CN212139698U - Screw for lipstick dispenser system and lipstick dispenser - Google Patents

Abstract

Example embodiments include a screw and lipstick dispenser for a lipstick dispenser system. The helix comprises a sleeve having an open end and an opposite base end, the sleeve further comprising at least one helix disposed on an inner wall of the sleeve. The edge of the base end includes a resilient portion including a plurality of tabs extending therefrom and a plurality of elongated slots cut circumferentially along the resilient portion, the elongated slots being side by side with each tab, each slot spanning and exceeding the entire length of the respective tab. The plurality of protrusions may interact with a base flange of the inner body to create friction for the lipstick dispenser, such that the friction provides a consistent rotational torque when screw-coupled to the inner body and the cup to form the lipstick dispenser. Other example embodiments are also described.

Description

Screw for lipstick dispenser system and lipstick dispenser

Technical Field

The utility model relates to a lipstick or lipstick packing technical field. The present invention relates to cosmetics dispensers, and more particularly, to a screw for a lipstick dispenser system and a lipstick dispenser having the same.

Background

Lipstick or lip balm is popular with women. The lipstick dispenser is generally composed of an outer casing, a spiral, a cup and an inner body, and the user can control the lifting of the lipstick formula (lipstick core) by matching the protrusion on the cup containing the lipstick formula with the longitudinal guide groove of the inner body and the spiral line of the spiral. However, due to dimensional errors occurring when mass-producing the components, gaps are liable to occur between the components. It is difficult and expensive to strictly control the dimensions of the components to ensure fit in mass production. There is a need for an improved lipstick dispenser.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing background, it is an object of the present invention to provide an improved screw for a lipstick dispenser system and a lipstick dispenser with such a screw.

Accordingly, in a first aspect, the present invention provides a screw for a lipstick dispenser system. The helix comprises a sleeve having an open end and an opposite base end, the sleeve further comprising at least one helix disposed on an inner wall of the sleeve. The edge of the base end includes a resilient portion including a plurality of tabs extending therefrom and a plurality of elongated slots cut circumferentially along the resilient portion, the elongated slots being side by side with each tab, each slot spanning and exceeding the entire length of the respective tab. The plurality of protrusions may interact with a base flange of the inner body to create friction for the lipstick dispenser, such that the friction provides a consistent rotational torque when screw-coupled to the inner body and the cup to form the lipstick dispenser.

In a second aspect, the present invention provides a lipstick dispenser comprising a cup, a tubular inner body and a spiral. The cup is configured to receive a lipstick and has at least one radially extending lug. A tubular inner body having an open end and an opposite base end, the inner body further including a first flange extending adjacent the open end and a second flange extending adjacent the base end, the inner body further defining at least one longitudinally extending guide slot for guiding a lug. The helix includes a sleeve having an open end and a base end, the sleeve being sized and shaped to telescope over the inner body, and further including at least one helix disposed therein to receive the at least one lug. The base end comprises a resilient portion comprising a plurality of circumferentially disposed long narrow gaps; and a rim including a plurality of resilient undulating friction pads along a base end of the gap that interact with the second flange of the inner body to generate friction for the lipstick dispenser such that the friction pads provide a consistent rotational torque to the lipstick dispenser.

Other example embodiments are discussed herein.

The utility model has many advantages. In some embodiments, the screw is easily adapted to his existing lipstick dispenser system. In some embodiments, the production cost is low due to its simple and easy design. In certain embodiments, the present invention solves the problem of dimensional errors in the mass production of each component resulting in a component, particularly an easy clearance between the screw and the inner body, that provides consistent rotational torque for a lipstick dispenser system, thereby providing a high quality and luxurious experience of lipstick for the user.

Drawings

FIG. 1 shows an exploded view of a lipstick dispenser according to one example embodiment.

Figure 2A illustrates a side view of a lipstick dispenser after assembly, according to one example embodiment.

Figure 2B shows a cross-sectional view of the lipstick dispenser as shown in section B-B of figure 2A.

Figure 2C shows a close-up view of R' of the lipstick dispenser as shown in figure 2B.

Figure 2D shows a close-up view P' of the lipstick dispenser as shown in figure 2B.

FIG. 3A shows a side view of a spiral according to an example embodiment.

Figure 3B shows a cross-sectional view a-a of the spiral as shown in figure 3A.

Fig. 3C shows a close-up view of the spiral as shown in fig. 3A.

FIG. 4 illustrates a schematic diagram comparing structural changes before and after assembly of a spiral according to an example embodiment; (A) is a cross-sectional view of the inner body; (B) is a spiral before assembly; (C) is an assembled spiral.

Fig. 4C' shows a partial enlarged view of the spiral as shown in fig. 4 (C).

Detailed Description

As used herein and in the claims, "comprising" means including the following elements, but not excluding others.

As used herein and in the claims, "coupled" means physically joined or connected, directly or indirectly, to other elements.

As used herein and in the claims, a "flange" is a radially extending edge of the outer wall of the inner body.

One embodiment of the present invention provides a screw for a lipstick dispenser system. The helix comprises a sleeve having an open end and an opposite base end, the sleeve further comprising at least one helix disposed on an inner wall of the sleeve. The edge of the base end includes a resilient portion including a plurality of tabs extending therefrom and a plurality of elongated slots cut circumferentially along the resilient portion, the elongated slots being side by side with each tab, each slot spanning and exceeding the entire length of the respective tab. The plurality of protrusions may interact with a base flange of the inner body to create friction for the lipstick dispenser, such that the friction provides a consistent rotational torque when screw-coupled to the inner body and the cup to form the lipstick dispenser.

In one embodiment, each of the plurality of tabs has a trapezoidal shape with a long side and a short side, the long side of the trapezoid being proximal to the slot and the short side of the trapezoid extending away from the slot to form a portion of an edge of the resilient portion, each slot including a first long side, a second long side, and two short sides, the first long side of each slot being positioned toward the open end and the second long side of the slot being positioned proximate the edge of the resilient portion, the second long side further including a trapezoid expansion such that the slot is formed in a substantially T-shape having arms that circumferentially span along the resilient portion and a stem that extends into the tab, the edge of the stem having the same shape as the edge of the tab such that the tab forms a thin strip of uniform thickness along the second long side of the slot.

In one embodiment, the plurality of projections are equally spaced.

In one embodiment, the spiral comprises two opposing spiral lines to receive two respective lugs of the cup.

Another embodiment of the present invention provides a lipstick dispenser comprising a cup, a tubular inner body and a spiral. The cup is configured to receive a lipstick and has at least one radially extending lug. A tubular inner body having an open end and an opposite base end, the inner body further including a first flange extending adjacent the open end and a second flange extending adjacent the base end, the inner body further defining at least one longitudinally extending guide slot for guiding a lug. The helix includes a sleeve having an open end and a base end, the sleeve being sized and shaped to telescope over the inner body, and further including at least one helix disposed therein to receive the at least one lug. The base end comprises a resilient portion comprising a plurality of circumferentially disposed long narrow gaps; and a rim including a plurality of resilient undulating friction pads along a base end of the gap that interact with the second flange of the inner body to generate friction for the lipstick dispenser such that the friction pads provide a consistent rotational torque to the lipstick dispenser.

In one embodiment, the plurality of gaps and pads are equally spaced.

In one embodiment, the resilient portion allows for a tolerance of between 0.1-0.3mm when the screw is assembled to the inner body.

In one embodiment, the screw comprises two opposing screw threads, the inner body comprises two opposing guide slots, and the cup comprises two opposing lugs, each lug being joined to a respective screw thread via a respective guide slot.

In one embodiment, the lipstick dispenser further comprises a housing mounted on an outer surface of the spiral.

In one embodiment, the longitudinal length of the friction pad is between 0.7-0.9 mm.

Fig. 1 shows a lipstick dispenser 1010 according to an example embodiment. In one embodiment, the lipstick dispenser 1010 forms a lipstick dispenser system with a cover (not shown) and a base (not shown). In this embodiment, the lipstick dispenser 1010 includes an inner body 1200, a cup 1400, a spiral 1600 and an outer casing 1800. In another embodiment, the lipstick dispenser 1010 does not include the outer casing 1800 and only includes the inner body 1200, the cup 1400 and the spiral 1600.

The cup 1400 is configured to receive a lipstick formulation therein and has at least one radially extending ledge 1410. In this embodiment, the cup 1400 has two opposing lugs 1410. The underside inner surface of the cup 1400 may have a plurality of prongs (not shown) to facilitate securing the lipstick formulation.

The inner body 1200 includes a substantially cylindrical tubular channel 1210 and a base 1212. The inner body 1200 has an open end 1214 from which lipstick may extend and an opposite base end 1216. For convenience of description, a direction toward the open end is referred to as an upper direction, and another direction toward the base end is referred to as a lower direction. The base 1212 is fixedly connected to the channel 1210 or is integrally formed with the channel 1210 and has outwardly extending and equally spaced teeth. The channel 1210 of the inner body 1200 also defines two substantially longitudinally extending guide slots 1218 on opposite sides for guiding movement of the outwardly extending ledges 1410 of the cup 1400. The diameter of the cross-section of the inner body 1200 is set slightly larger than the diameter of the cup 1400 to receive the cup 1400 therein. In this embodiment, the channel 1218 is substantially Z-shaped. The channel 1210 of the inner body 1200 further includes a first flange 1220 extending outwardly near the open end 1210 and a second flange 1222 extending near the base end 1212, when assembled, the spiral being defined between the first flange 1220 and the second flange 1222 for limiting axial and/or longitudinal movement of the spiral. In one embodiment, the inner body 1200 may be made of polystyrene, such as High Impact Polystyrene (HIPS).

The helix 1600 includes a sleeve 1610 having an open end 1612 and a base end 1614, the helical sleeve 1610 being sized and shaped to telescope over the inner body 1200, its cross-sectional diameter being configured to be slightly larger than the diameter of the inner body, and further including each helix (as will be more clearly described in fig. 3B) disposed therein to receive at least one corresponding lug. The edge of the underside of the base end 1614 of the helix 1600 includes a resilient portion 1618 (as will be more clearly described in figure 3C). The resilient portion 1618 includes two opposing tabs 1620 extending therefrom and two opposing elongated slots 1628 cut circumferentially along the resilient portion 1618, the elongated slots 1628 being side by side with each tab 1620, each slot 1628 spanning and exceeding the entire length of the respective tab 1620. In one embodiment, helix 1600 may be made of a flexible plastic. In one embodiment, the flexible plastic may be Polyoxymethylene (POM), polyethylene terephthalate (PET) and/or Polyketone (POK). The spiral 1600 will be described in more detail in fig. 3A-3C.

Optionally, outer casing 1800 may be provided to accommodate the sleeve 1610 of the spiral 1600. The outer casing 1800 is substantially cylindrical. It will be appreciated that the diameter of the cross-section is set slightly larger than the diameter of the screw 1600. In one embodiment, the outer casing 1800 may be made of metal, such as aluminum.

For convenience of description, all subsequent drawings having the same reference numerals refer to the same parts, and the description of each drawing will not be repeated.

Referring now to fig. 2A and 2B, there is shown a side view of a lipstick dispenser assembly and one embodiment of a section B-B thereof. In this embodiment, the lipstick dispenser 1010 includes an outer casing 1800, a spiral 1600, an inner casing 1400 and a cup 1200 that are coaxially sleeved from outside to inside. Figures 2C and 2D show enlarged partial views of R 'and P', respectively, of the lipstick dispenser as shown in figure 2B. Fig. 2C shows that the upper edge of the second flange 1222 (or base flange) of the lower proximal base end of the inner body can be in direct contact with the lower edge of the resilient portion of the spiral (including the lower edge of the protrusion 1620), while fig. 2D shows that the lower edge of the first flange 1220 of the proximal open end of the inner body 1200 can be in direct contact with the upper edge of the spiral 1600. It will be appreciated that a close fit between the ends of the spiral 1600 and the first and second flanges 1220, 1222 may be achieved when the longitudinal spacing of the spiral 1600 from the open end 1214 to the lower end of the projection 1620 is set slightly greater than the longitudinal spacing between the two flanges (fig. 1).

Referring now to fig. 3A and 3B, a more detailed structure of the modified spiral 1600 is shown. In this embodiment, the spiral 1600 has a sleeve 1610 with an open end 1612 and an underlying opposite base end 1614, and a resilient portion 1618 on the underside of the sleeve 1610. In this embodiment, the sleeve 1610 is integrally formed with a resilient portion 1618, the outer diameter of the resilient portion 1618 being slightly larger than the outer diameter of the sleeve and the inner diameter of the outer casing to constrain the outer casing in the desired position. In another embodiment, the sleeve 1610 is fixedly attached to the resilient portion 1618, and the sleeve 1610 and the resilient portion 1618 may not be made of the same material. In this embodiment, the sleeve 1610 is substantially cylindrical and hollow with a uniform inner diameter from the upper end to the lower end, and a decreasing outer diameter above and proximate to the open end, the open end further having three equally spaced grooves along the circumference. The inner wall of sleeve 1610 also has a helical wire 1616. In one embodiment, the inner wall of the sleeve 1610 has two opposing helical wires 1616 to receive two corresponding lugs 1410 on the cup 1400. In another embodiment, the inner wall of the sleeve 1610 may have only one helical wire 1616 to receive a corresponding lug 1410 on the cup 1400.

In this embodiment, the resilient portion 1618 includes two opposing tabs 1620 extending therefrom and two elongated slots 1628 cut circumferentially through the resilient portion 1618. Each elongated slot 1628 is positioned side-by-side above each tab 1620, with each slot 1628 spanning and exceeding the entire length of the corresponding tab 1620. The protrusion 1620 can interact with the base flange 1216 of the inner body 1200 to create a friction force that causes the screw 1600 and the inner body 1200 to mate such that the friction force provides a consistent rotational torque when the screw is coupled to the inner body 1200 and the cup 1400 to form the lipstick dispenser.

As shown in fig. 3C, each of the plurality of tabs 1620 has a generally inverted trapezoidal shape with a long side 1622 and a short side 1624, the long side 1622 of the trapezoid being proximate to the slot 1628 and the short side 1624 of the trapezoid being below extending away from the slot 1628 to form a portion of an edge of the resilient portion 1618, the perimeter of each slot 1628 including an upper first long side 1630, a lower second long side 1632, and two short sides 1634, the first long side 1630 of each slot 1628 being positioned toward the open end 1612 and the second long side 1632 of the slot 1628 being positioned proximate to an edge of the resilient portion 1618, the second long side 1632 further including a trapezoidal expansion 1636 such that the slot 1628 forms a generally T-shaped space. The T-shape has an arm 1640 and a stem 1642, the arm 1640 circumferentially spanning along the resilient portion 1618, the stem 1642 extending into the tab 1620, an edge of the stem 1642 having substantially the same inverted trapezoidal shape as an edge of the tab 1620, such that the tab 1620 forms a thin strip 1650 of uniform thickness along the second long side 1632 of the slot 1628. In another embodiment, the edge of the protrusion 1620 may have a different shape than the edge of the stem portion 1642, and the web 1650 may have a non-uniform thickness. The trapezoids and T-shapes described herein may be angled or rounded shapes. The web 1650 will become part of a friction pad (not shown, described in more detail in fig. 4) after assembly.

Referring now to fig. 4, showing the change in configuration of the spiral before and after assembly into a lipstick dispenser, the longitudinal spacing between the first flange 1220 and the second flange 1222 of the inner body 1200 is shown in upper and lower dashed lines (a). Before assembly, the longitudinal length of the spiral 1600 from the open end to the lower end of the projection is greater than the longitudinal length between the first flange 1220 and the second flange 1222, the difference being indicated by L (B). The helical sleeve is sized and shaped to telescope over the inner body. After assembly, since the protrusion 1620 of the elastic portion 1618 has elastic force, the protrusion 1620 is pushed upward to be deformed, and thus the second long side 1632 of the slot 1628 is also deformed (C). Referring now to fig. 4C', in this embodiment, the assembled deformed resilient portion 1618 and second flange 1222 (not shown) form two circumferentially disposed long narrow gaps 1644, and a deformed edge 1632, including a plurality of resilient undulating friction pads 1648 along the base end of the gaps 1644 and a plurality of recesses 1652 alternating therewith. The friction pad 1648 interacts with a second flange (not shown) of the inner body to create sufficient friction. With the use of a spiral as described herein, this arrangement can be formed when the resilient portion is urged by the second flange. In one embodiment, two gaps 1644 are equally spaced apart by a friction pad 1648. The friction pad 1648 interacts with the second flange 1222 of the inner body 1200 to create friction for the lipstick dispenser, causing the inner body and the screw to mate, whereby the friction pad 1648 provides a consistent rotational torque to the lipstick dispenser. The design of the helical spring portion allows dimensional tolerances in the assembly of the screw and the inner body in high volume production to result in assembly problems, particularly the tendency for play between the screw and the inner body. In one embodiment, the resilient portion allows for a tolerance of between 0.1-0.3 mm. In one embodiment, the longitudinal length of the friction pad is between 0.7-0.9 mm. In another embodiment, the longitudinal length of the friction pad is between 0.5-1.5mm and even wider. It will be appreciated that the longitudinal length of the friction pad may be suitably adjusted according to the actual configuration.

Obviously, the screw and lipstick dispenser of the present invention may be applied to other rotary cosmetic formulations, such as cream foundations. The spiral of the present invention may be adapted to other existing cups, to inner bodies with flanges, to outer casing and the like to form an improved cosmetic dispenser system.

Accordingly, exemplary embodiments of the present invention have been fully described. Although the description refers to particular embodiments, it will be apparent to those skilled in the art that the present invention may be practiced with modification of these specific details. Accordingly, the invention should not be construed as limited to the claims set forth below or the examples set forth herein.

Claims (10)

1. A screw for a lipstick dispenser system comprising a sleeve having an open end and an opposite base end;

the sleeve further comprises at least one helical line disposed on an inner wall of the sleeve;

wherein the base end edge comprises a resilient portion comprising a plurality of tabs extending therefrom and a plurality of elongate slots cut circumferentially along the resilient portion, the elongate slots being side by side with each tab, each slot spanning and exceeding the entire length of the respective tab;

wherein the plurality of protrusions can interact with the base flange of the inner body to create friction for the lipstick dispenser,

thus, when the screw is coupled to the inner body and cup to form a lipstick dispenser, the friction provides a consistent rotational torque.

2. The spiral of claim 1,

each of the plurality of tabs having a trapezoidal shape with a long side and a short side, the long side of the trapezoid being proximate to the slot and the short side of the trapezoid extending away from the slot to form a portion of an edge of the resilient portion,

each slot comprises a first long side, a second long side, and two short sides, the first long side of each slot being positioned towards the open end and the second long side of the slot being positioned adjacent an edge of the resilient portion, the second long side further comprising a trapezoidal bulge such that the slot is formed in a substantially T-shape having arms that circumferentially span along the resilient portion and a stem that extends into the tab, the edge of the stem having the same shape as the edge of the tab such that the tab forms a thin strip of uniform thickness along the second long side of the slot.

3. The spiral of claim 1, wherein the plurality of projections are equally spaced.

4. The spiral of claim 1, wherein the spiral comprises two opposing spiral threads to receive two corresponding lugs of a cup.

5. A lipstick dispenser comprising

A cup configured to receive a lipstick and having at least one radially extending lug;

a tubular inner body having an open end and an opposite base end, the inner body further comprising a first flange extending adjacent the open end and a second flange extending adjacent the base end, the inner body further defining at least one longitudinally extending guide slot for guiding a lug; and

a helix including a sleeve having an open end and a base end, the sleeve being sized and shaped to telescope over the inner body and further including at least one helix disposed therein to receive the at least one lug;

characterized in that said base end comprises a resilient portion, said resilient portion comprising

A plurality of circumferentially disposed long narrow gaps; and

a lip including a plurality of resilient undulating friction pads along a base end of the gap that interact with the second flange of the inner body to create friction for the lipstick dispenser,

thus, the friction pad provides a consistent rotational torque to the lipstick dispenser.

6. The lipstick dispenser according to claim 5, wherein said plurality of gaps and pads are equally spaced.

7. A lipstick dispenser according to claim 5, characterised in that said elastic portion allows a tolerance of between 0.1 and 0.3mm when said screw is assembled to said inner body.

8. The lipstick dispenser according to claim 5, wherein said helix comprises two opposing spirals, said inner body comprises two opposing guide channels, and said cup comprises two opposing lugs, each lug engaging a respective spiral via a respective guide channel.

9. The lipstick dispenser according to claim 5, further comprising a housing mounted on an outer surface of said spiral.

10. The lipstick dispenser according to claim 5, wherein said friction pad has a longitudinal length between 0.7 mm and 0.9 mm.

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