Filling valve structure for refillable spray bottle

Abstract

A filling valve structure for a refillable spray bottle, comprising a bottle body (100) and a spray head assembly (300) arranged on the bottle body (100), wherein a partition plate (130) is provided at the lower end inside the bottle body (100) for dividing the bottle body (100) into an upper cavity (110) and a lower cavity (120), and the center of the partition plate (130) is through-shaped for a liquid to flow into; and further comprising a tail valve assembly (200) arranged in the lower cavity (120), wherein the tail valve assembly (200) comprises a tail cover (210) and a piston (220), the piston (220) is placed in the tail cover (210) and is provided with a liquid injection hole (221) and a vertically-through exhaust hole (222), and the tail cover (210) is provided with a liquid injection port (211) and an exhaust plunger (212) respectively corresponding to the liquid injection hole (221) and the exhaust hole (222). A plurality of liquid-stop sealing structures with different structures are provided on the tail valve assembly (200). The filling valve has a simple structure, and is easy to use and quick to assemble; the exhaust hole provided on the piston is convenient for exhausting air in the bottle body when filling; and the liquid-stop sealing structures prevent internal liquid leakage and have good sealing performance.

Description

A filling valve structure for a refillable spray bottle Technical Field

[0001] The utility model relates to the technical field of spray bottles, in particular to a filling valve structure capable of filling a spray bottle. Background Art

[0002] Most people in society will spray some perfume before going out or before a date to increase their personal charm. Due to long-term spraying, the stock in the perfume bottle is easily consumed, and it is necessary to buy a new perfume set or refill the existing perfume bottle with liquid for reuse.

[0003] Currently, most perfume bottles on the market are filled from the top, and only a few can be filled from the bottom. However, when filling perfume from the bottom, the perfume bottle needs to have good sealing performance to ensure that the perfume will not leak during and after filling, and the air inside can be discharged in time during filling to ensure smooth filling of the perfume.

[0004] However, the perfume bottles on the market that are filled from the bottom have very complicated filling and exhaust structures, which are very inconvenient during production and assembly, and have low reliability and high production costs.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems.

[0006] Utility Model Content

[0007] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a filling valve structure for a refillable spray bottle.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a filling valve structure for a refillable spray bottle, comprising a bottle body and a spray head assembly arranged on the bottle body, a partition is provided at the lower end of the bottle body for dividing the bottle body into an upper cavity and a lower cavity, the center of the partition is through-shaped for liquid to flow in, and also includes a tail valve assembly arranged in the lower cavity of the bottle body, the tail valve assembly includes a tail cover and a piston, the piston is placed in the tail cover and is provided with a liquid injection hole and an exhaust hole that passes through from top to bottom, the tail cover is provided with a liquid injection port and an exhaust plunger corresponding to the liquid injection hole and exhaust hole on the piston, the exhaust plunger extends into the exhaust hole to prevent the liquid in the bottle from leaking.

[0009] As a preferred solution, a return spring is provided between the piston and the partition of the bottle body, one end of the return spring rests on the piston, and the other end rests on the lower end surface of the partition. The return spring always has a downward force to make the lower end surface of the piston rest against the inner end surface of the tail cover.

[0010] As a preferred solution, the exhaust hole is arranged in a stepped shape with a small top and a large bottom, and the shape of the exhaust plunger is arranged to be a structure with a small top and a large bottom and adapted to the structure of the exhaust hole. When the piston is static, its lower end face is in conflict with the inner end face of the tail cover, and the exhaust plunger is inserted into the exhaust hole to prevent the liquid in the bottle from leaking outward; when filling with liquid, the piston is pushed upward, the exhaust plunger is away from the exhaust hole, and the compressed air generated by the filling of the liquid in the bottle is discharged outward from the exhaust hole.

[0011] As a preferred solution, an exhaust pipe is further provided in the bottle body, one end of the exhaust pipe is inserted into the exhaust hole of the piston, and the other end extends upward to the upper end of the bottle body for exhausting the air at the top.

[0012] As a preferred solution, the injection hole is set to be through-through from top to bottom, and the injection hole is set to be stepped with a small upper end and a large lower end. The center of the partition is provided with a connecting frame for connecting the inner edge of the partition, and the center of the connecting frame is provided with a first liquid filling plunger that protrudes downward and extends into the injection hole. The diameter of the first liquid filling plunger is smaller than the inner diameter of the upper end of the injection hole, and the lower end of the first liquid filling plunger is provided with a liquid-stopping ball for extending into the injection hole. The diameter of the liquid-stopping ball is larger than the inner diameter of the upper end of the injection hole. When static, the rear end of the liquid-stopping ball abuts against the stepped connection of the injection hole to form a closed state to prevent liquid leakage; when filling, the piston is pushed upward, and the rear end of the liquid-stopping ball is away from the upper end of the injection hole to allow liquid to pass through the gap.

[0013] As a preferred solution, a transverse liquid inlet hole is provided at the top end of the liquid injection hole in communication therewith, and the transverse liquid inlet hole extends to the outer surface of the piston for liquid to flow out.

[0014] As a preferred solution, the outer surface of the piston is also provided with one or more annular sealing rings, which are arranged above and / or below the horizontal liquid inlet hole. When static, the outer end surface of the annular sealing ring is against the inner wall of the tail cover to form a closed state; when filling with liquid, the piston is pushed upward, and the annular sealing ring located above the horizontal liquid inlet hole will move away from the inner wall of the tail cover, and allow the liquid to flow into the lower cavity of the bottle body through the horizontal liquid inlet hole and then enter the upper cavity.

[0015] As a preferred solution, a plunger hole extending upward from the lower end surface is further provided in the piston, and the plunger hole passes longitudinally through the transverse liquid inlet hole and maintains a certain distance from the top of the piston.

[0016] As a preferred solution, the tail cover is provided with a second liquid filling plunger extending upward, and the second liquid filling plunger is arranged corresponding to the position of the plunger hole on the piston. When static, the second liquid filling plunger extends into the plunger hole and passes through the horizontal liquid inlet hole to prevent the liquid from leaking outward; when filling, when the piston is lifted, the horizontal liquid inlet hole moves upward with the piston, thereby making the horizontal liquid inlet hole move away from the second liquid filling plunger, so that the liquid can be filled into the bottle body.

[0017] As a preferred solution, the annular sealing ring is detachably mounted on the outer surface of the piston, and the outer surface of the piston is provided with an annular groove for installation therein, and the number of the annular groove is at least one.

[0018] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0019] The utility model has the advantages of simple structure, easy use and quick assembly. The tail valve assembly is fixed to the lower end of the bottle body. When in use, the liquid outlet nozzle of the mother bottle is inserted into the liquid filling hole at the bottom to fill the liquid inwardly. An exhaust hole is provided on the piston to facilitate the discharge of air in the bottle body. In addition, a variety of liquid-stop sealing structures with different structures are provided on the tail valve assembly, which effectively prevents leakage of internal liquid and has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] FIG1 is a schematic diagram of the overall structure of the first embodiment of the present utility model.

[0022] FIG2 is a schematic diagram of the exploded structure of the first embodiment of the present invention.

[0023] FIG3 is a schematic cross-sectional view of the bottle body and tail valve assembly of the first embodiment of the present invention.

[0024] FIG4 is a schematic structural diagram of the first embodiment of the present invention in a filling state.

[0025] FIG5 is a schematic diagram of the overall structure of the second embodiment of the present utility model.

[0026] FIG6 is a schematic diagram of the exploded structure of the second embodiment of the present invention.

[0027] FIG7 is a schematic cross-sectional view of the bottle body and tail valve assembly of the second embodiment of the present invention.

[0028] FIG8 is a schematic structural diagram of the second embodiment of the present invention in a filling state.

[0029] FIG9 is a schematic diagram of the overall structure of the third embodiment of the present utility model.

[0030] FIG10 is a schematic diagram of the exploded structure of the third embodiment of the present invention.

[0031] FIG11 is a schematic cross-sectional view of the bottle body and tail valve assembly of the third embodiment of the present invention.

[0032] FIG12 is a schematic structural diagram of the third embodiment of the present invention in the filling state.

[0033] Among them, the figure marks are: 100, bottle body; 110, upper cavity; 120, lower cavity; 130, partition; 140, connecting frame; 150, first liquid filling plunger; 160, liquid stop ball; 200, tail valve assembly; 210, tail cover; 211, liquid filling port; 212, exhaust plunger; 213, second liquid filling plunger; 220, piston; 221, liquid filling hole; 222, exhaust hole; 223, horizontal liquid inlet hole; 224, plunger hole; 225, annular groove; 230, reset spring; 240, exhaust pipe; 250, annular sealing ring; 300, nozzle assembly; 310, straw; 400, mother bottle liquid outlet nozzle. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0039] Example 1, with reference to Figures 1-4: A filling valve structure for a refillable spray bottle, comprising a bottle body 100 and a nozzle assembly 300 disposed on the bottle body 100, the nozzle assembly 300 comprising a spray pump (not shown in the figure) and a straw 310 connected thereto and extending into the bottle body 100, the nozzle assembly 300 and the bottle body 100 are fixedly mounted using a snap-fit ​​connection, a partition 130 is provided at the lower end of the bottle body 100, the partition 130 divides the bottle body 100 into an upper cavity 110 and a lower cavity 120, and a through-hole is provided at the center of the partition 130 to facilitate liquid to flow into the bottle body 100 from bottom to top, wherein the lower cavity 120 of the bottle body 100 is also provided. 0, the tail valve assembly 200 includes a tail cover 210 and a piston 220. By placing the piston 220 in the tail cover 210, and providing a liquid injection hole 221 and an exhaust hole 222 running through the piston 220, the filling liquid can enter the bottle body 100 through the liquid injection hole 221 on the piston 220, and then the air in the bottle body 100 is discharged outward through the exhaust hole 222, so as to improve the filling efficiency, and the tail cover 210 is provided with a liquid injection port 211 and an exhaust plunger 212 corresponding to the liquid injection hole 221 and the exhaust hole 222 on the piston 220. During installation, the exhaust plunger 212 is extended into the exhaust hole 222 to prevent the liquid in the bottle from leaking.

[0040] In this embodiment, a return spring 230 is provided between the piston 220 and the partition 130 of the bottle body 100, so that one end of the return spring 230 is pressed against the piston 220 and the other end is pressed against the lower end surface of the partition 130, and the return spring 230 always has a downward force to push the lower end surface of the piston 220 against the inner end surface of the tail cover 210. When at rest, the return spring 230 pushes up the piston 220 so that the lower end surface of the piston 220 always conflicts with the inner end surface of the tail cover 210. When the mother bottle liquid outlet nozzle 400 is inserted, the piston 220 is pushed upward and the return spring 230 is elastically contracted. When the filling is completed, the return spring 230 is subjected to the elastic deformation force, so that it returns to its original shape and pushes the piston 220 up to restore its original shape so that the lower end surface of the piston 220 conflicts with the inner end surface of the tail cover 210.

[0041] In this embodiment, by setting the exhaust hole 222 to be a stepped shape with a small top and a large bottom, and setting the shape of the exhaust plunger 212 to be a structure with a small top and a large bottom, and making it compatible with the structure of the exhaust hole 222, in the static state after assembly, the lower end surface of the piston 220 conflicts with the inner end surface of the tail cover 210. At this time, the exhaust plunger 212 will be inserted into the exhaust hole 222 to prevent the liquid in the bottle body 100 from leaking out; when filling the liquid, the piston 220 will be pushed upward, so that the exhaust hole 222 is away from the exhaust plunger 212 and the compressed air in the bottle body 100 is discharged outward from the exhaust hole 222, so as to facilitate the filling of liquid and improve the filling efficiency.

[0042] Specifically, an exhaust pipe 240 is also provided in the bottle body 100. One end of the exhaust pipe 240 is inserted into the exhaust hole 222 of the piston 220, and then the other end is extended upward to the upper end of the bottle body 100, so that the exhaust pipe 240 can discharge the air at the top of the bottle body 100. When liquid is injected into the bottle body 100, the compressed air in the bottle will move upward and be discharged outward through the exhaust pipe 240.

[0043] In this embodiment, the injection hole 221 is set to be through-through, and the injection hole 221 is set to be stepped with a small upper end and a large lower end. A connecting frame 140 for connecting the inner edge of the partition 130 is provided at the center of the partition 130, and a first liquid filling plunger 150 is provided at the center of the connecting frame 140, which protrudes downward and extends into the injection hole 221. The diameter of the first liquid filling plunger 150 is set to be smaller than the inner diameter of the upper end of the injection hole 221, and a There is a liquid-stopping ball 160, and the diameter of the liquid-stopping ball 160 is larger than the inner diameter of the upper end of the liquid injection hole 221; in static state, the rear end of the liquid-stopping ball 160 is against the stepped connection of the liquid injection hole 221, thereby forming a closed state through the mutual interference between the two to prevent liquid leakage. When liquid needs to be filled, the piston 220 will be pushed upward, so that the liquid-stopping ball 160 is away from the upper end of the liquid injection hole 221, so that a gap appears between the two for liquid to pass through the gap and enter the bottle body 100.

[0044] Furthermore, the structure of the liquid-stopping ball 160 is not limited to a spherical shape, and can also be set to a cone-shaped or columnar structure.

[0045] In this embodiment, an annular sealing ring 250 is also provided on the outer surface of the piston 220. The annular sealing ring 250 is detachably mounted on the outer surface of the piston 220, and an annular groove 225 for installing it is provided on the outer surface of the piston 220. The outer end face of the annular sealing ring 250 abuts against the inner wall of the tail cover 210 to form a closed state.

[0046] Example 2, with reference to Figures 5-8: A filling valve structure for a refillable spray bottle, comprising a bottle body 100 and a nozzle assembly 300 disposed on the bottle body 100, the nozzle assembly 300 comprising a spray pump (not shown in the figure) and a straw 310 connected thereto and extending into the bottle body 100, the nozzle assembly 300 and the bottle body 100 are fixedly mounted using a snap-fit ​​connection, a partition 130 is provided at the lower end of the bottle body 100, the partition 130 divides the bottle body 100 into an upper cavity 110 and a lower cavity 120, and a through-shape is provided at the center of the partition 130 to facilitate liquid to flow into the bottle body 100 from bottom to top, wherein the lower cavity 120 of the bottle body 100 is also provided. 0, the tail valve assembly 200 includes a tail cover 210 and a piston 220. By placing the piston 220 in the tail cover 210, and providing a liquid injection hole 221 and an exhaust hole 222 running through the piston 220, the filling liquid can enter the bottle body 100 through the liquid injection hole 221 on the piston 220, and then the air in the bottle body 100 is discharged outward through the exhaust hole 222, so as to improve the filling efficiency, and the tail cover 210 is provided with a liquid injection port 211 and an exhaust plunger 212 corresponding to the liquid injection hole 221 and the exhaust hole 222 on the piston 220. During installation, the exhaust plunger 212 is extended into the exhaust hole 222 to prevent the liquid in the bottle from leaking.

[0047] In this embodiment, a return spring 230 is provided between the piston 220 and the partition 130 of the bottle body 100, so that one end of the return spring 230 is pressed against the piston 220 and the other end is pressed against the lower end surface of the partition 130, and the return spring 230 always has a downward force to push the lower end surface of the piston 220 against the inner end surface of the tail cover 210. When at rest, the return spring 230 pushes up the piston 220 so that the lower end surface of the piston 220 always conflicts with the inner end surface of the tail cover 210. When the mother bottle liquid outlet nozzle 400 is inserted, the piston 220 is pushed upward and the return spring 230 is elastically contracted. When the filling is completed, the return spring 230 is subjected to the elastic deformation force, so that it returns to its original shape and pushes the piston 220 up to restore its original shape so that the lower end surface of the piston 220 conflicts with the inner end surface of the tail cover 210.

[0048] In this embodiment, by setting the exhaust hole 222 to be a stepped shape with a small top and a large bottom, and setting the shape of the exhaust plunger 212 to be a structure with a small top and a large bottom, and making it compatible with the structure of the exhaust hole 222, in the static state after assembly, the lower end surface of the piston 220 conflicts with the inner end surface of the tail cover 210. At this time, the exhaust plunger 212 will be inserted into the exhaust hole 222 to prevent the liquid in the bottle body 100 from leaking out; when filling the liquid, the piston 220 will be pushed upward, so that the exhaust hole 222 is away from the exhaust plunger 212 and the compressed air in the bottle body 100 is discharged outward from the exhaust hole 222, so as to facilitate the filling of liquid and improve the filling efficiency.

[0049] Specifically, an exhaust pipe 240 is also provided in the bottle body 100. One end of the exhaust pipe 240 is inserted into the exhaust hole 222 of the piston 220, and then the other end is extended upward to the upper end of the bottle body 100, so that the exhaust pipe 240 can discharge the air at the top of the bottle body 100. When liquid is injected into the bottle body 100, the compressed air in the bottle will move upward and be discharged outward through the exhaust pipe 240.

[0050] In this embodiment, a transverse liquid inlet hole 223 is provided at the top of the liquid filling hole 221 and is connected thereto, and the transverse liquid inlet hole 223 is extended to the outer surface of the piston 220 for liquid to flow out, and the position height of the transverse liquid inlet hole 223 is set at the upper end of the tail cover 210. When filling with liquid, the piston 220 moves upward, and the transverse liquid inlet hole 223 will move with the piston 220, thereby moving away from the inner wall of the tail cover 210, so that the filled liquid can flow into the bottle body 100.

[0051] In this embodiment, the outer surface of the piston 220 is further provided with an annular sealing ring 250, the number of which is set to two, and the annular sealing rings 250 are respectively arranged above and below the horizontal liquid inlet hole 223, and an annular groove 225 for it to be installed therein is also provided on the outer surface of the piston 220, so that the outer end surface of the annular sealing ring 250 abuts against the inner wall of the tail cover 210, thereby forming a sealed state between the piston 220 and the tail cover 210 to prevent liquid leakage; when filling with liquid, the piston 220 is pushed upward, the annular sealing ring 250 located above the horizontal liquid inlet hole 223 will move away from the inner wall of the tail cover 210, and the horizontal liquid inlet hole 223 will also leave the covering range of the tail cover 210, and the liquid filled from the horizontal liquid inlet hole 223 will flow into the lower cavity 120 of the bottle body 100, and continuously pour the liquid from bottom to top into the upper cavity 110 through the center of the partition 130.

[0052] Example 3, with reference to Figures 9-12: A filling valve structure for a refillable spray bottle, comprising a bottle body 100 and a nozzle assembly 300 disposed on the bottle body 100, the nozzle assembly 300 comprising a spray pump (not shown in the figure) and a straw 310 connected thereto and extending into the bottle body 100, the nozzle assembly 300 and the bottle body 100 are fixedly mounted using a snap-fit ​​connection, a partition 130 is provided at the lower end of the bottle body 100, the partition 130 divides the bottle body 100 into an upper cavity 110 and a lower cavity 120, and a through-shape is provided at the center of the partition 130 to facilitate liquid to flow from bottom to top into the bottle body 100, wherein the nozzle assembly 300 further comprises a nozzle assembly 310 disposed in the lower cavity 110 of the bottle body 100. The tail valve assembly 200 in the bottle 20 includes a tail cover 210 and a piston 220. By placing the piston 220 in the tail cover 210 and providing a liquid injection hole 221 and an exhaust hole 222 extending vertically therethrough on the piston 220, the filling liquid can enter the bottle body 100 through the liquid injection hole 221 on the piston 220, and then the air in the bottle body 100 is discharged outward through the exhaust hole 222, so as to improve the filling efficiency. In addition, a liquid injection port 211 and an exhaust plunger 212 corresponding to the liquid injection hole 221 and the exhaust hole 222 on the piston 220 are provided on the tail cover 210. During installation, the exhaust plunger 212 is extended into the exhaust hole 222 to prevent the liquid in the bottle from leaking.

[0053] In this embodiment, a return spring 230 is provided between the piston 220 and the partition 130 of the bottle body 100, so that one end of the return spring 230 is pressed against the piston 220 and the other end is pressed against the lower end surface of the partition 130, and the return spring 230 always has a downward force to push the lower end surface of the piston 220 against the inner end surface of the tail cover 210. When at rest, the return spring 230 pushes up the piston 220 so that the lower end surface of the piston 220 always conflicts with the inner end surface of the tail cover 210. When the mother bottle liquid outlet nozzle 400 is inserted, the piston 220 is pushed upward and the return spring 230 is elastically contracted. When the filling is completed, the return spring 230 is subjected to the elastic deformation force, so that it returns to its original shape and pushes the piston 220 up to restore its original shape so that the lower end surface of the piston 220 conflicts with the inner end surface of the tail cover 210.

[0054] In this embodiment, by setting the exhaust hole 222 to be a stepped shape with a small top and a large bottom, and setting the shape of the exhaust plunger 212 to be a structure with a small top and a large bottom, and making it compatible with the structure of the exhaust hole 222, in the static state after assembly, the lower end surface of the piston 220 conflicts with the inner end surface of the tail cover 210. At this time, the exhaust plunger 212 will be inserted into the exhaust hole 222 to prevent the liquid in the bottle body 100 from leaking out; when filling the liquid, the piston 220 will be pushed upward, so that the exhaust hole 222 is away from the exhaust plunger 212 and the compressed air in the bottle body 100 is discharged outward from the exhaust hole 222, so as to facilitate the filling of liquid and improve the filling efficiency.

[0055] Specifically, an exhaust pipe 240 is also provided in the bottle body 100. One end of the exhaust pipe 240 is inserted into the exhaust hole 222 of the piston 220, and then the other end is extended upward to the upper end of the bottle body 100, so that the exhaust pipe 240 can discharge the air at the top of the bottle body 100. When liquid is injected into the bottle body 100, the compressed air in the bottle will move upward and be discharged outward through the exhaust pipe 240.

[0056] In this embodiment, a transverse liquid inlet hole 223 is provided at the top of the liquid filling hole 221 and is connected thereto, and the transverse liquid inlet hole 223 is extended to the outer surface of the piston 220 for liquid to flow out, and the position height of the transverse liquid inlet hole 223 is set at the upper end of the tail cover 210. When filling with liquid, the piston 220 moves upward, and the transverse liquid inlet hole 223 will move with the piston 220, thereby moving away from the inner wall of the tail cover 210, so that the filled liquid can flow into the bottle body 100.

[0057] Specifically, a plunger hole 224 extending upward from the lower end surface is provided on the piston 220. The plunger hole 224 is passed longitudinally through the transverse liquid inlet hole 223, and a certain distance is maintained between the plunger hole 224 and the top of the piston 220 to prevent liquid from flowing out from here after penetration.

[0058] Furthermore, by providing an upwardly extending second liquid filling plunger 213 on the tail cover 210, and the second liquid filling plunger 213 is arranged at a position corresponding to the plunger hole 224 on the piston 220, in static state, the second liquid filling plunger 213 extends into the plunger hole 224 and passes through the horizontal liquid inlet hole 223 to prevent the liquid in the bottle body 100 from leaking outward; when filling, the piston 220 will be pushed up, and the horizontal liquid inlet hole 223 moves upward with the piston 220, so that the horizontal liquid inlet hole 223 is away from the second liquid filling plunger 213. At this time, the second liquid filling plunger 213 The second filling plunger 213 is located below the horizontal liquid inlet hole 223 and cannot block the liquid from being filled in, thereby achieving the goal of filling the bottle body 100 with liquid. When the filling is completed, the mother bottle liquid outlet nozzle 400 will be pulled out from the piston 220. At this time, the piston 220 will be subjected to the restoring force of the return spring 230, causing the piston 220 to return and move downward. The plunger hole 224 will move downward along the second filling plunger 213, thereby causing the second filling plunger 213 to pass through the horizontal liquid inlet hole 223 longitudinally, achieving a blocking effect to prevent liquid leakage.

[0059] In this embodiment, an annular sealing ring 250 is further provided on the outer surface of the piston 220, and the annular sealing ring 250 is arranged below the horizontal liquid inlet hole 223. An annular groove 225 for installing it is also provided on the outer surface of the piston 220, so that the outer end surface of the annular sealing ring 250 abuts against the inner wall of the tail cover 210, thereby forming a sealed state between the piston 220 and the tail cover 210 to prevent liquid leakage; when the piston 220 is pushed upward, the horizontal liquid inlet hole 223 will leave the covering range of the tail cover 210, and the second filling plunger 213 will move away from the horizontal liquid inlet hole 223, so that the liquid filled from the horizontal liquid inlet hole 223 flows into the lower cavity 120 of the bottle body 100, and continuously fills the liquid from bottom to top into the upper cavity 110 through the center of the partition 130.

[0060] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. A filling valve structure for a refillable spray bottle, comprising a bottle body and a spray head assembly arranged on the bottle body, a partition is arranged at the lower end of the bottle body for dividing the bottle body into an upper cavity and a lower cavity, the center of the partition is through-shaped for liquid to flow in, characterized in that: It also includes a tail valve assembly arranged in the lower cavity of the bottle body, the tail valve assembly includes a tail cover and a piston, the piston is placed in the tail cover and is provided with a liquid injection hole and an exhaust hole extending vertically, the tail cover is provided with a liquid injection port and an exhaust plunger corresponding to the liquid injection hole and the exhaust hole on the piston, and the exhaust plunger extends into the exhaust hole to prevent the liquid in the bottle from leaking.

2. The filling valve structure of the refillable spray bottle according to claim 1, characterized in that: A return spring is arranged between the piston and the partition of the bottle body, one end of the return spring abuts against the piston, and the other end abuts against the lower end surface of the partition. The return spring always has a downward force to make the lower end surface of the piston abut against the inner end surface of the tail cover.

3. The filling valve structure of the refillable spray bottle according to claim 1, characterized in that: The exhaust hole is arranged in a stepped shape with a small top and a large bottom, and the shape of the exhaust plunger is arranged in a structure with a small top and a large bottom and is adapted to the structure of the exhaust hole. When the piston is static, its lower end surface abuts against the inner end surface of the tail cover, and the exhaust plunger is inserted into the exhaust hole to prevent the liquid in the bottle from leaking outwardly; when filling with liquid, the piston is pushed upward, the exhaust plunger is away from the exhaust hole, and the compressed air generated by the filling of the bottle body with liquid is discharged outwardly from the exhaust hole.

4. The filling valve structure of the refillable spray bottle according to claim 3, characterized in that: The bottle body is also provided with an exhaust pipe, one end of which is inserted into the exhaust hole of the piston, and the other end of which extends upward to the upper end of the bottle body for exhausting the air at the top.

5. The filling valve structure of the refillable spray bottle according to claim 1, characterized in that: The injection hole is set to be through-through from top to bottom, and the injection hole is set to be stepped with a small upper end and a large lower end. A connecting frame for connecting the inner edge of the partition is provided at the center of the partition, and a first filling plunger is provided at the center of the connecting frame, which protrudes downward and extends into the injection hole. The diameter of the first filling plunger is smaller than the inner diameter of the upper end of the injection hole, and the lower end of the first filling plunger is provided with a stop ball for extending into the injection hole. The diameter of the stop ball is larger than the inner diameter of the upper end of the injection hole. When static, the rear end of the stop ball abuts against the stepped connection of the injection hole to form a closed state to prevent liquid leakage; when filling, the piston is pushed upward, and the rear end of the stop ball is away from the upper end of the injection hole to allow liquid to pass through the gap.

6. The filling valve structure of the refillable spray bottle according to claim 1, characterized in that: The top end of the liquid injection hole is provided with a transverse liquid inlet hole connected thereto, and the transverse liquid inlet hole extends to the outer surface of the piston for liquid to flow out.

7. The filling valve structure of the refillable spray bottle according to claim 6, characterized in that: The outer surface of the piston is also sleeved with one or more annular sealing rings, which are arranged above and / or below the transverse liquid inlet hole. When static, the outer end surface of the annular sealing ring abuts against the inner wall of the tail cover to form a closed state; when filling with liquid, the piston is pushed upward, and the annular sealing ring located above the transverse liquid inlet hole will be away from the inner wall of the tail cover, and the liquid will flow into the lower cavity of the bottle body through the transverse liquid inlet hole and then enter the upper cavity.

8. The filling valve structure of the refillable spray bottle according to claim 6, characterized in that: The piston is also provided with a plunger hole extending upward from the lower end surface. The plunger hole passes through the transverse liquid inlet hole longitudinally and keeps a certain distance from the top of the piston.

9. The filling valve structure of the refillable spray bottle according to claim 8, characterized in that: The tail cover is provided with a second liquid filling plunger extending upward, and the second liquid filling plunger is arranged corresponding to the position of the plunger hole on the piston. When static, the second liquid filling plunger extends into the plunger hole and passes through the transverse liquid inlet hole to prevent the liquid from leaking outward; when filling with liquid, when the piston is lifted up, the transverse liquid inlet hole moves upward with the piston, thereby making the transverse liquid inlet hole away from the second liquid filling plunger, so that the liquid can be filled into the bottle body.

10. The filling valve structure of the refillable spray bottle according to claim 7, characterized in that: The annular sealing ring is detachably mounted on the outer surface of the piston. The outer surface of the piston is provided with an annular groove for installation therein, and the number of the annular groove is at least one.

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