Patent Description:
Packaging tube is a carrier of cosmetics such as lipstick, and center tube core is its core component, which generally includes a prong, a bead and a spiral. In order to make the appearance of the product beautiful, the spiral of some product is surrounded by a middle bundle of metal material, or the prong of some products is made of metal material, while most of other components are made by injection molding of polymer materials due to the restrictions of the process. With the demanding of environmental protection, people hope that plastics and other materials can be recycled and reused. As mentioned above, most of the existing packaging tubes are made of metal and plastic, which are always difficult to recycle and reuse. US patent Publication No. <CIT> discloses an article dispenser and more particularly to a casing intended for holding and dispensing cosmetic sticks, particularly lipsticks, and having a twisting mechanism in which a holder for the cosmetic element is guided in a longitudinally slotted tube affixed to a base and engages in the threaded track of a sleeve which is rotatable with respect to the slotted tube, the engagement being effected by means of guide pins which extend through the corresponding slots in the tube.

The present application provides a center tube core made of all metal material, which solves the problem that the traditional center tube core is difficult to be recycled and reused.

The center tube core comprises a prong, a spiral rotatably surrounding the prong and a bead slidably provided in the prong for supporting product, wherein a side wall of the prong is provided with a slide slot extending in an axial direction, an outer wall of the bead is provided with a slide block extending out of the slide slot in a radial direction, and an inner wall of the spiral is provided with a feed thread acting on the slide block, and wherein the prong, the bead and the spiral are all made of metal material; wherein the bead includes an inner cylinder and an outer cylinder surrounded one around the other, and wherein an outer wall of the outer cylinder is provided with the slide block, and wherein the bead is formed by assembling the outer cylinder and the inner cylinder by interference fit, the outer cylinder is machined at the side wall thereof to form the slide block that protrudes radially outwardly, and the inner cylinder is machined at the side wall thereof to form the rib that is radially recessed, the outer cylinder is closed in the circumferential direction, and the inner cylinder is closed in the circumferential direction.

In the following, a number of alternatives are provided, but not as additional limitations to the above-mentioned general subject matter, and merely as further additions or preference. Without technical or logical contradiction, the alternatives can be combined individually with the above-mentioned general subject matter, or can be combined among them.

Optionally, the metal material is aluminum or aluminum alloy.

Optionally, the prong, the bead and the spiral are all made of the same metal material.

Optionally, a part of a side wall of the bead protrudes radially outwardly to form the slide block.

Optionally, at least two slide blocks are evenly distributed along a circumferential direction of the bead.

Optionally, the slide block is integrally engaged with the feed thread, or a surface of the slide block is provided with one or more ridges that are engaged with the feed thread.

Optionally, the inner wall of the spiral forms the feed thread by cutting.

Optionally, the feed thread is formed by deformation of a tube wall of the spiral.

Not forming part of the invention, optionally, the feed thread comprises a threaded bottom wall and two opposed threaded sidewalls, and an included angle between the threaded sidewall and the threaded bottom wall is <NUM> degrees to <NUM> degrees.

Not forming part of the invention, optionally, an inner wall of the bead is provided with a limiting protrusion for engaging the product.

Not forming part of the invention, optionally, a part of a side wall of the bead is cut to form a tab, and the tab is bent radially inward to form the limiting protrusion.

Not forming part of the invention, optionally, separable portions of the tab from the side wall of the bead includes three transverses connected in sequence, respectively:.

Optionally, the rib extends axially along an inner wall of the inner cylinder.

Optionally, a bottom end of the bead is a base, and a top end of the bead is a mouth, a height of the rib in the radial direction gradually decreases as the rib extends from the base toward the mouth.

Optionally, a plurality of said ribs are spaced apart on an inner wall of the inner cylinder.

The present application further provides a cosmetic packaging tube comprising the center tube core above, a top cover and a base.

Not forming part of the invention, optionally, the prong comprises a first inner section extending into the spiral and a first operation section located axially outside a bottom end of the spiral, wherein the slide slot is defined in the first inner section, the base is fixedly connected with the first operation section, the spiral is at least partially exposed outside the base, and the exposed portion has a smooth outer wall surface.

Not forming part of the invention, optionally, a positioning step is provided between the first inner section and the first operation section, and the bottom end of the spiral abuts against the positioning step.

Not forming part of the invention, optionally, an outer peripheral surface of the spiral is flush with an outer peripheral surface of the first operation section.

Not forming part of the invention, optionally, a bottom end of the first operation section is provided with a closing plate.

Not forming part of the invention, optionally, an outer wall of the prong is provided with a positioning groove extending in a circumferential direction, and the inner wall of the spiral is provided with a positioning protrusion engaged with the positioning groove.

Not forming part of the invention, optionally, the positioning groove is formed by deformation of a tube wall of the prong.

Not forming part of the invention, optionally, the positioning protrusion is formed by deformation of a tube wall of the spiral.

Not forming part of the invention, optionally, a plurality of positioning protrusions are provided and evenly distributed along a circumferential direction of the spiral.

Not forming part of the invention, optionally, an outer wall of the prong is provided with a positioning groove extending in a circumferential direction, and the inner wall of the spiral is provided with an annular positioning protrusion extending in a circumferential direction and engaged with the positioning groove.

Not forming part of the invention, optionally, the prong comprises a second inner section extending into the spiral and a second operation section located axially outside a top end of the spiral, and wherein the slide slot is defined in the second inner section, the spiral is fixedly connected with the base and is accommodated in the base.

Not forming part of the invention, optionally, an outer wall of the spiral has a deformation corresponding to the feed thread.

Not forming part of the invention, optionally, the second operation section extends into the top cover.

Not forming part of the invention, optionally, the bead is an axially penetrated tubular structure and comprises a product supporting portion and an extension portion distributed in an axial direction of the bead, and wherein the slide block is provided at the extension portion and the tubular structure has a reduced diameter region between the product supporting portion and the extension portion, and the reduced diameter region forms a product stop ring on an inner wall of the tubular structure.

Not forming part of the invention, optionally, the base, the spiral, and the prong are each provided with an avoidance opening corresponding to an inner cavity of the tubular structure.

Not forming part of the invention, optionally, a middle sleeve is fixedly inserted into an opened portion of the base, a gap is defined between the middle sleeve and the spiral in an axial direction of the base, which serves as an axial positioning groove, and a positioning ring is inserted into the axial positioning groove arranged on an outer periphery of the prong.

Not forming part of the invention, optionally, the side wall of the prong protrudes radially outwardly to form the positioning ring.

Not forming part of the invention, optionally, the spiral and the middle sleeve are both in an interference fit with the base.

Not forming part of the invention, optionally, one axial end of the base is provided with an opening for insertion of the prong and the other axial end is provided with a through hole whose periphery is an annular inner flange, and wherein an end of the spiral abuts against the inner flange.

Optionally, the base is made of metal material and has a smooth outer peripheral surface.

The present application also provides a not claimed processing method for a center tube core for processing the center tube core as described.

In the application, the center tube core is made of metal material, the product does not need to be disassembled during recycling, and can be recycled directly, with a simple and convenient operation.

In the figures, reference numerals are listed below:
<NUM>, prong; <NUM>, slide slot; <NUM>, positioning groove; <NUM>, positioning ring; <NUM>, first inner section; <NUM>, first operation section; <NUM>, positioning step; <NUM>, closing plate; <NUM>, second inner section; <NUM>, second operation section; <NUM>, spiral; <NUM>, feed thread; <NUM>, threaded bottom wall; <NUM>, threaded sidewall; <NUM>, positioning protrusion; <NUM>, annular positioning protrusion; <NUM>, flange; <NUM>, bead; <NUM>, slide block; <NUM>, outer cylinder; <NUM>, inner cylinder; <NUM>, rib; <NUM>, ridge, <NUM>, limiting protrusion, <NUM>, connecting end, <NUM>, free end, <NUM>, first transverse, <NUM>, second transverse, <NUM>, third transverse, <NUM>, fourth transverse, <NUM>, fifth transverse, <NUM>, sixth transverse; <NUM>, supporting portion; <NUM>, extension portion; <NUM>, product stop ring; <NUM>, avoidance opening; <NUM>, base; <NUM>, inner flange; <NUM>, middle sleeve; <NUM>, first insertion portion; <NUM>, second insertion portion; <NUM>, limiting ring; <NUM>, top cover.

The technical solutions according to the embodiments of the present disclosure will be described in combination with the drawings according to the embodiments of the present disclosure. The described embodiments represent some but not all the possible embodiments.

It should be noted that, when a component is "connected" with another component, it may be directly connected to another component or may be indirectly connected to another component through a further component. When a component is "provided" on another component, it may be directly provided on another component or may be provided on another component through a further component.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a person skilled in the art. The terms in the description of the present disclosure are used to describe specific embodiments, and not to limit the present disclosure. The term "and/or" used herein includes any combinations of one or more of the listed options, as well as the combination of all of the listed options.

In one embodiment, as shown in <FIG>, a cosmetic packaging tube includes a base <NUM>, a top cover <NUM> and a center tube core, and the center tube core is located inside a chamber defined by the base <NUM> and the top cover <NUM>. As shown in <FIG> and <FIG>, the center tube core includes a prong <NUM>, a spiral <NUM> rotatably surrounding the prong <NUM>, and a bead <NUM> slidably mounted in the prong <NUM> for supporting product. The side wall of the prong <NUM> is provided with an axially extending slide slot <NUM>. The outer wall of the bead <NUM> has a slide block <NUM> extending radially out of the slide slot <NUM>. The inner wall of the spiral <NUM> has a feed thread <NUM> acting on the slide block <NUM>.

The axial direction, i.e., the longitudinal direction of the center tube core, is also the direction of moving forth and back of the bead <NUM> in use, and the radial direction is a direction perpendicular to the axial direction. In use, the spiral <NUM> is rotated relative to the prong <NUM> to change the overlapping area of the feed thread <NUM> and the slide slot <NUM>, so that the bead <NUM> and the product can move forth and back in the axial direction.

In this embodiment, the prong <NUM>, the bead <NUM> and the spiral <NUM> are made of metal, with the same processing, thereby reducing the manufacturing cost and facilitating the recycling. Specifically, the metal material is aluminum or an aluminum alloy.

In one embodiment not forming part of the invention, as shown in <FIG> and <FIG>, the prong <NUM> includes a first inner section <NUM> extending into the spiral <NUM>, and a first operation section <NUM> axially outward of the bottom end of the spiral <NUM>, wherein the slide slot <NUM> is defined in the first inner section <NUM>. The user drives the bead <NUM> to retract into or extend from the center tube core by approaching the first operation section <NUM> and the spiral <NUM>, respectively, and rotating them relative to each other.

In one embodiment not forming part of the invention, as shown in <FIG> and <FIG>, the first operation section <NUM> is fixedly connected with the base <NUM> with an interference fit, an adhesive fit, or other fitting. In operation, the user only needs to hold the base. In this case, at least part of the spiral <NUM> is exposed outside the base <NUM>, and the exposed part has a smooth out surface, with a good touch feeling and visual effect and the traditional center bundle omitted.

In order to axially fix the spiral <NUM> and the prong <NUM>, as shown in <FIG> and <FIG>, the outer wall of the prong <NUM> is provide with a positioning groove <NUM> extending in the circumferential direction, and the inner wall of the spiral <NUM> is provided with a positioning protrusion <NUM> which fits into the positioning groove <NUM>. The positioning groove <NUM> can be formed by deformation of the tube wall of the prong <NUM>. The positioning protrusion <NUM> can be formed by deformation of the tube wall of the spiral <NUM>. A plurality of positioning protrusions <NUM> can be provided and distributed in the circumferential direction of the spiral <NUM>. In assembly, the spiral <NUM> surrounds the outside of the prong <NUM> in such a way that positioning projections <NUM> are engaged in the positioning groove <NUM>, thereby fixing the relative axial position of the prong <NUM> and the spiral <NUM> and allowing the prong <NUM> to rotate relative to the spiral <NUM>. The opening of the top end of the spiral <NUM> is provided with a flange <NUM> for limiting against the top end of the prong <NUM>.

In one embodiment not forming part of the invention, as shown in <FIG>, the outer wall of the prong <NUM> is provided with a positioning groove extending in the circumferential direction, and the inner wall of the spiral <NUM> is provided with an annular positioning protrusion <NUM> extending in the circumferential direction, and the annular positioning protrusion <NUM> is engaged in the positioning groove.

In one embodiment not forming part of the invention, as shown in <FIG>, a positioning step <NUM> is defined between the first inner section <NUM> and the first operation section <NUM>, and the bottom end of the spiral <NUM> abuts against the positioning step <NUM>. As shown in <FIG>, the outer peripheral surface of the spiral <NUM> is flush with the outer peripheral surface of the first operation section <NUM>, so as to increase the aesthetic appearance of the product and reduce the possible bumping area with the environment.

As shown in <FIG>, the bottom end of the first operation section <NUM> is provided with a closing plate <NUM>. The closing plate <NUM> closes the bottom end of the prong <NUM> to prevent external contaminants from entering through the bottom end of the bead <NUM> and contaminating the paste in the bead <NUM>. In one embodiment not forming part of the invention, the axial length of the first operation section <NUM> is <NUM> / <NUM> to <NUM> / <NUM> of the axial length of the prong <NUM>.

In one embodiment not forming part of the invention, a part of the side wall of the bead <NUM> projects radially outwardly to form the slide block <NUM>. For example, a portion of the metal tube wall can be drawn outwardly to form the slide block <NUM>. In particular, at least two slide blocks <NUM> are evenly distributed in the circumferential direction of the bead <NUM>. As shown in <FIG> and <FIG>, the slide block <NUM> is integrally engaged into the feed thread <NUM>.

Specifically, in one embodiment, as shown in <FIG>, one or more ridges <NUM> are formed on the surface of the slide block <NUM>, and each ridge <NUM> is engaged into the feed thread <NUM>. For example, the slide block <NUM> is made of a metal material, and a precise ridge structure can be formed by a drawing process. The feed thread <NUM> is also made of a metal material to ensure the precise fitting with the ridge <NUM>. A ridge <NUM> is engaged into one of the feed threads <NUM> so that one slide block <NUM> is simultaneously engaged with a plurality feed threads <NUM>, thereby dispersing the contact stress between the slide block <NUM> and the feed threads <NUM>, preventing local excessive deformation, and improving the sliding stability of the bead <NUM>.

There are various ways of forming the feed thread <NUM>, and in one embodiment, the feed thread <NUM> is formed on the inner wall of the spiral <NUM> by cutting. In another embodiment, the spiral <NUM> forms the feed thread <NUM> by deformation of the tube wall itself.

In particular, in one of the embodiments, the feed thread <NUM> can be formed by rolling the wall of the spiral <NUM> in combination of rotation and axial feed.

In particular, in one of the embodiments, the tube having a smooth outer peripheral surface is pressed by a die inside and outside the tube, respectively, so that the inner peripheral surface of the tube forms the feed thread <NUM>.

In one embodiment not forming part of the invention, as shown in <FIG>, the feed thread <NUM> includes a threaded bottom wall <NUM> and two opposed threaded sidewalls <NUM>, and an included angle (i.e., angle a shown in <FIG>) between the threaded sidewall <NUM> and the threaded bottom wall <NUM> is <NUM> degrees to <NUM> degrees.

The product is generally a paste. In order to ensure that the product is firmly fixed in the bead <NUM>, the inner wall of the bead abuts against or is inserted into the paste through a limiting protrusion <NUM>, thereby further preventing the product from sliding along the axial direction.

The pasty product can be pre-molded and then axially loaded into the bead <NUM>, or be molded by injecting the starting material into the bead <NUM>. There are various ways of processing the limiting protrusion <NUM>. For example, the side wall of the bead <NUM> can be pressed inward in such a way that a part of the side wall is deformed to protrude inward, and the outside of the bead <NUM> is concaved.

Not forming part of the invention, in order to facilitate the axial loading of the pre-cured product into the bead <NUM>, preferably, a part of the side wall of the bead <NUM> is cut to form a tab, which is bent radially inward to form the limiting protrusion. Specifically, slot(s) can be cut on the metal side wall of the bead <NUM> along a non-closed path, and then the tab partially surrounded by the slot(s) is pushed inward to form the limiting protrusion <NUM>.

In one embodiment not forming part of the invention, as shown in <FIG>, the separable portion of the tab from the side wall of the bead includes three transverses connected in sequence, i.e., a first transverse <NUM> extending along the circumferential direction of the bead, a second transverse <NUM> extending from one end of the first transverse <NUM> toward the top along the axial direction of the bead, and a third transverse <NUM> extending from the other end of the first transverse <NUM> toward the top along the axial direction of the bead, respectively.

In another embodiment not forming part of the invention, as shown in <FIG>, the separable portion of the tab from the side wall of the bead includes three transverses connected in sequence, i.e., a fourth transverse <NUM> extending axially along the bead, a fifth transverse <NUM> extending circumferentially from one end of the fourth transverse <NUM>, and a sixth transverse <NUM> extending circumferentially from the other end of the fourth transverse <NUM>. The fifth transverse <NUM> and the sixth transverse <NUM> are on the same side of the fourth transverse <NUM>.

Not forming part of the invention, specifically, as shown in <FIG> and <FIG>, the tab has a connecting end <NUM> connected to the side wall of the bead <NUM>, and a free end <NUM> extending inside the bead <NUM>, the connecting end <NUM> being closer to the entrance of the bead <NUM> than the free end <NUM>. When the product is loaded into the bead <NUM>, the limiting protrusion <NUM> of the metal plate structure avoids the product through an elastic deformation, thereby reducing the resistance to the product loading. After the product is loaded into the bead <NUM>, when there is a tendency for the product to come out of the bead <NUM> in the axial direction, the free end <NUM> is inserted into the paste of the product to form a barbed structure to prevent the product from coming out of the bead <NUM>.

In one embodiment, as shown in <FIG>, <FIG>, the bead <NUM> includes an outer cylinder <NUM> and an inner cylinder <NUM>, the outer cylinder <NUM> is provided with the slide block <NUM>, and the inner cylinder <NUM> is provided with an axially extending rib <NUM>. The bottom end of the bead <NUM> is a base, and the top end of the bead <NUM> is a mouth. The height of the rib <NUM> in the radial direction gradually decreases as the rib <NUM> extends from the base toward the mouth. In one embodiment, the rib <NUM> is formed by a radially inwardly recession of the wall of the inner cylinder. The rib <NUM> functions as a limiting protrusion and is mainly used to limit the paste to fall off.

In another embodiment, as shown in <FIG> and <FIG>, the cosmetic packaging tube includes a base <NUM>, a top cover <NUM> and a center tube core which is located in a chamber defined by the base <NUM> and the top cover <NUM>. The center tube core includes a prong <NUM>, a spiral <NUM> rotatably surrounding the prong <NUM>, and a bead <NUM> slidably mounted in the prong <NUM> for supporting product. The side wall of the prong <NUM> is provided with an axially extending slide slot <NUM>. The outer wall of the bead <NUM> has a slide block <NUM> extending radially out of the slide slot <NUM>. The inner wall of the spiral <NUM> has a feed thread <NUM> acting on the slide block <NUM>.

In this embodiment, the prong <NUM>, the bead <NUM> and the spiral <NUM> are all made of metal.

Not forming part of the invention, as shown in <FIG> and <FIG>, the prong <NUM> includes a second inner section <NUM> extending into the spiral <NUM>, and a second operation section <NUM> located outside the top end of the spiral <NUM> in the axial direction. The slide slot <NUM> is defined in the second inner section <NUM>.

Not forming part of the invention, in assembly, the base <NUM> is fixedly connected to the spiral <NUM>, the spiral <NUM> is integrally received in the base <NUM>, and the second operation section <NUM> is exposed from the base <NUM>. The base <NUM> and the spiral <NUM> are generally connected by an interference fit, although can be connected by bonding or the like.

In an embodiment not forming part of the invention, as shown in <FIG>, <FIG> and <FIG>, the bead <NUM> is an axially penetrated tubular structure, and includes a product supporting portion <NUM> and an extension portion <NUM> distributed in the axial direction of the bead <NUM>. The slide block <NUM> is provided on the extension portion <NUM>. The limiting protrusion <NUM> is provided on the product supporting portion <NUM>. The tubular structure has a reduced diameter region between the product supporting portion <NUM> and the extension portion <NUM>, which forms a product stop ring <NUM> on the inner wall of the tubular structure. The limiting protrusion <NUM> mainly prevents the product from rotating, and the product stop ring <NUM> mainly prevents the product from sliding in the axial direction.

Not forming part of the invention, as shown in <FIG> and <FIG>, the outer wall of the spiral <NUM> has a deformation corresponding to the feed thread <NUM>. The feed thread <NUM> in this embodiment is produced by deformation of the tube wall of the spiral <NUM> in the radial direction, which causes the outer wall of the spiral <NUM> to have an uneven structure. It should be noted that "smooth" used herein is a term relative to the uneven structure corresponding to the feed thread <NUM> in form, and the surface roughness of the material used for the spiral <NUM> is not strictly limited. A spiral <NUM> having a rough outer peripheral surface is also within the scope of the present application.

The term of "all-metal" used herein refers to the three main parts, namely, the prong <NUM>, the bead <NUM> and the spiral <NUM>. Undoubtedly, the center tube core may also include other additional parts, and the material of these additional parts is not strictly limited.

In one embodiment, the base <NUM> and the top cover <NUM> are also made of metal and have smooth outer peripheral surfaces.

In one embodiment, the prong <NUM>, the bead <NUM>, the spiral <NUM> and the base <NUM> are made of the same metal.

Not forming part of the invention, the spiral <NUM>, the prong <NUM> and the base <NUM> are each provided with an avoidance opening <NUM> corresponding to the inner cavity of the tubular structure, and by providing the avoidance opening <NUM>, the product can be loaded into the center tube core from the bottom end.

Not forming part of the invention, one axial end of the base <NUM> is provided with an opening for the insertion of the center tube core, and the other axial end is provided with a through hole whose periphery is an annular inner flange <NUM> against which the end of the spiral <NUM> abuts.

Not forming part of the invention, a middle sleeve <NUM> is fixedly inserted into the opening of the spiral <NUM>, and a gap is defined between the middle sleeve <NUM> and the spiral <NUM> in the axial direction of the base <NUM>, which serves as an axial positioning groove. A positioning ring <NUM> is inserted into the axial positioning groove on the outer periphery of the prong <NUM>. The side wall of the prong <NUM> projects radially outwards to form the positioning ring <NUM>.

Not forming part of the invention, as shown in <FIG>, the middle sleeve <NUM> is an axially penetrated tubular structure, and includes a first insertion portion <NUM> and a second insertion portion <NUM> distributed in the axial direction of the middle sleeve <NUM>. The first insertion portion <NUM> and the second insertion portion <NUM> are separated by a limiting ring <NUM>. The first insertion portion <NUM> is inserted into the base <NUM> and fixed to the base <NUM> by interference fit.

In one embodiment not forming part of the invention, the production process of the all-metal center tube core includes: processing the side wall of the bead <NUM> to form the slide block <NUM> that protrudes radially outwardly, and forming the inwardly turned tab by cutting the side wall of the bead <NUM>; assembling the bead <NUM> into the prong <NUM> with the slide slot <NUM> on the side wall thereof in such a way that the slide block <NUM> extends radially out of the slide slot <NUM>; forming the feed thread <NUM> acting on the slide block <NUM> on the inner wall of the spiral <NUM> having a smooth outer peripheral surface; and assembling the prong <NUM> into the spiral <NUM> in such a way that the slide block <NUM> is engaged with the feed thread <NUM>.

In another embodiment, the bead <NUM> is formed by assembling the outer cylinder <NUM> and the inner cylinder <NUM> by interference fit, wherein the outer cylinder <NUM> is machined at the side wall thereof to form a slide block that protrudes radially outwardly, and the inner cylinder <NUM> is machined at the side wall thereof to form the rib <NUM> that is radially recessed.

In another embodiment not forming part of the invention, a die is used to extrude a tube inside and outside, respectively, so that the inner peripheral surface of the tube forms the feed thread <NUM>, and the outer peripheral surface of the tube forms a deformation corresponding to the feed thread <NUM>.

In one embodiment not forming part of the invention, as shown in <FIG> and <FIG>, the assembly of the prong <NUM> with the spiral <NUM> includes: forming the circumferentially extending positioning groove <NUM> on the prong <NUM>; forming the plurality of positioning protrusions <NUM> evenly distributed along the circumferential direction on the inner wall of the spiral <NUM>; and surrounding the spiral <NUM> around the prong <NUM> in such a way the positioning protrusions <NUM> are engaged into the positioning groove <NUM>.

In another embodiment not forming part of the invention, as shown in <FIG>, the assembly of the prong <NUM> with the spiral <NUM> includes: surrounding the spiral <NUM> around the prong <NUM>; extruding the spiral <NUM> and the prong <NUM> simultaneously inside the prong <NUM> and outside the spiral <NUM> to form the circumferentially extending positioning groove <NUM> on the prong <NUM> and the circumferentially extending annular positioning protrusion <NUM> on the inner wall of the spiral <NUM> and engaged into the positioning groove.

Not forming part of the invention, the present application further provides a process for the cosmetic packaging tube. In one embodiment, the base <NUM> is fixedly connected with the bottom of the prong <NUM>, the top cover <NUM> is surrounded around the center tube core. As shown in <FIG>, the top cover <NUM> is engaged with the base <NUM>, and the center tube core is received in an interior space where the two are enclosed.

In another embodiment not forming part of the invention, the base <NUM> is in an interference fit with the spiral <NUM> such that the spiral <NUM> is completely received within the base. The mouth of the base <NUM> is provided with the middle sleeve <NUM>, which is inserted into the base and in an interference fit therewith, and cooperates with the spiral <NUM> to limit the axial movement of the prong. The top cover <NUM> surrounds around the exposed part of the center tube core, and cooperates with the base <NUM> and the middle sleeve <NUM> to enclose the center tube core in the inner space of the three.

The features described in the above various embodiments may be combined. In order to simplify the descriptions, not all possible combinations of the features in the above embodiments have been described. However, any combinations of the features should be within the scope of the invention as long as no conflict resides between these features. In the case where the features in different embodiments are shown in the same drawing, it may be considered that this drawing discloses a combination of the various embodiments involved.

Claim 1:
A center tube core, comprising a prong (<NUM>), a spiral (<NUM>) rotatably surrounding the prong (<NUM>) and a bead (<NUM>) slidably provided in the prong (<NUM>) for supporting product, wherein a side wall of the prong (<NUM>) is provided with a slide slot (<NUM>) extending in an axial direction, an outer wall of the bead (<NUM>) is provided with a slide block (<NUM>) extending out of the slide slot (<NUM>) in a radial direction, and an inner wall of the spiral (<NUM>) is provided with a feed thread (<NUM>) acting on the slide block (<NUM>), and wherein the prong (<NUM>), the bead (<NUM>) and the spiral (<NUM>) are all made of metal material; characterized in that
the bead (<NUM>) comprises an inner cylinder (<NUM>) and an outer cylinder (<NUM>) surrounded one around the other, and wherein an outer wall of the outer cylinder (<NUM>) is provided with the slide block (<NUM>), and
wherein the bead (<NUM>) is formed by assembling the outer cylinder (<NUM>) and the inner cylinder (<NUM>) by interference fit, the outer cylinder (<NUM>) is machined at the side wall thereof to form the slide block (<NUM>) that protrudes radially outwardly, and the inner cylinder (<NUM>) is machined at the side wall thereof to form a rib (<NUM>) that is radially recessed, the outer cylinder (<NUM>) is closed in the circumferential direction, and the inner cylinder (<NUM>) is closed in the circumferential direction .