A paste tube

Abstract

Disclosed is a paste tube, comprising: a tube body, a first partition plate being arranged in the tube body to divide the tube body into two or more accommodation cavities, the accommodation cavities being configured to accommodate paste; a tube shoulder, the tube shoulder being fixed to a head of the tube body, the tube shoulder being provided with a first extrusion opening for extruding the paste; and an inner liner, the inner liner being arranged on an inner side of the tube shoulder, the inner liner comprising a base and a connecting portion, the connecting portion being provided with a second extrusion opening for extruding the paste, the second extrusion opening being communicated to the first extrusion opening, wherein the base is sealingly connected to an inner wall of the head of the tube body, and two or more paste channels are arranged in the connecting portion, the paste channels being respectively communicated to each of the accommodation cavities and the second extrusion opening. By arranging the inner liner on the inner side of the tube shoulder, double sealing of the inner liner and the tube shoulder to the head of the tube body is achieved, the amount of paste remaining in the tube shoulder is reduced, and contamination of the paste when the tube shoulder is fixed to the tube body is also prevented.

Description

Technical Field

[0001] This utility model relates to packaging containers, and more particularly to a paste tube. Background Technology

[0002] To achieve the mixing and extrusion of multiple pastes, different pastes can usually be stored in separate, isolated cavities, and then the pastes are extruded through a screw-piston mechanism. The multiple pastes are mixed at the extrusion port to achieve the desired functional effect. Utility Model Content

[0003] This utility model provides a paste tube, comprising: The tube body defines an internal cavity, wherein a first partition is provided inside the tube body, the first partition dividing the internal cavity into two or more receiving cavities, the receiving cavities being configured to contain the paste; A shoulder, fixed to the head of the tube body, is provided with a first extrusion port for the paste to be extruded; and The inner liner is disposed on the inner side of the tube shoulder. The inner liner includes a base and a connecting portion. The connecting portion is provided with a second extrusion port for extruding the paste. The second extrusion port is connected to the first extrusion port. The base is sealed to the inner wall of the head of the tube body. The connecting portion is provided with two or more paste channels that respectively connect each accommodating cavity to the second extrusion port.

[0004] In some embodiments, the cross-sectional area of ​​the accommodating cavity gradually decreases from the head to the bottom of the tube.

[0005] In some embodiments, the cross-sectional area of ​​the paste channel gradually increases from the second extrusion port to the base.

[0006] In some embodiments, the liner is provided with a second partition that separates two or more paste channels, the top side of the second partition extending to be flush with the first extrusion port, and the bottom side of the second partition abutting against the top side of the first partition.

[0007] In some embodiments, the bottom side of the second partition is at least partially accommodated in a slot formed in the top side of the first partition.

[0008] In some embodiments, the tube shoulder is fixed to the head of the tube body by snapping, welding, bonding, or heat fusion.

[0009] In some embodiments, the inner wall of the first partition and the inner wall of the tube form an angle of less than or equal to 0.5° with the axial direction of the tube.

[0010] In some embodiments, the paste tube further includes an extrusion assembly, which includes a piston disposed in a receiving cavity and a movable member connected to the piston, wherein the movable member drives the piston to move in the receiving cavity to extrude paste from the receiving cavity.

[0011] In some embodiments, the moving part is a screw, which is threadedly connected to the piston, and the rotation of the screw drives the piston to move in the receiving cavity.

[0012] According to the present invention, the ointment tube achieves a double seal between the inner lining and the tube shoulder to the head of the tube body by setting an inner lining inside the tube shoulder, which reduces the amount of ointment remaining in the tube shoulder and also prevents contamination of the ointment when the tube shoulder is fixed to the tube body. Attached Figure Description

[0013] Figure 1 A schematic perspective view of a paste tube according to some embodiments of the present invention is shown; Figure 2 A schematic exploded view of a paste tube according to some embodiments of the present invention is shown; Figure 3 A schematic cross-sectional view of a paste tube according to some embodiments of the present invention is shown; Figure 4 It shows Figure 3 A partial enlarged view of a schematic cross-sectional view; Figure 5A and Figure 5B Perspective views of the inner lining of a paste tube according to some embodiments of the present invention are shown. Detailed Implementation

[0014] The ointment tube disclosed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer from the following detailed description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used for the purpose of conveniently and clearly illustrating the embodiments of this utility model.

[0015] See attached document Figures 1 to 5B Description of the ointment tube 100 according to this disclosure.

[0016] The paste tube 100 may include a tube body 10, a tube shoulder 33 fixed to the head of the tube body 10, an inner liner 34 disposed inside the tube shoulder 33, and an extrusion assembly.

[0017] The tube body 10 can be formed as a hollow cylinder, such as a hollow cylindrical shape, with the wall of the tube body 10 defining an internal cavity therebetween. The tube body 10 is open at both ends and has a head 10a and a bottom 10b opposite to the head 10a.

[0018] The ointment tube 100 may also include an end cap 31 and a base 32 disposed on one side of the bottom 10a, with the end cap 31 fastened to the tube shoulder 33.

[0019] A first partition 11 is provided in the tube body 10. The first partition 11 extends along the axial direction of the tube body 10 and divides the internal cavity of the tube body 10 into two or more receiving cavities 12. The receiving cavities 12 are configured to contain paste. In particular, the two or more receiving cavities 12 may have the same volume and be used to contain or fill different pastes, such as toothpaste. Alternatively, the receiving cavities 12 may also be configured such that their cross-sectional area gradually decreases from the head 10a to the bottom 10b of the tube body 10. In this case, when injection molding the tube body 10, the mold core needs to be inserted from the head 10a of the tube body to achieve injection molding (if the mold core is ejected from the bottom 10b, it is impossible to achieve a small inner diameter at the bottom and a large inner diameter at the head). Therefore, the tube body 10 and the tube shoulder 33 need to be two separate parts that are assembled with each other. For example, the tube shoulder 33 can be fixed to the head 10a of the tube body 10 by means of snap-fit, welding (e.g., ultrasonic welding), bonding, heat fusion, etc.

[0020] The shoulder 33 may be provided with a first extrusion port 331 for the paste to be extruded, and the paste in the accommodating cavity 12 may be discharged out of the paste tube 100 through the extrusion port 331.

[0021] A liner 34 is disposed inside the tube shoulder 33. The liner 34 seals the opening on the head 10a side, providing a double seal with the tube shoulder 33, further reducing the risk of leakage of the paste from the joint between the tube shoulder 33 and the tube body 10 during storage and use. The liner 34 also minimizes the amount of paste remaining in the paste tube 100, particularly within the tube shoulder 33, when the piston 21 has risen to its highest point (when it is no longer possible to extrude paste by moving the piston 21). Furthermore, the presence of the liner 34 prevents contamination of the paste when the tube shoulder 33 is secured to the tube body 10 after the paste has been poured from the tube head 10.

[0022] like Figure 5A and 5B As shown, the liner 34 may include a base 341 and a connecting portion 342. The base 341 may be implemented as a generally disc-shaped portion having a flange extending downward from the circumference of the disc. The connecting portion 342 is fixed to the disc-shaped base 341.

[0023] The base 341 is sealed to the inner wall of the head 10a of the tube body 10 to achieve a double seal with the shoulder 33 for the side opening of the head 10a.

[0024] The connecting portion 342 is provided with a second extrusion port 343 for extruding the paste, and the second extrusion port 343 is connected to the first extrusion port 331. In particular, the second extrusion port 342 can be arranged in the space surrounded by the first extrusion port 331.

[0025] The connecting portion 342 is provided with two or more paste channels 345 respectively connecting each receiving cavity 12 and the second extrusion port 342. The cross-sectional area of ​​the paste channels 345 gradually increases from the second extrusion port 343 to the base 341. This shape of the paste channels 345 makes the paste dispensing smoother. In some embodiments, the liner 34 may be provided with a second partition 344 separating the two or more paste channels 345. The top side 344a of the second partition 344 extends to be flush with the first extrusion port 331, such as... Figure 4 As shown. Furthermore, the bottom side 344b of the second partition 344 abuts against the top side of the first partition 11 to prevent undesirable mixing of the pastes from the different accommodating cavities 12 at the junction of the first partition 11 and the second partition 344. Specifically, as... Figure 4 As shown, the bottom side 344b of the second partition 344 is at least partially accommodated in the slot 111 formed in the top side of the first partition 11.

[0026] The extrusion assembly may include a piston 21 disposed in a receiving cavity and a movable member 22 connected to the piston 21. The movable member 22 drives the piston to move within the receiving cavity 12 to extrude the paste within the receiving cavity 12. The movable member 22 may be implemented as a screw, push rod, air bladder, etc. In a specific example shown in the figures, the movable member 22 is a screw threadedly connected to the piston 21, which has internal threads. The rotation of the screw 22 drives the piston 21 to move within the receiving cavity 12 to extrude the paste. In particular, the base 32 may be configured to drive the screw 22 to rotate by its rotation.

[0027] The piston 21 is interference-fitted into the accommodating cavity 12 to achieve a seal between the piston and the wall of the accommodating cavity 12, i.e. the inner wall of the tube body 10 and the first partition 11, to prevent the ointment from leaking.

[0028] The gradual decrease in cross-sectional area of ​​the receiving cavity 12 from the head 10a to the bottom 10b of the tube 10 allows the ointment tube to maintain optimal sealing performance before sale, enabling long-term storage. If the reduction in the cross-sectional area of ​​the receiving cavity 12 is too large, it may cause the piston 21 to move upwards with excessively loose contact with the inner wall, thus affecting leakage during use. Therefore, alternatively, the inner wall of the first partition 11 and the inner wall of the tube 10 form an angle of less than or equal to 0.5° with the axial direction of the tube 10.

[0029] Thus, the interference fit between the piston 21 and the accommodating cavity 12 gradually increases from the head 10a to the bottom 10b, and reaches its maximum at the bottom 10b of the tube body 10, reducing the leakage problem of the paste tube 100 during production, transportation, storage and sales.

[0030] On the other hand, the interference fit between the piston 21 and the accommodating cavity 12 gradually decreases from the bottom 10b to the head 10a. This means that during the use of the paste tube 100, when the piston 21 moves upward to extrude the paste, the interference fit and the resulting resistance gradually decrease. Users can drive the piston 21 to move with less force (e.g., a knob that drives the screw 22 to rotate) and push the piston 21 upward, thus ensuring a good user experience.

[0031] To further enhance the sealing between the piston 21 and the inner walls of the tube body 10 and the first partition 11, the piston 21 may include a central disk 211 and a contact cylinder 212 disposed on the outer periphery of the central disk 211. The contact cylinder 212 may extend around the entire periphery of the central disk 211. The central disk 211 may be cylindrical or bowl-shaped and may be integrally formed with the contact cylinder 212.

[0032] The shapes of the liner 34 and piston 21 can be designed such that piston 21 can move upward until the central disk 211 contacts the bottom side of the disk-shaped base 341, and the upper edge of the contact cylinder 212 contacts the lower edge of the flange of the base 341, as shown. Figure 4 As shown.

[0033] The contact cylinder 212 may include an upper contact flange 212a and a lower contact flange 212b. The upper contact flange 212a is located above the lower contact flange 212b, and both are configured to contact the inner wall of the first partition 11 and the inner wall of the tube body 10 to achieve a double seal.

[0034] The upper contact flange 212a and the lower contact flange 212b may be arranged obliquely relative to the axial direction of the tube body 10. The contact cylinder 212 may also include a connecting portion 212b disposed between the upper contact flange 212a and the lower contact flange 212b. The connecting portion 212b may have a flat outer surface, i.e., an outer surface parallel to the axial direction of the tube body 10. The upper contact flange 212a and the lower contact flange 212b are connected to the central disk 211 via the connecting portion 212c.

[0035] In some implementations, a gap is formed between the upper contact flange 212a and the lower contact flange 212b and the central disk 211, thereby providing space for the piston 21 to deform inward when it is squeezed by the inner wall of the accommodating cavity 12.

[0036] In some implementations, the interference fit wall of the piston needs to have a certain wall thickness to better achieve the interference fit without causing excessive extrusion pressure that would make the piston difficult to move. Therefore, the interference fit wall of the piston is required. Alternatively, the thickness of the upper contact flange 212a and the lower contact flange 212b can be less than 1 mm to ensure that the piston 21 is not difficult to move due to excessive extrusion pressure.

[0037] In order to achieve an interference fit and ensure that the piston 21 can move under the interference fit, the piston 21 can be made of an elastic material, selected from any one of PP, PE, TPE, TPU, silicone, rubber or combinations thereof, with a flexural modulus of less than or equal to 1500 MPa, particularly in the range of 800 MPa to 1500 MPa.

[0038] The extrusion assembly may also include a mounting plate 25 connected to the bottom 10b of the tube body 10. The mounting plate 25 has a mounting hole through which the screw 22 passes. The end of the screw 22 extending through the mounting plate 25 may be provided with a driven gear 23.

[0039] The extrusion assembly may also include a drive gear 24 that meshes with each driven gear 23 and a positioning element 26 for positioning the drive gear 24.

[0040] The positioning member 26 is fixed to the mounting plate 25, wherein the shank of the drive gear 24 passes through the positioning hole therein.

[0041] The base 32, for example via a form-fit connection, is connected to the shank of the drive gear 24, so that the base 32 can rotate relative to the tube body 10, and the rotation of the base 32 drives the rotation of the drive gear 24, which in turn drives the driven gears 23. In particular, each driven gear 23 rotates, and the rotation of the driven gears 23 drives the rotation of the screw 22, thereby enabling the piston 21 to move in the receiving cavity 12 to extrude the paste.

[0042] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0043] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0044] The singular forms “a,” “the,” and “the” used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0045] Obviously, those skilled in the art can make various modifications and variations to the negative electrode current collector for solid-state batteries, the method for preparing such a negative electrode current collector, and the negative electrode for solid-state batteries disclosed in this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A paste tube, characterized in that, include: A tube body defining an internal cavity, wherein a first partition is provided within the tube body, the first partition dividing the internal cavity into two or more receiving cavities, the receiving cavities being configured to contain an ointment; A shoulder, fixed to the head of the tube body, is provided with a first extrusion port for the paste to be extruded; and A liner, disposed on the inner side of the tube shoulder, the liner comprising a base and a connecting portion, the connecting portion having a second extrusion port for extruding the paste, the second extrusion port communicating with the first extrusion port, wherein the base is sealingly joined to the inner wall of the head of the tube body, and the connecting portion having two or more paste channels respectively communicating each of the receiving cavities with the second extrusion port.

2. The ointment tube according to claim 1, characterized in that, The cross-sectional area of ​​the accommodating cavity gradually decreases from the head to the bottom of the tube.

3. The ointment tube according to claim 1, characterized in that, The cross-sectional area of ​​the paste channel gradually increases from the second extrusion port to the base.

4. The ointment tube according to claim 1, characterized in that, The liner is provided with a second partition that separates the two or more paste channels. The top side 2 of the second partition extends to be flush with the first extrusion port, and the bottom side of the second partition abuts against the top side of the first partition.

5. The ointment tube according to claim 4, characterized in that, The bottom side of the second partition is at least partially accommodated in a slot formed in the top side of the first partition.

6. The ointment tube according to claim 1, characterized in that, The shoulder of the tube is fixed to the head of the tube body by snapping, welding, bonding, or hot-melting.

7. The ointment tube according to claim 1, characterized in that, The inner wall of the first partition and the inner wall of the tube form an angle of less than or equal to 0.5° with the axial direction of the tube.

8. The ointment tube according to claim 1, characterized in that, It also includes an extrusion assembly comprising a piston disposed in the accommodating cavity and a movable member connected to the piston, wherein the movable member drives the piston to move within the accommodating cavity to extrude the paste from the accommodating cavity.

9. The ointment tube according to claim 8, characterized in that, The moving component is a screw, which is threadedly connected to the piston. The rotation of the screw drives the piston to move within the accommodating cavity.

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