Prefill valve structure of spray bottle

Abstract

The prefill valve structure of the spray bottle comprises a hollow bottle body, a spray head assembly and a tail valve assembly, the spray head assembly and the tail valve assembly are installed at the upper end and the lower end of the bottle body, the tail valve assembly comprises a tail cover, a piston, a limiting meson and an upper sealing ring, and the upper sealing ring is installed at the lower inner end of the bottle body in an embedded mode and matched with the piston to enable the bottle body to be in a closed state. The limiting meson is arranged below the upper sealing ring, and the piston is movably arranged in the tail cover and sequentially penetrates through the limiting meson and the upper sealing ring to extend into the bottle body, so that the piston moves upwards and fills liquid into the bottle body during liquid filling; the spray bottle is convenient and fast to use, the spray bottle is divided into three parts to be assembled together, various sealing structures are arranged in the tail valve assembly, it can be guaranteed that internal liquid cannot leak when the liquid is stored or filled, the exhaust hole is formed in the bottle body, internal air can be exhausted outwards in time, the filling efficiency is improved, and the spray bottle is convenient to use. And the tail valve assembly is simple in structure, the effect of rapid assembly can be achieved, and the assembly production efficiency is improved.

Description

Technical Field

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

[0002] Currently, most of the perfume bottles on the market are filled with perfume from the top, and only a few can be filled with perfume 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 internal air can be discharged in time during filling to ensure smooth filling of the perfume.

[0003] However, the existing liquid-filled spray bottles have a complex internal liquid-filling structure and a very cumbersome production and assembly process, resulting in low assembly efficiency, thereby making the product production efficiency low, and easily causing leakage at the lower end of the bottle body, affecting the user experience.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the utility model faces the shortcomings of the prior art, and its main purpose is to provide a liquid filling valve structure for a spray bottle.

[0006] To achieve the above objectives, the utility model adopts the following technical solution:

[0007] A filling valve structure for a spray bottle comprises a hollow bottle body and a spray head assembly and a tail valve assembly installed at the upper and lower ends of the bottle body. The lower end of the bottle body is also provided with an exhaust hole, an exhaust pipe is inserted into the exhaust hole and extends upward to the upper end of the bottle body. The tail valve assembly comprises a tail cover, a piston, a limiter and an upper sealing ring. The upper sealing ring is embedded and installed at the lower inner end of the bottle body and cooperates with the piston to form a closed state of the bottle body. The limiter is arranged below the upper sealing ring. The piston is movably arranged inside the tail cover and sequentially passes through the limiter and the upper sealing ring to extend into the bottle body, so that the piston moves upward and pours liquid into the bottle body during filling.

[0008] As a preferred embodiment, a liquid-filled sealing ring is further provided between the piston and the tail cover. The liquid-filled sealing ring has a conical structure that is larger at the top and smaller at the bottom. The upper end surface of the liquid-filled sealing ring is in contact with the lower end surface of the piston, and the lower end conical surface of the liquid-filled sealing ring is in contact with the inner lower end conical surface of the tail cover to form a sealing state. The lower end conical surface of the liquid-filled sealing ring is provided with an annular ridge for enhancing the sealing effect with the inner lower end conical surface of the tail cover.

[0009] As a preferred embodiment, the liquid filling sealing ring and the piston are made by adopting an integrated molding processing technology, and the center of the lower end of the liquid filling sealing ring is provided with a liquid filling groove extending along its longitudinal direction, and the liquid filling groove extends into the piston, and the tail end of the liquid filling groove is provided with a horizontal liquid inlet groove extending to both sides and passing through the piston, so as to facilitate the filling of liquid through the liquid filling groove, and then let the liquid flow into the bottle body through the horizontal liquid inlet grooves at both side ends.

[0010] As a preferred embodiment, the piston is provided with a positioning wing protruding toward the outward end, and the positioning wings are spaced apart on the lower outer surface of the piston.

[0011] As a preferred embodiment, the piston is also provided with a return spring, which is sleeved on the piston, with the lower end of the return spring abutting against the positioning wing of the piston and the upper end abutting against the inner end surface of the limit meson. The return spring always has a downward force to enable the piston to return to its original state after filling with liquid to prevent leakage.

[0012] As a preferred embodiment, the inner end of the limit meson is arranged in a stepped shape from bottom to top, and the inner end surface of the stepped limit meson is also provided with a raised limit rib, and the limit rib gradually extends outward from bottom to top, and the upper end of the reset spring rests on the limit rib at the inner end of the limit meson, and the limit meson is also provided with a through hole for the piston to pass through.

[0013] As a preferred embodiment, a raised shoulder is also provided between the limiting meson and the upper sealing ring, and the shoulder annular array is distributed between the limiting meson and the upper sealing ring and an exhaust groove is formed between the two.

[0014] As a preference, the boss annular array is arranged on the upper end surface of the limiting meson, the boss and the limiting meson are manufactured by using an integral molding technology, and the upper sealing ring has a conical structure that is larger at the bottom and smaller at the top and gradually shrinks inwards.

[0015] Preferably, the boss annular array is arranged at the lower end of the upper sealing ring and extends outward, the boss and the upper sealing ring are manufactured by one-piece molding technology, and the side end of the upper sealing ring and the lower inner end surface of the bottle body form a gap for air to flow out.

[0016] As a preferred embodiment, the boss annular array is arranged on the upper end surface of the limiting meson, and the boss and the limiting meson are manufactured by one-piece molding technology. The lower outer end of the upper sealing ring is provided with a wavy annular structure and forms a gap with the lower inner end surface of the bottle body to allow the air in the bottle body to flow out.

[0017] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0018] The utility model is convenient and quick to use. The spray bottle is divided into three parts and assembled together, and a plurality of sealing structures are arranged in the tail valve assembly at the rear, which can effectively ensure that the internal liquid will not leak when storing or filling the liquid. An exhaust hole is arranged in the bottle body, which can discharge the internal air to the outside in time, thereby improving the filling efficiency. The tail valve assembly has a simple structure and can achieve the effect of quick assembly, thereby improving the assembly production efficiency and reducing the production cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0020] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0021] Figure 2 It is a schematic diagram of the decomposed structure of the first embodiment of the utility model.

[0022] Figure 3 It is a schematic diagram of the structure of the tail valve assembly of the first embodiment of the utility model.

[0023] Figure 4 It is a schematic diagram of the full profile structure of the first embodiment of the utility model.

[0024] Figure 5 It is a schematic diagram of the overall structure of the second embodiment of the utility model.

[0025] Figure 6 It is a schematic diagram of the exploded structure of the second embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the tail valve assembly of the second embodiment of the utility model.

[0027] Figure 8 It is a schematic diagram of the full profile structure of the second embodiment of the utility model.

[0028] Fig. 9 It is a schematic diagram of the overall structure of the third embodiment of the utility model.

[0029] Fig.10 It is a schematic diagram of the exploded structure of the third embodiment of the present invention.

[0030] Fig.11 It is a schematic diagram of the structure of the tail valve assembly of the third embodiment of the utility model.

[0031] Fig.12 It is a schematic diagram of the entire profile structure of the third embodiment of the utility model.

[0032] Among them, the reference numerals in the figure are:

[0033] 100. Bottle body; 110. Exhaust hole; 120. Exhaust pipe;

[0034] 200, nozzle assembly;

[0035] 300, tail valve assembly; 310, tail cover; 320, piston; 321, positioning wing; 330, limit meson; 331, through hole; 340, upper sealing ring; 350, liquid filling sealing ring; 360, liquid injection groove; 370, horizontal liquid inlet groove; 380, reset spring; 390, boss. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0038] 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 drawings, and are only for the convenience of describing the present 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 should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] Reference Figure 1-4 As shown, embodiment 1: a filling valve structure of a spray bottle, comprising a hollow bottle body 100 and a spray head assembly 200 and a tail valve assembly 300 installed at the upper and lower ends of the bottle body 100, so that the spray head assembly 200 and the tail valve assembly 300 are both arranged to be detachably installed on the bottle body 100, and the spray head assembly 200 has a spray pump and a straw connected thereto and extending into the bottle body 100 to suck liquid, and an exhaust hole 110 is also arranged at the lower end of the bottle body 100, and an exhaust pipe 120 is inserted into the exhaust hole 110 and extended upward to the upper end of the bottle body 100 for sucking air at the upper end so that the user can The tail valve assembly 300 includes a tail cover 310, a piston 320, a limiter 330 and an upper sealing ring 340. The upper sealing ring 340 is embedded and installed in the lower inner end of the bottle body 100, so that the bottle body 100 forms a sealed state to prevent leakage of liquid. Then, the limiter 330 is arranged below the upper sealing ring 340, and the piston 320 is movably arranged at the inner end of the tail cover 310, and is sequentially passed through the limiter 330 and the upper sealing ring 340 to extend into the bottle body 100, so that the user can pour liquid into the bottle body 100 when the piston 320 moves upward.

[0042] In this embodiment, a liquid-filled sealing ring 350 is further provided between the piston 320 and the tail cover 310, and the liquid-filled sealing ring 350 has a conical structure that is larger at the top and smaller at the bottom, so that the upper end surface of the liquid-filled sealing ring 350 is in contact with the lower end surface of the piston 320, and the lower end conical surface of the liquid-filled sealing ring 350 is in contact with the inner lower end conical surface of the tail cover 310 to form a sealed state, so that the liquid-filled sealing ring 350 is always in contact with the inner lower end conical surface of the tail cover 310 in a normal state to form a closed state to prevent liquid / air leakage, and an annular ridge is also provided on the lower end conical surface of the liquid-filled sealing ring 350 to enhance the sealing effect with the inner lower end conical surface of the tail cover 310.

[0043] Specifically, the liquid filling sealing ring 350 and the piston 320 used are made of one-piece molding processing technology, and a liquid injection groove 360 ​​extending along its longitudinal direction is provided at the center of the lower end of the liquid filling sealing ring 350, and the liquid injection groove 360 ​​extends into the piston 320. A horizontal liquid inlet groove 370 extending to both sides and passing through the piston 320 is also provided at the tail end of the liquid injection groove 360, so that the user can fill liquid into the bottle body 100 through the liquid injection groove 360, so that the liquid first flows inward from the liquid injection groove 360, and then flows into the bottle body 100 through the horizontal liquid inlet grooves 370 on both side ends, thereby achieving the filling effect.

[0044] Furthermore, when the piston 320 is in a normal unfilled state, the lateral liquid inlet grooves 370 on both sides abut against the inner wall of the upper sealing ring 340 to form a closed state; when the perfume liquid needs to be filled, the piston 320 is pushed upward to make the lateral liquid inlet grooves 370 on both sides away from the upper sealing ring 340 and exposed to the bottle body 100, so that the perfume liquid can be filled into the bottle body 100 for storage.

[0045] In this embodiment, a positioning wing 321 projecting outwardly to the piston 320 is also provided on the piston 320 , and the positioning wing 321 is distributed at a distance from the lower outer surface of the piston 320 .

[0046] Specifically, a return spring 380 is also provided on the piston 320, and the return spring 380 is sleeved on the piston 320, and the lower end of the return spring 380 is pressed against the positioning wing 321 of the piston 320, and the upper end of the return spring 380 is pressed against the inner end surface of the limit meson 330, and the return spring 380 always has a downward pushing force, so that after the piston 320 is pushed upward by the filling liquid, the return spring 380 can restore the piston 320 to its original position, so that the liquid filling sealing ring 350 on the piston 320 can be pressed against the inner lower end surface of the tail cover 310 in time to prevent the internal liquid from leaking, thereby avoiding inconvenience to the user.

[0047] Furthermore, by setting the inner end of the limit meson 330 to be stepped from bottom to top, and providing a raised limit rib on the inner end surface of the stepped limit meson 330, the limit rib gradually extends outward from bottom to top, so that the upper end of the reset spring 380 can be against the limit rib at the inner end of the limit meson 330, and a through hole 331 for the piston 320 to pass through is also provided on the limit meson 330, so that the piston 320 can pass through the center of the limit meson 330 and extend into the bottle body 100.

[0048] In this embodiment, a raised boss 390 is further provided between the limiting meson 330 and the upper sealing ring 340. The boss 390 is distributed in a ring array between the limiting meson 330 and the upper sealing ring 340, and an exhaust groove is formed between the two, so that the air discharged downward through the exhaust hole 110 can continue to be discharged downward from the exhaust groove, thereby being discharged from the bottle body 100.

[0049] Specifically, the annular array of bosses 390 is set on the upper end surface of the limiting meson 330, and the bosses 390 and the limiting meson 330 are processed by an integrated molding technology, so that there is an exhaust groove between the limiting meson 330 and the upper sealing ring 340 above to allow air to flow downward.

[0050] Furthermore, the upper sealing ring 340 has a conical structure that is larger at the bottom and smaller at the top and gradually shrinks inward. A wavy arc structure is also provided in an annular array on the lower end surface of the bottle body 100 so that it can abut against the outer end of the upper sealing ring 340, so that there is a gap between the upper sealing ring 340 and the wavy arc structure at the lower end of the bottle body 100 for air flow.

[0051] Reference Figure 5-8 As shown, embodiment 2: a filling valve structure of a spray bottle, comprising a hollow bottle body 100 and a spray head assembly 200 and a tail valve assembly 300 installed at the upper and lower ends of the bottle body 100, so that the spray head assembly 200 and the tail valve assembly 300 are both arranged to be detachably installed on the bottle body 100, and the spray head assembly 200 has a spray pump and a straw connected thereto and extending into the bottle body 100 to suck liquid, and an exhaust hole 110 is also arranged at the lower end of the bottle body 100, and an exhaust pipe 120 is inserted into the exhaust hole 110 and extended upward to the upper end of the bottle body 100 for sucking air at the upper end so that the user can The tail valve assembly 300 includes a tail cover 310, a piston 320, a limiter 330 and an upper sealing ring 340. The upper sealing ring 340 is embedded and installed in the lower inner end of the bottle body 100, so that the bottle body 100 forms a sealed state to prevent leakage of liquid. Then, the limiter 330 is arranged below the upper sealing ring 340, and the piston 320 is movably arranged at the inner end of the tail cover 310, and is sequentially passed through the limiter 330 and the upper sealing ring 340 to extend into the bottle body 100, so that the user can pour liquid into the bottle body 100 when the piston 320 moves upward.

[0052] In this embodiment, a liquid-filled sealing ring 350 is further provided between the piston 320 and the tail cover 310, and the liquid-filled sealing ring 350 has a conical structure that is larger at the top and smaller at the bottom, so that the upper end surface of the liquid-filled sealing ring 350 is in contact with the lower end surface of the piston 320, and the lower end conical surface of the liquid-filled sealing ring 350 is in contact with the inner lower end conical surface of the tail cover 310 to form a sealed state, so that the liquid-filled sealing ring 350 is always in contact with the inner lower end conical surface of the tail cover 310 in a normal state to form a closed state to prevent liquid / air leakage, and an annular ridge is also provided on the lower end conical surface of the liquid-filled sealing ring 350 to enhance the sealing effect with the inner lower end conical surface of the tail cover 310.

[0053] Specifically, the liquid filling sealing ring 350 and the piston 320 used are made of one-piece molding processing technology, and a liquid injection groove 360 ​​extending along its longitudinal direction is provided at the center of the lower end of the liquid filling sealing ring 350, and the liquid injection groove 360 ​​extends into the piston 320. A horizontal liquid inlet groove 370 extending to both sides and passing through the piston 320 is also provided at the tail end of the liquid injection groove 360, so that the user can fill liquid into the bottle body 100 through the liquid injection groove 360, so that the liquid first flows inward from the liquid injection groove 360, and then flows into the bottle body 100 through the horizontal liquid inlet grooves 370 on both side ends, thereby achieving the filling effect.

[0054] Furthermore, when the piston 320 is in a normal unfilled state, the lateral liquid inlet grooves 370 on both sides abut against the inner wall of the upper sealing ring 340 to form a closed state; when the perfume liquid needs to be filled, the piston 320 is pushed upward to make the lateral liquid inlet grooves 370 on both sides away from the upper sealing ring 340 and exposed to the bottle body 100, so that the perfume liquid can be filled into the bottle body 100 for storage.

[0055] In this embodiment, a positioning wing 321 projecting outwardly to the piston 320 is also provided on the piston 320 , and the positioning wing 321 is distributed at a distance from the lower outer surface of the piston 320 .

[0056] Specifically, a return spring 380 is also provided on the piston 320, and the return spring 380 is sleeved on the piston 320, and the lower end of the return spring 380 is pressed against the positioning wing 321 of the piston 320, and the upper end of the return spring 380 is pressed against the inner end surface of the limit meson 330, and the return spring 380 always has a downward pushing force, so that after the piston 320 is pushed upward by the filling liquid, the return spring 380 can restore the piston 320 to its original position, so that the liquid filling sealing ring 350 on the piston 320 can be pressed against the inner lower end surface of the tail cover 310 in time to prevent the internal liquid from leaking, thereby avoiding inconvenience to the user.

[0057] Furthermore, by setting the inner end of the limit meson 330 to be stepped from bottom to top, and providing a raised limit rib on the inner end surface of the stepped limit meson 330, the limit rib gradually extends outward from bottom to top, so that the upper end of the reset spring 380 can be against the limit rib at the inner end of the limit meson 330, and a through hole 331 for the piston 320 to pass through is also provided on the limit meson 330, so that the piston 320 can pass through the center of the limit meson 330 and extend into the bottle body 100.

[0058] In this embodiment, a raised boss 390 is further provided between the limiting meson 330 and the upper sealing ring 340. The boss 390 is distributed in a ring array between the limiting meson 330 and the upper sealing ring 340, and an exhaust groove is formed between the two, so that the air discharged downward through the exhaust hole 110 can continue to be discharged downward from the exhaust groove, thereby being discharged from the bottle body 100.

[0059] Specifically, the annular array of bosses 390 is arranged at the lower end of the upper sealing ring 340 and extends outward to the outer end of the upper sealing ring 340, wherein the bosses 390 and the upper sealing ring 340 are manufactured by using an integrated molding technology. During assembly, the lower end and the side end of the upper sealing ring 340 respectively form a gap for air to flow out with the limit meson 330 and the lower inner end surface of the bottle body 100, so that the air in the bottle body 100 can be discharged outward in time.

[0060] Reference Figure 9-12 As shown, embodiment 3: a filling valve structure of a spray bottle, comprising a hollow bottle body 100 and a spray head assembly 200 and a tail valve assembly 300 installed at the upper and lower ends of the bottle body 100, so that the spray head assembly 200 and the tail valve assembly 300 are both arranged to be detachably installed on the bottle body 100, and the spray head assembly 200 has a spray pump and a straw connected thereto and extending into the bottle body 100 to suck liquid, and an exhaust hole 110 is also arranged at the lower end of the bottle body 100, and an exhaust pipe 120 is inserted into the exhaust hole 110 and extended upward to the upper end of the bottle body 100 for sucking air at the upper end so that the user can The tail valve assembly 300 includes a tail cover 310, a piston 320, a limiter 330 and an upper sealing ring 340. The upper sealing ring 340 is embedded and installed in the lower inner end of the bottle body 100, so that the bottle body 100 forms a sealed state to prevent leakage of liquid. Then, the limiter 330 is arranged below the upper sealing ring 340, and the piston 320 is movably arranged at the inner end of the tail cover 310, and is sequentially passed through the limiter 330 and the upper sealing ring 340 to extend into the bottle body 100, so that the user can pour liquid into the bottle body 100 when the piston 320 moves upward.

[0061] In this embodiment, a liquid-filled sealing ring 350 is further provided between the piston 320 and the tail cover 310, and the liquid-filled sealing ring 350 has a conical structure that is larger at the top and smaller at the bottom, so that the upper end surface of the liquid-filled sealing ring 350 is in contact with the lower end surface of the piston 320, and the lower end conical surface of the liquid-filled sealing ring 350 is in contact with the inner lower end conical surface of the tail cover 310 to form a sealed state, so that the liquid-filled sealing ring 350 is always in contact with the inner lower end conical surface of the tail cover 310 in a normal state to form a closed state to prevent liquid / air leakage, and an annular ridge is also provided on the lower end conical surface of the liquid-filled sealing ring 350 to enhance the sealing effect with the inner lower end conical surface of the tail cover 310.

[0062] Specifically, the liquid filling sealing ring 350 and the piston 320 used are made of one-piece molding processing technology, and a liquid injection groove 360 ​​extending along its longitudinal direction is provided at the center of the lower end of the liquid filling sealing ring 350, and the liquid injection groove 360 ​​extends into the piston 320. A horizontal liquid inlet groove 370 extending to both sides and passing through the piston 320 is also provided at the tail end of the liquid injection groove 360, so that the user can fill liquid into the bottle body 100 through the liquid injection groove 360, so that the liquid first flows inward from the liquid injection groove 360, and then flows into the bottle body 100 through the horizontal liquid inlet grooves 370 on both side ends, thereby achieving the filling effect.

[0063] Furthermore, when the piston 320 is in a normal unfilled state, the lateral liquid inlet grooves 370 on both sides abut against the inner wall of the upper sealing ring 340 to form a closed state; when the perfume liquid needs to be filled, the piston 320 is pushed upward to make the lateral liquid inlet grooves 370 on both sides away from the upper sealing ring 340 and exposed to the bottle body 100, so that the perfume liquid can be filled into the bottle body 100 for storage.

[0064] In this embodiment, a positioning wing 321 projecting outwardly to the piston 320 is also provided on the piston 320 , and the positioning wing 321 is distributed at a distance from the lower outer surface of the piston 320 .

[0065] Specifically, a return spring 380 is also provided on the piston 320, and the return spring 380 is sleeved on the piston 320, and the lower end of the return spring 380 is pressed against the positioning wing 321 of the piston 320, and the upper end of the return spring 380 is pressed against the inner end surface of the limit meson 330, and the return spring 380 always has a downward pushing force, so that after the piston 320 is pushed upward by the filling liquid, the return spring 380 can restore the piston 320 to its original position, so that the liquid filling sealing ring 350 on the piston 320 can be pressed against the inner lower end surface of the tail cover 310 in time to prevent the internal liquid from leaking, thereby avoiding inconvenience to the user.

[0066] Furthermore, by setting the inner end of the limit meson 330 to be stepped from bottom to top, and providing a raised limit rib on the inner end surface of the stepped limit meson 330, the limit rib gradually extends outward from bottom to top, so that the upper end of the reset spring 380 can be against the limit rib at the inner end of the limit meson 330, and a through hole 331 for the piston 320 to pass through is also provided on the limit meson 330, so that the piston 320 can pass through the center of the limit meson 330 and extend into the bottle body 100.

[0067] In this embodiment, a raised boss 390 is further provided between the limiting meson 330 and the upper sealing ring 340. The boss 390 is distributed in a ring array between the limiting meson 330 and the upper sealing ring 340, and an exhaust groove is formed between the two, so that the air discharged downward through the exhaust hole 110 can continue to be discharged downward from the exhaust groove, thereby being discharged from the bottle body 100.

[0068] Specifically, a ring array of bosses 390 is arranged on the upper end surface of the limit meson 330, and the bosses 390 and the limit meson 330 are manufactured by one-piece molding technology, and a wavy ring structure is provided at the lower outer end of the upper sealing ring 340, and a gap is formed between the upper sealing ring 340 and the lower inner end surface of the bottle body 100, so that the air in the bottle body 100 can flow out.

[0069] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A filling valve structure for a spray bottle, comprising a hollow bottle body and a spray head assembly and a tail valve assembly mounted at the upper and lower ends of the bottle body, the lower end of the bottle body also having an exhaust hole, an exhaust pipe inserted in the exhaust hole and extending upward to the upper end of the bottle body, characterized in that: The tail valve assembly includes a tail cover, a piston, a limiter and an upper sealing ring. The upper sealing ring is embedded in the lower inner end of the bottle body and cooperates with the piston to form a closed state of the bottle body. The limiter is arranged below the upper sealing ring. The piston is movably arranged inside the tail cover and sequentially passes through the limiter and the upper sealing ring to extend into the bottle body, so that the piston moves up and pours liquid into the bottle body when filling.

2. The filling valve structure of the spray bottle according to claim 1, characterized in that: A liquid-filled sealing ring is also provided between the piston and the tail cover. The liquid-filled sealing ring has a conical structure that is larger at the top and smaller at the bottom. The upper end surface of the liquid-filled sealing ring is in contact with the lower end surface of the piston, and the lower end conical surface of the liquid-filled sealing ring is in contact with the inner lower end conical surface of the tail cover to form a sealing state. The lower end conical surface of the liquid-filled sealing ring is provided with an annular ridge for enhancing the sealing effect with the inner lower end conical surface of the tail cover.

3. The filling valve structure of the spray bottle according to claim 2, characterized in that: The liquid filling sealing ring and the piston are made by adopting an integrated molding processing technology. The lower end center of the liquid filling sealing ring is provided with a liquid filling groove extending along its longitudinal direction. The liquid filling groove extends into the piston. The tail end of the liquid filling groove is provided with a horizontal liquid inlet groove extending to both sides and passing through the piston, so as to facilitate the filling of liquid through the liquid filling groove, and then the liquid flows into the bottle body through the horizontal liquid inlet grooves at both side ends.

4. The filling valve structure of the spray bottle according to claim 1, characterized in that: The piston is provided with positioning wings protruding toward the outer end, and the positioning wings are distributed at intervals on the lower outer surface of the piston.

5. The filling valve structure of the spray bottle according to claim 4, characterized in that: The piston is also provided with a return spring, which is sleeved on the piston. The lower end of the return spring abuts against the positioning wing of the piston, and the upper end abuts against the inner end surface of the limit meson. The return spring always has a downward force to enable the piston to return to its original state after filling with liquid to prevent leakage.

6. The filling valve structure of the spray bottle according to claim 5, characterized in that: The inner end of the limit meson is arranged in a stepped shape from bottom to top, and the inner end surface of the stepped limit meson is also provided with a raised limit rib, which gradually extends outward from bottom to top, and the upper end of the reset spring rests on the limit rib at the inner end of the limit meson. The limit meson is also provided with a through hole for the piston to pass through.

7. The filling valve structure of the spray bottle according to claim 1, characterized in that: A raised shoulder is also provided between the position-limiting meson and the upper sealing ring. The shoulder is distributed in an annular array between the position-limiting meson and the upper sealing ring to form an exhaust groove therebetween.

8. The filling valve structure of the spray bottle according to claim 7, characterized in that: The boss annular array is arranged on the upper end surface of the limiting meson, the boss and the limiting meson are manufactured by using an integral molding technology, and the upper sealing ring is in a conical structure that is larger at the bottom and smaller at the top and gradually shrinks inwards.

9. The filling valve structure of the spray bottle according to claim 7, characterized in that: The boss annular array is arranged at the lower end of the upper sealing ring and extends outwards. The boss and the upper sealing ring are manufactured by one-piece molding technology. The side end of the upper sealing ring and the lower inner end surface of the bottle body form a gap for air to flow out.

10. The filling valve structure of the spray bottle according to claim 7, characterized in that: The boss annular array is arranged on the upper end surface of the limiting meson, and the boss and the limiting meson are manufactured by one-piece molding technology. The lower outer end of the upper sealing ring is provided with a wavy annular structure and forms a gap with the lower inner end surface of the bottle body to allow the air in the bottle body to flow out.

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