A spring-in-bottle foam pump

Abstract

The utility model relates to foam pump technical field, especially a built -in spring foam pump, including pump core, small piston and big piston, and the big piston forms the air storage chamber with the pump core, and the big piston is connected with the movable lid, and the top of movable lid is equipped with pressing assembly, and the pressing assembly has the air inlet channel, and the small piston has the liquid passage, and the liquid passage has the mixing chamber with movable lid, and movable lid has the air outlet channel, and when pressing the pressing assembly, movable lid, big piston and small piston move downwards, and small piston will separate from big piston sealing, thereby making the air outlet channel and air storage chamber communicate, and simultaneously, the liquid in liquid passage will enter the mixing chamber, and big piston will compress the air in air storage chamber in the process of moving downwards, and makes the air in air storage chamber enter the mixing chamber through the air outlet channel and mixes with the liquid, and the whole pressing process does not have the resistance of air to promote the opening of the sheet structure, which makes the pressing feeling of pump head light, and can give the user better use experience.

Description

Technical Field

[0001] This utility model relates to the field of foam pump technology, and in particular to a foam pump with a built-in spring. Background Technology

[0002] Patent CN220949320U discloses a valve and a foam pump. When the pusher head is pressed down, the liquid product moves upward through the liquid chamber to the network outlet. The gas in the air chamber pushes the inner blade upward through the exhaust hole, causing the inner blade to move upward and separate from the mounting base. This allows the gas in the air chamber to enter the network outlet and mix with the liquid product to form foam, which is then discharged through the pusher head. When the pusher head moves upward, external gas pushes the outer blade upward through the second air inlet, the first air inlet, and the notch, causing the outer blade to move upward and separate from the mounting base. This allows the gas to enter the air chamber. The problems with the above technology are as follows: The valve has an inner and outer leaf structure. On the one hand, when pressed, the air in the pump core will cause the inner leaf of the valve to open before mixing with the liquid. This increases the force required for the inner leaf to open, resulting in a larger pressing force and an uncomfortable pressing feel. On the other hand, during rebound, the outside air will cause the outer leaf of the valve to open before air can enter the air chamber of the pump core. This requires high precision for the outer leaf of the valve. If it is too thick, the outside air will not be able to open the valve, and the pump head will easily experience abnormal rebound, affecting the functionality of the product.

[0003] To address this issue, a built-in spring foam pump is proposed to solve the aforementioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a foam pump with a built-in spring, which makes the pressing feel of the foam pump lighter.

[0005] The technical solution adopted by this utility model to solve the problem is: a built-in spring foam pump, including a pump core, a small piston movably disposed inside the pump core, a large piston connected to the upper part of the small piston, the large piston being dynamically sealed to the pump core, an air storage chamber being formed between the inner sidewall of the large piston and the inner sidewall of the pump core, a movable cover connected to the upper part of the large piston, a pressing assembly disposed on the top of the movable cover, an air inlet channel communicating with the outside and the air storage chamber being disposed on the pressing assembly, the large piston being sealed to the movable cover and disconnecting the air inlet channel from the air storage chamber, a liquid passage disposed inside the small piston, a mixing chamber disposed between the liquid passage and the movable cover, an air outlet channel communicating with the mixing chamber and the air storage chamber being disposed on the movable cover, the small piston being sealed to the large piston and disconnecting the air outlet channel from the air storage chamber.

[0006] As a further improvement to the above technical solution, the small piston has a protrusion extending horizontally outward from its side end, and an annular protrusion extending upward from the protrusion. The movable cover is provided with a downward-opening mounting groove. The upper part of the small piston is inserted into the mounting groove. The mixing chamber is located at the top of the mounting groove. The air outlet channel is located at the inner end of the mounting groove. The lower end of the mounting groove is provided with a first through hole connecting to the air outlet channel. The inner wall of the large piston is provided with a first sealing part. The lower end of the large piston is provided with a second through hole connecting the first through hole and the air storage chamber. The lower end of the first sealing part is located between the outer wall of the mounting groove and the inner wall of the annular protrusion. The first sealing part is sealed and connected to the outer wall of the mounting groove and the inner wall of the annular protrusion, and disconnects the communication between the first through hole and the second through hole. The upper end of the first sealing part is provided with a third through hole that communicates with the air intake channel and the second through hole. The outer end of the mounting groove is provided with an annular groove. The upper part of the large piston is provided with a second sealing part. The second sealing part is located in the annular groove. The second sealing part is sealed and connected to the annular groove, and disconnects the communication between the third through hole and the second through hole.

[0007] As a further improvement to the above technical solution, the inner end of the mounting groove is provided with a number of spaced ribs, and an air outlet channel is formed between adjacent ribs.

[0008] As a further improvement to the above technical solution, a third sealing part is provided on the large piston. The outer wall of the third sealing part is dynamically sealed to the inner wall of the pump core, and an air storage cavity is formed between the inner wall of the third sealing part and the inner wall of the pump core.

[0009] As a further improvement to the above technical solution, a spring is provided between the small piston and the pump core.

[0010] As a further improvement to the above technical solution, the pressing assembly includes a press head and a locking cover. The locking cover is disposed on the top of the pump core, the press head is movably connected to the locking cover, the lower part of the press head is sealed to the upper part of the movable cover, an air inlet channel is formed between the inner side wall of the locking cover and the outer side wall of the press head, and a liquid outlet channel communicating with the mixing chamber and the outside is provided inside the press head.

[0011] As a further improvement to the above technical solution, the cross-section of the first sealing part is L-shaped.

[0012] As a further improvement to the above technical solution, the second sealing part gradually tilts outward from bottom to top.

[0013] As a further improvement to the above technical solution, a network is provided in the liquid outlet channel.

[0014] The beneficial effects of this utility model are as follows: When the pressing component is pressed down, it can drive the movable cover, the large piston, and the small piston to move downward. During the movement, the small piston will disengage from the large piston, thereby connecting the air outlet channel and the air storage chamber. At the same time, the liquid in the liquid passage will enter the mixing chamber. As the large piston moves downward, it will compress the air in the air storage chamber, allowing the air in the air storage chamber to enter the mixing chamber through the air outlet channel and mix with the liquid. The entire pressing process is free of air resistance that would cause the thin plate structure to open, which makes the pump head press feel light and provides users with a better user experience. Attached Figure Description

[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a structural diagram of the foam pump of this utility model; Figure 2 This is an exploded view of the foam pump of this utility model; Figure 3 This is a top view of the foam pump of this utility model; Figure 4 for Figure 3 A cross-sectional view of section AA; Figure 5 for Figure 4 A magnified view of part A; Figure 6 This is a structural diagram of the small piston of this utility model; Figure 7 This is a structural diagram of the large piston of this utility model; Figure 8 This is a structural diagram of the large piston of this utility model from an elevation perspective; Figure 9 This is a structural diagram of the movable cover of this utility model; Figure 10 This is a cross-sectional view of the foam pump of this utility model when it is pressed. Figure 11 for Figure 10 A magnified view of part B; Figure 12 This is a cross-sectional view of the foam pump of this utility model during rebound; Figure 13 for Figure 12 A magnified view of part C.

[0017] In the diagram: 1-Pump core, 11-Air storage chamber, 2-Small piston, 21-Liquid passage, 22-Boss, 23-Annular protrusion, 3-Large piston, 31-First sealing part, 32-Second through hole, 33-Third through hole, 34-Second sealing part, 35-Third sealing part, 4-Modible cover, 41-Mixing chamber, 42-Air outlet passage, 43-Mounting groove, 44-First through hole, 45-Annular groove, 46-Rib, 5-Pressing assembly, 51-Air inlet passage, 52-Press head, 53-Lock cover, 54-Liquid outlet passage, 6-Spring, 7-Network. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 5A built-in spring foam pump includes a pump core 1, a small piston 2 movably disposed inside the pump core 1, a large piston 3 connected to the upper part of the small piston 2, the large piston 3 being dynamically sealed to the pump core 1, an air storage chamber 11 being formed between the inner sidewall of the large piston 3 and the inner sidewall of the pump core 1, a movable cover 4 connected to the upper part of the large piston 3, a pressing assembly 5 disposed on the top of the movable cover 4, an air inlet channel 51 communicating with the outside and the air storage chamber 11 on the pressing assembly 5, the large piston 3 being sealed to the movable cover 4 and disconnecting the communication between the air inlet channel 51 and the air storage chamber 11, a liquid passage 21 disposed inside the small piston 2, a mixing chamber 41 disposed between the liquid passage 21 and the movable cover 4, an air outlet channel 42 communicating with the mixing chamber 41 and the air storage chamber 11 on the movable cover 4, the small piston 2 being sealed to the large piston 3 and disconnecting the communication between the air outlet channel 42 and the air storage chamber 11; For reference Figure 11 A valve stem is movably installed inside the small piston 2. When the pressing component 5 is pressed down, the pressing component 5 can drive the movable cover 4, the large piston 3 and the small piston 2 to move downward. During the movement, the small piston 2 will disengage from the large piston 3, thereby connecting the air outlet channel 42 and the air storage chamber 11. At the same time, the valve stem will open, allowing the liquid in the liquid passage 21 to enter the mixing chamber 41. During the downward movement of the large piston 3, the air in the air storage chamber 11 will be compressed, allowing the air in the air storage chamber 11 to enter the mixing chamber 41 through the air outlet channel 42 and mix with the liquid. For reference Figure 13 When the pressing component 5 rebounds, the movable cover 4, the large piston 3, and the small piston 2 move upward. During the movement, the small piston 2 seals against the large piston 3, disconnecting the air outlet channel 42 from the air storage chamber 11. The valve stem resets and disconnects the liquid passage 21 from the mixing chamber 41. The large piston 3 disengages from the movable cover 4, thus connecting the air inlet channel 51 with the air storage chamber 11. Outside air can enter the air storage chamber 11 through the air inlet channel 51. There is no air resistance to open the thin plate structure during the entire pressing or rebounding process, which makes the pump head press light and provides a better user experience. A valve stem is movable inside the small piston 2.

[0023] In the preferred embodiment, refer to Figures 5 to 9 The small piston 2 has a protrusion 22 extending horizontally outward from its side end. An annular protrusion 23 extends upward from the protrusion 22. The movable cover 4 is provided with a mounting groove 43 with an opening facing downward. The upper part of the small piston 2 is inserted into the mounting groove 43. The mixing chamber 41 is located at the top of the mounting groove 43. The air outlet channel 42 is provided at the inner end of the mounting groove 43. The lower end of the mounting groove 43 is provided with a first through hole 44 that connects to the air outlet channel 42. The inner wall of the large piston 3 is provided with a first sealing part 31, and the lower end of the large piston 3 is provided with a second through hole 32 that connects the first through hole 44 and the gas storage chamber 11. The lower end of the first sealing part 31 is located between the outer wall of the mounting groove 43 and the inner wall of the annular protrusion 23. The first sealing part 31 is sealed and connected to the outer wall of the mounting groove 43 and the inner wall of the annular protrusion 23 and disconnects the connection between the first through hole 44 and the second through hole 32. The upper end of the first sealing part 31 is provided with a third through hole 33 that connects to the air intake channel 51 and the second through hole 32. The outer end of the mounting groove 43 is provided with an annular groove 45. The upper part of the large piston 3 is provided with a second sealing part 34, which is located in the annular groove 45. The second sealing part 34 is sealed and connected to the annular groove 45 and disconnects the connection between the third through hole 33 and the second through hole 32.

[0024] In the preferred embodiment, refer to Figure 9 The inner end of the mounting groove 43 is provided with several spaced ribs 46, and an air outlet channel 42 is formed between adjacent ribs 46.

[0025] In the preferred embodiment, refer to Figure 5 and Figure 7 The large piston 3 is provided with a third sealing part 35. The outer side wall of the third sealing part 35 is dynamically sealed to the inner side wall of the pump core 1. An air storage chamber 11 is formed between the inner side wall of the third sealing part 35 and the inner side wall of the pump core 1. As the third sealing part 35 moves downward, it can reduce the internal volume of the air storage chamber 11, increase the internal pressure of the air storage chamber 11, and allow the air in the air storage chamber 11 to enter the mixing chamber 41.

[0026] In the preferred embodiment, refer to Figure 5 A spring 6 is provided between the small piston 2 and the pump core 1. The spring force of the spring 6 can push the small piston 2 to move upward, thereby resetting the large piston 3, the movable cover 4 and the pressing assembly 5.

[0027] In a preferred embodiment, the pressing assembly 5 includes a pressing head 52 and a locking cover 53. The locking cover 53 is disposed on the top of the pump core 1. The pressing head 52 is movably connected to the locking cover 53. The lower part of the pressing head 52 is sealed to the upper part of the movable cover 4. An air inlet channel 51 is formed between the inner side wall of the locking cover 53 and the outer side wall of the pressing head 52. The pressing head 52 is provided with a liquid outlet channel 54 that communicates with the mixing chamber 41 and the outside.

[0028] In the preferred embodiment, refer to Figure 5 The cross-section of the first sealing part 31 is L-shaped; In the preferred embodiment, refer to Figure 5 The second sealing part 34 gradually slopes outward from bottom to top; In the preferred embodiment, refer to Figure 5A network 7 is provided in the liquid outlet channel 54. When the liquid in the mixing chamber 41 flows through the liquid outlet channel 54, it can be foamed through the network 7.

[0029] When using: Under normal circumstances, as referenced Figure 4 and Figure 5 The lower end of the first sealing part 31 is located between the outer side wall of the mounting groove 43 and the inner side wall of the annular protrusion 23. The first sealing part 31 is sealed to the outer side wall of the mounting groove 43 and the inner side wall of the annular protrusion 23 and disconnects the communication between the first through hole 44 and the second through hole 32. The second sealing part 34 is located in the annular groove 45. The second sealing part 34 is sealed to the annular groove 45 and disconnects the communication between the third through hole 33 and the second through hole 32. When pressing down on the 52nd button, refer to Figure 10 and 11 The pusher 52 can push the movable cover 4 downward, thereby driving the large piston 3 and the small piston 2 downward. During the movement, the first sealing part 31 disengages from the sealing contact with the annular protrusion 23, making the first through hole 44 and the second through hole 32 connected. When the large piston 3 moves downward, the third sealing part 35 moves downward along the gas storage chamber 11, thereby increasing the pressure in the gas storage chamber 11. This allows the air in the gas storage chamber 11 to pass through the second through hole 32, the first through hole 44 and the gas outlet channel 42 in sequence and enter the mixing chamber 41. During the downward movement of the small piston 2, it can pump the liquid in the bottle into the mixing chamber 41, so that the liquid and air are fully mixed in the mixing chamber 41. Then, the liquid in the mixing chamber 41 can enter the liquid outlet channel 54 and be foamed through the mesh 7. Finally, it is discharged to the outside through the liquid outlet channel 54. At this time, the spring 6 is compressed by the small piston 2. When the rebound press head reaches 52, refer to Figure 12 and Figure 13 Spring 6 pushes small piston 2 upward, thereby driving large piston 3, movable cover 4, and pusher 52 to reset. During the reset process, first sealing part 31 seals against annular protrusion 23, disconnecting the first through hole 44 and second through hole 32. As movable cover 4 moves upward, second sealing part 34 disengages from annular groove 45, connecting air intake channel 51 and third through hole 33. Outside air can then sequentially pass through air intake channel 51, third through hole 33, and second through hole 32 into air storage chamber 11, replenishing the air in air storage chamber 11 and balancing the pressure. Subsequently, the foam pump can reset to normal operation.

[0030] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A built-in spring foam pump, characterized in that, include: A pump core (1) is provided with a small piston (2) inside the pump core (1). A large piston (3) is connected to the upper part of the small piston (2). The large piston (3) is dynamically sealed to the pump core (1). An air storage chamber (11) is formed between the inner wall of the large piston (3) and the inner wall of the pump core (1). A movable cover (4) is connected to the upper part of the large piston (3). A pressing assembly (5) is provided on the top of the movable cover (4). An air inlet channel (5) is provided on the pressing assembly (5) to connect with the outside and the air storage chamber (11). 1) The large piston (3) is sealed to the movable cover (4) and disconnects the air inlet channel (51) and the air storage chamber (11). The small piston (2) is provided with a liquid passage (21). A mixing chamber (41) is provided between the liquid passage (21) and the movable cover (4). An air outlet channel (42) is provided on the movable cover (4) that connects the mixing chamber (41) and the air storage chamber (11). The small piston (2) is sealed to the large piston (3) and disconnects the air outlet channel (42) and the air storage chamber (11).

2. The built-in spring foam pump as described in claim 1, characterized in that, include: The small piston (2) has a protrusion (22) extending horizontally outward from its side end. The protrusion (22) has an annular protrusion (23) extending upward from its side end. The movable cover (4) has a mounting groove (43) with its opening facing downward. The upper part of the small piston (2) is inserted into the mounting groove (43). The mixing chamber (41) is located at the top of the mounting groove (43). The air outlet channel (42) is located at the inner end of the mounting groove (43). The lower end of the mounting groove (43) has a first through hole (44) that connects to the air outlet channel (42). The inner wall of the large piston (3) is provided with a first sealing part (31), and the lower end of the large piston (3) is provided with a second through hole (32) that connects the first through hole (44) and the gas storage chamber (11). The lower end of the first sealing part (31) is located between the outer wall of the mounting groove (43) and the inner wall of the annular protrusion (23). The first sealing part (31) is sealed and connected to the outer wall of the mounting groove (43) and the inner wall of the annular protrusion (23) and disconnects the connection between the first through hole (44) and the second through hole (32). The upper end of the first sealing part (31) is provided with a third through hole (33) that connects to the air intake channel (51) and the second through hole (32). The outer end of the mounting groove (43) is provided with an annular groove (45). The upper part of the large piston (3) is provided with a second sealing part (34). The second sealing part (34) is located in the annular groove (45). The second sealing part (34) is sealed and connected to the annular groove (45) and disconnects the connection between the third through hole (33) and the second through hole (32).

3. A built-in spring foam pump as described in claim 2, characterized in that, include: The inner end of the mounting groove (43) is provided with a number of spaced ribs (46), and an air outlet channel (42) is formed between adjacent ribs (46).

4. A built-in spring foam pump as described in claim 3, characterized in that, include: The large piston (3) is provided with a third sealing part (35), the outer wall of the third sealing part (35) is dynamically sealed to the inner wall of the pump core (1), and an air storage cavity (11) is formed between the inner wall of the third sealing part (35) and the inner wall of the pump core (1).

5. A built-in spring foam pump as described in claim 4, characterized in that, include: A spring (6) is provided between the small piston (2) and the pump core (1).

6. A built-in spring foam pump as described in claim 5, characterized in that, include: The pressing assembly (5) includes a press head (52) and a locking cover (53). The locking cover (53) is located on the top of the pump core (1). The press head (52) is movably connected to the locking cover (53). The lower part of the press head (52) is sealed to the upper part of the movable cover (4). An air inlet channel (51) is formed between the inner wall of the locking cover (53) and the outer wall of the press head (52). The press head (52) is provided with a liquid outlet channel (54) that connects to the mixing chamber (41) and the outside.

7. A built-in spring foam pump as described in claim 6, characterized in that, include: The first sealing part (31) has an L-shaped cross section.

8. A built-in spring foam pump as described in claim 6, characterized in that, include: The second sealing part (34) gradually slopes outward from bottom to top.

9. A built-in spring foam pump as described in claim 6, characterized in that, include: A network cable (7) is installed in the liquid outlet channel (54).

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