Double-chamber air pump

Abstract

The double-chamber air pump comprises a first pump set and a second pump set, the first pump set comprises a head cap, a sliding pipe, a supporting pipe, a piston assembly, a first one-way valve and a pump shell, the middle of the pump shell is fixedly connected with the lower end of the supporting pipe, and the lower end of the pump shell is connected with the first one-way valve; the head cap is inserted into the upper end of the sliding pipe, the middle of the sliding pipe slides in the supporting pipe, and the lower end of the sliding pipe is fixedly connected with a piston assembly which is provided with a second one-way valve. The pump shell is divided into a first cavity and a second cavity, a second piston is slidably connected into the second cavity, and the second piston abuts against the lower end of the head cap. The second pump set and the first pump set are the same in structure, and a connecting channel is arranged between the bottom ends of the pair of second cavities. The second piston is pushed to slide in the second cavity by pressing the head cap of the first pump set, high-pressure gas in the second cavity is pressed into the second cavity of the second pump set through the connecting channel, and the second piston and the head cap of the second pump set are jacked up.

Description

Technical Field

[0001] The invention relates to a dual-chamber air pump, in particular to a connecting channel of the dual-chamber air pump, and belongs to the field of fluid pumps. Background Art

[0002] A pump is a device that transports fluids. For example, a lotion pump is used in cosmetic packaging bottles. When pressed, it discharges a small amount of lotion. Its structure includes a bottle, a piston, a chamber, two one-way valves, and a spring. The piston moves within the chamber, creating alternating positive and negative pressures in the upper and lower halves of the chamber. The two one-way valves, connected to the upper and lower halves of the chamber, alternately open and close, thereby discharging the liquid from the bottle. The spring ensures that the piston automatically returns to its initial position. However, this type of pump has a drawback: if the spring fails, the piston is difficult to reset. Summary of the Invention

[0003] In order to overcome the above disadvantages, the present invention aims to provide a dual-chamber air pump to replace the spring-containing pump in the prior art.

[0004] In order to achieve the above objectives, the technical solution adopted by the present invention is as follows: a dual-chamber air pump, comprising a first pump group, the first pump group comprising a head cap, a slide tube, a support tube, a piston assembly, a first one-way valve and a pump housing, the middle portion of the pump housing being fixedly connected to the lower end of the support tube, and the lower end of the pump housing being connected to the first one-way valve; the head cap being plugged into the upper end of the slide tube, the middle portion of the slide tube sliding in the support tube, the lower end of the slide tube being fixedly connected to the piston assembly, and a second one-way valve being provided on the piston assembly; a first chamber being formed between the lower end of the support tube, the first one-way valve and the lower portion of the pump housing;

[0005] A second chamber is formed between the support tube and the upper part of the pump housing, and a second piston is slidably connected in the second chamber, and the second piston abuts against the lower end of the head cap; the dual-chamber air pump also includes a second pump group, the second pump group has the same structure as the first pump group, and a connecting channel is set between the bottom ends of a pair of second chambers.

[0006] The present invention is further configured as follows: a through hole is provided at the bottom of the side of the second chamber, and a sealing plug is provided in the through hole.

[0007] The present invention is further configured such that: the sealing plug is replaced by a third one-way valve.

[0008] The present invention is further configured as follows: the piston assembly includes a first piston, a support plate, a retaining ring, and a cannula, the cannula being fixedly connected to the center of the support plate, the upper end of the cannula being plugged into the lower end of the slide tube, the first piston being sleeved on the cannula or the slide tube, and the side surface of the first piston being slidably connected to the inner wall of the pump housing;

[0009] The second one-way valve is formed by a first piston, a support plate, a retaining ring, and a cannula or a sliding tube. A breathing hole is provided on the middle side of the cannula or the sliding tube. The retaining ring is connected to the cannula or the sliding tube. The first piston slides between the retaining ring and the support plate to avoid or block the breathing hole. The sliding tube and the retaining ring are integrally formed and are the same accessory.

[0010] The present invention is further configured such that: the lower end of the support tube is connected to the middle portion of the pump housing via a snap-fit ​​structure.

[0011] The present invention is further configured as follows: the lower end of the support tube is connected to a limiting member, and a sealing ring is provided between the limiting member, the support tube and the sliding tube.

[0012] The present invention is further configured as follows: the dual-chamber air pump also includes a screw cover, which is provided with a plurality of openings, and the head cap or sliding tube passes through the openings; the screw cover is connected to the bottle body, and the top end of the pump shell is clamped between the screw cover and the bottle body.

[0013] Compared with the prior art, the beneficial effect of the present invention is: by pressing the head cap of the first pump group, the second piston is pushed to slide in the second chamber, and the high-pressure gas in the second chamber is pressed into the second chamber of the second pump group through the connecting channel, and the second piston and head cap of the second pump group are lifted up.

[0014] Then, the head cap of the second pump unit is pressed, pushing the second piston to slide in the second chamber. The high-pressure gas in the second chamber is pressed into the second chamber of the first pump unit through the connecting channel, pushing up the second piston and the head cap of the first pump unit. This patent application does not use a spring reset, but still achieves the reset effect. It provides an alternative technical solution that is different from the existing technology.

[0015] The head cap drives the slide and piston assembly, creating alternating positive and negative pressures in the first chamber. This, in conjunction with the first and second check valves, pumps liquid into the slide and out through the head cap. By pressing both head caps, both the first and second pumps achieve a single discharge per press. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a dual-chamber air pump according to a preferred embodiment of the present invention;

[0017] Figure 2 It is a partially enlarged structural diagram of a dual-chamber air pump;

[0018] Figure 3 Schematic diagram of the structure of the piston assembly.

[0019] In the figure: 1. First pump group; 2. Second pump group; 3. Head cap; 4. Sliding pipe; 5. Support pipe; 6. Second piston; 7. Second chamber; 8. First piston; 9. Breathing hole; 10. Limiting piece; 11. Support plate; 12. Sealing plug; 13. Connecting channel; 14. Bottle body; 15. First chamber; 16. Screw cover; 17. Mouth; 18. First one-way valve; 19. Insert pipe; 20. Pump casing; 21. Sealing ring; 22. Retaining ring. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0021] See attached Figure 1-3 As shown, a dual-chamber air pump in this embodiment includes a first pump group 1, which includes a head cap 3, a slide tube 4, a support tube 5, a piston assembly, a first one-way valve 18 and a pump casing 20. The middle part of the pump casing 20 is fixedly connected to the lower end of the support tube 5, and the lower end of the pump casing 20 is connected to the first one-way valve 18; the head cap 3 is inserted into the upper end of the slide tube 4, the middle part of the slide tube 4 slides in the support tube 5, the lower end of the slide tube 4 is fixedly connected to the piston assembly, and the second one-way valve is provided on the piston assembly; the first chamber 15 is formed between the lower end of the support tube 5, the first one-way valve 18 and the lower part of the pump casing 20;

[0022] A second chamber 7 is formed between the support tube 5 and the upper part of the pump housing 20, and a second piston 6 is slidably connected in the second chamber 7, and the second piston 6 abuts against the lower end of the head cap 3; the dual-chamber air pump also includes a second pump group 2, and the second pump group 2 has the same structure as the first pump group 1, and a connecting channel 13 is set between the bottom ends of a pair of second chambers 7.

[0023] In order to facilitate the replenishment of gas into the second chamber 7 , the present invention is further configured as follows: a through hole is provided at the bottom of the side of the second chamber 7 , and a sealing plug 12 is provided in the through hole.

[0024] To facilitate automatic inflation and replenishment of air into the second chamber 7, the present invention further provides that the sealing plug 12 is replaced by a third one-way valve. When the air pressure in the second chamber 7 is insufficient, inflation and replenishment are automatically performed via the third one-way valve. When the air pressure exceeds atmospheric pressure, the third one-way valve automatically closes. In this embodiment, the second chamber 7 is filled with air. In other embodiments, the second chamber 7 may also be filled with liquid.

[0025] The present invention is further configured as follows: the piston assembly includes a first piston 8, a support plate 11, a retaining ring 22 and a cannula 19, the cannula 19 is fixedly connected to the center of the support plate 11, the upper end of the cannula 19 is inserted into the lower end of the slide tube 4, the first piston 8 is sleeved on the cannula 19 or the slide tube 4, and the side surface of the first piston 8 is slidably connected to the inner wall of the pump housing 20;

[0026] The second one-way valve is formed by a first piston 8, a support plate 11, a retaining ring 22, and a cannula 19 or a sliding tube 4. A breathing hole 9 is provided on the middle side of the cannula 19 or the sliding tube 4. The retaining ring 22 is connected to the cannula 19 or the sliding tube 4. The first piston 8 slides between the retaining ring 22 and the support plate 11 to avoid or cover the breathing hole 9. The sliding tube (4) and the retaining ring (22) are integrally formed and are the same accessory.

[0027] In actual use, the cannula 19 can be fully inserted into the slide tube 4, with the lower end of the slide tube 4 abutting the support plate 11. Alternatively, the cannula 19 can be omitted, with the slide tube 4 and support plate 11 directly connected. The first piston 8 is slidably mounted on the slide tube 4, and the breathing hole 9 is also provided on the slide tube 4. Alternatively, the cannula 19 can be of a certain length, with the first piston 8 slidably mounted on the cannula 19, and the breathing hole 9 provided on the cannula 19.

[0028] In order to facilitate assembly, the present invention is further configured such that the lower end of the support tube 5 and the middle portion of the pump housing 20 are connected via a snap-fit ​​structure.

[0029] In order to seal between the support tube 5 and the slide tube 4, the present invention is further configured as follows: the lower end of the support tube 5 is connected to a limit member 10, and a sealing ring 21 is provided between the limit member 10, the support tube 5 and the slide tube 4.

[0030] The present invention is further configured as follows: the dual-chamber air pump also includes a screw cover 16, a plurality of openings 17 are provided on the screw cover 16, and the head cap 3 or the sliding tube 4 passes through the openings 17; the screw cover 16 is connected to the bottle body 14, and the top end of the pump shell 20 is clamped between the screw cover 16 and the bottle body 14.

[0031] In summary, the method of using the dual-chamber air pump shown in the present invention is as follows: when the head cap 3 of the first pump group 1 is pressed, the head cap 3 drives the slide tube 4 to move downward, and the slide tube 4 slides in the support tube 5. At the same time, the second piston 6 abutted by the lower end of the head cap 3 slides downward in the second chamber 7, so that the gas in the second chamber 7 of the first pump group 1 is compressed to form high pressure. The high-pressure gas flows into the second chamber 7 of the second pump group 2 through the connecting channel 13, pushing the second piston 6 and the head cap 3 of the second pump group 2 to move upward, thereby resetting the second pump group 2.

[0032] During this process, the piston assembly at the lower end of the slide tube 4 moves downward along with the slide tube 4, and the first piston 8 slides on the inner wall of the pump housing 20, causing the pressure in the first chamber 15 to change. This, in conjunction with the first and second one-way valves 18 and 3, pumps liquid from the bottle 14 into the slide tube 4 and out through the header 3. Similarly, pressing the header 3 of the second pump unit 2 will push the header 3 of the first pump unit 1 back into place, simultaneously enabling liquid discharge from the second pump unit 2.

[0033] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-chamber air pump, comprising a first pump group (1), the first pump group (1) comprising a head cap (3), a slide tube (4), a support tube (5), a piston assembly, a first one-way valve (18) and a pump housing (20), wherein the middle portion of the pump housing (20) is fixedly connected to the lower end of the support tube (5), and the lower end of the pump housing (20) is connected to the first one-way valve (18); the head cap (3) is plugged into the upper end of the slide tube (4), the middle portion of the slide tube (4) slides in the support tube (5), the lower end of the slide tube (4) is fixedly connected to the piston assembly, and a second one-way valve is provided on the piston assembly; a first chamber (15) is formed between the lower end of the support tube (5), the first one-way valve (18) and the lower portion of the pump housing (20); It is characterized by: A second chamber (7) is formed between the support tube (5) and the upper part of the pump housing (20), and a second piston (6) is slidably connected in the second chamber (7), and the second piston (6) abuts against the lower end of the head cap (3); the dual-chamber air pump also includes a second pump group (2), and the second pump group (2) has the same structure as the first pump group (1), and a connecting channel (13) is set between the bottom ends of a pair of second chambers (7).

2. The dual-chamber air pump according to claim 1, characterized in that: A through hole is provided at the bottom of the side of the second chamber (7), and a sealing plug (12) is provided in the through hole.

3. The dual-chamber air pump according to claim 1, characterized in that The sealing plug (12) is replaced by a third one-way valve.

4. The dual-chamber air pump according to claim 1, characterized in that The piston assembly comprises a first piston (8), a support plate (11), a retaining ring (22) and a cannula (19); the cannula (19) is fixedly connected to the center of the support plate (11); the upper end of the cannula (19) is plugged into the lower end of the slide tube (4); the first piston (8) is sleeved on the cannula (19) or the slide tube (4); and the side surface of the first piston (8) is slidably connected to the inner wall of the pump housing (20); The second one-way valve is formed by a first piston (8), a supporting plate (11), a retaining ring (22), and a plug (19) or a sliding tube (4). A breathing hole (9) is provided on the side of the middle portion of the plug (19) or the sliding tube (4). The retaining ring (22) is connected to the plug (19) or the sliding tube (4). The first piston (8) slides between the retaining ring (22) and the supporting plate (11) to avoid or cover the breathing hole (9). The sliding tube (4) and the retaining ring (22) are integrally formed and are the same accessory.

5. The dual-chamber air pump according to claim 1, characterized in that: The lower end of the support tube (5) and the middle part of the pump housing (20) are connected via a snap-fit ​​structure.

6. The dual-chamber air pump according to claim 1, characterized in that The lower end of the support tube (5) is connected to a limiting member (10), and a sealing ring (21) is provided between the limiting member (10), the support tube (5) and the sliding tube (4).

7. The dual-chamber air pump according to claim 1, characterized in that The double-chamber air pump further comprises a screw cover (16), a plurality of openings (17) are provided on the screw cover (16), and the head cap (3) or the sliding tube (4) passes through the openings (17); the screw cover (16) is connected to the bottle body (14), and the top end of the pump housing (20) is clamped between the screw cover (16) and the bottle body (14).

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