Refill unit for sunscreen and refill type stick container provided with the same

Abstract

To provide a refill unit of a stick type sunscreen product and a refill type stick container provided with the same.SOLUTION: A refill unit comprises a lifting shell 600 in which a shell space opened upward is formed inside, and a holder 700 arranged movably in a vertical direction inside the shell space. The lifting shell 600 contains a shell body 610 having an insertion hole 630 in its lower surface, and a shell engagement part 650 provided with a shell stepped jaw 670 which extends downward and protrudes in a lateral direction. The holder 700 contains a holder body 720 and a holder engagement part 740 provided with a holder stepped jaw 760 which extends downward and protrudes in the lateral direction. When the refill unit moves toward a container assembly under a condition where the holder 700 is at a lowest position in the shell space, the shell engagement part 650 is coupled to a connector 400 of the container assembly, and the holder engagement part 740 is coupled to a shaft 300 of the container assembly.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a container for a sunscreen, and more particularly to a refillable stick container having a refill unit that enables refilling of a stick-type sunscreen product. [Background technology]

[0002] A stick-type product is a product that uses a stick material in which a composition containing necessary ingredients is solidified in a solid form, and a stick container for this purpose is generally provided with a structure in which most of the stick material is stored inside the container, but the stick container is provided with a structure that allows the user to operate it so that only a part of the stick material is exposed to the outside as needed. That is, as the stick-type product is used, the exposed upper part of the stick material is consumed, and as the upper part of the stick material wears down, the height gradually decreases, and the stick container moves the stick material further up to maintain the exposed state of the stick material. In recent years, in addition to cosmetics such as lipstick and lip balm, products for various purposes such as sunscreen, deodorant, stick glue, and ointment are provided in stick form.

[0003] Stick-type products are generally used while being portable, and therefore are manufactured in a relatively small size. The small size of stick-type products limits the amount of usable content, and requires higher precision in the manufacture of stick containers. On the other hand, in order to use stick materials, as described above, a complex structure is required for moving the stick materials up and down, and therefore higher manufacturing costs are required compared to general containers. If stick containers were manufactured in a refillable form so that such stick containers, which are manufactured at high cost and have complex structures, can be recycled even after the stick materials have been used up, waste of resources could be significantly reduced.

[0004] Among stick-type products, stick-type sunscreen products, also known as "sun sticks", are applied over a relatively large area each time they are used, and therefore the stick material is made with a large width. Therefore, in order to manufacture stick containers for sunscreen, deodorant, etc. in a refillable form, it is necessary to firmly fix the refill unit over the entire width of the stick material. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the present invention has been devised to solve the above-mentioned problems, and an object of the present invention is to provide a refillable unit and a refillable stick container that can provide high bonding strength while allowing easy refilling.

[0006] Other objects of the present invention will become clearer on the basis of the embodiments described below. [Means for solving the problem]

[0007] One aspect of the present invention provides a refill unit configured to move forward to be coupled to a container assembly. The refill unit according to one aspect of the present invention may include a lift-up shell forming an internal shell space that extends a predetermined length in the left-right direction and a predetermined length in the up-down direction and is open upward; and a holder arranged within the shell space to be movable along the up-down direction, the lift-up shell may include a shell main body forming the shell space internally and having an insertion hole formed on a lower surface thereof; and a shell engagement part extending downward from a lower surface of the shell main body and having a shell step jaw protruding laterally at a lower portion thereof, and the holder may include a holder body arranged within the shell space; and a holder engagement part extending downward from a lower surface of the holder body at a position corresponding to the center of the insertion hole and having a holder step jaw protruding laterally at a lower portion thereof. Here, when the holder is at the lowest position within the shell space, the holder engagement portion can be exposed below the underside of the shell body through the insertion hole, and when the refill unit moves forward toward the container assembly with the holder at the lowest position within the shell space, the shell engagement portion can be coupled to the connector of the container assembly, and the holder engagement portion can be coupled to the shaft of the container assembly.

[0008] The refill unit according to the present invention may have one or more of the following embodiments: For example, the lower surface of the holder body may be formed with a first alignment protrusion extending downward, the holder engagement portion being disposed therein at a position corresponding to the edge of the insertion hole, and the first alignment protrusion may be inserted into the insertion hole when the holder is at the lowest position in the shell space.

[0009] An alignment hole may be formed in a lower surface of the shell main body, the shell engaging portion may be formed in a shape surrounding the alignment hole, and a second alignment protrusion extending downward may be formed in a lower surface of the holder body. When the holder is at a lowest position in the shell space, the second alignment protrusion may be inserted into the alignment hole.

[0010] The lifting shell may further include a stopper block extending downward from a rear lower portion of the shell body to hide the rear side of the shell engaging portion and having a stopper surface facing forward on a side thereof.

[0011] When the shell step protrudes outward from the lower portion of the shell engaging portion, at least one of a locking protrusion and a locking groove may be formed on an outer circumferential surface of the shell engaging portion.

[0012] The shell engaging portion may extend downward to form a shell engaging space on the inside, and when the shell step protrudes inward from a lower portion of the shell engaging portion, the shell engaging portion may be configured to be open at the front side and the shell engaging space may be open at the top and front sides. In this case, at least one of a locking protrusion and a locking groove may be formed on the inner peripheral surface of the shell engaging portion.

[0013] Another aspect of the invention provides a refillable stick container configured to have a forward moving refill unit coupled to its top. A refillable stick container according to one aspect of the present invention may include: a connector having a connector engagement portion configured to couple to a lifting shell of the refill unit, the connector having a through hole formed on an upper surface thereof; a socket cylinder configured to be rotatable relative to the connector, the socket cylinder forming a socket space therein and a screw guide having a socket screw formed on an inner circumferential surface thereof; a shaft engagement portion located above the through hole and an extension body at least a portion of which is located within the socket space, the shaft engagement portion being configured to couple to a holder of the refill unit, the extension body having a shaft screw formed on a surface thereof configured to mesh with the socket screw, the connector engagement portion may extend upwardly from an upper surface of the connector and may have a connector step jaw protruding laterally at an upper portion thereof, the shaft engagement portion may extend upwardly from an upper portion of the extension body and may have a shaft step jaw protruding laterally at an upper portion thereof, and when the refillable unit moves forward toward the connector, the connector engagement portion may be coupled to the lifting shell and the shaft engagement portion may be coupled to the holder.

[0014] The refillable stick container according to the present invention may have one or more of the following embodiments. For example, the refillable stick container may further include a container body coupled to the connector and the screw guide. The container body may be fixed relative to the connector, and the screw guide may be coupled to the container body so as to be rotatable relative to the container body.

[0015] The shaft engagement portion extends upward to form a shaft engagement space inward, and when the shaft step jaw protrudes inward from the upper part of the shaft engagement portion, the shaft engagement portion can be configured so that the rear side is open and the shaft engagement space is open to the upper and rear sides.

[0016] The connector may further include a front block extending upward from an upper portion of a front side of the connector to hide the front side of the connector engaging portion and the shaft engaging portion. The front block may have a contact surface formed on a side thereof facing the rear side, and the refill unit may include a stopper block having a stopper surface facing the front side, and when the refill unit is coupled, the stopper surface may be in close contact with the contact surface.

[0017] Yet another aspect of the present invention provides a refillable stick container. The refillable stick container according to one aspect of the present invention can include a lifting shell that extends a predetermined length in the left-right direction and a predetermined length in the up-down direction and forms an upwardly open shell space therein; a holder that is arranged to be movable in the up-down direction within the shell space; a connector that includes a connector engagement part configured to be coupled to the lifting shell and has a through hole formed on its upper surface; a screw guide that is configured to be rotatable relative to the connector and includes a socket cylinder, the socket cylinder forming a socket space therein and having a socket screw formed on its inner circumferential surface; and a shaft that includes a shaft engagement part located above the through hole and an extension body at least a part of which is located within the socket space, the shaft engagement part being configured to be coupled to the holder, and a shaft screw configured to mesh with the socket screw being formed on a surface of the extension body. Here, the lifting shell can include a shell main body that forms the shell space therein and has an insertion hole formed on its lower surface; and a shell engagement part that extends downward from the lower surface of the shell main body and has a shell step jaw that protrudes laterally at its lower part. The holder may include a holder body disposed inside the shell space; and a holder engagement portion extending downward from a lower surface of the holder body at a position corresponding to the center of the insertion hole and having a holder step jaw protruding laterally at a lower portion. The connector engagement portion may extend upward from an upper surface of the connector and have a connector step jaw protruding laterally at an upper portion, and the shaft engagement portion may extend upward from an upper portion of the extension body and have a shaft step jaw protruding laterally at an upper portion. When the holder is at the lowest position in the shell space, the holder engagement portion may be exposed below the lower surface of the shell body through the insertion hole, and when the lifting shell moves forward toward the connector with the holder at the lowest position in the shell space, the shell step jaw may engage with the connector step jaw, and the shell engagement portion may be coupled to the connector engagement portion, and the holder step portion may engage with the shaft step jaw, and the holder engagement portion may be coupled to the shaft engagement portion. Effect of the Invention

[0018] According to the means for solving the problems of the present invention as described above, various effects including the following can be expected. However, the present invention is not established unless all of the following effects are achieved.

[0019] The stick container and refill unit according to one embodiment of the present invention allows the refilling of stick products having a large lateral length, such as sunscreens and deodorants.

[0020] The stick container and refill unit according to one embodiment of the present invention provide a structure that is easy to assemble and retains high bond strength after assembly. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view illustrating an exemplary stick container according to one embodiment of the present invention. [Diagram 2] 1 is a cross-sectional view illustrating an example of a stick container according to one embodiment of the present invention. [Diagram 3] 1 is a cross-sectional view illustrating an example of a stick container according to one embodiment of the present invention. [Figure 4] 1 is a diagram illustrating an example of a container body of a stick container according to one embodiment of the present invention. FIG. [Diagram 5] FIG. 2 is a perspective view illustrating an example of a screw guide of a stick container according to one embodiment of the present invention. [Figure 6] FIG. 2 is a perspective view illustrating an example of a dial of a stick container according to one embodiment of the present invention. [Figure 7] 1 is a perspective view illustrating an example of a state in which a container body, a screw guide, and a dial are combined in a stick container according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same or corresponding components will be given the same reference numbers regardless of the drawing symbols, and duplicate descriptions thereof will be omitted.

[0023] For convenience of explanation, expressions such as "front side", "rear side", "inside", "outside", "upper part" and "lower part" are used in this specification. In the following explanation, the inside of the direction in which the lifting shell assembly (i.e., the assembly of the lifting shell 600 and the holder 700) moves to be coupled to the container assembly (i.e., the assembly of the shaft 300, the connector 400, the container body 1100, the screw guide 1200 and the dial 1300) is referred to as "front". "Front-rear direction" refers to the direction connecting the front and rear, "left-right direction" refers to the direction connecting the left and right, and "lateral direction" is a concept that includes the front-rear direction and the left-right direction. "Inside" refers to the side closer to the inside of the component or the stick container 2000 to be described, and "outside" refers to the side farther from the inside of the component or the stick container 2000. Meanwhile, "upper part" and "lower part" are based on the case where the stick container 2000 is arranged as shown in FIG. 2. During actual use of the refillable stick container 2000 according to one embodiment of the present invention, the upper direction, front direction, etc. referred to in this specification may not coincide with the actual upper direction, front direction, etc.

[0024] The stick container 2000 according to one embodiment of the present invention presented below is configured to accommodate a stick material 10 such as a sunscreen, deodorant, etc. In this case, the stick material 10 is required to be applied quickly by the user over a large area, and therefore the stick material 10 is generally made to have a larger length in the left-right direction.

[0025] Fig. 1 is a perspective view showing an example of a stick container 2000 according to an embodiment of the present invention, and Fig. 2 and Fig. 3 are cross-sectional views showing the stick container 2000 according to an embodiment of the present invention cut along the left-right direction and the front-back direction, respectively. Fig. 4, Fig. 5 and Fig. 6 respectively show an example of the container body 1100, the screw guide 1200 and the dial 1300 of the stick container 2000, and Fig. 7 shows an example of a state in which these are joined together.

[0026] The stick container 2000 according to an embodiment of the present invention corresponds to a container that stores a stick material 10 such as sunscreen, deodorant, etc., and allows a user to use it. The stick material 10 is provided on the top of the holder 700 from inside the lift-up shell 600, and can be moved up and down by a user rotating the dial 1300. The stick container 2000 according to an embodiment of the present invention may include a container assembly, a lift-up shell assembly, and a cap assembly. In an embodiment of the present invention, the container assembly refers to a part including the shaft 300, the connector 400, and the screw guide 1200, the lift-up shell assembly refers to a part including the lift-up shell 600 and the holder 700, and the cap assembly refers to a part including the inner cap 910 and the overcap 920. The lift-up shell assembly may also constitute a refill unit that is distributed separately.

[0027] The container assembly of the stick container 2000 serves to support the lifting shell assembly, and also serves to lift and lower the holder 700 in response to a user's operation. In the stick container 2000 according to one embodiment of the present invention, the container assembly may include a shaft 300, a connector 400, a container body 1100, a screw guide 1200, and a dial 1300.

[0028] The shaft 300 corresponds to a portion that interacts with the socket screw 1260 of the screw guide 1200 and moves in the up and down direction according to a user's operation. In an embodiment of the present invention, the shaft 300 may include an extension body 310, a shaft engaging portion 350, a shaft screw 360, and a brake protrusion 370.

[0029] The extension body 310 can extend long along the vertical direction as a main part of the shaft 300, and can be configured to be disposed inside the socket screw 1260 of the socket cylinder 1240 and pass through the through hole of the connector 400. The extension body 310 can have a cross section that is not circular so as not to rotate relative to the connector 400 while moving in the vertical direction. For example, in the example shown in the figure, the cross section of the extension body 310 of the shaft 300 is formed long in one direction, the two long sides of the cross section are flat, and the two short sides are arc-shaped.

[0030] The shaft engaging portion 350 is located above the through hole of the connector 400 and can be configured to be coupled with the holder engaging portion 740 of the holder 700. The shaft engaging portion 350 extends upward from the upper portion of the extension body 310, and the shaft step jaw 390 provided on the upper portion can protrude laterally. In the example shown in FIG. 2, the shaft engaging portion 350 extends upward to form a shaft engaging space on the inside, and the holder engaging portion 740 is inserted into the shaft engaging space. The shaft step jaw 390 protrudes inward from the upper portion of the shaft engaging portion 350 and hooks onto the holder step portion 760 of the holder engaging portion 740 located below it. Of course, the shaft step jaw 390 may protrude outward in the shaft engaging portion 350, and the holder step jaw 760 may protrude inward in the holder engaging portion 740.

[0031] The shaft screw 360 may be formed over the entire extension 310 of the shaft 300 and may protrude outward from both sides of the outer circumferential surface of the extension 310. That is, the shaft screw 360 may be formed on the short side of the outer circumferential surface of the extension 310 that forms an arc. As described above, the shaft screw 360 may be formed only at a predetermined position on the extension 310, and the socket screw 1260 may be formed over the entire inner circumferential surface of the socket cylinder 1240.

[0032] The shaft 300 may be disposed so that the shaft screw 360 engages with the socket screw 1260 inside the socket cylinder 1240 of the screw guide 1200. When the dial 1300 is rotated by a user's operation, the socket screw 1260 rotates, but the shaft 300 cannot rotate together with the socket screw 1260 due to the extension body 310 disposed so as not to rotate. As the socket screw 1260 rotates, the shaft screw 360 engaged therewith moves along the socket screw 1260, but as the shaft 300 cannot rotate, the shaft screw 360 and the shaft 300 including it move in the vertical direction without rotating.

[0033] The brake protrusion 370 may protrude outward from a position on the lower part of the extension 310 where the shaft screw 360 is not formed. For example, the brake protrusion 370 may be formed on a long side of the lower part of the extension 310 that forms a flat surface.

[0034] The connector 400 corresponds to a portion that connects the container assembly and the lifting shell assembly to each other. In one embodiment of the present invention, the lifting shell assembly can constitute a refill unit by itself, and when the contents of one stick container 2000 are used up, the lifting shell assembly with the used up contents can be replaced with the lifting shell assembly of a new refill unit. Therefore, the connector 400 can be configured to removably connect the lifting shell assembly to the container assembly. In one embodiment of the present invention, the stick material 10 and the lifting shell 600 that accommodates it have a large length along the left-right direction, and therefore the connector 400 can also have a large length along the left-right direction. The connector 400 can mainly include a connector base 410, a support cylinder 420, a connector engagement portion 440, an inner engagement portion 470, and a front block 480.

[0035] The connector base 410 can form the upper surface of the connector 400, and the connector base 410 can have a through hole through which the shaft 300 can pass. The through hole can be formed inside the inner engagement portion 470. For example, in the example shown in FIG. 2, the inner engagement portion 470 is formed on both the left and right sides of the through hole of the connector base 410, and the clearance hole 475 is formed on both the left and right sides of the inner engagement portion 470. The through hole has a shape and size corresponding to the cross section of the extension body 310, and can be configured to allow the extension body 310 to pass through. In the example shown in FIG. 2, the through hole is formed to a size that the connector engagement portion 440 cannot pass through.

[0036] The support cylinder 420 may have a hollow shape with an open bottom, and the bottom may be inserted inside the container body 1100. The support cylinder 420 may have a non-circular cross section because it does not need to directly contact a rotating component. An engagement protrusion 423 for coupling with the container body 1100 may be formed on the outer surface of the support cylinder 420.

[0037] The connector engaging portion 440 is located at the top of the connector 400 and can be configured to couple with the shell engaging portion 650 of the lifting shell 600. In this embodiment, the lifting shell 600 and the connector 400 also have a large length in the left-right direction in order to accommodate the stick material 10 having a large length in the left-right direction, and the connector 400 can have a plurality of connector engaging portions 440 corresponding to this. The connector engaging portion 440 may be provided on both sides of the through hole through which the shaft engaging portion 350 passes, as in the example shown in FIG. 2. In some embodiments, one of the connector engaging portions 440 may be formed to surround the through hole.

[0038] The connector engaging portion 440 extends upward from the connector base 410, and the connector step jaw 450 provided at the upper portion can protrude laterally. In the example shown in FIG. 2, the connector engaging portion 450 extends upward to form a connector engaging space inside, and the shell engaging portion 650 is inserted into the connector engaging space. The connector step jaw 450 protrudes inward from the upper portion of the connector engaging portion 650 and is hooked onto the shell step jaw 670 of the shell engaging portion 650 located below it. Of course, the connector engaging portion 440 and the shell engaging portion 650 may have different shapes, with the connector step jaw 450 protruding outward and the shell step jaw 670 protruding inward.

[0039] Although not shown in Fig. 2 and Fig. 3, a locking groove (not shown) may be formed in the connector jaw 450. The locking groove (not shown) may be gently curved and formed in a concave shape. When the lift-up shell assembly is coupled to the container assembly, a locking protrusion (not shown) of a shell engagement portion 650 (described later) is inserted into the locking groove (not shown) of the connector jaw 450, enabling a stronger engagement.

[0040] The inner engagement part 470 is formed at the bottom of the connector base 410 and can function to connect the connector 400 to the container body 1100 while fixing the shaft 300. The inner engagement part 470 can be formed at a position corresponding to the shaft 300, and a through hole can be formed inside the inner engagement part 470. In the example shown in FIG. 2, clearance holes 475 are formed on both the left and right sides of the inner engagement part 470.

[0041] The inner engagement portion 470 may have an engagement protrusion 471 formed on its outer surface based on the left-right direction, and a seating step jaw 473 formed on its inner surface. The engagement protrusion 471 meshes with the engagement protrusion 1162 of the container body 1100, and serves to firmly engage the connector 400 and the container body 1100, and the seating step jaw 473 can support the shaft engagement portion 350 when the shaft 300 is lowered to the maximum.

[0042] The front block 480 may extend upward from the upper front portion of the connector 400 to hide the front sides of the connector engaging portion 440 and the shaft engaging portion 350. The front block 480 may extend along the edge of the connector base 410 and may be formed over the entire front side of the connector 400.

[0043] A contact surface (not shown) facing the rear side may be formed on a side of the front block 480 with the rear side cut along a plane. The contact surface 460 may be formed to be inclined relatively to the up-down direction and may be configured to contact a stopper surface (not shown) of a stopper block 680 formed on the lift-up shell 600. In this embodiment, the connector 400 may include a plurality of connector engaging portions 440, and the contact surface (not shown) may be formed on the front block 480 formed on the entire connector 400.

[0044] In the stick container 2000 according to an embodiment of the present invention, the container body 1100 can be coupled to the connector 400 and the screw guide 1200. In an embodiment of the present invention, since the stick material 10 has a large width, it is easier to use a structure including a separately rotating part rather than rotating the container body itself. In this embodiment, the container body 1100 does not rotate itself, but exposes a dial 1300 configured to be rotated by the user. Referring to FIG. 4, the container body 1100 according to this embodiment can include a bottom 1110, an outer wall 1120, an inner wall 1130, a fixed cylinder 1140, an enlarged diameter part 1150, and an engagement part 1160.

[0045] The bottom 1110 may form the entire underside of the container body 1100 and the stick container 2000, and the outer wall 1120 may extend upward from the edge of the bottom 1110. The bottom 1110 and the outer wall 1120 may form part of the exterior of the container body 1100 and the stick container 2000. An engagement protrusion 1122 may be formed on the inner surface of the outer wall 1120. The engagement protrusion 1122 may mate with an engagement protrusion 423 formed on the support cylinder 420 of the connector 400.

[0046] In one embodiment of the present invention, an exposure groove 1125 may be formed in the lower portion of the container body 1100. The exposure groove 1125 may be open, for example, to the front side, the rear side, or both the front and rear sides of the container body 1100, and the outer wall 1120 may have a corresponding shape. In some embodiments, the exposure groove 1125 may be omitted, and the dial 1300 may be exposed below the bottom 1110.

[0047] When the container body 1100 has the exposed groove 1125 formed therein, the container body 1100 can include an inner wall 1130 that defines the exposed groove 1125. As shown in FIG. 4, the inner wall 1130 and a platform 1132 formed thereon can form the exposed groove 1125 in which the dial 1300 is located.

[0048] The fixed cylinder 1140 is a part that serves to fix the screw guide 1200 therein. The fixed cylinder 1140 may extend upward from the bottom 1110 or the upper surface of the platform 1132, and may have a hollow shape that is open at the top and bottom. The fixed cylinder 1140 may have a cylindrical shape except for the position corresponding to the enlarged diameter portion 1150 as shown in FIG. 4, and may have a completely cylindrical shape even at the position corresponding to the enlarged diameter portion 1150. An installation space 1145 into which the screw guide 1200 is inserted may be formed inside the fixed cylinder 1140. The fixed cylinder 1140 may be designed so that the height of its upper end corresponds to the lower surface of the fixing protrusion 1242 of the screw guide 1200.

[0049] The enlarged diameter portion 1150 may be formed in an arc shape having a diameter larger than that of the fixed cylinder 1140 on both sides of the fixed cylinder, and the engagement portion 1160 may further extend upward from the enlarged diameter portion 1150. An engagement protrusion 1162 may protrude outward from the upper portion of the engagement portion 1160, which may be used for engagement between the container body 1100 and the connector 400.

[0050] The screw guide 1200 corresponds to a portion that rotates by a user's operation to raise and lower the shaft 300. Referring to Fig. 5, the screw guide 1200 according to the present embodiment may include a guide base 1210, a socket cylinder 1240, a socket screw 1260, an outer ring 1280, and an inner ring 1290.

[0051] The guide base 1210 may have an annular shape and may support the remainder of the screw guide 1200 .

[0052] The socket cylinder 1240 may extend upward from the guide base 1210. The socket cylinder 1240 may have a hollow cylindrical shape, and a socket space 1205 may be formed therein into which the extension 310 of the shaft 300 may be inserted. The outer diameter of the socket cylinder 1240 may correspond to the inner diameter of the fixed cylinder 1140. A socket screw 1260 may be provided inside the socket cylinder 1240 and may face the socket space 1205.

[0053] A fixing protrusion 1242 may protrude outward from the upper portion of the socket cylinder 1240, and a margin slit 1245 may also be formed in the upper portion of the socket cylinder 1240. The margin slit 1245 may continue from a predetermined position on the socket cylinder 1240 to the upper end of the socket cylinder 1240.

[0054] The socket screw 1260 may be formed on the inside of the socket cylinder 1240. The socket screw 1260 may be formed in a spiral shape protruding inward from the inside of the socket cylinder 1240 to form a kind of female screw. The socket screw 1260 may be configured to mesh with the shaft screw 360 of the shaft 300, and as in the example shown in the figure, the shaft screw 360 may be formed over the entire extension 310 of the shaft 300 and the socket screw 260 may be formed only at a predetermined position, or conversely, the shaft screw 360 may be formed only at a predetermined position on the extension 310 and the socket screw 1260 may be formed over the entire inner circumferential surface of the socket cylinder 1240.

[0055] The outer ring 1280 and the inner ring 1290 may protrude from the bottom of the guide base 1210 toward the bottom. The outer ring 1280 and the inner ring 1290 may be formed in an annular shape, the outer ring 1280 may extend along the edge of the guide base 1210, and the inner ring 1290 may extend in an annular shape from the inside of the outer ring 1280 at a small distance from the outer ring 1280. The outer ring 1280 and the inner ring 1290 may be used to connect the dial 1300 to the screw guide 1200. For example, as shown in FIG. 2 and FIG. 3, the inner ring 1380 of the dial 1300 may be press-fitted into the gap between the outer ring 1280 and the inner ring 1290.

[0056] The outer ring 1280 may have one or more fixing grooves 1285. When the dial 1300 is coupled to the screw guide 1200, a fixing protrusion 1322 formed on the dial 1300 may be inserted into the fixing groove 1285, and the fixing protrusion 1322 may transmit a rotational force applied to the dial 1300 to the screw guide 1200.

[0057] The dial 1300 is engaged with the screw guide 1200 and is a portion that is gripped and rotated by a user. Referring to FIG. 6, the dial 1300 can include a base 1310, a side wall 1320, and an inner ring 1380.

[0058] The base 1310 may form the lower portion of the dial 1300 and may have a shape of a circular flat plate as a whole. The side wall 1320 may protrude upward from the base 1310 and may extend along the edge of the base 1310. The side wall 1320 of the dial 1300 corresponds to a portion that the user directly contacts when operating the stick container 2000. The side wall 1320 may be formed with projections and recesses so that the user can rotate the dial 1300 more smoothly. As shown in FIG. 1, the side wall 1320 of the dial 1300 may be exposed to the front and rear sides of the stick container 2000 through the exposed grooves 1125 of the container body 1100.

[0059] The inner circumferential surface of the side wall 1320 may be provided with one or more fixing protrusions 1322, which may protrude inward. As described above, when the dial 1300 is coupled to the screw guide 1200, the fixing protrusions 1322 may be inserted into the fixing grooves 1285, and when the user rotates the dial 1300, the fixing protrusions 1322 may transmit a rotational force to the screw guide 1200.

[0060] In the example shown in the drawings, a structure in which the dial 1300 is coupled to the screw guide 1200 is depicted for ease of manufacture and to improve the aesthetic appearance, but the dial 1300 may be configured as a part of the screw guide 1200. In other words, the stick container 2000 does not necessarily need to have a separate dial 1300, and a part of the screw guide 1200 can be exposed to the outside of the container body 1100 to serve as the dial 1300.

[0061] 7 is a perspective view showing an example of a state in which a container body 1100, a screw guide 1200, and a dial 1300 are combined in a stick container 2000 according to an embodiment of the present invention. When a shaft 300 and a connector 400 are further combined in the configuration shown in FIG. 7, this constitutes a container assembly.

[0062] To assemble the container assembly, the manufacturer can first manufacture each of the shaft 300, the connector 400, the container body 1100, the screw guide 1200, and the dial 1300. Although these components have somewhat complicated shapes, they can be manufactured without difficulty by, for example, a molding process using upper and lower molds, since all parts of each of the components are accessible from the top and bottom.

[0063] The dial 1300 may be coupled to the lower part of the screw guide 1200. With the fixing protrusion 1322 of the dial 1300 aligned with the fixing groove 1285 of the screw guide 1200, the manufacturer may press the screw guide 1200 and the dial 1300 toward each other, and the inner ring 1380 of the dial 1300 may be press-fitted between the outer ring 1280 and the inner ring 1290, and then the engagement protrusion formed on the outer circumferential surface of the guide base 1210 may be inserted into the engagement groove formed in the side wall 1320 of the dial 1300, thereby coupling the screw guide 1200 and the dial 1300.

[0064] The connector 400 can be coupled to the top of the container body 1100. The manufacturer can press the container body 1100 and the connector 400 toward each other so that the support cylinder 420 of the connector 400 is inserted into the open top of the container body 1100, and the container body 1100 and the connector 400 can be firmly coupled together while the engagement protrusion 423 of the support cylinder 420 engages with the engagement protrusion 1122 of the outer wall 1120 and the engagement protrusion 471 of the inner engagement portion 470 engages with the engagement protrusion 1162 of the engagement portion 1160.

[0065] In particular, when the engaging protrusion 1162 of the engaging portion 1160 encounters the engaging protrusion 471 of the inner engaging portion 470 while the connector 400 is moving upward, the engaging portion 1160 expands outward due to elastic deformation, and the inner engaging portion 470 contracts inward due to elastic deformation. During this process, the upper inclined surface of the engaging protrusion 1162 rises along the lower inclined surface of the engaging protrusion 471, and when the engaging protrusion 1162 passes the engaging protrusion 471, the lower surface of the engaging protrusion 1162 gets caught on the upper surface of the engaging protrusion 471.

[0066] The screw guide 1200 can be coupled to the lower part of the container body 1100. The manufacturer can move the socket cylinder 1240 upward at the exposed groove 1125 of the screw guide 1200 and insert it into the mounting space 1145. The outer diameter of the socket cylinder 1240 corresponds to the inner diameter of the fixed cylinder 1140, but the outer peripheral surface of the upper part of the socket cylinder 1240 is formed with a fixed protrusion 1242 that protrudes outward. However, since the socket cylinder 1240 is formed with an allowance slit 1245, it is possible to insert the socket cylinder 1240 into the inside of the fixed cylinder 1140.

[0067] When the manufacturer inserts the socket cylinder 1240 into the fixed cylinder 1140, the socket cylinder 1240 undergoes elastic deformation, the allowance slit 1245 shrinks, and the socket cylinder 1240 has a narrower width, so that the socket cylinder 1240 can enter the mounting space 1145. When the screw guide 1200 moves to the end, the fixed protrusion 1242 of the socket cylinder 1240 reaches the upper end of the fixed cylinder 1140, and the socket cylinder 1240 elastically returns to its original state, and the lower surface of the fixed protrusion 1242 hooks onto the upper end of the fixed cylinder 1140. In this state, the upper end of the dial 1300 is located below the platform 1132.

[0068] Meanwhile, when the screw guide 1200 is completely connected to the container body 1100, the upper end of the socket cylinder 1240 supports the inner engagement part 470 from the inside, so that the inner engagement part 470 cannot easily deform inward any more. Therefore, after the screw guide 1200 is connected to the container body 1100, the connector 400 connected to the container body 1100 cannot be easily separated.

[0069] In this manner, with the connector 400, the container body 1100, the screw guide 1200, and the dial 1300 connected to each other, the manufacturer can connect the shaft 300 to the screw guide 1200. This is done by inserting the extension 310 of the shaft 300 into the socket space 1205 of the socket cylinder 1240 through the through hole. The manufacturer can rotate the shaft 300 after the shaft screw 360 of the shaft 300 is engaged with the socket screw 1260 of the socket cylinder 1240, and since the shaft 300 cannot rotate relative to the connector 400 and the container body 1100, the shaft 300 can gradually descend while the screw guide 1200 and the dial 1300 rotate.

[0070] The lifting shell assembly of the stick container 2000 stores contents such as sunscreen, deodorant, etc. in the form of a stick material 10, and allows the user to adjust the degree to which the stick material is exposed by raising or lowering the stick material 10 according to the user's operation. In one embodiment of the present invention, the lifting shell assembly can constitute a refill unit, and when the contents are used up in one stick container 2000, the lifting shell assembly in which the contents are used up can be replaced with another refill unit. Therefore, the lifting shell assembly can be configured to be detachably coupled to the connector 400 of the container assembly. The lifting shell assembly can mainly include a lifting shell 600 and a holder 700.

[0071] The lifting shell 600 extends a predetermined length in the left-right direction and also extends a predetermined length in the up-down direction, is hollow, and can define a shell space inside. The shell space can accommodate the holder 700 and the contents in the form of a stick material 10 coupled thereto. When using the stick container 2000 according to one embodiment of the present invention, a user can hold the lifting shell 600 and / or the container body 1100 with one hand and hold the dial 1300 with the other hand, and perform an operation of rotating them relative to each other. The lifting shell 600 can include a shell body 610, a shell engagement portion 650, and a stopper block 680.

[0072] The shell body 610 may have a hollow columnar shape as a main part of the lifting shell 600. The shell body 610 may extend a predetermined length in the left-right and up-down directions and may have a shape that accommodates and surrounds the holder 700 and the stick 10 accommodated in the shell space inside. The upper part of the shell body 610 may be open, and the lower part may have a lower surface 620 that defines the lower part of the shell space, and the lower surface 620 of the shell body 610 may have an insertion hole 630 and an alignment hole 640 formed therein.

[0073] The holder engaging portion 740 of the holder 700 may be inserted into the insertion hole 630 formed on the lower surface 620 of the shell body 610. That is, the insertion hole 630 may provide a passage for the holder engaging portion 740 to be coupled with the shaft engaging portion 350. Meanwhile, the first alignment protrusion 770 of the holder 700 may also be inserted into the insertion hole 630. That is, when the holder 700 is at the lowest position in the shell space, the first alignment protrusion 770 may be inserted into the insertion hole 630.

[0074] A second alignment protrusion 780 provided on the holder 700 can be inserted into the alignment hole 640 formed on the lower surface 620 of the shell body 610. That is, when the holder 700 is at the lowest position in the shell space, the second alignment protrusion 780 can be inserted into the alignment hole 640.

[0075] The shell engaging portion 650 is provided on the lower surface 620 of the shell body 610 and can be configured to be coupled with the connector engaging portion 440 of the connector 400. In this embodiment, the lifting shell 600 and the connector 400 also have a large length in the left-right direction in order to accommodate the stick material 10 having a large length in the left-right direction, and the lifting shell 600 can have a plurality of shell engaging portions 650 corresponding to this. The shell engaging portion 650 may be provided on both sides of the insertion hole 630 through which the holder engaging portion 740 passes, as in the example shown in FIG. 2. In some embodiments, one of the shell engaging portions 650 may be formed to surround the insertion hole 630.

[0076] The shell engaging portion 650 extends downward from the lower surface 620 of the shell body 610, and the shell step jaw 670 provided at the lower portion can protrude laterally. In the example shown in FIG. 2, the shell engaging portion 650 is formed so as to extend downward and surround the area including the alignment hole 640. The shell step jaw 670 protrudes outward from the lower portion of the shell engaging portion 650 and hooks onto the connector step jaw 450 of the connector engaging portion 440 located above it. Of course, the connector engaging portion 440 and the shell engaging portion 650 may have different shapes, so that the connector step jaw 450 protrudes outward and the shell step jaw 670 protrudes inward. Although not shown in FIG. 2 and FIG. 3, a locking protrusion (not shown) may be formed on the outer circumferential surface of the shell engaging portion 650. The locking protrusion (not shown) is gently curved and can protrude outward in a convex shape. When the lifting shell assembly is coupled to the container assembly, the locking protrusion (not shown) of the shell engagement portion 650 is inserted into the locking groove (not shown) of the connector step portion 450, enabling a stronger engagement. The locking protrusion (not shown) can be formed at a position corresponding to the locking groove (not shown) and can be formed at a position on a plane that cuts the shell body 610 in half.

[0077] The stopper block 680 may extend downward from the rear lower portion of the shell body 610 to hide the rear side of the shell engaging portion 650 and the holder engaging portion 740. The stopper block 680 may extend along the edge of the lower surface 620 of the shell body 610 and may be formed over the entire rear side of the shell body 610. A stopper surface 690 facing the front side may be formed on the side of the stopper block 680. The stopper surface 690 of the stopper block 680 may have the same inclination as the contact surface 460 of the front block 480, and when the lifting shell assembly is coupled to the container assembly, the stopper surface 690 may abut against the contact surface 460 to form an integrated shape of the stopper block 680 and the front block 480.

[0078] The holder 700 can be arranged to be movable in the vertical direction in the shell space in the lift shell 600, and can be configured to support the stick material 10 on its upper portion. A portion of the holder 700 is exposed through the insertion hole 630 of the lift shell 600, and can be configured to be coupled to the upper end of the shaft 300 when the lift shell assembly is coupled to the container assembly. The holder 700 can include a holder body 720, an outer side wall 730, a holder engagement portion 740, a first alignment protrusion 770, and a second alignment protrusion 780.

[0079] The holder body 720 may correspond to a main portion of the holder 700 and may be disposed within the shell space inside the shell body 610. When the lifting shell assembly is filled with contents, the holder body 720 may be seated on the lower surface 620 of the shell body 610.

[0080] The holder body 720 may be formed with a concave shape at the center thereof. The holder body 720 may be concave in both the front-rear direction and the left-right direction, and may have high structural strength.

[0081] An exterior sidewall 730 extends downwardly from the edge of the holder body 720 to maintain the holder 700 in a stable position within the shell space and to prevent contents or other foreign objects from flowing underneath the holder 700.

[0082] The holder engaging portion 740 is located at a position corresponding to the insertion hole 630, and may be configured to be coupled with the shaft engaging portion 350 of the shaft 300. The holder engaging portion 740 extends downward from the lower surface of the holder body 720, and the holder step jaw 760 provided at the lower portion may protrude laterally. In the example shown in FIG. 2, the holder engaging portion 740 extends downward, and the holder step jaw 760 protrudes outward from the lower portion of the holder engaging portion 740 and hooks onto the shaft step jaw 390 of the shaft engaging portion 350 located above it. Of course, the holder step jaw 760 of the holder engaging portion 740 may be embodied in a form in which it protrudes inward, and the shaft step jaw 390 of the shaft engaging portion 350 protrudes outward.

[0083] The first alignment protrusion 770 and the second alignment protrusion 780 may be formed on the lower surface of the holder body 720 and serve to fix the holder 700 in an aligned position when the holder 700 is at its lowest position within the shell space.

[0084] The first alignment protrusion 770 may protrude downward from a position corresponding to the edge of the insertion hole 630 on the lower surface of the holder body 720. The holder engagement portion 740 may be located inside the first alignment protrusion 770, and the first alignment protrusion 770 may be formed around the holder engagement portion 740. That is, the holder engagement portion 740 may be formed at a position corresponding to the center of the insertion hole 630, and the first alignment protrusion 770 may be formed at a position corresponding to the edge of the insertion hole 630. Therefore, when the holder 700 is at the lowest position in the shell space, the first alignment protrusion 770 may be inserted into the insertion hole 630. Meanwhile, the second alignment protrusion 780 may protrude downward from a position corresponding to the alignment hole 640 on the lower surface of the holder body 720. When the holder 700 is at the lowest position in the shell space, the second alignment protrusion 780 may be inserted into the alignment hole 640.

[0085] The first alignment protrusion 770 and the second alignment protrusion 780 can serve to secure the holder 700 and the stick material 10 thereon in situations such as when the lifting shell assembly is separated into a refill unit form before being coupled to the container assembly.

[0086] The cap assembly of the stick container 2000 covers the exposed portion of the lifting shell assembly and allows the stick material 10 to be stored in an enclosed space. The cap assembly may mainly include an inner cap 910 and an overcap 920.

[0087] The inner cap 910 may be coupled to an upper portion within the overcap 920, and may seal the open upper portion of the shell body 610 when the cap assembly is coupled to the container assembly. A sealing rim 912 extending downward along the edge of the inner cap 910 may be formed at the lower portion of the inner cap 910, and a sealing protrusion 914 protruding outward may be formed at the lower portion of the sealing rim 912. The sealing rim 912 and the sealing protrusion 914 may contact the inner surface of the shell body 610 to hermetically seal the shell space.

[0088] The overcap 920 may be embodied in the form of a cap that is opened downward and configured to surround the container assembly. An engagement groove may be formed on an inner peripheral surface of the overcap 920. When the cap assembly is coupled to the container assembly, a portion of the inner cap 910 may be inserted into the inside of the shell body 610, and a lower end of the overcap 920 may be seated on an upper end of the container body 1100. The engagement protrusion of the connector 400 may be inserted into the engagement groove of the overcap 920, thereby allowing the cap assembly to be detachably fixed to the container assembly.

[0089] When the stick material 10 is used up in the stick container 2000 of one embodiment of the present invention and the lifting shell assembly of the refill unit 1050 is coupled to the container assembly, the user can separate the cap assembly, separate the lifting shell assembly with the depleted contents, and then couple a new lifting shell assembly of the refill unit to the existing container assembly.

[0090] To this end, the user can move the holder 700 to the lowest position so that the shaft engagement portion 350 is positioned below the lower surface 620 of the shell body 610, and then pull the lifting shell 600 and the holder 700 back to separate them.

[0091] The user then moves the lifting shell assembly of the new refill unit forward so that the shell step jaw 670 engages with the connector step jaw 450, the shell engagement portion 650 is coupled to the connector engagement portion 440, the holder step jaw 760 engages with the shaft step jaw 390, and the holder engagement portion 740 is coupled to the shaft engagement portion 350. While the refill unit is moving forward, the locking protrusion (not shown) may be caught in the locking groove (not shown) of the connector step jaw 450. When the user applies a larger force, the locking protrusion (not shown) and the connector step jaw 450 undergo a slight elastic deformation, allowing the locking protrusion (not shown) to pass through and be inserted into the locking groove (not shown) formed in the connector step jaw 450 while passing over the caught portion. When the refill unit reaches its fixed position, the stopper surface 690 of the stopper block 680 can be in close contact with the contact surface 460 of the front block 480.

[0092] As described above, the stick container 2000 and refill unit according to one embodiment of the present invention enable refilling of stick materials 10 having a large lateral length, such as sunscreens and deodorants. The stick container 2000 according to one embodiment of the present invention requires a relatively complex structure, but is composed of parts that are easy to assemble, allowing the product to be assembled with very simple operations and maintaining high bond strength after assembly. As the simple refilling makes it possible to reuse parts of the stick container having a complex structure, it is possible to reduce costs for consumers and manufacturers, significantly reduce resource waste, and reduce environmental pollution.

[0093] Although the above has been described with reference to one embodiment of the present invention, it will be understood by those having ordinary skill in the art that the present invention can be modified and changed in various ways without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

1. a refill unit configured to move forwardly to couple to the container assembly, a lifting shell that extends a predetermined length in the left-right direction and a predetermined length in the up-down direction and defines an upwardly open shell space therein; A holder arranged movably along the up-down direction inside the shell space, The lifting shell is a shell body having the shell space formed therein and an insertion hole formed on a lower surface; a shell engaging portion extending downward from the lower surface of the shell body and having a shell step protruding laterally at a lower portion thereof; The holder includes: a holder body disposed within the shell space; a holder engaging portion extending downward from a lower surface of the holder body at a position corresponding to a center of the insertion hole and having a holder step protruding laterally at a lower portion thereof, When the holder is at the lowest position in the shell space, the holder engagement portion is exposed below the lower surface of the shell main body through the insertion hole, When the refill unit moves forward toward the container assembly with the holder at its lowest position within the shell space, the shell engagement portion engages with the connector of the container assembly and the holder engagement portion engages with the shaft of the container assembly.

2. The refill unit according to claim 1, wherein a first alignment protrusion is formed on the underside of the holder body, the first alignment protrusion being arranged inside the holder engagement portion at a position corresponding to the edge of the insertion hole and extending downward, and the first alignment protrusion is inserted into the insertion hole when the holder is at its lowest position within the shell space.

3. An alignment hole is formed in the lower surface of the shell body, and the shell engagement portion is formed in a shape surrounding the alignment hole, The refill unit of claim 1 , wherein a second alignment protrusion extending downward is formed on the lower surface of the holder body, and when the holder is at its lowest position within the shell space, the second alignment protrusion is inserted into the alignment hole.

4. The lifting shell is 2. The refill unit according to claim 1, further comprising a stopper block extending downward from a lower rear side of said shell body to hide a rear side of said shell engaging portion and having a stopper surface facing forward on a side thereof.

5. 2. The refill unit according to claim 1, wherein the shell step protrudes outward from a lower portion of the shell engaging portion, and at least one of a locking projection and a locking groove is formed on an outer peripheral surface of the shell engaging portion.

6. The shell engaging portion extends downward to form a shell engaging space therein, and the shell step protrudes inward from a lower portion of the shell engaging portion, The refill unit according to claim 1 , wherein the shell engagement portion is configured to be open at a front side and the shell engagement space is open at an upper side and at a front side.

7. The refill unit according to claim 6, wherein at least one of a locking projection and a locking groove is formed on an inner circumferential surface of said shell engaging portion.

8. A refillable stick container configured to have a forward moving refill unit coupled to its top, a connector including a connector engagement portion configured to couple to the lifting shell of the refill unit, the connector having a through hole formed on an upper surface thereof; a screw guide configured to be rotatable relative to the connector and including a socket cylinder, the socket cylinder forming a socket space therein and having a socket screw formed on an inner circumferential surface thereof; a shaft including a shaft engagement portion located over the through hole and an extension body at least partially located within the socket space, the shaft engagement portion being configured to couple to a holder of the refill unit, and a shaft thread formed on a surface of the extension body and configured to mesh with the socket screw; The connector engaging portion extends upward from the upper surface of the connector and includes a connector step jaw protruding laterally at the upper portion, and the shaft engaging portion extends upward from the upper portion of the extension body and includes a shaft step jaw protruding laterally at the upper portion, A refillable stick container, wherein when the refill unit moves forward toward the connector, the connector engagement portion is coupled to the lift shell and the shaft engagement portion is coupled to the holder.

9. a container body coupled to the connector and the screw guide; 9. The refillable stick container of claim 8, wherein the container body is fixed relative to the connector and the screw guide is coupled for rotation relative to the container body.

10. The shaft engaging portion extends upward to form a shaft engaging space therein, and the shaft step protrudes inward from an upper portion of the shaft engaging portion, 9. The refillable stick container of claim 8, wherein the shaft engagement portion is open at a rear side and the shaft engagement space is open at an upper side and a rear side.

11. The connector comprises:

11. The refillable stick container of any one of claims 8 to 10, further comprising a front block extending upwardly from a top of a front side of the connector to conceal a front side of the connector engaging portion and the shaft engaging portion.

12. The front block has a contact surface formed on a side thereof facing the rear side, The refill unit includes a stopper block having a front-facing stopper surface; 12. A refillable stick container as claimed in claim 11, wherein the stopper surface is in intimate contact with the contact surface when the refill unit is coupled.

13. A refillable stick container comprising: a lifting shell that extends a predetermined length in the left-right direction and a predetermined length in the up-down direction and defines an upwardly open shell space therein; A holder arranged to be movable in the vertical direction within the shell space; a connector including a connector engagement portion configured to couple to the lift shell, the connector having a through hole formed on an upper surface thereof; a screw guide configured to be rotatable relative to the connector and including a socket cylinder, the socket cylinder forming a socket space therein and having a socket screw formed on an inner circumferential surface thereof; a shaft including a shaft engaging portion located above the through hole and an extension body at least partially located within the socket space, the shaft engaging portion being configured to couple to the holder, and a shaft screw formed on a surface of the extension body configured to mesh with the socket screw; The lifting shell is a shell body having the shell space formed therein and an insertion hole formed on a lower surface; a shell engaging portion extending downward from the lower surface of the shell body and having a shell step protruding laterally at a lower portion thereof; The holder includes: a holder body disposed within the shell space; a holder engaging portion extending downward from a lower surface of the holder body at a position corresponding to a center of the insertion hole and having a holder step protruding laterally at a lower portion thereof, The connector engaging portion extends upward from the upper surface of the connector and includes a connector step jaw protruding laterally at the upper portion, and the shaft engaging portion extends upward from the upper portion of the extension body and includes a shaft step jaw protruding laterally at the upper portion, When the holder is at the lowest position in the shell space, the holder engagement portion is exposed below the lower surface of the shell main body through the insertion hole, A refillable stick container in which, when the holder is in the lowest position within the shell space and the lifting shell moves forward toward the connector, the shell step jaw engages with the connector step jaw, the shell engagement portion is connected to the connector engagement portion, the holder step jaw engages with the shaft step jaw, and the holder engagement portion is connected to the shaft engagement portion.

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