Piston for medium container

Abstract

The utility model relates to the field of material containers, and particularly discloses a piston for a medium container, the piston comprises a piston body and a sealing sleeve, the sealing sleeve is cylindrical and sleeves the peripheral side of the piston body, the sealing sleeve can have an elastic deformation characteristic, one end of a sealing sleeve-shaped structure is attached to the peripheral side of the piston body to form dense connection, and the other end of the sealing sleeve-shaped structure is connected with the piston body. And the whole outer side wall of the sealing sleeve continuously and elastically abuts against the inner wall of the container to form sealing, so that the paste medium is prevented from freely flowing in the container. The device has the advantages of being simple in structure and convenient to implement.

Description

Technical Field

[0001] The present application relates to the field of material containers, and in particular to a piston for a medium container. Background Art

[0002] As living standards improve, demand for daily care products such as toothpaste, hand cream, sunscreen, and ointments is also increasing. These products are mostly semi-solid liquids, often referred to as pastes or ointments. Currently, pastes are typically packaged in soft tubes with a dispensing port at one end and a fishtail-shaped packaging structure at the other. By squeezing the tube, the paste is squeezed out of the dispensing port for use. However, as daily use of the paste decreases, squeezing out the remaining paste becomes increasingly cumbersome.

[0003] In the related technology, a piston is slidably set in the container and kept sealed with the inner wall of the container. An air pump, air bag, etc., or a container made of flexible material is directly squeezed to form a pressure difference on both sides of the piston, driving the piston to move toward the paste outlet to squeeze out the paste medium in the container. The piston can keep the paste medium close to the paste outlet of the container, preventing the paste medium from flowing arbitrarily in the container, thereby improving the convenience of subsequent use.

[0004] However, it is difficult to simultaneously take into account the smoothness of the piston's sliding and the sealing between the piston and the container. Increasing the tightness between the piston and the container will affect the movement of the piston in the container, making it inconvenient to squeeze out the paste medium; while considering the smoothness of the piston will affect the sealing effect of the piston, which may cause the paste medium to leak from the gap between the piston and the inner wall of the container. Utility Model Content

[0005] In order to improve the sealing and smooth sliding of the piston, the present application provides a piston for a medium container, which can maintain continuous elastic abutment with the inner wall of the container, has good sealing performance, does not affect the sliding of the piston, and has the advantages of simple structure and easy implementation.

[0006] The present application provides a piston for a medium container adopting the following technical solution:

[0007] A piston for a medium container comprises a plug body and a sealing sleeve. The sealing sleeve is arranged around the plug body and seals against the inner wall of the container. One end of the sealing sleeve is connected to the plug body, and the other end extends toward a paste outlet of the container.

[0008] By adopting the above technical solution, sealing sleeves with different extension lengths are configured according to the characteristics of the paste medium. For paste media that are easier to flow, a longer sealing sleeve can be configured to form a larger sealing surface to ensure the sealing effect.

[0009] Optionally, a gap is formed between the sealing sleeve and the plug body, and the sealing sleeve has elastic deformation characteristics.

[0010] By adopting the above technical solution, during the movement of the piston, the sealing sleeve can continue to maintain contact with the inner wall of the container, avoiding the formation of gaps and improving the sealing effect. The elastic resistance will not excessively affect the overall sliding of the piston, thereby ensuring the smoothness of the piston movement.

[0011] Optionally, the sealing sleeve gradually expands toward the paste outlet.

[0012] By adopting the above technical solution, the sealing sleeve has a tendency to expand outward, thereby enabling the sealing sleeve to fit more stably against the inner wall of the container, further improving the sealing effect.

[0013] Optionally, the plug body has elastic deformation characteristics, and a gas gathering groove is opened on the side of the plug body away from the paste outlet, the opening of the gas gathering groove faces away from the paste outlet, and the bottom of the groove is located at the part of the plug body close to the paste outlet.

[0014] By adopting the above technical solution, when the gas applies pressure to the inner wall of the gas gathering tank, on the one hand, it pushes the piston to move as a whole, and on the other hand, it can cause the plug body to expand outward to improve the fit between the sealing sleeve and the inner wall of the container, further improving the sealing effect and reducing the possibility of leakage of the paste medium.

[0015] Optionally, the piston further includes a connecting ring, which is an annular structure and forms two inner and outer annular connecting ends. The annular connecting end located on the inner ring is attached to the plug body, and the annular connecting end located on the outer ring is attached to the sealing sleeve.

[0016] By adopting the above technical solution, the deformation space of the sealing sleeve is increased by utilizing the connecting ring, and the fitting effect between the sealing sleeve and the inner wall of the container is further improved.

[0017] Optionally, the connecting ring has elastic deformation characteristics.

[0018] By adopting the above technical solution, when the elastic container is squeezed and deformed, the distance between the two annular connecting ends of the connecting ring located at the inner ring and the outer ring is reduced. At the same time, by virtue of its own elastic force, it provides certain support for the sealing sleeve, further improving the overall deformation ability of the piston and improving the sealing effect of the sealing sleeve.

[0019] Optionally, the plug body, connecting ring and sealing sleeve are an integrally formed structure.

[0020] By adopting the above technical solution, the one-piece molding structure is easy to process, the cost can be reduced, and the coordination effect among the three can be improved.

[0021] Optionally, the outer wall of the plug body near the paste outlet is adapted in shape to the inner wall of the container at the paste outlet.

[0022] By adopting the above technical solution, when the paste medium in the container is almost gone, the piston continues to slide toward the paste outlet and gradually fits against the inner wall of the container to more thoroughly squeeze out the paste medium in the medium cavity and reduce residue.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. During the movement of the piston, the sealing sleeve can continuously maintain contact with the inner wall of the container, avoiding the formation of gaps and improving the sealing effect. The elastic resistance will not excessively affect the sliding of the piston as a whole, thus ensuring the smooth movement of the piston.

[0025] 2. The sealing sleeve has a tendency to expand outward, which enables the sealing sleeve to fit more stably against the inner wall of the container, further improving the sealing effect;

[0026] 3. The connecting ring provides a certain support for the sealing sleeve by virtue of its own elastic force, further improving the overall deformation capacity of the piston and improving the sealing effect of the sealing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a piston located in a container according to an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 3 It is a cross-sectional view of an embodiment of the present application.

[0030] Figure numerals: 00, container; 1, plug body; 2, sealing sleeve; 3, connecting ring; 4, gas gathering groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application embodiment discloses a piston for a medium container, referring to Figure 1 and Figure 2 , including a plug body 1 and a sealing sleeve 2. The sealing sleeve 2 is cylindrical and is sleeved on the side of the plug body 1. One end of the cylindrical structure of the sealing sleeve 2 is attached to the side of the plug body 1 to form a dense connection, and the other end extends toward the direction close to the paste outlet. The entire outer wall of the sealing sleeve 2 continuously fits the inner wall of the container 00 to form a seal to prevent the paste medium from flowing arbitrarily in the container 00.

[0033] During specific implementation, sealing sleeves 2 with different extension lengths can be configured according to the characteristics of the paste medium. For paste media that are easier to flow, a longer sealing sleeve 2 can be configured to form a larger sealing surface to ensure the sealing effect. However, the present invention is not limited to the size or thickness of the sealing sleeve 2.

[0034] Further, refer to Figure 1 and Figure 3 The plug body 1 can be gradually contracted in the direction close to the paste outlet, thereby forming a certain gap between the plug body 1 and the sealing sleeve 2. At the same time, the sealing sleeve 2 can have elastic deformation characteristics (elastic deformation means that under the action of external force, the object is deformed, and when the external force is removed, the object can return to its original shape). The sealing sleeve 2 maintains elastic contact with the inner wall of the container 00 to form a sealing surface.

[0035] During the movement of the piston, the sealing sleeve 2 can continue to maintain contact with the inner wall of the container 00, avoiding the formation of gaps and improving the sealing effect. The elastic resistance will not excessively affect the overall sliding of the piston, thereby ensuring the smoothness of the piston movement.

[0036] It should be noted that in the rigid container 00, it is relatively easy to maintain a stable seal between the piston and the inner wall of the rigid container 00. However, the elastic container 00 will deform during squeezing, and a gap may easily appear between the piston and the elastic container 00, resulting in leakage of the paste medium or even inability to extrude the paste medium. Therefore, it is more difficult to maintain a seal between the elastic container 00 and the piston. The following mainly uses the elastic container 00 as an example for explanation.

[0037] The piston of the present invention can be applied to a rigid container 00 or an elastic container 00. When applied to a rigid container 00, the sealing sleeve 2 contacts the inner wall of the rigid container 00 and maintains a seal; when applied to an elastic container 00, the container 00 will undergo some deformation when squeezed, and the elastic sealing sleeve 2 can deform accordingly to maintain contact with the inner wall of the container 00 and improve the sealing effect; however, the present invention is not limited to the material, size and shape of the container 00 to which the piston is applied.

[0038] Further, refer to Figure 3 The sealing sleeve 2 may have a gradually expanding structure toward the paste outlet. Since the sealing sleeve 2 is elastic, when the sealing sleeve 2 is placed in the container 00, the inner wall of the container 00 compresses the sealing sleeve 2. At this time, the sealing sleeve 2 has a tendency to expand outward, thereby enabling the sealing sleeve 2 to fit more stably against the inner wall of the container 00, further improving the sealing effect.

[0039] Reference Figure 2 and Figure 3The plug body 1 may have elastic deformation characteristics, and a gas gathering groove 4 is opened on the side of the plug body 1 away from the paste outlet. The gas gathering groove 4 faces away from the paste outlet, and the bottom of the groove is located at the part of the plug body 1 close to the paste outlet, so that the plug body 1 presents a nearly bowl-shaped structure;

[0040] When a pressure differential develops across the piston, the piston slides within container 00, and the elastic container 00 deforms. This is when the paste is most likely to leak. Due to the pressure differential, the gas exerts pressure on the inner wall of gas collection groove 4, which not only propels the piston as a whole but also causes plug body 1 to expand outward, improving the fit between sealing sleeve 2 and the inner wall of container 00. This further enhances the sealing effect and reduces the possibility of paste leakage.

[0041] Further, refer to Figure 2 and Figure 3 The piston may further include a connecting ring 3 also having elastic deformation characteristics. The connecting ring 3 is annular in structure as a whole and has a U-shaped cross-section, that is, one side of the connecting ring 3 is an arc surface and the other side has a notch. The U-shaped notch of the connecting ring 3 forms two inner and outer annular connecting ends. The annular connecting end located on the inner ring is attached to the plug body 1, and the annular connecting end located on the outer ring is attached to the sealing sleeve 2. The connecting ring 3, the plug body 1 and the sealing sleeve 2 form a dense seamless structure.

[0042] When the elastic container 00 is squeezed and deformed, the distance between the two annular connecting ends of the connecting ring 3 located at the inner ring and the outer ring is reduced. At the same time, relying on its own elastic force, it provides certain support for the sealing sleeve 2, further improving the overall deformation ability of the piston and improving the sealing effect of the sealing sleeve 2.

[0043] At this point, the entire piston has elastic deformation properties. As the container 00 body deforms, the piston also deforms accordingly, ensuring a tight seal between the piston and the container 00 body. Furthermore, even if the piston is squeezed in the elastic container 00, the corresponding deformation of the piston can continue to maintain a seal with the inner wall of the container 00, greatly improving the sealing effect of the piston.

[0044] Further, refer to Figure 1 and Figure 2 The outer wall of the plug body 1 near the paste outlet is adapted to the shape of the inner wall of the container 00 at the paste outlet. When the paste medium in the container 00 is almost gone, the piston is pushed to continue sliding toward the paste outlet and gradually fits against the inner wall of the container 00 to more thoroughly squeeze out the paste medium in the medium cavity and reduce the residue.

[0045] The aforementioned plug body 1, connecting ring 3 and sealing sleeve 2 with elastic deformation characteristics can be made of but not limited to elastomeric materials such as rubber, plastic, or composite materials with elastic deformation capabilities such as carbon fiber reinforced plastic, but the present invention is not limited to the specific materials of the plug body 1, connecting ring 3 and sealing sleeve 2.

[0046] The implementation principle of a piston for a medium container disclosed in the embodiment of this application is as follows:

[0047] The plug body 1, the connecting ring 3 and the sealing sleeve 2 all have elastic deformation characteristics, that is, the piston as a whole has elastic deformation characteristics, so as to form an elastic abutment with the inner wall of the container 00, maintaining the seal without affecting the sliding of the piston;

[0048] The expansion structure of the sealing sleeve 2 and the connecting ring 3 further increase the deformation amplitude of the entire piston, thereby forming a more stable sealing fit with the elastic container 00.

[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A piston for a medium container, characterized in that: It comprises a plug body (1) and a sealing sleeve (2), wherein the sealing sleeve (2) is sleeved on the circumference of the plug body (1) and is sealed against the inner wall of the container (00), and one end of the sealing sleeve (2) is connected to the plug body (1), and the other end extends in a direction close to the paste outlet of the container (00); A gap is formed between the sealing sleeve (2) and the plug body (1), and the sealing sleeve (2) has elastic deformation characteristics; The sealing sleeve (2) gradually expands in a direction close to the paste outlet; The plug body (1) has elastic deformation characteristics, and a gas gathering groove (4) is provided on a side of the plug body (1) away from the paste outlet, wherein the opening of the gas gathering groove (4) faces away from the paste outlet, and the bottom of the groove is located at a portion of the plug body (1) close to the paste outlet; The piston further comprises a connecting ring (3), the connecting ring (3) being an annular structure, the connecting ring (3) having a U-shaped cross section, the connecting ring (3) forming two inner and outer annular connecting ends, the annular connecting end located on the inner ring being attached to the plug body (1), and the annular connecting end located on the outer ring being attached to the sealing sleeve (2); The connecting ring (3) has elastic deformation characteristics; The outer wall of the plug body (1) near the paste outlet is adapted in shape to the inner wall of the container (00) located at the paste outlet.

2. A piston for a medium container according to claim 1, characterized in that: The plug body (1), the connecting ring (3) and the sealing sleeve (2) are an integrally formed structure.

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