Cartridge-type cosmetic extrusion container

Abstract

To provide a cartridge type cosmetic extrusion container facilitating attachment of a cartridge cylinder.SOLUTION: A cartridge type cosmetic extrusion container 1 comprises: a cartridge cylinder 3; a container body 4; a push rod 8; an elastic part 10 capable of energizing the push rod 8 forward in the container body 4; and a spring 9 energizing the push rod 8 backward in the container body 4. When the cartridge cylinder 3 is removed from the container body 4, the push rod 8 moved backward by the spring 9 is energized forward by the elastic part 10, and when the cartridge cylinder 3 is attached to the container body 4 and the push rod 8 moves forward with relative rotation of an operation body 6 to the cartridge cylinder 3, forward energization by the elastic part 10 is released.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a cartridge-type cosmetic extrusion container that extrudes a cosmetic. [Background technology]

[0002] Conventionally, various types of cartridge-type cosmetic extrusion containers have been known. Japanese Patent Application Laid-Open Publication No. 7-177930 describes a cartridge-type cosmetic pressurized container. The cartridge-type pressurized container includes a cartridge that contains liquid cosmetic and a holder to which the cartridge is attached. Inside the cartridge, an applicator body that applies the cosmetic, a cosmetic storage chamber that stores the cosmetic to be supplied to the applicator body, and a piston located on the opposite side of the applicator body from the cosmetic storage chamber are provided.

[0003] A threaded rod having a guide protrusion at its rear end, a compression spring for urging the threaded rod forward, and a return spring for urging the threaded rod rearward are provided inside the holder. The compression spring is provided behind the guide protrusion, and the return spring is provided in front of the guide protrusion. When the cartridge is pulled out of the holder, the return spring returns the threaded rod to its original position. When the cartridge is attached to the holder, the compression spring urges the threaded rod forward. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 7-177930 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned cartridge-type cosmetic pressurized container, when the cartridge cylinder is removed from the holder, the position of the tip of the screw rod is determined by the forward biasing force of the compression spring and the rearward biasing force of the return spring. However, there may be individual differences in the biasing force between the compression spring and the return spring. Also, in the above-mentioned cartridge-type cosmetic pressurized container, as the screw rod advances, the compression spring expands and the return spring contracts, and as the screw rod retreats, the compression spring contracts and the return spring expands.

[0006] In this way, the compression spring and the return spring expand and contract as the screw rod advances and retreats, so that the biasing force of the compression spring and the return spring are likely to vary. If the biasing force of the compression spring and the return spring varies greatly, the position of the tip of the screw rod when the cartridge cylinder is not attached may also vary. If the position of the tip of the screw rod varies, attachment of the cartridge cylinder may become complicated. Therefore, in a cartridge-type cosmetic extrusion container, it is required that the cartridge cylinder can be easily attached.

[0007] An object of the present disclosure is to provide a cartridge-type cosmetic extruding container that allows easy attachment of a cartridge cylinder. [Means for solving the problem]

[0008] The cartridge-type cosmetic extrusion container according to the present disclosure comprises a cartridge tube containing a cosmetic, a container body to which the cartridge tube is detachably attached, and a push rod that is contained in the container body and advances inside the cartridge tube to push the cosmetic forward, a female screw is formed on the inner surface of the cartridge tube and a male screw is formed on the outer surface of the push rod, the container body includes an operating body that is rotatable relative to the cartridge tube, and a screwing action of the female screw and the male screw comes into operation as the operating body rotates relative to the cartridge tube, causing the push rod to advance and extrude the cosmetic. The cartridge-type cosmetic extrusion container comprises an elastic part that can urge the push rod forward inside the container body, and a spring that urges the push rod backward inside the container body, and when the cartridge tube is removed from the container body, the push rod that has moved rearward by the spring is urged forward by the elastic part, and when the cartridge tube is attached to the container body and the push rod advances as the operating body rotates relative to the cartridge tube, the forward urging force by the elastic part is released.

[0009] In this cartridge-type cosmetic extruding container, the cosmetic is stored in the cartridge tube, which is detachable from the container body. Therefore, when the cosmetic runs out, the cartridge tube can be removed from the container body and a new cartridge tube can be attached to the container body. Therefore, when the cosmetic runs out, the cartridge tube can be replaced, and the container body and the push rod do not need to be discarded and can be reused, so the number of parts to be discarded can be reduced. This makes it possible to provide an environmentally friendly cartridge-type cosmetic dispensing container. An elastic portion is disposed inside the container body, and the elastic portion is capable of biasing the push rod forward. When the cartridge tube is removed from the container body, the push rod is biased forward by the elastic portion. On the other hand, when the cartridge tube is attached to the container body and the push rod moves forward, the forward biasing force by the elastic portion is released. Therefore, since the elastic portion does not bias the push rod when the push rod moves forward, the length of the elastic portion can be designed to be shorter than that of a push spring that biases the push rod when the push rod moves forward. Therefore, by shortening the length of the elastic portion, the variation in the urging force of the elastic portion against the push rod can be reduced, so that the cartridge cylinder can be easily attached to the push rod.

[0010] The elastic part may be connected to the push rod. In this case, the elastic part moves together with the push rod, so that the elastic part can be easily assembled.

[0011] The elastic part may have a rotation stopper on its outer surface that engages with the inner surface of the container body in the rotational direction to rotate the push rod and the operating body synchronously. In this case, by providing the elastic part with the rotation stopper, the length of the elastic part and the rotation stopper can be shortened compared to when the rotation stopper is provided separately from the elastic part, which contributes to making the parts more compact.

[0012] The push rod and the elastic portion may be integrally formed. In this case, the number of parts of the cartridge-type cosmetic extruding container can be reduced, and therefore the cartridge-type cosmetic extruding container can be easily manufactured.

[0013] The cartridge cylinder may have a cylindrical female screw portion on which a female screw is formed. The female screw portion may have a slit communicating the inside and outside of the female screw portion, so that the female screw portion is elastically deformable in the radial direction of the female screw portion. In this case, when the cartridge cylinder is attached to the container body, the female screw portion can be elastically deformed radially inward to engage with the male screw of the push rod. Therefore, the female screw and the male screw can be easily screwed together when the cartridge cylinder is attached. Effect of the Invention

[0014] According to the present disclosure, the cartridge cylinder can be easily attached. [Brief description of the drawings]

[0015] [Figure 1] 1A is a side view of a cartridge-type cosmetic extruding container according to an embodiment, and FIG. 1B is a side view showing a state where a cap is removed from the cartridge-type cosmetic extruding container of FIG. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. [Diagram 3] 1A is a side view showing a cartridge cylinder according to an embodiment, and FIG. [Figure 4] 1A is a side view showing a relay tube of a container body according to an embodiment, and FIG. [Diagram 5] 1A is a perspective view showing a push rod according to an embodiment, and FIG. 1B is a perspective view showing an elastic portion according to an embodiment. [Figure 6] 1A is a side view showing an operating body of the container body according to the embodiment, and FIG. [Figure 7] 1 is a cross-sectional view showing a state in which the cap of the cartridge-type cosmetic extrusion container according to the embodiment has been removed and the cosmetic has been extruded. FIG. [Figure 8] FIG. 4 is a cross-sectional view showing a state before a cartridge cylinder is attached to a container main body according to the embodiment. [Figure 9]FIG. 2 is a cross-sectional view showing a state in which a cartridge cylinder is attached to a container main body according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of a cartridge-type cosmetic extrusion container according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated descriptions are omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated for ease of understanding, and the dimensional ratios and the like are not limited to those shown in the drawings.

[0017] Fig. 1(a) is a side view of a cartridge-type cosmetic extrusion container 1 according to an embodiment. Fig. 1(b) is a side view showing a state in which a cap 2 is removed from the cartridge-type cosmetic extrusion container 1. Fig. 2 is a cross-sectional view taken along line AA in Fig. 1(a). As shown in Figs. 1(a), 1(b) and 2, the cartridge-type cosmetic extrusion container 1 according to this embodiment is, for example, a pencil-type container that extrudes cosmetic M contained in a cartridge tube 3 by the user's operation.

[0018] The cosmetic M is, for example, an eyebrow, an eyeliner, a lip liner, a lipstick, a lip gloss, a cosmetic stick, or a concealer. The cosmetic M is, for example, volatile. The cosmetic M may be a soft rod-like material (e.g., semi-solid, soft, gelatinous, mousse-like, or a paste-like material containing these). For example, the cosmetic M may be a thin rod-like material having an outer diameter of 1.5 mm or less, a general rod-like material having an outer diameter of 1.5 mm or more and 3.0 mm or less, or a thick rod-like material having an outer diameter of 3.0 mm or more.

[0019] The cartridge-type cosmetic extruding container 1 includes a cap 2, a cartridge cylinder 3 in which a cosmetic M is stored, and a container body 4 to which one end of the cartridge cylinder 3 in the axial direction D1 is attached. In the present disclosure, the "axis" refers to the axis of the cylindrical body, which is the center line of the cartridge-type cosmetic extruding container extending along the longitudinal direction of the cartridge-type cosmetic extruding container. The "axial direction" refers to the direction in which the axis of the cartridge-type cosmetic extruding container extends (the direction along the axis). The "axial direction" is, for example, the longitudinal direction of the cartridge-type cosmetic extruding container.

[0020] "Front", "front side" and "forward" refer to the direction from the container body toward the cartridge barrel in the axial direction, and "rear", "rear side" and "rearward" refer to the direction from the cartridge barrel toward the container body in the axial direction. "Radial direction" refers to the direction perpendicular to the axis, and "rotational direction" refers to the direction along a ring centered on the axis (e.g., the circumferential direction). In this embodiment, the extrusion direction of the cosmetic M is the forward direction, and the opposite direction is the rearward direction.

[0021] In this embodiment, the container body 4 has an intermediate cylinder 5 to which the cartridge cylinder 3 is attached, and an operating body 6 that engages with the intermediate cylinder 5 so as to be rotatable relative to the intermediate cylinder 5. The cartridge-type cosmetic extrusion container 1 is used by removing the cap 2 and relatively rotating the cartridge cylinder 3 and the container body 4 (operating body 6) in one direction to extrude the cosmetic M from the cartridge cylinder 3. In this embodiment, the operating body 6, which is a part of the container body 4, is rotated in one direction relative to the cartridge cylinder 3. The cap 2 includes a cylindrical outer cap 2A with a bottom, and a cylindrical stepped inner cap 2B that is held at the bottom of the outer cap 2A.

[0022] For example, the outer cap 2A is made of PP (polypropylene), and the inner cap 2B is made of TPEE (polyester thermoplastic elastomer). The outer cap 2A has an annular recess 2b and an annular protrusion 2c on its inner surface. The outer cap 2A is a portion into which the cartridge tube 3 is inserted. The outer cap 2A has an inner peripheral surface 2d, and a recess 2f with which the cartridge tube 3 engages is formed on the inner peripheral surface 2d.

[0023] The inner cap 2B has an annular protrusion 2g on its outer peripheral surface, and the annular protrusion 2g passes over the annular protrusion 2c and fits into the annular recess 2b, thereby fixing the inner cap 2B to the outer cap 2A. The inner cap 2B is provided to ensure airtightness of the cosmetic M located inside the cartridge cylinder 3 to which the cap 2 is attached. The inner cap 2B has a cylindrical insertion portion 2h into which the cartridge cylinder 3 is inserted.

[0024] Inside the cartridge cylinder 3, there are disposed a piston 7 for pushing the cosmetic M forward, and a push rod 8 having a male screw 8b on its outer surface for moving the piston 7 forward. The push rod 8 is disposed inside the container body 4 so as to extend in the axial direction D1, and moves forward inside the cartridge cylinder 3. Fig. 3(a) is a side view showing the cartridge cylinder 3. Fig. 3(b) is a cross-sectional view taken along line BB in Fig. 3(a). As shown in Figs. 2, 3(a) and 3(b), the cartridge cylinder 3 includes a front cylinder portion 3A that is exposed when the cap 2 is removed, a rear cylinder portion 3B that is inserted inside the relay cylinder 5, and a flange portion 3C that is interposed between the front cylinder portion 3A and the rear cylinder portion 3B.

[0025] For example, the cartridge barrel 3 is made of PE (polyethylene). The front barrel portion 3A has an opening 3b located at one end in the axial direction D1, and a tapered surface 3c that inclines so that the cartridge barrel 3 expands in diameter with increasing distance from the opening 3b. The opening 3b is a portion of the cartridge barrel 3 where the cosmetic material M is exposed, and the cosmetic material M protrudes from the opening 3b for use. The tapered surface 3c extends, for example, from the opening 3b to a position beyond the center of the cartridge barrel 3 in the axial direction D1.

[0026] The front cylinder portion 3A has a protrusion 3d located on the rear side of the tapered surface 3c, an inclined surface 3f located behind the protrusion 3d and inclined so that the cartridge cylinder 3 expands in diameter toward the rear, and a protrusion 3g extending in the axial direction D1 behind the inclined surface 3f. The front cylinder portion 3A has, for example, a plurality of protrusions 3d aligned along the rotation direction D2 of the cartridge cylinder 3. Each of the plurality of protrusions 3d engages with a recess 2f of the cap 2 in the axial direction D1. The protrusions 3d have, for example, a circular shape.

[0027] The front cylinder portion 3A has multiple protrusions 3g, which are aligned along the rotation direction D2 of the cartridge cylinder 3. The protrusions 3g engage with the inner surface of the cap 2, and the cap 2 is attached to the cartridge cylinder 3 in a state in which the end surface 2j that forms the opening of the cap 2 faces the flange portion 3C along the axial direction D1. The flange portion 3C is exposed when the cap 2 is attached to the cartridge cylinder 3.

[0028] The internal space 3h of the cartridge barrel 3 extends rearward from the opening 3b. The internal space 3h penetrates the cartridge barrel 3 in the axial direction D1. The internal space 3h accommodates the cosmetic M, the piston 7, and the push rod 8. The piston 7 has, for example, a first recess 7b recessed at the front end and a second recess 7c recessed at the rear end. The cosmetic M fits into the first recess 7b, and the push rod 8 fits into the second recess 7c. The cosmetic M, the piston 7, and the push rod 8 are arranged in this order. The internal space 3h includes a first internal space 3j in which the cosmetic M and the piston 7 are accommodated, and a second internal space 3k in which the push rod 8 fits behind the first internal space 3j.

[0029] For example, the inner surface of the cartridge barrel 3 that defines the first internal space 3j and the inner surface of the cartridge barrel 3 that defines the second internal space 3k are smooth surfaces. For example, the inner diameter of the second internal space 3k is larger than the inner diameter of the first internal space 3j. A female screw portion 3D is formed on the rear side of the second internal space 3k, where a female screw 3m that screws onto the male screw 8b of the push rod 8 is formed. The male screw 8b and the female screw 3m form a screwing portion T that generates a screwing action that advances the push rod 8 relative to the cartridge barrel 3.

[0030] The rear cylinder portion 3B includes an annular recess 3p located behind the flange portion 3C, an annular protrusion 3q located behind the annular recess 3p, and a male screw 3r extending rearward from the annular protrusion 3q. The annular recess 3p, the annular protrusion 3q, and the male screw 3r are portions that are attached to the container body 4. Specifically, the male screw 3r is screwed into the container body 4 and the annular protrusion 3q engages with the container body 4 in the axial direction D1, whereby the cartridge cylinder 3 is attached to the container body 4.

[0031] The female screw portion 3D extends rearward from the portion of the cartridge barrel 3 where the male screw 3r is formed. The female screw portion 3D has a cylindrical shape. The female screw portion 3D has a slit 3s that communicates the inside and outside of the female screw portion 3D, and a protrusion 3w that protrudes radially outward from the female screw portion 3D. For example, the female screw portion 3D has two slits 3s and two protrusions 3w, and the slits 3s and the protrusions 3w are formed on one side and the other side of the female screw portion 3D in the radial direction, respectively. In this case, the cartridge barrel 3 can be more stably attached to the container body 4. However, the number of the slits 3s and the protrusions 3w may be one or three or more, and is not particularly limited.

[0032] For example, the slit 3s has a U-shape. The slit 3s includes a pair of first slit portions 3t extending in the axial direction D1 and aligned along the rotational direction D2, and a second slit portion 3v connecting the ends of the pair of first slit portions 3t in the axial direction D1. The second slit portion 3v extends in the rotational direction D2 between the rear ends of the pair of first slit portions 3t. The inside of the U-shaped region of the slit 3s (the portion between the pair of first slit portions 3t) is elastically deformable in the radial direction of the cartridge tube 3, and a protrusion 3w is formed in this elastically deformable region. The protrusion 3w engages with the container body 4 in the axial direction D1. The protrusion 3w protrudes radially outward of the cartridge tube 3 between the pair of first slit portions 3t.

[0033] The female screw portion 3D has a female screw 3m on its inner surface. The female screw 3m is formed, for example, between the pair of first slit portions 3t (inside the protrusion 3w). As described above, the area between the pair of first slit portions 3t is elastically deformable in the radial direction of the cartridge barrel 3, and therefore the female screw 3m is displaceable in the radial direction of the cartridge barrel 3.

[0034] The cartridge cylinder 3 configured as described above is replaceable with respect to the container body 4. Specifically, when the cosmetic material M runs out due to use, for example, the cartridge cylinder 3 can be removed from the container body 4 and a new cartridge cylinder 3 filled with the cosmetic material M can be attached to the container body 4. The attachment of the cartridge cylinder 3 to the container body 4 will be described in detail later.

[0035] Next, the container body 4 will be described. Fig. 4(a) is a side view showing the relay tube 5 of the container body 4. Fig. 4(b) is a cross-sectional view taken along line CC in Fig. 4(a). As shown in Figs. 2, 4(a) and 4(b), the push rod 8, a spring 9 for urging the push rod 8 rearward, and an elastic part 10 for urging the push rod 8 forward are housed inside the container body 4. For example, the elastic part 10 constitutes the rear part of the push rod 8, and the spring 9 is interposed between the rear part of the push rod 8 and the relay tube 5 to urge the push rod 8 rearward.

[0036] The relay tube 5 is made of, for example, PP. The relay tube 5 has a cylindrical shape. For example, the outer surface 5b of the relay tube 5 is a smooth surface without any steps. The relay tube 5 has a first internal space 5c into which the cartridge tube 3 is inserted and a second internal space 5d into which the operating body 6 is inserted. In the first internal space 5c, an annular convex portion 5k protruding radially inward of the relay tube 5 behind an opening 5j located at the front end of the relay tube 5, an annular concave portion 5m recessed radially outward of the relay tube 5 behind the annular convex portion 5k, and a female screw 5h into which the male screw 3r of the cartridge tube 3 is screwed behind the annular concave portion 5m are formed. On the rear side of the female screw 5h in the first internal space 5c, a first smooth surface 5p, an inclined surface 5q inclined so that the first internal space 5c is reduced in diameter behind the first smooth surface 5p, and a second smooth surface 5r located behind the inclined surface 5q are formed. The first smooth surface 5p, the inclined surface 5q and the second smooth surface 5r are portions into which the female screw portion 3D of the cartridge cylinder 3 fits.

[0037] The relay tube 5 includes a partition wall 5f located between the first internal space 5c and the second internal space 5d. The partition wall 5f is located behind the second smooth surface 5r. A through hole 5g is formed in the partition wall 5f, penetrating in the axial direction D1, and the push rod 8 is inserted through the through hole 5g. The inner diameter of the through hole 5g is smaller than the inner diameter of the first internal space 5c and the inner diameter of the second internal space 5d. A protrusion 5s is formed in the second internal space 5d, with which the operating body 6 engages in the rotational direction D2.

[0038] The relay cylinder 5 has, for example, a plurality of protrusions 5s arranged along the rotation direction D2. The protrusions 5s constitute one side of a ratchet mechanism R that allows the operating body 6 to rotate relative to the cartridge cylinder 3 in one direction and restricts the operating body 6 from rotating relative to the cartridge cylinder 3 in the opposite direction (the opposite direction to the one direction). The one direction corresponds to the advancing direction in which the cosmetic M is advanced (pushed out) by the forward movement of the push rod 8 and the piston 7.

[0039] The protrusion 5s has, for example, an inclined surface 5s1 extending from an inner surface 5t of the relay tube 5 in a direction inclined with respect to the radial direction of the relay tube 5, a top surface 5s2 located radially inside the inclined surface 5s1, and a wall surface 5s3 extending from the top surface 5s2 to the inner surface 5t. For example, rotation of the operating body 6 in a direction (one direction) from the inclined surface 5s1 toward the wall surface 5s3 is permitted, but rotation of the operating body 6 in a direction (opposite direction) from the wall surface 5s3 toward the inclined surface 5s1 is restricted.

[0040] Behind the protrusion 5s in the second internal space 5d, an annular recess 5v and an annular protrusion 5w located behind the annular recess 5v are formed. An opening 5x into which the operating body 6 is inserted is formed at the rear end of the second internal space 5d. The annular recess 5v and the annular protrusion 5w are portions into which the operating body 6 inserted from the opening 5x into the second internal space 5d engages in the axial direction D1. The operating body 6 engages with the relay tube 5 in the axial direction D1 and is engaged so as to be rotatable only in one direction (unrotatable in the opposite direction).

[0041] Fig. 5(a) is a perspective view showing the push rod 8. Fig. 5(b) is a perspective view showing the elastic part 10 capable of biasing the push rod 8 forward. As shown in Figs. 2, 5(a) and 5(b), for example, the elastic part 10 is connected to the push rod 8. That is, the elastic part 10 is continuous with the rear part of the push rod 8. The push rod 8 has a male screw 8b, a first columnar part 8c that abuts against the piston 7, and a second columnar part 8d that extends rearward from the male screw 8b.

[0042] The push rod 8 is made of, for example, PE. The male screw 8b extends rearward from the first columnar portion 8c. The male screw 8b is screwed into the female screw 3m of the cartridge cylinder 3. The outer surfaces of the first columnar portion 8c and the second columnar portion 8d are smooth. The first columnar portion 8c is a portion that enters the second recess 7c of the piston 7 to press the piston 7 forward. The second columnar portion 8d extends in the axial direction D1 between the male screw 8b and the elastic portion 10.

[0043] The elastic part 10 is made of, for example, PE. The elastic part 10 is housed in the operating body 6. For example, the elastic part 10 is molded integrally with the push rod 8. The elastic part 10 includes a first rotation stopper 11 having a diameter larger than that of the push rod 8, an elastically deformable spring part 12, and a second rotation stopper 13 located behind the spring part 12. The first rotation stopper 11 and the second rotation stopper 13 function as rotation stoppers for the operating body 6. As a result, the elastic part 10 engages with the operating body 6 so as to be synchronously rotatable (non-rotatable).

[0044] The first rotation stopper 11 has a plurality of large diameter portions 11b having a diameter larger than the diameter of the push rod 8, and recesses 11c located between the plurality of large diameter portions 11b. The first rotation stopper 11 has, for example, a plurality of large diameter portions 11b and a plurality of recesses 11c, and the large diameter portions 11b and the recesses 11c are alternately arranged along the rotation direction D2. As an example, the first rotation stopper 11 has four large diameter portions 11b and four recesses 11c. The large diameter portions 11b and the recesses 11c engage with the inner surface of the operating body 6 in the rotation direction D2, whereby the elastic portion 10 engages with the operating body 6 so as to be synchronously rotatable.

[0045] The spring 9 abuts against the front end of the first rotation stopper 11. That is, the first rotation stopper 11 functions as a flange against which one end (rear end) of the spring 9 abuts. The spring 9 is disposed between the first rotation stopper 11 and the partition wall 5f of the relay tube 5, and biases the elastic portion 10 backward relative to the relay tube 5.

[0046] The spring portion 12 has a cylindrical shape in which a slit 12b is formed to communicate the inside and outside of the spring portion 12. The spring portion 12 has, for example, a cylindrical shape. The slit 12b includes a pair of first slit portions 12c extending in the rotation direction D2 and a second slit portion 12d whose position in the rotation direction D2 is different from that of the pair of first slit portions 12c. The spring portion 12 has a plurality of first slit portions 12c (for example, two pairs, total of four) and a plurality of second slit portions 12d, and the pair of first slit portions 12c and the pair of second slit portions 12d are alternately arranged along the axial direction D1. By forming the first slit portions 12c and the second slit portions 12d in this manner, the spring portion 12 can exert a biasing force in the axial direction D1 while maintaining a moderate strength. That is, the spring portion 12 is deformable in the axial direction D1, and generates a forward biasing force on the push rod 8 when pressed in the axial direction D1.

[0047] The second rotation stopper 13 includes an outer peripheral surface 13b extending rearward from the spring portion 12, and a plurality of protrusions 13c protruding from the outer peripheral surface 13b toward the radially outer side of the elastic portion 10. The plurality of protrusions 13c are aligned along the rotation direction D2 of the elastic portion 10, and a concave portion is formed between a pair of protrusions 13c aligned along the rotation direction D2. This concave portion and the protrusions 13c engage with the inner surface of the operating body 6 in the rotation direction D2, whereby the elastic portion 10 engages with the operating body 6 so as to be synchronously rotatable.

[0048] Fig. 6(a) is a side view showing the operating body 6. Fig. 6(b) is a cross-sectional view taken along line DD in Fig. 6(a). As shown in Figs. 6(a) and 6(b), the operating body 6 is a bottomed cylindrical shape having a bottom 6q. The operating body 6 includes a ratchet tube portion 6A located at the front side, a tube portion 6B extending rearward from the ratchet tube portion 6A, and a large diameter portion 6C extending rearward from the rear end of the tube portion 6B. The ratchet tube portion 6A and the tube portion 6B are portions inserted into the relay tube 5, and the large diameter portion 6C is an exposed portion.

[0049] The operating body 6 is made of, for example, PE. The ratchet tube portion 6A extends from the tube portion 6B to the opposite side to the large diameter portion 6C, and for example, the diameter of the ratchet tube portion 6A is smaller than the diameter of the tube portion 6B. The ratchet tube portion 6A has a protrusion 6b that elastically deforms in the radial direction of the operating body 6. For example, the ratchet tube portion 6A has two protrusions 6b. The protrusions 6b constitute the other side of the ratchet mechanism R that allows the operating body 6 to rotate relative to the cartridge tube 3 in one direction and restricts relative rotation in the opposite direction. The protrusions 6b are movable in one direction relative to the protrusions 5s of the relay tube 5 and are not movable in the opposite direction.

[0050] The ratchet tube 6A has a slit 6c formed to surround the protrusion 6b. For example, the ratchet tube 6A has two slits 6c and two protrusions 6b aligned along the radial direction of the ratchet tube 6A. The slits 6c are U-shaped. The slits 6c include a pair of first slits 6d extending in the rotational direction D2 and aligned along the axial direction D1, and a second slit 6f connecting the pair of first slits 6d to each other. The protrusions 6b protrude radially outward in an inner region (a region between the pair of first slits 6d) of the U-shaped portion of the slit 6c. In this way, the region where the protrusions 6b between the pair of first slits 6d are formed is elastically deformable in the radial direction of the operating body 6, and the protrusions 6b are accordingly displaceable in the radial direction of the operating body 6.

[0051] The cylindrical portion 6B has a stepped cylindrical shape. The cylindrical portion 6B has an inclined surface 6g that inclines so that the operating body 6 expands in diameter from the rear end of the ratchet cylindrical portion 6A, an annular protrusion 6h located behind the inclined surface 6g, and an expanded diameter portion 6j located behind the annular protrusion 6h. Between the annular protrusion 6h and the expanded diameter portion 6j, an annular recess 6k that is recessed relatively to the annular protrusion 6h and the expanded diameter portion 6j is formed. The annular protrusion 6h and the annular recess 6k engage with the annular recess 5v and the annular protrusion 5w of the relay tube 5, respectively. As a result, the operating body 6 engages with the relay tube 5 in the axial direction D1.

[0052] An internal space 6m is formed inside the operating body 6, into which the elastic part 10 and the push rod 8 are inserted. A protrusion 6p with which the elastic part 10 engages in the rotation direction D2 is formed in the internal space 6m. The protrusion 6p is formed, for example, inside the cylindrical part 6B and the large diameter part 6C. The operating body 6 has a plurality of protrusions 6p, each of which extends along the axial direction D1. The protrusion 6p is a portion that engages with each of the first rotation stopper 11 and the second rotation stopper 13 of the elastic part 10 in the rotation direction D2. The protrusion 6p engages with the recess 11c and the recessed portion between the pair of protrusions 13c, so that the elastic part 10 engages with the operating body 6 in the rotation direction D2.

[0053] Next, an example of how to use the cartridge-type cosmetic extrusion container 1 will be described. First, in the initial state shown in Fig. 2, the cap 2 is removed from the cartridge cylinder 3. Then, the container body 4 is rotated in one direction relative to the cartridge cylinder 3. In this embodiment, the operating body 6 is rotated in one direction relative to the cartridge cylinder 3 and the relay cylinder 5. As a result of this relative rotation, the operating body 6, the elastic portion 10, and the push rod 8 rotate relative to the cartridge cylinder 3, causing the male screw 8b and the female screw 3m (threaded portion T) to engage with each other, and the push rod 8 advances relative to the cartridge cylinder 3.

[0054] As shown in Figures 2 and 7, when the push rod 8 advances, the piston 7 and the cosmetic M advance relative to the cartridge barrel 3, and as the push rod 8 advances, the cosmetic M protrudes from the opening 3b of the cartridge barrel 3 for use. Figure 7 is a cross-sectional view showing the push rod 8 at its limit of advance. When the push rod 8 advances, the elastic part 10 located on the rear side of the push rod 8 does not bias the push rod 8, and the forward biasing force of the elastic part 10 is released. In other words, the elastic part 10 advances together with the push rod 8 without biasing the push rod 8. After the cosmetic M is used up by continuing to use the cosmetic M, the cartridge barrel 3 is replaced with respect to the container body 4. The procedure for replacing the cartridge barrel 3 will be described below.

[0055] First, as shown in Fig. 7, when the push rod 8 advances, the spring 9 interposed between the partition wall 5f of the relay tube 5 and the elastic part 10 contracts. When the cartridge tube 3 is removed from the container body 4 in this state, the male screw 8b is released from the female screw 3m, and the contracted spring 9 expands and urges the elastic part 10 and the push rod 8 backward, as shown in Fig. 8. The backward urging force of the spring 9 moves the elastic part 10 and the push rod 8 backward, and the elastic part 10 approaches or comes into contact with the bottom part 6q of the operating body 6.

[0056] When a new cartridge cylinder 3 is attached to the container body 4 with the elastic portion 10 approaching or abutting the bottom portion 6q, the female screw portion 3D of the cartridge cylinder 3 fits into the first smooth surface 5p, the inclined surface 5q, and the second smooth surface 5r of the container body 4 (relay cylinder 5) as shown in Fig. 9. The inner diameter of the female screw 3m of the female screw portion 3D is larger than, for example, the outer diameter of the male screw 8b of the push rod 8 when no external force is applied to the female screw portion 3D.

[0057] However, when the female screw portion 3D enters the rear side of the inclined surface 5q, the protrusion 3w abuts against the inclined surface 5q and the female screw portion 3D bends radially inward, whereby the female screw 3m of the female screw portion 3D is screwed into the male screw 8b of the push rod 8. In this way, by having the female screw portion 3D (protrusion 3w) enter the rear side of the inclined surface 5q, the female screw 3m is screwed into the male screw 8b, and the cartridge cylinder 3 can be attached to the container body 4, so that a new cartridge cylinder 3 can be efficiently attached to the container body 4.

[0058] Next, the effects obtained from the cartridge-type cosmetic extrusion container 1 according to this embodiment will be described in detail. In the cartridge-type cosmetic extrusion container 1, the cosmetic M is stored in the cartridge tube 3, which is detachable from the container body 4. Therefore, when the cosmetic M runs out, the cartridge tube 3 can be removed from the container body 4 and a new cartridge tube 3 can be attached to the container body 4. Therefore, when the cosmetic M runs out, the cartridge tube 3 can be replaced, and the container body 4 and the push rod 8 do not need to be discarded and can be reused, so the number of parts to be discarded can be reduced. Therefore, the cartridge-type cosmetic extrusion container 1 can be made environmentally friendly.

[0059] An elastic part 10 is disposed inside the container body 4, and the elastic part 10 is capable of biasing the push rod 8 forward. When the cartridge tube 3 is removed from the container body 4, the push rod 8 is biased forward by the elastic part 10. Specifically, when the push rod 8 is pushed backward, the elastic part 10, which is close to or in contact with the bottom part 6q of the operating body 6, bends and biases the push rod 8 forward. On the other hand, when the cartridge tube 3 is attached to the container body 4 and the push rod 8 moves forward, the biasing force of the elastic part 10 to the forward direction is released. Therefore, since the elastic part 10 does not bias the push rod 8 when the push rod 8 moves forward, the length of the elastic part 10 can be designed to be shorter than that of a push spring that biases the push rod when the push rod moves forward. Therefore, by being able to shorten the length of the elastic part 10, the variation in the biasing force of the elastic part 10 against the push rod 8 can be reduced, and the cartridge tube 3 can be easily attached to the push rod 8.

[0060] In this embodiment, the elastic part 10 is connected to the push rod 8. In this case, since the elastic part 10 moves together with the push rod 8, the assembly of the elastic part 10 can be easily performed.

[0061] In this embodiment, the elastic part 10 has on its outer surface a rotation stopper (e.g., a first rotation stopper 11 and a second rotation stopper 13) that engages with the inner surface of the container body 4 in the rotation direction D2 to synchronously rotate the push rod 8 and the operating body 6. In this case, by providing the elastic part 10 with the rotation stopper, the length of the elastic part 10 and the rotation stopper can be shortened compared to a case in which the rotation stopper is provided separately from the elastic part 10. This contributes to making the parts more compact.

[0062] In this embodiment, the push rod 8 and the elastic portion 10 are integrally molded. In this case, the number of parts of the cartridge-type cosmetic extruding container 1 can be reduced, so that the cartridge-type cosmetic extruding container 1 can be easily manufactured.

[0063] In this embodiment, the cartridge cylinder 3 may have a cylindrical female screw portion 3D on which a female screw 3m is formed. The female screw portion 3D has a slit 3s that communicates the inside and outside of the female screw portion 3D, and is thus elastically deformable in the radial direction of the female screw portion 3D. In this case, when the cartridge cylinder 3 is attached to the container body 4, the female screw portion 3D can be elastically deformed radially inward to engage the female screw 3m with the male screw 8b of the push rod 8. Therefore, when the cartridge cylinder 3 is attached, the female screw 3m and the male screw 8b can be easily screwed together.

[0064] The above describes the embodiment of the cartridge-type cosmetic extrusion container according to the present disclosure. However, the cartridge-type cosmetic extrusion container according to the present disclosure is not limited to the above embodiment, and may be modified within the scope of the gist described in each claim and may be used for other purposes. In other words, the shape, size, number, material, and arrangement of each part constituting the cartridge-type cosmetic extrusion container may be appropriately changed within the scope of the above gist.

[0065] For example, in the above-mentioned embodiment, a cylindrical operating body 6 has been described. However, the shape of the operating body may be a shape other than cylindrical, and is not particularly limited. Also, in the above-mentioned embodiment, an example has been described in which the operating body 6, which is a part of the container body 4, rotates in one direction relative to the cartridge cylinder 3. In this way, the cartridge-type cosmetic extrusion container according to the present disclosure may be one in which a part of the container body rotates in one direction relative to the cartridge cylinder. Also, the cartridge-type cosmetic extrusion container according to the present disclosure may be one in which the entire container body rotates relative to the cartridge cylinder.

[0066] In the above embodiment, the elastic part 10 is integrally molded with the push rod 8. However, the elastic part may not be integrally molded with the push rod. For example, the elastic part may be a separate part from the push rod and assembled to the push rod. In the above embodiment, the elastic part 10 is connected to the push rod 8. However, the elastic part may not be connected to the push rod. In the above embodiment, the elastic part 10 includes the first rotation stopper 11 and the second rotation stopper 13, and the spring part 12 is provided between the first rotation stopper 11 and the second rotation stopper 13. However, the number of rotation stoppers included in the elastic part may be one, or may be three or more, and is not particularly limited. The position of the rotation stopper is also not particularly limited. Furthermore, the elastic part may not have a rotation stopper.

[0067] In the above embodiment, a cartridge-type cosmetic extrusion container 1 has been described in which the operating body 6 is capable of rotating relative to the cartridge cylinder 3 in one direction and only extrudes the cosmetic M. However, the cartridge-type cosmetic extrusion container according to the present disclosure may be a cartridge-type cosmetic extrusion container that is capable of rotating relative to both one direction and the direction opposite to that one direction.

[0068] In the above embodiment, an example in which the cosmetic M is volatile has been described. However, the cosmetic according to the present disclosure may be a cosmetic such as lip gloss, lipstick, eye color, or eyeliner, or a cosmetic made of a mud or liquid (semi-solid). In this way, various types of cosmetic can be applied to the cartridge-type cosmetic extruding container according to the present disclosure. [Explanation of symbols]

[0069] Reference Signs List 1: Cartridge-type cosmetic extrusion container, 2: Cap, 2A: Outer cap, 2B: Inner cap, 2b: Annular recess, 2c: Annular protrusion, 2d: Inner peripheral surface, 2f: Recess, 2g: Annular protrusion, 2h: Insertion portion, 2j: End surface, 3: Cartridge tube, 3A: Front tube portion, 3B: Rear tube portion, 3b: Opening, 3C: Flange portion, 3c: Tapered surface, 3d: Protrusion, 3D: Female screw portion, 3f: Inclined surface, 3g: Protrusion, 3h: Internal space, 3j: First internal space , 3k...second internal space, 3m...female screw, 3p...annular recess, 3q...annular protrusion, 3r...male screw, 3s...slit, 3t...first slit portion, 3v...second slit portion, 3w...protrusion, 5...relay tube, 5b...outer surface, 5c...first internal space, 5d...second internal space, 5f...partition wall, 5g...through hole, 5h...female screw, 5j...opening, 5k...annular protrusion, 5m...annular recess, 5p...first smooth surface, 5q...inclined surface, 5r...second smooth surface, 5s...protrusion, 5s1...inclined surface, 5s2...top surface, 5s3...wall surface, 5t...inner surface, 5v...annular recess, 5w...annular protrusion, 5x...opening, 6...operation body, 6A...ratchet cylinder portion, 6B...cylindrical portion, 6b...projection portion, 6C...large diameter portion, 6c...slit, 6d...first slit portion, 6f...second slit portion, 6g...inclined surface, 6h...annular protrusion, 6j...expanded diameter portion, 6k...annular recess, 6m...internal space, 6p...rib, 6q...bottom portion, 7...piston, 7b...first recess, 7c...second recess, 8...push rod, 8b...male screw, 8c...first columnar portion, 8d...second columnar portion, 9...spring, 10...elastic portion, 11...first rotation stop portion, 11b...large diameter portion, 11c...recess, 12...spring portion, 12b...slit, 12c...first slit portion, 12d...second slit portion, 13...second rotation stop portion, 13b...outer peripheral surface, 13c...convex portion, D1...axial direction, D2...rotational direction, M...cosmetic material, R...ratchet mechanism, T...screw-engagement portion.

Claims

1. A cartridge cylinder containing a cosmetic material; a container body to which the cartridge cylinder is detachably attached; a push rod that is accommodated in the container body and moves forward inside the cartridge tube to push the cosmetic forward, The cartridge cylinder has an internal thread formed on its inner surface, and the push rod has an external thread formed on its outer surface, the container body includes an operating body that is rotatable relative to the cartridge cylinder, A cartridge-type cosmetic extrusion container in which a screwing action between the female screw and the male screw is performed in association with a relative rotation of the operating body with respect to the cartridge cylinder, and the push rod advances to extrude the cosmetic, an elastic portion capable of biasing the push rod forward inside the container body; A spring that biases the push rod rearward inside the container body, When the cartridge cylinder is removed from the container body, the push rod, which has been moved rearward by the spring, is urged forward by the elastic portion, When the cartridge cylinder is attached to the container body and the push rod moves forward in accordance with the relative rotation of the operation body with respect to the cartridge cylinder, the forward biasing force by the elastic portion is released. Cartridge-type cosmetic extrusion container.

2. The elastic portion is connected to the push rod. The cartridge-type cosmetic extruding container according to claim 1.

3. The elastic portion has a rotation stopper portion on an outer surface thereof that engages with an inner surface of the container body in a rotational direction to rotate the push rod and the operation body synchronously.

3. The cartridge-type cosmetic extruding container according to claim 1 or 2.

4. The push rod and the elastic portion are integrally formed. The cartridge-type cosmetic extruding container according to any one of claims 1 to 3.

5. the cartridge cylinder has a cylindrical female screw portion in which the female screw is formed, The female screw portion has a slit communicating the inside and outside of the female screw portion, and is thereby elastically deformable in a radial direction of the female screw portion. The cartridge-type cosmetic extruding container according to any one of claims 1 to 4.

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