Dropper with protective inner membrane

Abstract

The utility model discloses a kind of dropper with protective inner membrane, including bottle cap, pressing part, protective inner membrane and straw, the first flanging extending inwards is set to form mounting hole in the circumferential direction on bottle cap upper end;The material of pressing part is elastic material, and the pressing part is the hollow structure of lower end opening, and the lower end of pressing part is arranged in mounting hole, and is clamped by first flanging, and the material of protective inner membrane is soft plastic, and is attached to the lower side and inner side of pressing part, and the lower end wall thickness of protective inner membrane is greater than its upper end wall thickness, and the upper end of straw is wrapped by the lower end of protective inner membrane, forms contact surface, and the height of contact surface is greater than or equal to 1cm.The utility model proposes a kind of dropper, prevent pigment in pressing part from being precipitated to cosmetic.

Description

Technical Field

[0001] This utility model relates to the field of cosmetic container technology, and in particular to a dropper with a protective inner membrane. Background Technology

[0002] Dropper-type containers are widely used in the cosmetics industry. For example, patent application number CN201811478275.0 discloses a cosmetic container, which includes a container body, a pressing part, and a dropper. The cosmetic is contained in the container body. The pressing part is a hollow structure and is installed at the upper end of the dropper. The lower end of the dropper is inserted into the cosmetic. Squeezing the pressing part can draw the cosmetic into the dropper and the pressing part. After squeezing the pressing part again, the cosmetic in the pressing part and the dropper is squeezed out for application.

[0003] Existing pump dispensers are often made of silicone, which has good elasticity and can automatically recover after being squeezed. However, existing cosmetic pump dispensers are often made of colored silicone. Although this improves the appearance of the container, when the cosmetic comes into contact with the pump dispenser, the pigment in the pump dispenser is easily released into the cosmetic, causing other colors to appear in the cosmetic. Although this does not affect the use of the cosmetic, it gives people an uncomfortable feeling. Utility Model Content

[0004] In order to solve the problem that pigments in the pressing part of existing dropper containers can easily leach into cosmetics and cause discoloration, this utility model proposes a dropper that prevents pigments in the pressing part from leaching into cosmetics.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dropper with a protective inner membrane includes a cap, a pressing part, a protective inner membrane, and a straw. The upper end of the cap has a first flange extending inward along the circumference to form a mounting hole. The pressing part is made of an elastic material and has a hollow structure with an open lower end. The lower end of the pressing part is set in the mounting hole and is held in place by the first flange. The protective inner membrane is made of soft plastic and is attached to the lower and inner sides of the pressing part. The lower end of the protective inner membrane has a wall thickness greater than its upper end. The lower end of the protective inner membrane wraps around the upper end of the straw to form a contact surface. The height of the contact surface is greater than or equal to 1 cm.

[0007] Through the above design, firstly, the inner protective film is made of a chemically more stable material. The inner protective film adheres to the pressing part, preventing cosmetics from contacting the pressing part and thus preventing discoloration of the cosmetics; secondly, the lower end of the inner protective film has better rigidity, which can firmly wrap the upper end of the straw, and the thinner wall at the upper end makes it easier to deform, allowing the pressing part to recover smoothly; thirdly, the contact area between the lower end of the inner protective film and the upper end of the straw is larger, ensuring good airtightness between the inner protective film and the straw.

[0008] Furthermore, the soft plastic is PE, PU, ​​or PP.

[0009] Furthermore, the upper end of the straw is provided with a raised rib along the outer periphery, and the upper end of the contact surface is provided with a sealing groove along the circumference, with the raised rib being stuck in the sealing groove.

[0010] With the above design, firstly, the upper end of the straw is less likely to detach from the pressing part; secondly, the raised ribs and sealing grooves increase the contact area between the upper end of the straw and the protective inner membrane, further improving airtightness.

[0011] Furthermore, the inner wall of the pressing part bulges inward, forming a first annular protrusion above the upper end of the straw, and the lower side of the protective inner film attached to the surface of the first annular protrusion is attached to the upper end face of the straw.

[0012] With the above configuration, the first annular protrusion increases the rigidity of the pressing part at the upper end of the straw. When the pressing part is squeezed, the pressing part is not easily deformed at the first annular protrusion, and the corresponding protective inner membrane will not separate from the straw to form a gap, thus preventing cosmetics from entering.

[0013] Furthermore, the inner diameter of the first annular boss is smaller than the outer diameter of the straw.

[0014] The above settings ensure the height of the first annular boss and the rigidity of the pressing part at the first annular boss.

[0015] Furthermore, a slot adapted to the first flange is provided along the outer periphery at the lower end of the pressing part, and the first flange is locked in the slot.

[0016] The above design prevents the pressing part from easily detaching from the bottle cap.

[0017] Furthermore, a second annular boss is fixedly connected to the lower end of the pressing part along the outer periphery, and a second flange extending outward is fixedly connected to the lower end of the pressing part along the circumferential direction. The aforementioned groove is formed between the second annular boss and the second flange, and the lower end of the protective inner membrane extends to the lower side of the second flange.

[0018] The above settings further increase the rigidity of the lower end of the pressing part, making it less prone to deformation of the pressing part and the lower end of the protective inner film, thus ensuring airtightness between the pressing part and the bottle cap, and between the protective inner film and the upper end of the straw.

[0019] Furthermore, there is a rounded transition between the lower end of the pressing part and the second flange.

[0020] The above setup makes it easy to install the straw inside the protective inner membrane.

[0021] Furthermore, the pressing part is basically a cylindrical structure, and the outer diameter of the pressing part is basically equal to the diameter of the mounting hole. The upper end of the pressing part is hemispherical, and the outer periphery of the second annular boss is provided with a conical surface. The upper end of the conical surface is narrowed and connected to the side of the pressing part.

[0022] The above design makes it easy to install the pressing part upwards into the mounting hole.

[0023] Furthermore, the wall thickness at the upper end of the protective inner membrane is less than or equal to 0.4 mm, and the wall thickness at the lower end of the protective inner membrane is greater than or equal to 0.5 mm. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the dropper used in an embodiment.

[0025] Figure 2 This is a side view of the dropper used in an embodiment.

[0026] Figure 3 This is a cross-sectional view of the dropper used in an embodiment.

[0027] Figure 4 for Figure 3 Enlarged view of point A. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0029] like Figures 1 to 4 A dropper with a protective inner membrane includes a cap 3, a pressing part 4, a protective inner membrane 5, and a straw 6. The upper end of the cap 3 is provided with a first flange 7 extending inward along the circumference to form a mounting hole. The pressing part 4 is made of an elastic material and is a hollow structure with an open lower end. The lower end of the pressing part 4 is set in the mounting hole and is held in place by the first flange 7. The protective inner membrane 5 is made of soft plastic and is attached to the lower and inner sides of the pressing part 4. The lower wall thickness of the protective inner membrane 5 is greater than the upper wall thickness. The lower end of the protective inner membrane 5 wraps around the upper end of the straw 6 to form a contact surface 8. The height of the contact surface 8 is greater than or equal to 1 cm.

[0030] Through the above design, firstly, the protective inner membrane 5 is made of a material with better chemical stability. The protective inner membrane 5 adheres to the pressing part 4, preventing cosmetics from contacting the pressing part 4 and thus preventing discoloration of the cosmetics. Secondly, the lower end of the protective inner membrane 5 has good rigidity, allowing it to firmly wrap around the upper end of the straw 6. The thinner wall at the upper end makes it easier to deform, allowing the pressing part 4 to recover smoothly. Thirdly, the contact area between the lower end of the protective inner membrane 5 and the upper end of the straw 6 is larger, ensuring good airtightness between the protective inner membrane 5 and the straw 6. As one implementation method, the soft plastic is PE, PU, ​​or PP, or other alternative soft plastics.

[0031] The dropper of this application is used in cosmetic containers. The cap 3 has an internal thread that can be tightened onto the container to achieve a seal. The pressing part 4 is made of silicone, which has good material properties. The pressing part 4 can be made of transparent or opaque material. The protective inner film 5 is attached to the inside and bottom of the pressing part 4. The protective inner film 5 is made of a plastic material with better elasticity and chemical stability, which separates the cosmetic from the silicone pressing part 4, preventing the cosmetic from contacting the pressing part 4 and releasing pigments from the pressing part 4, thereby preventing the cosmetic from discoloring. The protective inner film 5 is made of transparent material to further prevent the cosmetic from discoloring. The lower end of the protective inner film 5 has a thick wall. t1 is greater than the upper wall thickness t2, which makes the lower end of the protective inner film 5 more rigid and able to stably wrap the upper end of the straw 6. The wall thickness of the protective inner film 5 above the straw 6 is t2, which allows the pressing part 4 to successfully recover after being pressed. The distance between the lower end and the upper end of the contact surface 8 is the height of the contact surface 8. When the height h of the contact surface 8 is greater than or equal to 1cm, the contact area between the protective inner film 5 and the upper end of the straw 6 is larger, ensuring good airtightness between the straw 6 and the protective inner film 5. After squeezing and releasing the pressing part 4, the cosmetic can be sucked into the straw 6 and the pressing part 4. After squeezing the pressing part 4 again, the cosmetic can be squeezed out for application.

[0032] As one implementation method, the upper end of the straw 6 is provided with a raised rib 9 along the outer periphery, and the upper end of the contact surface 8 is provided with a sealing groove 10 along the circumferential direction, with the raised rib 9 being stuck in the sealing groove 10.

[0033] With the above settings, firstly, the upper end of the straw 6 is not easily separated from the pressing part 4; secondly, the rib 9 and the sealing groove 10 increase the contact area between the upper end of the straw 6 and the protective inner membrane 5, further improving the airtightness.

[0034] In one implementation, the inner wall of the pressing part 4 protrudes inward, forming a first annular protrusion 11 above the upper end of the straw 6, and the lower side of the protective inner film 5 attached to the surface of the first annular protrusion 11 is attached to the upper end face of the straw 6.

[0035] With the above configuration, the first annular protrusion 11 increases the rigidity of the pressing part 4 at the upper end of the straw 6. When the pressing part 4 is squeezed, the pressing part 4 is not easily deformed at the first annular protrusion 11, and the corresponding protective inner membrane 5 will not separate from the straw 6 to form a gap, thus preventing cosmetics from entering.

[0036] As one implementation, the inner diameter d1 of the first annular boss 11 is smaller than the outer diameter d2 of the straw 6.

[0037] The above settings ensure the height of the first annular boss 11 and the rigidity of the pressing part 4 at the first annular boss 11.

[0038] As one implementation method, the lower end of the pressing part 4 is provided with a slot 12 that is adapted to the first flange 7 along the outer periphery, and the first flange 7 is locked in the slot 12.

[0039] The above design makes it difficult for the pressing part 4 to detach from the bottle cap 3.

[0040] In one implementation, a second annular boss 13 is fixedly connected to the lower end of the pressing part 4 along the outer periphery, and a second flange 14 extending outward is fixedly connected to the lower end of the pressing part 4 along the circumferential direction. The aforementioned groove 12 is formed between the second annular boss 13 and the second flange 14, and the lower end of the protective inner membrane 5 extends to the lower side of the second flange 14.

[0041] The above settings further increase the rigidity of the lower end of the pressing part 4, making it less prone to deformation of the lower end of the pressing part 4 and the protective inner film 5, and ensuring the airtightness between the pressing part 4 and the bottle cap 3, as well as between the protective inner film 5 and the upper end of the straw 6.

[0042] As one implementation method, there is a rounded transition between the lower end of the pressing part 4 and the second flange 14.

[0043] The above setup facilitates the installation of the straw 6 within the protective inner membrane 5.

[0044] As one implementation method, the pressing part 4 is basically a cylindrical structure. The outer diameter of the pressing part 4 is basically equal to the diameter of the mounting hole. The upper end of the pressing part 4 is hemispherical. The outer periphery of the second annular boss 13 is provided with a conical surface. The upper end of the conical surface is narrowed and connected to the side of the pressing part 4.

[0045] The above configuration makes it easy to install the pressing part 4 upwards into the mounting hole.

[0046] When installing the pressing part 4, the upper end of the pressing part 4 is inserted into the mounting hole. The wall of the mounting hole presses the conical surface, and the pressing part 4 deforms inward. When the slot 12 moves upward to the first flange 7, the pressing part 4 returns to its original position, and the first flange 7 is inserted into the slot 12, thus completing the installation of the pressing part 4.

[0047] As one implementation, the wall thickness t2 at the upper end of the protective inner membrane 5 is less than or equal to 0.4 mm, and the wall thickness t1 at the lower end of the protective inner membrane 5 is greater than or equal to 0.5 mm. Specifically, the wall thickness at the upper end of the protective inner membrane is 0.1-0.2 mm, preferably 0.1 mm.

[0048] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A dropper with a protective inner lining, characterized in that, The device includes a bottle cap, a pressing part, a protective inner film, and a straw. The upper end of the bottle cap has a first flange extending inward along the circumference to form a mounting hole. The pressing part is made of an elastic material and is a hollow structure with an open lower end. The lower end of the pressing part is set in the mounting hole and is held in place by the first flange. The protective inner film is made of soft plastic and is attached to the lower and inner sides of the pressing part. The lower wall thickness of the protective inner film is greater than the upper wall thickness. The lower end of the protective inner film wraps around the upper end of the straw to form a contact surface. The height of the contact surface is greater than or equal to 1 cm.

2. The dropper with a protective inner membrane according to claim 1, characterized in that, The soft plastic is PE, PU, ​​or PP.

3. A dropper with a protective inner lining according to claim 1, characterized in that, The upper end of the straw is provided with a raised rib along the outer periphery, and the upper end of the contact surface is provided with a sealing groove along the circumferential direction, with the raised rib being stuck in the sealing groove.

4. A dropper with a protective inner lining according to claim 3, characterized in that, The inner wall of the pressing part bulges inward, forming a first annular protrusion above the upper end of the straw. The lower side of the protective inner film attached to the surface of the first annular protrusion is attached to the upper end face of the straw.

5. A dropper with a protective inner membrane according to claim 4, characterized in that, The inner diameter of the first annular boss is smaller than the outer diameter of the straw.

6. A dropper with a protective inner lining according to claim 1, characterized in that, The lower end of the pressing part is provided with a slot along the outer periphery that is adapted to the first flange, and the first flange is locked in the slot.

7. A dropper with a protective inner lining according to claim 6, characterized in that, The lower end of the pressing part is fixedly connected to a second annular boss along its outer periphery, and the lower end of the pressing part is fixedly connected to a second flange extending outward along its circumferential direction. The aforementioned groove is formed between the second annular boss and the second flange, and the lower end of the protective inner film extends to the lower side of the second flange.

8. A dropper with a protective inner lining according to claim 7, characterized in that, The lower end of the pressing part and the second flange are connected by a rounded transition.

9. A dropper with a protective inner liner according to claim 7, characterized in that, The pressing part is basically cylindrical in shape, and its outer diameter is basically equal to the diameter of the mounting hole. The upper end of the pressing part is hemispherical. The outer periphery of the second annular boss is provided with a conical surface. The upper end of the conical surface is narrowed and connected to the side of the pressing part.

10. A dropper with a protective inner membrane according to claim 1, characterized in that, The wall thickness at the upper end of the protective inner membrane is less than or equal to 0.4 mm, and the wall thickness at the lower end of the protective inner membrane is greater than or equal to 0.5 mm.

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