An inverted all-plastic pistol pump

Abstract

This invention discloses an inverted all-plastic pistol pump, comprising a pump body with a housing fitted onto it. The pump body contains interconnected spray and pressure channels. A liquid inlet chamber is located within the pump body, and a piston is installed within the liquid inlet chamber. The pump body also has a valve chamber connected to the liquid inlet chamber and the pressure channels. An elastic valve core is located within the valve chamber, comprising an upper elastic tube and a lower elastic tube. A valve core check plate is movably positioned between the upper and lower elastic tubes. A backflow device is inserted into the side of the elastic valve core facing the liquid container, enabling the pistol pump to spray forward and backward. Because this invention integrates the forward and inverted liquid inlet channels into a single backflow device, it can achieve liquid spraying from the liquid container in both the forward and inverted states of the pistol pump, while simplifying the internal structure and effectively solving the problems of complex structure, difficult manufacturing and assembly, and high cost associated with inverted pistol pumps.

Description

Technical Field

[0001] This invention relates to the field of pistol pump technology, and in particular to an inverted all-plastic pistol pump. Background Technology

[0002] A pistol pump is a spray pump fixed to a container. In use, pulling the trigger draws liquid from a bottle into the pump body within a predetermined number of cycles and sprays it out in a predetermined pattern. It is widely used in the pharmaceutical and cosmetic industries. Currently, pistol pumps typically only spray liquid when the container is held upright and the trigger is pressed. If the container is held upside down, the liquid cannot be sprayed even when the trigger is pressed.

[0003] To achieve spraying in both upright and inverted states of the pistol pump, existing upright-inverted pistol pumps typically place two different inlet channels—one upright and one inverted—in separate spray components. This allows for the spraying of liquid from the container in both upright and inverted states. Such upright-inverted pistol pumps are complex in structure, difficult to manufacture and assemble, and costly.

[0004] This invention was made based on this situation. Summary of the Invention

[0005] Therefore, one of the objectives of this invention is to provide a simple, easy-to-assemble, cost-effective, and inverted all-plastic pistol pump that can spray liquid from a container in both upright and inverted states.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows:

[0007] An inverted all-plastic pistol pump includes a pump body with a housing fitted onto it. The pump body contains an interconnected spray channel and a pressure channel. The pump body has a liquid inlet chamber containing a piston. The pump body also has a valve chamber connected to the liquid inlet chamber and the pressure channel. The valve chamber contains a resilient valve core, which includes an upper resilient tube and a lower resilient tube. A valve core check valve is movably positioned between the upper and lower resilient tubes. A backflow device is inserted into the side of the resilient valve core facing the liquid container to enable forward and reverse spraying of the pistol pump. The pump body also has a trigger assembly hinged to it to drive the piston. The pump body also has an air inlet for allowing external air to enter the liquid container.

[0008] Preferably, the back spray device includes a universal valve seat that engages with the elastic valve core, and a universal valve base. The bottom side of the universal valve base is provided with a positive liquid inlet channel, and the universal valve base is also provided with a liquid inlet hole communicating with the positive liquid inlet channel. The side of the universal valve seat is provided with an inverted liquid inlet channel and a one-way back spray valve. The one-way back spray valve is used to control the opening and closing between the inverted liquid inlet channel and the liquid inlet hole. The universal valve seat is also provided with a liquid inlet chamber communicating with the lower elastic tube cavity and the liquid inlet hole. Liquid in the liquid container can enter the liquid inlet chamber from the positive liquid inlet channel through the liquid inlet hole, and liquid in the liquid inlet chamber can enter the upper elastic tube cavity through the lower elastic tube cavity via the valve core check plate.

[0009] Preferably, the one-way backflow valve includes a pump ball movably disposed inside the universal valve seat; when the pistol pump is in the upright position, the pump ball blocks the communication between the inverted liquid inlet channel and the liquid inlet hole, and the liquid in the liquid container can only enter the liquid inlet chamber through the inlet hole via the upright liquid inlet channel; when the pistol pump is in the inverted position, the inverted liquid inlet channel is connected to the liquid inlet hole, and the liquid in the liquid container can enter the liquid inlet chamber through the inverted liquid inlet channel and the liquid inlet hole.

[0010] Preferably, the valve cavity is formed from the inside out into a valve core insertion cavity, a valve seat sealing snap-fit ​​inner cavity, and a valve seat sealing snap-fit ​​outer cavity. The valve core insertion cavity is connected to the liquid inlet cavity, and the valve seat sealing snap-fit ​​outer cavity is connected to the air inlet. The back spray device is provided with an inner insertion ring wall and an outer insertion ring wall, which are respectively inserted into the valve seat sealing snap-fit ​​inner cavity and the valve seat sealing snap-fit ​​outer cavity.

[0011] Preferably, the outer wall of the upper elastic tube is elastically and sealingly connected to the inner wall of the valve core insertion cavity, and the elastic valve core is disposed inside the cavity formed by the inner insertion ring wall of the back spray device and can move up and down elastically.

[0012] Preferably, the back spray device is provided with an air exchange port that communicates with the outer cavity of the valve seat sealing snap-fit, and the air inlet, the outer cavity of the valve seat sealing snap-fit, and the air exchange port together form a gas channel.

[0013] Preferably, a one-way valve is provided around the sealing sleeve of the back spray device on one side where the air exchange port is opened, and the valve cavity formed by the one-way valve is connected to the gas channel.

[0014] Preferably, the trigger assembly includes a trigger handle, the trigger handle has a pair of connecting holes, the piston has a connecting post that can be inserted into the pair of connecting holes, the upper end of the trigger handle is connected to a pair of reset arc rods that can drive the trigger handle to reset, and the pump body has a pair of fixing posts that fix the pair of reset arc rods.

[0015] Preferably, the lower end of the pump body is connected to a locking cap for connecting to a liquid container, and a sealing ring is provided between the locking cap and the pump body.

[0016] Preferably, the pump body is connected to a nozzle, the nozzle is connected to the liquid spraying channel, and the front end of the nozzle is provided with a detachable nozzle head.

[0017] Preferably, the pistol pump is made entirely of plastic material.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: Since the present invention integrates the upright liquid inlet channel and the inverted liquid inlet channel into a single spray device, it can achieve liquid spraying inside the liquid container in both the upright and inverted states of the pistol pump, while simplifying the internal structure and effectively solving the problems of complex structure, difficult manufacturing and assembly, and high cost of upright and inverted pistol pumps; In addition, since all the components of the present invention are made of plastic, the pistol pump can be recycled without disassembly and separation, reducing the difficulty and cost of recycling, and is environmentally friendly and energy-saving. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall structure of another embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional view of another embodiment of the present invention;

[0023] Figure 5 This is an exploded view of the present invention;

[0024] Figure 6 This is a schematic diagram of the pump body in this invention;

[0025] Figure 7 yes Figure 2 BB direction cross section view;

[0026] Figure 8 This is a schematic diagram of the connection between the elastic valve core, the valve core check plate, and the backflow device of the present invention when the pistol pump is in the upright position.

[0027] Figure 9 for Figure 8 Cross-sectional view in the CC direction;

[0028] Figure 10 This is a schematic diagram of the connection between the elastic valve core, the valve core check plate, and the backflow device when the pistol pump is inverted.

[0029] Figure 11 for Figure 10 Cross-sectional view in the DD direction;

[0030] Figure 12 This is a cross-sectional view of the present invention with the pistol pump inverted;

[0031] Figure 13 This is a schematic diagram of a structure of the present invention where the pistol pump is in the upright position and sprays a mist.

[0032] Figure 14 This is a schematic diagram of a structure of the present invention where the pistol pump sprays mist when inverted;

[0033] Figure 15 for Figure 14 Cross-sectional view in the EE direction. Detailed Implementation

[0034] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0035] Reference Figures 1 to 4 This invention proposes an inverted all-plastic pistol pump, comprising a pump body 1, a housing 2 fitted onto the pump body 1, a liquid spraying channel 11 and a liquid pressurizing channel 12 connected inside the pump body 1, a liquid inlet chamber 11 inside the pump body 1, a piston 14 inside the liquid inlet chamber 11, a valve chamber 15 connected to the liquid inlet chamber 11 and the liquid pressurizing channel 12, an elastic valve core 16 inside the valve chamber 15, the elastic valve core 16 comprising an upper elastic tube 161 and a lower elastic tube 162, a valve core check plate 163 movably disposed between the upper elastic tube 161 and the lower elastic tube 162, a back spraying device 3 for realizing the forward and reverse spraying functions of the pistol pump being inserted into the side of the elastic valve core 16 facing the liquid container, a trigger assembly 4 hinged to the pump body 1 to drive the piston 14 to move, and an air inlet 17 for allowing external air to enter the liquid container.

[0036] like Figures 7 to 11 As shown, the back spray device 3 includes a universal valve seat 31 that engages with the elastic valve core 16, and a universal valve base 33. The bottom side of the universal valve base 33 is provided with a positive liquid inlet channel 331, and the universal valve base 33 is also provided with a liquid inlet hole 34 that communicates with the positive liquid inlet channel 331. The side of the universal valve seat 31 is provided with an inverted liquid inlet channel 36 and a one-way back spray valve. The one-way back spray valve is used to control the opening and closing between the inverted liquid inlet channel 36 and the liquid inlet hole 34. The universal valve seat 31 is also provided with a liquid inlet chamber 35 that communicates with the inner cavity of the lower elastic tube 162 and the liquid inlet hole 34. The liquid in the liquid container can enter the liquid inlet chamber 35 through the positive liquid inlet channel 331 and the liquid inlet hole 34. The liquid in the liquid inlet chamber 35 can enter the inner cavity of the upper elastic tube 161 through the inner cavity of the lower elastic tube 162 and the valve core check plate 163.

[0037] The one-way backflow valve includes a pump ball 32 movably disposed inside the universal valve seat 31. When the pistol pump is in the upright position, the pump ball 32 blocks the upper port of the universal valve seat 31 under the action of gravity, blocking the connection between the inverted liquid inlet channel 36 and the liquid inlet hole 34. The liquid in the liquid container can only enter the liquid inlet chamber 35 through the inlet hole 34 via the upright liquid inlet channel 331. When the pistol pump is in the inverted position, the pump ball 32 leaves the upper port of the universal valve seat 31 under the action of gravity. The inverted liquid inlet channel 36 is connected to the liquid inlet hole 34. The liquid in the liquid container can enter the liquid inlet chamber 35 through the inverted liquid inlet channel 36 and the liquid inlet hole 34.

[0038] like Figure 2 , Figure 4 and Figure 6 As shown, the valve chamber 15 is formed from the inside out into a valve core insertion cavity 151, a valve seat sealing snap-fit ​​inner cavity 152, and a valve seat sealing snap-fit ​​outer cavity 153. The valve core insertion cavity 151 communicates with the liquid inlet cavity 11, and the valve seat sealing snap-fit ​​outer cavity 153 communicates with the air inlet 17. The back spray device 3 is provided with an inner insertion ring wall 37 and an outer insertion ring wall 38, which are respectively inserted into the valve seat sealing snap-fit ​​inner cavity 152 and the valve seat sealing snap-fit ​​outer cavity 153. The back spray device 3 and the valve chamber 15 form a mutually snap-fit ​​sealing structure, which facilitates installation and ensures the sealing performance after snap-fit.

[0039] like Figure 2 and Figure 4 As shown, the outer wall of the upper elastic tube 161 is elastically sealed to the inner wall of the valve core insertion cavity 151. The elastic valve core 16 is located inside the cavity formed by the inner insertion ring wall 37 of the back spray device 3 and can move up and down elastically. The space formed by the inner wall of the valve core insertion cavity 151 and the outer wall of the upper elastic tube 161 in the valve cavity 15 is the liquid outlet space A.

[0040] like Figure 2 , Figure 4 and Figure 7 As shown, the back spray device 3 is equipped with a vent 39 that communicates with the valve seat sealing cavity 153. The air inlet 17, the valve seat sealing cavity 153, and the vent 39 together form a gas channel. The gas channel is connected to the inside of the liquid container through the vent 39, allowing external gas to enter the liquid container. The gas channel design ensures that during use, the external atmosphere and the inside of the liquid container can interact, creating an intake or exhaust system that increases or decreases the internal pressure of the liquid container and maintains an isobaric state with the outside, thereby ensuring the suction and spraying of the liquid.

[0041] like Figures 7 to 11 As shown, a one-way valve plate 5 is provided around the side of the back spray device 3 where the air exchange port 39 is opened. The valve plate cavity 51 formed by the one-way valve plate 5 is connected to the gas channel.

[0042] like Figure 5 As shown, the trigger assembly 4 includes a trigger handle 41 with a pair of connecting holes. The piston 14 has connecting posts that can be inserted into these connecting holes. The upper end of the trigger handle 41 is connected to a pair of reset arc rods 42 that can drive the trigger handle 41 to reset. The pump body 1 has a pair of fixing posts 18 that fix the pair of reset arc rods 42. When the user presses the trigger handle 41, the reset arc rods 42 will undergo elastic deformation. When the trigger handle 41 is released, the reset arc rods 42 will return to their elastic deformation state, thereby resetting the trigger handle 41. This makes the operation simpler and less strenuous, eliminating the need to manually pry the trigger handle 41 back and forth. Liquid in the liquid container can be continuously sprayed out simply by continuously squeezing and releasing the trigger handle 41.

[0043] The lower end of the pump body 1 is connected to a locking cap 6 for connecting to a liquid container. A sealing ring 61 is provided between the locking cap 6 and the pump body 1, which can seal the liquid inside the liquid container and prevent liquid leakage.

[0044] A nozzle 7 is inserted into the pump body 1. The nozzle 7 is connected to the liquid spraying channel 11. A detachable nozzle 8 is provided at the front end of the nozzle 7. In this embodiment, the nozzle 8 is a foaming nozzle. The liquid sprayed through this foaming nozzle will be in the form of foam, which can realize foam spraying. In practical applications, the nozzle 8 can be set as a spray nozzle to realize spraying. Since the nozzle 8 can be detached, the effect of spraying or spraying foam can be achieved by replacing the nozzle 8.

[0045] In this embodiment, the pistol pump is made entirely of plastic, which avoids the corrosion problems caused by using metal components such as metal springs. At the same time, the pistol pump can be recycled without first removing the metal parts on the pistol pump, resulting in very high recycling efficiency.

[0046] like Figures 1 to 4 As shown, in this embodiment, the pump body 1 is detachably installed inside the housing 2 and is relatively independent of the housing 2. The independent design of the pump body 1 can match different types of housing 2.

[0047] like Figure 2 , Figure 4 and Figure 12As shown, a suction tube 9 is provided on the upright liquid inlet channel 331, which is inserted into the liquid container. When using this pistol pump for the first time, the trigger assembly 4 drives the piston 14 to move outward. At this time, the volume of the liquid inlet chamber 11 increases, generating negative pressure, which acts on the valve core check plate 163, causing the valve core check plate 163 to move upward and open the valve core check plate 163, connecting the liquid inlet chamber 35 with the liquid outlet space A. When the pistol pump is upright, the liquid inside the liquid container will pass through the suction tube 9 and the upright liquid inlet channel 331, enter the liquid outlet space A through the liquid inlet chamber 35, and then reach the liquid inlet chamber 11. When the pistol pump is inverted, the liquid inside the liquid container will enter the liquid inlet chamber 35 through the inverted liquid inlet channel 36 and the liquid inlet hole 34, then enter the liquid outlet space A through the liquid inlet chamber 35, and finally reach the liquid inlet chamber 11.

[0048] like Figure 2 , Figure 4 and Figure 13 As shown, when the pistol pump is in the upright position, both the liquid container and the pistol pump are in an upright position. In the upright position, the pump ball 32 blocks the connection between the inverted liquid inlet channel 36 and the liquid inlet hole 34. When the trigger assembly 4 is pulled, the trigger assembly 4 pushes the piston 14, thereby squeezing the liquid in the liquid inlet chamber 11. The liquid enters the liquid outlet space A from the liquid inlet chamber 11, pushing the elastic valve core 16 to deform downward, thereby connecting the liquid outlet space A with the pressure channel 12. The liquid passes through the pressure channel 12 and the spray channel 11, and finally sprays out through the nozzle 7. At this time, due to the liquid being sprayed out, the pressure generated in the liquid container decreases, and external air enters the air inlet 17, then enters the valve chamber 51 of the ventilation one-way valve plate 5 through the gas channel, and then enters the liquid container through the ventilation one-way valve plate 5, making the air pressure inside the liquid container the same as the external atmospheric pressure, thus facilitating the use of the pistol pump to extract the liquid from the liquid container. After releasing the trigger assembly 4, the trigger handle 41 is reset by the action of the reset arc rod 42. The liquid inside the liquid container enters the liquid outlet space A and the liquid inlet chamber 11 through the suction tube 9 and the upright liquid inlet channel 331, and completes a new liquid filling. Repeating the above steps will achieve continuous spraying.

[0049] like Figure 12 , Figure 14 and Figure 15As shown, when the pistol pump is used in the inverted state, both the liquid container and the pistol pump are in an inverted position. The pump ball 32 leaves the upper port of the universal valve seat 31 under the action of gravity, and the inverted liquid inlet channel 36 is connected to the liquid inlet hole 34. When the trigger assembly 4 is pulled, the trigger assembly 4 pushes the piston 14, thereby squeezing the liquid in the liquid inlet chamber 11. The liquid enters the liquid outlet space A from the liquid inlet chamber 11, pushing the elastic valve core 16 to deform away from the liquid inlet chamber 11, thereby connecting the liquid outlet space A with the liquid pressure channel 12. The liquid passes through the liquid pressure channel 12 and the liquid spraying channel 11, and finally sprays out through the nozzle 7. At this time, due to the liquid being sprayed out, the pressure generated in the liquid container decreases, and external air enters the air inlet 17, and then enters the valve plate cavity 51 of the ventilation one-way valve plate 5 through the gas channel, and then enters the liquid container through the ventilation one-way valve plate 5, so that the air pressure inside the liquid container is the same as the external atmospheric pressure. After releasing the trigger assembly 4, the trigger handle 41 is reset by the action of the reset arc rod 42. The liquid inside the liquid container is drawn into the inlet chamber 35 through the inlet hole 34 from the inverted inlet channel 36, and then enters the outlet space A and the liquid inlet chamber 11 to complete a new liquid filling. By repeating the above steps, continuous spraying can be achieved.

[0050] This invention integrates the upright liquid inlet channel 331 and the inverted liquid inlet channel 36 into a single inverted spray device 3. It can achieve liquid spraying from the container in both upright and inverted states of the pistol pump, while effectively simplifying the internal structure and making the spray volume more stable in both upright and inverted states. It effectively solves the problems of complex structure, difficult manufacturing and assembly, and high cost of upright and inverted pistol pumps.

[0051] The above are merely preferred embodiments of the present invention. Any technical solution that achieves the purpose of the present invention by essentially the same means is within the protection scope of the present invention.

Claims

1. An inverted all-plastic pistol pump, characterized in that, The system includes a pump body (1), on which a housing (2) is fitted. Inside the pump body (1) are a liquid spraying channel (11) and a liquid pressurizing channel (12) that are interconnected. Inside the pump body (1) is a liquid inlet chamber (13), and inside the liquid inlet chamber (13) is a piston (14). The pump body (1) also has a valve chamber (15) that communicates with the liquid inlet chamber (13) and the liquid pressurizing channel (12). Inside the valve chamber (15) is an elastic valve core (16), which includes an upper elastic tube (161) and a lower elastic tube (162). The upper elastic tube (161) and the lower elastic tube (162) can be connected to each other. A valve core check plate (163) is provided on the lower part of the pump body (16). A back spray device (3) for realizing the forward and reverse spray functions of the pistol pump is inserted into the side of the elastic valve core (16) facing the liquid container. A trigger assembly (4) that can drive the piston (14) is also hinged on the pump body (1). An air inlet (17) for allowing external air to enter the liquid container is also provided on the pump body (1). The back spray device (3) includes a universal valve seat (31) that is engaged with the elastic valve core (16) and a universal valve base (33). A forward liquid inlet channel (331) is provided on the bottom side of the universal valve base (33). 3) An inlet hole (34) connected to the upright inlet channel (331) is also provided; an inverted inlet channel (36) and a one-way backflow valve are provided on the side of the universal valve seat (31), the one-way backflow valve is used to control the opening and closing between the inverted inlet channel (36) and the inlet hole (34); the universal valve seat (31) is also provided with an inlet chamber (35) connected to the inner cavity of the lower elastic tube (162) and the inlet hole (34), the liquid in the liquid container can enter the inlet chamber (35) through the inlet hole (34) from the upright inlet channel (331), and the liquid in the inlet chamber (35) can enter the inlet chamber (35) through the lower elastic tube (162). 62) The inner cavity enters the inner cavity of the upper elastic tube (161) through the valve core check plate (163). The valve cavity (15) is formed from the inside to the outside by a valve core insertion cavity (151), a valve seat sealing snap-fit ​​inner cavity (152) and a valve seat sealing snap-fit ​​outer cavity (153). The valve core insertion cavity (151) is connected to the liquid inlet cavity (13), and the valve seat sealing snap-fit ​​outer cavity (153) is connected to the air inlet (17). The back spray device (3) is provided with an inner insertion ring wall (37) and an outer insertion ring wall (38), which are respectively inserted into the valve seat sealing snap-fit ​​inner cavity (152) and the valve seat sealing snap-fit ​​outer cavity (153).

2. The inverted all-plastic pistol pump according to claim 1, characterized in that, The one-way backflow valve includes a pump ball (32) movably disposed inside the universal valve seat (31); when the pistol pump is in the upright position, the pump ball (32) blocks the communication between the inverted liquid inlet channel (36) and the liquid inlet hole (34), and the liquid in the liquid container can only enter the liquid inlet chamber (35) through the liquid inlet hole (34) via the upright liquid inlet channel (331); when the pistol pump is in the inverted position, the inverted liquid inlet channel (36) is connected to the liquid inlet hole (34), and the liquid in the liquid container can enter the liquid inlet chamber (35) through the liquid inlet hole (34) via the inverted liquid inlet channel (36).

3. The inverted all-plastic pistol pump according to claim 1, characterized in that, The outer wall of the upper elastic tube (161) is elastically sealed to the inner wall of the valve core insertion cavity (151). The elastic valve core (16) is located inside the cavity formed by the inner insertion ring wall (37) of the back spray device (3) and can move up and down elastically.

4. The inverted all-plastic pistol pump according to claim 1, characterized in that, The back spray device (3) is provided with an air exchange port (39) that communicates with the valve seat sealing snap-fit ​​outer cavity (153). The air inlet (17), the valve seat sealing snap-fit ​​outer cavity (153) and the air exchange port (39) together form a gas channel.

5. The inverted all-plastic pistol pump according to claim 4, characterized in that, The side of the back spray device (3) with the opening of the air exchange port (39) is surrounded by a one-way valve plate (5) for air exchange. The valve plate cavity (51) formed by the one-way valve plate (5) is connected to the gas channel.

6. The inverted all-plastic pistol pump according to claim 1, characterized in that, The trigger assembly (4) includes a trigger handle (41), which has a pair of connecting holes. The piston (14) has connecting posts that can be inserted into the pair of connecting holes. The upper end of the trigger handle (41) is connected to a pair of reset arc rods (42) that can drive the trigger handle (41) to reset. The pump body (1) has a pair of fixing posts (18) that fix the pair of reset arc rods (42).

7. The inverted all-plastic pistol pump according to claim 1, characterized in that, The lower end of the pump body (1) is connected to a lock cap (6) for connecting to a liquid container, and a sealing ring (61) is provided between the lock cap (6) and the pump body (1).

8. The inverted all-plastic pistol pump according to claim 1, characterized in that, The pump body (1) is connected to a nozzle (7), which is connected to the liquid spraying channel (11). The nozzle (7) has a detachable nozzle (8) at its front end.

Images