Liquid container and back spray mechanism for liquid container

Abstract

This invention proposes a backspray mechanism, comprising a main body, at least one retaining ring, and at least one backspray hose. The main body has a common channel seat, a switching seat, and at least one backspray seat. The common channel seat includes a common channel and a forward spray connection port. The switching seat is arranged side by side with the common channel seat and includes a bead channel, a backspray connection port, a stop portion, and a bead. The bead channel is connected to the common channel through the backspray connection port, and the bead is located in the bead channel. The backspray seat is connected to the switching seat, and one of its access ends is away from the switching seat and inclined. The retaining ring is disposed within the backspray seat, and the backspray hose passes through the retaining ring. By configuring the backspray seat and the backspray hose, when this invention is used in the backspray state or in any inclined backspray state, even if the liquid volume in the tank is small, the liquid can still be sprayed smoothly.

Description

[Technical Field]

[0001] This invention relates to a liquid container and the technical field thereof, particularly to a back spray mechanism that is equipped with at least one back spray hose so that it can draw liquid at the bottom periphery of the fixed cover of the aerosol valve when the can is in a back spray state or when the back spray is in any tilted state, and a liquid container including the back spray mechanism. [Previous Technology]

[0002] Please refer to Figure 31. A liquid container that can realize both upright and inverted spraying functions in the conventional art includes a tank body 90, a ball valve 91, a nozzle 92, and a forward spray suction pipe 93. A ball valve 91 is installed at the top opening of the tank body 90. The nozzle 92 is located at the top of the ball valve 91 and outside the tank body 90. The bending direction of the tail end of the slightly curved positive spray suction pipe 93 is usually fixed to the same side as the spray outlet 921 of the nozzle 92 at the top of the tank body 90. The positive spray suction port 931 at the tail end of the positive spray suction pipe 93 is close to the corner where the tank body and the bottom of the tank are connected. Therefore, when the tank body 90 is used for positive spray, the positive spray suction port 931 is immersed in the liquid P. The liquid P is then sprayed from the spray outlet 921 of the nozzle 92 to the bottom of the tank through the common channel 9111, the liquid inlet 9112 and the liquid outlet 9113.

[0003] Please refer to Figure 32. However, in conventional technology, although the liquid container can be used in the forward spray state, the structure of the ball valve 91 is such that the ball 94 is placed in the ball channel 9114 of the valve seat 911. There is a back spray suction port 9116 on one side of the valve seat 911, and the back spray suction port 9116 and the spray outlet 921 of the nozzle 92 face the same direction. Therefore, when the tank 90 is used in the back spray state, the ball 94 slides down towards the ground and gets out of the back spray connection port 9115. Thus, the back spray suction port 9116 is immersed in the liquid P and then the liquid P can be smoothly sprayed out from the spray outlet 921 of the nozzle 92 through the back spray connection port 9115, the common channel 9111, the liquid inlet 9112 and the liquid outlet 9113. Please refer to Figures 33 and 34. However, when the liquid P in the can 90 is only half or less, if the can 90 is held in the reverse spray state or at any tilt, the reverse spray intake 9116 is not submerged in the liquid P. Therefore, even if the nozzle 92 is pressed, the liquid P cannot be drawn in and sprayed. This causes inconvenience and trouble in use, and liquid P will remain in the can 90, resulting in waste.

[0004] Therefore, conventional liquid containers need to be improved. [Summary of the Invention]

[0005] In view of the aforementioned shortcomings and deficiencies of conventional technology, the present invention provides a liquid container and a back spray mechanism for the liquid container, which is provided with a back spray hose connected to a back spray base and the front end of the back spray hose extending towards the bottom of the fixed cover of the aerosol valve and the corner of the inner wall of the can, so that when the can is in a back spray state or in a back spray state at any tilt, the back spray hose can smoothly draw in and spray the liquid in the can at the corner of the bottom of the fixed cover and the inner wall of the can.

[0006] To achieve the above-mentioned creative objective, the technical means adopted in this invention is to design a back spray mechanism for a liquid container, which is disposed in a can body and connected to an aerosol valve; the back spray mechanism includes: a body having: a common channel seat, which includes: a common channel formed inside the common channel seat and connected to the aerosol valve; a forward spray port connected to the common channel; a switching seat arranged side by side with the common channel seat, the switching seat including: a bead channel formed inside the switching seat and connected to the aerosol valve; and a back spray port formed at the bottom end of the switching seat, the back spray port connecting the bead channel and the common channel; a stop portion disposed at the top opening of the switching seat; a bead movably disposed in the bead channel and selectively connecting or blocking the back spray port; and at least one back spray seat including: A beveled end connected to the switching seat; an inlet end located away from the switching seat and inclined at an angle to it; a backspray liquid channel formed inside the at least one backspray seat, the backspray liquid channel communicating with the backspray connection port; an inner engaging portion formed on the inner ring side of the backspray seat; and a stagnant ring surface formed around the inside of the backspray seat; at least one fixing ring disposed on the at least one backspray seat, the at least one fixing ring having: a fixing hole formed through the at least one fixing ring, the fixing hole having a fixing inlet and a fixing outlet at its two ends respectively; and an outer engaging portion formed on the outer ring side of the at least one fixing ring. A groove is formed through the side wall of the at least one fixed ring and located at the periphery of the fixed outlet; and at least one back spray hose is disposed on the back spray seat of the body, the end of the at least one back spray hose passes through the at least one fixed ring and protrudes from the fixed outlet, and the end of the at least one back spray hose is connected to the back spray communication port, and the front end of the at least one back spray hose forms a back spray suction port.

[0007] To achieve the above-mentioned creative objective, the technical means adopted in this creation is to design a liquid container, which includes: a can body, which is a hollow body and has an installation opening; an aerosol valve, which is sealed and fixed to the installation opening of the can body, the aerosol valve has a liquid inlet and a liquid outlet, the liquid inlet is located in the internal space of the can body, and the liquid outlet is located outside the can body; the liquid inlet is connected to the liquid outlet; a valve seat, which is located at the bottom of the fixed cover of the aerosol valve, the valve seat has a protrusion and an extension tube, the protrusion is formed on the outer peripheral surface of the valve seat, the extension tube is formed at the bottom of the valve seat, and the liquid inlet is located at the bottom end of the extension tube; a back spray mechanism, which is connected to the aerosol valve, the back spray mechanism having: a body, the body having: a common channel seat, which includes: a common channel formed inside the common channel seat and connected to the liquid inlet of the aerosol valve; A forward spray port connected to the common channel; a switching seat arranged side-by-side with the common channel seat, the switching seat comprising: a bead channel formed inside the switching seat and connected to the common channel and the liquid inlet of the aerosol valve; a back spray port formed at the bottom end of the switching seat, the back spray port connecting the bead channel and the common channel; a stop portion disposed at the top opening of the switching seat; and a bead movably disposed within the bead channel and selectively connecting or blocking the back spray port; and at least one back spray seat comprising: a bevel end connected to the switching seat; an inlet end located away from the switching seat and inclined at an angle to the switching seat; and a back spray liquid channel formed inside the at least one back spray seat, the back spray liquid channel connecting to the back spray port; An inner engaging portion is formed on the inner ring side of the back spray seat; and a stagnant ring surface is formed around the back spray seat; at least one fixing ring is disposed in the at least one back spray seat, the at least one fixing ring having: a fixing hole formed through the at least one fixing ring, the fixing hole having a fixing inlet and a fixing outlet at its two ends respectively; an outer engaging portion is formed on the outer ring side of the at least one fixing ring; a groove formed through the side wall of the at least one fixing ring and located at the periphery of the fixing outlet; and at least one back spray hose is disposed in the back spray seat of the body, the end of the at least one back spray hose passes through the at least one fixing ring and protrudes outward from the fixing outlet, and the at least one back spray hose is interconnected with the back spray communication port, the front end of the at least one back spray hose is formed with a back spray suction port; and a forward spray suction pipe is disposed in the inner hole of a forward spray connecting pipe of the body and is connected to the aerosol valve.

[0008] Therefore, the advantage of this invention is that, through the setting of the tilted spray seat and the spray hose, especially when the liquid capacity in the can is only half or less, when the spray can is held in the spray state or used in any tilted position, the liquid flows to the bottom of the fixed cover of the aerosol valve and the corner of the inner wall of the can. Therefore, the spray suction port can be immersed in the liquid and spray the liquid smoothly. In short, this invention can spray out almost all the liquid in the can, avoiding waste caused by too much liquid remaining in the can. This advantage is not available in existing liquid container spray devices.

[0009] As described above, the back spray mechanism, wherein the at least one back spray hose is a soft, flexible low-density polyethylene (LDPE) tube, and the inner diameter of the at least one back spray hose is between 1.40 and 1.50 mm, and the outer diameter of the at least one back spray hose is between 2.00 and 2.10 mm.

[0010] As described above, in the back spray mechanism, the inner diameter of the fixing hole of the at least one fixing ring gradually decreases from the fixing inlet to the fixing outlet; wherein, when the at least one back spray hose is not inserted through the at least one fixing ring, the inner diameter of the fixing outlet is smaller than the outer diameter of the at least one back spray hose.

[0011] As described above, in the reverse spray mechanism, the outer engaging portion of the at least one fixed ring is an annular flange; the inner engaging portion of the reverse spray seat is an annular groove, thereby the outer engaging portion of the at least one fixed ring can engage with the inner engaging portion of the at least one reverse spray seat.

[0012] As described above, the number of the at least one back spray seat is two, the number of the at least one fixing ring is two, and the number of the at least one back spray hose is two; the back spray hoses are respectively passed through the fixing rings, and the fixing rings are respectively disposed inside the back spray seats.

[0013] As described above, the liquid container has a protrusion formed on the outer peripheral surface of the valve seat, the protrusion being located at the top opening of the switching seat, thereby preventing the bead from disengaging from the bead channel through the top opening.

[0014] As described above, in the liquid container, the extension tube of the valve seat has a recessed plane, and the inner ring side of the common channel has a raised plane corresponding to the outline of the recessed plane of the extension tube. The outer diameter of the extension tube gradually decreases from top to bottom, and the inner diameter of the common channel gradually decreases from top to bottom. When the bottom of the valve seat is engaged with the top of the common channel seat, the recessed plane and the raised plane are tightly fitted, causing the protrusion of the valve seat to be positioned in a fixed direction.

[0015] As described above, the liquid container, wherein the at least one back spray hose is a flexible, bendable, low-density polyethylene (LDPE) tube, and the inner diameter of the at least one back spray hose is between 1.40 and 1.50 mm, and the outer diameter of the at least one back spray hose is between 2.00 and 2.10 mm.

Implementation Method

[0016] The following, in conjunction with the drawings and preferred embodiments of the present invention, further illustrates the technical means adopted by the present invention to achieve the intended creative purpose.

[0017] Please refer to Figures 1 and 14. The back spray mechanism 30, 30A of the liquid container of this invention is installed inside a tank 10 and is used to connect a forward spray suction pipe 40. The liquid container may be a liquid spray can that uses compressed gas.

[0018] Please refer to Figure 7. In this invention, when the canister 10 is filled with liquid P and propellant (not shown in the figure), the user presses the nozzle 50 (Actuator). The pressure generated by the propellant within the canister 10 pushes the liquid P through the aerosol valve 20 and then through the nozzle 51 of the nozzle 50. Furthermore, the propellant is preferably a compressed gas such as an environmentally friendly refrigerant (HFO-1234yf), and the liquid P is the prepared product contents, such as insecticides and pepper spray, but this is not a limitation; other high-pressure gas products can also be used in this invention.

[0019] Please refer to Figures 1 to 3 and Figure 7. The tank 10 is a hollow body with an installation opening 11 and an internal space 13. In this embodiment, the preferred material of the tank 10 is metal.

[0020] The aerosol valve 20 is sealed and fixed to the mounting opening 11 of the canister 10. The aerosol valve 20 has a liquid inlet 221 and a liquid outlet 222. The liquid inlet 221 is located in the internal space 13 of the canister 10, and the liquid outlet 222 is located outside the canister 10. Specifically, as shown in Figures 2 and 3, the valve seat 22 is located at the bottom 211 of the fixing cover 21 of the aerosol valve 20, and the liquid inlet 221 is formed at the bottom end of the valve seat 22. The valve stem 23 is a tube with a spring 24 sleeved at the bottom end. The bottom end of the valve stem 23 is located inside the valve seat 22, and the top end of the valve stem 23 passes through the central hole on the back of the fixing cover 21 and protrudes outside the fixing cover 21. The top end of the valve stem 23 is provided with a liquid outlet 222, through which the liquid inlet 221 can connect to the liquid outlet 222.

[0021] Furthermore, this embodiment may further include a nozzle 50, which is generally a matching product for high-pressure spray cans, but is not limited thereto. In this embodiment, the nozzle 50 is installed on the liquid outlet 222 at the top of the valve stem 23, and the nozzle port 51 of the nozzle 50 is in communication with the liquid outlet 222 of the valve stem 23.

[0022] Furthermore, in this embodiment, the aerosol valve 20 has a specification of 1 inch (25.4 mm). Please refer to Figures 2 and 3. The widely used aerosol valve 20 is composed of seven components: a valve stem 23, a valve stem sealing ring, a fixed cap 21, a fixed cap sealing ring, a valve seat 22, a spring 24, and a positive spray suction tube 40 (but the valve stem sealing ring and the fixed cap sealing ring are not shown in the figures). Since the aerosol valve 20 is one of the main components related to different functions of the aerosol product, its detailed structure will not be described in further detail.

[0023] Please refer to Figures 1 and 2. In the liquid container of this invention, this embodiment uses a large-capacity aerosol valve 20 (its specification is 1 inch, i.e., 25.4 mm), which can be used with a large-capacity metal can 10. Specifically, as shown in Figure 2, the outer diameter D2 of the can 10 is 38 mm and the inner diameter is approximately 37.2 mm. The inner diameter D1 of the mounting opening 11 of the can 10 is the same as that of the aerosol valve 20, which is also 1 inch (25.4 mm). However, the outer diameter specification of the can 10 is not limited to this, and a metal can 10 with an outer diameter other than 38 mm can also be used.

[0024] Please refer to Figures 2 to 4 and Figure 7. In the first embodiment, the backspray mechanism 30 includes a body 31, at least one retaining ring 32, and at least one backspray hose 34. The body 31 includes a common channel seat 311, a switching seat 312, and at least one backspray seat 313. In this embodiment, the backspray mechanism 30 has one backspray seat 313, one retaining ring 32, and one backspray hose 34.

[0025] Please refer to Figure 10. In this invention, a recessed plane 2251 is provided on one side of the extension tube 225 of the valve seat 22, and a raised plane 3115 corresponding to the outline of the recessed plane 2251 of the extension tube 225 is provided on the inner ring side of the common channel 3111. The outer diameter of the extension tube 225 of this invention is a hollow cone that gradually narrows from top to bottom, and the inner diameter of the annular wall of the common channel 3111 is also a cone that gradually narrows from top to bottom. Therefore, the outer diameter of the extension tube 225 is smaller than the inner diameter of the top opening 3114 of the common channel 3111. When the extension tube 225 of the valve seat 22 is inserted into the common channel 3111, the two cones rub against each other and interfere. At this time, the bottom 224 of the valve seat 22 also moves downward and tightly engages with the top 3113 of the common channel seat 311. Thus, the concave plane 2251 and the convex plane 3115 fit tightly together, so the valve seat 22 will not rotate arbitrarily and will not cause leakage of liquid P in the tank 10. In this invention, the concave plane 2251 of the extension tube 225 and the protruding protrusion 223 of the valve seat 22 are parallel and face away from each other in opposite directions. Therefore, after the extension tube 225 is inserted into the common channel 3111, the protrusion 223 of the valve seat 22 is also fixedly located at the top opening 3124 of the switching seat 312 to prevent the bead 33 from falling out of the bead channel 3121.

[0026] Referring to Figures 1 to 3, in the first embodiment, the back spray mechanism 30 is disposed in the internal space 13 of the tank 10, and the top end 3113 of the common channel seat 311 engages with the bottom end 224 of the valve seat 22 of the aerosol valve 20. The common channel seat 311 has a common channel 3111 formed inside the common channel seat 311. A forward spray port 3112 is connected to the inner hole of the extension tube 225 at the bottom of the valve seat 22, and communicates with the forward spray port 3112, the common channel 3111, and the liquid inlet 221 of the aerosol valve 20.

[0027] Please refer to Figures 2 and 3. The switching seat 312 and the common channel seat 311 are arranged side by side. The switching seat 312 has a bead channel 3121, a backflow connection port 3122, a stop portion 3123, and a bead 33. The backflow connection port 3122 is located at the bottom end of the switching seat 312, and the backflow connection port 3122 connects the bead channel 3121 and the common channel 3111 of the common channel seat 3111. The bead 33 is movably disposed in the bead channel 3121 and selectively connects to or blocks the backflow connection port 3122. In this embodiment, the bead channel 3121 passes through the top end of the switching seat 312 to form a top opening 3124, and the stop portion 3123 is disposed on the inner edge of the top opening 3124 of the bead channel 3121 to prevent the bead 33 from falling out of the bead channel 3121.

[0028] Please refer to Figures 2 and 3. Specifically, in the main body 31 of this invention, as described above, the stop portion 3123 of the bead channel 3121 consists of two stop portions 3123. The bead channel 3121 has two stop portions 3123 formed on the inner edge of its top opening 3124. The two stop portions 3123 are located at opposite ends in the radial direction and protrude towards each other. Since the distance between the two stop portions 3123 is slightly smaller than the diameter of the bead 33, when assembling this invention, the assembler can easily insert the bead 33 into the bead channel 3121 by applying slight force between the two stop portions 3123, and the bead 33 will not detach from the bead channel 3121 after insertion. In this way, the bead 33 can be movably disposed within the bead channel 3121 and selectively connect to or block the backflow connection port 3122. In this embodiment, the bead 33 is preferably made of stainless steel, and the bead size used in this embodiment is 3.969mm (5 / 32 inches), but it is not limited thereto.

[0029] Please refer to Figures 3 and 10. In addition, in this embodiment, the valve seat 22 also has a protrusion 223. The protrusion 223 protrudes from the outer peripheral surface of the valve seat 22. When the bottom 224 of the valve seat 22 of the body 31 engages with the top 3113 of the common channel seat 311, the protrusion 223 of the valve seat 22 can abut against the top opening 3124 of the switching seat 312. Therefore, it can also prevent the bead 33 from leaving the bead channel 3121 through the top opening 3124.

[0030] Please refer to Figures 3 to 6. A fixing hole 321 is formed inside the fixing ring 32. A fixing inlet 3211 and a fixing outlet 3212 are formed at opposite ends of the fixing hole 321. In this embodiment, the opening diameter of the fixing outlet 3212 is slightly smaller than the opening diameter of the fixing inlet 3211. Therefore, the inner diameter of the fixing hole 321 is a hollow cone shape that tapers from the fixing inlet 3211 to the fixing outlet 3212. Furthermore, when the back spray hose 34 is not inserted into the fixing ring 32, the opening diameter of the fixing outlet 3212 is slightly smaller than the outer diameter of the back spray hose 34.

[0031] Referring to Figures 4 to 6, further, the fixing ring 32 also has an outer engaging portion 322 and a groove 323. The outer engaging portion 322 is formed on the outer ring side of the fixing ring 32, and in this embodiment, the outer engaging portion 322 is an annular flange. The groove 323 is formed through the side wall of the fixing ring 32 and forms a notch at the periphery of the fixing outlet 3212, thereby increasing the function of the fixing outlet 3212 being elastically opened, making it easier for the back spray hose 34 to be inserted from the fixing inlet 3211 to the fixing outlet 3212.

[0032] Please refer to Figures 3 to 5. The back spray seat 313 has a slanted end 3131, an inlet end 3132, a back spray liquid channel 3133, an inner engaging part 3135, and a stopping annular surface 3136.

[0033] Please refer to Figures 5 to 7. Specifically, the backspray seat 313 has two opposing ends, the lower end being the angled connection end 3131 and the upper end being the access end 3132. The angled connection end 3131 is connected to the switching seat 312 and tilts the backspray seat 3133. At the same time, the angled connection end 3131 also moves the access end 3132 away from the switching seat 312 and forms an angle with the switching seat 312. As shown in Figure 7, there is an angle θ1 between the central axis of the backspray seat 313 and the central axis of the switching seat 312. This angle θ1 is between 20 degrees and 60 degrees, thereby tilting the backspray seat 313 relative to the switching seat 312, but it is not limited to this angle.

[0034] Please refer to Figures 4 and 5. Furthermore, the stagnant annular surface 3136 is formed around the internal space of the back spray seat 313, and the back spray liquid channel 3133 is formed in the internal space of the back spray seat 313. The back spray liquid channel 3133 is connected to the back spray connection port 3122 and is further connected to the common channel 3111 through the back spray connection port 3122.

[0035] Please refer to Figures 4 and 5. Specifically, in this embodiment, the internal space of the back spray seat 313 forms an inner ring side corresponding to the outer ring side of the fixing ring 32. The inner engaging part 3135 is formed on the inner ring side of the back spray seat 313, and the inner engaging part 3135 is specifically a ring groove.

[0036] Next, please refer to Figures 4 and 5. The two opposite ends of the backspray hose 34 are a front end 341 and an end end 342, and the opening at the front end 341 is the backspray suction port 343. The end end 342 of the backspray hose 34 passes through the fixing ring 32 and extends to the stagnant ring surface 3136 of the backspray seat 313. In this embodiment, the fixing ring 32 can be elastically opened because it has a notch in the groove 323. When the backspray hose 34 is not passed through the fixing ring 32, the inner diameter of the fixing outlet 3212 is smaller than the outer diameter of the backspray hose 34. Therefore, when the end end 342 of the backspray hose 34 passes through the fixing hole 321 and protrudes from one side of the fixing outlet 3212, the fixing outlet 3212 will surround and restrict the sliding of the backspray hose 34. In this way, the backspray hose 34 is clamped and positioned in the fixing hole 321 of the fixing ring 32.

[0037] Please refer to Figures 3 to 7. A retaining ring 32 and a back spray hose 34 are disposed on the back spray base 313. Preferably, when the retaining ring 32 and the back spray hose 34 are to be inserted into the back spray base 313 at the same time, the length of the back spray hose 34 can be set in advance and the retaining ring 32 and the back spray hose 34 can be combined into a combined unit 350 as shown in Figure 5.

[0038] Please refer to Figures 4 to 6. After the assembly unit 350 is completed, the retaining ring 32 on the protruding side of the end 342 of the back spray hose 34 of the assembly unit 350 is pushed toward the internal space of the back spray base 313, so that the outer engaging portion 322 (ring flange) of the retaining ring 32 is securely embedded in the inner engaging portion 3135 (ring groove) of the back spray base 313. The end 342 of the back spray hose 34 extends to the stagnant ring surface 3136, so that the end 342 of the back spray hose 34 communicates with the back spray liquid channel 3133, thereby fixing the retaining ring 32 and the back spray hose 34 in the back spray base 313.

[0039] In this embodiment, specifically, the backspray hose 34 can be made of a thin tube of low-density polyethylene (LDPE) made of a soft and flexible material. Furthermore, in this embodiment, the inner diameter of the backspray hose 34 is between 1.40 and 1.50 mm, and the outer diameter is between 2.00 and 2.10 mm. However, the specifications of the backspray hose 34 are not limited to these, and the material of the backspray hose 34 is not limited to soft materials such as polyethylene, as long as the backspray hose 34 exhibits the characteristics of being flexible and able to return to its original shape. As shown in Figures 3, 4, and 11, the length of the backspray hose 34 used in the first embodiment, from the top end 324 of the fixing ring 32 of the backspray seat 313 to the front end 341 of the backspray suction port 343, is approximately 8.5 mm.

[0040] Please refer to Figures 2, 3 and 7. The top end of the positive spray suction pipe 40 is connected to the inner hole of the positive spray connecting pipe 36 at the bottom of the body 31. The top end of the positive spray suction pipe 40 is connected to the common channel 3111 and the liquid inlet 221 of the aerosol valve 20 through the positive spray connecting port 3112. The bending direction of the tail end of the slightly curved positive spray suction pipe 40 is usually fixed to the same side as the nozzle port 51 of the spray head 50 at the top of the tank 10. The positive spray suction port 401 at the tail end of the positive spray suction pipe 40 is close to the corner where the tank body and the bottom of the tank are connected. Therefore, the positive spray suction port 401 can be immersed and positioned in the liquid P in the bottom of the tank.

[0041] Please refer to Figures 3 and 7. In the first embodiment, when the tank 10 is used in the forward spray state, the bead 33 slides down under the action of gravity and blocks the back spray connection port 3122, thereby blocking the connection between the back spray suction port 343 and the common channel 3111; so that the forward spray suction port 401 of the forward spray suction pipe 40 is immersed in the liquid agent P, and the liquid agent P is drawn in and sprayed out through the forward spray connection port 3112, the common channel 3111 and the liquid agent inlet 221 and then through the liquid agent outlet 222.

[0042] Please refer to Figures 3, 8, and 9. In the first embodiment, when the can 10 is held in a reverse spray state or in a tilted reverse spray state, especially when the liquid P in the can 10 is only half or less, the liquid P will flow to and accumulate at the bottom 211 of the fixed cover 21 of the aerosol valve 20 and the corner of the inner wall surface 12 of the can 10. At this time, the bead 33 slides down onto the stop part 3123 under the action of gravity, thereby opening the reverse spray connection port 3122, so that the reverse spray suction port 343 immersed in the liquid P can draw in the liquid P and spray it out through the reverse spray liquid channel 3133, the reverse spray connection port 3122, the common channel 3111, and the liquid inlet 221, and then spray the liquid P out through the liquid outlet 222.

[0043] Please refer to Figures 11 to 13. In the first embodiment, when the aerosol valve 20 is to be sealed and fixed on the mounting opening 11 of the can 10, even though the width W1 of the body 31 is smaller than the inner diameter D1 of the mounting opening 11 of the can 10, the front end 341 of the back spray hose 34 inserted on the back spray seat 313 may still touch the periphery of the mounting opening 11 of the can 10 and bend slightly. Then, by continuing to move the aerosol valve 20 towards the bottom of the can, the aerosol valve 20 can be sealed and fixed on the mounting opening 11 of the can 10, and the front spray suction port 401 of the front spray suction pipe 40 connected to the body 31 is also inserted into the bottom periphery of the can 10.

[0044] Next, please refer to Figures 14 and 15. In the second embodiment of this invention, the back spray mechanism 30A is largely the same as that in the first embodiment, but the main difference is that in the second embodiment, the switching seat 312A of the main body 31A is arranged in a different direction relative to the common channel seat 311A, and the second embodiment has two back spray seats 313B and 313C. The specific structure of the switching seat 312A and the common channel seat 311A ​​is largely the same as that in the first embodiment, so it will not be described in detail here.

[0045] Please refer to Figures 15 and 17. In the second embodiment, the two oblique ends 3131B and 3131C of the two back spray seats 313B and 313C are connected to the switching seat 312A. The two oblique ends 3131B and 3131C tilt the two back spray seats 313B and 313C. At the same time, the two oblique ends 3131B and 3131C also cause the two access ends 3132B and 3132C to move away from the switching seat 312A and to be inclined at an angle to the switching seat 312A. Specifically, the two back spray seats 313B and 313C are obliquely connected to the opposite ends of the switching seat 312A in the radial direction and extend away from each other. In this embodiment, the central axes of the two backspray seats 313B and 313C are respectively at angles θ2 and θ3 with the central axis of the switching seat 312A. The angles θ2 and θ3 are both between 20 degrees and 60 degrees, but are not limited thereto. The internal spaces of the two backspray seats 313B and 313C each form backspray liquid channels 3133B and 3133C and stagnant annular surfaces 3136B and 3136C. The backspray liquid channels 3133B and 3133C are connected to the backspray connecting port 3122A and further connected to the common channel 3111A of the common channel seat 311A. The stagnant annular surfaces 3136B and 3136C are formed around the internal spaces of the two backspray seats 313B and 313C.

[0046] Please refer to Figures 15 and 16. Similar to the first embodiment, in the second embodiment, a recessed plane 2251A is provided on one side of the extension tube 225A of the valve seat 22A, and the inner ring side of the common channel 3111A has a protruding plane 3115A corresponding to the outline of the recessed plane 2251A of the extension tube 225A. The outer diameter of the extension tube 225A in this invention is a hollow cone that gradually narrows from top to bottom, and the inner diameter of the annular wall of the common channel 3111A is also a cone that gradually narrows from top to bottom. Therefore, the outer diameter of the extension tube 225A is smaller than the inner diameter of the top opening 3114A of the common channel 3111A. When the extension tube 225A of valve seat 22A is inserted into the common channel 3111A, the two cones rub against each other and interfere. At this time, the bottom 224A of valve seat 22A also moves downward and tightly engages with the top 3113A of common channel 3111A. Thus, the concave plane 2251A and the convex plane 3115A fit tightly together, so valve seat 22A will not rotate arbitrarily and will not cause leakage of liquid P in tank 10. In this invention, the concave plane 2251A of extension tube 225A and the protruding protrusion 223A of valve seat 22A are parallel and face away from each other in opposite directions. Therefore, after extension tube 225A is inserted into common channel 3111A, the protrusion 223A of valve seat 22A is also fixedly located at the top opening 3124A of switching seat 312A to prevent bead 33 from falling out of bead channel 3121A.

[0047] Please refer to Figures 18 and 19. In the second embodiment, when the tank 10 is used in the forward spray state, the bead 33A slides down under the action of gravity and blocks the back spray connection port 3122A, thereby blocking the connection between the back spray suction ports 343B and 343C and the common channel 3111A; so that the forward spray suction port 401 of the forward spray suction pipe 40 is immersed in the liquid agent P, and the liquid agent P is drawn in and sprayed out through the forward spray connection port 3112A, the common channel 3111A and the liquid agent inlet 221 and then through the liquid agent outlet 222.

[0048] Please refer to Figures 20 and 23. In the second embodiment, when the can 10 held in the hand is used in a reverse spray state or in a tilted reverse spray state, especially when the liquid P in the can 10 is only half or less, the liquid P will flow to and accumulate at the corner of the bottom 211 of the fixed cover 21 of the aerosol valve 20 and the inner wall surface 12 of the can 10. At this time, the bead 33A slides down onto the stop part 3123A under the action of gravity, thereby opening the reverse spray connection port 3122A, so that the reverse spray suction ports 343B and 343C immersed in the liquid P can draw in the liquid P and spray it through the reverse spray liquid channel 3133B, the reverse spray liquid channel 3133C, the reverse spray connection port 3122A, the common channel 3111A, and the liquid inlet 221, and then spray the liquid P out through the liquid outlet 222.

[0049] Please refer to Figures 24 to 26. In the second embodiment, when the aerosol valve 20 is to be sealed and fixed on the mounting opening 11 of the can 10, even though the width W2 of the body 31A is smaller than the inner diameter of the mounting opening 11 of the can 10, the front ends 341B and 341C of the two back spray hoses 34B and 34C provided on the back spray seats 313B and 313C are slightly bent due to contact with the mounting opening 11 of the can 10. Then, by continuing to move the aerosol valve 20 towards the bottom of the can, the aerosol valve 20 can be sealed and fixed on the mounting opening 11 of the can 10, and the forward spray suction port 401 of the forward spray suction pipe 40 connected to the body 31A is also inserted into the bottom periphery of the can 10.

[0050] After the aforementioned installation, the two slightly bent back spray hoses 34B and 34C will return to their original state, and the front ends 341B and 341C of the back spray suction ports 343B and 343C respectively face the bottom 211 of the fixed cover 21 and the corner of the inner wall 12 of the tank 10, and respectively face opposite directions in the radial direction of the tank 10, that is, they face the same direction as the nozzle 51 of the spray head 50, and also face away from the nozzle 51 of the spray head 50. In addition, please refer to Figure 24. Similarly, the lengths of the two backspray hoses 34B and 34C are approximately 9.1 mm from the tops 324B and 324C of the fixing rings 32B and 32C of the backspray seats 313B and 313C to the front ends 341B and 341C of the two backspray water inlets 343B and 343C. However, this is not a limitation, and the lengths of the two backspray hoses 34B and 34C can be increased as needed.

[0051] Please refer to Figures 11 to 13 and Figures 24 to 26. Furthermore, since this invention uses a backflow hose 34, the length of the backflow hose 34 protruding from the top 324 of the fixing ring 32 can be adjusted according to the inner diameter specifications of different tanks 10. Because the elastic backflow hose 34 can immediately return to its original shape even after being bent, its liquid absorption function will not be affected.

[0052] Please refer to Figures 27 to 30. The aerosol valve 20 and the canister 10 described in this invention are a matching combination. Both are 1 inch (25.4 mm) in diameter, which is the international standard specification. Both use compressed gas or high-pressure gas as the propellant for the high-pressure spray can. Among them, the large-capacity canister 10 has eight outer diameter specifications widely used in the international market, namely 35 mm, 38 mm, 40 mm, 45 mm, 50 mm, 53 mm, 59 mm and 65 mm. The inner diameter of the mounting opening 11 of the outer diameter specifications of the above-mentioned canister 10 is also 1 inch (25.4 mm) in diameter, which is the international standard. The matching aerosol valve 20 is also 1 inch (25.4 mm) in diameter, which is the international standard. Because this invention has the advantages of tilting spray seats 313, 313B, 313C and spray hoses 34, 34B, 34C, they can all be used with the above-mentioned eight types of canister 10. Especially when the liquid agent P in the canister 10 is only half or less, and the canister 10 is used in a reverse spray state or in a reverse spray state at any tilt, the reverse spray nozzles 343, 343B, and 343C of this invention can all draw in and spray the liquid agent P in the canister 10 without leaving any liquid agent and causing waste.

[0053] Please refer to Figures 14 to 17. Generally speaking, the structure and function of the second embodiment of this invention are largely the same as those of the first embodiment, but the differences are as follows:

[0054] First, if we look directly at Figures 2 and 7 of this invention, the switching seat 312 and the common channel seat 311 of the first embodiment are arranged side by side, and the common channel seat 311 is located to the right of the switching seat 312; if we look directly at Figures 14 and 15 of this invention, the switching seat 312A and the common channel seat 311A ​​of the second embodiment are arranged side by side, and the common channel seat 311A ​​is located behind the switching seat 312A.

[0055] Second, the number of back spray seats 313 in the first embodiment is one, while the number of back spray seats 313B and 313C in the second embodiment is two.

[0056] Third, continuing from the above, in the first embodiment, there is one back spray hose 34, and its back spray suction port 343 faces the bottom 211 of the fixed cover 21 and one corner of the inner wall 12 of the tank 10, that is, in the same direction as the nozzle 51 of the spray head 50; while in the second embodiment, there are two back spray hoses 34B and 34C, and the back spray suction ports 343B and 343C of the two back spray hoses 34B and 34C face the bottom 211 of the fixed cover 21 of the aerosol valve 20 and the two opposite corners of the inner wall 12 of the tank 10, that is, in the same direction as the nozzle 51 of the spray head 50 and in the opposite direction to the nozzle 51 of the spray head 50, respectively.

[0057] Please refer to Figures 22 and 23. In the second embodiment of this invention, especially when the liquid P in the can 10 is only half or less, when the can 10 of the second embodiment is used in a reverse spraying state and tilted to the left or right, the liquid P accumulates at the bottom 211 of the fixed cover 21 and the two opposite corners of the inner wall 12 of the can 10. Since the second embodiment has two reverse spraying seats 313B and 313C extending in opposite directions, the reverse spraying hoses 34B and 34C provided on the two reverse spraying seats 313B and 313C can be immersed in the liquid P in the two tilting states respectively, and the liquid P can be sprayed out smoothly.

[0058] In summary, the advantage of this invention is that, by using the inclined back spray seats 313, 313B, and 313C to be obliquely connected to the switching seats 312 and 312A, and the back spray hoses 34, 34B, and 34C, and because the central axis of the back spray seats 313, 313B, and 313C has an included angle θ1, θ2, and θ3 with the central axis of the switching seats 312 and 312A, the back spray suction ports 343, 343B, and 343C of the back spray hoses 34, 34B, and 34C can be close to the bottom 211 of the fixing cover 21 of the aerosol valve 20 and the corner of the inner wall 12 of the tank body 10. Therefore, when the can 10 is used in the reverse spray state or in any tilted reverse spray state, especially when the liquid agent P in the can 10 is only half or less, the liquid agent P can flow to and converge at the corner of the bottom 211 of the fixed cover 21 of the aerosol valve 20 and the inner wall surface 12 of the can 10. Thus, the reverse spray suction ports 343, 343B, and 343C can smoothly draw up the liquid agent P and spray the liquid agent P in the can 10 through the aerosol valve 20 and the nozzle 50. Furthermore, since this invention uses flexible hoses as backspray hoses 34, 34B, and 34C, which are made of soft, flexible, low-density polyethylene (LDPE) tubing, and whose inner diameter is between 1.40 and 1.50 mm and outer diameter is between 2.00 and 2.10 mm, the backspray hoses 34, 34B, and 34C exhibit better flexibility and resilience. Specifically, the main bodies 31 and 31A of this invention, combined with the aerosol valve 20, ensure that even when the liquid P in the canister 10 is only half full or less, regardless of whether the canister 10 is used in a forward spraying, reverse spraying, or reverse spraying at any tilt, the reverse spray suction ports 343, 343B, and 343C of the reverse spray hoses 34, 34B, and 34C can be immersed in and absorb the liquid P, thus smoothly spraying out the liquid P. In short, this invention can almost completely spray out the liquid P in the canister 10, avoiding waste caused by excessive liquid P remaining in the canister 10. This advantage is not found in existing reverse spraying devices for liquid containers.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the scope of the present invention. [Simplified Explanation of the Diagram]

[0060] Figure 1 is a perspective view of the liquid container of this invention, wherein the container body is transparent and the back spray mechanism is a first embodiment. Figure 2 is a perspective exploded view of the liquid container of this invention, wherein the back spray mechanism is a first embodiment. Figure 3 is an enlarged cross-sectional view of the first embodiment of the back spray mechanism of this invention disposed in the container body. Figure 4 is an exploded view of the back spray hose connected to the back spray seat in the first embodiment of the back spray mechanism of this invention. Figure 5 is a cross-sectional view of the back spray hose disposed in the back spray seat in the first embodiment of the back spray mechanism of this invention. Figure 6 is a perspective view of the fixing ring of this invention. Figure 7 is a schematic diagram of the first embodiment of the back spray mechanism of this invention in the forward spray state. Figure 8 is a schematic diagram of the first embodiment of the back spray mechanism of this invention in the back spray state. Figure 9 is a schematic diagram of the first embodiment of the back spray mechanism of this invention in the back spray state at any tilt. Figure 10 is a perspective exploded view of the valve seat and the first embodiment of the back spray mechanism of this invention, showing the directionality of the valve seat relative to the back spray mechanism. Figure 11 is a cross-sectional view of the first embodiment of the back spray mechanism of this invention connected to the aerosol valve, showing the distance from the front end of the back spray hose to the top of the ring. Figures 12 and 13 are flow diagrams of the first embodiment of the back spray mechanism of this invention installed in the can. Figure 14 is a perspective view of the second embodiment of the back spray mechanism of this invention installed in a can, with the can shown transparently. Figure 15 is a perspective view of the second embodiment of the back spray mechanism of this invention, with the bead shown separately. Figure 16 is an exploded perspective view of the valve seat and the second embodiment of the back spray mechanism of this invention, showing the directionality of the valve seat relative to the back spray mechanism. Figure 17 is a partially enlarged cross-sectional view of the second embodiment of the back spray mechanism of this invention installed in the can. Figures 18 and 19 are schematic diagrams of the second embodiment of the back spray mechanism of this invention in the forward spray state. Figures 20 and 21 are schematic diagrams of the second embodiment of the back spray mechanism of this invention in the back spray state. Figure 22 is a schematic diagram of the second embodiment of the back spray mechanism of this invention in an arbitrary tilted back spray state. Figure 23 is a schematic diagram of the second embodiment of the back spray mechanism of this invention when it is sprayed at another angle and in an arbitrary tilted state. Figure 24 is a cross-sectional schematic diagram of the back spray mechanism of the second embodiment of this invention connected to the aerosol valve, which shows the distance from the front end of each back spray hose to the top of each ring. Figures 25 and 26 are flow diagrams of the second embodiment of the back spray mechanism of this invention installed in the tank. Figures 27 and 28 are schematic diagrams of the first embodiment of the back spray mechanism of this invention installed in tanks of different outer diameters. Figures 29 and 30 are schematic diagrams of the second embodiment of the back spray mechanism of this invention installed in tanks of different outer diameters. Figure 31 is a schematic diagram of the conventional technology in the forward spray state. Figure 32 is a schematic diagram of the conventional technology in the back spray state. Figure 33 is a schematic diagram of the conventional technology in the back spray state but unable to spray liquid. Figure 34 is a schematic diagram of the conventional technology in the back spray state in an arbitrary tilted state but unable to spray liquid.

Claims

1. A backspray mechanism for being disposed within a canister and for connecting to an aerosol valve; the backspray mechanism comprising: a body having: a common channel seat including: a common channel formed inside the common channel seat and communicating with the aerosol valve; a forward spray port communicating with the common channel; a switching seat disposed side-by-side with the common channel seat, the switching seat including: a bead channel formed inside the switching seat and communicating with the aerosol valve; and a backspray port formed at the bottom end of the switching seat, the backspray port communicating with the bead channel and the common channel; a stop portion disposed at the top opening of the switching seat; a bead movably disposed within the bead channel and selectively communicating with or blocking the backspray port; and at least one backspray seat including: a bevel end connected to the switching seat; An access end, which is located away from the switching seat and inclined at an angle to the switching seat; a back spray liquid channel formed inside the at least one back spray seat, the back spray liquid channel communicating with the back spray connection port; an inner engaging portion formed inside the inner ring side of the back spray seat; and a stabilizing ring surface formed around the inside of the back spray seat; at least one fixing ring disposed on the at least one back spray seat, the at least one fixing ring having: a fixing hole formed through the at least one fixing ring, the fixing hole having a fixing inlet and a fixing outlet at its two ends respectively; and an outer engaging portion formed on the outer ring side of the at least one fixing ring. A groove is formed through the side wall of the at least one fixed ring and located at the periphery of the fixed outlet; and at least one back spray hose is disposed on the back spray seat of the body, the end of the at least one back spray hose passes through the at least one fixed ring and protrudes from the fixed outlet, and the end of the at least one back spray hose is connected to the back spray communication port, and the front end of the at least one back spray hose forms a back spray suction port.

2. The back spray mechanism as described in claim 1, wherein: The at least one backspray hose is a flexible, bendable, low-density polyethylene (LDPE) tube, and the inner diameter of the at least one backspray hose is between 1.40 and 1.50 mm, while the outer diameter of the at least one backspray hose is between 2.00 and 2.10 mm.

3. The back spray mechanism as described in claim 1 or 2, wherein: The inner diameter of the fixing hole of the at least one fixing ring gradually decreases from the fixing inlet to the fixing outlet; wherein, when the at least one back spray hose is not inserted through the at least one fixing ring, the inner diameter of the fixing outlet is smaller than the outer diameter of the at least one back spray hose.

4. The back spray mechanism as described in claim 3, wherein: The outer engaging portion of the at least one fixing ring is an annular flange; the inner engaging portion of the back spray seat is an annular groove, thereby enabling the outer engaging portion of the at least one fixing ring to engage with the inner engaging portion of the at least one back spray seat.

5. The back spray mechanism as described in claim 1 or 2, wherein: The number of at least one back spray seat is two, the number of at least one fixing ring is two, and the number of at least one back spray hose is two, the back spray hoses are respectively inserted through the fixing rings, and the fixing rings are respectively disposed inside the back spray seat.

6. A liquid container comprising: a canister body, which is hollow and has an installation opening; an aerosol valve, which is sealed and fixed to the installation opening of the canister body, the aerosol valve having a liquid inlet and a liquid outlet, the liquid inlet being located in the internal space of the canister body, and the liquid outlet being located outside the canister body; the liquid inlet communicating with the liquid outlet; a valve seat disposed at the bottom of a fixed cover of the aerosol valve, the valve seat having a protrusion and an extension tube, the protrusion being formed on the outer peripheral surface of the valve seat, the extension tube being formed at the bottom of the valve seat, and the liquid inlet being located at the bottom end of the extension tube; a back spray mechanism connected to the aerosol valve, the back spray mechanism comprising: a body, the body having: a common channel seat, comprising: a common channel formed inside the common channel seat and communicating with the liquid inlet of the aerosol valve; and a forward spray port communicating with the common channel; A switching seat, arranged side-by-side with a common channel seat, the switching seat comprising: a bead channel formed inside the switching seat and connected to the common channel and the liquid inlet of the aerosol valve; a backspray port formed at the bottom end of the switching seat and connected to the bead channel and the common channel; a stop portion disposed at the top opening of the switching seat; and a bead movably disposed within the bead channel and selectively connecting or blocking the backspray port; and at least one backspray seat comprising: a bevel end connected to the switching seat; an inlet end inclined away from the switching seat and at an angle to the switching seat; a backspray liquid channel formed inside the at least one backspray seat and connected to the backspray port; an inner engaging portion formed on the inner annular side of the backspray seat; and a stopping annular surface formed around the backspray seat. At least one fixing ring is disposed on the at least one back spray seat. The at least one fixing ring has: a fixing hole formed through the at least one fixing ring, with a fixing inlet and a fixing outlet at each end of the fixing hole; an outer engaging portion formed on the outer ring side of the at least one fixing ring; a groove formed through the side wall of the at least one fixing ring and located at the periphery of the fixing outlet; and at least one back spray hose disposed on the back spray seat of the body. The end of the at least one back spray hose passes through the at least one fixing ring and protrudes outward from the fixing outlet. The at least one back spray hose is interconnected with the back spray communication port, and the front end of the at least one back spray hose forms a back spray suction port; and a forward spray suction pipe disposed in the inner hole of a forward spray connecting pipe of the body and connected to the aerosol valve.

7. The liquid container as described in claim 6, wherein: The valve seat has a protrusion formed on the outer peripheral surface of the valve seat. The protrusion is located at the top opening of the switching seat, thereby preventing the ball from disengaging from the ball channel through the top opening.

8. A liquid container as described in claim 6 or 7, wherein, The at least one backspray hose is a flexible, bendable, low-density polyethylene (LDPE) tube, and the inner diameter of the at least one backspray hose is between 1.40 and 1.50 mm, while the outer diameter of the at least one backspray hose is between 2.00 and 2.10 mm.

9. A liquid container as described in claim 6 or 7, wherein: The extension tube of the valve seat has a recessed plane, and the inner ring side of the common channel seat has a raised plane corresponding to the outline of the recessed plane of the extension tube; the outer diameter of the extension tube gradually decreases from top to bottom, and the inner diameter of the common channel gradually decreases from top to bottom. When the bottom of the valve seat is engaged with the top of the common channel seat, the recessed plane and the raised plane fit tightly together.

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