Improved liquid filling valve structure for spray bottle

Abstract

An improved liquid filling valve structure for a spray bottle, comprising a bottle body (100) and a spray head assembly (200) mounted on the bottle body (100). A partition plate (130) is arranged at the lower end inside the bottle body (100) and is used for dividing the bottle body (100) into an upper chamber (110) and a lower chamber (120). The partition plate (130) is provided with a through-hole (140) vertically passing therethrough, so that a liquid flows from the lower chamber (120) into the upper chamber (110). A tail valve assembly (300) is arranged at the lower end of the bottle body (100). The tail valve assembly (300) comprises a tail cover (310) and a piston (320). The piston (320) is arranged between the tail cover (310) and the partition plate (130). The piston (320) is provided with a vent hole (321) vertically passing therethrough and a liquid injection hole (322). A transverse liquid inlet hole (323) is provided on a side wall of the piston (320) and communicates with the liquid injection hole (322). In this arrangement, the tail valve assembly is installed at the lower end of the bottle body, and multiple sealing structures are arranged on the tail valve assembly, so that the filled liquid does not leak outwards. In addition, the vent hole for outward air discharge is provided on the tail valve assembly, so that the air inside the bottle body can be effectively discharged outwards. Accordingly, the bottle body has good sealing performance while allowing the air inside the bottle to be discharged outwards, facilitating liquid filling.

Description

An improved filling valve structure for a spray bottle Technical Field

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

[0002] 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.

[0003] However, some existing perfume bottles on the market, especially those that are filled from the bottom, have very complex filling and exhaust structures, and require a good sealing effect to ensure that the internal liquid does not leak. As a result, perfume bottles with good sealing performance are expensive to produce and are very inconvenient and difficult to assemble during production, resulting in low product production efficiency.

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

[0005] Utility Model Content

[0006] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide an improved filling valve structure for a spray bottle.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] An improved filling valve structure for a spray bottle includes a bottle body and a spray head assembly mounted on the bottle body. A partition plate is provided at the lower end of the bottle body to divide the bottle body into an upper chamber and a lower chamber. The partition plate has a through hole extending vertically therethrough to allow liquid to flow from the lower chamber to the upper chamber. A tail valve assembly is provided at the lower end of the bottle body, and the tail valve assembly is disposed in the lower chamber of the bottle body.

[0009] The tail valve assembly includes a tail cover and a piston, which is arranged between the tail cover and the partition plate. The piston has an exhaust hole and a liquid injection hole that pass through the upper and lower parts. The side wall of the piston is provided with a horizontal liquid inlet hole that is connected to the liquid injection hole. A first sealing ring is provided between the outer surface of the middle end of the piston and the inner side wall of the tail cover. The first sealing ring respectively contacts the inner wall of the tail cover and the outer surface of the piston to form a sealed cavity; the lower end of the piston is provided with a second sealing ring, which is used to contact the lower end of the tail cover to form a sealed cavity to prevent liquid leakage.

[0010] As a preference, the second sealing ring is arranged on the outer surface of the lower end portion of the piston, and the second sealing ring contacts the inner side wall of the tail cover to form a seal.

[0011] As a preference, the second sealing ring is arranged on the lower end surface of the piston, and the second sealing ring contacts the inner end bottom surface of the tail cover to form a seal.

[0012] As a preferred embodiment, the piston is in a multi-stage stepped shape, the upper end surface of the piston is provided with a mounting groove, a return spring is provided in the mounting groove, one end of the return spring rests in the mounting groove of the piston, and the other end rests against the lower end surface of the partition plate, the lower end surface of the partition plate is provided with a guide column for positioning the return spring set, the return spring always has a downward force to make the lower end of the piston rest against the inner end surface of the tail cover to form a closed state.

[0013] As a preference, the lower end of the piston is in a frustum structure, the second sealing ring is provided on the frustum structure of the piston, and the second sealing ring is located between the piston and the inner wall of the tail cover and contacts each other to form a sealed state.

[0014] Preferably, the number of the first sealing ring is set to at least one, and the first sealing ring is arranged above and / or below the horizontal liquid inlet hole, and is used to contact the inner wall of the tail cover to form a sealing area to prevent the liquid in the bottle from leaking out of the bottle body.

[0015] As a preference, the first sealing ring and the piston are made of an elastic material and integrally formed.

[0016] As a preference, the first sealing ring and the inner side wall of the tail cover are made by integral molding.

[0017] As a preference, the lower end portion of the piston is arranged to be in a convex shape, the injection hole is arranged at the center of the convex shape, and the lower end surface of the piston is arranged to be in a conical pit concave toward the injection hole. The conical pit facilitates the filling equipment to automatically align with the center of the hole for injection.

[0018] As a preference, a second sealing ring is further provided between the lower end portion of the piston and the inner side wall of the tail cover. The second sealing ring is sleeved on the piston and is used to contact the inner side wall of the tail cover to form a sealed state to prevent liquid leakage.

[0019] As a preference, it further includes an exhaust pipe, one end of which is inserted into the exhaust hole, and the other end of which extends upward to the upper end of the bottle body to exhaust the air inside the bottle body when filling with liquid.

[0020] As a preference, the number of through holes on the partition plate is set to at least one, and the upper end surface of the partition plate is further provided with a reinforcing connecting plate, which is distributed at intervals on the partition plate and is connected and fixed to the inner wall of the bottle body.

[0021] As a preferred embodiment, the spray head assembly is connected to the bottle body by a snap-fit ​​connection, and the spray head assembly includes a nozzle, a pump body and a straw for sucking liquid from the bottle body.

[0022] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that the present invention has a simple structure and is easy to use. The tail valve assembly is installed at the lower end of the bottle body, and a variety of sealing structures are provided on the tail valve assembly, so that the poured liquid will not leak out. An exhaust hole for exhausting outwards is also provided on the tail valve assembly, which can effectively discharge the air in the bottle body to the outside, so that the bottle body has good sealing performance and can also discharge the air in the bottle to the outside for filling liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] FIG1 is a schematic diagram of the overall structure of the first embodiment of the present utility model.

[0025] FIG2 is a schematic diagram of the exploded structure of the first embodiment of the present invention.

[0026] FIG3 is a schematic structural diagram of the tail valve assembly of the first embodiment of the present invention.

[0027] FIG4 is a schematic diagram of the full cross-section structure of the first embodiment of the present invention.

[0028] FIG5 is a schematic diagram of the overall structure of the second embodiment of the present utility model.

[0029] FIG6 is a schematic diagram of the exploded structure of the second embodiment of the present invention.

[0030] FIG7 is a schematic structural diagram of a tail valve assembly according to a second embodiment of the present invention.

[0031] FIG8 is a schematic diagram of the full cross-section structure of the second embodiment of the present invention.

[0032] FIG9 is a schematic diagram of the overall structure of the third embodiment of the present utility model.

[0033] FIG10 is a schematic diagram of the exploded structure of the third embodiment of the present invention.

[0034] FIG11 is a schematic structural diagram of a tail valve assembly according to a third embodiment of the present invention.

[0035] FIG12 is a schematic diagram of the full cross-section structure of the third embodiment of the present utility model.

[0036] Among them, the reference numerals in the figures are:

[0037] 100. Bottle body; 110. Upper chamber; 120. Lower chamber; 130. Partition plate; 140. Through hole; 150. Guide column; 160. Reinforced connecting plate; 200. Nozzle assembly; 300. Tail valve assembly; 310. Tail cover; 320. Piston; 321. Exhaust hole; 322. Liquid injection hole; 323. Horizontal liquid inlet hole; 324. First sealing ring; 325. Mounting groove; 326. Second sealing ring; 400. Return spring; 500. Exhaust pipe. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Example 1: Referring to Figures 1-4, an improved filling valve structure for a spray bottle includes a bottle body 100 and a spray head assembly 200 installed on the bottle body 100. A partition plate 130 is provided at the lower end of the bottle body 100 to divide the bottle body 100 into an upper chamber 110 and a lower chamber 120, and a through hole 140 is provided on the partition plate 130 to allow liquid to flow from the lower chamber 120 to the upper chamber 110. A tail valve assembly 300 is also provided at the lower end of the bottle body 100. By arranging the tail valve assembly 300 in the lower chamber 120 of the bottle body 100, the effect of filling the bottle body 100 with liquid is achieved.

[0044] In this embodiment, a second sealing ring 326 is provided between the lower end of the piston 320 and the inner wall of the tail cover 310. The second sealing ring 326 is mounted on the piston 320 so that it can contact the inner wall of the tail cover 310 to form a sealed state, thereby preventing liquid leakage in static state.

[0045] Furthermore, the tail valve assembly 300 includes a tail cover 310 and a piston 320. The piston 320 is disposed between the tail cover 310 and the partition plate 130, and an exhaust hole 321 is provided on the piston 320. And the injection hole 322, and a horizontal liquid inlet hole 323 extending to the side wall is provided in the piston 320, and the horizontal liquid inlet hole 323 is connected to the injection hole 322, and the liquid is filled into the injection hole 322 through the filling equipment, so that the liquid can flow into the lower chamber 120 from the horizontal liquid inlet holes 323 on both sides, and finally flow into the upper chamber 110 through the partition plate 130 for storage, and a first sealing ring 324 is provided between the outer surface of the piston 320 and the inner side wall of the tail cover 310, so that the first sealing ring 324 respectively contacts the inner wall of the tail cover 310 and the outer surface of the piston 320 to form a seal. When filling with liquid, the piston 320 will be pushed upward, so that the first sealing ring 324 is away from the side wall of the tail cover 310, so that the liquid poured in through the horizontal liquid inlet hole 323 can flow smoothly into the lower chamber 120.

[0046] In this embodiment, the piston 320 is arranged in a multi-stage stepped shape, and the first sealing ring 324 is arranged at the middle end position of the piston 320, so that the first sealing ring 324 can fit between the piston 320 and the tail cover 310 to form a sealed state. In addition, a mounting groove 325 is provided on the upper end surface of the piston 320, and a return spring 400 is provided in the mounting groove 325. One end of the return spring 400 is pressed against the mounting groove 325 of the piston 320, and the other end is pressed against the lower end surface of the partition plate 130. In addition, a retaining member 400 is provided on the lower end surface of the partition plate 130 for the return spring 400 to fit. The positioned guide post 150 is assembled quickly by inserting one end of the return spring 400 into the guide post 150 and placing the other end into the mounting groove 325. The return spring 400 always has a downward force, so that the lower end of the piston 320 can always abut against the inner wall of the tail cover 310 to form a sealed state when it is static. When filling liquid, the piston 320 will be pushed upward to move away from the sealing area formed with the side wall of the tail cover 310, so that the liquid can enter the bottle body 100 for storage, and the air in the bottle body 100 can flow out of the bottle body 100 through the exhaust hole 321.

[0047] Furthermore, the lower end of the piston 320 is set to a frustum structure, and the second sealing ring 326 is set on the lower outer surface of the piston 320 of the frustum structure, so that the second sealing ring 326 is located between the piston 320 and the inner wall of the tail cover 310, so that it can form a good sealing state, and the shape and structure of the tail cover 310 are adapted to the structure of the piston 320 to provide better sealing performance.

[0048] Specifically, the number of the first sealing ring 324 is set to at least one. In this embodiment, two first sealing rings 324 are used, and the two first sealing rings 324 are respectively set at the upper and lower ends of the horizontal liquid inlet hole 323, so that the horizontal liquid inlet hole 323 can be in contact with the inner wall of the tail cover 310 to form a sealing area, effectively preventing the liquid in the bottle body 100 from leaking out of the bottle body.

[0049] Furthermore, the first sealing ring 324 and the piston 320 can be installed using a conventional set installation method.

[0050] Specifically, the first sealing ring 324 and the piston 320 can also be integrally formed with an elastic material, wherein the hardness value of the elastic material can be 80, 75, 70, 65, 60, etc. The piston 320 made of elastic materials with different hardness values ​​has different softness, thereby increasing the use range and adaptation effect of the piston 320.

[0051] In this embodiment, the first sealing ring 324 and the inner side wall of the tail cover 310 may be integrally formed.

[0052] In actual use, by setting the lower end of the piston 320 as a raised cone, and setting the injection hole 322 at the center of the cone, and setting the lower end surface of the piston 320 as a conical pit concave toward the injection hole 322, the conical pit allows the filling equipment to automatically align with the center of the hole for injection, thereby improving the precise positioning of the filling and the filling efficiency.

[0053] In this embodiment, an exhaust pipe 500 is further included. By inserting one end of the exhaust pipe 500 into the exhaust hole 321 and extending the other end upward to the upper end of the bottle body 100, the exhaust pipe 500 can discharge the air inside the bottle body 100 when filling with liquid. During filling, liquid is injected into the bottle body 100 through the filling equipment, so that the air in the bottle body 100 flows upward and finally flows into the exhaust pipe 500 and is discharged to the outside of the bottle body 100 through the exhaust hole 321 and the gap between the piston 320 and the tail cover 310.

[0054] In this embodiment, the number of through holes 140 on the partition plate 130 is set to at least one. The use of multiple through holes 140 can increase the flow rate of the liquid and improve the filling efficiency. In addition, a reinforcing connecting plate 160 is provided on the upper end surface of the partition plate 130. The reinforcing connecting plates 160 are distributed at intervals on the partition plate 130 and are connected and fixed to the inner wall of the bottle body 100 to improve the connection strength of the partition plate 130 and ensure the stability of the bottle body 100.

[0055] In this embodiment, the nozzle assembly 200 is connected to the bottle body 100 by a snap-fit ​​connection, wherein the nozzle assembly 200 includes a nozzle, a pump body and a straw for sucking the liquid in the bottle body 100. The liquid in the bottle body 100 can be sucked up through the straw by the pump body and finally sprayed out from the nozzle to form an atomization effect.

[0056] Example 2: Referring to Figures 5-8, an improved filling valve structure for a spray bottle includes a bottle body 100 and a spray head assembly 200 installed on the bottle body 100. A partition plate 130 is provided at the lower end of the bottle body 100 to divide the bottle body 100 into an upper chamber 110 and a lower chamber 120, and a through hole 140 is provided on the partition plate 130 to allow liquid to flow from the lower chamber 120 to the upper chamber 110. A tail valve assembly 300 is also provided at the lower end of the bottle body 100. By arranging the tail valve assembly 300 in the lower chamber 120 of the bottle body 100, the effect of filling the bottle body 100 with liquid is achieved.

[0057] In this embodiment, a second sealing ring 326 is provided between the lower end of the piston 320 and the inner wall of the tail cover 310. The second sealing ring 326 is mounted on the piston 320 so that it can contact the inner wall of the tail cover 310 to form a sealed state, thereby preventing liquid leakage in static state.

[0058] Furthermore, the tail valve assembly 300 includes a tail cover 310 and a piston 320, the piston 320 is arranged between the tail cover 310 and the partition plate 130, and an exhaust hole 321 and a liquid injection hole 322 are provided on the piston 320, and a horizontal liquid inlet hole 323 extending to the side wall is provided in the piston 320, and the horizontal liquid inlet hole 323 is connected to the liquid injection hole 322, and the liquid injection hole 322 is filled with liquid by a filling device, so that the liquid can flow into the lower chamber 120 from the horizontal liquid inlet holes 323 on both sides. Finally, it flows into the upper chamber 110 through the partition plate 130 for storage. A first sealing ring 324 is provided between the outer surface of the piston 320 and the inner side wall of the tail cover 310, so that the first sealing ring 324 respectively contacts the inner wall of the tail cover 310 and the outer surface of the piston 320 to form a seal. When the liquid is filled, the piston 320 will be pushed upward, so that the first sealing ring 324 is away from the side wall of the tail cover 310, so that a gap appears between the two, so that the liquid poured in through the horizontal liquid inlet hole 323 can flow smoothly into the lower chamber 120.

[0059] In this embodiment, the piston 320 is provided in a multi-stage stepped shape, and the middle end portion of the piston 320 is an inclined surface and a downward cylindrical surface that shrinks inward from top to bottom, and the first sealing ring 324 is provided on the inclined surface and the downwardly extending cylindrical surface of the middle end portion of the piston 320, so that the first sealing ring 324 can fit between the piston 320 and the tail cover 310 to form a sealed state. In addition, a mounting groove 325 is provided on the upper end surface of the piston 320, and a return spring 400 is provided in the mounting groove 325. One end of the return spring 400 is pressed against the mounting groove 325 of the piston 320, and the other end is pressed against the lower end surface of the partition plate 130, and the first sealing ring 324 is provided on the partition plate 130. The lower end surface of the partition 130 is also provided with a guide column 150 for positioning the return spring 400. By fitting one end of the return spring 400 into the guide column 150 and placing the other end into the mounting groove 325, quick assembly is achieved, and the return spring 400 always has a downward force, so that the lower end of the piston 320 can always abut against the inner wall of the tail cover 310 to form a sealed state when it is static; when filling liquid, the piston 320 will be pushed upward, away from the sealing area formed with the side wall of the tail cover 310, so that the liquid can enter the bottle body 100 for storage, and the air in the bottle body 100 can flow out of the bottle body 100 through the exhaust hole 321.

[0060] Furthermore, the lower end of the piston 320 is provided with a conical structure that gradually contracts toward the center, and the second sealing ring 326 is provided on the lower outer surface of the piston 320 of the conical structure, so that the second sealing ring 326 is located between the piston 320 and the inner side wall of the tail cover 310, so that it can form a good sealing state, and the shape and structure of the tail cover 310 are adapted to the structure of the piston 320 to provide better sealing performance.

[0061] Specifically, the number of the first sealing ring 324 is set to at least one. In this embodiment, two first sealing rings 324 are used, and the two first sealing rings 324 are respectively set at the upper and lower ends of the horizontal liquid inlet hole 323, so that the horizontal liquid inlet hole 323 can contact the inner wall of the tail cover 310 to form a sealing area, effectively preventing the liquid in the bottle body 100 from leaking out of the bottle body.

[0062] Specifically, an inclined surface inclined from the inside to the outside is provided at the inner upper end of the tail cover 310. When static, the two first sealing rings 324 located on the piston 320 respectively contact the inclined surface of the upper end portion and the lower vertical end surface of the tail cover 310 to form a seal; when filling with liquid, the first sealing ring 324 located at the upper end of the piston 320 will move upward with the piston 320, thereby moving away from the inner end surface of the tail cover 310, and forming a gap between the two for liquid to flow into the lower chamber 120, and the first sealing ring 324 located at the lower part of the piston 310 is always in contact with the inner side wall of the tail cover 310 to form a sealed state; and the second sealing ring 326 also moves with the movement of the piston 320, away from the side wall of the tail cover 310 to form a gap for air to flow out of the bottle body 100.

[0063] Furthermore, the first sealing ring 324 and the piston 320 can be installed using a conventional set installation method.

[0064] Specifically, the first sealing ring 324 and the piston 320 can also be integrally formed with an elastic material, wherein the hardness value of the elastic material can be 80, 75, 70, 65, 60, etc. The piston 320 made of elastic materials with different hardness values ​​has different softness, thereby increasing the use range and adaptation effect of the piston 320.

[0065] In this embodiment, the first sealing ring 324 and the inner side wall of the tail cover 310 may be integrally formed.

[0066] In actual use, by setting the lower end of the piston 320 as a raised cone, and setting the injection hole 322 at the center of the cone, and setting the lower end surface of the piston 320 as a conical pit concave toward the injection hole 322, the conical pit allows the filling equipment to automatically align with the center of the hole for injection, thereby improving the precise positioning of the filling and the filling efficiency.

[0067] In this embodiment, an exhaust pipe 500 is also included. By inserting one end of the exhaust pipe 500 into the exhaust hole 321 and extending the other end upward to the upper end of the bottle body 100, the air at the top of the bottle body 100 can be discharged. When filling and using, liquid is injected into the bottle body 100 through the filling equipment, so that the air in the bottle body 100 flows upward, and finally flows into the exhaust pipe 500 and is discharged to the outside of the bottle body 100 through the exhaust hole 321.

[0068] In this embodiment, the number of through holes 140 on the partition plate 130 is set to at least one. The use of multiple through holes 140 can increase the flow rate of the liquid and improve the filling efficiency. In addition, a reinforcing connecting plate 160 is provided on the upper end surface of the partition plate 130. The reinforcing connecting plates 160 are distributed at intervals on the partition plate 130 and are connected and fixed to the inner wall of the bottle body 100 to improve the connection strength of the partition plate 130 and ensure the stability of the bottle body 100.

[0069] In this embodiment, the nozzle assembly 200 is connected to the bottle body 100 by a snap-fit ​​connection, wherein the nozzle assembly 200 includes a nozzle, a pump body and a straw for sucking the liquid in the bottle body 100. The liquid in the bottle body 100 can be sucked up through the straw by the pump body and finally sprayed out from the nozzle to form an atomization effect.

[0070] Example 3: Referring to Figures 9-12, an improved filling valve structure for a spray bottle includes a bottle body 100 and a spray head assembly 200 installed on the bottle body 100. A partition plate 130 is provided at the lower end of the bottle body 100 to divide the bottle body 100 into an upper chamber 110 and a lower chamber 120, and a through hole 140 is provided on the partition plate 130 to allow liquid to flow from the lower chamber 120 to the upper chamber 110. A tail valve assembly 300 is also provided at the lower end of the bottle body 100. By arranging the tail valve assembly 300 in the lower chamber 120 of the bottle body 100, the effect of filling the bottle body 100 with liquid is achieved.

[0071] In this embodiment, a second sealing ring 326 is provided on the lower end surface of the piston 320. The second sealing ring 326 is set between the piston 320 and the inner bottom surface of the tail cover 310. When static, it can contact the inner bottom surface of the tail cover 310 to form a sealed state to prevent liquid leakage; when filling liquid, the second sealing ring 326 is away from the inner bottom surface of the tail cover 310, and the internal air can flow out of the bottle body 100 from the gap.

[0072] Furthermore, the tail valve assembly 300 includes a tail cover 310 and a piston 320. The piston 320 is disposed between the tail cover 310 and the partition plate 130, and an exhaust hole 321 is provided on the piston 320. The cam 324 is a sealant formed on the outer surface of the piston 320 and the outer surface of the piston 320. The cam 324 is a sealant formed on the outer surface of the piston 320 and the outer surface of the piston 320. When the cam 324 is closed, the cam 324 is in a closed position and the seal is formed between the cam 324 and the outer surface of the piston 320. When the cam 324 is closed, ...0 is closed, the cam 324 is in a closed position and the seal is formed between the cam 324 and the outer surface of the piston 320. When the cam 320 is closed, the cam 324 is in a closed position and the seal is formed between the

[0073] In this embodiment, the piston 320 is arranged in a multi-stage stepped shape, and the first sealing ring 324 is arranged at the middle end position of the piston 320, so that the first sealing ring 324 can fit between the piston 320 and the tail cover 310 to form a sealed state. In addition, a mounting groove 325 is provided on the upper end surface of the piston 320, and a return spring 400 is provided in the mounting groove 325. One end of the return spring 400 is pressed against the mounting groove 325 of the piston 320, and the other end is pressed against the lower end surface of the partition plate 130. In addition, a retaining member 400 is provided on the lower end surface of the partition plate 130 for the return spring 400 to fit. The positioned guide post 150 is assembled quickly by inserting one end of the return spring 400 into the guide post 150 and placing the other end into the mounting groove 325. The return spring 400 always has a downward force, so that the lower end of the piston 320 can always abut against the inner wall of the tail cover 310 to form a sealed state when it is static. When filling liquid, the piston 320 will be pushed upward to move away from the sealing area formed with the side wall of the tail cover 310, so that the liquid can enter the bottle body 100 for storage, and the air in the bottle body 100 can flow out of the bottle body 100 through the exhaust hole 321.

[0074] Furthermore, the lower end of the piston 320 is set to a frustum structure, and the second sealing ring 326 is set on the lower bottom end surface of the piston 320 of the frustum structure, so that the second sealing ring 326 is located between the piston 320 and the inner bottom wall of the tail cover 310, so that it can form a good sealing state, and the shape and structure of the tail cover 310 are adapted to the structure of the piston 320 to provide better sealing performance.

[0075] Specifically, the number of the first sealing ring 324 is set to at least one. In this embodiment, two first sealing rings 324 are used, and the two first sealing rings 324 are respectively set at the upper and lower ends of the horizontal liquid inlet hole 323, so that the horizontal liquid inlet hole 323 can be in contact with the inner wall of the tail cover 310 to form a sealing area, effectively preventing the liquid in the bottle body 100 from leaking out of the bottle body.

[0076] Furthermore, the first sealing ring 324 and the piston 320 can be installed using a conventional set installation method.

[0077] Specifically, the first sealing ring 324 and the piston 320 can also be integrally formed with an elastic material, wherein the hardness value of the elastic material can be 80, 75, 70, 65, 60, etc. The piston 320 made of elastic materials with different hardness values ​​has different softness, thereby increasing the use range and adaptation effect of the piston 320.

[0078] In this embodiment, the first sealing ring 324 and the inner side wall of the tail cover 310 may be integrally formed.

[0079] In actual use, by setting the lower end of the piston 320 as a raised cone, and setting the injection hole 322 at the center of the cone, and setting the lower end surface of the piston 320 as a conical pit concave toward the injection hole 322, the conical pit allows the filling equipment to automatically align with the center of the hole for injection, thereby improving the precise positioning of the filling and the filling efficiency.

[0080] In this embodiment, an exhaust pipe 500 is also included. By inserting one end of the exhaust pipe 500 into the exhaust hole 321 and extending the other end upward to the upper end of the bottle body 100, the air at the top of the bottle body 100 can be discharged. When filling and using, liquid is injected into the bottle body 100 through the filling equipment, so that the air in the bottle body 100 flows upward, and finally flows into the exhaust pipe 500 and is discharged to the outside of the bottle body 100 through the exhaust hole 321.

[0081] In this embodiment, the number of through holes 140 on the partition plate 130 is set to at least one. The use of multiple through holes 140 can increase the flow rate of the liquid and improve the filling efficiency. In addition, a reinforcing connecting plate 160 is provided on the upper end surface of the partition plate 130. The reinforcing connecting plates 160 are distributed at intervals on the partition plate 130 and are connected and fixed to the inner wall of the bottle body 100 to improve the connection strength of the partition plate 130 and ensure the stability of the bottle body 100.

[0082] In this embodiment, the nozzle assembly 200 is connected to the bottle body 100 by a snap-fit ​​connection, wherein the nozzle assembly 200 includes a nozzle, a pump body and a straw for sucking the liquid in the bottle body 100. The liquid in the bottle body 100 can be sucked up through the straw by the pump body and finally sprayed out from the nozzle to form an atomization effect.

[0083] 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. An improved filling valve structure for a spray bottle, comprising a bottle body and a spray head assembly mounted on the bottle body, a partition plate is provided at the lower end of the bottle body for dividing the bottle body into an upper chamber and a lower chamber, and a through hole is provided on the partition plate for allowing liquid to flow from the lower chamber to the upper chamber, characterized in that: The lower end of the bottle body is provided with a tail valve assembly, and the tail valve assembly is arranged in the lower chamber of the bottle body; The tail valve assembly includes a tail cover and a piston, the piston is arranged between the tail cover and the partition plate, the piston is provided with an exhaust hole and a liquid injection hole which pass through from top to bottom, the side wall of the piston is provided with a transverse liquid inlet hole which is connected with the liquid injection hole, a first sealing ring is provided between the outer surface of the middle end of the piston and the inner wall of the tail cover, the first sealing ring respectively contacts with the inner wall of the tail cover and the outer surface of the piston to form a sealed cavity; the lower end of the piston is provided with a second sealing ring which is used to contact with the lower end of the tail cover to form a sealed cavity to prevent liquid leakage.

2. The improved filling valve structure of the spray bottle according to claim 1, characterized in that: The second sealing ring is arranged on the outer surface of the lower end of the piston, and the second sealing ring contacts the inner side wall of the tail cover to form a seal.

3. The improved filling valve structure of the spray bottle according to claim 1, characterized in that: The second sealing ring is arranged on the lower end surface of the piston, and the second sealing ring contacts with the inner end bottom surface of the tail cover to form a seal.

4. The improved filling valve structure of the spray bottle according to claim 2 or 3, characterized in that: The piston is in a multi-stage stepped shape, and a mounting groove is provided on the upper end surface of the piston. A return spring is provided in the mounting groove. One end of the return spring abuts against the mounting groove of the piston, and the other end abuts against the lower end surface of the partition plate. The lower end surface of the partition plate is provided with a guide column for positioning the return spring set. The return spring always has a downward force to make the lower end of the piston abut against the inner end surface of the tail cover to form a closed state.

5. The improved filling valve structure of the spray bottle according to claim 4, characterized in that: The lower end of the piston is in a frustum structure, the second sealing ring is arranged on the frustum structure of the piston, and the second sealing ring is located between the piston and the inner wall of the tail cover to contact each other to form a closed state.

6. The improved filling valve structure of the spray bottle according to claim 4, characterized in that: The number of the first sealing ring is set to at least one, and the first sealing ring is set above and / or below the transverse liquid inlet hole, and is used to contact with the inner wall of the tail cover to form a sealing area to prevent the liquid in the bottle from leaking out of the bottle body.

7. The improved filling valve structure of the spray bottle according to claim 5, characterized in that: The lower end of the piston is a convex cone, the injection hole is arranged at the center of the cone, and the lower end surface of the piston is arranged as a conical pit concave toward the injection hole. The conical pit facilitates the filling equipment to automatically align with the center of the hole for injection.

8. The improved filling valve structure of the spray bottle according to claim 1, characterized in that: It also includes an exhaust pipe, one end of which is inserted into the exhaust hole, and the other end of which extends upward to the upper end of the bottle body to exhaust the air inside the bottle body when filling with liquid.

9. The improved filling valve structure of the spray bottle according to claim 1, characterized in that: The number of through holes on the partition plate is set to at least one, and the upper end surface of the partition plate is also provided with a reinforcing connecting plate, which is distributed on the partition plate at intervals and is connected and fixed to the inner side wall of the bottle body.

10. The improved filling valve structure of the spray bottle according to claim 1, characterized in that: The spray head assembly is connected to the bottle body by a snap-fit ​​connection. The spray head assembly includes a nozzle, a pump body, and a straw for sucking liquid from the bottle body.

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