All-plastic hand gun pump

Abstract

The application discloses a full-plastic handgun pump, which comprises a pump body, a liquid leading cavity arranged in the pump body, a valve cavity arranged on the pump body and communicated with the liquid leading cavity, a liquid inlet channel and a liquid spraying channel communicated with the valve cavity, a valve core arranged in the valve cavity, a first elastic valve plate arranged on the valve core and located at the outlet of the liquid inlet channel, and a second elastic valve plate arranged on the valve core and located between the liquid leading cavity and the liquid spraying channel, the first elastic valve plate covers the outlet of the liquid inlet channel to form a first one-way valve, the second elastic valve plate is attached to the inner wall of the valve cavity to form a second one-way valve between the liquid leading cavity and the liquid spraying channel, a piston is arranged in the liquid leading cavity, and a trigger assembly capable of driving the piston to move is hingedly arranged on the pump body. The handgun pump is entirely made of plastic, corrosion problems caused by metal components such as metal springs are avoided, and the recovery efficiency is very high since metal components on the handgun pump do not need to be removed before recycling.

Description

Technical Field

[0001] This invention relates to an all-plastic pistol pump. Background Technology

[0002] Currently, to facilitate the removal of liquid from bottles, a pistol pump is typically installed at the bottle opening to pump out the liquid. Modern pistol pumps generally have a one-way valve in the inlet channel. During liquid inlet, a piston in the inlet chamber moves outward, expanding the chamber and creating negative pressure. This negative pressure is then created in the inlet channel through the connection between the inlet chamber and the inlet channel, drawing the liquid into the inlet chamber. The piston then moves inward, forcing the liquid into the spray channel and out through the nozzle. To ensure continuous pumping, a spring or other elastic element is needed at the one-way valve to allow it to reset. However, these elements are typically made of metal. Recycling these pistol pumps requires removing the metal components, resulting in low recycling efficiency. Currently, there is no effective solution to this problem.

[0003] This invention is based on the above circumstances. Summary of the Invention

[0004] This invention overcomes the shortcomings of the prior art and provides an all-plastic pistol pump that does not require disassembly during recycling, has high recycling efficiency, and adopts an integrated valve structure. One part can solve both unidirectional liquid inlet and outlet functions, and the structure is simple and easy to manufacture.

[0005] This invention is achieved through the following technical solution:

[0006] A fully plastic pistol pump includes a pump body with a housing fitted onto it. The pump body has a liquid inlet chamber and a valve chamber communicating with the liquid inlet chamber. The valve chamber has an inlet channel and a spray channel connected to it. The valve chamber contains a valve core, a first elastic valve plate located on the valve core at the outlet of the inlet channel, and a second elastic valve plate located on the valve core between the liquid inlet chamber and the spray channel. The first elastic valve plate covers the outlet of the inlet channel to form a first one-way valve. The second elastic valve plate is fitted against the inner wall of the valve chamber to form a second one-way valve between the liquid inlet chamber and the spray channel. A piston is located within the liquid inlet chamber, and a trigger assembly that drives the piston is hinged to the pump body.

[0007] The first elastic valve plate is disc-shaped and located at the lower end of the valve core, while the second elastic valve plate is funnel-shaped and located above the first elastic valve plate.

[0008] The valve core, the first elastic valve plate, and the second elastic valve plate are integrally formed.

[0009] The trigger assembly includes a trigger handle, a pair of connecting holes on the trigger handle, a connecting post that can be inserted into the pair of connecting holes on the piston, a pair of reset arc rods connected to the upper end of the trigger handle that can drive the trigger handle to reset, and a pair of fixing posts that fix the pair of reset arc rods on the pump body.

[0010] The valve core has an insertion hole at its upper end, and the housing has a plug-in post at the position corresponding to the insertion hole. The plug-in post is inserted into the insertion hole and the upper end of the valve core rests on the housing, thereby fixing the valve core in the valve cavity.

[0011] The lower end of the pump body is connected to a bottle cap for connecting to a bottle, and the pump body is provided with an air inlet for allowing air to enter the bottle.

[0012] The aforementioned pistol pump is made entirely of PP and PE materials.

[0013] The ratio of PP to PE is 9:1.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The pistol pump of the present invention 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, and the recycling efficiency is very high.

[0016] 2. In this invention, the outward movement of the piston creates a negative pressure in the liquid inlet chamber, thereby opening the first elastic valve and drawing the liquid into the liquid inlet chamber. Then, the inward movement of the piston squeezes the liquid in the liquid inlet chamber, thereby opening the second elastic valve and allowing the liquid to enter the spray channel and be sprayed out. When the piston draws the liquid into the liquid inlet chamber, the second elastic valve prevents air from entering the liquid inlet chamber from the spray channel, allowing the liquid in the bottle to be drawn into the liquid inlet chamber more effectively. When the piston squeezes the liquid into the spray channel, the first elastic valve blocks the inlet channel, preventing the liquid in the liquid inlet chamber from flowing back into the inlet channel, thus improving the spraying effect.

[0017] 3. The valve core, the first elastic valve plate, and the second elastic valve plate are integrally molded, which allows a single part to simultaneously solve the functions of unidirectional liquid inlet and outlet, and also makes the assembly of the pistol pump simpler.

[0018] 4. The present invention has a simple structure, reduces the number of parts, lowers manufacturing costs, and improves assembly efficiency. Attached Figure Description

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a cross-sectional view of the present invention;

[0021] Figure 2This is a schematic diagram of the structure of the present invention;

[0022] Figure 3 This is an exploded view of the present invention;

[0023] Figure 4 This is a schematic diagram of the valve body in this invention. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings:

[0025] like Figures 1 to 4 The illustrated all-plastic pistol pump includes a pump body 1, a housing 2 fitted onto the pump body 1, a liquid inlet chamber 11 inside the pump body 1, and a valve chamber 12 communicating with the liquid inlet chamber 11. The valve chamber 12 is connected to an inlet channel 3 and a spray channel 4. The valve chamber 12 contains a valve core 51, a first elastic valve plate 52 located on the valve core 51 at the outlet of the liquid inlet channel 3, and a second elastic valve plate 53 located on the valve core 51 between the liquid inlet chamber 11 and the spray channel 4. The first elastic valve plate 52 covers the outlet of the liquid inlet channel 3 to form a first one-way valve, and the second elastic valve plate 53 is fitted against the inner wall of the valve chamber 12 to form a second one-way valve located between the liquid inlet chamber 11 and the spray channel 4. A piston 6 is provided inside the liquid inlet chamber 11, and a trigger assembly 7 that can drive the piston 6 is hinged to the pump body 1.

[0026] The inlet channel 3 is equipped with a straw 40 that inserts into the bottle. When using the pistol pump for the first time, the trigger assembly 7 drives the piston 6 outward. At this time, the volume of the liquid inlet chamber 11 increases, generating negative pressure, which acts directly on the first elastic valve plate 52, causing the first elastic valve plate 52 to open. This allows the liquid in the bottle to enter the liquid inlet chamber 11 through the straw 40 and the inlet channel 3. When the trigger assembly 7 is pulled, it pushes the piston 6, thereby squeezing the liquid in the liquid inlet chamber 11. At this time, the liquid in the liquid inlet chamber 11 pushes open the second elastic valve plate 53, thus entering the spray channel 4 and being sprayed out from the nozzle. When the liquid is drawn into the liquid inlet chamber 11 by the piston 6, the second elastic valve plate 53 prevents air from entering the liquid inlet chamber 11 from the spray channel 4, allowing the liquid in the bottle to be drawn into the liquid inlet chamber 11 better. When the liquid is squeezed into the spray channel 4 by the piston 6, the first elastic valve plate 52 blocks the liquid inlet channel 4, preventing the liquid in the liquid inlet chamber 11 from flowing back into the liquid inlet channel 4, thereby improving the spraying effect.

[0027] The lower end of the pump body 1 is connected to a bottle cap 30 for connecting to a bottle, and the pump body 1 is provided with an air inlet 31 for allowing air to enter the bottle. The pistol pump is mounted on the bottle through the bottle cap 30, and air enters the bottle through the air inlet 31, making the air pressure in the bottle the same as the atmospheric pressure, thereby facilitating the use of the pistol pump to extract liquid from the bottle.

[0028] The pistol pump is entirely made of PP and PE materials, with a PP to PE ratio of 9:1. This avoids the corrosion problems caused by using metal components such as metal springs. Furthermore, recycling the pistol pump does not require removing the metal parts, resulting in very high recycling efficiency.

[0029] The first elastic valve plate 52 is disc-shaped and located at the lower end of the valve core 51, while the second elastic valve plate 53 is funnel-shaped and located above the first elastic valve plate 52.

[0030] The valve core 51, the first elastic valve plate 52, and the second elastic valve plate 53 are integrally molded to form a valve body. This allows a single part to simultaneously handle both unidirectional liquid inlet and outlet functions, while also reducing the number of parts in the pistol pump, simplifying the structure, making the assembly of the pistol pump easier, reducing manufacturing costs, and improving assembly efficiency.

[0031] The pump body 1 is detachably installed inside the housing 2, and the valve body is also detachably installed inside the pump body 1. The pump body 1 and the valve body are designed independently. When the valve body is damaged, the valve body can be replaced separately without replacing the entire pistol pump, reducing material waste. The independent design of the pump body 1 can be matched with different types of housing 2.

[0032] The trigger assembly 7 includes a trigger handle 71 with a pair of connecting holes. The piston 6 has connecting posts 61 that can be inserted into these connecting holes. A pair of reset arc rods 8 are connected to the upper end of the trigger handle 71 to reset it. The pump body 1 has a pair of fixing posts 9 to fix the reset arc rods 8. When the user presses the trigger handle 71, the reset arc rods 8 undergo elastic deformation. When the user releases the trigger handle 71, the reset arc rods 8 return to their elastic deformation state, thus resetting the trigger handle 71. This makes operation simpler and less strenuous, eliminating the need to manually pry the trigger handle 71 back and forth; liquid from the bottle can be continuously ejected simply by continuously squeezing and releasing the trigger handle 71.

[0033] The upper end of the valve core 51 is provided with a socket 511. The housing 2 is provided with a plug post 20 at the position corresponding to the socket 511. The plug post 20 is inserted into the socket 511 and the upper end of the valve core 51 is pressed against the housing 2, thereby fixing the valve core 51 in the valve cavity 12. This prevents the valve core 51 from moving and causing the first elastic valve plate 52 to leave the liquid inlet channel 3 or the second elastic valve plate 53 to cross the channel opening of the liquid spraying channel 4, thus losing the function of the one-way valve.

Claims

1. An all-plastic pistol pump, characterized in that: The system includes a pump body (1), a housing (2) fitted onto the pump body (1), a liquid inlet chamber (11) inside the pump body (1), and a valve chamber (12) communicating with the liquid inlet chamber (11) on the pump body (1). The valve chamber (12) is connected to an inlet channel (3) and a spray channel (4). The valve chamber (12) is provided with a valve core (51), a first elastic valve plate (52) located on the valve core (51) and at the outlet of the inlet channel (3), and a valve core (51) located on the valve core (51). A second elastic valve plate (53) is provided between the liquid inlet chamber (11) and the liquid spraying channel (4). The first elastic valve plate (52) covers the outlet of the liquid inlet channel (3) to form a first one-way valve. The second elastic valve plate (53) is attached to the inner wall of the valve chamber (12) to form a second one-way valve located between the liquid inlet chamber (11) and the liquid spraying channel (4). A piston (6) is provided in the liquid inlet chamber (11). A trigger assembly (7) that can drive the piston (6) to move is also hinged on the pump body (1).

2. The all-plastic pistol pump according to claim 1, characterized in that: The first elastic valve plate (52) is disc-shaped and located at the lower end of the valve core (51), and the second elastic valve plate (53) is funnel-shaped and located above the first elastic valve plate (52).

3. The all-plastic pistol pump according to claim 2, characterized in that: The valve core (51), the first elastic valve plate (52), and the second elastic valve plate (53) are integrally formed.

4. The all-plastic pistol pump according to claim 1, characterized in that: The trigger assembly (7) includes a trigger handle (71), a pair of connecting holes are provided on the trigger handle (71), the piston (6) is provided with connecting post (61) that can be inserted into the pair of connecting holes, a pair of reset arc rods (8) are connected to the upper end of the trigger handle (71) that can drive the trigger handle (71) to reset, and a pair of fixing posts (9) are provided on the pump body (1) to fix the pair of reset arc rods (8).

5. The all-plastic pistol pump according to claim 1, characterized in that: The valve core (51) has an insertion hole (511) at its upper end. The housing (2) has a plug-in post (20) at the position corresponding to the insertion hole (511). The plug-in post (20) is inserted into the insertion hole (511) and the upper end of the valve core (51) rests on the housing (2), thereby fixing the valve core (51) in the valve cavity (12).

6. The all-plastic pistol pump according to claim 1, characterized in that: The pump body (1) is connected to a bottle cap (30) for connecting to a bottle at its lower end, and the pump body (1) is provided with an air inlet (31) for allowing air to enter the bottle.

7. The all-plastic pistol pump according to claim 1, characterized in that: The pistol pump is made entirely of PP and PE materials.

8. The all-plastic pistol pump according to claim 7, characterized in that: The ratio of PP to PE is 9:1.

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