Pressure-resistant polymer water bottle cap based on three-piece type strong buckle

Abstract

The utility model relates to a pressure-resistant polymer water bottle cap based on a three-piece type strong buckle, which is designed for solving the technical problems that the existing similar products are inconvenient to produce and assemble and difficult to automatically assemble and produce. The water bottle cap comprises a cap piece, an outer cap and a lining, wherein a weighting block is arranged on the outer diameter of the lining in the outer cap; the key points are as follows: one end of the weighting block is limited in a step groove with the outer diameter reduced at the upper end of the lining in the outer cover, the cover sheet is buckled and fixed at a top cover opening of the outer cover, and a cover sheet opening at the bottom of the inner cover sheet of the outer cover is propped against the other end of the weighting block, and the weighting block is clamped and fixed at the outer diameter of the upper end of the lining in the outer cover; the diameter of the upper end face of the top of the cover piece is larger than that of a cover piece opening in the bottom of the cover piece. The upper end of the lining in the outer cover extends out of the top of the weighting block, multiple layers of buckling ribs distributed at equal intervals are arranged on the outer diameter of the extending end of the lining, and the inner diameter of a cover piece opening of the cover piece is connected with the multiple layers of buckling ribs of the lining through multiple layers of buckling grooves distributed at equal intervals.

Description

Technical Field

[0001] The utility model relates to the bottle cap of a cosmetic, and is a pressure-resistant polymer water bottle cap based on a three-piece strong buckle. Background Art

[0002] A bottle cap is a sealing member used to seal containers such as bottles. According to different functions, there are bottle caps with different shapes and different operation methods. For example, the mineral water bottle cap is circular and is screwed, the beverage can bottle cap is annular and is pulled, and the bottle caps of some cosmetics generally adopt an internal and external thread tightening or buckling method. The bottle caps of products such as vacuum bottles in these cosmetics are mainly used to isolate the liquid from the external temperature and external bacteria. In order to improve the comfort when holding and using the bottle cap, some existing bottle caps are provided with a weight structure. For example, the application number disclosed in the Chinese patent document is 201920305204.4, the authorization announcement date is January 31, 2020, and the utility model name is "A perfume bottle cap that can be unscrewed with the palm"; another example is the application number disclosed in the Chinese patent document is 201920305207.8, the application publication date is January 14, 2020, and the invention name is "A perfume bottle cap"; however, the production and assembly of the above products and similar products are relatively inconvenient, and it is difficult to carry out automated assembly production. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the present utility model is to provide a pressure-resistant polymer water bottle cap based on a three-piece strong buckle with an external spring to solve the technical problems that the production and assembly of existing similar products are relatively inconvenient and it is difficult to carry out automated assembly production. The purpose is achieved through the following technical solutions.

[0004] A pressure-resistant polymer water bottle cap based on a three-piece strong buckle, the water bottle cap includes a cover sheet, an outer cover and a lining. The outer diameter of the buckle rib at the bottom orifice of the lining is snap-fitted and fixed to the lower snap groove at the inner diameter of the bottom cover opening of the outer cover. The cover sheet is snap-fitted and fixed to the upper snap rib at the top cover opening of the outer cover. A weight is provided on the outer diameter of the lining inside the outer cover. The key point of the structural design is that one end of the weight is limited in the stepped groove where the outer diameter of the upper end of the lining inside the outer cover is reduced. When the cover sheet is snap-fitted and fixed to the top cover opening of the outer cover, the cover sheet opening at the bottom of the cover sheet inside the outer cover abuts against the other end of the weight. The weight is clamped and fixed to the outer diameter of the upper end of the lining inside the outer cover. The upper end surface of the top of the cover sheet covers the top cover opening of the outer cover, and the diameter of the upper end surface of the top of the cover sheet is larger than the diameter of the cover sheet opening at the bottom of the cover sheet. Thus, while the outer cover, the cover sheet and the lining are snap-fitted and connected into one body, the weight is fixedly arranged inside the outer cover.

[0005] The upper end of the inner lining in the outer cover extends out of the top of the weight block, and the outer diameter of the extended end of the inner lining is provided with multi-layer buckle ribs distributed at equal intervals, and the outer diameter of the cover plate at the cover plate opening is buckled and fixed to the cover plate top cover opening of the outer cover, while the inner diameter of the cover plate at the cover plate opening is connected to the multi-layer buckle ribs of the inner lining through multi-layer buckle grooves distributed at equal intervals. The above is a specific buckling method and structural design of the cover plate and the outer cover, which improves the stability of the two after buckling.

[0006] The outer diameter of the bottom opening of the inner liner is provided with an outer flange, and when the inner liner and the outer cover are buckled, the outer cover is limited to the outer flange of the inner liner. The above structural design is convenient for limiting and being in place during automatic assembly, and forms protection for the bottom cover of the outer cover.

[0007] The inner wall between the upper buckle rib at the top cover opening of the outer cover and the lower buckle groove at the bottom cover opening of the outer cover is provided with equidistantly distributed anti-rotation ribs. When the inner liner and the outer cover are buckled, the positioning ribs on the outer diameter of the inner liner and the anti-rotation ribs in the outer cover are engaged with each other to prevent rotation. The above structure prevents the outer cover and the inner liner from rotating after assembly. Whether the anti-rotation structure is provided has little effect on the use of the water bottle cover in the following buckling mode, and at the same time facilitates the automated production and assembly of the two.

[0008] The inner wall of the step groove of the liner is correspondingly reduced, and the inner wall below the step groove is provided with buckle grooves symmetrically raised in pairs, and strip grooves are respectively provided between the buckle grooves, and the buckle strips and the strip grooves are respectively provided with guide grooves facing the inner wall of the step groove. The above structural design is convenient for buckling with the corresponding protrusion at the bottle mouth of the bottle body, or for setting a straw, dropper or cotton swab in the small circle diameter at the top of the liner for use, and according to the above structural characteristics, the buckle groove, strip groove and guide groove of the liner can also be replaced with internal threads.

[0009] The outer diameter of the outer cover is provided with equidistant and evenly distributed raised anti-skid sharp teeth. The above structure improves the hand feel of the outer cover after holding it, and the texture of its outer diameter is not limited to the above structure design.

[0010] The top of the upper buckle rib of the outer cover is provided with an annular glue dispensing groove, the gap between the annular glue dispensing groove and the outer cover and the cover sheet at the buckling position forms a glue dispensing cavity, and the inner wall of the outer cover is provided with a glue filling surface. The above structure can also be further connected to the outer cover, the weight block and the cover sheet by glue dispensing as needed.

[0011] After the weight block is inserted into the lining, it is pressed into place to the step groove, the outer cover is sleeved over the lining, and the lower buckle groove of the outer cover and the buckle rib of the lining are buckled in cooperation; then the cover plate is pressed downward from the top, and the cover plate and the lining are buckled in cooperation to complete the overall assembly.

[0012] The utility model has reasonable structural design and is convenient to use and produce, especially convenient for automated production and assembly, and convenient to open as a lid of a cosmetic bottle; it is suitable for use as a pressure-resistant polymer water bottle cap based on a three-piece strong buckle, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic cross-sectional view of the explosion state of the present utility model.

[0014] Figure 2 is Figure 1 schematic cross-sectional view of the assembled structure.

[0015] Figure 3 is Figure 2 schematic cross-sectional view of the fixed state at the glue application position, and part A in the figure is framed.

[0016] Figure 4 is Figure 3 enlarged view of part A of

[0017] Reference numerals and names of the drawings: 1, inner lining; 101, snap rib; 102, step groove; 103, turned-out edge; 104, snap groove; 105, strip groove; 2, weight; 3, outer cover; 301, lower snap groove; 302, upper snap rib; 303, anti-rotation rib; 4, cover sheet; 401, cover sheet opening; 402, upper end face. EMBODIMENTS

[0018] Now, with reference to the drawings, the structure and use of the present utility model will be further described. As Figures 1-2 shown, the water bottle cap includes a cover sheet 4, an outer cover 3, a weight 2 and an inner lining 1. The outer diameter of the snap rib 101 at the bottom orifice of the inner lining is snap-fastened and fixed to the inner diameter of the lower snap groove 301 at the bottom cover opening of the outer cover. The cover sheet is snap-fastened and fixed to the upper snap rib 302 at the top cover opening of the outer cover. A weight is provided on the outer diameter of the inner lining inside the outer cover. One end of the weight is limited in the step groove 102 where the outer diameter of the upper end of the inner lining in the outer cover is reduced. When the cover sheet is snap-fastened and fixed to the top cover opening of the outer cover, the cover sheet opening 401 at the bottom of the cover sheet inside the outer cover abuts against the other end of the weight. The weight is clamped and fixed to the outer diameter of the upper end of the inner lining inside the outer cover. The upper end face 402 of the top of the cover sheet covers the top cover opening of the outer cover, and the diameter of the upper end face of the top of the cover sheet is larger than the diameter of the cover sheet opening at the bottom of the cover sheet. The upper end of the inner lining in the outer cover extends out of the top of the weight, and multiple layers of snap ribs are equidistantly distributed on the outer diameter of the extended end of the inner lining. When the outer diameter of the cover sheet opening of the cover sheet is snap-fastened and fixed to the top cover opening of the outer cover, the inner diameter of the cover sheet opening of the cover sheet is connected to the multiple layers of snap ribs of the inner lining through multiple layers of snap grooves distributed at equal intervals. The outer diameter of the bottom orifice of the inner lining is provided with a turned-out edge 103. When the inner lining is snap-fastened to the outer cover, the outer cover is limited by the turned-out edge of the inner lining.

[0019] Meanwhile, anti-rotation ribs 303 are equidistantly distributed on the inner wall between the upper snap ribs at the top cover opening and the lower snap grooves at the bottom cover opening of the outer cover. When the inner liner is snapped onto the outer cover, the positioning ribs on the outer diameter of the inner liner are sleeved with the anti-rotation ribs inside the outer cover to prevent rotation. The inner wall of the step groove of the inner liner is correspondingly reduced. The inner wall below the step groove is provided with snap grooves 104 that protrude symmetrically in pairs, and strip grooves 105 are respectively provided between the snap grooves. The snap strips and the strip grooves are respectively provided with guide grooves facing the inner wall of the step groove. The outer diameter of the outer cover is provided with anti-slip pointed tooth patterns that are equidistantly and uniformly distributed and protrude.

[0020] According to the above structural characteristics, as Figures 3-4 shown, the top of the upper snap rib of the above outer cover is provided with an annular glue dispensing groove, and the gap between the annular glue dispensing groove and the snap joint between the outer cover and the cover sheet forms a glue dispensing cavity. The inner wall of the outer cover is provided with a glue filling surface, and the above components are further fixed by glue dispensing as required.

[0021] According to the above structural characteristics, the specific assembly method of this water bottle cap is as follows: After the weight block is sleeved into the inner liner, it is pressed in place to the step groove. The outer cover is sleeved on the inner liner, and the lower snap groove of the outer cover is cooperatively snapped with the snap ribs of the inner liner; then the cover sheet is pressed down from the top, and the multi-layer snap grooves of the cover sheet are cooperatively snapped with the multi-layer snap ribs of the inner liner to complete the overall assembly. When using this water bottle cap, the inner liner is sleeved onto the protrusion on the outer diameter of the bottle mouth of the corresponding bottle body by means of snap fit.

[0022] The above inner liner is a pressure-resistant polymer inner liner. The composition and weight ratio of the pressure-resistant polymer material of the pressure-resistant polymer inner liner are as follows: Example 1, 50 parts of thermoplastic polyurethane elastomer, 15 parts of light calcium carbonate, 3 parts of composite stabilizer, 0.5 part of coupling agent, 0.5 part of lubricant, 0.5 part of compatibilizer, 0.2 part of antioxidant, 0.1 part of anti-hydrolysis agent; Example 2, 70 parts of thermoplastic polyurethane elastomer, 20 parts of light calcium carbonate, 6 parts of composite stabilizer, 2 parts of coupling agent, 1 part of lubricant, 1 part of compatibilizer, 0.4 part of antioxidant, 0.3 part of anti-hydrolysis agent; Example 3, 85 parts of thermoplastic polyurethane elastomer, 30 parts of light calcium carbonate, 8 parts of composite stabilizer, 4 parts of coupling agent, 3 parts of lubricant, 2 parts of compatibilizer, 0.6 part of antioxidant, 0.5 part of anti-hydrolysis agent.

[0023] The above-mentioned thermoplastic polyurethane elastomer is selected from one or more of polyester-based polyurethane elastomer, polyether-based polyurethane elastomer, aliphatic polyurethane elastomer, and polycarbonate-based polyurethane elastomer; the composite stabilizer is a mixture of yttrium naphthenate, bis(2-ethylhexyl) phosphate, and sulfur, and the mass ratio of yttrium naphthenate, bis(2-ethylhexyl) phosphate, and sulfur is 1:0.1-0.3:2-3; the coupling agent is a titanate coupling agent; the lubricant is one or more mixtures of polypropylene wax, stearic acid, and ethylene bisstearamide (EBS); the compatibilizer is maleic anhydride grafted polypropylene; the antioxidant is selected from one or more of antioxidant 1010, antioxidant 1076, antioxidant 1135, antioxidant 1098, antioxidant 168, and antioxidant 618; the hydrolysis-resistant agent is selected from one or more of bis(2,6-diisopropylphenyl)carbodiimide, carbodiimide, and polycarbodiimide.

[0024] The above-mentioned composite stabilizer, coupling agent, lubricant, compatibilizer, antioxidant, and hydrolysis-resistant agent are added to a transparent reaction kettle for dissolution, and after being kneaded at a temperature of 160-190 °C for 15-30 min, they are added to a twin-screw extruder together with the thermoplastic polyurethane elastomer and light calcium carbonate. The main screw rotation speed of the twin-screw extruder is 60-120 revolutions / min, preferably 90 revolutions / min; the feeding machine rotation speed is 3-8 revolutions / min, preferably 5 revolutions / min; the temperature of the first zone in the barrel is 350 °C, the temperatures of the second and third zones are 360 °C, and the temperatures of the fourth to eighth zones are set at 370 °C. The materials are melted, extruded, and pelletized in the twin-screw extruder to obtain the pressure-resistant polymer material.

Claims

1. A pressure-resistant polymer water bottle cap based on a three-piece strong buckle, the water bottle cap comprising a cover sheet (4), an outer cover (3) and an inner liner (1), the outer diameter of the buckle rib (101) at the bottom opening of the inner liner is buckled and fixed to the lower buckle groove (301) at the inner diameter of the bottom cover opening of the outer cover, the cover sheet is buckled and fixed to the upper buckle rib (302) at the top cover opening of the outer cover, and a weight block (2) is provided at the outer diameter of the inner liner in the outer cover; characterized in that One end of the weight block (2) is limited to a stepped groove (102) in the outer cover (3) where the outer diameter of the upper end of the lining (1) is reduced. The cover sheet (4) is fastened and fixed to the top cover opening of the outer cover. At the same time, the cover sheet opening (401) at the bottom of the inner cover sheet of the outer cover abuts against the other end of the weight block. The weight block is clamped and fixed to the outer diameter of the upper end of the lining in the outer cover. The upper end surface (402) of the top of the cover sheet covers the top cover opening of the outer cover. The diameter of the upper end surface of the top of the cover sheet is larger than the diameter of the cover sheet opening at the bottom of the cover sheet. The lining is a pressure-resistant polymer lining.

2. According to claim 1, the pressure-resistant polymer water bottle cap based on the three-piece strong buckle is characterized in that The upper end of the inner lining (1) in the outer cover (3) extends out of the top of the weight block (2), and the outer diameter of the extended end of the inner lining is provided with multi-layer buckle ribs distributed at equal intervals. The outer diameter of the cover plate opening (401) of the cover plate (4) is buckled and fixed to the top cover opening of the outer cover (3), and the inner diameter of the cover plate opening of the cover plate is connected to the multi-layer buckle ribs of the inner lining through multi-layer buckle grooves distributed at equal intervals.

3. According to claim 1, the pressure-resistant polymer water bottle cap based on the three-piece strong buckle is characterized in that An outer flange (103) is provided on the outer diameter of the bottom opening of the inner liner (1); when the inner liner and the outer cover (3) are buckled together, the outer cover is located at the outer flange of the inner liner.

4. The pressure-resistant polymer water bottle cap based on the three-piece strong buckle according to claim 1 is characterized in that The inner wall between the upper buckle rib (302) at the top cover opening of the outer cover (3) and the lower buckle groove (301) at the bottom cover opening is provided with equidistantly distributed anti-rotation ribs (303), and when the inner liner (1) is buckled with the outer cover, the positioning ribs on the outer diameter of the inner liner are engaged with the anti-rotation ribs in the outer cover to prevent rotation.

5. The pressure-resistant polymer water bottle cap based on the three-piece strong buckle according to claim 1 is characterized in that The inner wall of the step groove (102) of the lining (1) is correspondingly narrowed, and the inner wall below the step groove is provided with two symmetrically raised buckle grooves (104), and strip grooves (105) are respectively provided between the buckle grooves, and the buckle strips and the strip grooves are respectively provided with guide grooves facing the inner wall of the step groove.

6. The pressure-resistant polymer water bottle cap based on the three-piece strong buckle according to claim 1 is characterized in that The outer diameter of the outer cover (3) is provided with equidistant, evenly distributed and raised anti-slip sharp tooth patterns.

7. The pressure-resistant polymer water bottle cap based on the three-piece strong buckle according to claim 1 is characterized in that An annular glue dispensing groove is provided at the top of the upper buckle rib (302) of the outer cover (3), and a gap between the annular glue dispensing groove and the outer cover and the cover sheet (4) at the buckling position forms a glue dispensing cavity, and a glue filling surface is provided on the inner wall of the outer cover.

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