Refilling unit for sunscreen and refillable rod container provided with same

Abstract

The refill unit according to the present invention comprises: a lifting case having a case space formed therein; and a holder capable of moving inside the case space, the lifting case including: a case body having the case space formed therein and having an insertion hole formed in a lower surface thereof; and a case coupling portion extending downward from the lower surface of the case body and having a case boss on the lower portion, the holder including: a holder body disposed inside the case space; and a retainer coupling part which extends downward from the lower surface of the retainer body at a position corresponding to the center of the insertion hole, and which is provided with a retainer boss protruding in the transverse direction at the lower part. When the holder is located at the lowest position within the housing space, the holder coupling portion is exposed below the lower surface of the housing body through the insertion hole, and when the refill unit is moved forward toward the container assembly in a state in which the holder is located at the lowest position within the housing space, the housing coupling portion is coupled to the connector of the container assembly. The holder coupling portion is coupled to the shaft of the container assembly.

Description

Technical Field

[0001] The present invention relates to a container for sunscreen, in particular to a refilling unit capable of refilling a stick-shaped sunscreen product and a refillable stick-shaped container equipped with the refilling unit. Background Art

[0002] A stick product refers to a product that utilizes a stick material that solidifies a composition containing essential ingredients into a solid form, and a stick container for it is usually provided to store most of the stick material inside the container, and allows the user to operate it as needed to expose only a portion of it to the outside. That is, as the exposed upper part of the stick material is consumed as the stick product is used, the upper part of the stick material is worn, resulting in a gradual decrease in height, and the stick container allows the stick material to move higher and allows the stick material to maintain an exposed state. Recently, in addition to cosmetics such as lipstick or lip balm, multiple-purpose products such as sunscreen, deodorant, glue stick, and ointment medicines are also provided in a stick form.

[0003] Stick-shaped products are usually carried around for use, and therefore are manufactured in a smaller size. The small size of the stick-shaped products limits the available amount of the contents, and requires higher precision in the manufacture of the stick-shaped container. On the other hand, as mentioned above, in order to use the stick material, a complex structure for moving the stick material up and down is required, so a higher manufacturing cost is required compared to a conventional container. If the stick-shaped container is made refillable so that the stick-shaped container with such a high manufacturing cost and complex structure can be reused even after the stick material is exhausted, it will be possible to greatly reduce the waste of resources.

[0004] Among stick products, sunscreen sticks, also known as "sunscreen sticks," are applied to a larger area each time they are used, and for this reason, the stick is made to have a larger width. Therefore, in order to make a stick container for sunscreen, deodorant, etc. refillable, the refill unit needs to be securely fixed over the entire width of the stick. Summary of the invention

[0005] Technical issues

[0006] Therefore, the present invention is proposed to solve the above-mentioned problems. One aspect of the present invention is to provide a refilling unit and a refillable stick-shaped container that can be easily refilled and provide high bonding strength.

[0007] Other objects of the present invention will become more apparent from the embodiments described below.

[0008] Technical Solution

[0009] One aspect of the present invention provides a refilling unit, which is configured to move forward and be coupled to a container assembly. According to one aspect of the present invention, the refilling unit may include: a lifting shell, which extends a predetermined length in the left-right direction and a predetermined length in the up-down direction, and has a shell space open upwardly formed on the inner side; and a retainer, which is configured to be able to move in the up-down direction inside the shell space, the lifting shell may include: a shell body, which has the shell space formed on the inner side and an insertion hole formed on the lower side; and a shell coupling portion, which extends downward from the lower side of the shell body and is provided with a shell boss protruding laterally at the lower part, the retainer may include: a retainer body, which is configured inside the shell space; and a retainer coupling portion, which extends downward from the lower side of the retainer body at a position corresponding to the center of the insertion hole, and is provided with a retainer boss protruding laterally at the lower part. Wherein, when the retainer is located at the lowest position in the shell space, the retainer coupling portion can be exposed below the bottom of the shell body through the insertion hole, and when the refilling unit is moved forward toward the container assembly with the retainer located at the lowest position in the shell space, the shell coupling portion can be coupled to the connector of the container assembly, and the retainer coupling portion can be coupled to the axis of the container assembly.

[0010] The refill unit of the present invention may have one or more of the following embodiments. For example, a first alignment protrusion may be formed on the bottom of the retainer body, which places the retainer coupling portion inside at a position corresponding to the edge of the insertion hole and extends downward, and when the retainer is located at the lowest position in the shell space, the first alignment protrusion may be inserted into the insertion hole.

[0011] An alignment hole may be formed on the bottom of the shell body, the shell coupling portion may be formed in a shape surrounding the alignment hole, a second alignment protrusion extending downward may be formed on the bottom of the retainer body, and when the retainer is located at the lowest position in the shell space, the second alignment protrusion may be inserted into the alignment hole.

[0012] The lifting shell may further include a stopper block extending downward from a lower rear portion of the shell body and shielding a rear side of the shell coupling portion, and having a stopper surface facing forward at a side portion.

[0013] When the shell boss protrudes outward from the lower portion of the shell coupling portion, at least one of a locking protrusion and a locking groove may be formed on the outer peripheral surface of the shell coupling portion.

[0014] When the shell coupling portion extends downward and forms a shell coupling space inside, and the shell boss protrudes inside from the lower part of the shell coupling portion, the shell coupling portion can be configured to be open at the front side so that the shell coupling space is open to the upper part and the front side. In this case, at least one of a locking protrusion and a locking groove can be formed on the inner circumferential surface of the shell coupling portion.

[0015] Another aspect of the present invention provides a refillable stick-shaped container having a structure in which a refilling unit that moves forward is coupled to an upper portion. According to one aspect of the present invention, a refillable rod-shaped container may include: a connector, which has a connector coupling portion configured to be coupled to a lifting shell of the refilling unit and has a through hole formed on the upper surface; a screw guide, which is configured to be able to rotate relative to the connector and has a sleeve, the sleeve forming a sleeve space on the inner side and a sleeve screw formed on the inner circumferential surface; and a shaft, which has a shaft coupling portion located above the through hole and an extension body at least partially located in the sleeve space, the shaft coupling portion is configured to be coupled to a retainer of the refilling unit, and a shaft screw configured to engage with the sleeve screw is formed on the surface of the extension body, the connector coupling portion can extend upward from the upper side of the connection and has a connector boss protruding laterally on the upper part, the shaft coupling portion can extend upward from the upper part of the extension body and has a shaft boss protruding laterally on the upper part, when the refilling unit moves toward the front of the connector, the connector coupling portion is coupled to the lifting shell, and the shaft coupling portion is coupled to the retainer.

[0016] The refillable stick-shaped container of the present invention may have one or more of the following embodiments. For example, the refillable stick-shaped 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 relatively rotatable.

[0017] When the shaft coupling portion extends upward and forms a shaft coupling space inside, and the shaft boss protrudes inward from the upper portion of the shaft coupling portion, the shaft coupling portion may be configured to be open at the rear side so that the shaft coupling space is open to the upper portion and the rear side.

[0018] The connector may further include a front block extending upward from the upper front side of the connector and shielding the front side of the connector coupling portion and the shaft coupling portion. The front block may have a contact surface facing the rear side formed on the side, and the refilling unit may include a stop block having a stop surface facing the front side, and when the refilling unit is coupled, the stop surface may be closely attached to the contact surface.

[0019] Another aspect of the present invention provides a refillable rod-shaped container. According to one aspect of the present invention, the refillable rod-shaped container may include: a lifting shell extending a predetermined length in the left-right direction and a predetermined length in the up-down direction, and having an upwardly open shell space formed inside; a retainer configured to be movable in the up-down direction inside the shell space; a connector having a connector coupling portion configured to be coupled to the lifting shell and having a through hole formed on the upper surface; a screw guide configured to be relatively rotatable relative to the connector and having a sleeve, the sleeve forming a sleeve space inside and having a sleeve screw formed on the inner circumferential surface; and a shaft having a shaft coupling portion located above the through hole and an extension body at least a portion of which is located in the sleeve space, the shaft coupling portion configured to be coupled to the retainer, and having a shaft screw formed on the surface of the extension body configured to engage with the sleeve screw. Wherein, the lifting shell may include: a shell body, which has the shell space formed inside and an insertion hole formed on the bottom; and a shell coupling portion, which extends downward from the bottom of the shell body and is provided with a shell boss protruding in the transverse direction at the bottom. The retainer may include: a retainer body, which is arranged inside the shell space; and a retainer coupling portion, which extends downward from the bottom of the retainer body at a position corresponding to the center of the insertion hole and is provided with a retainer boss protruding in the transverse direction at the bottom. The connector coupling portion may extend upward from the top of the connector and be provided with a connector boss protruding in the transverse direction at the upper part, and the shaft coupling portion may extend upward from the upper part of the extension body and be provided with a shaft boss protruding in the transverse direction at the upper part. When the retainer is located at the lowest position in the shell space, the retainer coupling portion can be exposed below the bottom of the shell body through the insertion hole, and when the lifting shell is moved forward toward the connector with the retainer located at the lowest position in the shell space, the shell boss can engage with the connector boss so that the shell coupling portion is coupled to the connector coupling portion, and the retainer boss can engage with the shaft boss so that the retainer coupling portion is coupled to the shaft coupling portion.

[0020] Effects of the Invention

[0021] According to the technical 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 only when all the following effects are exerted.

[0022] The stick container and the refill unit of one embodiment of the present invention enable refilling of a stick material having a large length in the lateral direction, such as sunscreen or deodorant.

[0023] A stick-shaped container and a refill unit according to an embodiment of the present invention provide a structure that can be easily assembled while maintaining a high bonding strength after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a perspective view exemplarily showing a rod-shaped container according to an embodiment of the present invention.

[0025] Figure 2 1 is a cross-sectional view schematically showing a rod-shaped container according to an embodiment of the present invention.

[0026] Figure 3 1 is a cross-sectional view exemplarily showing a rod-shaped container according to an embodiment of the present invention.

[0027] Figure 4 It is a diagram exemplarily showing a container body of a rod-shaped container according to an embodiment of the present invention.

[0028] Figure 5 It is a perspective view exemplarily showing a screw guide of a rod-shaped container according to an embodiment of the present invention.

[0029] Figure 6 This is a perspective view exemplarily showing a knob of a rod-shaped container according to an embodiment of the present invention.

[0030] Figure 7 The present invention is a perspective view showing a state in which a container body, a screw guide, and a knob are connected in a rod-shaped container according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. When describing with reference to the accompanying drawings, the same or corresponding components will be given the same figure numbers regardless of the figure numbers, and repeated description thereof will be omitted.

[0032] For ease of description, expressions such as "front side", "rear side", "inside", "outside", "upper part", "lower part" and the like are used in this specification. In the following description, the direction in which the lifting shell assembly (i.e., the assembly of the lifting shell 600 and the retainer 700) moves in order to be combined with the container assembly (i.e., the assembly of the shaft 300, the connector 400, the container body 1100, the screw guide 1200 and the knob 1300) will be referred to as the "front". The "front-to-back direction" refers to the direction connecting the front and the rear, the "left-to-right direction" refers to the direction connecting the left and the right, and the "lateral" is a concept including the front-to-back direction and the left-to-right direction. The "inside" is intended to refer to a side close to the interior of the described constituent element or the rod-shaped container 2000, and the "outside" is intended to refer to a side away from the interior of the constituent element or the rod-shaped container 2000.

[0033] On the other hand, "upper" and "lower" are like Figure 2 The configuration of the stick-shaped container 2000 shown is a reference. When the refillable stick-shaped container 2000 of one embodiment of the present invention is actually used, the upper direction, front direction, etc. described in the specification may not be consistent with the actual upper direction, front direction, etc.

[0034] The stick container 2000 of one embodiment of the present invention disclosed below is configured to contain a stick material 10 of sunscreen, deodorant, etc. In this case, the stick material 10 is required to allow each user to quickly apply it to a large area, and therefore, the stick material 10 is generally made to have a greater length in the left-right direction.

[0035] Figure 1 2 is a perspective view exemplarily showing a rod-shaped container 2000 according to an embodiment of the present invention. Figure 2 and Figure 3 The diagrams are cross-sectional views showing the appearance of a stick-shaped container 2000 according to an embodiment of the present invention, taken along the left-right direction and the front-back direction. Figure 4 , Figure 5 and Figure 6 The container body 1100, the screw guide 1200 and the knob 1300 of the rod-shaped container 2000 are shown as examples. Figure 7 The state in which they are combined is shown exemplarily.

[0036] The stick-shaped container 2000 of one embodiment of the present invention corresponds to a stick 10 containing sunscreen, deodorant, etc. and enables the user to use them. The stick 10 is arranged on the upper part of the retainer 700 on the inner side of the lifting shell 600, and can move up and down as the user applies the operation of the rotating knob 1300. The stick-shaped container 2000 of one embodiment of the present invention may include a container assembly, a lifting shell assembly, and a cover assembly. In one embodiment of the present invention, the container assembly refers to a portion including the shaft 300, the connector 400, and the screw guide 1200, the lifting shell assembly refers to a portion including the lifting shell 600 and the retainer 700, and the cover assembly refers to a portion including the inner cover 910 and the top cover 920. The lifting shell assembly can form a refill unit that circulates separately.

[0037] The container assembly of the stick-shaped container 2000 plays a role in supporting the lifting shell assembly and also plays a role in allowing the holder 700 to be lifted and lowered based on the user's operation. In the stick-shaped container 2000 of an 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 knob 1300.

[0038] 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 directions based on a user's operation. In an embodiment of the present invention, the shaft 300 may include an extension 310 , a shaft coupling portion 350 , a shaft screw 360 , and a braking protrusion 370 .

[0039] The extension body 310 is a main part of the shaft 300, and can be extended long in the up-down direction. It is arranged inside the sleeve screw 1260 of the sleeve 1240, and can be configured to pass through the through hole of the connector 400. The extension body 310 can have a non-circular cross-section that does not rotate relative to the connector 400 while moving in the up-down direction. For example, in the example shown in the figure, the cross-section of the extension body 310 of the shaft 300 is formed to be long in one direction, so that the two long sides of the cross-section are flat, and the two short sides are in an arc shape.

[0040] The shaft coupling portion 350 is located above the through hole of the connector 400 and may be configured to be coupled with the retainer coupling portion 740 of the retainer 700. The shaft coupling portion 350 extends upward from the upper portion of the extension body 310, and the shaft boss 390 provided at the upper portion may protrude in the lateral direction. Figure 2 In the example shown, the shaft coupling portion 350 extends upward and forms a shaft coupling space inside, and the retainer coupling portion 740 is inserted into the shaft coupling space. The shaft boss 390 protrudes inward from the upper portion of the shaft coupling portion 350, so that the retainer coupling portion 740 located below it is stopped by the retainer boss 760. Of course, it is also possible that the shaft boss 390 protrudes outward from the shaft coupling portion 350, and the retainer boss 760 protrudes inward from the retainer coupling portion 740.

[0041] The shaft screw 360 may be formed on the entire extension body 310 of the shaft 300, and may protrude outward from both sides of the outer circumference of the extension body 310. That is, the shaft screw 360 may be formed on the short side of the outer circumference of the extension body 310 that is in the shape of an arc. As described above, the shaft screw 360 may be formed only at a predetermined position on the extension body 310, and the sleeve screw 1260 may be formed on the entire inner circumference of the sleeve 1240.

[0042] The shaft 300 may be configured inside the sleeve 1240 of the screw guide 1200 so that the shaft screw 360 is engaged with the sleeve screw 1260. When the knob 1300 is rotated by the user's operation, the sleeve screw 1260 rotates, but the shaft 300 cannot rotate together due to the extension body 310 configured to be non-rotatable. As the sleeve screw 1260 rotates, the shaft screw 360 engaged therewith moves along the sleeve screw 1260, and since the shaft 300 cannot rotate, the shaft screw 360 and the shaft 300 including it move in the up and down directions without rotating.

[0043] The stopper protrusion 370 may protrude toward the outside from another position where the shaft screw 360 is not formed at the lower portion of the extension body 310. For example, the stopper protrusion 370 may be formed on a long side of a flat surface forming the lower portion of the extension body 310.

[0044] The connector 400 corresponds to the part 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 refilling unit by itself, and when the contents of a rod-shaped container 2000 are exhausted, the lifting shell assembly with exhausted contents can be replaced by the lifting shell assembly of a new refilling unit. Therefore, the connector 400 can be configured to detachably combine the lifting shell assembly with the container assembly. In one embodiment of the present invention, the rod 10 and the lifting shell 600 accommodating it can have a large length in the left-right direction, and accordingly, the connector 400 can also have a large length in the left-right direction. The connector 400 can generally include a connector base 410, a support cylinder 420, a connector coupling portion 440, an inner coupling portion 470, and a front block 480.

[0045] The connector base 410 may form the upper surface of the connector 400, and a through hole through which the shaft 300 can pass may be formed in the connector base 410. The through hole may be formed inside the inner coupling portion 470. For example, Figure 2 In the example shown, inner coupling parts 470 are formed on the left and right sides of the through hole of the connector base 410, and clearance holes 475 are formed on the left and right sides of the inner coupling parts 470. The through hole can be configured to have a shape and size corresponding to the cross section of the extension body 310 so that the extension body 310 can pass through. Figure 2 In the illustrated example, the through hole is formed to have a size that prevents the connector coupling portion 440 from passing therethrough.

[0046] The support cylinder 420 may have a hollow shape with an open lower portion, and its lower portion may be inserted into the inner side of the container body 1100. The support cylinder 420 does not need to be in direct contact with the rotating component, and thus may have a non-circular cross section. A coupling protrusion 423 for coupling with the container body 1100 may be formed on the outer surface of the support cylinder 420.

[0047] The connector coupling portion 440 may be located at the upper portion of the connector 400 and configured to be coupled to the housing coupling portion 650 of the lifting housing 600. In this embodiment, in order to accommodate the rod 10 having a large length in the left-right direction, the lifting housing 600 and the connector 400 also have a large length in the left-right direction. Accordingly, the connector 400 may have a plurality of connector coupling portions 440. Figure 2In the example shown, a connector coupling portion 440 may be provided on each side of the through hole through which the shaft coupling portion 350 passes. In some embodiments, one of the connector coupling portions 440 may be formed to surround the through hole.

[0048] The connector coupling portion 440 extends upward from the connector base 410, and the connector boss 450 disposed on the upper portion may protrude in the lateral direction. Figure 2 In the example shown, the connector coupling portion 440 extends upward and forms a connector coupling space inside, and the shell coupling portion 650 is inserted into the connector coupling space. The connector boss 450 protrudes inward from the upper portion of the connector coupling portion 440 and is locked to the shell boss 670 of the shell coupling portion 650 located below it. Of course, the shapes of the connector coupling portion 440 and the shell coupling portion 650 can also be different, with the connector boss 450 protruding outward and the shell boss 670 protruding inward.

[0049] Although Figure 2 and Figure 3 Although not shown in the figure, a retaining groove (not shown) may be formed on the connector boss 450. The retaining groove (not shown) may be formed as a gently curved depression. When the lifting shell assembly is coupled to the container assembly, the retaining protrusion (not shown) of the shell coupling portion 650 described later is inserted into the retaining groove (not shown) of the connector boss 450, thereby achieving a more secure coupling.

[0050] The inner coupling portion 470 may be formed at the lower portion of the connector base 410 and serves to couple the connector 400 to the container body 1100 on one hand and to fix the shaft 300 on the other hand. The inner coupling portion 470 may be formed at a position corresponding to the shaft 300 and may have a through hole formed inside thereof. Figure 2 In the illustrated example, clearance holes 475 are formed on both left and right sides of the inner joint portion 470 .

[0051] The inner coupling portion 470 may have a coupling protrusion 471 formed on its outer surface based on the left-right direction, and may have a placement boss 473 formed on its inner surface. The coupling protrusion 471 may engage with the coupling protrusion 1162 of the container body 1100 to help firmly combine the connector 400 and the container body 1100, and the placement boss 473 may support the shaft coupling portion 350 when the shaft 300 is fully lowered.

[0052] The front block 480 may extend upward from the upper front side of the connector 400 and shield the front side of the connector coupling portion 440 and the shaft coupling portion 350. The front block 480 may extend along the edge of the connector base 410 and may be formed on the entire front side of the connector 400.

[0053] The side of the front block 480 may be formed with a contact surface (not shown) facing the rear side in a shape in which the rear side thereof is cut along a plane. The contact surface 460 may be formed relatively inclined relative to the up-down direction, and may be configured to contact a stop surface (not shown) of a stop block 680 formed on the lifting housing 600. In this embodiment, the connector 400 may include a plurality of connector coupling portions 440, and the contact surface (not shown) may be formed on the front block 480 formed on the entire connector 400.

[0054] In a rod-shaped container 2000 according to an embodiment of the present invention, the container body 1100 may be combined with the connector 400 and the screw guide 1200. In an embodiment of the present invention, the rod 10 has a large width, so a structure including a separately rotating portion may be more convenient to use than rotating the container body itself. In this embodiment, the container body 1100 itself does not rotate, but exposes a knob 1300 configured to be rotated by a user. Figure 4 The container body 1100 of this embodiment may include a bottom 1110 , an outer wall 1120 , an inner wall 1130 , a fixing tube 1140 , an enlarged diameter portion 1150 , and a coupling portion 1160 .

[0055] The bottom 1110 may form the bottom of the entire container body 1100 and the stick-shaped container 2000, and the outer sidewall 1120 may extend upward from the edge of the bottom 1110. The bottom 1110 and the outer sidewall 1120 may form a part of the appearance of the container body 1100 and the stick-shaped container 2000. A coupling protrusion 1122 may be formed on the inner side surface of the outer sidewall 1120. The coupling protrusion 1122 may be engaged with a coupling protrusion 423 formed on the support cylinder 420 of the connector 400.

[0056] In one embodiment of the present invention, an exposure groove 1125 may be formed at the lower portion of the container body 1100. The exposure groove 1125 may be open to the front side, the rear side, or both sides of the container body 1100, for example, and the outer side wall 1120 may have a shape corresponding thereto. In some embodiments, the exposure groove 1125 may be omitted, and the knob 1300 may be exposed below the bottom 1110.

[0057] When the exposure groove 1125 is formed in the container body 1100, the container body 1100 may include an inner sidewall 1130 defining the exposure groove 1125. Figure 4 As shown, the inner side wall 1130 and the platform 1132 formed on the upper portion thereof may form an exposed groove 1125 where the knob 1300 is located.

[0058] The fixing cylinder 1140 is a part that fixes the screw guide 1200 inside. The fixing cylinder 1140 may extend upward from the bottom 1110 or the upper side of the platform 1132, and may have a hollow shape that is open at the upper and lower parts. Figure 4 As shown, the fixing cylinder 1140 may be formed in a cylindrical shape except for a portion corresponding to the position of the enlarged diameter portion 1150, or may be formed in a complete cylindrical shape also in a cylindrical shape at a position corresponding to the enlarged diameter portion 1150. An installation space 1145 for inserting the screw guide 1200 may be formed inside the fixing cylinder 1140. The fixing cylinder 1140 may be designed so that the height of its upper end corresponds to the lower side of the fixing protrusion 1242 of the screw guide 1200.

[0059] The enlarged diameter portion 1150 may be formed in an arc shape having a larger diameter than the fixed cylinder on both sides of the fixed cylinder 1140, and the coupling portion 1160 may further extend upward from the enlarged diameter portion 1150. At the upper portion of the coupling portion 1160, a coupling protrusion 1162 may protrude outward, which may be utilized for coupling the container body 1100 and the connector 400.

[0060] The screw guide 1200 corresponds to a portion that is rotated by a user's operation and causes the shaft 300 to rise and fall. Figure 5 The screw guide 1200 of this embodiment may include a guide base 1210 , a sleeve 1240 , a sleeve screw 1260 , an outer ring 1280 and an inner ring 1290 .

[0061] The guide base 1210 may have a ring shape, and may support the rest of the screw guide 1200 .

[0062] The sleeve 1240 may extend upward from the guide base 1210. The sleeve 1240 may have a hollow cylindrical shape, and may have a sleeve space 1205 formed therein into which the extension body 310 of the shaft 300 can be inserted. The outer diameter of the sleeve 1240 may correspond to the inner diameter of the fixing cylinder 1140. The sleeve screw 1260 may be disposed at the inner side of the sleeve 1240 and facing the sleeve space 1205.

[0063] At the upper portion of the sleeve 1240, a fixing protrusion 1242 may protrude outward, and a clearance slit 1245 may be formed at the upper portion of the sleeve 1240. The clearance slit 1245 may lead from a predetermined position on the sleeve 1240 to the upper end of the sleeve 1240.

[0064] The sleeve screw 1260 may be formed on the inner side of the sleeve 1240. The sleeve screw 1260 may protrude inward from the inner side of the sleeve 1240 and be formed in a spiral shape to form an internal thread. The sleeve screw 1260 may be configured to engage with the shaft screw 360 of the shaft 300. As shown in the example shown in the figure, the shaft screw 360 may be formed on the entire extension body 310 of the shaft 300, and the sleeve screw 260 may be formed only at a predetermined position. On the contrary, the shaft screw 360 may be formed only at a predetermined position on the extension body 310, and the sleeve screw 1260 may be formed on the entire inner circumference of the sleeve 1240.

[0065] The outer ring 1280 and the inner ring 1290 may protrude downward from the lower portion of the guide base 1210. 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 inner side of the outer ring 1280 at a certain interval from the outer ring 1280. The outer ring 1280 and the inner ring 1290 may be used to combine the knob 1300 with the screw guide 1200. For example, Figure 2 and Figure 3 As shown, the inner ring 1380 of the knob 1300 can be pressed into the gap between the outer ring 1280 and the inner ring 1290.

[0066] One or more fixing grooves 1285 may be formed on the outer ring 1280. When the knob 1300 is coupled to the screw guide 1200, the fixing protrusion 1322 formed on the knob 1300 may be inserted into the fixing groove 1285, and the fixing protrusion 1322 may transmit the rotation force applied to the knob 1300 to the screw guide 1200.

[0067] The knob 1300 is a part coupled to the screw guide 1200 and is rotated by the user by holding it. Figure 6 The knob 1300 may include a base 1310 , a side wall 1320 , and an inner ring 1380 .

[0068] The base 1310 may form the lower portion of the knob 1300 and may have a circular flat plate shape 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 knob 1300 corresponds to a portion that a user directly contacts when operating the stick-shaped container 2000. In order to enable the user to rotate the knob 1300 more smoothly, the side wall 1320 may be formed with concave and convex portions. Figure 1 As shown, the side wall 1320 of the knob 1300 may be exposed to the front and rear sides of the stick-shaped container 2000 through the exposure groove 1125 of the container body 1100 .

[0069] One or more fixing protrusions 1322 may be provided on the inner circumference of the side wall 1320, and the fixing protrusions 1322 may protrude inward. As described above, when the knob 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 knob 1300, the fixing protrusions 1322 may transmit the rotational force to the screw guide 1200.

[0070] In the example shown in the drawings, in order to improve the convenience of manufacturing and the aesthetic appearance, the structure in which the knob 1300 is combined with the screw guide 1200 is shown, but the knob 1300 may also be configured as a part of the screw guide 1200. That is, the rod-shaped container 2000 does not necessarily have a separate knob 1300, and a part of the screw guide 1200 may be exposed to the outside of the container body 1100 to play the role of the knob 1300.

[0071] Figure 7 1 is a perspective view exemplarily showing a state in which a container body 1100, a screw guide 1200, and a knob 1300 are combined in a stick-shaped container 2000 according to an embodiment of the present invention. Figure 7 The structure shown is further combined with the shaft 300 and the connector 400 to form a container assembly.

[0072] In order to assemble the container assembly, the manufacturer can first separately manufacture the shaft 300, the connector 400, the container body 1100, the screw guide 1200, and the knob 1300. Although these components have somewhat complicated shapes, since all parts of each component are accessible from above and below, they can be manufactured without difficulty by, for example, a molding process using upper and lower molds.

[0073] The knob 1300 may be coupled to the lower portion of the screw guide 1200. In a state where the fixing protrusion 1322 of the knob 1300 is aligned with the fixing groove 1285 of the screw guide 1200, the manufacturer may press the screw guide 1200 and the knob 1300 toward each other, and after the inner ring 1380 of the knob 1300 is pressed between the outer ring 1280 and the inner ring 1290, the screw guide 1200 and the knob 1300 may be coupled when the coupling protrusion formed on the outer circumferential surface of the guide base 1210 is inserted into the coupling groove formed on the side wall 1320 of the knob 1300.

[0074] The connector 400 may be coupled to the upper portion of the container body 1100. The manufacturer may press the container body 1100 and the connector 400 toward each other in such a manner that the support cylinder 420 of the connector 400 is inserted into the open upper portion of the container body 1100, and when the coupling protrusion 423 of the support cylinder 420 is engaged with the coupling protrusion 1122 of the outer side wall 1120, and the coupling protrusion 471 of the inner side coupling portion 470 is engaged with the coupling protrusion 1162 of the coupling portion 1160, the container body 1100 and the connector 400 may be securely coupled.

[0075] In particular, when the coupling protrusion 1162 of the coupling part 1160 meets the coupling protrusion 471 of the inner coupling part 470 when the connector 400 moves upward, the coupling part 1160 can be opened outward by elastic deformation, and the inner coupling part 470 can be retracted inward by elastic deformation. In such a process, the upper inclined surface of the coupling protrusion 1162 rises along the lower inclined surface of the coupling protrusion 471, and when the coupling protrusion 1162 passes over the coupling protrusion 471, the lower surface of the coupling protrusion 1162 is stuck to the upper surface of the coupling protrusion 471.

[0076] The screw guide 1200 may be coupled to the lower portion of the container body 1100. The manufacturer may move the sleeve 1240 upward at the exposed groove 1125 of the screw guide 1200 and insert it into the installation space 1145. The outer diameter of the sleeve 1240 corresponds to the inner diameter of the fixed cylinder 1140, but a fixing protrusion 1242 protruding outward is formed on the outer circumferential surface of the upper portion of the sleeve 1240. However, since the clearance slit 1245 is formed on the sleeve 1240, the sleeve 1240 may be inserted into the inner side of the fixed cylinder 1140.

[0077] When the manufacturer inserts the sleeve 1240 into the inner side of the fixed cylinder 1140, the sleeve 1240 undergoes elastic deformation, and the clearance slit 1245 retracts to have a narrower width and can enter the installation space 1145. When the screw guide 1200 moves to the end, the fixing protrusion 1242 of the sleeve 1240 reaches the upper end of the fixed cylinder 1140, so that the sleeve 1240 elastically returns to the original state, and the lower side of the fixing protrusion 1242 is stuck to the upper end of the fixed cylinder 1140. In this state, the upper end of the knob 1300 is located below the platform 1132.

[0078] On the other hand, when the screw guide 1200 is completely coupled to the container body 1100, the upper end of the sleeve 1240 supports the inner coupling portion 470 on the inner side, so that the inner coupling portion 470 is no longer easily deformed inward. Therefore, after the screw guide 1200 is coupled to the container body 1100, the connector 400 coupled to the container body 1100 cannot be easily separated.

[0079] In the state where the connector 400, the container body 1100, the screw guide 1200, and the knob 1300 are thus coupled to each other, the manufacturer can couple the shaft 300 to the screw guide 1200. This can be achieved by inserting the extension body 310 of the shaft 300 into the sleeve space 1205 of the sleeve 1240 through the through hole. The manufacturer can rotate the shaft 300 after engaging the shaft screw 360 of the shaft 300 with the sleeve screw 1260 of the sleeve 1240. Since the shaft 300 cannot rotate relative to the connector 400 and the container body 1100, the shaft 300 can gradually descend when the screw guide 1200 and the knob 1300 rotate.

[0080] The lifting shell assembly of the stick-shaped container 2000 accommodates the contents of sunscreen, deodorant, etc. in the form of a stick 10, and the stick 10 can be raised or lowered by the user to adjust the degree of exposure of the stick. In one embodiment of the present invention, the lifting shell assembly can constitute a refilling unit, and when the contents in a stick-shaped container 2000 are used up, the lifting shell assembly with exhausted contents can be replaced by a separate refilling unit. Therefore, the lifting shell assembly can be constituted to be detachably coupled to the connector 400 of the container assembly. The lifting shell assembly can generally include a lifting shell 600 and a retainer 700.

[0081] The lifting shell 600 can extend a predetermined length in the left-right direction and also extend a predetermined length in the up-down direction, and is hollow, so that a shell space can be defined inside it. The shell space can accommodate the retainer 700 and the contents in the form of the rod 10 coupled thereto. When using the rod-shaped container 2000 of an embodiment of the present invention, the user can hold the lifting shell 600 and / or the container body 1100 with one hand, and hold the knob 1300 with the other hand to implement the operation of rotating them relative to each other. The lifting shell 600 may include a shell body 610, a shell coupling portion 650, and a stop block 680.

[0082] The housing body 610 is a main part of the lifting housing 600 and may have a hollow column shape. The housing body 610 may have a shape that extends a predetermined length in the left-right direction and the up-down direction and accommodates and surrounds the holder 700 and the rod 10 accommodated in the housing space inside thereof. The upper portion of the housing body 610 may be open, and a lower surface 620 defining the lower portion of the housing space may be formed at the lower portion, and an insertion hole 630 and an alignment hole 640 may be formed on the lower surface 620 of the housing body 610.

[0083] The retainer coupling portion 740 of the retainer 700 can be inserted into the insertion hole 630 formed on the lower surface 620 of the shell body 610. That is, the insertion hole 630 can provide a passage in a manner that enables the retainer coupling portion 740 to be coupled with the shaft coupling portion 350. On the other hand, the first alignment protrusion 770 provided on the retainer 700 can also be inserted into the insertion hole 630. That is, when the retainer 700 is located at the lowest position in the shell space, the first alignment protrusion 770 can be inserted into the insertion hole 630.

[0084] The 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 case body 610. That is, when the holder 700 is located at the lowest position in the case space, the second alignment protrusion 780 can be inserted into the alignment hole 640.

[0085] The shell coupling part 650 may be provided at the lower side 620 of the shell body 610 and configured to be coupled with the connector coupling part 440 of the connector 400. In this embodiment, in order to accommodate the rod 10 having a large length in the left-right direction, the lifting shell 600 and the connector 400 also have a large length in the left-right direction, and accordingly the lifting shell 600 may have a plurality of shell coupling parts 650. Figure 2 As shown in the illustrated example, a shell coupling portion 650 may be provided on both sides of the insertion hole 630 through which the retainer coupling portion 740 passes. In some embodiments, one of the shell coupling portions 650 may be formed to surround the insertion hole 630.

[0086] The shell coupling portion 650 may extend downward from the lower surface 620 of the shell body 610, and the shell boss 670 provided at the lower portion may protrude in the lateral direction. Figure 2 In the example shown, the shell coupling portion 650 is formed to extend downward and surround the area including the alignment hole 640. The shell boss 670 protrudes outward from the lower portion of the shell coupling portion 650 and is locked to the connector boss 450 of the connector coupling portion 440 located above it. Of course, the shapes of the connector coupling portion 440 and the shell coupling portion 650 can be different, the connector boss 450 protrudes outward, and the shell boss 670 protrudes inward. Although in Figure 2 and Figure 3 Although not shown in the figure, a locking protrusion (not shown) may be formed on the outer peripheral surface of the shell coupling portion 650. The locking protrusion (not shown) may be gently curved and protrude convexly outward. When the lifting shell assembly is coupled to the container assembly, the locking protrusion (not shown) of the shell coupling portion 650 is inserted into the locking groove (not shown) of the connector boss 450, thereby achieving a more secure coupling. The locking protrusion (not shown) may be formed at a position corresponding to the locking groove (not shown), and may be formed at a position on the surface that cuts the shell body 610 in half.

[0087] The stopper block 680 may extend downward from the lower rear portion of the shell body 610 and shield the rear side of the shell coupling portion 650 and the retainer coupling 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 on 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 a shape in which the stopper block 680 is integrated with the front block 480.

[0088] The holder 700 may be configured to be movable in the up-down direction in the shell space inside the lifting shell 600, and may be configured to support the bar 10 at its upper portion. The holder 700 may be configured to expose a portion thereof through the insertion hole 630 of the lifting shell 600, and to be coupled to the upper end of the shaft 300 when the lifting shell assembly is coupled to the container assembly. The holder 700 may include a holder body 720, an outer side wall 730, a holder coupling portion 740, a first alignment protrusion 770, and a second alignment protrusion 780.

[0089] The holder body 720 may correspond to a main portion of the holder 700 and may be disposed in a case space inside the case body 610. The holder body 720 may be mounted on the lower face 620 of the case body 610 when the lifting case assembly is filled with contents.

[0090] The holder body 720 may be formed in a shape that is concave in the middle. Since the holder body 720 is concave in the front-rear direction and also concave in the left-right direction, the holder body 720 may have a high structural strength.

[0091] The outer side wall 730 extends downward from the edge of the holder body 720 so that the holder 700 maintains a stable configuration within the shell space and can prevent contents or other foreign matter from flowing into the bottom of the holder 700 .

[0092] The retainer coupling portion 740 is located at a position corresponding to the insertion hole 630 and may be configured to be coupled to the shaft coupling portion 350 of the shaft 300. The retainer coupling portion 740 extends downward from the bottom of the retainer body 720, and the retainer boss 760 provided at the bottom may protrude in the lateral direction. Figure 2 In the example shown, the retainer coupling portion 740 extends downward, and the retainer boss 760 protrudes outward from the lower portion of the retainer coupling portion 740 and is locked to the shaft boss 390 of the shaft coupling portion 350 located above it. Of course, it is also possible to implement a form in which the retainer boss 760 of the retainer coupling portion 740 protrudes inward and the shaft boss 390 of the shaft coupling portion 350 protrudes outward.

[0093] The first and second alignment protrusions 770 and 780 may be formed on the lower side of the holder body 720 and function to fix the holder 700 in an aligned position when the holder 700 is located at the lowest position within the housing space.

[0094] The first alignment protrusion 770 may protrude downward from a position corresponding to the edge of the insertion hole 630 in the lower surface of the retainer body 720. The retainer coupling portion 740 may be located at the inner side of the first alignment protrusion 770, and the first alignment protrusion 770 is formed around the retainer coupling portion 740. That is, the retainer coupling 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 retainer 700 is located at the lowest position in the shell space, the first alignment protrusion 770 may be inserted into the insertion hole 630. On the other hand, the second alignment protrusion 780 may protrude downward from a position corresponding to the alignment hole 640 in the lower surface of the retainer body 720. When the retainer 700 is located at the lowest position in the shell space, the second alignment protrusion 780 may be inserted into the alignment hole 640.

[0095] The first alignment protrusion 770 and the second alignment protrusion 780 play a role in fixing the holder 700 and the rod 10 thereon before the lifting shell assembly is combined with the container assembly, when it is separated into the form of a refill unit, etc.

[0096] The cover assembly of the rod-shaped container 2000 covers the exposed part of the lifting shell assembly so that the rod 10 can be kept in a closed space. The cover assembly may include an inner cover 910 and a top cover 920.

[0097] The inner cover 910 may be combined with the upper portion inside the top cover 920, and may seal the open upper portion of the shell body 610 when the cover assembly is combined with the container assembly. A sealing edge 912 extending downward along the edge of the inner cover 910 may be formed at the lower portion of the inner cover 910, and a sealing protrusion 914 protruding toward the outside may be formed at the lower portion of the sealing edge 912. The sealing edge 912 and the sealing protrusion 914 may contact the inner side surface of the shell body 610 to hermetically seal the shell space.

[0098] The top cover 920 may be implemented in the form of a cover open to the bottom, and is configured to surround the container assembly. A coupling groove may be formed on the inner circumferential surface of the top cover 920. When the cover assembly is coupled to the container assembly, a portion of the inner cover 910 may be inserted into the inner side of the shell body 610, the lower end of the top cover 920 may be mounted on the upper end of the container body 1100, and when the coupling protrusion of the connector 400 is inserted into the coupling groove of the top cover 920, the cover assembly may be detachably fixed to the container assembly.

[0099] In the rod-shaped container 2000 of one embodiment of the present invention, when the rod material 10 is exhausted and the lifting shell assembly of the refilling unit 1050 is combined with the container assembly, the user can combine the new lifting shell assembly of the refilling unit with the existing container assembly after separating the cover assembly and separating the lifting shell assembly with exhausted contents.

[0100] To this end, the user may move the retainer 700 to the lowest position so that the shaft coupling portion 350 is located below the lower surface 620 of the housing body 610 , and then pull the lifting housing 600 and the retainer 700 backward to separate them.

[0101] Then, the user can move the lifting shell assembly of the new refill unit forward so that the shell boss 670 is engaged with the connector boss 450, so that the shell coupling portion 650 is coupled to the connector coupling portion 440, and the retainer boss 760 is engaged with the shaft boss 390, so that the retainer coupling portion 740 is coupled to the shaft coupling portion 350. In the process of the refill unit moving forward, the locking protrusion (not shown) can be locked in the locking groove (not shown) of the connector boss 450. When the user applies a greater force, the locking protrusion (not shown) and the connector boss 450 are slightly elastically deformed, so that the locking protrusion (not shown) can pass through and can be inserted into the locking groove (not shown) formed in the connector boss 450 when entering the locked portion. When the refill unit reaches the correct position, the stop surface 690 of the stop block 680 can be tightly attached to the contact surface 460 of the front block 480.

[0102] As indicated above, the stick container 2000 and the refill unit of one embodiment of the present invention make it possible to refill the stick material 10 having a large length in the lateral direction, such as sunscreen or deodorant. The stick container 2000 of one embodiment of the present invention requires a relatively complex structure, but is composed of easily assembled parts, so the product can be assembled by very simple actions, and a high bonding strength can be maintained after assembly.

[0103] Easy refilling makes it possible to reuse the complex structured parts of the stick-shaped container, thereby reducing costs for consumers and manufacturers, significantly reducing waste of resources, and also reducing environmental pollution.

[0104] Although the present invention is described above with reference to an embodiment, those skilled in the art will appreciate that the present invention may be variously modified and altered without departing from the scope of the invention as described in the claims.

Claims

1. A refilling unit, which is configured to move forward and be coupled to a container assembly, the refilling unit being characterized in that it comprises: a lifting shell extending in the left-right direction by a predetermined length, extending in the up-down direction by a predetermined length, and forming a shell space opened upward inside; as well as a retainer configured to be movable in an up-down direction inside the shell space, The lifting shell comprises: a case body having the case space formed inside and an insertion hole formed on a lower surface; and The shell joint part extends downward from the bottom of the shell body and is provided with a shell boss protruding laterally at the bottom. The retainer comprises: a retainer body disposed inside the shell space; and a retainer coupling portion, which extends downward from the bottom of the retainer body at a position corresponding to the center of the insertion hole and is provided with a retainer boss protruding in the lateral direction at the bottom, When the retainer is located at the lowest position in the shell space, the retainer coupling portion is exposed below the lower surface of the shell body through the insertion hole. When the refill unit is moved forward toward the container assembly in a state where the holder is located at the lowest position in the case space, the case coupling portion is coupled to the connector of the container assembly, and the holder coupling portion is coupled to the shaft of the container assembly.

2. The refill unit according to claim 1, characterized in that A first alignment protrusion is formed on the bottom of the retainer body, which places the retainer coupling part inside at a position corresponding to the edge of the insertion hole and extends downward, and when the retainer is located at the lowest position in the shell space, the first alignment protrusion is inserted into the insertion hole.

3. The refill unit according to claim 1, characterized in that An alignment hole is formed on the bottom surface of the shell body, and the shell coupling portion is formed in a shape surrounding the alignment hole. A second alignment protrusion extending downward is formed on a lower surface of the holder body, and when the holder is located at a lowest position in the housing space, the second alignment protrusion is inserted into the alignment hole.

4. The refill unit according to claim 1, characterized in that The lifting shell further includes a stopper, which extends downward from a lower rear portion of the shell body and blocks a rear side of the shell coupling portion, and has a stopper surface facing forward on a side portion.

5. The refill unit according to claim 1, characterized in that The shell boss protrudes outward from a lower portion of the shell coupling portion, and at least one of a locking protrusion and a locking groove is formed on an outer peripheral surface of the shell coupling portion.

6. The refill unit according to claim 1, characterized in that The shell combination portion extends downward and forms a shell combination space inside, and the shell boss protrudes inward from the lower part of the shell combination portion. The shell coupling portion is configured to be open at the front side, so that the shell coupling space is open to the upper part and the front side.

7. The refill unit according to claim 6, characterized in that At least one of a locking protrusion and a locking groove is formed on the inner peripheral surface of the shell coupling portion.

8. A refillable stick-shaped container, which is configured to be combined with a refilling unit that moves forward at the top, the refillable stick-shaped container being characterized by comprising: a connector having a connector coupling portion configured to be coupled to the lifting and lowering housing of the refilling unit and having a through hole formed on an upper surface thereof; a screw guide configured to be relatively rotatable with respect to the connector and comprising a sleeve having a sleeve space formed inside and a sleeve screw formed on an inner peripheral surface; and A shaft having a shaft coupling portion located above the through hole and an extension body at least partially located in the sleeve space, wherein the shaft coupling portion is configured to be coupled to a retainer of the refill unit, and a shaft screw configured to engage with the sleeve screw is formed on the surface of the extension body, The connector coupling portion extends upward from the top of the connector and is provided with a connector boss protruding laterally on the upper portion; the shaft coupling portion extends upward from the upper portion of the extension body and is provided with a shaft boss protruding laterally on the upper portion; When the refill unit moves toward the front of the connector, the connector coupling portion is coupled to the lifting case, and the shaft coupling portion is coupled to the holder.

9. The refillable stick-shaped container according to claim 8, characterized in that Also includes a container body combined with the connector and the screw guide, The container body is fixed relative to the connector, and the screw guide is coupled to the container body so as to be relatively rotatable.

10. The refillable stick-shaped container according to claim 8, characterized in that The shaft coupling portion extends upward and forms a shaft coupling space inside, and the shaft boss protrudes inward from the upper part of the shaft coupling portion. The shaft coupling portion is configured to be open at the rear side, so that the shaft coupling space is open to the upper part and the rear side.

11. The refillable stick-shaped container according to claim 8, characterized in that The connector further comprises a front block, which extends upward from an upper portion of a front side of the connector and shields the front sides of the connector coupling portion and the shaft coupling portion.

12. The refillable stick-shaped container according to claim 11, characterized in that The front block is formed with a contact surface facing the rear side at the side. The refill unit comprises a stop block having a stop surface facing the front side, When the refill unit is coupled, the stop surface abuts against the contact surface.

13. A refillable stick container, characterized in that: include: a lifting shell extending in the left-right direction by a predetermined length, extending in the up-down direction by a predetermined length, and forming a shell space opened upward inside; a retainer configured to be movable in an up-down direction inside the shell space; A connector having a connector coupling portion configured to be coupled to the lifting housing and having a through hole formed on an upper surface thereof; a screw guide configured to be relatively rotatable with respect to the connector and comprising a sleeve having a sleeve space formed inside and a sleeve screw formed on an inner peripheral surface; and A shaft having a shaft coupling portion located above the through hole and an extension body at least partly located in the sleeve space, wherein the shaft coupling portion is configured to be coupled to the retainer, and a shaft screw configured to mesh with the sleeve screw is formed on the surface of the extension body, The lifting shell comprises: a case body having the case space formed inside and an insertion hole formed on a lower surface; and The shell joint part extends downward from the bottom of the shell body and is provided with a shell boss protruding laterally at the bottom. The retainer comprises: a retainer body disposed inside the shell space; and a retainer coupling portion, which extends downward from the bottom of the retainer body at a position corresponding to the center of the insertion hole and is provided with a retainer boss protruding in the lateral direction at the bottom, The connector coupling portion extends upward from the top of the connector and is provided with a connector boss protruding laterally on the upper portion; the shaft coupling portion extends upward from the upper portion of the extension body and is provided with a shaft boss protruding laterally on the upper portion; When the retainer is located at the lowest position in the shell space, the retainer coupling portion is exposed below the lower surface of the shell body through the insertion hole. When the lifting shell is moved forward toward the connector with the retainer at the lowest position in the shell space, the shell boss engages with the connector boss so that the shell coupling part is coupled to the connector coupling part, and the retainer boss engages with the shaft boss so that the retainer coupling part is coupled to the shaft coupling part.

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