaped slots6dpierced in a peripheral wall of the first holder6, and are provided with peninsular portions6eserving as leaf springs in accordance with flexibility of a synthetic resin or the like corresponding to a molding material, and locking protruding portions6fprotruding from outer peripheral surfaces of the peninsular portions6e. Further, the first holder6is provided with an annular protruding portion6gfor locking the main body tube10of the stick-shaped cosmetic material cartridge1in the axial direction in an inner peripheral surface in a front end side thereof.

The first holder6is pressure inserted into the shaft tube5from a rear portion side thereof. As shown inFIGS. 3 and 4, the collar portion6ais brought into contact with one end surface (a left side end surface in the drawing) of the shaft tube5, the knurled portion6bis brought into pressure contact with the inner peripheral surface of the shaft tube5, and in addition, the locking protruding portions6fof the peninsular portions6eforming the leaf springs are brought into pressure contact with the inner peripheral surface of the shaft tube5so as to be locked, thereby the first holder6being attached to the shaft tube5so as to be non-rotatable and immobile in the axial direction. In this case, the locking protruding portions6fof the peninsular portions6eforming the leaf springs function for the knurled portions6bat a time when the function of the knurled portions6bweakens. Further, in this state, the peninsular portions6eare bent on the basis of the pressure contact with the inner peripheral surface of the shaft tube5, and are set in a state of protruding slightly inward from the inner peripheral surface of the first holder6.

The second holder7is made of a flexible material, for example, a synthetic resin or the like, is formed in a stepped cylindrical shape as shown inFIGS. 7 to 9, and is structured such that a rear end side (a left side in the drawing) is formed as an outer diameter small-diameter portion7y, whereby a front end side (a right side in the drawing) is formed as an outer diameter large-diameter portion7z. The second holder7is provided with a large-diameter collar portion7ain front end of the outer diameter large-diameter portion7z, and is provided with knurled portions7bhaving a predetermined length for being attached to the shaft tube5thickly inline along a circumferential direction, at a position on the rear portion side from the collar portion7aon an outer peripheral surface of the outer diameter large-diameter portion7z.

Further, the second holder7is provided with a large-diameter collar portion7cfunctioning as a disengagement prevention of the second holder7, in a rear end of the outer diameter small-diameter portion7y, and is provided with an engagement portion7dprotruding rearward on a rear end surface of the outer diameter small-diameter portion7y. The engagement portion7dis provided for engaging the inner tube12in the rear side of the stick-shaped cosmetic material cartridge1in a rotational direction (details are mentioned below), and is formed, as shown inFIGS. 7 and 9, in a shape in which a plurality of (eight in the present embodiment) protruding portions7xextending in the axial direction and having a triangular chevron cross sectional shape as shown inFIG. 8, on an outer peripheral surface of a short shaft body extending at a predetermined length in the axial direction.

Further, the second holder7is structured, as shown inFIGS. 7 and 9, such that a front end side from the collar portion7aof the outer diameter large-diameter portion is formed as an outer diameter small-diameter portion7p, and protruding portions (so-called dowel joints)7efor detachably locking the cap8in the axial direction are provided at three uniform positions in the peripheral direction on an outer peripheral surface of the outer diameter small-diameter portion7p. Further, the second holder7is provided with knurled portions7fhaving a predetermined length for engaging the applicator holder4in the rotational direction in line along the circumferential direction, on an inner peripheral surface in a front end side, as shown inFIG. 9, and is provided with an annular groove7gfor engaging the applicator holder4in the axial direction at a position at the rear portion side from the knurled portion7fon the inner peripheral surface.

The second holder7is pressure inserted to the shaft tube5from a rear portion side thereof, the collar portion7ais brought into contact with the other end surface (a right side end surface in the drawing) and the knurled portion7bis brought into pressure contact with the inner peripheral surface of the shaft tube5as shown inFIGS. 3 and 4, whereby the second holder7is attached to the shaft tube5so as to be non-rotatable and immobile in the axial direction. In this state, the inward bent portion of the peninsular portion6eof the first holder6is positioned in a front end side (a right side in the drawing) from the collar portion7cof the second holder7so as to inhibit the movement to the front end side (the right side in the drawing), and prevents the second holder7from being loosen off at a time when the function of the knurled portions7bweakens, on the basis of the bent portion and the collar portion7cof the second holder7.

Further, the applicator holder4to which the applicator3is attached is inside inserted to the second holder7, the annular protruding portion4gprovided in the outer peripheral surface of the applicator holder4is engaged with the annular groove7gof the second holder7in the axial direction, and the knurled portions4fprovided in the outer peripheral surface of the applicator holder4are engaged with the knurled portions7fof the second holder7in the rotational direction, whereby the applicator holder4is attached to the second holder7. Further, the cap8covering and protecting the applicator3is brought into contact with the protruding portions7eof the second holder7by the inner peripheral surface, thereby being detachably fitted to the second holder7.

On the other hand, the stick-shaped cosmetic material cartridge1is approximately structured, as shown inFIGS. 10 and 11, such that the stick-shaped cosmetic material cartridge1is provided with the main body tube10forming the cylindrical shape and serving as the outer tube extending in the axial direction, an inner tube11received in the main body tube10and having a female thread structuring an engagement mechanism as shown inFIG. 11, and a thread stick14received in the main body tube10, extending in the axial direction, supporting the stick-shaped cosmetic material M in a front end and having a male thread structuring an engagement mechanism, and when relatively rotating the main body tube10and the inner tube11, the thread stick14moves forward and backward and the stick-shaped cosmetic material M rises and sets with respect to the front end of the main body tube10. In this case, the stick-shaped cosmetic material M used here is constituted by a stick-shaped cosmetic material formed in an oval shape in cross section.

The main body tube10is formed in a stepped cylindrical shape, as shown inFIGS. 3 and 4, which is provided with a front end portion serving as a finger grip portion protruding from the front end of the cartridge receiving container2, and a receiving portion arranged in the front end portion via an outer peripheral step surface10a, having a small-diameter outer peripheral surface and received in the cartridge receiving container2.

The front end portion is formed in a tapered shape in which an outer diameter is narrowed gradually toward the front end, and the receiving portion is structured, as shown inFIGS. 10 and 11, such as to be provided with protruding portions (so-called dowel joints)10bfor being detachably attached to the cartridge receiving container2in the axial direction at three uniform positions in the peripheral direction on an outer peripheral surface close to the outer peripheral step surface10a, and be provided with an annular groove10cat a position between the protruding portion10band the outer peripheral step surface10a. To the annular groove10c, there is attached an O-ring15for applying a rotational resistance to a portion between the first holder6of the cartridge receiving container2and the main body tube10of the stick-shaped cosmetic material cartridge1and preventing the stick-shaped cosmetic material cartridge1within the cartridge receiving container2from being loosen in the diametrical direction.

A tube hole penetrating in the axial direction of the main body tube10is structured, as shown inFIG. 11, such that a section from a front end to a center in the axial direction is formed as an oval hole10dreceiving the oval stick-shaped cosmetic material M so as to allow to slide, and a section from an end of the oval hole10dto a rear end of the main body tube10is formed as a circular shape having a larger diameter than the oval hole. An inner peripheral step surface10eis provided in a midportion in the axial direction of the circular hole, and a rear end side via the inner peripheral step surface10eis formed to have a large diameter. The circular shaped hole having the large-diameter is provided with an annular groove10ffor engaging the rear side inner tube12constituting the inner tube11in the axial direction in a rear end portion side thereof.

Further, as shown inFIG. 4, forward and backward moving grooves10greceiving a support piece14dmentioned below of the thread stick14and allowing to slide are provided at a plurality of (four in the present embodiment) positions around the oval hole10dextending to a rear end of the oval hole10dfrom a portion near the front end of the oval hole10d, and a forward and backward moving hole10his structured by the oval holes10dand the forward and backward moving grooves10g.

The thread stick14is provided with a support portion14areceived in the oval hole10dof the main body tube10, and a shaft body portion14bmainly received in the inner tube11. The support portion14asupports a rear end portion of the stick-shaped cosmetic material M so as to move forward and backward along the forward and backward moving hole10h, and is structured, as shown inFIG. 4, such as to be provided with a base portion14chaving a short oval columnar shape and with which the rear end surface of the stick-shaped cosmetic material M is brought into contact, and support pieces14darranged at a plurality of (four in the present embodiment) positions in the peripheral direction of the outer peripheral surface of the base portion14cso as to protrude toward the leading end side and supporting an outer peripheral surface in the rear end portion of the stick-shaped cosmetic material M by pinching by inner peripheral surfaces.

The shaft body portion14bis structured, as shown inFIG. 11, such that a leading end portion is formed as a cylindrical shaft portion14e, and a portion from the shaft portion14eto a rear end is formed as a male thread14fhaving a spiral groove structuring the engagement mechanism in an outer peripheral surface thereof.

The thread stick14is structured such that a base portion14cis slidably inside inserted to the oval hole10dof the main body tube10and support pieces14dare slidably inside inserted to the forward and backward moving grooves10gof the main body tube10.

In particular, the inner tube11, which is forming a feature of the present embodiment, is provided with the inner tube12in the rear side in the axial direction and the inner tube13in the front side, as shown inFIGS. 13 to 16. These rear side and front side inner tubes12and13are made of a flexible material, for example, a synthetic resin or the like.

The front side inner tube13is formed in an approximately cylindrical shape as shown inFIGS. 21 to 26, and is provided with a pair of engagement projections structuring the engagement mechanism as female threads13xand13xin an inner peripheral surface of the front end portion, as shown inFIGS. 23,25and26. These female threads13xand13xare respectively provided at 180 degree facing positions in a peripheral direction.

As shown inFIGS. 16 and 21to25, slits13aextending in the axial direction are respectively provided at 180 degree facing positions in the peripheral direction, in the rear half portion of the front side inner tube13, as shown inFIGS. 16 and 21to25, and extending walls13band13bextending in the axial direction are respectively provided in both sides in the peripheral direction of the slits13aso as to form the slits13aand13a. The slits13aand the extending walls13bare provided so as to engage with the rear side inner tube12in the rotational direction, and the extending walls13bare formed in an approximate fan-shape in cross section, in which an inner peripheral surface and an outer peripheral surface are formed in a circular arc shape and the outer peripheral surface is made longer in comparison with the inner peripheral surface.

Further, the front side inner tube13is provided with an annular portion13ccoupling an end portion (a right side end portion in the drawing) of each of the extending walls13balong the peripheral direction, as shown inFIGS. 16,21to23and25. The annular portion13ccouples outer peripheral surfaces of the extending walls13bfrom an outer side. Accordingly, the annular portion13cis structured, as shown inFIGS. 16,22and25, such as to have grooves13dconnected to the slits13ain the axial direction and open to a rear side in an inner peripheral surface thereof. Further, the extending walls13bare positioned extendedly in both sides of the grooves13dof the annular portion13c, as shown inFIG. 22.

On the other hand, the rear side inner tube12is provided with slits12aextending in the axial direction and open to the front side at each of 180 degree facing positions in the peripheral direction, in a front side thereof, as shown inFIGS. 16 to 20, and is provided respectively with extending walls12band12bextending in the axial direction in both sides in the peripheral direction of the slits12aso as to form the slits12aand12a. The slits12aand the extending walls12bare arranged at positions having the same radius as that of the extending walls13band the slits13aof the front side inner tube13, and the extending walls12bare formed in an approximate fan-shape in cross section, in which an inner peripheral surface and an outer peripheral surface are formed in a circular arc shape and the outer peripheral surface is made longer in comparison with the inner peripheral surface, and the cross sectional shape is set equal to that of the extending walls13bof the front side inner tube13. The extending walls12bof the rear side inner tube12can be forward moved to the slits13ain the axial direction via grooves13dof the annular portion13cof the front side inner tube13, and the slits12aof the rear side inner tube12allows the extending walls13bof the front side inner tube13to move forward in the axial direction.

Further, the rear side inner tube12is provided with elastic protruding portions12cwhich can be elastically pushed open in a radial direction, in a rear end portion thereof as shown inFIGS. 17,19and20so as to protrude rearward. The elastic protruding portions12care provided for engaging with the protruding portions7xof the engagement portion7dof the second holder7in a rotational direction. The elastic protruding portions12care constituted by four pieces of protruding portions arranged at four uniform positions (positions at 90 degree interval) along the peripheral direction, and V-shaped grooves12dextending in an axial direction and to which the triangular chevron-shaped protruding portions7xof the second holder7enter, are provided in top portions toward an inner side of the protruding portion. Further, as shown inFIGS. 17 and 19, an annular protruding portion12efor engaging with the annular groove10fof the main body tube10in the axial direction is provided in an outer peripheral surface between the extending walls12band the elastic protruding portion12cin the axial direction of the rear side inner tube12.

In the rear side and front side inner tubes12and13, as shown inFIGS. 13 to 16, the extending walls12bof the rear side inner tube12move forward to the slits13athrough the grooves13dof the annular portion13cof the front side inner tube13, and the extending walls13bof the front side inner tube13move forward to the slits12aof the rear side inner tube12, thereby being coupled so as to be non-rotatable and movable in the axial direction.

Further, the inner tube11constituted by the rear side and front side inner tubes12and13is inside inserted to the main body tube10from the front side, as shown inFIG. 11, and the annular protruding portion12eof the rear side inner tube12is engaged with the annular groove10fof the main body tube10, whereby the rear side inner tube12is attached to the main body tube10so as to be rotatable and immobile in the axial direction.

In this state, the male thread14fof the thread stick14is inside inserted to the inner tube11from the front side thereof, and the male thread14fis set in an engagement state by being engaged with the female threads13xand13xof the front side inner tube13. In other words, the thread stick14is in an engaged state with the front side inner tube13.

Further, in this state, a compression coil spring16is arranged between the inner peripheral step surface10eof the main body tube10and the front side end surface of the annular portion13cof the front side inner tube13in such a manner as to surround a rear half portion of the front side inner tube13and a front half portion of the rear side inner tube12(refer toFIG. 12). The front side inner tube13is pressed against the rear side inner tube12on the basis of an energizing force of the compression coil spring16, and is set in a state of being positioned at a backward limit shown inFIG. 11.

In the case of assembling the stick-shaped cosmetic material cartridge1having the structure mentioned above, it is preferable to first outside insert the compression coil spring16from a rear side of the thread stick14, next assemble the rear side and front side inner tubes12and13such that the respective extending walls in the opposite side move forward to the respective slits, next engage the assembled inner tube12and the thread stick14surrounded by the compression coil spring16so as to screw into, next assemble them by inside inserting them from the rear side of the main body tube10, and finally insert the stick-shaped cosmetic material M from the front side of the main body tube10so as to attach to the thread stick14.

Further, the stick-shaped cosmetic material cartridge1is inside inserted to one end side opening of the cartridge receiving container2from the rear portion thereof, as shown inFIG. 3, the outer peripheral step surface10aof the main body tube10is brought into contact with the end surface of the collar portion6aof the first holder6of the cartridge receiving container2, the O-ring15and the protruding portion10bof the main body tube10are brought into contact with the inner peripheral surface of the first holder6of the cartridge receiving container2, and the annular protruding portion6gof the first holder6of the cartridge receiving container2is positioned in the front side of the protruding portion10bof the main body tube10, whereby the main body tube10is rotatably coupled to the cartridge receiving container2, and can not be moved in the axial direction with respect to the cartridge receiving container2, except a case that the stick-shaped cosmetic material M is pulled out by a predetermined force of a user, for example, a case that the stick-shaped cosmetic material M reaches an application limit and the stick-shaped cosmetic material cartridge1is required to be entirely replaced.

In a state in which the stick-shaped cosmetic material cartridge1is attached to the cartridge receiving container2, the triangular chevron-shaped protruding portions7xof the second holder7of the cartridge receiving container2move forward to and are engaged with the portions between the elastic protruding portions12cand12cof the rear side inner tube12of the stick-shaped cosmetic material cartridge1and the V-shaped grooves12dof the elastic protruding portions12c, and the rear side inner tube12and the cartridge receiving container2are coupled so as to be non-rotatable.

In the stick-shaped cosmetic material feeding container100structured as mentioned above, in the case of relatively rotating the cartridge receiving container2and the protruding portion of the main body tube10of the stick-shaped cosmetic material cartridge1from the cartridge receiving container2while holding them, since the cartridge receiving container2and the rear side inner tube12are coupled so as to be non-rotatable, the rear side inner tube12and the front side inner tube13are coupled so as to be non-rotatable, the female thread13xof the front side inner tube13and the male thread14fof the thread rod14structure the engagement mechanism, and the support pieces14dof the thread stick14and the forward and backward moving grooves10gof the main body tube10structure the rotation preventing mechanism, the thread stick14smoothly moves forward and backward, and the stick-shaped cosmetic material M protrudes from the front end of the main body tube10, whereby the application can be executed.

Further, in the stick-shaped cosmetic material feeding container100mentioned above, even if the impact and the vibration are applied, for example, due to the drop or the like of the stick-shaped cosmetic material feeding container100, since the cartridge receiving container2and the rear side inner tube12are coupled so as to be immobile in the axial direction, and the rear side inner tube12and the front side inner tube13are coupled so as to be non-rotatable and immobile in the axial direction, the rear side inner tube12does not move in the axial direction and it is accordingly possible to maintain a state in which the rotational force is securely applied to the rear side inner tube12from the rear side, the front side inner tube13moves forward while compressing the compression coil spring16against the energizing force of the compression coil spring16together with the engagement stick14engaging with the front side inner tube13in a state of leaving the rear side inner tube12, and at this time, the front side inner tube13moves forward while the extending walls13bthereof slide along the slits12aof the rear side inner tube12. Accordingly, the impact and the vibration are absorbed on the basis of the forward movement and the compressing effect of the compression coil spring16, and it is possible to prevent the stick-shaped cosmetic material M from being loosened off from the thread stick14and being broken. Further, when the impact ends, the compression coil spring16springs the front side inner tube13, the front side inner tube13moves backward while the extending walls13bthereof slide along the slits12aof the rear side inner tube12, and the front side inner tube13and the thread stick14are returned to the original positions.

As mentioned above, in the present embodiment, the stick-shaped cosmetic material M well rises and sets with respect to the front end of the main body tube10, and it is possible to prevent the stick-shaped cosmetic material M from being loosened off and being broken due to the effect of the impact and the vibration. As a result, the feeding function is not deteriorated in comparison with the prior art, and it is possible to provide the stick-shaped cosmetic material cartridge1in which the quality is improved.

Further, since the present embodiment is provided with the annular portion13ccoupling the front end portion of each of the extending walls13bof the front side inner tube13along the peripheral direction, each of the extending walls13bis reinforced by the annular portion13c, and deformation (the collapse) in the thickness direction (inward and the outward) of each of the extending walls13bis well constrained. As a result, it is possible to prevent the extending walls13band the male thread14fof the thread stick14arranged in the inner side of the extending walls13bfrom being interfered with each other, a desired motion of the thread stick14is secured, it is possible to prevent the extending walls13band the compression coil spring16arranged in the outer side of the extending walls13bfrom being interfered with each other, whereby a desired motion of the compression coil spring16is secured.

Further, since the slits13aformed between the extending walls13band13bof the front side inner tube13and the extending walls12bof the rear side inner tube12moving forward to the slits13aare formed in the shape constraining inward deformation (the collapse) of the extending walls12b, in particular, the approximate fan-shape in cross section, in which the inner peripheral surface and the outer peripheral surface are formed in the circular arc shaped surface and the outer peripheral surface is made longer in comparison with the inner peripheral surface, it is possible to prevent the male thread14fof the thread stick14arranged in the inner side of the extending walls12band the extending walls12bfrom being interfered with each other, whereby a desired motion of the thread stick14is further secured.

The description is particularly given above of the present invention on the basis of the embodiment, however, the present invention is not limited to the embodiment mentioned above. For example, in the embodiment mentioned above, the structure is made such that the annular portion13cis provided for improving the rigidity of the extending walls13bof the front side inner tube13, however, the structure may be made such that the annular portion13cof the front side inner tube13is omitted, and a similar annular portion thereto is provided so as to couple the outer peripheral surfaces of the front end portions of the extending walls12bof the rear side inner tube12in the peripheral direction, thereby improving the rigidity of the extending walls12bof the rear side inner tube12. Further, if the rigidity of the extending walls13band12bof the front side and rear side inner tubes is high, the annular portion may be omitted.

Further, in the embodiment mentioned above, the structure is made such that the inward deformation of the extending walls12bis prevented by making the slits13aand the extending walls12bin the approximate fan-shape in cross section, however, the approximate fan-shape in cross section may be inverted so as to prevent the collapse of the outer side of the extending walls12band prevent the interference with the compression coil spring16, and may be formed such that a middle portion is bulged like as beads of an abacus so as to constrain the deformation in the thickness direction (inward and outward) of the extending walls12b. In the case that the annular portion13cof the front side inner tube13is omitted and the annular portion is provided in the rear side inner tube12, the extending walls13bof the front side inner tube13is prevented from deforming inward and/or outward by the slits12aand the extending walls12bof the rear side inner tube12, and in the case that the annular portion is provided in none of the rear side and front side inner tubes12and13, the opposite side extending walls are prevented from deforming inward and/or outward by the mutual slits and extending walls.

Further, in the embodiment mentioned above, the structure is made such that, to make the stick-shaped cosmetic material cartridge1replaceable, the stick-shaped cosmetic material cartridge1is made detachable with respect to the cartridge receiving container2, however, needless to say, the stick-shaped cosmetic material cartridge1may be made non-detachable.

Further, in the embodiment mentioned above, the description is given of the application to the stick-shaped cosmetic material M in which the cross section is formed in the oval shape, however, it is, of course, possible to apply to a stick-shaped cosmetic material in which the cross section is formed in a circular shape. In this case, it is preferable to set the oval hole10dto a circular hole, and set the base portion14cof the support portion14ato a columnar shape.

Further, in the embodiment mentioned above, in order to shorten the stick-shaped cosmetic material cartridge1, the compression coil spring16is arranged between the inner portion of the main body tube10and the outer portion of the rear end portion of the front side inner tube13, that is, between the inner peripheral step surface10eof the main body tube10and the front side end surface of the annular portion13cof the front side inner tube13. However, for example, it is possible to employ a structure in which the compression coil spring16is arranged between the inner portion of the main body tube10and the front end surface of the front side inner tube13. The point is that the compression coil spring16can energize the front side inner tube13to the rear side. Further, the structure of energizing the front side inner tube13to the rear side is not limited to the compression coil spring16, but can employ an energizing means exerting approximately the same function as the compression coil spring16, for example, a resin spring constituted by a resin or the like.

In this case, the male thread of the thread stick includes an outer portion of a thread stick in which a group of intermittently arranged projections or a group of spirally and intermittently arranged projections having the same function as the thread ridges are formed. Further, the female thread of the inner tube includes an inner portion of an inner tube in which a group of intermittently arranged projections or a group of spirally and intermittently arranged projections having the same function as the thread ridges are formed.