pressing pump

Abstract

The utility model discloses a press pump, including casing, press head and piston, the casing has the pump chamber, the press head has the liquid outlet pipe, the piston is arranged on the liquid outlet pipe and divides the pump chamber into upper pump cavity and lower pump cavity, and the lower pump cavity communicates with the liquid outlet pipe through the liquid outlet, is equipped with the liquid inlet valve on the lower pump cavity cavity wall, the liquid inlet valve has the liquid inlet cutout, and the piston can move the opening and closing of liquid outlet pipe, and can compress or release the gas in the lower pump cavity with the liquid outlet pipe movement and make the liquid inlet cutout expand and open or contract and close. The utility model discloses through the configuration piston on the liquid outlet pipe, is equipped with the liquid inlet valve in the lower pump cavity, is equipped with the liquid inlet cutout on the liquid inlet valve, and the piston can move the opening and closing of liquid outlet pipe, and can compress or release the gas in the lower pump cavity with the liquid outlet pipe movement and make the liquid inlet cutout expand and open or contract and close, realizes the liquid outlet and stop liquid outlet of press head, and the structure is simple and compact, and the assembly is simple, simultaneously, the liquid inlet valve is made of silica gel, effectively avoids the rust problem and can recycle, more environmental protection.

Description

Technical Field

[0001] This utility model relates to a push-button pump. Background Technology

[0002] A push-button pump, also known as a hand pump or metering pump, is widely used in the packaging of daily chemical products such as hand sanitizer, shampoo, and skincare products. Its core design goal is to dispense a specific amount of liquid with each press while preventing backflow and leakage. Existing push-button pumps include a housing, pump head, inlet ball valve, and outlet ball valve. When the pump head is pressed down, the inlet ball valve closes, the outlet ball valve opens, and liquid flows from the pump head. When the pump head moves back to its original position, the outlet ball valve closes, the inlet ball valve opens, and the pump head stops dispensing liquid. Because existing push-button pumps use inlet and outlet ball valves to control the dispensing and stopping of liquid flow, they have many components, are complex to assemble, and the inlet and outlet ball valves are made of metal, making them prone to rusting and contaminating the solution upon contact. Summary of the Invention

[0003] The purpose of this utility model is to provide a press pump to solve the problem that existing press pumps use inlet ball valves and outlet ball valves to achieve liquid discharge or stop liquid discharge from the pump head, resulting in many components and complex assembly.

[0004] This utility model is achieved through the following technical solution: A push-button pump includes a housing, a push-button head, and a piston. The housing has a pump chamber. The push-button head is movable relative to the housing and has a liquid outlet pipe extending into the pump chamber. The piston passes through the liquid outlet pipe and divides the pump chamber into an upper pump chamber and a lower pump chamber. The lower pump chamber is connected to the liquid outlet pipe via a liquid outlet. The lower pump chamber wall is provided with a liquid inlet valve. The liquid inlet valve has a liquid inlet slit that can expand or contract and close. The piston can move relative to the liquid outlet pipe to open and close the liquid outlet, and can move with the liquid outlet pipe to compress or release the gas in the lower pump chamber, causing the liquid inlet slit to expand or contract and close.

[0005] Furthermore, the inlet valve is detachably and fixedly connected to the housing. One of the housing and the inlet valve is provided with a plug-in part, and the other of the two is provided with a slot that engages with the plug-in part.

[0006] Furthermore, the housing has a communication hole communicating with the lower pump chamber, the slot is formed on the cavity wall of the lower pump chamber and surrounds the communication hole, the liquid inlet valve has a cover part and the insertion part, the cover part covers the communication hole and has the liquid inlet cut, and the insertion part extends circumferentially around the cover part and is inserted into the slot.

[0007] Furthermore, the abutment portion is located in the middle of the insertion portion.

[0008] Furthermore, the inlet valve is made of plastic.

[0009] Furthermore, the inlet valve is cylindrical, and the inlet slit extends circumferentially along the inlet valve. There are several inlet slits, which are spaced apart circumferentially on the inlet valve.

[0010] Furthermore, the housing is provided with an air inlet, which communicates with the upper pump chamber when the pressing head moves down.

[0011] Furthermore, the pressing head also has a liquid inlet column located at the lower end of the liquid outlet pipe. The liquid inlet column and the liquid outlet pipe together form a liquid inlet channel connecting the liquid outlet pipe and the lower pump chamber. The liquid inlet channel is connected to the lower pump chamber via the liquid outlet. The liquid outlet pipe has an upper shoulder for abutting against the piston. The liquid inlet column has a lower shoulder located below the upper shoulder for abutting against the piston. The piston can move relative to the liquid outlet pipe between the upper shoulder and the lower shoulder to open and close the liquid outlet.

[0012] Furthermore, the housing has an assembly cavity through which the liquid outlet pipe passes, the assembly cavity being located above the pump chamber, and an elastic element passing through the liquid outlet pipe is provided in the assembly cavity, the pressing head being driven upward by the elastic element.

[0013] Furthermore, the housing has an assembly cavity through which the liquid outlet pipe passes, the assembly cavity being located above the pump chamber, and an elastic element passing through the liquid outlet pipe is provided in the assembly cavity, the pressing head being driven upward by the elastic element.

[0014] The advantages of this technical solution are that by configuring a piston on the outlet pipe to divide the pump chamber into an upper pump chamber and a lower pump chamber, and configuring an inlet valve in the lower pump chamber with an inlet slit on the inlet valve, the piston can move relative to the outlet pipe to open and close the outlet. It can also move with the outlet pipe to compress or release the gas in the lower pump chamber, causing the inlet slit to expand or contract under pressure, thereby realizing the dispensing and stopping of dispensing from the pressing head. The structure is simple and compact, and the assembly is simple. At the same time, the inlet valve is made of silicone, which effectively avoids the problem of rusting and can be recycled, making it more environmentally friendly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1 This is a cross-sectional view of the press pump according to an embodiment of the present invention. Figure 1 (Press head to reset position); Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 2 A magnified view of a section at point B in the middle; Figure 4 This is a cross-sectional view of the press pump according to an embodiment of the present invention. Figure 2 (Press head in the depressed state); Figure 5 yes Figure 4 A magnified view of a section at point C; Figure 6 This is a top view of the inlet valve in an embodiment of this utility model. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Figure 1-6 As shown, the press pump includes a housing 1, a press head 2, and a piston 3. The housing 1 has a pump chamber 101. The press head 2 can move up and down relative to the housing 1 and has a liquid outlet pipe 201 extending into the pump chamber 101. The piston 3 passes through the liquid outlet pipe 201 and divides the pump chamber 101 into a mutually sealed upper pump chamber 102 and a lower pump chamber 103. The lower pump chamber 103 is connected to the liquid outlet pipe 201 through a liquid outlet 104. An inlet valve 4 is provided on the wall of the lower pump chamber 103. The inlet valve 4 has an inlet cut 401 that can expand or contract and close. The piston 3 can move relative to the liquid outlet pipe 201 to open and close the liquid outlet 104, and can move with the liquid outlet pipe 201 to compress or release the gas in the lower pump chamber 103, causing the inlet cut 401 to expand or contract and close. Specifically, when the pressing head 2 moves downward relative to the housing 1, the piston 3 first moves upward relative to the liquid outlet 201 to open the liquid outlet 104, and then moves downward with the liquid outlet 201 to compress the gas in the lower pump chamber 103, causing the liquid inlet slit 401 to contract and close; when the pressing head 2 moves upward relative to the housing 1, the piston 3 first moves downward relative to the liquid outlet 201 to close the liquid outlet 104, and then moves upward with the liquid outlet 201 to release the gas in the lower pump chamber 103, causing the liquid inlet slit 401 to expand and unfold.

[0020] The inlet valve 4 is made of plastic, but may be made of silicone, though not limited to silicone.

[0021] When the pump is mounted on the bottle, the lower pump chamber 103 is connected to the bottle cavity via the inlet slit 401. When the inlet slit 401 expands, the solution in the bottle cavity enters the lower pump chamber 103 through the inlet slit 401.

[0022] The operation steps of the press pump are as follows: When the press head 2 moves downward, the piston 3 first moves upward relative to the liquid outlet pipe 201 to open the liquid outlet 104 and abut against the liquid outlet pipe 201. As the liquid outlet pipe 201 moves downward, it compresses the gas in the lower pump chamber 103, causing the liquid inlet slit 401 to contract and close, thus realizing the liquid discharge of the press head 2; when the press head 2 moves upward to reset, the piston 3 first moves downward relative to the liquid outlet pipe 201 to close the liquid outlet 104, and then moves upward with the liquid outlet pipe 201 to release the gas in the lower pump chamber 103, so that a negative pressure is formed in the lower pump chamber 103, causing the liquid inlet slit 401 to expand and open, so that the press head 2 stops discharging liquid while simultaneously replenishing the lower pump chamber 103.

[0023] In summary, this embodiment provides a push-button pump to solve the problems of existing push-button pumps that use inlet and outlet ball valves to achieve liquid dispensing and stopping of the pump head, resulting in numerous components and complex assembly. The solution mainly involves configuring a piston 3 on the outlet pipe 201 to divide the pump chamber 101 into an upper pump chamber 102 and a lower pump chamber 103. An inlet valve 4 is configured in the lower pump chamber 103, and an inlet slit 401 is configured on the inlet valve 4. The piston 3 can move relative to the outlet pipe 201 to open and close the outlet 104, and can also move with the outlet pipe 201 to compress or release the gas in the lower pump chamber 103, causing the inlet slit 401 to expand or contract under pressure, thus achieving liquid dispensing and stopping of the push-button 2. The structure is simple and compact, and assembly is easy. Furthermore, the inlet valve 4 is made of silicone, effectively avoiding rusting and allowing for recycling, making it more environmentally friendly.

[0024] In this embodiment of the present invention, the inlet valve 4 is detachably and fixedly connected to the housing 1. The inlet valve 4 has a plug-in portion 402, and the housing 1 is provided with a slot 105 that engages with the plug-in portion 402. The above arrangement, by configuring the plug-in portion 402 on the inlet valve 4 and the slot 105 on the housing 1, makes the assembly of the inlet valve 4 and the housing 1 stable and easy to disassemble and assemble.

[0025] In other embodiments, the plug portion 402 is disposed on the housing 1, and the slot 105 is disposed on the liquid inlet valve 4.

[0026] In this embodiment of the present invention, the housing 1 has a communicating hole 106 communicating with the lower pump chamber 103, and the slot 105 is opened on the cavity wall of the lower pump chamber 103 and surrounds the communicating hole 106. The liquid inlet valve 4 has a cover part 403 and a plug part 402. The cover part 403 covers the communicating hole 106 and has a liquid inlet cut 401. The plug part 402 extends circumferentially around the cover part 403 and is plugged into the slot 105.

[0027] In this embodiment of the utility model, the cover portion 403 is disposed in the middle of the insertion portion 402.

[0028] In this embodiment of the invention, the liquid inlet slit 401 extends circumferentially along the liquid inlet valve 4, and there are several liquid inlet slits 401, which are spaced apart circumferentially around the liquid inlet valve 4. This arrangement, by configuring the liquid inlet slits 401 to extend circumferentially along the liquid inlet valve 4 and forming multiple slits, ensures good liquid inlet performance when the liquid inlet slits 401 expand and unfold.

[0029] In this embodiment of the invention, the housing 1 is provided with an air inlet 107 that communicates with the upper pump chamber 102 when the pressing head 2 moves downward. This arrangement, by configuring the air inlet 107 on the housing 1 that communicates with the upper pump chamber 102 when the pressing head 2 moves downward, ensures smooth movement of the pressing head 2 when it compresses the gas in the lower pump chamber 103.

[0030] In this embodiment of the present invention, the pressing head 2 also has an inlet column 203 located at the lower end of the outlet pipe 201. The inlet column 203 and the outlet pipe 201 together form an inlet channel 204 that connects the outlet pipe 201 and the lower pump chamber 103. The inlet channel 204 is connected to the lower pump chamber 103 through the outlet port 104. The outlet pipe 201 has an upper shoulder 202 for abutting against the piston 3. The inlet column 203 has a lower shoulder 205 located below the upper shoulder 202 for abutting against the piston 3. The piston 3 can move relative to the outlet pipe 201 between the upper shoulder 202 and the lower shoulder 205 to open and close the outlet port 104. Specifically, when the pressing head 2 moves downward, the piston 3 first moves upward relative to the outlet pipe 201, abutting against the upper shoulder 202 to open the outlet 104, and then moves downward with the outlet pipe 201 to compress the gas in the lower pump chamber 103. When the pressing head 2 moves upward, the piston 3 first moves downward relative to the outlet pipe 201, abutting against the lower shoulder 205 to close the outlet 104, and then moves upward with the outlet pipe 201 to release the gas in the lower pump chamber 103. The above arrangement, by configuring the upper shoulder 202 on the outlet pipe 201 and the lower shoulder 205 on the inlet column 203, allows the piston 3 to move relative to the outlet pipe 201 to open and close the outlet 104 when the pressing head 2 moves relative to the housing 1. The structure is compact and simple.

[0031] In this embodiment of the invention, the housing 1 has an assembly cavity 108 through which the liquid outlet pipe 201 passes. The assembly cavity 108 is sealed to the pump chamber 101 and located above the pump chamber 101. An elastic element 7 is provided inside the assembly cavity 108 and passes through the liquid outlet pipe 201. The pressing head 2 is driven upward by the elastic element 7. Specifically, the elastic element 7 is a spring. The above arrangement, by configuring the assembly cavity 108 on the housing 1 above the pump chamber 101 and configuring the elastic element 7 passing through the liquid outlet pipe 201 inside the assembly cavity 108, allows the pressing head 2 to move upward and reset while preventing the elastic element 7 from contaminating the solution.

[0032] In this embodiment of the invention, the housing 1 includes an outer shell 109 and an inner shell 110. The inner shell 110 is embedded within the outer shell 109 and together with the outer shell 109 forms an assembly cavity 108 and a pump chamber 101. When the pressing head 2 is reset to its position, the piston 3 abuts against the lower shoulder 205 and the inner shell 110, respectively. This configuration, by setting the housing 1 so that the outer shell 109 and the inner shell 110 together form the assembly cavity 108 and the pump chamber 101, ensures that the piston 3 has a good closing effect when the pressing head 2 is reset to its position.

[0033] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered as protected by this utility model.

Claims

1. A squeeze pump comprising a housing, a squeeze head and a piston, characterized in that, The shell has a pump chamber, the pressing head is movable relative to the shell and has a liquid outlet pipe extending into the pump chamber, the piston is arranged on the liquid outlet pipe to divide the pump chamber into an upper pump cavity and a lower pump cavity, the lower pump cavity is communicated with the liquid outlet pipe through a liquid outlet, and the lower pump cavity is provided with a liquid inlet valve having a liquid inlet slit capable of being expanded and closed. The piston is movable relative to the liquid outlet pipe to open and close the liquid outlet, and is movable with the liquid outlet pipe to compress or release the gas in the lower pump cavity to expand and close the liquid inlet slit.

2. The squeeze pump of claim 1, wherein The liquid inlet valve is detachably fixed to the shell, one of the shell and the liquid inlet valve is provided with a plug-in part, and the other is provided with a plug-in groove matched with the plug-in part.

3. The squeeze pump of claim 2, wherein The shell has a communication hole communicated with the lower pump cavity, and the plug-in groove is arranged on the cavity wall of the lower pump cavity and surrounds the communication hole. The liquid inlet valve has a cover part and the plug-in part, the cover part covers the communication hole and has the liquid inlet slit, and the plug-in part extends circumferentially around the cover part and is matched with the plug-in groove.

4. The squeeze pump of claim 3, wherein The cover part is arranged in the middle of the plug-in part.

5. The squeeze pump of claim 1, wherein The liquid inlet valve is made of plastic.

6. The squeeze pump of claim 1, wherein The liquid inlet valve is cylindrical, the liquid inlet slit extends circumferentially around the liquid inlet valve, and the liquid inlet slit is a plurality of liquid inlet slits arranged at intervals in the circumferential direction of the liquid inlet valve.

7. The squeeze pump of claim 1, wherein The shell is provided with an air inlet, and the air inlet is communicated with the upper pump cavity when the pressing head moves downward.

8. The squeeze pump of claim 1, wherein The pressing head further has a liquid inlet column arranged at the lower end of the liquid outlet pipe, the liquid inlet column and the liquid outlet pipe jointly form a liquid inlet channel communicated with the liquid outlet pipe and the lower pump cavity, and the liquid inlet channel is communicated with the lower pump cavity through the liquid outlet. The liquid outlet pipe has an upper abutting shoulder for abutting against the piston, the liquid inlet column has a lower abutting shoulder below the upper abutting shoulder, the lower abutting shoulder is used for abutting against the piston, and the piston is movable relative to the liquid outlet pipe between the upper abutting shoulder and the lower abutting shoulder to open and close the liquid outlet.

9. The squeeze pump of claim 8, wherein The shell has an assembly cavity for the liquid outlet pipe to pass through, the assembly cavity is located above the pump chamber, the assembly cavity is provided with an elastic member arranged on the liquid outlet pipe, and the pressing head is driven to move upward by the elastic member.

10. The squeeze pump of claim 9, wherein The shell includes an outer shell and an inner shell, the inner shell is embedded in the outer shell to jointly form the assembly cavity and the pump chamber with the outer shell, and the piston abuts against the lower abutting shoulder and the inner shell respectively when the pressing head is reset.

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