CN117045033A

CN117045033A - Plastic piston, plug rod combination and rotary discharging container

Info

Publication number: CN117045033A
Application number: CN202210482945.6A
Authority: CN
Inventors: 杨海英
Original assignee: Shyahsin Packaging China Co Ltd
Current assignee: Shyahsin Packaging China Co Ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2023-11-14
Also published as: WO2023213143A1

Abstract

The embodiment of the application discloses a plastic piston, a plug rod combination and a rotary discharging container, which belong to the field of cosmetic packaging materials. Because the hardness of the screw tooth part is larger than that of the main body, the application can improve the strength between the screw tooth part and other engaged accessories while ensuring the air tightness of the plastic piston body through softer materials, so that the screw tooth part cannot be damaged due to overlarge assembly torque.

Description

Plastic piston, plug rod combination and rotary discharging container

Technical Field

The embodiment of the application relates to the field of cosmetic packaging materials, in particular to a plastic piston and plug rod combination and rotary discharging container.

Background

In cosmetic packaging material field, plastic piston and screw rod can make the cock stem combination, and this cock stem combination can be with installing in the container body, makes the plastic piston to the inside removal of container through the screw rod rotation, and then extrudees the container outside with the material body through hollow screw rod.

In some optional use modes, after the contact end surfaces between the plastic piston and the screw rod are in interference during assembly, when the assembly machine continues to rotate the plastic piston, the meshing relationship between the plastic piston and the screw rod is destroyed, so that the material body cannot be extruded to the outside of the container body normally during use of the plug rod combination.

Disclosure of Invention

The embodiment of the application provides a plastic piston, a plug rod combination and a rotary discharging container. The technical scheme is as follows:

according to an aspect of the present application, there is provided a plastic piston comprising: the screw tooth part and the main body are annular, and the screw tooth part is arranged on the inner side of the annular structure of the main body;

the screw thread portion is made of a first material, the body is made of a second material, and the hardness of the first material is greater than that of the second material.

According to another aspect of the present application, there is provided a stopper rod assembly comprising: a plastic piston and a screw; the plastic piston comprises a screw tooth part and a main body, wherein the main body is annular, and the screw tooth part is arranged on the inner side of an annular structure of the main body; the screw thread part is made of a first material, the main body is made of a second material, and the hardness of the first material is higher than that of the second material;

the plastic piston is meshed with the screw rod through the screw tooth part, and the plastic piston is sleeved on the screw rod.

According to another aspect of the present application, there is provided a screw-type tapping container comprising: a plug stem assembly, a container body and an applicator head;

the stopper rod combination comprises: a plastic piston and a screw; the plastic piston comprises a screw tooth part and a main body, wherein the main body is annular, and the screw tooth part is arranged on the inner side of an annular structure of the main body; the screw thread part is made of a first material, the main body is made of a second material, and the hardness of the first material is higher than that of the second material; the plastic piston is meshed with the screw rod through the screw tooth part, and the plastic piston is sleeved on the screw rod;

the plug rod assembly is inserted and installed in the container body, the material body is filled in a cavity formed by the plastic piston and the container body, and the screw rod seals a container opening of the container body; the first end of the screw is provided with the smearing head, and the first end is positioned at one end outside the container body; the second end of the screw is provided with a feed inlet, and the second end is positioned at one end in the container body; the plastic piston is clamped in the container body;

the screw comprises an extension part exposed out of the container body, and the extension part is used for driving the plastic piston to rotate towards the inside of the container body in a state of rotating around the screw.

The beneficial effects of the application are as follows: the application provides a plastic piston comprising a body made of a softer material and a screw thread made of a harder material, wherein the screw thread is located inside the annular body, so that the plastic piston can be fitted to a component provided with external screw threads. Since the screw thread portion increases the hardness, the plastic piston can reduce the risk of damaging the screw thread at the time of assembly, while maintaining the air tightness by the body of the softer material. The application also provides a plug rod combination and a rotary discharging container applying the plastic piston. As the hardness of the screw tooth part in the plastic piston is enhanced, the risk of stress damage between the screw tooth part of the piston and the screw tooth of the screw rod is reduced, thereby reducing the reject ratio of the plug rod combination in industrial production and reducing the material waste.

Drawings

In order to more clearly describe the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments of the present application will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic cross-sectional view of a plastic piston according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of a plastic piston according to the embodiment shown in fig. 1.

Fig. 3 is a schematic view of a first end face of a plastic piston according to the embodiment shown in fig. 1.

Fig. 4 is an exploded view of a stopper rod assembly according to an embodiment of the present application.

Fig. 5 is an end view of a plug rod assembly provided in accordance with the embodiment of fig. 4.

Fig. 6 is a schematic view of another plug stem combination provided in accordance with the embodiment of fig. 4.

Fig. 7 is a schematic diagram of a second sub-structure provided based on the embodiment shown in fig. 6.

Fig. 8 is an exploded view of a rotary discharge container according to an embodiment of the present application.

FIG. 9 is a cross-sectional view of a swirl imparting vessel provided in accordance with the embodiment of FIG. 8.

Fig. 10 is a perspective view of a swirl outlet receptacle provided in accordance with the embodiment of fig. 8.

Wherein, the reference numerals: plastic piston 100, screw portion 120, body 140, scraper portion 160,

screw 200, extension 210, first end face 30, first substructure 31, contact end face 500, second end face 50, second substructure 51, arcuate projection 711, square projection 712, trapezoidal projection 713, rotary discharge vessel 800, vessel body 810, applicator head 820, and cover 830.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present application, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

It should be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

In the description of the embodiments of the present application, the term "corresponding" may indicate that there is a direct correspondence or an indirect correspondence between the two, or may indicate that there is an association between the two, or may indicate a relationship between the two and the indicated, configured, etc.

The following description of the terms appearing in the present application is provided for ease of understanding, as follows.

And (3) a plastic piston: the resulting piston may be formed by a plastic forming process. In the application, the plastic piston is of an annular structure with an open middle. The plastic piston comprises a screw tooth part and a main body, and the screw tooth part is arranged at the inner side of the opening.

And (3) material: refers to the cosmetic body itself, the material state of which may be fluid. In the detailed classification, the fluid may be a liquid with better fluidity or a pasty material with thicker state, and the embodiment of the present application is not limited thereto.

Alternatively, in one possible application, the material may be a more volatile substance. For example, as a material for makeup, a foundation, essence, cream, toner, or the like may be used. Among the above substances, the material may be a substance having relatively high volatility. When the material body has stronger volatility, the material body can still be filled in the rotary discharging container provided by the application, and can be normally used by users.

Alternatively, when the present application is applied to the european union, cosmetic products may be products conforming to the regulations of the european meeting (the European Parliament and of the Council, EC) in the 11/30 2009-month-30-day cosmetic-related meeting. The substances mentioned in the present application are understood as meaning cosmetics. In the present application, the cosmetic material may also be regarded as a name of cosmetics.

Plug rod combination: the novel plastic screw comprises a plastic piston and a screw rod, wherein a first screw tooth is arranged on the outer side edge of the screw rod, an opening is formed in the center of the plastic piston, and a second screw tooth is arranged in the inner side edge of the opening. The first screw teeth are meshed with the second screw teeth, so that the plastic piston is sleeved on the screw rod, and then the plug rod combination is assembled.

The plastic piston comprises a screw tooth part and a main body, wherein the main body is annular, and the screw tooth part is arranged on the inner side of an annular structure of the main body. The screw portion is made of a first material, and the body is made of a second material, the first material having a hardness greater than the second material. The plastic piston is meshed with the screw rod through the screw tooth part, and the plastic piston is sleeved on the screw rod.

Wherein the screw may also be made by a plastic molding process. The plastic Molding process may include at least one of an injection Molding process (Injection Molding) (also known as an injection Molding process), an Insert Molding process, a two-shot injection Molding process, a micro-foam injection Molding process, a nano injection Molding process (Nano Molding Technology, NMT), a blow Molding process, and an extrusion Molding process.

Smearing head: elastically deformable and permeable to liquids. The applicator head may infiltrate a cosmetic material body stored in the container body. After the applicator head wets the cosmetic body, the user may apply the cosmetic body to the user's face or other body surface. For the material of the applicator head, the applicator head may be an applicator fabric, which may be made of a woven fabric, or may be made of a non-woven fabric or another non-woven material (e.g., foam or sponge). Structurally, the applicator head may be sleeved on the first end of the screw. Optionally, the smearing head may further include a discharge port that communicates with the first end.

In another possible embodiment, the applicator head may also be a plastic applicator head or a metal applicator head. Wherein, the metal smearing head can be zinc alloy, aluminum alloy or stainless steel. The stainless steel may be a food grade steel, such as a type 316 stainless steel or a type 304 stainless steel.

Alternatively, in one possible implementation, the applicator head may be a sponge head made of sponge.

Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a plastic piston according to an embodiment of the application. In fig. 1, a plastic piston 100 includes a screw 120 and a body 140. In terms of popular relative positional relationship, the body 140 is located on the outer layer of the screw portion 120. In other words, the screw thread part 120 is located at the inner layer of the body 140.

The main body 140 is annular, and the screw portion 120 is provided inside the annular structure. The screw 120 is embedded inside the main body 140. Wherein the screw part 120 is made of a first material and the body 140 is made of a second material. At the same time, the hardness of the first material is greater than the hardness of the second material.

It should be noted that, since the plastic piston 100 is made of plastic as a whole. Thus, both the first material and the second material belong to a plastic material that can be processed by a plastic molding process.

From the viewpoint of manufacturing, the plastic piston 100 is manufactured in two ways. The first mode is a clamping assembly mode, and the second mode is a two-time injection molding mode.

In the process of the snap-fit assembly, the screw portion 120 and the main body 140 are two separate injection molded pieces. Each independent injection molding piece corresponds to a set of molds. After the two injection molding parts are manufactured, the screw portion 120 and the main body 140 are assembled into a whole by a clamping manner.

In one possible snap-fit assembly, a worker may insert the screw 120 from the hole of the body 140 such that the screw 120 snaps inside the body 140.

In another possible snap-fit assembly, the factory produces a dedicated jig. The worker uses the jig to press the screw portion 120 into the main body 140, so that the screw portion 120 and the main body 140 are assembled into one body by means of the clamping.

In the implementation of the two-shot molding, the screw 120 and the main body 140 may be a component that is obtained by two-shot molding in one mold and is fused together, that is, the plastic piston 100.

In one possible implementation, the same set of molds first injection mold the screw 120 with the first material; the body 140 is then injection molded using a second material. Alternatively, in another possible implementation, the same set of molds first injection mold the body 140 with a second material; the first material is then used to injection mold the screw 120.

In another possible implementation, the screw 120 is injection molded by a first mold. Subsequently, the injection-molded screw portion 120 is moved into a second mold, in which the body 140 is injection-molded using a second material, thereby achieving fusion of the screw portion 120 and the body 140, and molding the resulting plastic piston 100.

In another possible implementation, the body 140 is injection molded by a third mold. Subsequently, the injection molded body 140 is moved into a fourth mold in which the screw portion 120 is injection molded using the first material, thereby achieving fusion of the screw portion 120 and the body 140, and molding the plastic piston 100. In one possible designation, this molding is referred to as transfer molding or insert molding.

In summary, the plastic piston provided in the embodiment of the application includes a screw portion and a main body, wherein the screw portion is disposed at an inner side of the annular main body, the screw portion is made of a first material, and the main body is made of a second material, and the hardness of the first material is greater than that of the second material. Because the hardness of the screw tooth part is larger than that of the main body, the application can improve the strength between the screw tooth part and other engaged accessories while ensuring the air tightness of the plastic piston body through softer materials, so that the screw tooth part cannot be damaged due to overlarge assembly torque.

Referring to fig. 2, fig. 2 is a schematic cross-sectional view of a plastic piston according to the embodiment shown in fig. 1. In fig. 2, the plastic piston 100 includes a screw portion 120, a main body 140, and a scraping portion 160.

Optionally, the scraping portion 160 is disposed on a side of the screw portion 120 contacting the material body in the axial direction of the plastic piston 100.

The scraping portion 160 may be concentric circles around the axial direction of the plastic piston 100, and the number of the concentric circles may be one or more. The plane on which the concentric circles of the scraping portion 160 are located may be perpendicular to the axis of the plastic piston 100 or may be non-perpendicular to the axis of the plastic piston 100. The application is not limited in this regard.

In another possible implementation, the scraping portion 160 may also be a single turn thread, which is not limited by the embodiment of the present application.

Alternatively, the inwardly protruding flange of the scraping portion 160 may be arch-shaped, square-shaped, trapezoidal-shaped, or other irregular shape, which is not limited by the present application.

Referring to fig. 3, fig. 3 is a schematic view of a first end face of a plastic piston according to the embodiment shown in fig. 1. In fig. 3, a first substructure 31 is provided on a first end surface 30 of the plastic piston. Wherein the first substructure 31 is configured to limit a distance between the first end surface 30 and the second end surface to a predetermined threshold or more. It should be noted that the preset threshold is a preset value of the plastic piston before the plastic piston is matched with the corresponding accessory. The preset threshold value is used for ensuring that a reasonable distance is kept between the first end face 30 and the second end face of the plastic piston, and preventing the screw rod where the plastic piston and the second end face are located from being locked. That is, the second end face is the face of the screw engaged by the plastic piston that faces the first end face.

In one possible embodiment, in a plastic piston provided with a scraper, the diameter of the circle enclosed by the scraper, i.e. the inner diameter of the scraper is smaller than the outer diameter of the screw. In this design, scrape the screw thread interference on the other accessory that the material portion can be suitable with screw thread portion meshing, realize the effect of scraping the material body on the screw thread on other accessories.

Referring to fig. 4, fig. 4 is an exploded view of a stopper rod assembly according to an embodiment of the present application. In fig. 4, the stopper rod combination includes a plastic piston 100 and a screw 200. The plastic piston 100 includes a screw portion and a main body, the main body is annular, the screw portion is disposed at an inner side of an annular structure of the main body, the screw portion is made of a first material, the main body is made of a second material, and hardness of the first material is greater than that of the second material.

In fig. 4, the plastic piston 100 is engaged with the screw 200 through the screw thread part, and the plastic piston 100 is sleeved on the screw 200. Accordingly, the screw 200 is provided on the outer surface thereof with screw teeth which are engaged with the screw teeth portions.

Optionally, in fig. 4, the screw 200 includes an extension 210. In one possible embodiment, the extension 210 and the screw body can be machined in one piece as a unitary fitting. In another possible design, the extension 210 and the screw body may be machined separately, facilitating industrial production to increase production efficiency. In the industrial production, for the purpose of improving efficiency, facilitating processing, saving materials, and the like, a single component shown in the present application may be composed of a plurality of sub-components, and a plurality of components may be combined into one component for processing, which is not limited in the present application.

In summary, the plug rod assembly disclosed in the embodiment of the application includes a plastic piston and a screw rod, and the plastic piston is meshed with the screw rod through the screw tooth portion, and the piston is sleeved on the screw rod, so that the piston and the screw rod can relatively rotate, and the function of extruding the material body by the piston is further realized. The hardness of the screw tooth part is larger than that of the main body of the plastic piston, so that the plastic piston can reduce the risk of damaging the screw tooth during assembly, and the risk of stress damage between the screw tooth part of the piston and the screw tooth of the screw rod is reduced, thereby reducing the reject ratio of the plug rod combination in industrial production and reducing the material waste.

Referring to fig. 5, fig. 5 is an end view of a plug assembly according to the embodiment shown in fig. 4. In fig. 5, a contact end face 500 is used to indicate the end face of the contact between the plastic piston and the screw, which is perpendicular to the axis of the screw. In one possible embodiment, the contact end surface 500 includes a first end surface 30 and a second end surface 50, the first end surface 30 being located in the plastic piston 100 and the second end surface 50 being located in the screw body, i.e. the second end surface 50 being located in the screw 200.

Wherein the first end face 30 and the second end face 50 are disposed opposite each other. In other words, the first end face 30 and the second end face 50 are disposed face-to-face.

Referring to fig. 6, fig. 6 is a schematic view of another plug rod assembly provided based on the embodiment shown in fig. 4. In fig. 6, a second substructure 51 is disposed on the second end surface 50 of the screw 200, a first substructure 31 is disposed on the first end surface 30 of the plastic piston 100, the first end surface 30 and the second end surface 50 are disposed opposite to each other, the first substructure 31 is configured to block the second substructure 51, and the first substructure 31 is configured to limit a distance between the first end surface 30 and the second end surface 50 to be equal to or greater than a preset threshold.

Illustratively, the first end face 30 and the first substructure 31 both belong to the main body 140 of the plastic piston.

Wherein the first substructure 31 and the second substructure 51 are blocked from each other, and the hardness of the first substructure 31 is smaller than that of the second substructure 51.

It should be noted that, since the plastic piston in the plug rod assembly is engaged with the screw rod through the screw tooth, the plastic piston is assembled to the screw rod from the second end of the screw rod. The plastic piston stops precession when the plastic piston engages the screw and rotates until the first substructure and the second substructure block each other. Therefore, the first assembly mode can avoid locking caused by overlarge contact area between the screw rod and the plastic piston.

In a further manner, the first substructure and/or the second substructure are broken in case the torque force of the assembly is too great. Further, the first substructure and/or the second substructure will continue to approach towards the end face to which it faces. Alternatively, the first substructure may touch the second end surface. Alternatively, the second substructure may be in contact with the first end face.

Therefore, the scheme that the first substructure and the second substructure are blocked mutually can have at least two measures for preventing the contact area between the plastic piston and the screw rod from being too large. Meanwhile, the scraps generated by the collision of the first substructure and the second substructure can be blocked on one side far away from the material body by the plastic piston, so that the cleanness of the material body is ensured.

In one possible way, both the first end face and the second end face may be annular. If 360 degrees of the circular ring are taken as the total range of distribution. The first substructures on the first end face may be uniformly distributed and the second substructures on the second end face may be uniformly distributed.

That is, the first substructures are uniformly distributed on the first end face, and the number of the first substructures is at least two; the second substructures are uniformly distributed on the second end face, and the number of the second substructures is at least two.

For example, 2 first substructures are disposed on the first end surface, and the angle corresponding to the arc between each of the substructures is 180 °. For another example, 3 first substructures are disposed on the first end surface, and the angle corresponding to the arc between each substructures is 120 °. For another example, if 4 first sub-structures are disposed on the first end surface, the angle corresponding to the arc between each sub-structure is 90 °.

Similarly, the distribution of the second sub-structure on the second end surface may be the same as the distribution of the first sub-structure on the first end surface.

The number of the first substructures on the first end surface may be equal to the number of the second substructures on the second end surface.

In one possible manner, the number of first substructures is an even number, and/or the number of second substructures is an even number.

In summary, in the plug rod assembly provided by the present application, the first substructure is disposed on the first end surface, and the second substructure is disposed on the second end surface. Because the first substructure can be blocked with the second substructure when the first end surface is close to the second end surface, the measure of overlarge contact area between the plastic piston and the screw is avoided, and the possibility of locking between the plastic piston and the screw is reduced.

Referring to fig. 7, fig. 7 is a schematic diagram of a second sub-structure provided based on the embodiment shown in fig. 6.

In fig. 7, the shape of the second sub-structure 51 on the screw 200 may be flexibly set according to actual needs. In one possible approach, the shape of the second substructure 51 includes, but is not limited to, at least one of arcuate bumps 711, square bumps 712, and/or trapezoidal bumps 713. It should be noted that the shape of the second substructure 521 may also include other shapes, which are only schematically illustrated and not limiting.

Similarly, the shape of the first substructure includes, but is not limited to, at least one of arcuate bumps, square bumps, and/or trapezoidal bumps.

In summary, according to the plug rod combination provided by the embodiment of the application, the screw tooth part of the plastic piston is used for increasing the hardness, so that the plastic piston can reduce the risk of damaging the screw tooth during assembly, and the influence of excessive torsion during assembly resistance of the plug rod combination is improved, thereby reducing the reject ratio of the plug rod combination in industrial production and reducing the material waste.

Referring to fig. 8, fig. 8 is an exploded view of a rotary discharge container according to an embodiment of the present application. In fig. 8, the swirl outlet container 800 comprises an outer cap 830, an application head 820, an extension 210, a screw 200, a plastic piston 100 and a container body 810.

In an embodiment of the present application, a plug stem assembly includes: a plastic piston 100 and a screw 200; the plastic piston 100 comprises a screw thread part 120 and a main body 140, wherein the main body 140 is annular, and the screw thread part 120 is arranged on the inner side of the annular structure of the main body 140; the screw part 120 is made of a first material, and the body 140 is made of a second material, the first material having a hardness greater than that of the second material; the plastic piston 100 is meshed with the screw rod 200 through the screw tooth part 120, and the plastic piston 100 is sleeved on the screw rod 200.

The plug rod combination is inserted and installed in the container body 810, the material body is filled in a cavity enclosed by the plastic piston 100 and the container body 810, and the screw rod 200 seals the container opening of the container body 810; the first end of the screw 200 is provided with an application head 820, which is the end located outside the container body 810; the second end of the screw 200 is provided with a feed inlet, and the second end is one end positioned in the container body 810; the plastic piston 100 is clamped in the container body 810.

The screw 200 includes an extension portion 210 exposed outside the container body 810, and the extension portion 210 is used to drive the plastic piston 100 to rotate toward the inside of the container body 810 in a state of rotating around the screw 200.

It should be noted that the feed port may be disposed at the bottom end of the screw 200. The feed port may be directed toward the opening of the container body 810, that is, the opening formed by hollowing out the bottom surface of the screw 200.

Optionally, the screw may also be provided with a volatilization preventing structure in the first end, the volatilization preventing structure being arranged in the tubular cavity of the screw. The volatilization preventing structure can play a role of a one-way valve, so that a material body can pass through when extruding the container body; simultaneously, the material body seals a discharging channel provided by the screw when not extruding the container body. In one possible implementation, the volatilization preventing structure can be a one-way valve. As a floor implementation mode, the one-way valve can be formed by combining a ball body and a spring.

Optionally, the smearing head comprises a discharge hole communicated with the first end of the screw rod, and a convex plug is arranged on the inner side of the outer cover and used for blocking the discharge hole when the outer cover is covered on the rotary discharge container.

Referring to fig. 9, fig. 9 is a cross-sectional view of a swirl outlet receptacle provided based on the embodiment shown in fig. 8. In fig. 9, there are included an outer cap 830, an application head 820, an extension 210, a screw 200, a plastic piston 100, and a container body 810. The plastic piston 100 includes a screw portion 120 and a main body 140.

In the field of floor application, the plastic piston is screwed into the screw from the first end in the assembly stage of the rotary discharge container until the rotary torque between the plastic piston and the screw reaches a first torque threshold. It should be noted that the plastic piston and screw are separate and independent components prior to the assembly stage. In order to realize the effect that the plastic piston presses the material body from the feeding hole at the lower end of the screw rod and flows out from the smearing head when rotating downwards towards the inside of the container body in the using stage. When the rotary discharging container is assembled, the plastic piston needs to be rotated to a position, close to the screw rod, at the upper end. The plastic piston provided by the application can play a role in enhancing the strength of the screw tooth part of the plastic piston in the assembly process, so that the plastic piston is prevented from being damaged due to insufficient strength of the screw tooth part of the plastic piston when the rotating torque between the plastic piston and the screw reaches the first torque threshold. At the same time, the plastic piston is provided with air tightness by the body 140, which is soft and elastic in hardness.

Referring to fig. 10, fig. 10 is a perspective view of a rotary discharge container according to the embodiment shown in fig. 8. In fig. 10, the screw tap container includes an outer cap 830, an extension 210, and a container body 810. When the user pulls the cover 830 open, the extension 210 may be rotated so that the body is squeezed from the container body 810, and the body is applied to the user's body surface by the applicator head.

In summary, according to the rotary discharging container provided by the embodiment of the application, the risk of damage to the screw teeth of the plastic piston in the rotary discharging container can be reduced through the structure of the plastic piston designed in advance in the assembly process, so that the normal function of the rotary discharging container in use is ensured, the reject ratio of the plug rod combination in industrial production is reduced, and the material waste is reduced.

The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the description of the application, a "first feature" or "second feature" may include one or more of such features. In the description of the present application, "plurality" means two or more. In the description of the application, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween. In the description of the application, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.

The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the present application, and any modifications, equivalent substitutions, improvements, etc. that fall within the spirit and principles of the present application should be included in the scope of the present application.

Claims

1. A plastic piston, the plastic piston comprising: the screw tooth part and the main body are annular, and the screw tooth part is arranged on the inner side of the annular structure of the main body;

2. The plastic piston of claim 1, wherein the screw portion and the main body are assembled into one body by means of a snap fit, or wherein the screw portion and the main body are manufactured into one body by means of two-shot injection.

3. The plastic piston of claim 2, further comprising a scraping portion disposed on a side of the screw portion contacting the body in an axial direction of the plastic piston.

4. A plastic piston according to claim 3, wherein a first substructure is provided on a first end face of the plastic piston, the first substructure being adapted to limit a distance between the first end face and a second end face, which is a face of a screw on which the plastic piston is engaged, facing the first end face, to a predetermined threshold value or more.

5. A plastic piston according to claim 3, wherein the inner diameter of the scraping portion is smaller than the outer diameter of the screw portion.

6. A plug stem assembly, the plug stem assembly comprising: a plastic piston and a screw; the plastic piston comprises a screw tooth part and a main body, wherein the main body is annular, and the screw tooth part is arranged on the inner side of an annular structure of the main body; the screw thread part is made of a first material, the main body is made of a second material, and the hardness of the first material is higher than that of the second material;

7. The plug stem assembly of claim 6, wherein a second substructure is disposed on the second end face of the screw, a first substructure is disposed on the first end face of the plastic piston, the first end face and the second end face are disposed opposite to each other, the first substructure is configured to block the second substructure, and the first substructure is configured to limit a distance between the first end face and the second end face to be greater than or equal to a preset threshold.

8. A swirl outlet receptacle, the swirl outlet receptacle comprising: a plug stem assembly, a container body and an applicator head;

9. The rotating discharge container of claim 8, wherein the screw is provided with a volatilization preventing structure in the first end, the volatilization preventing structure being disposed in a tubular cavity of the screw.

10. The swirl outlet receptacle of claim 8 or 9 further comprising an outer cap, the applicator head comprising a discharge port in communication with the first end, a male plug being provided on the inside of the outer cap for plugging the discharge port when the outer cap is capped onto the swirl outlet receptacle.