Anti-locking plug rod combination and spin-out container

Abstract

The application discloses a lock-preventing plug rod combination and a rotary discharging container, and belongs to the field of cosmetic packaging materials. The lock-preventing plug rod combination comprises a piston, a screw rod and a lock-preventing structure. The piston is connected with the screw rod through screw threads, and the piston is sleeved on the screw rod. Therefore, the piston can rotate relative to the screw rod, and the function of the piston extruding a material body is realized. The lock-preventing structure is used for controlling the contact area S1 between the piston and the screw rod to be less than the projection area S2. The projection area S2 is used for indicating the projection area of the contact end surface between the piston and the screw rod on a reference plane. The reference plane is perpendicular to the axis of the screw rod. The application reduces the contact area between the piston and the screw rod, avoids the locking problem between the piston and the screw rod during assembly of the plug rod combination, reduces the defective rate of the plug rod combination in industrial production, and reduces material waste.

Description

Technical Field

[0001] This application relates to the field of cosmetic packaging materials, and in particular to an anti-locking stopper assembly and a rotating discharge container. Background Technology

[0002] In the field of cosmetic packaging, pistons and screws can be made into piston-screw assemblies. These assemblies can be installed in containers, and the rotation of the screw causes the piston to move into the contents of the container, thereby extruding the material through the hollow screw to the outside of the container.

[0003] In some alternative applications, during assembly, interference occurs between the piston and screw contact surfaces, making proper separation difficult. This results in the piston-rod assembly failing to provide normal material discharge. Summary of the Invention

[0004] This application provides an anti-locking stopper rod assembly and a rotating discharge container. The technical solution is as follows:

[0005] According to one aspect of this application, an anti-locking plug rod assembly is provided, the anti-locking plug rod assembly comprising: a piston, a screw, and an anti-locking structure;

[0006] The piston engages with the screw via threads, and the piston is sleeved on the screw.

[0007] The anti-lock structure is used to control the contact area S1 between the piston and the screw to be less than the projected area S2. The projected area S2 is used to indicate the projected area of ​​the contact end face between the piston and the screw on the reference plane, which is perpendicular to the axis of the screw.

[0008] The anti-lock structure is disposed on the piston, and / or the anti-lock structure is disposed on the screw.

[0009] According to another aspect of this application, a rotary dispensing container is provided, the rotary dispensing container comprising: an anti-locking plug assembly, a container body, and an applicator head;

[0010] The anti-locking piston assembly includes: a piston, a screw, and an anti-locking structure; the screw is a hollow tube; the piston engages with the screw via threads, and the piston is sleeved on the screw; the anti-locking structure is used to control the contact area S1 between the piston and the screw to be less than the projected area S2, the projected area S2 is used to indicate the projected area of ​​the contact end face between the piston and the screw on a reference plane, the reference plane being perpendicular to the axis of the screw; the anti-locking structure is disposed on the piston, and / or, the anti-locking structure is disposed on the screw;

[0011] The anti-locking plug rod assembly is inserted and installed in the container body. The material is filled into the cavity formed by the opposite face of the piston relative to the contact end face and the container body, and the screw seals the container opening of the container body. The first end of the screw is equipped with the applicator head, and the first end is located outside the container body. The second end of the screw is provided with a feed port, and the second end is located inside the container body. The piston is engaged in the container body.

[0012] The screw includes an extension exposed outside the container body, the extension being used to drive the piston to rotate into the container body while rotating about the screw.

[0013] The beneficial effects of the technical solutions provided in this application embodiment may include:

[0014] The anti-locking plug rod assembly provided in this application includes a piston, a screw, and an anti-locking structure. Since the piston engages with the screw via threads and is sleeved on the screw, relative rotation between the piston and the screw is possible, thereby enabling the piston to compress the material. The anti-locking structure controls the contact area S1 between the piston and the screw to be less than the projected area S2. The projected area S2 indicates the projected area of ​​the contact end faces between the piston and the screw on a reference plane perpendicular to the screw's axis. This application reduces the contact area between the piston and the screw, thus preventing locking-up during assembly and reducing the defect rate of the plug rod assembly in industrial production, thereby reducing material waste. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an exploded view of the anti-locking plug rod assembly provided in an embodiment of this application.

[0017] Figure 2 Based on Figure 1 The illustrated embodiment provides a schematic diagram of the end face of a plug rod assembly.

[0018] Figure 3 Based on Figure 1 The illustrated embodiment provides a schematic diagram of an anti-lock-up structure configuration.

[0019] Figure 4 Based on Figure 1 The illustrated embodiment provides a schematic diagram of another method for setting up an anti-lock-up structure.

[0020] Figure 5 Based on Figure 1 A schematic diagram of the second substructure provided in the illustrated embodiment.

[0021] Figure 6 This is a schematic diagram of another plug rod assembly provided in an embodiment of this application.

[0022] Figure 7 This is an exploded view of the structure of a rotating discharge container provided in an embodiment of this application.

[0023] Figure 8 Based on Figure 7 A cross-sectional view of the rotating discharge container provided in the illustrated embodiment.

[0024] Figure 9 Based on Figure 7 The illustrated embodiment provides a perspective view of a rotating discharge container.

[0025] In the attached drawings, the following reference numerals are used: screw 110, anti-lock structure 120, piston 130, extension part 112, feed port 114, contact end face 200, first end face 210, second end face 220, second substructure 310, first substructure 410, arched protrusion 511, square protrusion 512, trapezoidal protrusion 513, rotating discharge container 700, container body 710, application head 720, and outer cover 730. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0027] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0028] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0029] It should be understood that the term "instruction" mentioned in the embodiments of this application can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0030] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0031] For ease of understanding, the terminology used in this application is explained below, for details.

[0032] Material: refers to the cosmetic material itself, which can be in a fluid state. In detailed classification, a fluid can be a liquid with good flowability or a viscous paste-like substance; this application does not limit this.

[0033] Optionally, when this application is applied in Europe, the cosmetic product may be one that complies with the provisions of the European Parliament and of the Council (EC) in its Parliamentary Resolution on Cosmetics of 30 November 2009.

[0034] The piston-rod assembly includes a piston and a screw. The outer edge of the screw has a first thread, and the piston has an opening in the center with a second thread on the inner edge of the opening. The first and second threads mesh, allowing the piston to be fitted onto the screw, thus forming the piston-rod assembly.

[0035] Anti-lock piston rod assembly: Based on the piston rod assembly mentioned in this application, an anti-lock structure is added. It should be noted that the anti-lock structure can be part of the piston, and / or, the anti-lock structure can also be part of the screw.

[0036] When the anti-lock mechanism is part of the piston, both the anti-lock mechanism and the piston can be obtained through injection molding. Similarly, when the anti-lock mechanism is part of the screw, both the anti-lock mechanism and the screw can be obtained through plastic molding.

[0037] It should be noted that plastic molding processes can include at least one of the following: injection molding, insert molding, two-color injection molding, micro-foaming injection molding, nano-molding technology (NMT), blow molding, and extrusion molding.

[0038] Application head: Elastically deformable and permeable to liquids. The application head can be soaked in the cosmetic product stored in the container. After the application head is soaked in the cosmetic product, the user can apply the cosmetic product to the user's face or other body parts. Regarding the material of the application head, it can be an application fabric, which can be made of woven fabric, non-woven fabric, or another non-woven material (such as foam or sponge).

[0039] In another possible implementation, the applicator head can be a plastic applicator head or a metal applicator head. The metal applicator head can be made of zinc alloy, aluminum alloy, or stainless steel, etc. It should be noted that the stainless steel can be food-grade steel, such as 316 or 304 stainless steel.

[0040] Alternatively, in one possible implementation, the applicator head can be a sponge head made of sponge.

[0041] Please see Figure 1 , Figure 1 This is an exploded view of the structure of an anti-locking plug rod assembly provided in an embodiment of this application. Figure 1 In the process, the anti-locking piston rod assembly includes a piston 130, a screw 110, and an anti-locking structure 120.

[0042] exist Figure 1In this configuration, piston 130 engages with screw 110 via threads, and piston 130 is sleeved on screw 110; anti-lock structure 120 is used to control the contact area S1 between piston 130 and screw 110 to be less than the projected area S2, and the projected area S2 is used to indicate the projected area of ​​the contact end face between piston 130 and screw 110 on a reference plane, the reference plane being perpendicular to the axis of screw 110; anti-lock structure 120 is disposed on piston 130, and / or anti-lock structure 120 is disposed on screw 110.

[0043] Optionally, the applicant discovered in practical applications that when the contact area between the piston 130 and the screw 110 reaches S2, the probability of lock-up between the piston 130 and the screw 110 increases significantly. Therefore, the solution proposed in this application was designed to address this technical problem.

[0044] It should be noted that, Figure 1 The following explanation uses the example of the anti-locking structure 120 being installed on the screw 110. Figure 1 The above description is for illustrative purposes only and does not limit the anti-lock structure 120 to be disposed on the screw 110 and simultaneously disposed on the piston 130; at the same time, this application does not limit the anti-lock structure 120 to be disposed only on the piston 130.

[0045] It should be noted that, in Figure 1 In this design, the screw 110 includes an extension portion 112. In one possible design, the extension portion 112 and the screw body can be combined into a single, integral component for machining. In another possible design, the extension portion 112 and the screw body can be machined separately, facilitating industrial production and improving efficiency. It should be noted that in industrial production, for purposes such as improving efficiency, facilitating machining, or saving materials, the single component shown in this application can be composed of multiple sub-components, and multiple components can also be combined into a single component for machining; this application does not limit this.

[0046] Optionally, the elastic material of the piston 130 may include at least one of nitrile butadiene rubber (NBR), polyurethane rubber, natural rubber, elastomers, and silicone resins. Alternatively, the elastic material may also be formed from at least one of polypropylene, polyethylene, acrylonitrile-butadiene-styrene (ABS), and thermoplastic elastomers (TPE). It should be noted that the material of the piston 130 is not limited in this application embodiment; the piston 130 can be formed from various materials to create a component with elastic properties.

[0047] In summary, the anti-locking plug rod assembly disclosed in this application includes a piston, a screw, and an anti-locking structure. Since the piston engages with the screw via threads and is sleeved on the screw, relative rotation between the piston and the screw is possible, thereby enabling the piston to compress the material. Specifically, the anti-locking structure controls the contact area S1 between the piston and the screw to be less than the projected area S2, and the projected area S2 indicates the projected area of ​​the contact end faces between the piston and the screw on a reference plane perpendicular to the screw's axis. This application reduces the contact area between the piston and the screw, thus preventing the piston and screw from locking up during assembly, thereby reducing the defect rate of the plug rod assembly in industrial production and minimizing material waste.

[0048] Please see Figure 2 , Figure 2 Based on Figure 1 The illustrated embodiment provides a schematic diagram of the end face of a plug rod assembly. Figure 2 In this embodiment, the contact end face 200 is used to indicate the end face of contact between the piston and the screw, and the contact end face is perpendicular to the axis of the screw. In one possible embodiment, the contact end face 200 includes a first end face 210 and a second end face 220, the first end face 210 being located in the piston 130 and the second end face 220 being located in the screw body, that is, the second end face 220 being located in the screw 110.

[0049] The first end face 210 and the second end face 220 are arranged facing each other. In other words, the first end face 210 and the second end face 220 are arranged face to face.

[0050] In one possible implementation, when the anti-lock structure 120 is disposed on the piston 130, the anti-lock structure 120 extends on the first end face 210 and in the direction of the second end face 220.

[0051] In another possible implementation, the anti-locking structure 120 is provided on the screw 110. Figure 2 In the case of the anti-locking structure 120 being installed on the screw body as an example, the anti-locking structure 120 extends on the second end face 220 and in the direction of the first end face 210.

[0052] It should be noted that, since the anti-lock structure can be set on the second end face of the screw, the first end face of the piston, or both the screw and the piston, the position of the anti-lock structure can be flexibly set, and excessive contact between the screw and the piston can be avoided through the anti-lock structure.

[0053] Please see Figure 3 , Figure 3 Based on Figure 1The illustrated embodiment provides a schematic diagram of an anti-lock-up structure configuration.

[0054] exist Figure 3 In the piston rod assembly, an anti-locking structure is provided on the second end face 220 of the screw body. This anti-locking structure is interference-fitted with the first end face 210.

[0055] In this scenario, the anti-lock structure includes a second substructure 310. The second substructure 310, located on the second end face 220, is interference-fitted with the first end face 210, and the hardness of the first end face 210 is less than the hardness of the second substructure.

[0056] Please see Figure 4 , Figure 4 Based on Figure 1 The illustrated embodiment provides a schematic diagram of another method for setting up an anti-lock-up structure.

[0057] exist Figure 4 In the piston rod assembly, an anti-lock-up structure is provided on the first end face 210 of the piston 130. This anti-lock-up structure is interference-fitted with the second end face 220.

[0058] In this scenario, the anti-lock structure includes a first substructure 410. The first substructure 410, which is disposed on the first end face 210, is interference-fitted with the second end face 220, and the hardness of the first substructure 410 is less than the hardness of the second end face 220.

[0059] Please see Figure 5 , Figure 5 Based on Figure 1 A schematic diagram of the second substructure provided in the illustrated embodiment.

[0060] exist Figure 5 In this design, the shape of the second substructure 310 located on the screw can be flexibly configured according to actual needs. In one possible embodiment, the shape of the second substructure 310 includes, but is not limited to, at least one of an arched protrusion 511, a square protrusion 512, and / or a trapezoidal protrusion 513. It should be noted that the shape of the second substructure 310 may also include other shapes; the shapes described above are merely illustrative and do not constitute a limitation.

[0061] Similarly, the shape of the first substructure includes, but is not limited to, at least one of arched bumps, square bumps, and / or trapezoidal bumps.

[0062] In summary, the piston-screw assembly provided in this application, by flexibly setting the position of the anti-lock-up structure, can prevent the piston and screw from locking up due to excessive engagement in various application scenarios. Therefore, the piston-screw assembly provided in this application can reduce the probability of piston and screw locking up during assembly due to an excessively long piston rotation stroke.

[0063] Please see Figure 6 , Figure 6 This is a schematic diagram of another plug rod assembly provided in an embodiment of this application. Figure 6 In the anti-lock structure, there are a first substructure 410 and a second substructure 310, wherein the first substructure 410 is disposed on the piston 130 and the second substructure 310 is disposed on the screw 110. The anti-lock structure controls the contact area between the piston and the screw in the following three combinations of arrangements.

[0064] Method 1: The first substructure and the second substructure block each other, and the hardness of the first substructure is less than that of the second substructure.

[0065] It should be noted that, since the piston in the piston-rod assembly engages with the screw via threads, the piston is assembled onto the screw from the second end of the screw. When the piston engages with the screw and rotates until the first and second substructures block each other, the piston stops rotating. Therefore, the assembly method provided by Method 1 can avoid lock-up caused by excessive contact area between the screw and piston.

[0066] In a further embodiment, if the transfer force is too great, the first substructure and / or the second substructure may break. Consequently, the first substructure and / or the second substructure will continue to approach the end face they are facing. Optionally, the first substructure may come into contact with the second end face. Optionally, the second substructure may come into contact with the first end face.

[0067] Therefore, the mutual blocking scheme between the first and second substructures provided in this application provides at least two measures to prevent the contact area between the piston and the screw from becoming too large. Simultaneously, debris that may be generated by the collision between the first and second substructures is blocked by the piston and kept away from the material, ensuring the cleanliness of the material.

[0068] Method 2: The first substructure is interference-fitted with the second end face, and the hardness of the first substructure is less than the hardness of the second end face.

[0069] The assembly method provided in Method Two allows the first substructure to contact the second end face first. In this case, due to the presence of the first substructure, excessive contact between the piston and screw end faces is avoided. Since a second substructure is also provided on the second end face, if the piston and screw continue to rotate, the second substructure can also block the first substructure.

[0070] Therefore, the assembly scheme provided in this application also has at least two measures to prevent the contact area between the piston and the screw from being too large, further reducing the possibility of the piston and the screw locking up.

[0071] Method 3: The first end face is interference-fitted with the second substructure, and the hardness of the first end face is less than that of the second substructure.

[0072] The assembly method provided in Method 3 allows the second substructure to contact the first end face first. At this point, due to the presence of the second substructure, excessive contact between the piston and screw end faces is avoided. Since the first substructure is also provided on the first end face, if the piston and screw continue to rotate, the first substructure can also block the second substructure.

[0073] Therefore, the assembly scheme provided in this application also has at least two measures to prevent the contact area between the piston and the screw from being too large, further reducing the possibility of the piston and the screw locking up.

[0074] In one possible configuration, both the first and second end faces can be annular. If the total distribution area is considered to be 360° of the annulus, then the first substructure on the first end face can be evenly distributed, and the second substructure on the second end face can also be evenly distributed.

[0075] That is, the first substructure is evenly distributed on the first end face, and the number of the first substructure is at least two; the second substructure is evenly distributed on the second end face, and the number of the second substructure is at least two.

[0076] For example, if two first substructures are set on the first end face, the angle corresponding to the arc between each substructure is 180°. As another example, if three first substructures are set on the first end face, the angle corresponding to the arc between each substructure is 120°. And as yet another example, if four first substructures are set on the first end face, the angle corresponding to the arc between each substructure is 90°.

[0077] Similarly, the distribution rule of the second substructure on the second end face can be the same as the distribution of the first substructure on the first end face.

[0078] It should be noted that the number of first substructures on the first end face can be equal to the number of second substructures on the second end face.

[0079] In one possible manner, the number of the first substructure is even, and / or the number of the second substructure is even.

[0080] In summary, the piston-screw assembly provided in this application has a first substructure on the first end face and a second substructure on the second end face. Because the first substructure can block the second substructure when the first end face approaches the second end face, this avoids excessive contact area between the piston and screw, reducing the possibility of lock-up between the piston and screw.

[0081] Please see Figure 7 , Figure 7 This is an exploded view of the structure of a rotating discharge container provided in an embodiment of this application. Figure 7 The rotating discharge container 700 includes an outer cover 730, an applicator head 720, an extension section 112, a screw 110, a piston 130, and a container body 710.

[0082] In this embodiment, the anti-locking plug assembly includes a piston 130, a screw 110, and an anti-locking structure 120; the screw 110 is a hollow tubular shape; the piston 130 engages with the screw 110 via threads, and the piston 130 is sleeved on the screw 110; the anti-locking structure 120 is used to control the contact area S1 between the piston 130 and the screw 110 to be less than the projected area S2, the projected area S2 is used to indicate the projected area of ​​the contact end face between the piston 130 and the screw 110 on a reference plane, the reference plane being perpendicular to the axis of the screw 110; the anti-locking structure 120 is disposed on the piston 130, and / or, the anti-locking structure 120 is disposed on the screw 110.

[0083] The anti-locking plug rod assembly is inserted and installed in the container body 710. The material is filled into the cavity formed by the opposite side of the piston 130 relative to the contact end face and the container body 710, and the screw 110 seals the container opening of the container body 710. The first end of the screw 110 is equipped with an applicator head 720, which is located outside the container body 710. The second end of the screw 110 is provided with a feed port 114, which is located inside the container body. The piston 130 is engaged in the container body 710.

[0084] The screw 110 includes an extension 112 exposed outside the container body, which drives the piston 130 to rotate into the container body 710 when rotating about the screw.

[0085] Please see Figure 8 , Figure 8 Based on Figure 7 A cross-sectional view of the rotating discharge container provided in the illustrated embodiment. Figure 8 The container includes an outer cover 730, an applicator head 720, an extension part 112, a screw 110, a piston 130, and a container body 710.

[0086] Optionally, an anti-lock structure 120 is provided between the contact end faces of the piston 130 and the screw 110. A feed port 114 is provided at one end of the screw 110 located in the container body 710.

[0087] In practical applications, the piston is screwed into the screw from the first end during the assembly stage of the rotating discharge container until the anti-locking structure takes effect. It should be noted that the piston and screw are separate, independent components before assembly. To achieve the effect of forcing the material into the feed hole at the lower end of the screw and out of the applicator head as the piston rotates downwards into the container, the piston needs to be rotated to the upper position near the screw during assembly. The anti-locking structure 120 provided in this application provides this blocking effect during the assembly process.

[0088] Please refer to Figure 9 , Figure 9 Based on Figure 7 The illustrated embodiment provides a perspective view of a rotating discharge container. Figure 9 In this device, the rotating dispensing container includes an outer cover 730, an extension portion 112, and a container body 710. When the user removes the outer cover 730, the extension portion 112 can be rotated to squeeze the material out of the container body 710 to wet the application head, thus facilitating user use.

[0089] In summary, the rotary discharge container provided in this application embodiment can prevent the stopper rod assembly in the rotary discharge container from locking up during the assembly process through a pre-designed anti-locking structure, thereby ensuring the normal function of the rotary discharge container during use, and further reducing the defect rate of the stopper rod assembly in industrial production and reducing material waste.

[0090] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0091] In the description of this 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., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0092] In the description of this application, "first feature" and "second feature" may include one or more of the features. In the description of this application, "multiple" means two or more. In the description of this application, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this application, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0094] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

[0095] The above description is merely an exemplary embodiment that can be implemented in this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A locking-proof plug rod assembly, characterized in that, The anti-locking plug assembly includes: a piston, a screw, and an anti-locking structure; The piston engages with the screw via threads, and the piston is sleeved on the screw. The anti-lock structure is used to control the contact area S1 between the piston and the screw to be less than the projected area S2. The projected area S2 is used to indicate the projected area of ​​the contact end face between the piston and the screw on the reference plane, which is perpendicular to the axis of the screw. The anti-lock structure is disposed on the piston, and / or the anti-lock structure is disposed on the screw; The contact end face includes a first end face and a second end face, the first end face is located on the piston, the second end face is located on the screw, and the first end face and the second end face are arranged facing each other; When the anti-lock structure is provided on the piston, the anti-lock structure is provided on the first end face and extends in the direction of the second end face; When the anti-locking structure is provided on the screw, the anti-locking structure is provided on the second end face and extends in the direction of the first end face; When the anti-lock structure is disposed on the piston, or when the anti-lock structure is disposed on the screw, the anti-lock structure performs its blocking function in the following ways: The anti-locking structure includes a first substructure, which is disposed on the first end face and is interference-fitted with the second end face. The hardness of the first substructure is less than the hardness of the second end face. or, The anti-locking structure includes a second substructure, wherein the first end face is interference-fitted with the second substructure disposed on the second end face, and the hardness of the first end face is less than the hardness of the second substructure. The anti-lock structure includes at least one of the first substructure and the second substructure; The shape of the first substructure includes at least one of arched protrusions, square protrusions, and / or trapezoidal protrusions; The shape of the second substructure includes at least one of arched protrusions, square protrusions, and / or trapezoidal protrusions.

2. The anti-locking plug assembly according to claim 1, characterized in that, The anti-lock structure includes a first substructure and a second substructure. When the first substructure is disposed on the piston and the second substructure is disposed on the screw, the anti-lock structure controls the contact area between the piston and the screw in the following ways: The first substructure and the second substructure block each other, and the hardness of the first substructure is less than that of the second substructure; And / or, The first substructure is interference-fitted with the second end face, and the hardness of the first substructure is less than the hardness of the second end face; And / or, The first end face is interference-fitted with the second substructure, and the hardness of the first end face is less than the hardness of the second substructure.

3. The anti-locking plug assembly according to claim 2, characterized in that, The first substructure is evenly distributed on the first end face, and the number of the first substructure is at least two. And / or, The second substructure is evenly distributed on the second end face, and the number of the second substructure is at least two.

4. The anti-locking plug assembly according to claim 3, characterized in that, The number of the first substructure is even, and / or the number of the second substructure is even.

5. The anti-locking plug assembly according to claim 4, characterized in that, The number of the first substructure is equal to the number of the second substructure.

6. A rotating discharge container, characterized in that, The rotating discharge container includes: the anti-locking plug assembly, the container body, and the applicator head as described in any one of claims 1-5; The anti-locking piston assembly includes: a piston, a screw, and an anti-locking structure; the screw is a hollow tube; the piston engages with the screw via threads, and the piston is sleeved on the screw; the anti-locking structure is used to control the contact area S1 between the piston and the screw to be less than the projected area S2, the projected area S2 is used to indicate the projected area of ​​the contact end face between the piston and the screw on a reference plane, the reference plane being perpendicular to the axis of the screw; the anti-locking structure is disposed on the piston, and / or, the anti-locking structure is disposed on the screw; The anti-locking plug rod assembly is inserted and installed in the container body. The material is filled into the cavity formed by the opposite face of the piston relative to the contact end face and the container body, and the screw seals the container opening of the container body. The first end of the screw is equipped with the applicator head, and the first end is located outside the container body. The second end of the screw is provided with a feed port, and the second end is located inside the container body. The piston is engaged in the container body. The screw includes an extension exposed outside the container body, the extension being used to drive the piston to rotate into the container body while rotating about the screw.

7. The rotating discharge container according to claim 6, characterized in that, The piston is screwed into the screw from the first end during the assembly stage of the rotating discharge container until the anti-locking structure plays a blocking role.

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