High-rigidity polymer dropper and its preparation method

Abstract

The present invention relates to a high-rigidity polymer dropper and a preparation method thereof, and is designed for the technical problems that the head cap assembly of existing similar products is difficult to be automatically produced and assembled, and it is difficult to scrape the liquid on the outer diameter of the dropper at the bottle mouth clean when taking it out. A large ring is provided at the bottom of the inner cover of the dropper, the rubber head extends out of the large ring and abuts against the inner bottom of the head cap extending out of the outer cover, the head cap extends out of the top orifice of the outer cover and is fixed inside the outer cover, and an inner plug is provided at the top orifice of the middle ring; the key point is that the top orifice of the inner plug is provided with an outwardly turned edge, a buckle ring is provided on the outer diameter of the transition cavity below the outwardly turned edge of the inner plug, the outwardly turned edge of the inner plug fits against the top orifice of the middle ring, at the same time, the buckle ring of the inner plug is buckled with the inner diameter buckle groove of the top orifice of the middle ring, a dropper section with a diameter smaller than that of the transition cavity is provided below the transition cavity of the inner plug, the dropper section is provided with equally spaced hollow holes, the bottom orifice of the inner plug at the end of the dropper section abuts and fits against the outer diameter of the dropper, and the circumferential surface of the inner plug gradually decreases to form a stepped surface.

Description

Technical Field

[0001] The present invention relates to a dropper, and in particular to a high-rigidity polymer dropper and a preparation method thereof. Background Art

[0002] A dropper bottle refers to a bottle in which the liquid in the bottle body flows out drop by drop through a dropper head. Some dropper bottles, also known as drip bottles, are provided with a dropper tube that is used independently and inserted into the bottle mouth. Some drip bottles are provided with a rubber dropper nozzle or a spray nozzle, and the liquid is dripped out by inverting or squeezing the bottle body. For example, the patent application No. 202110093913.2 disclosed in Chinese patent literature, the application publication date is May 18, 2021, and the invention name is "A Double-Chamber Cosmetic Container"; another example is the patent application No. 202110112014.2 disclosed in Chinese patent literature, the application publication date is May 14, 2021, and the invention name is "A Double-Material Mixed Cosmetic Dropper Bottle". However, few of the existing droppers of the same kind adopt the structure of an inner plug to scrape off the liquid outside the outer diameter. There is a similar inner plug structure design in existing lip gloss products. Since the density of the liquid in the dropper product is different from that of the liquid in the lip gloss product, it is difficult to directly apply it to the dropper product. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the present invention is to provide a high-rigidity polymer dropper and a preparation method thereof to the art, so as to solve the technical problems that the assembly of the head cap of the existing similar products is difficult to be automatically produced and assembled, the liquid outside the outer diameter of the dropper at the bottle mouth is difficult to be scraped clean when taken out, resulting in waste, and the material preparation method needs to be improved. The purpose is achieved through the following technical solutions.

[0004] A highly rigid polymer dropper. At the inner bottom of the outer cover of the dropper, there is a large ring. One end of the rubber head extends out of the large ring and abuts against the inner bottom of the head cap that extends out of the outer cover. The head cap extends out of the top orifice of the outer cover and is fixed inside the outer cover. The diameter of the cap orifice at the bottom of the head cap is larger than the outer diameter above the cap orifice of the head cap, and the outer diameter of the cap orifice at the bottom of the head cap is limited inside the outer cover. The other end of the rubber head is fixed to the central hole at the top of the large ring. One end of the dropper is sleeved with the rubber head inside the large ring, and the channel inside the dropper communicates with the air cavity at the top of the rubber head. At the top orifice of the middle ring, there is an inner plug. The other end of the dropper extends into the bottle body through the middle ring and the inner plug. The inner thread of the large ring is connected to the outer thread at the top orifice of the middle ring, and the bottom orifice of the middle ring is snap-fitted and fixed to the top bottle orifice of the bottle body. The key point of its structural design is that the top orifice of the inner plug is provided with an outward-turned edge. An engaging ring is provided on the outer diameter of the transition cavity below the outward-turned edge of the inner plug. The outward-turned edge of the inner plug fits against the top orifice of the middle ring. At the same time, the engaging ring of the inner plug is snap-fitted with the snap groove on the inner diameter of the top orifice of the middle ring. Below the transition cavity of the inner plug, there is a dropper section with a diameter smaller than that of the transition cavity. The dropper section is provided with equally spaced hollow holes. The bottom orifice of the inner plug at the end of the dropper section abuts against and fits with the outer diameter of the dropper. The circumferences of the outward-turned edge, the engaging ring, and the dropper section of the inner plug decrease in sequence to form a stepped surface. Thus, the bottle body assembly includes the middle ring and the bottle body. The inner plug is fixed to the bottle orifice of the middle ring. When taking out the dropper, the liquid on the outer diameter of the dropper is scraped off by the inner plug at the bottle orifice of the middle ring of the bottle body assembly.

[0005] Above the ring rib at the outer diameter of the bottom orifice of the large ring, there is a toothed ring rib smaller than the diameter of the ring rib. The large ring is snap-fitted and fixed to the cover orifice groove at the inner diameter of the bottom cover orifice of the outer cover through the ring rib at the outer diameter of the bottom orifice. At the same time, the toothed ring rib of the large ring is inserted and fixed into the positioning groove between the cover blocks on the inner wall above the cover orifice groove of the outer cover, and the reinforcing ribs equally spaced on the inner wall of the outer cover above the positioning groove. Thus, the large ring is snap-fitted and fixed inside the cover orifice of the outer cover. The large ring, the outer cover, the head cap, the rubber head, and the dropper are combined to form a bottle cap assembly.

[0006] Outside the central hole at the top of the large ring, there is an outer ring. At the end angles between the outer side of the outer ring and the top ring surface of the large ring, there are equally spaced side strengthening ribs. The above structure strengthens the firmness of the large ring and improves the service life of the large ring.

[0007] When the top of the rubber head abuts against the inner ring at the inner bottom of the head cap, the outer diameter of the air cavity at the top of the rubber head is sleeved into the outer ring at the inner bottom of the head cap. The outer ring at the inner bottom of the head cap is located outside the inner ring. The outer ring of the head cap is higher than the inner ring, and the outer diameter of the top of the rubber head is smaller than the inner diameter of the outer ring of the head cap. Thus, it is convenient for the top of the rubber head to be located inside the outer ring of the head cap. The top inside the outer ring abuts against the top of the rubber head, and the top of the rubber head deforms and expands outward.

[0008] On one side of the outer diameter of the bottle body below the fastening and fixing position of the bottom ring of the middle ring and the top bottle mouth of the bottle body, there is a gear rib. When the inner ring groove at the bottom ring of the middle ring is fastened and fixed with the outer ring rib at the top bottle mouth of the bottle body, the gear rib of the bottle body meshes with the tooth ring wall in the middle ring, and the inner side notch of the inner ring groove of the middle ring is lower than the outer side notch. This facilitates further improvement of the firmness and stability between the bottle body and the middle ring, and provides sealing between the bottle body and the middle ring.

[0009] On one side of the gear rib and the outer ring rib of the bottle body, there is a positioning groove. On one side of the inner ring groove and the tooth ring wall of the middle ring, there is a positioning rib. When the positioning groove of the bottle body is inserted into the positioning rib of the middle ring, the inner ring groove at the bottom ring of the middle ring is fastened and fixed with the outer ring rib at the top bottle mouth of the bottle body, and the gear rib of the bottle body meshes with the tooth ring wall in the middle ring. This facilitates the directional assembly of the middle ring and the bottle body, and thus facilitates automated production.

[0010] The bottle body is a high-rigidity polymer bottle body, and the high-rigidity polymer material is made of the following components by weight ratio: 72 - 84 parts of high-density polyethylene, 10 - 20 parts of aluminum hydroxide, 5 - 10 parts of calcium oxide, 8 - 10 parts of glycerol, 3 - 5 parts of modified graphene oxide colloid, 1 - 3 parts of antioxidant, and 1 - 2 parts of ultraviolet light absorber; it includes the following steps: a) A sodium citrate and silver nitrate aqueous solution with a concentration of 0.01 - 0.5M is mixed evenly in a three-necked flask, a certain amount of graphene oxide aqueous solution is added, and then a certain amount of a 40% volume fraction of poly(diallyldimethylammonium chloride) solution is added. For every 100mg of graphene oxide colloid, the volume fraction of poly(diallyldimethylammonium chloride) solution is 4 - 5ml. It is magnetically stirred at room temperature for 12 - 15 hours, and then magnetically stirred in an oil bath at 130 - 150°C for 3 - 5 hours. Then, sodium citrate is added for the second time as a reducing agent for graphene oxide. 20mL of triethylamine is added to the three-necked flask, and 7mL of acyl bromide is dissolved in 20mL of xylene and added dropwise within 15 minutes. Graphene oxide is prepared into a modified graphene oxide colloid by stirring with sodium citrate and poly(diallyldimethylammonium chloride) under mild conditions, that is, at 60 - 80°C, for 6 - 9 hours; b) The above-mentioned high-density polyethylene, aluminum hydroxide, calcium oxide, glycerol, modified graphene oxide colloid, antioxidant, and ultraviolet light absorber are mixed evenly. At the same time, a compatibilizer PE-b-M, carbon nanotubes, and silicon dioxide are added, and they are heated and mixed evenly in a mixer for 20 - 30 minutes. Granulation is carried out to obtain modified particles. The modified particles are used as the material for making the bottle body by using a double-layer co-extrusion blow molding device. In the extrusion die of this device, they are mixed into a tubular melt. After the tubular melt is stretched, blown, and cooled by a blow molding die, a finished product is obtained.

[0011] The antioxidant is one or more of antioxidant A30, antioxidant HS02, antioxidant H3336 or antioxidant H10; the curing agent is selected from tert-butyl peroxybenzoate; the ultraviolet light absorber is one or more of ultraviolet light absorber UV320, ultraviolet light absorber UV380 or ultraviolet light absorber UV670.

[0012] The structure design of the present invention is reasonable, the production, assembly and use operations are convenient, especially the liquid saving effect during use is good, it is convenient for automatic production and assembly, and the preparation method is feasible; it is suitable for use as a dropper bottle and the structural improvement of its similar products. Brief Description of the Drawings

[0013] Figure 1 is the schematic explosion structure diagram of the present invention.

[0014] Figure 2 is the schematic cross-sectional structure diagram of the present invention.

[0015] Figure 3 is the schematic external structure diagram of the present invention.

[0016] Figure 4 is the schematic cross-sectional structure diagram of the explosion state of the present invention.

[0017] Figure 5 is the schematic cross-sectional structure diagram of the open state of the bottle cap assembly of the present invention.

[0018] Reference Numerals and Names of the Drawings: 1. Head Cap, 101. Inner Ring, 102. Outer Ring, 2. Rubber Head, 3. Outer Cover, 301. Cover Mouth Groove, 302. Cover Mouth Block, 303. Reinforcing Rib, 4. Dropper, 5. Inner Plug, 501. Turned-out Edge, 502. Buckle Ring, 503. Dropper Section, 6. Large Ring, 601. Ring Mouth Rib, 602. Tooth Ring Rib, 603. Edge Reinforcing Rib, 7. Middle Ring, 701. Tooth Ring Wall, 702. Inner Ring Groove, 8. Bottle Body, 801. Gear Rib, 802. Outer Ring Rib, 803. Positioning Groove. Detailed Embodiments

[0019] Now in combination with the drawings, the structure of the present invention will be further described. As Figures 1-5As shown in the figure, a large ring 6 is provided at the inner bottom of the mouth of the outer cover 3 of the dropper. One end of the rubber head 2 extends out of the large ring and abuts against the inner bottom of the head cap 1 that extends out of the outer cover. The head cap extends out of the top orifice of the outer cover and is fixed inside the outer cover. The diameter of the mouth of the head cap at the bottom is larger than the outer diameter above the mouth of the head cap. The outer diameter of the mouth of the head cap at the bottom is limited inside the outer cover. The other end of the rubber head is fixed at the central hole at the top of the large ring. One end of the dropper 4 is sleeved with the rubber head inside the large ring. The channel inside the dropper communicates with the air cavity at the top of the rubber head. An inner plug 5 is provided at the top orifice of the middle ring 7. The other end of the dropper extends into the bottle body 8 through the middle ring and the inner plug. The internal thread of the large ring is connected to the external thread at the top orifice of the middle ring. The bottom orifice of the middle ring is snap-fitted and fixed to the top bottle mouth of the bottle body. The bottle body is a 30 ml bottle body. The top orifice of the inner plug is provided with an outward-turned edge 501. A snap ring 502 is provided on the outer diameter of the transition cavity below the outward-turned edge of the inner plug. The outward-turned edge of the inner plug fits against the top orifice of the middle ring. At the same time, the snap ring of the inner plug is snap-fitted with the snap groove on the inner diameter of the top orifice of the middle ring. Below the transition cavity of the inner plug, there is a dropper section 503 with a diameter smaller than the transition cavity. The dropper section is provided with equally spaced hollow holes. The bottom orifice of the inner plug at the end of the dropper section abuts against and fits with the outer diameter of the dropper. The circumferential surfaces between the outward-turned edge, the snap ring, and the dropper section of the inner plug decrease in sequence to form a stepped surface. Above the orifice rib 601 on the outer diameter of the bottom orifice of the large ring, there is a toothed ring rib 602 with a diameter smaller than the orifice rib. The large ring is snap-fitted and fixed to the orifice groove 301 on the inner diameter of the bottom orifice of the outer cover through the orifice rib on the outer diameter of the bottom orifice. At the same time, the toothed ring rib of the large ring is inserted and fixed in the positioning groove between the cover blocks 302 on the inner wall above the orifice groove of the outer cover, and the reinforcing ribs 303 are equally spaced on the inner wall of the outer cover above the positioning groove. An outer ring is provided outside the central hole at the top of the above-mentioned large ring. Equally spaced edge strengthening ribs 603 are provided at the end angles between the outer side of the outer ring and the top ring surface of the large ring.

[0020] When the top of the above-mentioned rubber head abuts against the inner ring 101 at the inner bottom of the head cap, the outer diameter of the air cavity at the top of the rubber head is sleeved into the outer ring 102 at the inner bottom of the head cap. The outer ring at the inner bottom of the head cap is located outside the inner ring. The outer ring of the head cap is higher than the inner ring. The outer diameter of the top of the rubber head is smaller than the inner diameter of the outer ring of the head cap. On one side of the outer diameter of the bottle body below the snap-fitting and fixing position where the bottom orifice of the middle ring is snap-fitted and fixed to the top bottle mouth of the bottle body, there is a gear rib 801. When the inner ring groove 702 at the bottom orifice of the middle ring is snap-fitted and fixed to the outer ring rib 802 at the top bottle mouth of the bottle body, the gear rib of the bottle body meshes with the toothed ring wall 701 inside the middle ring. The inner side orifice of the inner ring groove of the middle ring is lower than the outer side orifice. At the same time, on one side of the gear rib and the outer ring rib of the bottle body, there is a positioning groove 803. On one side of the inner ring groove and the toothed ring wall of the middle ring, there is a positioning rib. When the positioning groove of the bottle body is inserted into the positioning rib of the middle ring, the inner ring groove at the bottom orifice of the middle ring is snap-fitted and fixed to the outer ring rib at the top bottle mouth of the bottle body, and the gear rib of the bottle body meshes with the toothed ring wall inside the middle ring.

[0021] The specific steps for assembling the dropper are as follows: Head cap assembly: Push the head cap upward from below the outer cover, and the head cap fits with the outer cover to complete the assembly. Rubber head assembly: Stretch and assemble the rubber head upward from below the large ring, and the rubber head and the large ring are firmly snapped into place with a strong snap fit to complete the assembly. Dropper assembly: Assemble the dropper upward from below the rubber head assembly, and the dropper and the rubber head of the rubber head assembly are firmly snapped into place with a strong snap fit to complete the assembly; among them, for A1 assembly, assemble the head cap assembly downward from above the dropper assembly, and the outer cover of the head cap assembly and the large ring of the dropper assembly are firmly snapped into place with a strong snap fit to complete the assembly. Bottle body assembly: Assemble the middle ring downward from above the outer bottle, and the middle ring 1 and the outer bottle are firmly snapped into place with a strong snap fit to complete the assembly; among them, for A2 assembly, insert the inner plug downward from above the bottle body assembly, and the inner plug and the middle ring of the bottle body assembly are firmly snapped into place with a strong snap fit to complete the assembly; for A3 assembly, screw the A1 assembly downward from above the A2 assembly, the dropper of the A1 assembly passes through the inner plug of the A2 assembly, and at the same time, the internal thread of the large ring of the A1 assembly and the external thread at the bottle mouth of the middle ring of the A2 assembly are rotated into place to complete the assembly.

[0022] The above-mentioned bottle body is a high-rigidity polymer bottle body, and the high-rigidity polymer material is made of components with the following weight ratios. Example 1: 72 parts of high-density polyethylene, 10 parts of aluminum hydroxide, 5 parts of calcium oxide, 8 parts of glycerol, 3 parts of modified graphene oxide colloid, 1 part of antioxidant, and 1 part of ultraviolet light absorber; it includes the following steps: a) Mix a 0.01M aqueous solution of sodium citrate and silver nitrate evenly in a three-necked flask, add a certain amount of graphene oxide aqueous solution, and then add a certain amount of poly(diallyldimethylammonium chloride) solution with a volume fraction of 40%. For every 100 mg of graphene oxide colloid, the volume fraction of poly(diallyldimethylammonium chloride) solution is 4 ml. Stir magnetically at room temperature for 12 hours, then stir magnetically in an oil bath at 130 °C for 3 hours. Then add sodium citrate as a reducing agent for graphene oxide for the second time. Add 20 mL of triethylamine to the three-necked flask, and dissolve 7 mL of acyl bromide in 20 mL of xylene and add it dropwise within 15 minutes. Graphene oxide is prepared into a modified graphene oxide colloid by stirring with sodium citrate and poly(diallyldimethylammonium chloride) under mild conditions, that is, at 60 °C, for 6 hours; b) Mix the above-mentioned high-density polyethylene, aluminum hydroxide, calcium oxide, glycerol, modified graphene oxide colloid, antioxidant, and ultraviolet light absorber evenly, and at the same time add a compatibilizer PE-b-M, carbon nanotubes, and silicon dioxide, heat and mix evenly in a mixer for 20 minutes, granulate to obtain modified particles, and use a double-layer co-extrusion blow molding device to use the modified particles as the material for making the bottle body. The tubular melt is mixed in the extrusion die of the device and then stretched, blown, and cooled by a blow molding die to obtain the finished product.

[0023] Example 2: 78 parts of high-density polyethylene, 15 parts of aluminum hydroxide, 8 parts of calcium oxide, 9 parts of glycerol, 4 parts of modified graphene oxide colloid, 2 parts of antioxidant, and 1.5 parts of ultraviolet light absorber; including the following steps: a) A 0.25 M aqueous solution of sodium citrate and silver nitrate is mixed evenly in a three-necked flask, a certain amount of graphene oxide aqueous solution is added, and then a certain amount of a 40% by volume solution of poly(diallyldimethylammonium chloride) is added. For every 100 mg of graphene oxide colloid, the volume of the 40% by volume solution of poly(diallyldimethylammonium chloride) is 5 ml. Magnetically stir at room temperature for 14 hours, then magnetically stir in an oil bath at 140 °C for 4 hours. Then, sodium citrate is added for the second time as a reducing agent for graphene oxide. 20 mL of triethylamine is added to the three-necked flask, and 7 mL of acyl bromide is dissolved in 20 mL of xylene and added dropwise within 15 minutes. Graphene oxide is prepared into a modified graphene oxide colloid by stirring with sodium citrate and poly(diallyldimethylammonium chloride) under mild conditions, i.e., 70 °C, for 8 hours; b) The above-mentioned high-density polyethylene, aluminum hydroxide, calcium oxide, glycerol, modified graphene oxide colloid, antioxidant, and ultraviolet light absorber are mixed evenly. At the same time, a compatibilizer PE-b-M, carbon nanotubes, and silica are added, heated and mixed evenly in a mixer for 250 minutes, granulated to obtain modified particles. The modified particles are used as the material for making the bottle body with a double-layer co-extrusion blow molding device. The modified particles are mixed into a tubular melt in the extrusion die of the device. After the tubular melt is stretched, blown, and cooled by a blow molding die, the finished product is obtained.

[0024] Example 3: 84 parts of high-density polyethylene, 20 parts of aluminum hydroxide, 10 parts of calcium oxide, 10 parts of glycerol, 5 parts of modified graphene oxide colloid, 3 parts of antioxidant and 2 parts of ultraviolet light absorber; including the following steps: a) A 0.5M aqueous solution of sodium citrate and silver nitrate is mixed evenly in a three-necked flask, a certain amount of graphene oxide aqueous solution is added, and then a certain amount of a 40% by volume solution of poly(diallyldimethylammonium chloride) is added. For every 100 mg of graphene oxide colloid, the volume of the 40% by volume solution of poly(diallyldimethylammonium chloride) is 5 ml. Magnetically stir at room temperature for 15 hours, then magnetically stir in an oil bath at 150 °C for 5 hours. Then, sodium citrate is added for the second time as a reducing agent for graphene oxide. 20 mL of triethylamine is added to the three-necked flask, and 7 mL of acyl bromide is dissolved in 20 mL of xylene and added dropwise within 15 minutes. Graphene oxide is prepared into a modified graphene oxide colloid by stirring with sodium citrate and poly(diallyldimethylammonium chloride) under mild conditions, that is, 80 °C, for 9 hours; b) The above-mentioned high-density polyethylene, aluminum hydroxide, calcium oxide, glycerol, modified graphene oxide colloid, antioxidant and ultraviolet light absorber are mixed evenly. At the same time, a compatibilizer PE-b-M, carbon nanotubes and silica are added, and heated and mixed evenly in a mixer. The mixing time is 30 minutes, and then granulated to obtain modified particles. The modified particles are used as the material for making the bottle body by using a double-layer co-extrusion blow molding device. The tubular melt is mixed in the extrusion die of the device and then stretched, blown and cooled by a blow molding die to obtain the finished product.

[0025] The above-mentioned antioxidant is one or more of antioxidant A30, antioxidant HS02, antioxidant H3336 or antioxidant H10; the curing agent is selected from tert-butyl peroxybenzoate; the ultraviolet light absorber is one or more of ultraviolet light absorber UV320, ultraviolet light absorber UV380 or ultraviolet light absorber UV670.

[0026] In summary, the dropper is made of a high-rigidity polymer material based on a strong-pressure middle-ring structure. Compared with traditional droppers, this product has the advantages of light weight, low production cost, anti-bending, anti-deformation, moderate selling price, reasonable design, long service life, and conforming to market characteristics. At the same time, after the dropper is made of a high-rigidity polymer material based on a strong-pressure middle-ring structure, the plastic parts of the product are not easily oxidized and aged. After long-term storage or use, the surface color and luster remain as good as new. The difference between this dropper and ordinary droppers is that after using a high-rigidity polymer material based on a strong-pressure middle-ring structure, the connection of each component is more firm, the fit is accurate, the anti-bending and deformation performance is enhanced, the antioxidant performance is enhanced, and the high-rigidity performance is enhanced, which is convenient for users to carry, store and use.

Claims

1. A high-rigidity polymer dropper. At the inner bottom of the outer cover (3) of the dropper, a large ring (6) is provided. One end of the rubber head (2) extends out of the large ring and abuts against the inner bottom of the head cap (1) that extends out of the outer cover. The head cap extends out of the top orifice of the outer cover and is fixed inside the outer cover. The diameter of the cap orifice at the bottom of the head cap is greater than the outer diameter above the cap orifice of the head cap, and the outer diameter of the cap orifice at the bottom of the head cap is limited inside the outer cover. The other end of the rubber head is fixed to the central hole at the top of the large ring. One end of the dropper (4) is sleeved with the rubber head inside the large ring, and the channel inside the dropper communicates with the air cavity at the top of the rubber head. An inner plug (5) is provided at the top ring orifice of the middle ring (7). The other end of the dropper extends into the bottle body (8) through the middle ring and the inner plug. The internal thread of the large ring is connected to the external thread at the top ring orifice of the middle ring, and the bottom ring orifice of the middle ring is buckled and fixed to the top bottle orifice of the bottle body. It is characterized in that The top plug opening of the inner plug (5) is provided with an outward-turned edge (501). Below the outward-turned edge of the inner plug, a snap ring (502) is provided on the outer diameter of the transition cavity. The outward-turned edge of the inner plug fits against the top ring opening of the middle ring (7). At the same time, the snap ring of the inner plug is snap-fitted with the inner diameter snap groove of the top ring opening of the middle ring. Below the transition cavity of the inner plug, there is a dropper section (503) with a diameter smaller than that of the transition cavity. The dropper section is provided with equally spaced hollow holes. The bottom plug opening of the inner plug at the end of the dropper section abuts and fits against the outer diameter of the dropper (4). The circumferential surfaces between the outward-turned edge, the snap ring, and the dropper section of the inner plug gradually decrease to form a stepped surface. Above the ring mouth rib (601) on the outer diameter of the bottom ring opening of the large ring (6), there is a toothed ring rib (602) with a diameter smaller than that of the ring mouth rib. The large ring is snap-fitted and fixed to the cover mouth groove (301) on the inner diameter of the bottom cover mouth of the outer cover (3) through the ring mouth rib on the outer diameter of the bottom ring opening. At the same time, the toothed ring rib of the large ring is inserted and fixed into the positioning groove between the cover mouth blocks (302) on the upper inner wall of the cover mouth groove of the outer cover, and the equally spaced reinforcing ribs (303) on the inner wall of the outer cover above the positioning groove. On one side of the outer diameter of the bottle body (8) below the snap-fitting and fixing position of the bottom ring opening of the middle ring (7) and the top bottle mouth of the bottle body, there is a gear rib (801). When the inner ring groove (702) at the bottom ring opening of the middle ring is snap-fitted and fixed with the outer ring rib (802) at the top bottle mouth of the bottle body, the gear rib of the bottle body meshes with the toothed ring wall (701) inside the middle ring. The inner side slot opening of the inner ring groove of the middle ring is lower than the outer side slot opening. On one side of the gear rib (801) and the outer ring rib (802) of the bottle body (8), there is a positioning groove (803). On one side of the inner ring groove (702) and the toothed ring wall (701) of the middle ring (7), there are positioning ribs. When the positioning groove of the bottle body is inserted into the positioning ribs of the middle ring, the inner ring groove at the bottom ring opening of the middle ring is snap-fitted and fixed with the outer ring rib at the top bottle mouth of the bottle body, and the gear rib of the bottle body meshes with the toothed ring wall inside the middle ring.

2. The high-rigidity polymer dropper according to claim 1, characterized in that An outer ring is provided outside the central hole at the top of the large ring (6). Equally spaced edge strengthening ribs (603) are provided at the end angles between the outer side of the outer ring and the top ring surface of the large ring.

3. The high-rigidity polymer dropper according to claim 1, characterized in that When the top of the rubber head (2) abuts against the inner ring (101) at the inner bottom of the head cap (1), the outer diameter of the air cavity at the top of the rubber head is sleeved into the outer ring (102) at the inner bottom of the head cap. The outer ring at the inner bottom of the head cap is located outside the inner ring. The outer ring of the head cap is higher than the inner ring. The outer diameter of the top of the rubber head is smaller than the inner diameter of the outer ring of the head cap.

4. The high-rigidity polymer dropper according to claim 1, wherein The specific steps for assembling the dropper are as follows: Head cap assembly: Push the head cap upward from below the outer cover so that the head cap fits with the outer cover to complete the assembly; Rubber head assembly: Stretch and assemble the rubber head upward from below the large ring, and the rubber head and the large ring are firmly buckled in place with a strong buckle to complete the assembly; Dropper assembly: Assemble the dropper upward from below the rubber head assembly, and the dropper and the rubber head of the rubber head assembly are firmly buckled in place with a strong buckle to complete the assembly; Among them, for A1 assembly: Assemble the head cap assembly downward from above the dropper assembly, and the outer cover of the head cap assembly and the large ring of the dropper assembly are firmly buckled in place with a strong buckle to complete the assembly; Bottle body assembly: Assemble the middle ring downward from above the outer bottle, and the middle ring and the outer bottle are firmly buckled in place with a strong buckle to complete the assembly; Among them, for A2 assembly: Insert the inner plug downward from above the bottle body assembly, and the inner plug and the middle ring of the bottle body assembly are firmly buckled in place with a strong buckle to complete the assembly; For A3 assembly: Screw the A1 assembly downward from above the A2 assembly. The dropper of the A1 assembly passes through the inner plug of the A2 assembly. At the same time, the internal thread of the large ring of the A1 assembly and the external thread at the bottle mouth of the middle ring of the A2 assembly are rotated into place to complete the assembly.

Images