Liquid filling valve structure for spray bottles

Abstract

[Problem] To provide a spray bottle filling valve structure that prevents liquid leakage during and after filling, smoothly discharges internal air to improve filling efficiency, and offers excellent assembly and production efficiency. [Solution] The liquid filling valve structure for a spray bottle according to the present invention comprises a hollow bottle body and a spray head assembly and a tail valve assembly attached to both the upper and lower ends of the bottle body. The tail valve assembly includes a tail cap, a piston, a stopper washer, and an upper seal ring. The upper seal ring is fitted inside the lower end of the bottle body and works in cooperation with the piston to seal the bottle body. The stopper washer is positioned below the upper seal ring, and the piston is movably provided inside the tail cap. The piston extends into the bottle body, sequentially passing through the stopper washer and the upper seal ring, and moves upward during filling, allowing liquid to be injected into the bottle body. In addition, the bottle body is provided with an exhaust hole, which allows internal air to be quickly discharged during filling.

Description

Technical Field

[0001] The present invention relates to the technical field of spray bottles, and particularly to a liquid filling valve structure for a spray bottle.

Background Art

[0002] Currently, most perfume bottles in the market adopt the method of filling perfume from above, and there are only a few perfume bottles that can be filled from below. However, when filling perfume from below, the perfume bottle is required to have good sealing performance to ensure that perfume does not leak during and after filling, and at the same time, it is necessary to timely discharge the internal air during filling so that the perfume can be smoothly filled.

[0003] However, in the conventional liquid filling type spray bottle, the internal liquid filling structure is complex, and the manufacturing and assembly processes are very cumbersome, so the assembly efficiency is low, and there is a problem that the production efficiency of the product is reduced. In addition, there is also a problem that liquid leakage easily occurs at the lower end of the bottle body, which has an adverse impact on the user experience.

[0004] Therefore, research on a new technical solution to solve the above problems is required.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In view of the above circumstances, the main object of the present invention is to provide a liquid filling valve structure for a spray bottle in order to eliminate the drawbacks existing in the prior art.

Means for Solving the Problems

[0006] To achieve the above object, the present invention adopts the following technical means.

[0007] The liquid filling valve structure for a spray bottle according to the present invention includes a hollow bottle body, and a spray head assembly and a tail valve assembly attached to the upper and lower ends of the bottle body.

[0008] An exhaust port is provided at the lower inner end of the bottle body, and an exhaust pipe is inserted into the exhaust port, extending upward to the upper end of the bottle body. The tail valve assembly includes a tail cap, a piston, a stopper washer, and an upper seal ring. The upper seal ring is fitted into the lower inner end of the bottle body and works in cooperation with the piston to form a sealed state of the bottle body. The stopper washer is positioned below the upper seal ring. The piston is movably provided inside the tail cap and extends into the bottle body, passing through the stopper washer and upper seal ring in sequence. During filling, the piston moves upward to fill the bottle body with liquid.

[0009] Preferably, a liquid-filling seal ring is further provided between the piston and the tail cap. The liquid-filling seal ring has a conical structure with a larger upper part and a smaller lower part. Its upper end surface is in close contact with the lower end surface of the piston, and its lower conical surface is in contact with the lower conical surface inside the tail cap to form a sealed state. In addition, an annular projection is provided on the lower conical surface of the liquid-filling seal ring to enhance the sealing effect with the lower conical surface inside the tail cap.

[0010] Preferably, the liquid filling seal ring and the piston are manufactured by integral molding technology. A liquid injection groove extending vertically is provided at the center of the lower end of the liquid filling seal ring, and this injection groove extends into the interior of the piston. Lateral liquid advance grooves extending to the left and right sides and penetrating to the outside of the piston are provided at the ends of the liquid injection groove, allowing liquid to be filled through the liquid injection groove and then flowed into the bottle body through the lateral liquid advance grooves.

[0011] Preferably, the piston is provided with positioning vanes that protrude outward, and these positioning vanes are spaced apart on the lower outer circumferential surface of the piston.

[0012] Preferably, the piston is further provided with a return spring. The return spring is fitted onto the piston, with its lower end in contact with the piston's positioning vane and its upper end in contact with the inner end surface of a stopper washer. The return spring always exerts a downward pushing force, returning the piston to its original position after filling and preventing leakage.

[0013] Preferably, the inner end of the stopper washer is formed in a stepped manner from bottom to top, and a protruding stopper projection is provided on the stepped inner end surface. The stopper projection gradually extends outward from bottom to top, and the upper end of the return spring abuts against the stopper projection. The stopper washer is also provided with a through hole through which the piston passes.

[0014] Preferably, a further protruding shoulder portion is provided between the stopper washer and the upper seal ring. The shoulder portions are arranged in an annular pattern and form an exhaust groove between the stopper washer and the upper seal ring.

[0015] Preferably, the shoulder portion is arranged in an annular pattern on the upper end surface of the stopper washer and is manufactured integrally with the stopper washer. The upper seal ring has a conical structure that is larger at the bottom and smaller at the top, gradually contracting inward.

[0016] Preferably, the shoulder portion is arranged annularly at the lower end of the upper seal ring and extends outward, and is manufactured integrally with the upper seal ring. A gap is formed between the side end of the upper seal ring and the lower inner end surface of the bottle body for air to flow out.

[0017] Preferably, the shoulder portion is arranged in an annular pattern on the upper end surface of the stopper washer and is manufactured by integral molding with the stopper washer. The lower outer end of the upper seal ring is provided with a corrugated annular structure, which forms a gap between it and the lower inner end surface of the bottle body, allowing air inside the bottle body to be discharged to the outside. [Effects of the Invention]

[0018] According to the present invention, the spray bottle is configured to be assembled by dividing it into three parts, and a plurality of sealing structures are provided in the tail valve assembly of the tail part, so that leakage of the internal liquid can be effectively prevented during storage and filling of the liquid. In addition, by providing an exhaust hole in the bottle body, the internal air can be discharged to the outside in a timely manner, and the filling efficiency can be improved. Furthermore, the tail valve assembly has a simple structure and can be assembled quickly, which can increase the assembly production efficiency and reduce the manufacturing cost of the enterprise.

Brief Description of the Drawings

[0019] To more clearly explain the technical solution according to an embodiment of the present invention, the accompanying drawings used in the description of the embodiment or the prior art will be briefly described below. It should be noted that the accompanying drawings shown below only illustrate some embodiments of the present invention, and those of ordinary skill in the art can obtain other accompanying drawings based on these accompanying drawings without creative effort.

[0020] [Figure 1] Schematic diagram of the overall structure according to the first embodiment of the present invention [Figure 2] Schematic diagram of the disassembled structure according to the first embodiment of the present invention [Figure 3] Schematic diagram of the structure of the tail valve assembly according to the first embodiment of the present invention [Figure 4] Schematic diagram of the full cross-sectional structure according to the first embodiment of the present invention [Figure 5] Schematic diagram of the overall structure according to the second embodiment of the present invention [Figure 6] Schematic diagram of the disassembled structure according to the second embodiment of the present invention [Figure 7] Schematic diagram of the structure of the tail valve assembly according to the second embodiment of the present invention [Figure 8] Schematic diagram of the full cross-sectional structure according to the second embodiment of the present invention [Figure 9] Schematic diagram of the overall structure according to the third embodiment of the present invention [Figure 10] Schematic diagram of the disassembled structure according to the third embodiment of the present invention [Figure 11]Schematic structural diagram of the tail valve assembly according to the third embodiment of the present invention [Figure 12] Schematic diagram of the full-section structure according to the third embodiment of the present invention

Mode for Carrying Out the Invention

[0021] In order to more clearly illustrate the technical problems to be solved, the technical solutions and the beneficial effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the specific embodiments described below are for explaining the present invention and do not limit the present invention.

[0022] In addition, when a member is described as being "fixed to" or "provided on" another member, that member includes not only the case where it is directly fixed to the other member but also the case where it is indirectly fixed. Also, when a member is described as being "connected to" another member, it includes both the case of direct connection and the case of indirect connection. Furthermore, terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "upper end", "lower end", "inner side", "outer side", etc. are based on the directions or positional relationships shown in the accompanying drawings and are used to facilitate the description of the present invention, and do not mean that the device or member has a specific direction.

[0023] Also, terms such as "first", "second", etc. are used only for the purpose of distinction in description and do not limit relative importance or quantity. In this specification, "a plurality" means two or more unless otherwise specified.

[0024] To make the object, technical configuration and its effects of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] <First Embodiment> Referring to Figures 1 to 4, the liquid filling valve structure of the spray bottle according to the first embodiment will be described. The liquid filling valve structure of the spray bottle according to this embodiment comprises a hollow bottle body 100 and a spray head assembly 200 and a tail valve assembly 300 attached to the upper and lower ends of the bottle body 100. Both the spray head assembly 200 and the tail valve assembly 300 are detachably attached to the bottle body 100. The spray head assembly 200 includes a spray pump and a suction pipe connected to the spray pump and extending into the bottle body 100, and sucks up the liquid inside the bottle body 100 and sprays it. In addition, an exhaust hole 110 is provided at the lower inner end of the bottle body 100, and an exhaust pipe 120 is inserted into the exhaust hole 110, and the exhaust pipe 120 extends upward to the upper end of the bottle body 100. This allows air from the upper part of the bottle body 100 to be discharged when filling, making it possible to quickly fill with liquid such as perfume. The tail valve assembly 300 includes a tail cap 310, a piston 320, a stopper washer 330, and an upper seal ring 340. The upper seal ring 340 is fitted into the lower inner end of the bottle body 100 and works in cooperation with the piston 320 to form a sealed state of the bottle body 100, preventing liquid leakage. The stopper washer 330 is located below the upper seal ring 340. The piston 320 is movably mounted inside the tail cap 310 and extends into the bottle body 100, passing through the stopper washer 330 and the upper seal ring 340 in sequence. This allows the piston 320 to be moved upward during filling, thereby injecting liquid into the bottle body 100.

[0026] In this embodiment, a liquid sealing ring 350 is further provided between the piston 320 and the tail cap 310. The liquid sealing ring 350 has a conical structure with a larger diameter at the upper end and a smaller diameter at the lower end. Its upper end surface is in close contact with the lower end surface of the piston 320, while its lower end conical surface abuts against a conical surface formed on the inner lower end of the tail cap 310, forming a sealed state. As a result, the liquid sealing ring 350 is always pressed against the inner lower end conical surface of the tail cap 310 under normal conditions, ensuring a sealed state that prevents leakage of liquid and air. Furthermore, an annular protrusion is formed on the lower end conical surface of the liquid sealing ring 350 to further improve the sealing performance with the inner lower end conical surface of the tail cap 310.

[0027] Specifically, the liquid filling seal ring 350 used in this embodiment is formed integrally with the piston 320 by a molding process, and a liquid injection groove 360 ​​extending along its axial direction is formed in the center of the lower end of the liquid filling seal ring 350. The liquid injection groove 360 ​​extends into the interior of the piston 320, and further, at the lower end of the liquid injection groove 360, there are lateral liquid advance grooves 370 that extend to both the left and right sides and penetrate to the outside of the piston 320. With this configuration, the user can inject liquid into the bottle body 100 through the liquid injection groove 360, and the liquid first flows within the liquid injection groove 360, and then flows into the interior of the bottle body 100 through the lateral liquid advance grooves 370 on both the left and right sides, thereby achieving smooth liquid filling.

[0028] Furthermore, in the normal non-filled state, the lateral fluid advance grooves 370 formed on both the left and right sides of the piston 320 contact the inner wall surface of the upper seal ring 340, creating a sealed state. On the other hand, when filling with a liquid such as perfume, pushing the piston 320 upward causes the lateral fluid advance grooves 370 to separate from the upper seal ring 340 and be exposed inside the bottle body 100, thereby allowing the liquid to flow into and be stored inside the bottle body 100.

[0029] In this embodiment, the piston 320 is further provided with outwardly projecting positioning vanes 321 on its outer circumference, and these positioning vanes 321 are arranged at intervals on the lower outer surface of the piston 320.

[0030] Furthermore, the piston 320 is equipped with a return spring 380, which is mounted on the outer circumference of the piston 320. Its lower end abuts against the positioning vane 321, and its upper end abuts against the inner end surface of the stopper washer 330. The return spring 380 always has an elastic force that biases downward, so that the piston 320, which is pushed upward during filling, automatically returns to its original position after filling is complete. As a result, the filling seal ring 350, which is integrally formed with the piston 320, quickly re-fits to the inner lower end surface of the tail cap 310, reliably preventing leakage of the internal liquid and causing no inconvenience to the user.

[0031] Furthermore, the inner end of the stopper washer 330 is formed in a stepped structure from bottom to top, and a protruding positioning rib is provided on this stepped inner end surface. The positioning rib has a shape that gradually protrudes outward from bottom to top, and the upper end of the return spring 380 abuts against this positioning rib, thereby stably maintaining the spring position. In addition, a through hole 331 is formed in the central part of the stopper washer 330 for the piston 320 to pass through, and the piston 320 extends into the interior of the bottle body 100 through this through hole 331.

[0032] In this embodiment, a protruding shoulder portion 390 is further provided between the stopper washer 330 and the upper seal ring 340. The shoulder portion 390 is arranged in an annular shape between the stopper washer 330 and the upper seal ring 340, forming an exhaust groove between them. As a result, the air discharged downward through the exhaust hole 110 is guided further downward through the exhaust groove and finally discharged to the outside of the bottle body 100.

[0033] Specifically, the shoulder portion 390 is arranged in an annular pattern on the upper end surface of the stopper washer 330 and is formed integrally with the stopper washer 330 by a molding process. This configuration ensures an exhaust space between the stopper washer 330 and the upper seal ring 340 positioned above it, allowing air to flow smoothly.

[0034] Furthermore, the upper seal ring 340 has an inward-facing conical structure with a larger diameter at the lower end and a smaller diameter at the upper end, and in addition, a corrugated arc-shaped structure is formed in an annular shape on the inner circumferential surface of the lower end of the bottle body 100.

[0035] This corrugated arc structure contacts the outer circumference of the upper seal ring 340, creating a minute gap between the upper seal ring 340 and the bottle body 100, allowing air to flow.

[0036] <Second Example> Referring to Figures 5 to 8, the liquid filling valve structure of the spray bottle according to the second embodiment will be described. The liquid filling valve structure of the spray bottle according to the second embodiment comprises a hollow bottle body 100 and a spray head assembly 200 and a tail valve assembly 300 that are detachably attached to both the upper and lower ends of the bottle body 100. The spray head assembly 200 has a spray pump and a suction pipe that extends into the inside of the bottle body 100, and sucks up the liquid inside the bottle body 100 to spray it. In addition, an exhaust hole 110 is provided at the lower inner end of the bottle body 100, and an exhaust pipe 120 is inserted into the exhaust hole 110 and extends to the upper end of the bottle body 100, enabling rapid filling of perfume liquid by expelling upper air during filling. The tail valve assembly 300 includes a tail cap 310, a piston 320, a stopper washer 330, and an upper seal ring 340. The upper seal ring 340 is fitted inside the lower end of the bottle body 100 to form a seal and prevent leakage of liquid. The stopper washer 330 is positioned below the upper seal ring 340, and the piston 320 is movably mounted within the tail cap 310, extending through the stopper washer 330 and the upper seal ring 340 into the interior of the bottle body 100. This allows liquid to be injected into the bottle body 100 by moving the piston 320 upward.

[0037] In this embodiment as well, a liquid-filling seal ring 350 is provided between the piston 320 and the tail cap 310. The liquid-filling seal ring 350 has a conical structure that is larger at the top and smaller at the bottom. Its upper end surface is in close contact with the lower end surface of the piston 320, and its lower end conical surface abuts against the inner lower end conical surface of the tail cap 310, forming a sealed state. Furthermore, an annular protrusion is provided on the lower end conical surface of the liquid-filling seal ring 350 to enhance the sealing performance.

[0038] Specifically, the liquid filling seal ring 350 is formed integrally with the piston 320 by a molding process. A liquid injection groove 360 ​​is formed in the center of the lower end of the liquid filling seal ring 350, extending along its axial direction, and this injection groove 360 ​​extends into the interior of the piston 320. Furthermore, a lateral liquid advance groove 370 is formed at the lower end of the liquid injection groove 360, extending to both the left and right sides and penetrating to the outside of the piston 320. With this configuration, the user can inject liquid into the bottle body 100 via the liquid injection groove 360, and the liquid first flows within the liquid injection groove 360 ​​before being guided into the interior of the bottle body 100 through the lateral liquid advance grooves 370 on both the left and right sides, thereby achieving smooth liquid filling.

[0039] Furthermore, in the normal non-filled state, the lateral fluid advance grooves 370 formed on both the left and right sides of the piston 320 contact the inner circumferential side wall of the upper seal ring 340, creating a sealed state. On the other hand, when filling with a liquid such as perfume, the piston 320 is pushed upward, causing the lateral fluid advance grooves 370 to separate from the upper seal ring 340 and be exposed inside the bottle body 100, thereby allowing the liquid to flow into and be stored inside the bottle body 100.

[0040] In this embodiment, the outer circumference of the piston 320 is further provided with positioning vanes 321 that protrude outward, and these positioning vanes 321 are arranged at circumferential intervals on the lower outer surface of the piston 320.

[0041] Furthermore, the piston 320 is equipped with a return spring 380, which is mounted on the outer circumference of the piston 320. The lower end of the return spring 380 abuts against the positioning vane 321, and the upper end abuts against the inner end surface of the stopper washer 330. This return spring 380 has an elastic force that constantly biases downward, and the piston 320, which is pushed upward during filling, automatically returns to its original position after filling is complete due to the biasing force of the return spring 380. As a result, the filling seal ring 350, which is integrally formed with the piston 320, quickly re-fits to the inner lower end surface of the tail cap 310, reliably preventing leakage of the internal liquid and causing no inconvenience to the user.

[0042] Furthermore, the inner end of the stopper washer 330 is formed in a stepped shape from bottom to top, and a protruding positioning rib is provided on this stepped inner end surface. The positioning rib has a shape that gradually protrudes outward from bottom to top, and the upper end of the return spring 380 abuts against this positioning rib, thereby stably maintaining the position of the return spring 380. In addition, a through hole 331 is formed in the central part of the stopper washer 330 for the piston 320 to pass through, and the piston 320 extends into the interior of the bottle body 100 through the through hole 331.

[0043] In this embodiment, a shoulder portion 390 is further provided that protrudes between the stopper washer 330 and the upper seal ring 340. The shoulder portion 390 is arranged in an annular shape between the stopper washer 330 and the upper seal ring 340, forming an exhaust groove between them. As a result, the air discharged downward through the exhaust hole 110 is guided further downward through the exhaust groove and finally discharged to the outside of the bottle body 100.

[0044] Specifically, the shoulder portion 390 is arranged in an annular manner at the lower end of the upper seal ring 340 and is formed to protrude outward, and is formed integrally with the upper seal ring 340 by a molding process. In the assembled state, the lower end and outer peripheral end of the upper seal ring 340 face the stopper washer 330 and the inner circumferential surface of the lower end of the bottle body 100, respectively, thereby creating a gap for air discharge. As a result, air inside the bottle body 100 is quickly discharged to the outside, and the liquid filling process is carried out smoothly.

[0045] <Third Example> Referring to Figures 9 to 12, the filling valve structure of the spray bottle according to the third embodiment will be described. The filling valve structure of the spray bottle according to the third embodiment comprises a hollow bottle body 100 and a spray head assembly 200 and a tail valve assembly 300 that are detachably attached to both the upper and lower ends of the bottle body 100. The spray head assembly 200 has a spray pump and a suction pipe that extends into the inside of the bottle body 100, and sucks up the liquid inside the bottle body 100 to spray it. In addition, an exhaust hole 110 is provided at the lower inner end of the bottle body 100, and an exhaust pipe 120 is inserted into the exhaust hole 110 and extends to the upper end of the bottle body 100, enabling rapid filling of perfume liquid by expelling upper air during filling. The tail valve assembly 300 includes a tail cap 310, a piston 320, a stopper washer 330, and an upper seal ring 340. The upper seal ring 340 is fitted inside the lower end of the bottle body 100 to form a seal and prevent leakage of liquid. The stopper washer 330 is positioned below the upper seal ring 340, and the piston 320 is movably mounted within the tail cap 310, extending through the stopper washer 330 and the upper seal ring 340 into the interior of the bottle body 100. This allows liquid to be injected into the bottle body 100 by moving the piston 320 upward.

[0046] In this embodiment as well, a liquid sealing ring 350 is provided between the piston 320 and the tail cap 310. The liquid sealing ring 350 has a conical structure with a larger diameter at the upper end and a smaller diameter at the lower end. The upper end surface of the liquid sealing ring 350 is in close contact with the lower end surface of the piston 320, and the lower conical surface abuts against the inner lower conical surface of the tail cap 310, forming a sealed state. As a result, under normal conditions, the liquid sealing ring 350 is always pressed against the inner lower end surface of the tail cap 310, preventing leakage of liquid and air.

[0047] Furthermore, annular protrusions are formed on the lower conical surface to improve sealing performance.

[0048] Furthermore, the inner end of the stopper washer 330 is formed in a stepped shape from bottom to top, and a protruding positioning rib is provided on the stepped inner end surface. This positioning rib has a shape that gradually protrudes outward from bottom to top, so that the upper end of the return spring 380 reliably contacts the positioning rib formed on the inner end of the stopper washer 330. In addition, the stopper washer 330 has a through hole 331 through which the piston 320 passes, and the piston 320 passes through the central part of the stopper washer 330 via the through hole 331 and extends into the inside of the bottle body 100.

[0049] In this embodiment, a protruding shoulder portion 390 is further provided between the stopper washer 330 and the upper seal ring 340. The shoulder portion 390 is arranged in an annular shape between the stopper washer 330 and the upper seal ring 340, forming an exhaust groove between them. As a result, the air discharged downward through the exhaust hole 110 is guided further downward through the exhaust groove and finally discharged to the outside of the bottle body 100.

[0050] Specifically, the shoulder portion 390 is arranged in an annular pattern on the upper end surface of the stopper washer 330 and is formed integrally with the stopper washer 330 by a molding process. Furthermore, a corrugated annular structure is formed on the lower outer peripheral end of the upper seal ring 340, and a gap is formed between the upper seal ring 340 and the lower inner peripheral surface of the bottle body 100, allowing air inside the bottle body 100 to flow out smoothly to the outside.

[0051] Although preferred embodiments of the present invention have been described above, these are for the purpose of illustrating the technical idea of ​​the present invention and do not in any way limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions or improvements, and other specific embodiments that can be conceived by an expert in the art without requiring creative effort, based on the spirit and principles of the present invention, are all included within the scope of protection of the present invention. [Explanation of symbols]

[0052] 100: Bottle body 110: Exhaust port 120: Exhaust pipe 200: Spray head assembly 300: Tail valve assembly 310: Tail cap 320: Piston 321: Positioning wing 330: Stopper washer 331:Through hole 340: Upper sealing ring 350: Filling fluid sealing ring 360: Injection groove 370: Lateral fluid advance groove 380: Recovery spring 390: Protruding shoulder

Claims

1. It comprises a hollow bottle body and a spray head assembly and a tail valve assembly attached to both the upper and lower ends of the bottle body, An exhaust hole is provided at the lower inner end of the bottle body, and an exhaust pipe is inserted into the exhaust hole and extends to the upper end of the bottle body. A filling valve structure for a spray bottle, The tail valve assembly includes a tail cap, a piston, a stopper washer, and an upper seal ring. The upper sealing ring is fitted inside the lower end of the bottle body and works in cooperation with the piston to seal the bottle body. The stopper washer is positioned below the upper seal ring. The piston is movably provided inside the tail cap and extends into the bottle body, sequentially passing through the stopper washer and the upper seal ring. The device is characterized in that, when the piston moves upward during filling, it is possible to inject liquid into the bottle. The filling valve structure of a spray bottle.

2. A filling fluid seal ring is further provided between the piston and the tail cap. The aforementioned liquid-filling seal ring has a conical structure with a larger diameter at the upper end and a smaller diameter at the lower end. The upper end surface of the fluid sealing ring abuts against the lower end surface of the piston. The lower conical surface of the liquid-filling seal ring contacts the inner lower conical surface of the tail cap to form a sealed state. The lower conical surface is provided with annular protrusions to enhance the sealing performance with the inner lower conical surface of the tail cap. The liquid filling valve structure for a spray bottle according to claim 1.

3. The aforementioned liquid-filling seal ring is formed integrally with the piston, A liquid injection groove extending along its axial direction is formed in the lower central portion of the aforementioned liquid-filling seal ring. The aforementioned fluid injection groove extends into the interior of the piston, At the lower end of the aforementioned fluid injection groove, a lateral fluid advance groove is formed that extends in both left and right directions and penetrates to the outside of the piston. The liquid injected through the injection groove is configured to flow into the bottle through the lateral flow groove. The liquid filling valve structure for a spray bottle according to claim 2.

4. The outer circumference of the piston is provided with positioning vanes that protrude outward. The positioning vanes are arranged at intervals on the lower outer surface of the piston. The liquid filling valve structure for a spray bottle according to claim 1.

5. The piston is further provided with a return spring. The return spring is mounted on the outer circumference of the piston. The lower end of the return spring abuts against the positioning wing, and the upper end abuts against the inner end surface of the stopper washer. The return spring always has an elastic force that biases downward, After filling with fluid, the piston is returned to its original position to prevent fluid leakage. The liquid filling valve structure for a spray bottle according to claim 4.

6. The inner end of the stopper washer is formed in a stepped shape from bottom to top. The stepped inner end surface is provided with a protruding positioning rib. The positioning rib has a shape that gradually protrudes outward from below upward, The upper end of the return spring is in contact with the positioning rib. The stopper washer has a through hole formed therein for the piston to pass through. The liquid filling valve structure for a spray bottle according to claim 5.

7. A protruding shoulder is provided between the stopper washer and the upper seal ring. The shoulder portion is arranged in an annular manner between the stopper washer and the upper seal ring. An exhaust groove is formed between the two. The liquid filling valve structure for a spray bottle according to claim 1.

8. The shoulder portion is arranged in an annular pattern on the upper end surface of the stopper washer. The shoulder portion and the stopper washer are formed by integral molding. The upper seal ring has a conical structure that gradually decreases in diameter towards the inside, with a larger diameter at the lower end and a smaller diameter at the upper end. The liquid filling valve structure for a spray bottle according to claim 7.

9. The shoulder portion is arranged in an annular manner at the lower end of the upper seal ring and extends outward. The shoulder portion and the upper seal ring are formed by integral molding. A gap for air discharge is formed between the side end of the upper sealing ring and the inner circumferential surface of the lower end of the bottle body. The liquid filling valve structure for a spray bottle according to claim 7.

10. The shoulder portion is arranged in an annular pattern on the upper end surface of the stopper washer. The shoulder portion and the stopper washer are formed by integral molding. A corrugated annular structure is provided at the lower outer peripheral end of the upper seal ring. A gap is formed between the corrugated annular structure and the inner circumferential surface of the lower end of the bottle body. The air inside the bottle is discharged to the outside through the gap. The liquid filling valve structure for a spray bottle according to claim 7.

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