Cosmetic product push-out container

Abstract

The present disclosure provides a cartridge-type cosmetic push-out container in which a cartridge can be easily attached. A cartridge-type cosmetic push-out container (1) of one embodiment includes a cartridge (3), a container body (4), a push rod (8), an elastic portion (10) configured to apply a force to the push rod (8) in a forward direction inside the container body (4), and a spring (9) configured to apply a force to the push rod (8) in a rearward direction inside the container body (4). When the cartridge (3) is detached from the container body (4), the push rod (8) that has moved in the rearward direction by the spring (9) is forced in the forward direction by the elastic portion (10). When the cartridge (3) is attached to the container body (4) and the push rod (8) advances in conjunction with relative rotation of an operation body (6) with respect to the cartridge (3), the application force in the forward direction by the elastic portion (10) is released.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a cartridge type cosmetic product push-out container. BACKGROUND

[0002] Conventionally, various containers have been known as cartridge type cosmetic product push-out containers. Japanese Patent Application Publication No. 7-177930 discloses a cartridge type cosmetic product pressurized container. The cartridge type pressurized container includes a cartridge in which a liquid cosmetic product is stored, and a holder to which the cartridge is attached. Inside the cartridge, there are provided an applicator to apply the cosmetic product, a cosmetic product storage chamber to store the cosmetic product supplied to the applicator, and a piston located on the opposite side of the applicator when viewed from the cosmetic product storage chamber.

[0003] Inside the holder, there are provided a screw rod having a guide protrusion at the rear end, a pressing spring to apply a force to the screw rod in the forward direction, and a return spring to apply a force to the screw rod in the rearward direction. The pressing spring is provided at the rear of the guide protrusion, and the return spring is provided at the front of the guide protrusion. When the cartridge is pulled out of the holder, the return spring returns the screw rod to the original position. When the cartridge is attached to the holder, the pressing spring applies a force to the screw rod in the forward direction.

[0004] In the cartridge type cosmetic product pressurized container described above, in a state where the cartridge cylinder is detached from the holder, the position of the tip end of the screw rod is determined by the applied force in the forward direction generated by the pressing spring and the applied force in the rearward direction generated by the return spring. However, for the pressing spring and the return spring, the applied forces sometimes have individual differences. In addition, in the cartridge type cosmetic product pressurized container described above, as the screw rod advances, the pressing spring elongates and the return spring shortens, and as the screw rod retreats, the pressing spring shortens and the return spring elongates.

[0005] Thus, as the screw rod advances and retreats, the pressing spring and the return spring expand and contract, and thus the applied force of the pressing spring and the applied force of the return spring are likely to deviate. When the deviation of the applied force of the pressing spring and the applied force of the return spring becomes large, the position of the tip end of the screw rod in a state where the cartridge cylinder is not attached can also deviate. In the case where the position of the tip end of the screw rod deviates, the attachment of the cartridge cylinder can become complicated. Therefore, in the cartridge type cosmetic product push-out container, it is required that the attachment of the cartridge cylinder can be easily performed.

[0006] PRIOR ART DOCUMENTS

[0007] PATENT DOCUMENTS

[0008] Patent Document 1: Japanese Patent Application Publication No. 7-177930 SUMMARY

[0009] The present disclosure aims to provide a cartridge type cosmetic product push-out container in which the attachment of the cartridge cylinder can be easily performed.

[0010] The cartridge-type cosmetic product push-out container according to the present disclosure includes a cartridge cylinder that contains a cosmetic product, a container body that is configured to allow the cartridge cylinder to be attached to and detached from the container body, and a push rod that is contained in the container body, advances inside the cartridge cylinder, and pushes out the cosmetic product to the front. An internal thread is formed on an inner surface of the cartridge cylinder, and an external thread is formed on an outer surface of the push rod. The container body includes an operation body that is configured to be able to rotate relative to the cartridge cylinder. As the operation body rotates relative to the cartridge cylinder, the internal thread and the external thread are engaged, the push rod advances, and the cosmetic product is pushed out. The cartridge-type cosmetic product push-out container includes an elastic portion that is configured to be able to apply a force to the push rod in the forward direction inside the container body, and a spring that applies a force to the push rod in the rearward direction inside the container body. When the cartridge cylinder is detached from the container body, the push rod that has moved in the rearward direction by the spring is forced in the forward direction by the elastic portion. When the cartridge cylinder is attached to the container body and the push rod advances as the operation body rotates relative to the cartridge cylinder, the force applied to the push rod in the forward direction by the elastic portion is released.

[0011] In the cartridge-type cosmetic product push-out container, the cartridge cylinder contains a cosmetic product, and the cartridge cylinder is configured to be able to be attached to and detached from the container body. Therefore, when the cosmetic product is used up or the like, the cartridge cylinder can be detached from the container body, and a new cartridge cylinder can be attached to the container body. Thus, when the cosmetic product is used up or the like, only the cartridge cylinder needs to be replaced, and the container body and the push rod can be reused without being discarded, so the number of discarded components can be reduced. Therefore, the cartridge-type cosmetic product push-out container can be configured to be environmentally friendly. The elastic portion is disposed inside the container body and is configured to be able to apply a force to the push rod in the forward direction. When the cartridge cylinder is detached from the container body, the push rod is forced in the forward direction by the elastic portion. On the other hand, when the cartridge cylinder is attached to the container body and the push rod advances, the force applied in the forward direction by the elastic portion is released. Therefore, when the push rod advances, the elastic portion does not apply a force to the push rod, so the length of the elastic portion can be designed to be shorter than in the case where a press spring applies a force to the push rod when the push rod advances. Thus, the length of the elastic portion can be shortened, and the variation in the force applied to the push rod by the elastic portion can be reduced, so the attachment of the cartridge cylinder to the push rod can be easily performed.

[0012] The elastic portion can be connected to the push rod. In this case, the elastic portion moves together with the push rod, so the installation of the elastic portion can be easily performed.

[0013] The elastic portion can have a rotation-stopping portion on the outer surface, the rotation-stopping portion engages with the inner surface of the container body in the rotation direction, and the push rod and the operation body are caused to rotate in synchronization. In this case, the elastic portion has the rotation-stopping portion, so the length of the elastic portion and the rotation-stopping portion can be shortened compared to the case where the rotation-stopping portion and the elastic portion are separately provided. Therefore, the components can be made compact.

[0014] It is also possible that the push rod is integrally formed with the elastic portion. In this case, the number of components of the cartridge-type cosmetic product push-out container can be reduced, and thus the cartridge-type cosmetic product push-out container can be easily manufactured.

[0015] It is also possible that the cartridge cylinder has a threaded inner portion formed in a cylindrical shape. It is also possible that the threaded inner portion is configured to be elastically deformed in a radial direction of the threaded inner portion by having a slit that communicates the inside and outside of the threaded inner portion. In this case, when the cartridge cylinder is attached to the container main body, the threaded inner portion can be elastically deformed to the inside in the radial direction, and the inner thread can be engaged with the outer thread of the push rod. Thus, the screwing of the inner thread and the outer thread when the cartridge cylinder is attached can be easily performed.

[0016] Effects of Invention

[0017] According to the present disclosure, the attachment of the cartridge cylinder can be easily performed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 (a) of FIG. 1 is a side view of a cartridge-type cosmetic product push-out container according to an embodiment. Figure 1 (b) of FIG. 1 is a side view showing a state in which a cap is removed from the cartridge-type cosmetic product push-out container of (a) of FIG. 1.

[0019] Figure 2 is a cross-sectional view taken along line A-A of (a) of FIG. 1. Figure 1

[0020] Figure 3 (a) of FIG. 2 is a side view showing a cartridge cylinder according to an embodiment. Figure 3 (b) of FIG. 2 is a cross-sectional view taken along line B-B of (a) of FIG. 2.

[0021] Figure 4 (a) of FIG. 3 is a side view showing a relay cylinder of a container main body according to an embodiment. Figure 4 (b) of FIG. 3 is a cross-sectional view taken along line C-C of (a) of FIG. 3.

[0022] Figure 5 (a) of FIG. 4 is a perspective view showing a push rod according to an embodiment. Figure 5 (b) of FIG. 4 is a perspective view showing an elastic portion according to an embodiment.

[0023] Figure 6 (a) of FIG. 5 is a side view showing an operating body of a container main body according to an embodiment. Figure 6 (b) of FIG. 5 is a cross-sectional view taken along line D-D of (a) of FIG. 5.

[0024] Figure 7 is a cross-sectional view showing a state in which a cap of a cartridge-type cosmetic product push-out container according to an embodiment is removed and a cosmetic product is pushed out.

[0025] Figure 8 ​is a sectional view showing a state before the cartridge is attached to the container body of the embodiment.

[0026] Figure 9 is a sectional view showing a state where the cartridge is attached to the container body of the embodiment.

[0027] Explanation of Reference Numerals

[0028] 1: Cartridge-type cosmetic push-out 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; 3A: Front-side cartridge portion; 3B: Rear-side cartridge portion; 3b: Opening; 3C: Flange portion; 3c: Tapered surface; 3d: Protrusion; 3D: Internal thread portion; 3f: Inclined surface; 3g: Protrusion; 3h: Internal space; 3j: First internal space; 3k: Second internal space; 3m: Internal thread; 3p: Annular recess; 3q: Annular protrusion; 3r: External thread; 3s: Slit; 3t: First slit portion; 3v: Second slit portion; 3w: Protrusion; 5: Relay cartridge; 5b: Outer surface; 5c: First internal space; 5d: Second internal space; 5f: Partition wall; 5g: Through-hole; 5h: Internal thread; 5j: Opening; 5k: Annular protrusion; 5m: Annular recess; 5p: First flat surface; 5q: Inclined surface; 5r: Second flat surface; 5s: Protrusion; 5s1: Inclined surface; 5s2: Top surface; 5s3: Wall surface; 5t: Inner surface; 5v: Annular recess; 5w: Annular protrusion; 5x: Opening; 6: Operating body; 6A: Ratchet cartridge portion; 6B: Cylindrical portion; 6b: Protrusion; 6C: Large-diameter portion; 6c: Slit; 6d: First slit portion; 6f: Second slit portion; 6g: Inclined surface; 6h: Annular protrusion; 6j: Enlarged-diameter portion; 6k: Annular recess; 6m: Internal space; 6p: Protruding strip; 6q: Bottom portion; 7: Piston; 7b: First recess; 7c: Second recess; 8: Push rod; 8b: External thread; 8c: First columnar portion; 8d: Second columnar portion; 9: Spring; 10: Elastic portion; 11: First rotation-stopping portion; 11b: Large-diameter portion; 11c: Recess; 12: Spring portion; 12b: Slit; 12c: First slit portion; 12d: Second slit portion; 13: Second rotation-stopping portion; 13b: Outer peripheral surface; 13c: Protrusion; D1: Axial direction; D2: Rotational direction; M: Cosmetic; R: Ratchet mechanism; T: Screw-engaging portion. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments of the cartridge-type cosmetic push-out container of the present disclosure will be described with reference to the drawings. In the explanation of the drawings, the same or equivalent components are denoted by the same reference numerals, and repeated explanation will be appropriately omitted. Furthermore, in order to facilitate understanding, the drawings will sometimes omit or exaggerate a part, and the dimensional proportions and the like are not limited to what is described in the drawings.

[0030] Figure 1 (a) is a side view of the cartridge-type cosmetic push-out container 1 of the embodiment. Figure 1 (b) is a side view showing a state in which the cap 2 is removed from the cartridge-type cosmetic push-out container 1. Figure 2 Figure 1 is a cross-sectional view taken along the line A-A of (a). As shown in Figure 1 (a) of (a), Figure 1 (b) of (a), and Figure 2 The cartridge-type cosmetic push-out container 1 of the embodiment is, for example, a pen-type container that pushes out the cosmetic M accommodated in the cartridge tube 3 by the user's operation.

[0031] The cosmetic M is, for example, an eyebrow pencil, an eyeliner, a lip liner, a lipstick, a lip gloss, a makeup stick, or a concealer. As one example, the cosmetic M has volatility. The cosmetic M can also be a soft (for example, a semi-solid, a soft solid, a soft, a gel, a mousse, or a paste containing them, or the like) stick. For example, the cosmetic M can also be a thin-diameter stick having an outer diameter of 1.5 mm or less, a normal-diameter stick having an outer diameter of 1.5 mm or more and 3.0 mm or less, or a thick-diameter stick having an outer diameter of 3.0 mm or more.

[0032] The cartridge-type cosmetic push-out container 1 includes a cap 2, a cartridge tube 3 that accommodates the cosmetic M, and a container main body 4 that is attached to one end in the axial direction D1 of the cartridge tube 3. In the present disclosure, the "axial line" means the axial line of the cartridge tube, that is, the center line of the cartridge-type cosmetic push-out container extending in the longitudinal direction of the cartridge-type cosmetic push-out container. The "axial direction" means the direction in which the axial line of the cartridge-type cosmetic push-out container extends (the direction along the axial line). The "axial direction" is, for example, the longitudinal direction of the cartridge-type cosmetic push-out container.

[0033] "Front", "front side", and "front direction" mean the direction in which the axial direction of the container main body is oriented toward the cartridge tube, and "rear", "rear side", and "rear direction" mean the direction in which the axial direction of the cartridge tube is oriented toward the container main body. "Radial direction" means the direction orthogonal to the axial direction, and "rotation direction" means the direction along the ring centered on the axial line (for example, the circumferential direction). In the present embodiment, the direction in which the cosmetic M is pushed out is set to the front direction (the advancing direction), and the opposite direction is set to the rear direction (the retreating direction).

[0034] ​In the present embodiment, the container body 4 has a relay cylinder 5 to which the cartridge cylinder 3 is attached, and an operating body 6 which is engaged with the relay cylinder 5 so as to be relatively rotatable. In the cartridge-type cosmetic ejecting container 1, the cap 2 is removed, and the cartridge cylinder 3 and the container body 4 (operating body 6) are relatively rotated in one direction, and the cosmetic M is ejected from the cartridge cylinder 3, and thus is supplied for use. In the present embodiment, the operating body 6 which is a part of the container body 4 is relatively rotated in one direction with respect to the cartridge cylinder 3. The cap 2 includes a bottomed cylindrical outer cap 2A and a stepped cylindrical inner cap 2B which is held to the bottom of the outer cap 2A.

[0035] For example, the outer cap 2A is composed of PP (polypropylene), and the inner cap 2B is composed of TPEE (polyester thermoplastic elastomer). The outer cap 2A has an annular recessed portion 2b and an annular protruded portion 2c on the inner surface. The outer cap 2A is a site into which the cartridge cylinder 3 is inserted. The outer cap 2A has an inner peripheral surface 2d on which a recessed portion 2f to which the cartridge cylinder 3 is engaged is formed.

[0036] The inner cap 2B has an annular protruded portion 2g on the outer peripheral surface, and the annular protruded portion 2g which passes over the annular protruded portion 2c is fitted into the annular recessed portion 2b, and thus the inner cap 2B is fixed to the outer cap 2A. The inner cap 2B is provided in order to ensure the airtightness of the cosmetic M which is positioned 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.

[0037] Inside the cartridge cylinder 3, a piston 7 which ejects the cosmetic M in the front direction, and a push rod 8 which has an outer screw thread 8b on the outer surface and moves the piston 7 in the front direction are arranged. The push rod 8 is arranged so as to extend in the axial direction Dl inside the container body 4 and advance inside the cartridge cylinder 3. Figure 3 (b) of FIG. 1 is a side view of the cartridge cylinder 3. Figure 3 (b) of FIG. 1 is a side view of the cartridge cylinder 3. Figure 3 (b) of FIG. 1 is a side view of the cartridge cylinder 3. Figure 2 , Figure 3 (b) of FIG. 1 is a side view of the cartridge cylinder 3. Figure 3 (b) of FIG. 1 is a side view of the cartridge cylinder 3.

[0038] For example, the cartridge cylinder 3 is composed of PE (polyethylene). The front-side cylinder portion 3A has an opening 3b which is positioned at one end in the axial direction Dl, and a tapered surface 3c which is inclined so as to increase the diameter of the cartridge cylinder 3 as it moves away from the opening 3b. The opening 3b is a site in the cartridge cylinder 3 into which the cosmetic M is exposed, and the cosmetic M is projected from the opening 3b so as to be supplied for use. The tapered surface 3c extends, for example, from the opening 3b to a position which passes over the center in the axial direction Dl of the cartridge cylinder 3.

[0039] The front-side tubular portion 3A has a protruding portion 3d located at the rear side of the tapered surface 3c, an inclined surface 3f located at the rear side of the protruding portion 3d and inclined so as to increase in diameter of the cartridge tubular portion 3 toward the rear side, and a protruding portion 3g extending in the axial direction Dl at the rear side of the inclined surface 3f. The front-side tubular portion 3A has, for example, a plurality of protruding portions 3d arranged in the rotation direction D2 of the cartridge tubular portion 3. The plurality of protruding portions 3d are respectively engaged with the recessed portions 2f of the cap 2 in the axial direction Dl. The protruding portions 3d are, for example, circular.

[0040] The front-side tubular portion 3A has a plurality of protruding portions 3g arranged in the rotation direction D2 of the cartridge tubular portion 3. The cap 2 is attached to the cartridge tubular portion 3 in a state where the protruding portions 3g are engaged with the inner surface of the cap 2 and the end surface 2j forming the opening of the cap 2 is opposed to the flange portion 3C in the axial direction Dl. The flange portion 3C is exposed in the state where the cap 2 is attached to the cartridge tubular portion 3.

[0041] The internal space 3h of the cartridge tubular portion 3 extends toward the rear side from the opening 3b. The internal space 3h extends through the cartridge tubular portion 3 in the axial direction Dl. The internal space 3h accommodates the cosmetic material M, the piston 7, and the push rod 8 therein. The piston 7 has, for example, a first recessed portion 7b recessed at the front end and a second recessed portion 7c recessed at the rear end. The first recessed portion 7b accommodates the cosmetic material M therein, and the second recessed portion 7c accommodates the push rod 8 therein. The cosmetic material M, the piston 7, and the push rod 8 are arranged in this order. The internal space 3h includes a first internal space 3j that accommodates the cosmetic material M and the piston 7 therein and a second internal space 3k that accommodates the push rod 8 therein at the rear side of the first internal space 3j.

[0042] For example, the inner surface of the cartridge tubular portion 3 that divides the first internal space 3j and the inner surface of the cartridge tubular portion 3 that divides the second internal space 3k are flat surfaces. For example, the inner diameter of the second internal space 3k is larger than the inner diameter of the first internal space 3j. An internally threaded portion 3D is formed at the rear side of the second internal space 3k, and the internally threaded portion 3D has an internal thread 3m that is screwed with an external thread 8b of the push rod 8. The external thread 8b and the internal thread 3m constitute a screwing portion T that generates a screwing action that advances the push rod 8 relative to the cartridge tubular portion 3.

[0043] The rear-side tubular portion 3B has an annular recessed portion 3p located at the rear side of the flange portion 3C, an annular protruding portion 3q located at the rear side of the annular recessed portion 3p, and an externally threaded portion 3r extending toward the rear side from the annular protruding portion 3q. The annular recessed portion 3p, the annular protruding portion 3q, and the externally threaded portion 3r are portions to which the container main body 4 is attached. Specifically, the externally threaded portion 3r is screwed into the container main body 4, and the annular protruding portion 3q is engaged with the container main body 4 in the axial direction Dl, whereby the cartridge tubular portion 3 is attached to the container main body 4.

[0044] The internally threaded portion 3D extends rearward from a portion of the cartridge tube 3 in which the externally threaded portion 3r is formed. The internally threaded portion 3D is cylindrical. The internally threaded portion 3D has a slit 3s that communicates the inside and outside of the internally threaded portion 3D, and a protrusion 3w that protrudes to the radially outer side of the internally threaded portion 3D. For example, the internally threaded portion 3D has two slits 3s and two protrusions 3w, and the slit 3s and the protrusion 3w are formed on each of the radially one side and the other side of the internally threaded portion 3D. In this case, the attachment of the cartridge tube 3 to the container body 4 can be performed more stably. However, the number of the slit 3s and the protrusion 3w is not particularly limited to two or more than three.

[0045] For example, the slit 3s is "コ" shaped. The slit 3s includes a pair of first slit portions 3t that extend along the axial direction D1 and are arranged along the rotational direction D2, and a second slit portion 3v that connects the axial direction D1 end portions of the pair of first slit portions 3t to each other. The second slit portion 3v extends between the rear ends of the pair of first slit portions 3t along the rotational direction D2. The inside of the "コ" shaped region of the slit 3s (the portion between the pair of first slit portions 3t) is provided to be elastically deformable in the radial direction of the cartridge tube 3, and the protrusion 3w is formed in the region provided to be elastically deformable. The protrusion 3w engages with the container body 4 in the axial direction D1 when the cartridge tube 3 is attached to the container body 4. The protrusion 3w protrudes to the radially outer side of the cartridge tube 3 between the pair of first slit portions 3t.

[0046] The internally threaded portion 3D has an internal thread 3m on the inner surface. The internal thread 3m is formed, for example, between the pair of first slit portions 3t (the inside of the protrusion 3w). As described above, the region between the pair of first slit portions 3t is provided to be elastically deformable in the radial direction of the cartridge tube 3, and the internal thread 3m is provided to be displaceable in the radial direction of the cartridge tube 3 as a result.

[0047] The cartridge tube 3 configured as described above is provided to be replaceable with respect to the container body 4. Specifically, when the cosmetic M is used up, or the like, the cartridge tube 3 can be detached from the container body 4, and a new cartridge tube 3 filled with the cosmetic M can be attached to the container body 4. The attachment of the cartridge tube 3 to the container body 4 will be described later in detail.

[0048] Next, the container body 4 will be described. Figure 4 (b) of FIG. 1 is a plan view of the container body 4. Figure 4 (b) of FIG. 1 is a plan view of the container body 4. Figure 4 (b) of FIG. 1 is a plan view of the container body 4. Figure 2 , Figure 4 (b) of FIG. 1 is a plan view of the container body 4. Figure 4The (b) shown in the container body 4 on the inner side for the following components: push rod 8; spring 9, to the rear of the push rod 8 force; and elastic part 10, is set to be able to forward push rod 8 force. For example, the elastic part 10 constitutes the rear of the push rod 8, the spring 9 is sandwiched between the rear of the push rod 8 and the relay cylinder 5 and force to the rear of the push rod 8.

[0049] The relay cylinder 5 is composed of, for example, PP (polypropylene). The relay cylinder 5 is cylindrical. For example, the outer surface 5b of the relay cylinder 5 is provided as a smooth surface without steps. The relay cylinder 5 has: a first internal space 5c for insertion of the cartridge cylinder 3; and a second internal space 5d for insertion of the operation body 6. The first internal space 5c has a ring-shaped protrusion 5k protruding to the radial inner side of the relay cylinder 5 rearward of the opening 5j at the front end of the relay cylinder 5, has a ring-shaped recess 5m recessed to the radial outer side of the relay cylinder 5 rearward of the ring-shaped protrusion 5k, and has an internal thread 5h into which the external thread 3r of the cartridge cylinder 3 is screwed rearward of the ring-shaped recess 5m. The internal thread 5h in the first internal space 5c is formed with: a first smooth surface 5p; an inclined surface 5q inclined in a manner that the first internal space 5c is reduced in diameter rearward of the first smooth surface 5p; and a second smooth surface 5r located rearward of the inclined surface 5q. The first smooth surface 5p, the inclined surface 5q, and the second smooth surface 5r are sites into which the internal thread portion 3D of the cartridge cylinder 3 enters.

[0050] The relay cylinder 5 has a partition wall 5f between the first internal space 5c and the second internal space 5d. The partition wall 5f is located rearward of the second smooth surface 5r. The partition wall 5f is formed with a through-hole 5g that penetrates along 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 diameters of the first internal space 5c and the second internal space 5d. The second internal space 5d is formed with a protrusion 5s that engages the operation body 6 in the rotation direction D2.

[0051] The relay cylinder 5 has, for example, a plurality of protrusions 5s arranged along the rotation direction D2. The protrusions 5s constitute part of a ratchet mechanism R that allows relative rotation of the operation body 6 with respect to the cartridge cylinder 3 in one direction and restricts relative rotation of the operation body 6 with respect to the cartridge cylinder 3 in the opposite direction (the opposite direction of the above-mentioned one direction). The above-mentioned one direction corresponds to the delivery direction in which the cosmetic M is delivered (pushed out) by the advancement of the push rod 8 and the piston 7.

[0052] The protrusion 5s has, for example, an inclined surface 5s1 extending from the inner surface 5t of the relay cylinder 5 in a direction inclined radially relative to the relay cylinder 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 the direction from the inclined surface 5s1 toward the wall surface 5s3 (one direction) is permitted, but rotation of the operating body 6 in the direction from the wall surface 5s3 toward the inclined surface 5s1 (the opposite direction) is restricted.

[0053] An annular recess 5v and an annular convex portion 5w are formed behind the protrusion 5s in the second internal space 5d. An opening 5x for inserting an operating body 6 is formed at the rear end of the second internal space 5d. The annular recess 5v and the annular convex portion 5w are the parts for engaging the operating body 6, which is inserted into the second internal space 5d through the opening 5x, in the axial direction D1. The operating body 6 engages with the relay cylinder 5 in the axial direction D1, and engages with the relay cylinder 5 in a manner that allows it to rotate only in one direction and cannot rotate in the opposite direction.

[0054] Figure 5 (a) is a three-dimensional diagram representing push rod 8. Figure 5 (b) is a perspective view showing the elastic part 10, which is configured to apply force forward to the push rod 8. Figure 2 , Figure 5 (a) and Figure 5 As shown in (b), for example, the elastic portion 10 is connected to the push rod 8. That is, the elastic portion 10 is continuous at the rear of the push rod 8. The push rod 8 has: an external thread 8b; a first columnar portion 8c that abuts against the piston 7; and a second columnar portion 8d that extends rearward from the external thread 8b.

[0055] The push rod 8 is made of, for example, PE (polyethylene). An external thread 8b extends rearward from the first columnar portion 8c. The external thread 8b engages with the internal thread 3m of the casing 3. The outer surfaces of the first columnar portion 8c and the second columnar portion 8d are smooth surfaces. The first columnar portion 8c is the part that enters the second recess 7c of the piston 7 to press the piston 7 forward. The second columnar portion 8d extends along the axial direction D1 between the external thread 8b and the elastic portion 10.

[0056] The elastic part 10 is made of, for example, PE (polyethylene). The elastic part 10 is housed within the operating body 6. For example, the elastic part 10 is integrally formed with the push rod 8. The elastic part 10 includes: a first anti-rotation part 11 having a diameter larger than that of the push rod 8; a spring part 12 configured to elastically deform; and a second anti-rotation part 13 located behind the spring part 12. The first anti-rotation part 11 and the second anti-rotation part 13 function to prevent rotation of the operating body. Thus, the elastic part 10 engages with the operating body 6 in a manner that allows for synchronous rotation (but not rotation).

[0057] The first anti-rotation portion 11 has: a plurality of large-diameter portions 11b, each having a diameter larger than that of the push rod 8; and recesses 11c located between the plurality of large-diameter portions 11b. For example, the first anti-rotation portion 11 has a plurality of large-diameter portions 11b and a plurality of recesses 11c, which are arranged alternately along the rotation direction D2. As an example, the first anti-rotation portion 11 has four large-diameter portions 11b and four recesses 11c. The large-diameter portions 11b and recesses 11c engage with the inner surface of the operating body 6 in the rotation direction D2, thereby engaging the elastic portion 10 with respect to the operating body 6 in a manner that allows for synchronous rotation.

[0058] Spring 9 abuts against the front end of the first anti-rotation part 11. That is, the first anti-rotation part 11 functions as a flange portion that one end (rear end) of spring 9 contacts. Spring 9 is disposed between the first anti-rotation part 11 and the partition wall 5f of the relay cylinder 5, and applies force to the elastic part 10 rearward relative to the relay cylinder 5.

[0059] The spring portion 12 is cylindrical, with a slit 12b forming a slit that connects the inside and outside of the spring portion 12. The spring portion 12 is, for example, cylindrical. The slit 12b includes: a pair of first slit portions 12c extending along the rotation direction D2; and a second slit portion 12d whose position in the rotation direction D2 differs from that of the pair of first slit portions 12c. The spring portion 12 has a plurality of (for example, two pairs, four in total) first slit portions 12c and a plurality of second slit portions 12d, with the pair of first slit portions 12c and the pair of second slit portions 12d alternating along the axial direction D1. By forming the first slit portions 12c and the second slit portions 12d in this way, a force applied in the axial direction D1 can be exerted in the spring portion 12 while maintaining appropriate strength. That is, the spring portion 12 is configured to deform in the axial direction D1, generating a forward force on the push rod 8 when pressed into the rear end of the operating body 6 along the axial direction D1.

[0060] The second anti-rotation portion 13 includes: an outer peripheral surface 13b extending rearward from the spring portion 12; and a plurality of protrusions 13c protruding radially outward from the outer peripheral surface 13b towards the elastic portion 10. The plurality of protrusions 13c are arranged along the rotation direction D2 of the elastic portion 10, and a concave shape is provided between a pair of protrusions 13c arranged along the rotation direction D2. The concave portion and the protrusions 13c engage with the inner surface of the operating body 6 in the rotation direction D2, thereby engaging the elastic portion 10 with the operating body 6 in a manner that allows for synchronous rotation.

[0061] Figure 6 (a) is a side view of the operating body 6. Figure 6 (b) is Figure 6 (a) is a cross-sectional view along the D-D line. For example... Figure 6 (a) and Figure 6As shown in (b), the operation body 6 is in a bottomed cylindrical shape having a bottom 6q. The operation body 6 includes a ratchet cylinder portion 6A on the front side, a cylindrical portion 6B extending rearward from the ratchet cylinder portion 6A, and a large diameter portion 6C extending rearward from the rear end of the cylindrical portion 6B. The ratchet cylinder portion 6A and the cylindrical portion 6B are portions that are inserted into the inside of the relay cylinder 5, and the large diameter portion 6C is a portion that is exposed.

[0062] The operation body 6 is composed of, for example, PE (polyethylene). The ratchet cylinder portion 6A extends from the cylindrical portion 6B to the side opposite the large diameter portion 6C. For example, the diameter of the ratchet cylinder portion 6A is smaller than the diameter of the cylindrical portion 6B. The ratchet cylinder portion 6A has a protrusion 6b that is able to move in the radial direction of the operation body 6 by elastically deforming a portion of the ratchet cylinder portion 6A. For example, the ratchet cylinder portion 6A has two protrusions 6b. The protrusion 6b constitutes a portion of a ratchet mechanism R that allows relative rotation of the operation body 6 in one direction with respect to the cartridge cylinder 3 and restricts relative rotation in the opposite direction. The protrusion 6b is configured to be able to move in one direction with respect to the protrusion 5s of the relay cylinder 5 and unable to move in the opposite direction.

[0063] The ratchet cylinder portion 6A has a slit 6c that is formed so as to surround the protrusion 6b. For example, the ratchet cylinder portion 6A has two slits 6c and two protrusions 6b arranged in the radial direction of the ratchet cylinder portion 6A. The slit 6c is in a "コ" shape. The slit 6c includes a pair of first slit portions 6d arranged so as to extend in the rotation direction D2 and arranged in the axial direction D1, and a second slit portion 6f that connects the pair of first slit portions 6d to each other. The protrusion 6b protrudes to the radial direction outside in the inner side region of the "コ" shaped portion of the slit 6c (the region between the pair of first slit portions 6d). In this way, the region between the pair of first slit portions 6d in which the protrusion 6b is formed is configured to be able to elastically deform in the radial direction of the operation body 6, and as a result, the protrusion 6b is configured to be able to displace in the radial direction of the operation body 6.

[0064] The cylindrical portion 6B is in a stepped cylindrical shape. The cylindrical portion 6B has an inclined surface 6g that is inclined so that the diameter of the operation body 6 increases from the rear end of the ratchet cylinder portion 6A, a ring-shaped convex portion 6h located rearward of the inclined surface 6g, and a large diameter portion 6j located rearward of the ring-shaped convex portion 6h. An annular concave portion 6k that is recessed with respect to the ring-shaped convex portion 6h and the large diameter portion 6j is formed between the ring-shaped convex portion 6h and the large diameter portion 6j. The ring-shaped convex portion 6h and the annular concave portion 6k are engaged with the annular concave portion 5v and the ring-shaped convex portion 5w of the relay cylinder 5, respectively. Thus, the operation body 6 is engaged with the relay cylinder 5 in the axial direction D1.

[0065] An internal space 6m is formed on the inner side of the operating body 6 for the insertion of the elastic part 10 and the push rod 8. A protrusion 6p is formed in the internal space 6m for the elastic part 10 to engage in the rotational direction D2. The protrusion 6p is formed, for example, on the inner side of the cylindrical part 6B and the large-diameter part 6C. The operating body 6 has a plurality of protrusions 6p, which extend along the axial direction D1. The protrusions 6p are engaged with the first anti-rotation part 11 and the second anti-rotation part 13 of the elastic part 10 in the rotational direction D2. The protrusion 6p engages with the concave portion between the recess 11c and a pair of protrusions 13c, thereby engaging the elastic part 10 with the operating body 6 in the rotational direction D2. Thus, by engaging with the first anti-rotation part 11 and the second anti-rotation part 13 in the rotational direction D2, the protrusion 6p restricts the torsion of the spring part 12 located between the two anti-rotation parts, causing the spring part 12 to extend and retract only along the axial direction.

[0066] Next, an example of how to use the box-type cosmetic dispenser 1 will be explained. First, in Figure 2 In the initial state shown, the cover 2 is removed from the casing 3. Then, the container body 4 is rotated relative to the casing 3 in one direction. In this embodiment, the operating body 6 is rotated relative to the casing 3 and the relay cylinder 5 in one direction. With this relative rotation, the operating body 6, the elastic part 10, and the push rod 8 rotate relative to the casing 3. Due to the engagement of the external thread 8b and the internal thread 3m (threaded part T), the push rod 8 advances relative to the casing 3.

[0067] like Figure 2 and Figure 7 As shown, when the push rod 8 moves forward, the piston 7 and the cosmetic material M move forward relative to the cartridge 3. As it moves forward, the cosmetic material M protrudes from the opening 3b of the cartridge 3 for use. Figure 7 This is a cross-sectional view showing the state where the push rod 8 has reached its forward limit. When the push rod 8 moves forward, the elastic part 10 located behind the push rod 8 does not exert force on the push rod 8, and the forward force generated by the elastic part 10 is released. That is, the elastic part 10 moves forward with the push rod 8 without exerting force on the push rod 8. After the cosmetic material M is used up, the box tube 3 is replaced relative to the container body 4. The order of replacing the box tube 3 will be explained below.

[0068] First, such as Figure 7 As shown, when the push rod 8 moves forward, the spring 9, which is sandwiched between the partition wall 5f and the elastic part 10 of the relay cylinder 5, shortens. When the box cylinder 3 is removed from the container body 4 in this state, the engagement of the internal thread 3m with respect to the external thread 8b is released, therefore, as Figure 8As shown, the shortened spring 9 extends, and the spring 9 exerts a force on the elastic part 10 and the push rod 8 rearward. Due to the rearward force generated by the spring 9, the elastic part 10 and the push rod 8 move rearward, and the elastic part 10 approaches or abuts against the bottom 6q of the operating body 6.

[0069] When the elastic part 10 is close to or abutting against the bottom 6q, the new box tube 3 is attached to the container body 4, as follows: Figure 9 As shown, the internal thread portion 3D of the box cylinder 3 enters the first smooth surface 5p, the inclined surface 5q, and the second smooth surface 5r of the container body 4 (relay cylinder 5). When no external force is applied to the internal thread portion 3D, the inner diameter of the internal thread 3m of the internal thread portion 3D is, for example, larger than the outer diameter of the external thread 8b of the push rod 8.

[0070] However, when the internal thread portion 3D enters the rear side of the inclined surface 5q, the protrusion 3w abuts against the inclined surface 5q, and the internal thread portion 3D flexes radially inward, thereby engaging the internal thread 3m of the internal thread portion 3D with the external thread 8b of the push rod 8. In this way, by allowing the internal thread portion 3D (protrusion 3w) to enter the rear side of the inclined surface 5q, the internal thread 3m can be engaged with the external thread 8b, and the box 3 can be installed onto the container body 4. Therefore, the installation of a new box 3 onto the container body 4 can be performed efficiently.

[0071] Next, the effects of the box-type cosmetic dispensing container 1 of this embodiment will be described in detail. In the box-type cosmetic dispensing container 1, the box 3 contains cosmetic M, and the box 3 is designed to be easily detachable from the container body 4. Therefore, when cosmetic M is used up, the box 3 can be removed from the container body 4 and a new box 3 can be attached to the container body 4. Thus, when cosmetic M is used up, only the box 3 needs to be replaced, and the container body 4 and the push rod 8 can be reused without being discarded, thereby reducing the number of discarded parts. Therefore, the box-type cosmetic dispensing container 1 can be designed to be environmentally friendly.

[0072] An elastic part 10 is disposed inside the container body 4, and the elastic part 10 is configured to apply force forward to the push rod 8. When the box 3 is removed from the container body 4, the push rod 8 is applied force forward by the elastic part 10. Specifically, when the push rod 8 is pressed back, the elastic part 10, which is close to or abuts the bottom 6q of the operating body 6, flexes and applies force forward to the push rod 8. On the other hand, when the box 3 is attached to the container body 4 and the push rod 8 moves forward, the forward force applied by the elastic part 10 is released. Therefore, when the push rod 8 moves forward, the elastic part 10 does not apply force to the push rod 8, so the length of the elastic part 10 can be designed to be shorter than that of a pressing spring that applies force to the push rod when it moves forward. As a result, the length of the elastic part 10 can be shortened, thereby reducing the deviation of the force applied by the elastic part 10 to the push rod 8, and thus the attachment of the box 3 to the push rod 8 can be easily performed.

[0073] In the present embodiment, the elastic portion 10 is connected to the push rod 8. In this case, the elastic portion 10 moves together with the push rod 8, and thus the installation of the elastic portion 10 can be easily performed.

[0074] In the present embodiment, the elastic portion 10 has a rotation-stopping portion (for example, the first rotation-stopping portion 11 and the second rotation-stopping portion 13) on the outer surface, which engages with the inner surface of the container body 4 in the rotation direction D2 and causes the push rod 8 and the operation body 6 to rotate in synchronization. In this case, the elastic portion 10 is provided with the rotation-stopping portion, and thus the length of the elastic portion 10 and the rotation-stopping portion can be shortened as compared with the case where the rotation-stopping portion and the elastic portion 10 are separately provided. Thus, the compactness of the components can be facilitated.

[0075] In the present embodiment, the push rod 8 is integrally formed with the elastic portion 10. In this case, the number of components of the box-type cosmetic product push-out container 1 can be reduced, and thus the box-type cosmetic product push-out container 1 can be easily manufactured.

[0076] In the present embodiment, the cartridge 3 can also have a cylindrical internally threaded portion 3D formed with an internal thread 3m. The internally threaded portion 3D is configured to be elastically deformable in the radial direction of the internally threaded portion 3D by a slit 3s that communicates the inside and outside of the internally threaded portion 3D. In this case, when the cartridge 3 is attached to the container body 4, the internally threaded portion 3D can be elastically deformed to the inside in the radial direction to engage the internal thread 3m with the external thread 8b of the push rod 8. Thus, the screwing of the internal thread 3m and the external thread 8b at the time of attaching the cartridge 3 can be easily performed.

[0077] The above describes the embodiments of the box-type cosmetic product push-out container of the present disclosure. However, the box-type cosmetic product push-out container of the present disclosure is not limited to the above-described embodiments, and can be modified within a range where the gist described in each technical solution is not changed, and further be used for other box-type cosmetic product push-out containers. That is, the shape, size, number, material, and arrangement of each component constituting the box-type cosmetic product push-out container can be appropriately changed within the above-described gist.

[0078] For example, in the above-described embodiments, the operation body 6 is described as being cylindrical. However, the shape of the operation body can also be a shape other than a cylindrical shape, and is not particularly limited. Further, in the above-described embodiments, an example in which the operation body 6, which is a part of the container body 4, relatively rotates in one direction with respect to the cartridge 3 is described. In this way, in the box-type cosmetic product push-out container of the present disclosure, a part of the container body can also relatively rotate in one direction with respect to the cartridge. Further, in the box-type cosmetic product push-out container of the present disclosure, the entire container body can also relatively rotate with respect to the cartridge.

[0079] In the above-described embodiment, the elastic portion 10 integrated with the push rod 8 is described. However, the elastic portion can not be integrated with the push rod. For example, the elastic portion can be provided as a separate member from the push rod and attached to the push rod. Further, in the above-described embodiment, the example in which the elastic portion 10 is attached to the push rod 8 is described. However, the elastic portion can not be attached to the push rod. Further, in the above-described embodiment, the elastic portion 10 provided with the first rotation stopping portion 11 and the second rotation stopping portion 13 and provided with the spring portion 12 between the first rotation stopping portion 11 and the second rotation stopping portion 13 is described. However, the number of rotation stopping portions provided to the elastic portion is not particularly limited to one or more than three. The position of the rotation stopping portion is also not particularly limited. Also, the elastic portion can not have a rotation stopping portion.

[0080] In the above-described embodiment, the cartridge-type cosmetic push-out container 1 capable of performing the relative rotation of the operation body 6 with respect to the cartridge 3 in one direction and capable of performing only the push-out of the cosmetic M is described. However, the cartridge-type cosmetic push-out container of the present disclosure can be a cartridge-type cosmetic push-out container capable of performing the relative rotation in one direction and the opposite direction of the one direction.

[0081] In the above-described embodiment, the example in which the cosmetic M has volatility is described. However, the cosmetic of the present disclosure can be a lipstick, a lip gloss, an eye shadow, an eyeliner, or the like, or a cosmetic composed of a paste or a liquid (semi-solid). Thus, the cartridge-type cosmetic push-out container of the present disclosure can be applied to various cosmetics.

[0082] (1) The cartridge-type cosmetic push-out container of the present disclosure is a cartridge-type cosmetic push-out container 1 provided with:

[0083] a cartridge 3 in which a cosmetic M is accommodated;

[0084] a container body 4 configured to be detachable from the cartridge;

[0085] a push rod 8 accommodated in the container body and advancing inside the cartridge to push out the cosmetic in the front direction,

[0086] an internal thread 3m formed on an inner surface of the cartridge and an external thread 8b formed on an outer surface of the push rod,

[0087] the container body 4 including an operation body 6 configured to be relatively rotatable with respect to the cartridge,

[0088] with the relative rotation of the operation body 6 with respect to the cartridge 3, the screwing action of the internal thread 3m and the external thread 8b is exerted, the push rod 8 advances to push out the cosmetic M,

[0089] The cartridge cosmetic push-out container 1 is provided with:

[0090] an elastic portion 10 configured to apply a force to the push rod 8 in the forward direction inside the container body 4; and

[0091] a spring 9 configured to apply a force to the push rod 8 in the rearward direction inside the container body 4,

[0092] when the cartridge 3 is detached from the container body 4, the push rod 8 moved in the rearward direction by the spring 9 is applied with a force in the forward direction by the elastic portion 10,

[0093] when the cartridge 3 is attached to the container body 4 and the push rod 8 advances with the relative rotation of the operation body 6 with respect to the cartridge 3, the application of the force in the forward direction to the push rod 8 by the elastic portion 10 is released.

[0094] (2) In the cartridge cosmetic push-out container described in the above (1), the elastic portion 10 is connected to the push rod 8.

[0095] (3) In the cartridge cosmetic push-out container described in the above (1) or (2), the elastic portion 10 has a rotation-stopping portion 11, 13 on the outer surface, the rotation-stopping portion 11, 13 being engaged with the inner surface of the container body 4 in the rotational direction to synchronize the rotation of the push rod 8 and the operation body 6.

[0096] (4) In the cartridge cosmetic push-out container described in any one of the above (1) to (3), the push rod 8 is integrally formed with the elastic portion 10.

[0097] (5) In the cartridge cosmetic push-out container described in any one of the above (1) to (4), the cartridge 3 has a cylindrical inner thread portion 3D in which the inner thread 3m is formed,

[0098] the inner thread portion 3D is configured to be elastically deformed in the radial direction of the inner thread portion by having a slit that communicates the inside and the outside of the inner thread portion 3D.

[0099] (6) In the cartridge cosmetic push-out container described in the above (3), the rotation-stopping portion 11, 13 has a first rotation-stopping portion 11 disposed in front of the elastic portion 10 and a second rotation-stopping portion 13 disposed behind the elastic portion 10.

[0100] (7) In the cartridge cosmetic push-out container described in the above (6), the elastic portion 10 has a spring portion disposed between the first rotation-stopping portion 11 and the second rotation-stopping portion 13.

Claims

1. A cartridge-type cosmetic product ejecting container, comprising: a cartridge cylinder containing a cosmetic product; and a push rod housed in a container main body and advancing inside the cartridge cylinder to eject the cosmetic product forward, wherein an internal thread is formed on an inner surface of the cartridge cylinder, and an external thread is formed on an outer surface of the push rod, the container main body includes an operation body configured to be relatively rotated with respect to the cartridge cylinder, the push rod advances to eject the cosmetic product forward as a result of a screwing action of the internal thread and the external thread due to the relative rotation of the operation body with respect to the cartridge cylinder, the cartridge-type cosmetic product ejecting container comprises: an elastic portion configured to apply a force to the push rod forward inside the container main body; and a spring configured to apply a force to the push rod rearward inside the container main body, the push rod, which has moved rearward by the spring when the cartridge cylinder is detached from the container main body, is forced forward by the elastic portion, the application of the force to the push rod forward by the elastic portion is released when the cartridge cylinder is attached to the container main body and the push rod advances as a result of the relative rotation of the operation body with respect to the cartridge cylinder, the elastic portion has a rotation-stopping portion on an outer surface, the rotation-stopping portion engages with an inner surface of the container main body in a rotational direction to synchronize rotation of the push rod and the operation body, the elastic portion has: a first rotation-stopping portion and a second rotation-stopping portion as the rotation-stopping portion; and a spring portion provided between the first rotation-stopping portion and the second rotation-stopping portion.

2. The cartridge-type cosmetic product ejecting container according to claim 1, wherein the elastic portion is connected to the push rod. a container body configured to allow the cartridge to be attached to and detached from the container body; and 3. The cartridge-type cosmetic product ejecting container according to claim 1, wherein the push rod is integrally formed with the elastic portion.

4. The cartridge-type cosmetic product ejecting container according to any one of claims 1 to 3, wherein the cartridge cylinder has a cylindrical internal thread portion in which the internal thread is formed, and the internal thread portion is configured to be elastically deformed in a radial direction of the internal thread portion by having a slit that communicates an inside and an outside of the internal thread portion.

5. The cartridge-type cosmetic product ejecting container according to claim 1, wherein the first rotation-stopping portion is disposed forward of the elastic portion, and the second rotation-stopping portion is disposed rearward of the elastic portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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